308 research outputs found
Biological aspects of Aphis gossypii Glöver, 1877 (Hemiptera: Aphididae) on colored lint cotton cultivars
Grouping sunflower genotypes for yield, oil content, and reaction to Alternaria leaf spot using GGE biplot
Estudo fitoquĂmico e anĂĄlise mutagĂȘnica das folhas e inflorescĂȘncias de Erythrina mulungu (Mart. ex Benth.) atravĂ©s do teste de micronĂșcleo em roedores
Chemical composition and dry matter digestibility of sugar cane oxide treated with calcium
Hypotensive effect and endothelium-dependent vascular action of leaves of Alpinia purpurata (Vieill) K. Schum
The aims of this study were to evaluate the chemical profile, vascular reactivity, and acute hypotensive effect (AHE) of the ethanolic extract of leaves of Alpinia purpurata (Vieill) K. Schum (EEAP). Its chemical profile was evaluated using HPLC-UV, ICP-OES, and colorimetric quantification of total flavonoids and polyphenols. The vascular reactivity of the extract was determined using the mesenteric bed isolated from WKY. AHE dose-response curves were obtained for both EEAP and inorganic material isolated from AP (IAP) in WKY and SHR animals. Cytotoxic and mutagenic safety levels were determined by the micronucleus test. Rutin-like flavonoids were quantified in the EEAP (1.8 ± 0.03%), and the total flavonoid and polyphenol ratios were 4.1 ± 1.8% and 5.1 ± 0.3%, respectively. We observed that the vasodilation action of EEAP was partially mediated by nitric oxide (·NO). The IAP showed the presence of calcium (137.76 ± 4.08 Όg mg-1). The EEAP and IAP showed an AHE in WKY and SHR animals. EEAP did not have cytotoxic effects or cause chromosomic alterations. The AHE shown by EEAP could result from its endothelium-dependent vascular action. Rutin-like flavonoids, among other polyphenols, could contribute to these biological activities, and the calcium present in EEAP could act in a synergistic way
Efeito de prĂĄticas de manejo sobre o rendimento de grĂŁos e a qualidade industrial dos grĂŁos em arroz irrigado
Plant regulators and invertase activity in sugarcane at the beginning of the harvest season
Co-occurring morphologically distinct algae support a diverse associated fauna in the intertidal zone of Araçå Bay, Brazil
Intracranial variables in propofol or sevoflurane-anesthestized dogs subjected to subarachnoid administration of iohexol
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