ISSN 0187-893X       ISSNE 1870-8404
Martes, 30 de del 2014

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Guide authors of the current issue Volumen XXV, Número 3, July de 2014 Volumen XXV, Número E1, May de 2014 Volumen XXV, Número EL, April de 2014 Volumen XXV, Número 2, April de 2014
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Papers of the current issue

Analysis of a Teaching/Learning Sequence on Chemical Bonding written by Brazilian Chemistry students on teachers training

Luciana Passos Sá, Andoni Garritz

In this work the authors understand a Teaching/Learning Sequence (TLS) as a tool to strengthen the relationship between the theories boarded in teachers training courses and the practices evolved by the teachers in formation. From this perspective, our objective is the analysis of the nature of didactic strategies shown in a TLS on Chemical Bonding, written for and applied in Secondary Education by pre-service teachers, participants in a Brazilian Program of teachers training (PIBID, translated as Institutional Program of Scholarships for Teaching Initiation). The proposal of making the TLS was considered as an important action in the training of the scholarship holders, because it represented reflection and collaborative work among the participants. Moreover the PIBID, through actions that encourage the creation, development and evaluation of teaching methods, has contributed significantly to the formation of a teacher reflective and conscious of teaching needs, challenges and opportunities in the profession. KEYWORDS: Chemical Bonding, Teaching/Learning Sequence, teachers training, PIBID

An interdisciplinary study on monosubstituted benzene involving computation, statistics and chemistry

João E. V. Ferreira, Clauber H. S. da Costa, Ricardo Miranda de Morais, Antonio F. Figueiredo, Yoanna M. A. Ginarte

Computation and statistics have given a great contribution to the chemical research and education because both sciences make possible to deal with many different types of information about atoms and molecules. This paper describes the use of computation and statistics to study 20 different groups in monosubstituted benzene. Firstly compounds had their geometries optimized and molecular descriptors were computed. Then two exploratory methods, principal component analysis and hierarchical cluster analysis, were employed to classify these groups according to their activating and deactivating effects on rate of electrophilic aromatic substitution reactions. The pedagogical objective is to show an interdisciplinary application in organic chemistry and motivate students and teachers to apply this strategy in the classroom. Keywords: graduate education, interdisciplinary, computer-based learning, statistics, chemometrics.

Design strategies for materials with spin crossover [SCO]

Mario González-Gutiérrez, Josué Domínguez-Alcázar, Ernesto Quintero-Rivera, Samuel Ramírez-Jiménez, Pablo A. Martínez-Bulit, Noráh Y. Barba-Behrens

The study of the Spin crossover (SCO) materials began in the early 1930s. After eight decades, different research groups developed strategies for the synthesis of SCO materials. Recently Gtlich has proposed few rules as requirement for designing SCO materials. In this paper we present a brief description of the main strategies, their relation to Gtlichs rules and their respective validation according to Crystal-field theory and Molecular Orbital theory, including the definition of the Cooperativity Model. It is briefly exposed the state of art and future perspectives of SCO materials and their applications. Keywords: Spin crossover, Crystal Field Theory, Molecular Orbital Theory, Cooperativity, Temperature-dependent SCO, LIESST, LD-LISC, CISCO, LD-CISSS.

Hutchinson-Gilford Progeria Syndrome. Causes, research and pharmacological treatments

Causas, investigación y tratamientos farmacológicos

María Genoveva González Morán

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Women in Science: the interest of the female Brazilian students by the scientific career

Márcia Borin da Cunha, Olga Maria Ritter Peres, Marcelo Giordan, Raquel Roberta Bertoldo, Glessyan de Quadros Marques, Angela Camila Duncke

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The collaborative method as an alternative for the experimental work of Organic Chemistry

Francisca Ofelia Muñoz-Osuna, Karla Lizbeth Arvayo-Mata, Carmen Alicia Villegas-Osuna, Francisco Humberto González-Gutiérrez, Oscar Alberto Sosa-Pérez

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Antimicrobial activity in fighting mosquito larvae Aedes aegypti: Homogenization of essential oils of linalool and eugenol

Laurinda Fernanda Saldanha Siqueira, Erika de Kássia Pereira Cantanhede, Oswaldo Palma Lopes Sobrinho, Aldemir da Guia Schalcher Pereira, Álvaro Itaúna Schalcher Pereira

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