Proof
Mostrando 13-24 de 1068 artigos, teses e dissertações.
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13. Chemically Reduced Graphene Oxide on Gold Electrodes from Recordable CDs: Characterization and Potential Sensing Applications
This work presents the development and characterization of a new chemically modified electrode exploiting recordable Au-rewritable compact discs (AuCDs) as substrate for drop casting of a chemically-reduced graphene-oxide slurry focusing on simple and low-cost electrochemical sensors. Increase in electrochemical responses in cyclic voltammetric and amperomet
J. Braz. Chem. Soc.. Publicado em: 2020-03
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14. Use of smartphone-based instant messaging services in medical practice: a cross-sectional study
ABSTRACT BACKGROUND: Instant messaging services (IMS) are widely used in medical practice. OBJECTIVE: To evaluate perceptions regarding use and usability of IMS within clinical practice and assess users’ knowledge of the ethical and legal context involved in using IMS within medical practice. DESIGN AND SETTING: Cross-sectional study conducted in dif
Sao Paulo Med. J.. Publicado em: 2020-02
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15. Microwave Assisted Ultra-Fast Method to Synthesize Carbonate-Phosphates, Na3MCO3PO4 (M = Mn, Fe, Co, Ni) - Relevant Materials Applied in Sodium-Ion Batteries
Although largely used in mobiles and electric vehicles applications, insertion batteries based on Li-ion technology are high-cost devices. These applications require high-performance energy storage systems with high-energy and high-power densities, which are better attained by Li-ion technology. However, stationary applications such as power plants and unint
J. Braz. Chem. Soc.. Publicado em: 2020-01
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16. Eclipses: revelando a vida secreta das estrelas e da natureza humana
Resumo O presente artigo é uma homenagem ao legado deixado pelo maior experimento astronômico do século XX. Os eclipses e suas multifaces são o alvo principal desse artigo. Veremos que os eclipses não somente revelam os segredos das estrelas, mas também aqueles da natureza humana. A inspiração e fascínio pelos eclipses nos tornaram capazes de prever
Rev. Bras. Ensino Fís.. Publicado em: 13/12/2019
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17. Análise da resistência de placas ósseas de acrílico fabricadas a laser quando submetidas a diferentes forças que agem sobre o foco de fratura
RESUMO Objetivou-se com este trabalho analisar a resistência de placas ósseas de acrílico, confeccionadas com cortadora a laser CO2, quando submetidas às forças que agem sobre o foco de fratura. Foram utilizados 40 fêmures de ovinos (Ovis aries) e confeccionadas 40 placas de acrílico, os quais foram avaliados em grupos: grupo OP - foram avaliados 20 o
Arq. Bras. Med. Vet. Zootec.. Publicado em: 13/12/2019
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18. Practical rules for summing the series of the Tweedie probability density function with high-precision arithmetic
Abstract: For some ranges of its parameters and arguments, the series for Tweedie probability density functions are sometimes exceedingly difficult to sum numerically. Existing numerical implementations utilizing inversion techniques and properties of stable distributions can cope with these problems, but no single one is successful in all cases. In this wor
An. Acad. Bras. Ciênc.. Publicado em: 02/12/2019
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19. Elaboration of a natural sweetener using Erythritol/Stevia
Abstract The food industry always searches for innovation, product improvement, quality and customer satisfaction. In relation to sweeteners, this search had an expressive increase in recent times due to the increase of diseases caused by the excessive consumption of sugar. Most tabletop sweeteners marketed in Brazil have bulking agents with characteristics
Food Sci. Technol. Publicado em: 28/11/2019
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20. MATERIAL CAUSE AND SYLLOGISTIC NECESSITY IN POSTERIOR ANALYTICS II 11
Abstract The paper examines Posterior Analytics II 11, 94a20-36 and makes three points. (1) The confusing formula ‘given what things, is it necessary for this to be’ [τίνων ὄντων ἀνάγκη τοῦτ᾿ εἶναι] at a21-22 introduces material cause, not syllogistic necessity. (2) When biological material necessitation is the only causal
Manuscrito. Publicado em: 25/11/2019
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21. ARISTOTLE’S ARGUMENT FROM UNIVERSAL MATHEMATICS AGAINST THE EXISTENCE OF PLATONIC FORMS
Abstract In Metaphysics M.2, 1077a9-14, Aristotle appears to argue against the existence of Platonic Forms on the basis of there being certain universal mathematical proofs which are about things that are ‘beyond’ the ordinary objects of mathematics and that cannot be identified with any of these. It is a very effective argument against Platonism, becaus
Manuscrito. Publicado em: 25/11/2019
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22. AVOIDING INFINITE REGRESS: POSTERIOR ANALYTICS I 22
Abstract This article offers a reconstruction of an argument against infinite regress formulated by Aristotle in Posterior Analytics I 22. I argue against the traditional interpretation of the chapter, according to which singular terms and summa genera, in virtue of having restrict logical roles, provide limits for predicative chains, preventing them from pr
Manuscrito. Publicado em: 07/11/2019
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23. Medicinal Electrochemistry of Halogenated and Nitrated Pterocarpanquinones
Electrochemical methods are considered useful tools for simulations of biological redox reactions. The activities of quinones depend on their bioreduction. Biologically active pterocarpanquinones LQB-149 (nitroderivative), 150 and 151 (bromo and chloroderivatives, respectively) were electrochemically investigated by cyclic voltammetry, differential pulse vol
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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24. O uso de sistemas agroflorestais diversificados na restauração florestal na Mata Atlântica
Resumo Com a nova legislação ambiental brasileira vislumbra-se a possibilidade do uso de sistemas agroflorestais diversificados para recompor áreas de preservação permanente e reserva legal, principalmente em pequenas propriedades rurais. Uma pergunta que surge, diz respeito à capacidade desses sistemas em reduzir custos na restauração florestal e, a
Ciênc. Florest.. Publicado em: 30/09/2019