Chemistry Substance
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. ABORDAGEM DIDÁTICA PARA O DESENVOLVIMENTO DE MOLÉCULAS BIOATIVAS: REGRA DOS CINCO DE LIPINSKI E PREPARAÇÃO DE HETEROCICLO 1,3,4-OXADIAZOL EM FORNO DE MICRO-ONDAS DOMÉSTICO
In Brazil, the development of new chemical entities (NEQ) is still limited to small advances in the academic and public research sectors, the authors understand that this is a sector of the pharmaceutical industry that needs encouragement. Accepting that education transforms society, educate students in the development of bioactive molecules, it’s a way to
Quím. Nova. Publicado em: 2018-01
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2. CRAQUEAMENTO TÉRMICO DA GLICERINA: UMA PROPOSTA DE EXPERIMENTO PARA QUÍMICA ORGÂNICA
In this work, an undergraduate organic chemistry experiment based on thermal cracking of glycerin is proposed. The reagent is obtained as a by-product from the practice of biodiesel synthesis, and allows reduction of waste produced in the lab. The main product obtained from thermal cracking was characterized by GC analysis as acrolein. This substance was
Quím. Nova. Publicado em: 2015-06
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3. Análise forense: pesquisa de drogas vegetais interferentes de testes colorimétricos para identificação dos canabinoides da maconha (Cannabis Sativa L.)
Marijuana (Cannabis sativa L.) is the most cultivated, trafficked and consumed illicit drug worldwide. Estimates indicate 10% of individuals experiencing marijuana become daily users, and 20-30% use it weekly. Around 489 natural compounds have been identified in this plant, of which 70 are cannabinoids, responsible for psychic effects. The most relevant cann
Quím. Nova. Publicado em: 2012
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4. Tratamentos químicos na emergência de sementes de guaraná.
1984
Belém. Publicado em: 2011
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5. Escarificação química na emergência de sementes de castanha-do-brasil.
1984
Belém. Publicado em: 2011
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6. Dificuldades conceituais no aprendizado de equilíbrios químicos envolvendo reações ácido-base
Common student misunderstandings regarding chemical equilibrium are reported taking into account the response of freshman students to some typical questions involving acid-base reactions. Language has been shown to be one of the main issues associated with students' difficulties on this subject, such as in the case of concentration and amount of substance (m
Química Nova. Publicado em: 2011
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7. "Sustancia" en el devenir la quimica: dime cómo te buscan y te diré que eres
Taking into account Stephen Toulmin´s approaches, we will look at some aspects in the historical development of Chemistry connected to the concept of substance. In a superficial and non-linear manner, the text tries to show some complex networks that developed between the diverse components named by Toulmin as "intellectual ecology", such as the niches of r
Ciência & Educação (Bauru). Publicado em: 2009
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8. AVALIAÇÃO TOXICOLÓGICA DE ORGANOCALCOGÊNIOS EM ERITRÓCITOS HUMANOS / TOXICOLOGICAL EVALUATION OF ORGANOCHALCOGENS IN HUMAN ERYTHROCYTES
The interest in organochalcogen chemistry, biochemistry and pharmacology has increased in the last two decades mainly due to the fact that a variety of organochalcogen compounds possess biological activity and due the use of these compounds in industrial applications. However, literature data showed that these compounds present pro-oxidant properties, causin
Publicado em: 2009
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9. Characterization of the urban solid residues of the Maceió-AL city. / Caracterização dos resíduos sólidos urbanos da cidade de Maceió-AL.
This work presents and argues the characterization of the urban solid residues generated in Maceió-AL, by means of laboratory and field assays, searching to contribute for operational improvements in the system of urban cleanness of the city. The residues had been collected monthly from routes previously defined, in the period of one year, in eight differen
Publicado em: 2008
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10. O inacreditável emprego de produtos químicos perigosos no passado
This work describes an overview of the use of chemicals in several commercial applications along the XXth century. The use of chemicals by men was largely empirical for many centuries, since there was no organized chemical and toxicological knowledge. During the XIXth century the chemical industry gained a crucial role in the development of technology, as ev
Química Nova. Publicado em: 2006-10
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11. Estudo da esterilização por plasma de acoplamento indutivo e análise comparativa com esterilização por óxido de etileno / Study of sterilization by Inductively coupled plasma and comparison with sterilization by ethilene oxyde
The gas Plasma sterilization technology has been emerging as an alternative to conventional low temperature processes since the advent of new therapies using heat sensitive materials in the healthcare field is greater than ever. The gas Plasma mechanism of action includes the generation of actives species by an electrical discharge, which is able to promote
Publicado em: 2006
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12. Aplicabilidade das argilas do município de Sapopema e Curiúva (PR) na indústria artesanal de cerâmica e suas implicações no contexto socioeconômico
The propose of this study has for objective the characterization of the clay material of the ceramist regions of the Sapopema city, in Paraná State, and the verification of the ceramic potencial of that mineral material, for commercial ends, aiming at the dynamization of the local economy in that region. Clays collected had been characterized through morpho
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/11/2005