Inorganic Chemistry
Mostrando 13-24 de 89 artigos, teses e dissertações.
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13. QUÍMICA VERDADEIRAMENTE VERDE – PROPRIEDADES QUÍMICAS DO CLORO E SUA ILUSTRAÇÃO POR EXPERIMENTOS EM ESCALA MINIATURIZADA
Chlorine, one of the most frequent elements on earth and most important key chemicals, is indispensable in the syllabi of school and university courses in Inorganic Chemistry. However, its toxicity and high volatility preclude experimental demonstration of its properties in secondary and high schools and most university labs. This paper summarises the indust
Quím. Nova. Publicado em: 2015-03
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14. Nanoporous materials: pillared clays and regular silicas as an example of synthesis and their porosity characterization by X-ray diffraction
Because of their practical applications, porous materials attract the attention of undergraduate students in a way that can be used to teach techniques and concepts in various chemistry disciplines. Porous materials are studied in various chemistry disciplines, including inorganic, organic, and physical chemistry. In this work, the syntheses of a microporous
Quím. Nova. Publicado em: 2014
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15. Produção de casos para o ensino de Química: uma experiência na formação inicial de professores
The Method of Case Studies has often been employed in higher education, but few initiatives have focused on basic education. This work addressed the production of cases by students from a chemistry teacher training course. The proposal was applied in the discipline of Basic Inorganic Chemistry and aimed to familiarize students with the Method from the prepar
Quím. Nova. Publicado em: 2013
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16. Aspectos da biogeoquímica dos rios Teles Pires e Cristalino - MT / Aspects of the biogeochemistry of Teles Pires and Cristalino rivers - MT
The Amazon basin occupies around 40% of the brazilian territory and contains more than 60% of the water resources of the country. Abundant and yet little exploited region water resources constitute a national treasure to which the nation can not turn its back. Besides changes in land use/cover, several hydroelectrical plants are planned for rivers in the reg
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/06/2012
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17. Complexos metálicos de hidrazonas, tiossemicarbazonas e lapachol: atividade farmacológica e avaliação de relações estrutura-atividade
The present work comprises the synthesis and characterization of metal compounds with bioactive ligands and the study of their pharmacological profile. Anti-inflammatory, antimicrobial, antiparasitic and antitumor drug candidates were designed. Complex [Zn(LASSBio-466)H2O]2 was synthesized with salicylaldehyde-2-chlorobenzoyl hydrazone (H2LASSBio-466), while
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2012
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18. Os nanomateriais e a descoberta de novos mundos na bancada do químico
In recent years there has been great progress in the field of nanotechnology largely driven by research into nanomaterials. Chemistry appears in this context for its relevant role in the synthesis and surface modification of nanomaterials. This review article discusses fundamental concepts related to the synthesis and properties of inorganic nanoparticles wi
Química Nova. Publicado em: 2012
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19. Preparação de nanopartículas de prata e ouro: um método simples para a introdução da nanociência em laboratório de ensino
A new practical experiment involving silver and gold nanoparticle syntheses was introduced in an inorganic chemistry laboratory course for undergraduate students at the Institute of Chemistry, UNICAMP. The nanoparticles were synthesized by the reduction of silver nitrate and tetrachloroauric acid with sodium borohydride and sodium citrate in an aqueous mediu
Quím. Nova. Publicado em: 2012
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20. Laboratory projects using inquiry-based learning: an application to a practical inorganic course
This paper reports how laboratory projects (LP) coupled to inquiry-based learning (IBL) were implemented in a practical inorganic chemistry course. Several coordination compounds have been successfully synthesised by students according to the proposed topics by the LP-IBL junction, and the chemistry of a number of metals has been studied. Qualitative data we
Química Nova. Publicado em: 2011
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21. Abordagem teórico-experimental da teoria do campo cristalino na disciplina de síntese inorgânica
We describe herein the synthesis and characterization of the complexes KNiF3, [Ni(en)3]I2, [Ni(en)3]Cl2, [Ni(acac)2(H2O)2], [Ni(en)2(H2O)2]Cl2 and [Ni(NH3)6](BF4)2 (en = ethylenediamine, acac- = acetylacetonate) performed in the inorganic synthesis major course at the Chemistry Institute of UFRGS (Universidade Federal do Rio Grande do Sul). The compounds wer
Química Nova. Publicado em: 2011
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22. Escrita científica de alunos de graduação em química: análise de relatórios de laboratório
The purpose of this study was to analyze written arguments found within laboratory reports by undergraduate students in a practical inorganic chemistry course. The quality of students' argumentation was analyzed based on the argumentation model developed by Kelly and Takao. Students presented scientific arguments grounded in data and building toward theoreti
Química Nova. Publicado em: 2010
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23. Acetatos homo e heterotrinucleares de ferro: um experimento para o laboratório de química de coordenação
Homo and heterotrinuclear acetates are unique compounds having μ3-oxo bridge and many interesting properties of such compounds are derived from this structure. Some undergraduate inorganic textbooks discuss several aspects of these compounds and we present here an undergraduate experiment for the high-yield synthesis of [Fe2MO(CH3CO2)6(H 2O)3], with M = Fe3
Química Nova. Publicado em: 2010
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24. Fracionamento de polifosfato de sódio e caracterização por RMN de 31P: um experimento para aulas de físico-química
This text describes an experiment on fractional precipitation of a polymer together with determination of average degree of polymerization by NMR. Commercial sodium polyphosphate was fractionated by precipitation from aqueous solution by adding increasing amounts of acetone. The polydisperse salt and nine fractions obtained from it were analyzed by 31P Nucle
Química Nova. Publicado em: 2010