Results: 3070

Richness and density of aquatic benthic macroinvertebrates after exposure to fungicides and insecticides in rice paddy fields

An. acad. bras. ciênc; 89 (1), 2017
ABSTRACT The objective of this study was to verify the richness and density of aquatic benthic macroinvertebrates after exposure to fungicides and insecticides of the rice paddy fields. In the crop seasons of 2012/13 and 2013/14, field experiments were performed, which consisted of single-dose applicatio...

Characterization and bioactivities of a novel polysaccharide obtained from Gracilariopsis lemaneiformis

An. acad. bras. ciênc; 89 (1), 2017
ABSTRACT Gracilariopsis lemaneiformis is a type of red alga that contains seaweed polysaccharide agar. In this study, a novel non-agar seaweed polysaccharide fraction named GCP (short of crude polysaccharide obtained from Gracilariopsis lemaneiformis) was isolated from Gracilariopsis lemaneiformis. Struc...

Environmental drivers on leaf phenology of ironstone outcrops species under seasonal climate

An. acad. bras. ciênc; 89 (1), 2017
ABSTRACT Banded iron formations (BIF) have a particular vegetation type and provide a good model system for testing theories related to leaf phenology, due to unique stressful environmental conditions. As a consequence of the stressful conditions of BIF environment, we hypothesize that most species would...

Natural Compounds from Mexican Medicinal Plants as Potential Drug Leads for Anti-Tuberculosis Drugs

An. acad. bras. ciênc; 89 (1), 2017
ABSTRACT In Mexican Traditional Medicine 187 plant species are used in the treatment of respiratory conditions that may be associated with tuberculosis. In this contribution, we review the ethnobotany, chemistry and pharmacology of 63 species whose extracts have been assayed for antimycobacterial activit...

Grape juice increases the BDNF levels but not alter the S100B levels in hippocampus and frontal cortex from male Wistar Rats

An. acad. bras. ciênc; 89 (1), 2017
ABSTRACT Several studies have shown that a high consumption of vegetables and fruits is consistently associated with a low risk of oxidative stress-induced diseases, which includes some degenerative diseases such as amyotrophic lateral sclerosis, Alzheimer and Parkinson. Therefore, the objective of this ...

Autophagy protects against neural cell death induced by piperidine alkaloids present in Prosopis juliflora (Mesquite)

An. acad. bras. ciênc; 89 (1), 2017
ABSTRACT Prosopis juliflora is a shrub that has been used to feed animals and humans. However, a synergistic action of piperidine alkaloids has been suggested to be responsible for neurotoxic damage observed in animals. We investigated the involvement of programmed cell death (PCD) and autophagy on the m...

Effect of Bauhinia holophylla treatment in Streptozotocin-induced diabetic rats

An. acad. bras. ciênc; 89 (1), 2017
ABSTRACT Bauhinia holophylla, commonly known as "cow's hoof", is widely used in Brazilian folk medicine for the diabetes treatment. Therefore, the aim of this study was at evaluating the aqueous extract effect of Bauhinia holophylla leaves treatment on the streptozotocin-induced diabetic rats. Diabetes w...

A Single Resistance Exercise Session Improves Aortic Endothelial Function in Hypertensive Rats

Arq. bras. cardiol; 108 (3), 2017
Abstract Background: Physical exercise is an important tool for the improvement of endothelial function. Objective: To assess the effects of acute dynamic resistance exercise on the endothelial function of spontaneously hypertensive rats (SHR). Methods: Ten minutes after exercise, the aorta was remove...

Análisis preliminar de los metabolitos secundarios de polvos mixtos de hojas de plantas medicinales
Preliminary analysis of secondary metabolites in mixed powders of leaves of medicinal plants

Rev. cuba. plantas med; 22 (1), 2017
Introducción: el tamizaje fitoquímico de una planta brinda una percepción sobre los posibles beneficios medicinales; la literatura refiere información de esta determinación en las hojas deAnacardium occidentale L., Psidium guajava L., Morinda citrifolia L. y Moringa oleifera Lam. , no obstante, en c...

Tissue sulfomucin and sialomucin content in colon mucosa without intestinal transit subjected to intervention with Curcuma longa (curcumin)

Acta cir. bras; 32 (3), 2017
Abstract Purpose: To measure the tissue sulfomucin and sialomucin content of the colon mucosa without fecal flow, subjected to intervention with curcumin, and the influence of the concentration used and the intervention time. Methods: Thirty-six rats were subjected to proximal right colostomy and dis...