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5 results on '"Marco André Alves de Souza"'

3. Seasonality Effect on Essential Oil Yield and Chemical Composition of Four Accessions of Schinus molle L

Author

Debora Baptista Pereira, Neide Mara de Menezes Epifanio, Marco André Alves de Souza, and Douglas Siqueira de Almeida Chaves

Subjects
Schinus molle, chemistry.chemical_compound, Horticulture, biology, chemistry, Myrcene, Pepper, Sabinene, Anacardiaceae, General Chemistry, biology.organism_classification, Metabolic profile
Abstract

the objective of this study was to determine the yield and chemical composition of the essential oils of the dry leaves of four accessions of false pepper tree ( Schinus molle L.) collected at four different sites in the city of Volta Redonda, Rio de Janeiro, Brazil, in four seasons of the year. After hydrodistillation extraction and chemical analysis of the essential oils by GC-FID and GC-MS, bicyclogermacrene and sabinene were found to be the major chemicals in the essential oils obtained during the summer (34.34% and 26.54%), autumn (23.63% and 45.4%) and spring (21.06% and 45.39%), while myrcene and sabinene were the main chemicals found during winter (21.97% and 27.32%) respectively. It was observed that the metabolic profile of Schinus molle has strong influence of seasonality, since this was variable throughout the year.

Published
2019
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4. Synthesis, characterization, and biological activity of a new class of dialkylphosphorylhydrazone derivatives of isatin

Author

Letícia Silotti Zampirolli, Marcela Jacques de Lemos, Vinícius Tomaz Gonçalves, Marco Andre Alves de Souza, Sonia Regina de Souza, Victor Marcos Rumjanek, and João Batista Neves DaCosta

Subjects
dialkylphosphorylhydrazones, isatins, biological activity, Chemistry, QD1-999
Abstract

Sixteen dialkylphosphorylhydrazones were synthesized by condensation of phosphorylhydrazines with substituted isatins. Products were characterized by FTIR, ¹H-NMR, 13C-NMR, and 31P-NMR. Fungicidal activities of these compounds against Rhizoctonia solani and Fusarium oxysporum were also evaluated. Some compounds inhibited the growth of Rhizoctonia solani and Fusarium oxysporum by 43% and 51%, respectively. These compounds exhibited no effects on germination of lettuce seeds (Lactuca sativa L).

Published
2014
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5. Atividade biológica do lapachol e de alguns derivados sobre o desenvolvimento fúngico e em germinação de sementes Biological activity of lapachol and some derivatives as antifungal and in seed germination

Author

Marco Andre Alves de Souza, Andrea Rosane da Silva, Marcio Alcântara Ferreira, Marcela Jacques de Lemos, Rafael Gonçalves Ramos, Aurélio Baird Buarque Ferreira, and Sonia Regina de Souza

Subjects
lapachol, Fusarium oxysporum, Lactuca sativa L, Chemistry, QD1-999
Abstract

The natural quinones lapachol, α-lapachone and β-lapachone, and the synthetic derivative β-lapachone-3-sulfonic-acid were assayed for inhibition of fungal growth (Fusarium oxysporum) and germination of lettuce seeds (Lactuca sativa L.). β-Lapachone has the strongest activity as a germination inhibitor and lapachol shows no effect. β-Lapachone, followed by lapachol, are the most active in reducing fungal growth.

Published
2008
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