Chemistry History
Mostrando 1-12 de 91 artigos, teses e dissertações.
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1. CLASSIFICAÇÃO DAS SUBSTÂNCIAS QUÍMICAS: UM CONCEITO POUCO EXPLORADO NA EDUCAÇÃO QUÍMICA
The classification of chemical substances is a concept little explored in Chemistry teaching literature and in Chemistry textbooks at higher and secondary levels. The aim of this paper is to discuss theoretically the importance and contributions of this concept for teaching and learning Chemistry. The History of Chemistry reveals that the chemical criteria f
Quím. Nova. Publicado em: 2021-04
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2. WILHELM OSTWALD PARA ALÉM DO ANTIATOMISMO
The Baltic German chemist Wilhelm Ostwald (1853-1932) had his scientific prestige eclipsed in the history of chemistry due to his rejection to atomic theory, which suggests the permanence of the whig interpretation on history of chemistry in the narratives about him. In this paper, we intend to present elements on Ostwald’s biography far from his role in t
Quím. Nova. Publicado em: 2021-02
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3. 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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4. Pseudosection modeling and U-Pb geochronology on Piranga schists: role of Brasiliano Orogeny in the Southeastern Quadrilátero Ferrífero, Minas Gerais, Brazil
ABSTRACT In the Southeastern Quadrilátero Ferrífero, a package of metapelitic rocks previously attributed to the Archean Rio das Velhas Supergroup crops out in Piranga locality. This study presents the mineral chemistry and U-Pb-Hf zircon geochronology on foliated staurolite-garnet mica schists. Garnet and staurolite index minerals are syn- to post-kinemat
Braz. J. Geol.. Publicado em: 21/10/2019
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5. O ano internacional da tabela periódica e o ensino de química: das cartas ao digital
Proclaimed by UNESCO the International Year of the Periodic Table of Chemical Elements in 2019 (IYPT 2019) will commemorate a remarkable series of important milestones in the history of the periodic table of chemical elements. The periodic table is a valuable instrument for chemistry teaching and their study is important in the development of key chemical co
Quím. Nova. Publicado em: 15/08/2019
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6. UMA AULA DE WALTHER NERNST NO BRASIL
Walther Hermann Nernst is known to have established the basis for the third law of thermodynamics and also as one of the founders of the modern physical chemistry. For his work in chemical thermodynamics, he was awarded the Nobel Prize in chemistry, in 1920. An important fact about this scientist life, not always realized, was his stay in Brazil, in 1914, fo
Quím. Nova. Publicado em: 02/05/2019
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7. A QUÍMICA AMBIENTAL NO BRASIL NOS 40 ANOS DA SBQ
This paper aims to present an overview of the ongoing of the Brazilian environmental chemistry over the last forty years inserted in the context of the Brazilian Chemical Society (SBQ). Initially, a brief history presents the main milestones and premise of its “birth” in the 1980s, as well as the set of major actions taken within the SBQ to consolidate a
Quím. Nova. Publicado em: 2017-07
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8. A importância da lei de Gay-Lussac para a classificação dos compostos orgânicos
This article shows the genesis of the law of volumes of combining gases, formulated by Gay-Lussac in 1808, and how it allowed the expression of the composition of organic compounds in terms of whole numbers of volumes, thus leading to the first classification of organic compounds, formulated by Dumas and Boullay in 1828. It was from this work that Organic Ch
Quím. Nova. Publicado em: 2013
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9. Química e filosofia: rumo a uma frutífera colaboração
This review seeks to present a brief history of the philosophy of chemistry and the major issues discussed in the framework of this emerging discipline of philosophy of science, such as the question of physicalist reductionism and physical and chemical causality. In this vein, it also addresses the current debate over relevant issues of chemical world such a
Quím. Nova. Publicado em: 2013
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10. A pesquisa em Ensino de Química como área estratégica para o desenvolvimento da Química
This paper presents an overview of the development of chemical education as a research area and some of its contributions to society. Although science education is a relatively recent area of research, it went through an expressive development in the last decades. As in the whole world, in Brazil also such development is attested by the expressive number of
Quím. Nova. Publicado em: 2013
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11. Plant physiology as affected by humified organic matter
Since the beginning of Human civilization, the soil organic matter has been used as plant growth promoter and/or regulator. Indeed, early in plant science history, even before the auxin concept has been established, the term "auximones" was coined to describe plant growth promoting humic acids derived from peat. Despite of this, until the end of the 20th cen
Theor. Exp. Plant Physiol.. Publicado em: 2013
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12. A chaptalização do vinho na virada do século XVIII para o XIX: a busca de um padrão para um produto instável
The aim of this study is to show how the French chemist Jean-Antoine Chaptal (1756-1832) made his argument in favor of a practice that consisted of adding sugar to must obtained from immature grapes in order to increase the alcohol content in wine during fermentation. Up to these days regulated and adopted in several countries, this procedure, which would be
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/10/2012