Josivan S. Costa

Physicochemical Characterization of Water Quality - Lagoa dos Índios in Macapá, Brazil

Josivan S. Costa, Francinaldo S. Braga, Sheylla Susan M. S. Almeida, Ryan S. Ramos, Daímio C. Brito, Alan C. Cunha & Cleydson Breno R. Santos · Chemical Science International Journal · 2014

Aims: To characterize relevant physicochemical parameters of water quality in an Amazonian tropical lake and compare them with the reference values of the Brazilian Resolution CONAMA 357/2005 and those recommended by the similar US-EPA law. In addition, to correlate statistically...

Open access Research Article 10.9734/ACSJ/2015/11705

Molecular Modeling as a Didactic Tool in Organic Chemistry Teaching on Some Abuse Drugs Thematic

Leonardo A. Ramos, Josivan S. Costa, Talita P. C. Chierrito, Davi S. B. Brasil, Cleydson B. R. Santos & Lorane I. S. Hage-Melim · Journal of Education, Society and Behavioural Science · 2015

Aims: Chemistry is a complex science, due it theories explain the phenomena at the microscopic level, making the concepts of it difficult to understand, which restrict students perception. This work demonstrates the importance of Information and Communication Technologies (ICTs)...

Open access Research Article 10.9734/BJESBS/2016/22165

Computational Chemistry Programs as a Facilitating Tool in the Teaching and learning Process

Francisco D. Silva, Kelton L. B. Santos, Leandro D. Santos, Cleison C. Lobato, Josivan S. Costa, Gerson A. C. Lopes & Cleydson B. R. Santos · Journal of Education, Society and Behavioural Science · 2015

Aims: To verify the influence of the role of ICT’s (Information and Communication Technologies) as a teaching and learning process in the classes of chemistry discipline for the 3rd years high school students, and show the importance of computational chemistry programs as a metho...

Open access Research Article 10.9734/BJESBS/2015/14819

Oral Administration of Euterpe oleracea Mart., Its Influence over Body Weight and Lymphoid Organs and Alterations in Haematological and Glycaemical Parameters

Mayara T. Pinheiro, Nayara S. R. Silva, Cleison C. Lobato, Francinaldo S. Braga, César F. Santos, Josivan S. Costa, José Carlos T. Carvalho & Cleydson Breno R. Santos · Journal of Pharmaceutical Research International · 2014

Aims: The aims of the study were to evaluate alterations caused by the oral administration of the aqueous extract of Euterpe oleracea to non-isogenic adult male mice during 15 and 30 consecutive days through the comparison of body and spleen weights, number of splenic and medulla...

Open access Research Article 10.9734/BJPR/2014/10354