7 documents found, page 1 of 1
Biomarkers in Source Rocks from Barreirinha Formation (Devonian): Distribution ...
Silva,Andrenilton F.; Barros,Artur L. C.; Sousa,Alek A. C.; Jarvie,Daniel M.; Calderón,Sebastian M.; Brito,Ailton S.; Nogueira,Afonso C. R.The Barreirinha Formation-Upper Devonian, is the main petroleum source rock of the Amazon Basin, deposited during the great Devonian Transgression, contributing to significant accumulations of organic matter (OM) in anoxic conditions, which allowed its preservation. The present work had the objective of characterizing the molecular composition of biomarkers in outcrops samples of the Barreirinha Formation, aimi...
Antioxidant Properties of Croton zehntneri Pax et Hoffm. Essential Oil and Its ...
Sousa,Antônio J. P.; Oliveira,George L. S.; Fonseca,Lorenna; Rocha,Marcio S.; Rai,Mahendra; Santos,Francisco E. P.; Lima,Sidney G. deCroton zehntneri Pax et Hoffm. is a plant from Northeastern Brazil, whose main component of its essential oil is estragole. Its thermal instability and low aqueous solubility prevent its technological application. This study aimed to prepare and characterize the Croton zehntneri essential oil (CZEO) complexed with β-cyclodextrin (β-CD), and to evaluate antioxidant activity of free and complexed-CZEO in vitro sy...
Theoretical and Experimental Investigations on Inclusion Complex β-Cyclodextrin...
Silva,Ivan S.; Feitosa,Eduardo L.; Santos,Márcio E. P.; Silva,Raiane M.; Rocha,Márcio S.; Silva,Francisco I. da; Lima,Francisco C. A.In this paper, we have applied state-of-the-art technologies and new investigations were developed focusing on obtaining simple and inexpensive molecules for treating cardiovascular diseases, as they are considered the leading cause of death in the world. For the first time, the inclusion complex of sulcatone (SU) and β-cyclodextrin (β-CD) was achieved (using a spray drier) and characterized making use of spect...
Using a Multivariate Approach to Compare Lipid Extraction Protocols from Microa...
Dall'Oglio,Daiane F.; Sousa,Laísse C. de; Sousa,Samuel A. A. de; Garcia,Marco A. S.; Sousa,Edymilaís S.; Lima,Sidney G. de; Costa,Pelrry S.Microalgae lipid-derived biofuels is considered promising candidates for substitution of petroleum-based energy sources. However, the lipid extraction from the algal biomass stands as a challenge due to its low yields and cost-intensive cell disruption procedures. In this study a multivariate optimization of the extraction conditions was suggested, aiming a maximization of the lipid extraction from Scenedesmus ...
Preparação e caracterização do complexo de inclusão do óleo essencial de Croton...
Aguiar,Ulisses N.; Lima,Sidney G. de; Rocha,Márcio S.; Freitas,Rivelilson Mendes de; Oliveira,Talita M.; Silva,Raiane M.; Moura,Lara C. B.Croton zehntneri, a plant native to northeastern Brazil, is widely used in folk medicine to treat gastrointestinal problems and has rich essential oil content. The essential oil of C. Zehntneri was analyzed by GC-MS, and its inclusion complex with β-cyclodextrin (β-CD) was characterized by both vibrational spectroscopy and differential scanning calorimetry (DSC). Estragol was the major component identified in t...
Chemical constituents and evaluation of cytotoxic and antifungal activity of La...
Medeiros,Lídia B. P.; Rocha,Márcio dos S.; Lima,Sidney G. de; Sousa Júnior,Gustavo R. de; Citó,Antônia M. das G. L.; Silva,Davi da; Lopes,José A. D.The essential oil (EO) of aerial parts of Lantana camara L., Verbenaceae, from Simões, Piaui, Northeast of Brazil, were obtained by hydrodistillation and analyzed by GC-FID and GC-MS techniques. In total, 68 compounds were identified. The most representative compounds of the oil were mono and sesquiterpenes. The main compounds found in the oil of the leaves in different months were β-caryophyllene (10.5%, in Ju...
Composição química e avaliação das atividades antibacteriana e de toxicidade do...
Costa,José G. M. da; Sousa,Erlânio O. de; Rodrigues,Fabíola F. G.; Lima,Sidney G. de; Braz-Filho,RaimundoOs óleos essenciais de Lantana camara L. e Lantana sp., Verbenaceae, foram obtidos por hidrodestilação e seus componentes analisados por CG/EM. Tal procedimento analítico revelou a predominância dos sesquiterpenos, biciclogermacreno (19,42%), isocariofileno (16,70%), valenceno (12,94%) e germacreno D (12,34%) no óleo de L. camara, enquanto o biciclogermacreno (13,93%), germancreno D (27,54 e β-cariofileno (31,5...