Classification of meteorites [59].
\\n\\n
Released this past November, the list is based on data collected from the Web of Science and highlights some of the world’s most influential scientific minds by naming the researchers whose publications over the previous decade have included a high number of Highly Cited Papers placing them among the top 1% most-cited.
\\n\\nWe wish to congratulate all of the researchers named and especially our authors on this amazing accomplishment! We are happy and proud to share in their success!
\\n"}]',published:!0,mainMedia:null},components:[{type:"htmlEditorComponent",content:'IntechOpen is proud to announce that 179 of our authors have made the Clarivate™ Highly Cited Researchers List for 2020, ranking them among the top 1% most-cited.
\n\nThroughout the years, the list has named a total of 252 IntechOpen authors as Highly Cited. Of those researchers, 69 have been featured on the list multiple times.
\n\n\n\nReleased this past November, the list is based on data collected from the Web of Science and highlights some of the world’s most influential scientific minds by naming the researchers whose publications over the previous decade have included a high number of Highly Cited Papers placing them among the top 1% most-cited.
\n\nWe wish to congratulate all of the researchers named and especially our authors on this amazing accomplishment! We are happy and proud to share in their success!
\n'}],latestNews:[{slug:"stanford-university-identifies-top-2-scientists-over-1-000-are-intechopen-authors-and-editors-20210122",title:"Stanford University Identifies Top 2% Scientists, Over 1,000 are IntechOpen Authors and Editors"},{slug:"intechopen-authors-included-in-the-highly-cited-researchers-list-for-2020-20210121",title:"IntechOpen Authors Included in the Highly Cited Researchers List for 2020"},{slug:"intechopen-maintains-position-as-the-world-s-largest-oa-book-publisher-20201218",title:"IntechOpen Maintains Position as the World’s Largest OA Book Publisher"},{slug:"all-intechopen-books-available-on-perlego-20201215",title:"All IntechOpen Books Available on Perlego"},{slug:"oiv-awards-recognizes-intechopen-s-editors-20201127",title:"OIV Awards Recognizes IntechOpen's Editors"},{slug:"intechopen-joins-crossref-s-initiative-for-open-abstracts-i4oa-to-boost-the-discovery-of-research-20201005",title:"IntechOpen joins Crossref's Initiative for Open Abstracts (I4OA) to Boost the Discovery of Research"},{slug:"intechopen-hits-milestone-5-000-open-access-books-published-20200908",title:"IntechOpen hits milestone: 5,000 Open Access books published!"},{slug:"intechopen-books-hosted-on-the-mathworks-book-program-20200819",title:"IntechOpen Books Hosted on the MathWorks Book Program"}]},book:{item:{type:"book",id:"1562",leadTitle:null,fullTitle:"Current Topics in Ionizing Radiation Research",title:"Current Topics in Ionizing Radiation Research",subtitle:null,reviewType:"peer-reviewed",abstract:'Since the discovery of X rays by Roentgen in 1895, the ionizing radiation has been extensively utilized in a variety of medical and industrial applications. However people have shortly recognized its harmful aspects through inadvertent uses. Subsequently people experienced nuclear power plant accidents in Chernobyl and Fukushima, which taught us that the risk of ionizing radiation is closely and seriously involved in the modern society. In this circumstance, it becomes increasingly important that more scientists, engineers and students get familiar with ionizing radiation research regardless of the research field they are working. Based on this idea, the book "Current Topics in Ionizing Radiation Research" was designed to overview the recent achievements in ionizing radiation research including biological effects, medical uses and principles of radiation measurement.',isbn:null,printIsbn:"978-953-51-0196-3",pdfIsbn:"978-953-51-4330-7",doi:"10.5772/2027",price:169,priceEur:185,priceUsd:219,slug:"current-topics-in-ionizing-radiation-research",numberOfPages:856,isOpenForSubmission:!1,isInWos:1,hash:"b1443bb4589a4088326076be6ff30f13",bookSignature:"Mitsuru Nenoi",publishedDate:"March 9th 2012",coverURL:"https://cdn.intechopen.com/books/images_new/1562.jpg",numberOfDownloads:102724,numberOfWosCitations:114,numberOfCrossrefCitations:25,numberOfDimensionsCitations:87,hasAltmetrics:1,numberOfTotalCitations:226,isAvailableForWebshopOrdering:!0,dateEndFirstStepPublish:"April 11th 2011",dateEndSecondStepPublish:"May 9th 2011",dateEndThirdStepPublish:"September 13th 2011",dateEndFourthStepPublish:"October 13th 2011",dateEndFifthStepPublish:"February 12th 2012",currentStepOfPublishingProcess:5,indexedIn:"1,2,3,4,5,6,7,8",editedByType:"Edited by",kuFlag:!1,editors:[{id:"35416",title:"Dr.",name:"Mitsuru",middleName:null,surname:"Nenoi",slug:"mitsuru-nenoi",fullName:"Mitsuru Nenoi",profilePictureURL:"https://mts.intechopen.com/storage/users/35416/images/2328_n.jpg",biography:"Mitsuru Nenoi graduated from Kyoto University, Graduate School of Sciences, Japan in 1983, and started his career as a scientist at National Institute of Radiological Sciences (NIRS), Japan. He received a Ph.D from Kyoto University in 1992 for the study on induced accumulation of polyubiquitin gene transcripts after exposure to ultraviolet light and treatment with 12-O-Tetradecanoylphorbol 13-acetate. In 1991, he stayed at University of Cincinnati College of Medicine, USA as a visiting scientist, and was involved in the study of mechanisms for transcriptional regulation of small heat shock genes of Drosophila. Dr. Nenoi is now a Director, Radiation Risk Reduction Research Program, Research Center for Radiation Protection of NIRS. 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Brunner, studied the plastic properties of high-purity W single crystals (1998). His researches span various areas of the physical metallurgy of high-purity refractory metals and alloys. In particular, he is interested in both theory and practice of growing single crystals and bicrystals of transition metals, studying the crystallographically related surface properties of high-purity refractory metals of 4, 5 and 6 groups of the Periodic Table. He is an expert in the electron-beam floating zone melting technique as well as in various techniques for high-temperature processing single-crystalline and polycrystalline high-purity refractory metals and alloys. Nowadays, scientific interests of Prof. Vadim Glebovsky extends from some aspects of application his high purity refractory metals and compounds as the effective diffusion barrier layers in Very-Large-Scale Intergration (VLSI) to a new generation of high-sensitivity detectors made of low-radioactivity Ti for registration of the “Dark Matter” particles. Prof. Vadim Glebovsky has published more than 320 scientific articles and patents, 1 book in Russian on levitation melting, 5 chapters and has edited 3 books on various aspects of functional materials.",institutionString:"Institute of Solid State Physics, Russian Academy of Sciences",position:null,outsideEditionCount:0,totalCites:0,totalAuthoredChapters:"6",totalChapterViews:"0",totalEditedBooks:"3",institution:{name:"Institute of Solid State Physics",institutionURL:null,country:{name:"Russia"}}}],coeditorOne:null,coeditorTwo:null,coeditorThree:null,coeditorFour:null,coeditorFive:null,topics:[{id:"950",title:"Solid-State Chemistry",slug:"metals-and-nonmetals-solid-state-chemistry"}],chapters:[{id:"64240",title:"Introductory Chapter: Growing W Single Crystals by EBFZM for Studying Mechanical Behavior",slug:"introductory-chapter-growing-w-single-crystals-by-ebfzm-for-studying-mechanical-behavior",totalDownloads:331,totalCrossrefCites:0,authors:[{id:"101945",title:"Dr.",name:"Vadim",surname:"Glebovsky",slug:"vadim-glebovsky",fullName:"Vadim Glebovsky"}]},{id:"64886",title:"Doping of SiC Crystals during Sublimation Growth and Diffusion",slug:"doping-of-sic-crystals-during-sublimation-growth-and-diffusion",totalDownloads:773,totalCrossrefCites:0,authors:[{id:"56559",title:"Dr.",name:"Evgenii",surname:"Mokhov",slug:"evgenii-mokhov",fullName:"Evgenii Mokhov"}]},{id:"67610",title:"Numerical Analysis of Liquid Menisci in the EFG Technique",slug:"numerical-analysis-of-liquid-menisci-in-the-efg-technique",totalDownloads:328,totalCrossrefCites:0,authors:[{id:"267600",title:"Dr.",name:"Vladimir",surname:"Kurlov",slug:"vladimir-kurlov",fullName:"Vladimir Kurlov"},{id:"267604",title:"Dr.",name:"Sergei",surname:"Rossolenko",slug:"sergei-rossolenko",fullName:"Sergei Rossolenko"},{id:"303450",title:"Dr.",name:"Irina",surname:"Shikunova",slug:"irina-shikunova",fullName:"Irina Shikunova"},{id:"303451",title:"MSc.",name:"Dmitry",surname:"Stryukov",slug:"dmitry-stryukov",fullName:"Dmitry Stryukov"},{id:"305856",title:"Dr.",name:"Gleb",surname:"Katyba",slug:"gleb-katyba",fullName:"Gleb Katyba"},{id:"305857",title:"Dr.",name:"Irina",surname:"Dolganova",slug:"irina-dolganova",fullName:"Irina Dolganova"},{id:"305858",title:"Dr.",name:"Kirill",surname:"Zaitsev",slug:"kirill-zaitsev",fullName:"Kirill Zaitsev"}]},{id:"68309",title:"Growth of Single-Crystal LiNbO3 Particles by Aerosol-Assisted Chemical Vapor Deposition Method",slug:"growth-of-single-crystal-linbo-sub-3-sub-particles-by-aerosol-assisted-chemical-vapor-deposition-met",totalDownloads:293,totalCrossrefCites:0,authors:[{id:"266498",title:"Dr.",name:"Jose",surname:"Murillo",slug:"jose-murillo",fullName:"Jose Murillo"},{id:"309134",title:"Dr.",name:"Jose",surname:"Ocón",slug:"jose-ocon",fullName:"Jose Ocón"},{id:"309135",title:"Dr.",name:"Guillermo",surname:"Herrera",slug:"guillermo-herrera",fullName:"Guillermo Herrera"},{id:"309136",title:"Mr.",name:"Jose",surname:"Murillo-Ochoa",slug:"jose-murillo-ochoa",fullName:"Jose Murillo-Ochoa"},{id:"309137",title:"Prof.",name:"Gabriela",surname:"Ocón",slug:"gabriela-ocon",fullName:"Gabriela Ocón"}]},{id:"64923",title:"Epitaxial Growth of Thin Films",slug:"epitaxial-growth-of-thin-films",totalDownloads:653,totalCrossrefCites:1,authors:[{id:"265827",title:"Dr.",name:"Daniel",surname:"Rasic",slug:"daniel-rasic",fullName:"Daniel Rasic"},{id:"265828",title:"Prof.",name:"Jagdish",surname:"Narayan",slug:"jagdish-narayan",fullName:"Jagdish Narayan"}]},{id:"64633",title:"Conventional and Unconventional Crystallization Mechanisms",slug:"conventional-and-unconventional-crystallization-mechanisms",totalDownloads:721,totalCrossrefCites:0,authors:[{id:"270681",title:"M.Sc.",name:"Kamila",surname:"Chaves",slug:"kamila-chaves",fullName:"Kamila Chaves"},{id:"270682",title:"MSc.",name:"Thaís Jordânia",surname:"Silva",slug:"thais-jordania-silva",fullName:"Thaís Jordânia Silva"},{id:"270683",title:"Prof.",name:"Ana Paula Badan",surname:"Ribeiro",slug:"ana-paula-badan-ribeiro",fullName:"Ana Paula Badan Ribeiro"},{id:"271200",title:"Prof.",name:"Maria Aliciane",surname:"Fontenele Domingues",slug:"maria-aliciane-fontenele-domingues",fullName:"Maria Aliciane Fontenele Domingues"},{id:"282324",title:"Prof.",name:"Daniel",surname:"Barrera-Arellano",slug:"daniel-barrera-arellano",fullName:"Daniel Barrera-Arellano"}]}],productType:{id:"1",title:"Edited Volume",chapterContentType:"chapter",authoredCaption:"Edited by"},personalPublishingAssistant:{id:"177730",firstName:"Edi",lastName:"Lipovic",middleName:null,title:"Mr.",imageUrl:"https://mts.intechopen.com/storage/users/177730/images/4741_n.jpg",email:"edi@intechopen.com",biography:"As an Author Service Manager my responsibilities include monitoring and facilitating all publishing activities for authors and editors. 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In the Russian text of 1924, Oparin (1938) suggested that simple molecules (e.g., CH4, NH3) in the early Earth, reacted to form small bio-molecules and complex bio-polymers (e.g., nucleoside, nucleotide, peptide, polynucleotide) which then evolved into multimolecular functional systems, and finally ‘life’ [1]. A few years later, Haldane (1929) independently proposed a similar hypothesis for the origins of life [2]. It was Bernal (1951), however, who first suggested that clay minerals played a key role in chemical evolution and the origins of life because of their ability to take up, protect (against ultraviolet radiation), concentrate, and catalyze the polymerization of, organic molecules [3]. Indeed, Cains-Smith (1982) has suggested that clay minerals can store and replicate structural defects, dislocations, and ionic substitutions, and act as ‘genetic candidates’ [4]. Thus, intercalation of organic molecules and monomers into the layer structure of clay minerals, such as montmorillonite and kaolinite, would favor the formation and replication of biopolymers with specified sequences (e.g., enzymes, polynucleotides).
The composition of the primitive atmosphere is an important factor influencing the formation of small biomolecules. Urey (1952) and Miller and Urey (1959) proposed that the early Earth had a reducing atmosphere, and conducted their experiments on chemical evolution accordingly [5, 6]. Computer simulation, however, would indicate that the primitive atmosphere was not reducing. Moreover, it was very difficult to synthesize bio-organic molecules under reducing conditions.
In this review we describe the environment of the primitive Earth, outline the clay-induced formation of small molecules and simple bio-molecules, discrimination of optical isomers, and polymerization of bio-molecules, and then briefly remark on the RNA world and the origin of cells.
In discussing the origins of life, it is important to know the state of the early Earth. Cosmic dust grains, rotating around the primitive Sun, coalesced to form planetesimals, and then larger bodies (e.g., planets) through gravitation, giving rise to the solar system about 4.6 billion years ago [7]. The surface of the primitive Earth was molten to a depth of 1000 km [8]. The light elements had disappeared into space but various gases were retained on the surface by gravitation. As the temperature decreased, the surface of the magma ocean gradually solidified. Water vapor, carbon oxide, nitrogen gas began to cover the Earth surface, forming the primitive atmosphere. Water vapor gave rise to clouds which turned into rain, feeding rivers and oceans. Dissolved metal ions from rocks entered into the primitive ocean. Lightnings and volcanic eruptions often occurred. Small and large meteorites also bombarded the early Earth. These events and light from the sun were conducive to creating simple organic compounds and small bio-molecules.
In an early paper, Urey (1952) suggested that Earth’s primitive atmosphere was mainly composed of anoxic gases (e.g. NH3, CH3) and water vapor [5]. On the other hand, Levine et al. (1982) proposed that non-reductive gases (e.g. CO, CO2, N2) made up the paleoatmosphere [9]. More recently, Owen (2008) argued for a composition between anoxic and non-reductive gases [10].
There are basically two types of meteorites: primitive and fractionated. Table 1 shows a classification scheme for meteorites. Carbonaceous (C-)chondrite is considered to be the earliest type of meteorite, containing a ‘memory’ of the primitive solar system. C-chondrites are mainly composed of Mg-rich minerals including a hydrous silicate, serpentine. They also contain organic and bio-organic molecules (e.g., amino acids). When such meteorites rained down on the early Earth, the energy of collision would convert simple organic molecules to bio-organic compounds. Table 2 lists the range and variety of organic molecules in space.
The craters on Moon were formed about 3.8−4.0 billion years ago through bombardment by meteorites and asteroids [11]. At the same time, huge numbers of meteorite and asteroids would have hit the relatively larger Earth because of its proximity to Moon. As a result, the surface temperature of Earth would markedly increase, and most liquid water would have evaporated. Likewise, many simple organic compounds or large bio-molecules that were present, or formed through meteorite impact, would have volatilized or decomposed.
Stony chondrites |
Enstatite chondrites |
H(high-Fe) chondrites |
L(low-Fe) chondrites |
LL(low Fe and low metal) chondrites |
Carbonaceous chondrites: Type I No Chondrule, & Type II Chondrule |
Achondrites |
Ca-poor: Aubrites, Diogenites, Ureilites, Chassignite |
Ca-rich: Angrite, Nalhlites, Eucrites, Howardites |
Stony- Irons |
Pallasites, Mesosiderites |
Irons |
I AB, II AB, IIAB, IVA, IV B |
Classification of meteorites [59].
Nitryl and acetylene derivative etc. |
HCN, HC3N, HC5N, HC7N, HC9N, HC11N, HC2CHO, CH3CN, CH3C3N, CH3C2H, |
CH3CH2CN, CH2, CHCN, HNC, HNCO, HNCS, HNCCC, CH3NC, HCCNC |
Aldehyde, Alcohol, Ether, Ketone, Amine, etc. |
H2CO, H2CS, CH3CHO, NH2CHO, H2CCO, CH3OH, CH3CH2OH, CH3SH, (CH3)2O, |
(CH3)2CO, HCOOH, HCOOCH3, CH3COOH, CH2NH, CH3NH2, NH2CN, H2C3, H2C4, H2C6 |
Allene |
c-C3H2, c-SiC2, c-C3H, c-C2H4O |
Molecular ions |
HCS+, CO+, HCO+, HOCO+, H2COH+, HCNH+, HC3NH+, HOC+ |
Radical |
OH, CH, CH2, NH2, HNO, C2H, C3H, C4H, C5H, C6H, C7H, C8H, CN, C3N, C5N, CH2CN, |
CH2N, NaCN, C2O, NO, SO, HCO, MgNC, MgCN, C2S, NS |
Organic molecules in space [60]. c- (Allene): circlar.
Clay minerals would have formed by weathering of volcanic glass and rocks. Also, when the temperature of land and atmosphere decreased, the highly concentrated cations and anions in the primitive ocean would have precipitated on the primitive ocean floor, and there interacted to yield certain compounds. The oldest rock on Earth is sedimentary in origin, suggesting that land erosion by rivers had already happened. Water would have come into contact with volcanic glass and rocks, opening the way to clay mineral formation. The Mars investigation indicates the occurrence in the planet’s surface of clay minerals with an age of > 3.5 Ga, and a chemical composition consistent with Al-Si-O-H and Mg-Si-O-H systems [12]. By analogy, clay minerals would have formed on the early Earth.
The bio-organic compounds of ‘life’ comprise amino acids, nucleic acid bases, sugars, and lipids (Tables 3 and 4; Figure 1). The role of clay minerals in the synthesis of amino acids, nucleic acid bases and sugars is described below.
Amino acid | Side chaine (R) | Amino acid | Side chaine (R) |
Glycine (Gly) | -H | Aspartic acid (Asp) | |
Alanine (Ala) | -CH3 | Glutamic acid (Glu) | |
Valine (Val) | Asparagine (Asn) | ||
Leucine (Leu) | Glutamine (Gln) | ||
Isoleucine (Ile) | Lysine(Lys) | -CH2-CH2-CH2-CH2-NH2 | |
Phenylalanine (Phe) | Arginine (Arg) | ||
Tyrosine(Tyr) | Histidine (His) | ||
Serine (Ser) | -CH2-OH | Tryptophan (Try) | |
Threonine(Thr) | Proline (Pro) | ||
Cysteine (Cys) | -CH2-SH | ||
Methionine (Met) | -CH2-CH2-S-CH3 |
Twenty bio-amino acids and their side chains. Proline: the side chaine is red. The structure of the amino acid: R-CH(NH2)-COOH
Phosphatidate Phosphatidylcholine Phosphatidylethnolamine Phosphatidylglycerol Phosphatidylinositol Phosphatidylserine Cardiolipin Sphingomyelin Glycolipid Cholesterol |
Main lipids of biologial membrane. [61]
Components of RNA (or DNA) and nucleoside and nucleotide.
Miller and Urey (1959) were able to synthesize bio-molecules from simple precursors (e.g., NH3, CH3, water) by circulating the mixture past an electric discharge (“spark”), simulating a lightning strike. Table 5 lists the compounds obtained abiotically under reducing atmospheric conditions. When montmorillonite was added to Miller’s (1953) system, Shimoyama et al. (1978) found that the yield of amino acids with an alkylated side chain increased [13, 14] (Table 5). Subsequently, Yuasa (1989) conducted the sparking experiment using HCN and NH4(OH) in the presence of montmorillonite [15], obtaining glycine, alanine, and aspartic acid as the main products.
Glycine | Succinic acid |
Glycolic acid | Aspartic acid |
Sarcosine | Glutamic acid |
Alanine | Iminodiacetic acid |
Lactic acid | Iminoacetic-propionic acid |
N-Methylalanine | Formic acid |
α-Amino-n-butyric acid | Acetic acid |
α-Aminoisobutyric acid | Propionic acid |
α-Hydroxybutyric acid | Urea |
β-Alanine | N-Methy urea |
Some components of the primitive atmosphere are soluble in water. Under hydrothermal conditions, as would pertain in a thermal vent, the dissolved components would react to form various amino acids (e.g., glycine, alanine, lysine, isoleucine) as Marshall (1994) has reported [16].
The primitive atmosphere might not have been reducing, however. Further, bio-organic molecules are difficult to obtain under the conditions used by Miller (1953) [14]. In an attempt to make for favorable conditions, Kobayashi et al. (1990) used proton irradiation to produce a reducing atmosphere from an oxidizing one [17]. Nevertheless, the role of clay minerals in the formation of bio-molecules remains uncertain. Infrared spectroscopy suggests that the dust in the diffuse interstellar medium contains aliphatic hydrocarbons [18]. Again, it is uncertain whether clay minerals are involved in their formation.
Clay minerals would be capable of adsorbing bio-organic molecules from the early ocean. The resultant clay-organic complexes would partly be deposited on the ocean floor.
Greenland et al. (1962, 1965) investigated the interactions of various amino acids with H-, Na-, and Ca-montmorillonites [19, 20]. Arginine, histidine, and lysine adsorbed to Na- and Ca- montmorillonites by cation exchange. Other amino acids (alanine, serine, leucine, aspartic acid, glutamic acid, phenylalanine) adsorbed to H-montmorillonite by proton transfer. The adsorption of glycine and its oligo-peptides by Ca-montmorillonite and Ca-illite increased with the degree of oligomerization (molecular weight). Hedges and Hare (1987) suggested that the amino and carboxyl groups of the amino acids were involved in their adsorption to kaolinite [21], while Dashman and Stotzky (1982, 1984) reported that kaolinite adsorbed less amino acids and peptides than did montmorillonite [22, 23].
Serpentine is a clay mineral, formed by the weathering of olivine and pyroxene. As such, serpentine would be expected to occur on the surface of the early Earth. Serpentine, however, has a limited capacity for taking up amino acids (Hashizume, 2007) although it can adsorb measurable amounts of aspartic and glutamic acids [24]. On the other hand, allophane can take up appreciable amounts of alanine [25]. The adsorption isotherms showed three distinct regions as the (equilibrium) concentration (Ce) of alanine increased: a nearly linear rise at low Ce, a leveling off to a plateau at intermediate Ce, and a steep linear increase at high Ce. The oligomers of alanine were also adsorbed by allophane but the extent of adsorption did not vary greatly with solute molecular weight [26].
Amino acids can exist in two enantiomeric (chiral) types, namely, D (dextrorotatory) and L (levorotatory) (Figure 2). Both enantiomers would have formed, in equal amounts under abiotic conditions, giving a racemic mixture with a D/L molar ratio of 1/1. The amino acids in living organisms, however, are generally of the L-type. This finding is one of the problems associated with the origins of life.
D- and L-enantiomers (“mirror” images) of amino acids. R represents the side chain (Table 3).
The question arises whether clay minerals can discriminate between D- and L-amino acids when placed in contact with a racemic mixture. Using Na-montmorillonite and a racemic mixture of several amino acids, Friebele et al. (1981) did not observe any difference in adsorption between the D- and L-enantiomers [27]. This finding is not altogether surprising since clay minerals have no chirality in their bulk structures although the layer structure of kaolinite may be chiral due to the presence and positioning of vacancies (Figure 3). The edge surface of a montmorillonite layer may also be structurally chiral due to the presence of defects. These chiral structures, however, are not individually separable.
Overlap of Al atoms in stacked layers of kaolinite. Black circles indicate occupied Al site, and white circles indicate vacant Al sites [62].
On the other hand, quartz crystals are intrinsically chiral and, as such, can show stereo-specific effects. Bonner et al. (1974), for example, found that L-quartz preferred L-alanine to its D-enantiomer, while D-quartz adsorbed more D- than L-alanine. The difference in preference was about 1%. Interestingly, Siffert and Naidja (1992) reported that montmorillonite showed stereo-selectivity in the adsorption and deamination of aspartic and glutamic acids. Likewise, Hashizume et al. (2002) reported that an allophane from New Zealand, extracted from a volcanic ash soil, showed a clear preference for L-alanyl-L-alanine over its D-enantiomer [30]. They suggested that the size, intramolecular charge separation, and surface orientation of L-alanyl-L-alanine zwitterions combined to confer ‘structural chirality’ to the allophane-amino acid complex. Although the allophane sample was purified before use, the presence of trace amounts of organic matter might have left a chiral ‘imprint’.
Nucleic acids contain two purine bases (adenine, guanine), and three pyrimidine bases (cytosine, uracil, thymine) (Figure 1). Uracil and thymine are found in RNA and DNA, respectively.
Adenine could be prebiotically synthesized from hydrogen cyanide, and cytosine from cyanoacetylene, while uracil could arise from cyanoacetylene via malic acid. Chittenden and Schwartz (1976) reported that the addition of montmorillonite increased the rate of adenine formation [32].
No nucleic acid bases were found in the Miller experiment [6]. Adenine was formed, however, when a mixture of HCN and montmorillonite was added to the reaction vessel, and exposed to lightning [15]. Similarly, uracil could be synthesized from CO, N2 and H2O by proton irradiation [17].
The adsorption of nucleic acid bases by montmorillonite has been widely investigated. Lawless et al. (1984) and Banin et al. (1984) reported that the adsorption of adenosine monophosphate (AMP) by montmorillonite, containing different exchangeable cations (Zn, Cu, Mn, Fe, Ca, Co, Ni), generally increased as solution pH decreased [33, 34]. In the case of Zn-montmorillonite, adsorption of 5’-AMP reached a maximum at pH ~7. The extent of adsorption was primarily influenced by the acid dissociation constant of the nucleic acid base. Winter and Zubay (1995) investigated the relative ability of montmorillonite and hydroxylapatite in adsorbing adenine and adenine-related compounds [35]. They found that montmorillonite adsorbed more adenine than the other compounds (adenosine, 5’-AMP, 5’-ADP, 5’-ATP), while hydroxylapatite preferred adenosine phosphate to adenine and adenosine. The extent of adsorption depended on solution pH, and might also be affected by the buffer used.
More recently, Hashizume et al. (2010) investigated the adsorption of adenine, cytosine, uracil, ribose, and phosphate by Mg-montmorillonite [36]. At comparable concentrations in the equilibrium solution, adsorption decreased in the order adenine > cytosine > uracil, while ribose was hardly adsorbed. Hashizume and Theng (2007) found that allophane had a greater affinity for 5’-AMP than for adenine, adenosine, or ribose [37]. Again, very little ribose was adsorbed. The strong adsorption of 5’-AMP accords with the high phosphate-retention capacity of allophane [38].
The adsorption of nucleic acid bases to clay mineral surfaces has also been assessed by computer simulation. An ab initio study by Michalkova et al. (2011) suggests that uracil was adsorbed perpendicularly to the kaolinite surface [39]. With montmorillonite, on the other hand, nucleic acid bases tend to adsorb in a face-to-face orientation with respect to the basal siloxane plane [40].
Peptides are polymers of amino acids (Table 3; Figure 4). On the early earth, peptides may have formed at places where energy is produced, such as thermal vents on the sea floor. The primitive ocean may have contained small bio-molecules, including amino acids. As already mentioned, clay minerals would have played an important role in concentrating and polymerizing such molecules on their surfaces.
Polymerization of amino acids. Red indicates peptide bonding. R1 and R2 represent amino acid side chains (Table 3).
According to the thermal vent model, organic molecules sink to the sea floor around a thermal vent, and polymerize under conditions of high pressure and temperature [43]. The polymers formed would then move away from the thermal vent. Imai et al. (1997) have attempted to synthesize oligopeptides in a flow reactor, simulating a submarine hydrothermal system [44]. Details of the instrumentation have been given by Matsuno (1997) [45]. With glycine as the monomer, both di- and tri-glycine were formed. The effect of metal cations on amino acid oligomerization was also investigated but that of clay minerals has not been assessed.
The temperature of seawater on the early Earth is expected to be appreciably higher than that at present, a condition that would favor organic molecule polymerization. The thermal copolymerization of various amino acids (aspartic acid, glutamic acid, glycine, alanine, leucine) has been reported by Fox and Harada (1958). Indeed, they were able to synthesize a protenoid microsphere [46].
Plate tectonics would have been operative in the early Earth. When organic-rich sediments moved into a trench where the temperature and pressure are higher than at the surface, the water in the sediments would be depleted. As a result, the concentration of organic molecules would increase, promoting their polymerization [47]. The synthesis of glycine peptides with montmorillonite under trench-like hydrothermal conditions (5−100 MPa pressure; 150 ºC temperature) has been reported by Ohara et al. (2007) who obtained up to 10-mers of glycine [48].
Clay mineral particles on the beach undergo repeated drying and wetting, being dried at low tide, and wetted at high tide. This condition would favor polymerization of the clay-associated organic molecules. Using kaolinite and bentonite as the clay minerals, and glycine as the organic species, Lahav et al. (1978) obtained measurable amounts of glycine oligomers up to the 5-mer [49], as shown in Table 6. Ferris et al. (1996) obtained about 50-mers of glutamic acid [50] by incubating (activated) glutamic acid with illite.
In a “shock” experiment, simulating collision of meteorite and asteroids with Earth, by Blank et al. (2001) amino acids were polymerized into oligo-peptides (mostly dimers and trimmers) [51].
Cycles | Net heating | Yields (nmol/mg clay) | ||||||
No. | period (days) | Dimer | Trimer | Tetramer | Pentamer | |||
Kaolinite | ||||||||
11 | 33.7 | 2.27 | 0.45 | |||||
21 | 55.0 | 1.99 | 0.79 | 0.29 | trace | |||
27 | 67.4 | 2.25 | 1.01 | 0.33 | trace | |||
33 | 77.3 | 2.21 | 0.83 | 0.32 | trace | |||
27 | 67.4 | 0.97 | 0.38 | 0.10 | trace | |||
27 | 67.4 | 1.31 | 0.55 | 0.15 | trace | |||
27 | 67.4 | 3.50 | 1.58 | 0.60 | trace | |||
Bentonite | ||||||||
11 | 32.8 | 6.37 | 0.20 | n.d. | n.d. | |||
21 | 55.0 | 7.99 | 0.60 | n.d. | n.d. | |||
27 | 67.4 | 4.92 | 0.61 | trace | n.d. | |||
27 | 67.4 | 2.92 | 0.20 | n.d. | n.d. | |||
27 | 67.4 | 12.7 | 1.90 trace | n.d. | ||||
11 | 57.0 | 36.7 | 8.2 | 2.5 | ||||
1 | 10.6 | 11.9 trace | n.d. | |||||
5 | 25.4 | 26.9 | 1.9 | n.d. | ||||
11 | 57.0 | 40.1 | 7.9 | 1.2 | 0.8 |
Yields of glycine oligomers in the presence of kaolinite and bentonite, subjected to wetting and drying cycles [49]. n.d. = not detected
One hypothesis concerning the origins of life involves the ‘RNA world’ in which RNA molecules acted as both enzyme-like catalysts and genetic materials [52]. The four nucleic acid bases in RNA have a complementary function. Thus. RNA would be able behave like DNA, although uracil (U) and ribose were used in RNA instead of thymine (T) and deoxyribose in DNA [53]. The molecule of RNA is composed of a nucleic acid base, ribose and phosphate. Combination of a nucleic acid base with 1’-ribose gives rise to a nucleoside, and the addition of phosphate at the 3’- and 5’- positions of ribose yields a nucleotide (Figure 1). RNA is therefore a polynucleotide.
The clay-catalyzed synthesis of polynucleotides has been investigated by Ferris and coworkers. Using the 5-phosphorimidazolide of adenine (ImpA) as the activated RNA monomer, Ferris and Ertem (1993) were able to obtain oligomers containing 6−14 monomer units in the presence of montmorillonite [54]. The formation of RNA oligomers, however, is but the first step towards preparing RNA with more than 40 monomers that are theoretically required for the initiation of the RNA world. Long-chain (elongated) RNA can be obtained using the “feeding” procedure; that is, by daily addition of ImpA to the decanucleotide (10-mer primer) adsorbed to Na-montmorillonite. Polynucleotides containing more than 50-mers are formed after 14 feedings although the principal products contain 20–40 monomer units [55]. Using activated adenosine-, uridine-, guanosine- or cytosine-5’-phospho-1-methyladenine, Joshi et al. (2009) obtained the corresponding 40 to 50-mers [56].
Lipids make up part of the living cell (Table 4). In water lipids form a micelle structure where that the outer hydrophilic part is in contact with water, and the hydrophobic part is turned inside (Figure 5). The cell wall has a trans-membrane protein through which nutrients enter the cell.
Micelle structure. Hydrophilic group: phospate group, choline group, phosphocholine group etc. Hydrophobic group: stearate, oleate, linoleiate etc.
Clay minerals might function as a primordial cell [4]. When clay minerals are deposited on the ocean floor (or dried), the particles form a pile, enclosing small spaces (Figure 6). It is conceivable that the small spaces behave like cells. Further, when clay minerals are dispersed in water, bubbles form in water or the surface of water, while the clay particles gather at the boundary between water and air, as shown in Figure 7 [57]. In such a case, clay minerals make a cell-like spherule.
Schematic figure of the room (green) to function like the cell. Clay mineral layers were dispersed in water and then dry water but small rooms play the role like the cell [4].
Schematic figure of a bubble shape sheet clay mineral micelle [57].
Unlike surfactants, lipids are difficult to synthesize. Surfactants may transform into lipids. Apatite has been reported to be capable of catalyzing the formation of a proto-lipid [58].
This article describes the role of clay minerals in chemical evolution although various other materials in the early Earth would have participated in the formation of life-like structures. Most experiments related to the origins of life on Earth use specific clay minerals, such as montmorillonite and kaolinite. Volcanic rocks from the magma ocean would be enriched in Mg2+ ions. On this basis, we have investigated the interactions of Mg-rich clay minerals (e.g., talc, serpentine) with organic molecules, including bio-organic compounds. It is further suggested that the atmosphere of the early Earth contained little oxygen. This condition would be conducive to the formation of Fe2+-rich clay minerals which, therefore, might have played an important part in the synthesis of simple bio-organic molecules.
Besides being able to concentrate organic molecules, clay minerals can also control the surface arrangement of adsorbed nucleic acid bases or amino acids. By using a mixture of different clay mineral species, it may be possible to select a given bio-molecule over another for adsorption and polymerization. Although there is an element of trial and error in investigating the role of clay minerals in chemical evolution and the origins of life, we may yet be surprised by the outcome.
We thank the editor Dr. M. Valaskova and the co-editor Dr. G. S. Martynkova for a chance to write this review. We also thank Dr. B. K. G. Theng (Landcare Research, New Zealand) for useful discussions and polishing English.
Human is a social being, which occupies in different ways to survive. Occupations are all of the daily activities in one’s life that make him who he is. Occupations are formed by cultural backgrounds and include all the tasks performed to fulfill the time and give life meaning. Occupational therapy is a treatment option for individuals with physical, mental or developmental conditions that focus on health and well-being by using meaningful and purposeful occupations for individuals for the development, improvement or maintenance of the essential skills needed to be successful in their environment [1].
\nForensic occupational therapy refers the occupational therapy service that assesses and makes interventions to the individuals with occupational problems in the criminal justice system [2]. The forensic settings can be variable and be challenging, but the main point here to pay attention is the holistic and humanistic view of occupational therapy which says that occupation is vital for human and is essential for health and well-being. From this view, forensic occupational therapy is the same as the mental health occupational therapy practice in some ways [3]. The main difference is the legal context and the restrictive correctional environment. The legal context is usually built upon deprivation of some occupations, and this alienates the individual to the occupation. Also, labeling and stigma affect reintegration to the community [4].
\nIn terms of the individual, occupational therapy is an important necessity for occupational participation and occupational balance. With these, occupational therapy prepares the person for community life and protects the individual from recidivism [5]. This is not the sole benefit of occupational therapy. Also, there are benefits for the community; reducing crime provides social well-being and also increases social welfare by contributing to the individual’s productivity activities, so that, forensic occupational therapy has dual aim both for the individual and the community.
\nThe forensic population is growing all over the world and brings challenges with this growing population [5, 6, 7, 8]. These challenges can depend on the person, environment and/or activity. The thing that should never be ignored is the legal context, and the therapists must consider the needs of individuals in the legal context [9].
\nOffenders’ rehabilitation is a multidisciplinary teamwork, and occupational therapy is a key part of the treatment and rehabilitation. The methods are similar to other mental health settings. The key focuses for the occupational therapists working in forensic settings are assessment, prevention of occupational deprivation, development of occupations to prevent recidivism, preparation for discharge and activities of daily living (ADLs), preparation to community and the vocational rehabilitation.
\nThis chapter describes the occupational therapy in forensic settings such as prisons, secure hospitals and community reintegration services. The chapter also discusses the assessments, models that can be used in forensic settings, interventions and challenges in forensic settings.
\nCorrectional administration is the reinstatement and retraining of a person’s antisocial behavior and feelings through confinement for treatment purposes. Correctional settings regulate the individual’s psychosocial status and provide health care service for the prisoners [10].
\nCorrectional settings are a way to facilitate the mental health recovery of the inmates. Since, many of the inmates have serious mental disorders, the forensic unit, of the correctional facility, plays an important part in their recovery. The unit reduces the risk associated with the inmates and facilitates their transition into the community or less restricted settings. However, the same results could be achieved with occupational therapists. The two main methods that are adopted by occupational therapists (OTs) are the reduction of occupation deprivation and increasing skills by occupational participation. Hence, the inmates are provided with an opportunity to play a purposeful and meaningful occupation in society [3].
\nPatients, who are admitted to the forensic units and get in contact with the criminal justice system as a consequence of their committed crimes, are detained in accordance with the country-specific mental health legislation. However, some patients are admitted due to severe behavioral issues.
\nThere are several types of correctional settings where charged offenders are held. The main institutions are forensic mental health settings, jails and prisons. Forensic mental health settings include the following: high secure units, medium secure units, low secure units, psychiatric/acute mental health units, community, forensic hostel, special hospital, acute unit of a forensic hospital, high-security section of a forensic hospital, sub-acute unit of a forensic hospital, consultation/liaison position in the community sector, tertiary mental health facility, extended forensic/psychiatric safe care and medium to high secure unit [11].
\nJails and prisons are the main correctional facilities since they are able to hold the greatest number of people. There are approximately 12 million jail admissions, which is approximately 19 times that of state and federal prisons [12].
\nJails and prisons served for different purposes; have restricted opportunities for rehabilitation; offer a similar grade of occupational deprivation, inadequate access to health services and poorly planned methods; are temporary in nature and lack systematic regulation and resources [13].
\nJails and prisons provide care for mentally disturbed offenders in ill-equipped correctional institutions. In particular, jails are used for temporary confinement and are usually lacking in mental health screenings and treatment received by inmates in jails is more limited. Prisons, however, might offer inmates the opportunity to access consulting service for substance abuse treatment even though the service delivery is generally insufficient [14].
\nJails serve as an introduction to the incarceration system. They are local correctional facilities operated by a city or country instead of the federal or state government. The main purpose of jails and prisoner distribution centers is to confine a person before and after court judgments and to filter prisoners to and from courts and other correctional facilities. Some people in jails have been sentenced, while others might be waiting to be convicted. Many individuals receive an imprisonment of less than 2 years [3].
\nJudgment is mostly a complex process of sentencing. In this respect, inmates in forensic settings might either be arraigned or experiencing the trial process.
\nPrisons are classified as high, medium and low security institutions that are typically used for convicted criminals who have been sentenced to at least a year of imprisonment in U.S. Federal Bureau of Prisons. In addition, depending on the severity of the crime, some individuals are sentenced to either state or federal prisons. However, compared to jails, prisons offer a far more stable environment for the inmates and restrict their interaction with society for longer periods of time [3].
\nThe primary purpose of prisons is to ensure public safety and the security of inmates. In addition to incarcerating criminals, prisons offer them programs to address their criminogenic needs related to education, substance abuse, employment and transition to the community.
\nBasic services in prisons involve intake and screening of psychotropic medicines and to provide occupational therapy services. Those services are substantially provided for prisoners to decrease their social isolation and increase their problem solving and adaptation skills, self-efficacy and self-esteem. The occupational therapy services also promote emotional regulation abilities and social and emotional skills in order for the inmate to deal with prison life and take this opportunity to improve on self-efficacy and occupational engagement [15].
High-security units: Individuals classified as high risk to public safety have been sentenced to life imprisonment and are receiving long term treatment, are housed in high-security prisons. The physical environment in these facilities consists of a number of physical and structural barriers between the facilities and the external environment of the institution.
In high-security prisons with highest number of staff, and both multiple and single cells, criminals remain in their cells or in an outer cage in the facilities’ yard. Each cell is equipped with a toilet, screwed to its floor, and prisoners are permitted up to three 10-min showers per week. Movement is firmly restricted and activity within the cellblock does not occur without other constraints, such as handcuffs, leg irons and corrective officer escorts [3]. Orientation can be considered as essential because it gives the staff the chance to be acquainted with the prisoners. The ward program focus areas, such as improving awareness of self, others and the environment; orientation to time, place and situation; probing cognitive abilities and teaching of new skills to improve leisure time use and psychomotor activation, should be maintained after discharge [16].
Medium-security prisons: Those institutions house individuals with a criminal background and requiring 2–5 years of treatment [17]. Medium-security prisons, where prisoners’ accessibility to prison gardens and exercise areas, libraries, showers and health services are high, offer far more opportunities in terms of interaction, movement and activity in-between prisoners [3]. Medium-security prisons usually have a wide diversity of work-oriented and treatment programs. Parole is more frequently granted in medium-security prisons and may be classified as supervised (always less than 1 h), limited (sent to wards for only 1 or 2 h), occupational therapy parole (join structured activities or subcontract work) and unlimited parole (mostly on weekends and during the week when they do not join specific rehabilitation activities).
Patients included in the rehabilitation process are integrated into community life by developing intellectual and emotional insight, self-care and self-expression skills and general work abilities. Furthermore, providing stress and anger management, psychoeducation and prevention programs for substance abuse in psychoeducation groups facilitates the patients/inmates return to society [16].
Low-security prisons: These facilities have windows and open spaces that allow the prisoners to move and interact freely within the environment. Even though low-security prisons are surrounded by double-rings, they have no prison fences or other secured perimeter and are often unpatrolled by armed guards. Since the inmates might work on agriculture, transport or conservation projects, they can provide training to the prison’s staff; in addition to meeting the labor force needs of other institutions [3].
In open wards (low or minimum-security prisons), during the therapeutic leave and discharge periods, greater priority is given to preparation of patient participation. Patients are expected to adhere to hospital rules and regulations, but are allowed to freely leave their wards and take the opportunity to practice skills acquired in the medium secure wards and joining educational training programs outside the health services [3].
The intensive life skills training program is comprised of communication, conflict management and criticism handling, problem-solving, money handling (budgeting, current price trends) and work-related skills (job seeking, application for a job, writing of curriculum vitae, work interviews through the use of role play). In addition, recreational activity program, and specific work skills-related programs are implemented to enhance psychosocial interactions [15, 16].
\nForensic psychiatric settings are generally located in secure units that rehabilitate individuals deemed unfit to stand trial or not criminally responsible. Those inmates pose a serious threat to either themselves or others because of severe mental illness. A forensic psychiatric setting provides treatment-based approaches with a view to rehabilitating patients while keeping the public safe. Patients, temporarily transferred from correctional facilities or incarcerated environment, are assessed and treated for mental illness in the facility that consists of secure, closed and open common units [17].
\nForensic psychiatric hospitals reintegrate patients systematically into the community with well-equipped and specialized clinical services, as well as an exhaustive range of vocational and rehabilitative programs. Treatment is typically long-term, in order to improve and safely stabilize patients’ mental well-being.
\nReentry centers are facilities that help inmates by offering structured and supervised residential settings just before or after their release. In addition to providing a permanent residence to the individuals, assistance in financial management and facilitating, their return to the society is also arranged. These centers might be especially useful, because the psychological adaptation required for offenders, with expansive criminal histories, returning to the community after a long period of imprisonment, can be particularly demanding.
\nA crucial component of community reentry centers is substance abuse management and mental health treatment and counseling. Growing prison populations are largely due to drug-related crime and drug abuse, but relatively few prisoners receive the appropriate treatment. In this respect, community-based correctional settings have launched out prison-based drug treatment programs during the past few years [3].
\nThere are two main models of psychology about correctional treatment. The risk, need and responsivity model (RNR model) was built up by Andrews and Bonta, and they describe the criminal risk variables named ‘central eight’ (Tables 1) [18]. Good lives model (GLM) is the other model which claims, that rather than addressing criminogenic needs, the focus of treatment should be on the enhancement offenders’ abilities to obtain primary human goods [19]. Purvis describes 11 primary human goods (Tables 2) [20].
\n1. History of antisocial behavior: If there is an early involvement in antisocial acts and if they are still continuing, it is a big risk variable. | \n
2. Antisocial personality: Adventurous, pleasure-seeking, poor self-control personality pattern are other risk factors. | \n
3. Antisocial cognition: Attitudes, values and beliefs supporting crime cause a personal identity favorable to crime. | \n
4. Antisocial associates: Quality of relationship affects the behavior. So that, having close association with criminal peers and relative isolation from prosocial others because of either the individual or the community affects the criminal behavior. | \n
5. Family/marital: Problematic circumstances of home, lack of nurturing relationship and/or poor monitoring behavior. | \n
6. School/work: Circumstances such as low levels of performance and satisfaction in school or work | \n
7. Leisure/recreation: Low levels of involvement and satisfaction in prosocial activities such as leisure time activities | \n
8. Substance abuse: Abuse of alcohol or drugs affects the criminal behaviors. | \n
The ‘central eight’ criminal risk variables.
1. Life (including healthy living and optimal physical functioning, sexual satisfaction) | \n
2. Knowledge(how well informed one feels about things that are important to them) | \n
3. Excellence in work (including mastery experiences) | \n
4. Excellence in play (hobbies and recreational pursuits) | \n
5. Excellence in agency (autonomy and self-directedness) | \n
6. Inner peace (freedom from emotional turmoil and stress) | \n
7. Relatedness (including intimate, romantic and family relationships) | \n
8. Community (connection to wider social groups) | \n
9. Spirituality (in the broad sense of finding meaning and purpose in life) | \n
10. Pleasure (feeling good in the here and now) | \n
11. Creativity (expressing oneself through alternative forms) | \n
The ‘primary human goods’.
If it is examined the models, both are similar, but RNR Model is based on cognitive-behavioral and the GLM is based on humanistic philosophy. The GLM identifies 11 ‘primary human goods’ and RNR identifies ‘central eight’ which are inverse overlap. It can be said that GLM ‘primary human goods’ are inverse restatements of the ‘central eight’ risk factors, viewed from the lens of humanistic psychology [19]. Depending on these criminal risk factors, it is argued that the criminal procedure of the individual can be predicted and therefore the criminal procedure can be prevented by taking the necessary precautions. However, the RNR model is not compatible with occupational therapy outlook in the view of the possibility of irreversible risk factors and bias holding against the individual.
\nThe use of occupational therapy models in forensic rehabilitation focus on client-centered, holistic and occupation-focused practice with the approach of clinical reasoning based on individual preferences and needs. Normally, individuals engage in occupations which they prefer or want throughout their life; however, in secure environment situations, this ability of the individual can be limited or can be restricted by the individual’s mental health/disorder/learning disability, their perceived and their actual risks to themselves or others and institutional regulations, policies or legal restrictions. Individuals who need forensic rehabilitation face some participation limitations to all or a combination of activities and this can cause occupational deprivation additionally to the sense of hopelessness and poor mental health [6, 11, 15]. Moreover, community life skills and performing daily living activities and interaction with the environment of the individual can be limited. Therefore, group or individual occupational therapy programs often target basic living skills, self-care, vocational skills, adaptive coping strategies, creative arts and anger or stress management. The general aim of occupational therapy is to enable individual to experience occupational enrichment and achieve optimal occupational functioning. Occupational enrichment in forensic settings can be considered as both the goal and process of occupational therapy interventions, so evidence-based practice is very important [15].
\nOccupational therapy guideline recommendations show that Model of Human Occupation (MOHO) and its associated assessments are the most used occupational therapy model in forensic occupational therapy. The model was developed in the 1980s by Professor Gary Kielhofner and has had some revisions and collaborations until now. MOHO supports that human occupation is motivated, patterned and performed. Humans are conceptualized as three interrelated components: volition, habituation and performance capacity [16]. Also, environmental considerations are very important to increase the occupational participation of the individual having forensic occupational therapy and rehabilitation [15].
\nVolition presents the individual’s motivation for occupation and relates to individual’s motivation to participate to occupations combined with their self-belief and capacity to succeed which means personal causation. Motivation and personal causation can be affected by the individual’s mental health (such as depression, schizophrenia, personality disorder) or their perception of the reason and need for their admission. Therefore, the literature supports that it is important to establish the individual’s own goals to ensure treatment readiness. Some individuals can have complex occupational histories, which are situated within social tensions related to their antisocial or criminal occupations present lack of motivation to engage and participate activities they want and these individuals can view the environment as a barrier to participation in usual activities which can impact the individual’s mental health and well-being negatively. It is supported that volitional problems are likely to be highly relevant in the secure setting which can cause decrease in personal causation, difficulty in identifying or having unrealistic goals and an inability to and meaning or interest in activities [15, 16].
\nOccupational therapists have the skills and expertise to assess and engage people in those occupations which are meaningful and motivating. This requires a careful understanding and appreciation of what underlies the motivation and creating occupational opportunities like self-care, productivity and recreational activities. Occupational therapists also help people to identify and achieve their own hopes and aspirations such as vocational rehabilitation and work skills [15, 16].
\nHabituation refers the individual’s roles and behavior patterns consistent with his/her lifestyle. It presents automatically and effectively doing routine tasks related to their environment. Roles of the individual are responsibilities of the individual associated with personal identity, occupations and activities of daily life and extraordinary occupations. Individual with criminal lifestyles can have problems on participating prosocial roles with their daily routines and occupations [15, 16].
\nOccupational therapy interventions in secure environments help individual to participate in prosocial roles and occupations in an effort to live within society without resorting to previous criminal or new antisocial behaviors. The imposed legal and security restrictions in secure environments can mean that patients are unable to participate in their habitual or chosen occupations; this may be because such occupations are antisocial, or due to lack of resources, facilities or particular environments being available in secure settings. Often patients benefit from the structure, stability and consistency of admission [19].
\nFor occupational therapy interventions age, ethnicity and culture, finding the ‘right’ occupations that are culturally relevant, risk-managed and appropriate to the ‘typical’ forensic population can be challenging. The literature supports that not only redesigning lifestyle but also technological advances have an impact on the range of occupations that occupational therapist is able to offer to extend the inclusion level of the individual such as contemporary videogames and Nintendo® WiiTM additionally to participating actual sports and recreation activities [16].
\nAccording to the Model of Human Occupation, performance capacity is related to an individual’s adaptive interaction with the environment, and the ability to do activities provided by physical and mental components and the associated subjective experience. Occupationally restricted individuals have problems with occupational performance skills for independence in daily living. Moreover, performance skills may not be acquired or learned during transition from child to adult. Occupational therapists in secure environments have a major role to play in helping patients to develop, maintain or acquire new skills for successful community reintegration or transition to less secure settings, for example in the area of vocational rehabilitation. Occupational therapists can guide individuals to identify possible vocational areas such as study/education, voluntary or paid employment [16, 20, 21].
\nOccupational therapy interventions should help the individual to identify prevocational needs and sometimes individuals have not been or will not have a productive activity like working again and therefore the therapists need to help them to establish different prosocial, productive and meaningful occupations to increase health, wellbeing, occupational performance and general quality of life. For these reasons, it is important for occupational therapists to measure and follow the progress of the individual with outcome measures during daily living activities [17, 18, 21].
\nSocial and physical isolation of the individuals can cause problems to access their own complex occupational and environmental worlds. Being cut from own life can cause limitations over occupational choices and experience, so environmental changes and supports during activity performance can provide opportunities, constraints and demands to the individual. The literature supports that individuals in secure environments spend much of their time in passive leisure, personal care and rest occupations and occupational therapists are one of the core elements in increasing activity participation of the individual and develop occupations of their choice [15, 16]. Also, occupational therapists can facilitate the exploration of new or unknown occupations to increase positive life experiences of the individual.
\nAs it is given earlier, there is a great model need to understand the volition, habituation, performance skills, physical and social environments in which an individual’s occupation takes place. MOHO assists the understanding of occupation(s) and problems of occupation that occur in terms of volition, habituation, performance capacity and environmental context. This system-based model includes well-designed assessments, observational, self-report and interview schedules. One of the advantages of this model is that because of its extensive use in mental health settings; a forensic version of an assessment tool ‘Occupational Circumstances Assessment and Interview and Rating Scale’ was designed. But, the literature also supports that this tool is not the only one for the use of occupational therapists, and occupational therapists may find any particular model, or standardized assessment/outcome measures to support their interventions [4, 15, 16, 21, 22].The literature supports that the use of occupational therapy models in forensic mental health may increase evidence-based practice and help the professionals to show the effect of occupational therapy. As Model of Human Occupation is seen to be the most used occupational therapy model, models including environmental and individual issues such as psychological issues, desires, wants, activity performance and satisfaction from the activity performance can help the occupational therapist to plan more effective assessments and interventions. Although the literature is still limited; different occupational models such as KAWA model, creative ability model, PEOP (Person, environment, occupation, performance), the Canadian model of occupational performance and engagement and the individual placement and support model with can be effectively used with standardized assessments and outcome measures in various individuals, situations, cultures and environments in provision of occupational therapy services in a cost-effective way [6, 15, 16].
\nOccupational therapy process commences with contiguity between the offender and occupational therapy service. Collecting information about the person and making special evaluations is the first step in this process. Gathering information about the individual and special assessments helps to determine the problems and needs, as well as the reason for the intervention. It also allows for the setting of intervention targets and the determination of the intervention plan. In the process of occupational therapy, the intervention plan is followed by the implementation of the intervention. The intermediate evaluation may be needed to determine the effectiveness of the intervention or to reveal new intervention goals and plans. After intervention plans that have been modified or reorganized after the interim evaluation are applied, the intervention is assessed. As seen in the abovementioned occupational therapies process, information gathering and evaluation also play an important role in the intervention for forensic occupational therapy applications. In summary, an occupational therapist working with prisoners should use a three-stage assessment of initial assessment, interim evaluation and outcome measurement during the occupational therapy intervention process [15, 21].
\nOccupational therapy sees people as active and social entities and treats the person, his occupations and the environment holistically in order for the individual to achieve or regain well-being. It is also important to assess the individual as a whole in the information gathering and evaluation process for the creation of a suitable intervention plan [15] . According to the occupational therapy reference frame written by AOTA [15], personal factors include the individual’s values, interests, and spirituality as well as body structure and functions. Having knowledge about the boundaries and areas of internal energy in prisoners’ participation in occupations can be useful to guide activity preferences and motivation processes. The things that constitute the meaning of prisoners’ lives are values and beliefs they believe to be worth trying and taking the time. The occupational therapist in forensic setting desires recreates occupational identification of offenders who lose their roles by being isolated from the social environment. For this reason, it is very important to understand the value, relevance, strengths and limitations of the individual [4, 16, 22].
\nIt is also necessary to assess the sensory, motor and cognitive skills involved in the body structure and functions of the person in need to meet the occupation requirements they wish to perform. These skills can make or break an individual’s daily life. One point that should not be overlooked here is that during the process of occupational therapy collecting and evaluating information, the prisoner does not play a passive role, so the occupational therapist does not seem to be running a process alone. The occupational therapist and the prisoner are in the business association during the presentation of information, evaluation and outcome measures, and the prisoner is actively involved in this process.
\nOccupational therapists are aware that the occupational performance of an individual is influenced by factors related to the individual as well as by the performance patterns and the environment. Roles, routines, rituals, and habits constitute performance patterns [15]. Routines and habits allow the individual to perform his/her daily activities without thinking about how to move, without trying to remember. Occupational therapists working in forensic health services care about whether the prisoner has useful habits and routines for him. It is necessary to know how individuals spend their days and which routines they create from day to guide to get new routines and habits to use the time and energy more efficiently when the living conditions change [11]. Roles are the whole of the behaviors that an individual imposes on his/her responsibility, which is imposed by the environment and culture. Rituals are symbolic behaviors that are understood by social, cultural and spiritual values that shape the occupational identity of the individual. During the evaluations, the roles of the prisoner and the importance of these roles and the determination of meaningful rituals in the individual’s life provide significant benefits for the therapist’s intervention plan. Changes in location and time can also cause changes in the roles and rituals of individuals. The change in the role and ritual of the individual after conviction can cause occupational alienation in the individual. In the context of a forensic health service, acquisition of the prisoner’s new skills and habits, and the new roles and rituals that are well integrated with the environment make an important contribution to the occupational balance of the individual [3, 16, 23].
\nUnderstanding the environments in which occupational performance takes place, it is important for occupational therapists to understand the underlying effects of occupational participation. The environment includes dimensions related to physical, social (including individuals in the individual’s life) and policies, and at the same time creates a supportive or restrictive effect for the occupational adaptation of the individual. Situations such as an absence of freedom for the individual, individual secrecy, and the meaningful and socially acceptable occupations constitute a barrier to prisoners’ participation in their environment and occupation [15, 24]. Occupational therapists should also be thoroughly evaluating the environment of individuals who are establishing an intervention plan with prisoners applying to the occupational therapy service.
\nWe have already mentioned the preferred models for forensic occupational therapy applications. MOHO, one of these theories, includes structured and unstructured assessment and information gathering tools [3, 4, 11] for collecting and evaluating information about offenders. Some of those:
Occupational performance history interview (OPHI II)—A semi-structured measure of self-care and information about the individual’s life history;
Assessment of communication and interaction skills (ACIS)—evaluates three subdomain individuals, including the physical dimension of communication, information exchange, and relationships, in an occupational pattern or in a social group [25];
The Model of Human Occupation Screening Tool (MOHOST)—gives the client a holistic view of his or her motivation to achieve occupation, communication and interaction skills, occupation patterns and the individual’s process and motor skills as well as the environment. MOHOST also allows a highly effective assessment of the effectiveness of occupational therapy interventions [26];
Occupational Self-Assessment (OSA)—a method of assessment that reveals how the individual focuses on the occupational competence of the individual about his/her occupational adaptation, helping to shape the needs and values of the individual. OSA is a highly recommended assessment tool for evaluating forensic occupational therapy. Individuals are given a very wide list of daily occupations, individualists are asked to evaluate the occupations in their own eyes and the level of their own performance [26];
Occupational circumstances assessment interview and rating scale (OCAIRS-Forensic Mental Health Version)—the therapist has extensive content to get detailed information about the offender. It gives the individual an accurate and holistic view of occupational functionality. If the more fully involved the offender is in the evaluation process, the higher the participation in intervention practices [27, 28].
Evaluations such as Canadian occupational performance measurement, assessment of motor and process skill, independent living scale, and the role checklist are other measures preferred by occupational therapists [3, 24].
\nAnother assessment heading in the forensic occupational therapy process is risk assessment. When considering the evaluation processes mentioned earlier, a prisoner who has forensic settings should be considered as a means of risk assessment to determine the potential for another crime or previous crime. Occupational therapists take into account the risk assessment and management of risks posed by each client and to increase the occupational involvement of individuals by taking environmental precautions and managing them to manage risks in environments such as high-risk kitchens and workshops to improve individual skills as well as providing positive risk-taking opportunities to enhance the capabilities of both individuals.
\nCurrent risk factors such as age and gender, substance use status, criminal history and potential risk factors such as marital status, occupational participation level in the forensic setting, family support should be considered in the risk assessment. Occupational therapists pay attention to the influence of the person-environment-occupation interaction on the occupational adaptation of the individual. Occupational therapists can estimate the effects of individual’s personality and sociodemographic characteristics (physical, cognitive and psychological), their level of skill and the environmental risk factors, including interpersonal interaction, social support network, hospice environment, social security status on the possible risk factors. For this reason, they may play an active role in providing counseling to minimize the risks faced by prisoners and these risks’ adverse effects on occupational adaptation [3, 21].
\nAs already mentioned, offender rehabilitation in forensic settings is not different from other mental services. Intervention methods used by occupational therapists must include life skills development (such as ADLs, IADLs, and health management), occupational development, awareness (such as self-awareness and social awareness), self-management, skill-building (such as social, relationship, vocational skills), education etc.
\nThe GLM is a model that overlaps the humanistic point of view of occupational therapy. Although the GLM is a psychology-based model, it supports occupational therapies’ application models such as PEO, MOHO, CMOP and role acquisition model. Occupational therapists may develop interventions taking into account the GLM’s the primary human goods components. Some intervention recommendations based on the ‘primary human goods’ are given in Table 3.
Life: Life skills training is a commonly used occupational therapy intervention in mental health [30]. Offenders are at a higher risk for poverty, unemployment and difficulties in relationships. The life skills training interventions can focus on self-care, self-maintenance, intrinsic gratification, social contribution and interpersonal relatedness skills. The interventions must be client centered and the context must be well evaluated. While working with an offender, the balance of daily occupations should be kept in mind for a healthy lifestyle.
Knowledge: The development of interventions for improving self-awareness is very important in offenders’ rehabilitation. Self-awareness is the ability to recognize him/herself as an individual who is different from other individuals. Self-awareness is having a clear perception of personality, including strengths, weaknesses, thoughts, beliefs, motivation and emotions. The aim of the interventions is to gain a sense of self-worth. Facilitatory interventions, such as education, feedback, behavior therapy and psychotherapy have been recommended to a greater extent than compensatory interventions.
Excellence in work: The main problem of ex-offenders is employment to maintain their lives [31]. Unemployment concerns begin to increase still they are in prison. They face substantial barriers to many types of legal employment [32]. These barriers are poor basic skills, low self-esteem, a lack of recent work experience, employer discrimination, behavioral and health problems. Interventions must include prevocational training, job search skills, work-related practice and also work hardening.
Excellence in play: Recreational activities and hobbies are the enjoyable, activities that are restorative in which the clients’ choice and control often associated with leisure time. Recreational pursuits and hobbies are the power of life. The main aim of the therapeutic recreation is to enhance the patient’s quality of life and ability to participate in leisure and/or play. Also, it can improve social participation and social skills which is very important for the offenders.
Excellence in agency: Self-directedness is the ability to organize and adapt a behavior to achieve individual selected goals and values. Self-directedness includes the concept of an autonomous individual and concepts of personal integrity, self-respect, dignity, efficacy and feelings about one’s life [33].
Inner peace: Anger management problems affect all parts of a persons’ life. The goals of treatment are to increase the client’s resources for coping with stress and try to decrease the demands made on the client. Treatment is first achieved by increasing awareness of the client about the relationship between anger and stress and then increasing the effective use of the stress management techniques that the client is able to cope with [11, 34]. Anger management interventions begin with recognizing the triggers of anger. The client must take responsibility for his/her own change so that the problem can be solved. The second stage of the intervention is the awareness of the behaviors when the client is angry, such as, shouting, swearing, treating verbal, postural or gestures, abusive behaviors such as phone calls, messaging or other communication ways, harassments, emotional abuses or violent. Also in this stage, the therapist must help the client to identify times when his/her thoughts do not lead to logical or rational conclusions. The third stage is teaching specific skills to help the client to manage triggers for anger effectively, such as relaxation techniques, mindfulness and assertiveness.
Relatedness: Group interventions in which the family members and friends are engaged are suitable for relatedness [35]. The aim of the interventions must be establishing and maintaining relationships with others, resisting inappropriate social pressure, working in cooperation, preventing and resolving interpersonal conflict, asking for help when necessary [29].
Community: Deficits in social skills are often seen in forensic groups. Social skills training is the main intervention method for being active in a group [36]. For being in a group, it is also important to make responsible decision to identify and evaluate the problems correctly, making decisions based on ethical and social norms, to evaluate decisions in context, contribute to the welfare of society, accurately identify and evaluate problems, make decisions based on ethical and social norms, consider context in decisions, contribute to well-being of community [29]. Social skills training consists of learning activities that use behavioral techniques that enable individuals to acquire independent life skills for better functioning in their communities. Direct teaching, modeling, role playing, behavior rehearsal, and social reinforcement can be used during the interventions.
Spirituality: The spirituality is the ‘meaning and purpose in life, the life force or integrating aspect of the person and transcendence or connectedness unrelated to belief in a higher being’ in occupational therapy perspective [37] . The meaning of spirituality is different for everyone, can be participating a religion, visiting religious places (such as churches, mosques, synagogues etc.) regularly and can be different for some praying alone, yoga, meditation, being in the nature, walking and so on. There can be challenges about talking about the beliefs and spirituality with the client and that much of spiritual experience can be culturally influenced [37]. Motivation techniques can be used to find meaning and purpose in life.
Pleasure: Pleasure is one of the subjective experiences of the human need-based experiences to engage in occupations [38]. It influences productivity, restoration and being active to engage occupations [39]. Motivational and increasing self-esteem and confidence interventions can be used to improve pleasure.
Creativity: It is stated that ‘creativity is part of everyday practice; the use of creativity as a conscious approach; creativity involves risk-taking; creativity needs a supportive environment; and creativity is the use of expressive arts in therapy’ [40]. Especially creative arts increase the capacities of offenders, help to explore their own resources, assist them to locate hope and motivation, recognize their interconnectedness with others without external pressure to comply [41].
The ‘primary human goods’ | \nIntervention recommendations | \n
---|---|
1. Life (including healthy living and optimal physical functioning, sexual satisfaction) | \nAim: Understand themselves, reach personal satisfaction, live life better and achieve their goals Occupational strategies: Functional life skills Role development Independent living skills Literacy and education ADLs IADLs Health management Gender-specific issues Money management | \n
2. Knowledge (how well informed one feels about things that are important to them) | \nAim: Identify one’s emotions, thoughts, interests, and values; understand how internal characteristics influence actions; maintain a sense of self-confidence and self-efficacy Occupational strategies: Self-awareness Drug and alcohol awareness | \n
3. Excellence in work (including mastery experiences) | \nAim: To keep the physical, psychological and social needs of the individual together, to increase the independence of the individual and to work with a holistic and customer-centric approach in the role of the worker. Occupational strategies: Prevocational training Job search skills Work-related practice Vocational rehabilitation: work preparation, voluntary and paid work Work hardening | \n
4. Excellence in play (hobbies and recreational pursuits) | \nAim: To build up hobbies, recreational pursuits Occupational strategies: Recreational skills Time management | \n
5. Excellence in agency (autonomy and self-directedness) | \nAim: To organize and adapt a behavior to achieve individually selected goals and values Occupational strategies: Anger management Stress management Problem solving skills Motivation | \n
6. Inner peace (freedom from emotional turmoil and stress) | \nAim: Regulate emotions, thoughts and behaviors across contexts; cope with stress and manage impulses; set goals Occupational strategies: Self-management Increase self-esteem and confidence by promoting personal responsibility | \n
7. Relatedness (including intimate, romantic and family relationships) | \nAim: Establishing and maintaining relationships with others; resisting inappropriate social pressure; working in cooperation; preventing and resolving interpersonal conflict; asking for help when necessary [29]. Occupational strategies: Relationship skills Complex relationship building Facilitating development of supportive relationships Social skills | \n
8. Community (connection to wider social groups) | \nAim: Being active in social groups Occupational strategies: Social skills Social awareness Responsible decision-making Graded community engagement and one-to-one goal planning Empathy | \n
9. Spirituality (in the broad sense of finding meaning and purpose in life) | \nAim: To find meaning and purpose of life Occupational strategies: Motivation | \n
10. Pleasure (feeling good in the here and now) | \nAim: Feeling good, loving life Occupational strategies: Motivation Increase self-esteem and confidence | \n
11. Creativity (expressing oneself through alternative forms). | \nAim: Knowing himself about what he can do Occupational strategies: Skills development Vocational activities include such as woodwork, crafts, graphics, horticulture | \n
Intervention recommendations in offender’s rehabilitation from the view of occupational therapy.
The main challenge is the context because of the complexity of the rules affecting the freedom of the offender and the occupational opportunities [7]. The heterogeneous client population is another challenging condition with in the context. Restricted daily living activities cause the loss of control and autonomy. Time use is another challenging factor, the lack of structured time use besides the loss of control and autonomy affects the client’s volitions, habits, and routines. Also, lack of opportunities for meaningful, individualized career choices for patients affects the client.
\nAlso, change, itself is a challenging condition. There are many factors that affect the daily living activities that are the volitions, habits of the individual and the environment. Therefore, it is not possible to catch the change in every environment. Even in a prison or in a secure hospital or a probation service, the offender has always an obligation and mostly a restricted occupational choice. Motivation or perceived lack of choice is an important challenge. Another challenge is the obligations dictate some occupations and this is not the individual’s choice. Occupational therapy is client-centered, but freedom deprivation is a challenge to make interventions. Occupational therapy is client-centered but freedom deprivation is a challenge to make interventions. Labeling and stigma are other challenging parts of the offenders’ participation in the occupations and the community.
\nKeeping the three justices—criminal justice, occupational justice and social justice—in a balance is the main aim of the offender’s rehabilitation and the most challenging part of the rehabilitation.
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\\n\\nAs a gold Open Access publisher, an Open Access Publishing Fee is payable on acceptance following peer review of the manuscript. In return, we provide high quality publishing services and exclusive benefits for all contributors. IntechOpen is the trusted publishing partner of over 118,000 international scientists and researchers.
\n\nThe Open Access Publishing Fee (OAPF) is payable only after your full chapter, monograph or Compacts monograph is accepted for publication.
\n\nOAPF Publishing Options
\n\n*These prices do not include Value-Added Tax (VAT). Residents of European Union countries need to add VAT based on the specific rate in their country of residence. Institutions and companies registered as VAT taxable entities in their own EU member state will not pay VAT as long as provision of the VAT registration number is made during the application process. This is made possible by the EU reverse charge method.
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