Tatiana Martins

By Wendel Alves, Wellington Alves, Camila Pinheiro Sousa, Sergio Kogikoski Jr., Rondes Ferreira Da Silva, Heliane Amaral, Michelle Silva Liberato, Vani Xavier De Oliveira Jr., Tatiana Martins and Pedro Mitsuo Takahashi

Part of the book: New Perspectives in Biosensors Technology and Applications

By Tatiana Duque Martins, Antonio Carlos Chaves Ribeiro, Henrique Santiago de Camargo, Paulo Alves da Costa Filho, Hannah Paula Mesquita Cavalcante and Diogo Lopes Dias

Part of the book: State of the Art in Biosensors

By Tatiana Duque Martins, Antonio Carlos Chaves Ribeiro, Flavio Colmati, Geovany Albino de Souza, Henrique Santiago de Camargo, Diogo Lopes Dias, Paulo Alves da Costa Filho and Diericon de Sousa Cordeiro

It is incontestable that the interactions and bonds that keep molecules united to generate unique supramolecular compounds, with individual properties, morphologies and behaviour, are of special dynamics and singular forces. Therefore, it is necessary to discuss and consider the types of interactions that may occur in a determined system, their dynamics and number, which directly act on the energetic balance that strengthen the union between participants and give rise to a supramolecule.

Part of the book: Biosensors

By Tatiana Duque Martins, Antonio Carlos Chaves Ribeiro, Geovany Albino de Souza, Diericon de Sousa Cordeiro, Ramon Miranda Silva, Flavio Colmati, Roberto Batista de Lima, Lucas Fernandes Aguiar, Leandro Lima Carvalho, Renan Gustavo Coelho S. dos Reis and Wemerson Daniel C. dos Santos

Kinetic rates of energy production are extremely controlled by the competing processes that occur in systems capable of energy transfer. Besides organic and inorganic compounds already known as electronically actives, supramolecular systems can be thought to form energy transfer complexes to efficiently convert, for instance, light into electricity and the mechanisms for that can be of any kind. Photophysical and photochemical processes can simultaneously occur in such systems to provide energy conversion, by competing mechanisms or collaborative ones. Thus, to investigate the kinetic rates of each process and to understand the dynamics of the electronic excited states population and depopulation in strategically structured materials, can offer important tools to efficiently make use of this not always so evident power of supramolecular materials. In this chapter, we present the state-of-the-art of the use of photophysical processes and photochemical changes, presented by new materials and devices to provide a control of energy transfer processes and enable distinct applications, since energy conversion to sensing and imaging techniques to material characterization.

Part of the book: Advanced Chemical Kinetics

By Flavio Colmati, Christian Gonçalves Alonso, Tatiana Duque Martins, Roberto Batista de Lima, Antonio Carlos Chaves Ribeiro, Leandro de Lima Carvalho, André Mychell Barbieux Silva Sampaio, Monah Marques Magalhães, José William Diniz Coutinho, Geovany Albino de Souza, Lucas Fernandes Aguiar, Diericon de Sousa Cordeiro, Adão Marcos Ferreira Costa, Thiago Soares Silva Ribeiro, Pedro Henrique Machado Godoy and Guilherme Botelho Meireles de Souza

This work will show an overview of the hydrogen production from ethanol by steam reforming method, using distinct catalysts, resulting in low carbon monoxide content in H2 produced; a thermodynamic analysis of reforming employing entropy maximization, the ideal condition for ethanol, and other steam reforming reactions, the state of the art of steam reforming catalysts for H2 production with low CO content. Moreover, in the second part, there will be an overview of the use of hydrogen in a proton exchange membrane fuel cell (PEMFC), the fuel cell operational conditions, a thermodynamic analysis of PEMFC, the catalysts used in the electrodes of the fuel cell, consequences of the CO presence in the hydrogen fuel feed in PEMFC, and the operation conditions for maximum output power density.

Part of the book: Advances In Hydrogen Generation Technologies

By Geovany Albino de Souza, Tatiana Duque Martins and Flavio Colmati

This chapter summarizes the fundamentals of biosensing techniques based on fluorescence spectroscopy and the protagonism of state-of-the-art luminescent biosensors in a wide range of scientific areas, from environmental monitoring to diagnostics and decease treatment, focusing on the paramount contribution of biosensors based on the Förster Resonance Energy Transfer (FRET) transducing mechanism. State-of-the-art FRET biosensors are specially characterized by outstanding sensitivity toward a number of environmental pollutants and dissolved oxygen in aquatic ecosystems, capable of detecting concentrations in the nano and picomolar scales. These biosensors have also been showing impressive performance over other methods in the study of real-time biological processes in vivo relevant to help understanding decease progression like cancer.

Part of the book: Biosensors for Environmental Monitoring

By Flavio Colmati, Lívia Flório Sgobbi, Guilhermina Ferreira Teixeira, Ramon Silva Vilela, Tatiana Duque Martins and Giovanna Oliveira Figueiredo

Biosensors are chemical sensors in which the recognition system is based on a biochemical mechanism. They perform the specific component detection in a sample through an appropriate analytical signal. Enzyme-based biosensors are the most prominent biosensors because of their high specificity and selectivity; besides being an alternative to the common immunosensors, they are more expensive and present a limited binding capacity with the antigen depending on assay conditions. This chapter approaches the use of enzymes modified electrodes in amperometric biosensing application to detect and quantify pesticides and phenolic compounds with pharmacological properties, as they have been a promising analytical tool in environmental monitoring. These biosensors may be prepared from pure enzymes or their crude extracts. Pure enzyme-based biosensors present advantages as higher substrate specificity and selectivity when compared to crude extract enzymatic biosensors; nevertheless, the enzyme high costs are their drawbacks. Enzymatic crude extract biosensors show lower specificity due to the fact that they may contain more than one type of enzyme, but they may be obtained from low-cost fabrication methods. In addition, they can contain enzyme cofactors besides using the enzyme in its natural conformation.

Part of the book: Biosensors for Environmental Monitoring

By Tatiana Ertner, Diericon Cordeiro, Ramon Miranda and Lucas Aguiar

When we think of a globalized world, whose development is based on internationalized actions, the ease of communication, access to information, cultural and commercial exchanges, and the technological development that they ignite immediately come to mind. Clearly, much is earned from internationalization; however, what is lost is rarely considered. A rigorous assessment of the changes that internationalization represents for a nation is needed in order to understand its effective costs and handle it properly. It is common sense that the main impact of internationalization is on the culture of a people. Internationalization, as a mechanism to facilitate sharing of information, products, and knowledge, certainly has an impact on cultural diversity; however, it is not always clear if it is positive or negative. Regarding intellectual property, it often influences authorship recognition and, therefore, ownership of innovative creations. Often, cultural issues affect the way in which authorship recognition occurs, especially when it comes to different ethnicities and genders. In this chapter, we will explore the aspects of intellectual property related to traditional knowledge that influence cultural and gender diversity, worldwide, evidencing their pros and cons, aiming to collaborate with public policies to bridge the gender gap and truly protect diversity.

Part of the book: Intellectual Property