Complex Chemistry
Mostrando 1-12 de 195 artigos, teses e dissertações.
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1. RECENT ADVANCES IN CYANATION REACTIONS
Transformations involving structurally complex molecules, natural products and representative molecules are extremely important to obtain key reaction intermediates, in addition to accessing molecules with bioactive properties. The development of cyanation methodologies in those molecules becomes important, because nitriles are versatile and important buildi
Química Nova. Publicado em: 2022
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2. ROBÓTICA EDUCACIONAL, ENSINO DE QUÍMICA E APRENDIZAGEM COOPERATIVA: UMA PROPOSTA PARA O CURSO DE ENSINO SUPERIOR EM ENGENHARIA CIVIL
Students, generally, are afraid of studying chemistry because they understand that it is a very complex area of knowledge and that it doesn’t has use in daily lives and in intended profession, which is a problem we identified in a Civil Engineering course. With this, we proposed a project in this course, based on educational robotics and educational cooper
Química Nova. Publicado em: 2022
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3. Dificuldades no ensino e na aprendizagem de química orgânica do ensino superior - estudo de caso em duas Universidades Federais
This research investigates difficulties associated to the curricular component Organic Chemistry I based on a study case of Chemistry undergraduate courses (Bachelor and Teachers education) in two Federal Universities in the Brazilian South region. The analytical process integrated official documents of the courses (pedagogic projects, students’ grades), q
Quím. Nova. Publicado em: 2021-06
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4. A Catalysis Guide Focusing on C–H Activation Processes
From the recent development of catalytically controlled C-H activation with amenable synthetic routes obviating many challenges, the demand for this strategy has raised significantly to perform complex organic transformations. The impact of the achieved results in both homogeneous and heterogeneous catalysis reflects its efficacy in modern synthetic chemistr
J. Braz. Chem. Soc.. Publicado em: 2021-05
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5. A HISTÓRIA DA CIÊNCIA COMO “REMÉDIO” NO ENSINO DE QUÍMICA: EPISÓDIO - ESTUDO SOBRE A INVENÇÃO DA TEORIA ATÔMICO-MOLECULAR MODERNA
In recent years, much has been said about the approach of the history of science and science teaching. We know that this approach can be made using historical episodes in science classes. In this sense, this work aims to bring a historical episode to be worked on in general chemistry classes in high school, as well as in general chemistry classes 1 of univer
Quím. Nova. Publicado em: 2020-09
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6. SYNERGISMS BETWEEN METAL AND PHOTOREDOX CATALYSIS: DECONVOLUTING COMPLEX SYSTEMS
This review briefly describes the evolution of organometallic chemistry and photoredox catalysis as independent fields; followed by a more in-depth presentation and discussion of representative examples derived from their synergistic combination, which generally leads to powerful cross-coupling protocols. In this context, the rational deconvolution of these
Quím. Nova. Publicado em: 20/07/2020
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7. RAMAN STUDIES OF BIS(PHENYLTERPYRAZINE)IRON(II) AND SUPRAMOLECULAR SPECIES WITH PENTACYANIDOFERRATE(II) IONS
The chemistry and spectroscopy of the iron(II) phenylterpyrazine complex, [Fe(phtpz)2]2+, were investigated in comparison with the analogous phenylterpyridine species, Fe(phtpy)2]2+, and the results indicated a strong electronic delocalization on the Fe(II) terimine chromophore encompassing the lateral pyrazyl groups. The delocalized nature of the molecular
Quím. Nova. Publicado em: 05/12/2019
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8. Vibrational Spectroscopy and Chemometrics in Forensic Chemistry: Critical Review, Current Trends and Challenges
The present manuscript makes an extensive review of the scientific approaches developed in the last decade involving infrared and Raman spectroscopy combined with chemometrics for solving several issues in the investigation of the most relevant forensic traces, such as questioned documents and currency, explosives, gunshot residues, illicit drugs and body fl
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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9. EL DOPAJE DEPORTIVO COMO CUESTIÓN SOCIALMENTE VIVA: UNA REVISIÓN BIBLIOGRÁFICA
This paper aims to present a review of the concept doping in scientific journals published in the period 2008 to 2018. The diversity of approaches that position doping as a socially acute question (SAQ) allow us to recognize the implications of this concept in educational contexts. The state of the art methodology seeks to reflexively recover production on t
Quím. Nova. Publicado em: 21/10/2019
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10. Argumentação de estudantes na criação e crítica de analogias sobre o Modelo Atômico de Thomson
Resumo: Neste trabalho buscamos compreender como a estratégia de criação e crítica de analogias por estudantes de Química pode favorecer o engajamento em argumentação e a aprendizagem do modelo atômico de Thomson. Foi produzida uma Unidade Didática e o desenvolvimento da mesma em uma turma de 1º ano do ensino médio foi registrado em áudio e víde
Ciênc. educ. (Bauru). Publicado em: 07/10/2019
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11. Sobre modelagem matemática e formalismos estatísticos de sistemas complexos
Resumo Os Sistemas Dinâmicos Complexos são sistemas com propriedades emergentes inesperadas resultantes de processos sinérgicos de seus componentes. Estes sistemas aparecem na física e na química e desempenham um papel fundamental em sistemas biológicos. Tais sistemas requerem um tratamento teórico em termos de “Modelagem Matemática”, com os form
Rev. Bras. Ensino Fís.. Publicado em: 09/09/2019
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12. Identification of patterns for increasing production with decision trees in sugarcane mill data
ABSTRACT: Sugarcane mills in Brazil collect a vast amount of data relating to production on an annual basis. The analysis of this type of database is complex, especially when factors relating to varieties, climate, detailed management techniques, and edaphic conditions are taken into account. The aim of this paper was to perform a decision tree analysis of a
Sci. agric. (Piracicaba, Braz.). Publicado em: 2019-07