Results: 239

Soils characterization and classification in clean field, dirty field and forest areas in amazonian environments

Biosci. j. (Online); 35 (4), 2019
The soil and vegetation characteristics of the southern Amazonas region include highly weathered soils, high aluminum content and some hydromorphic conditions, its vegetation is composed from grasslands to small isolated trees and forest galleries along the rivers streams. In th...

Physical and chemical properties of soils in different physiographic environments in the southern Amazonas region

Biosci. j. (Online); 35 (4), 2019
The Amazon region has a great diversity of landscapes such as forests galleries, natural fields (“Cerrados Amazônicos”), dense forest, these environments made possible the formation of a broad class of soils over time. The aim of this study was to evaluate the physical and chemical p...

Efectividad de hongos micorrizo-arbusculares nativos en suelos con diferentes usos agropecuarios

Rev. MVZ Córdoba; 24 (2), 2019
RESUMEN Objetivo. Determinar la efectividad de hongos micorrizo-arbusculares (HMA) de suelos con diferentes usos agropecuarios, en el valle medio del río Sinú, Colombia. Materiales y métodos. Bajo condiciones de invernadero se realizó el experimento, donde se utilizó como planta indicadora Leucaen...

Disposición inadecuada de medicamentos por pacientes o consumidores en su hogar; una revisión sistematica
Inadequate disposal of medications by patients or consumers in your home; a systematic review

Gac. méd. Caracas; 127 (2), 2019
Introducción: Cada año se incrementan los volúmenes de medicamentos utilizados, ocasionando una acumulación en los hogares de pacientes y clientes, que luego son desechados de manera inadecuada, convirtiéndose en un riesgo para el ambiente y la salud pública. Se han encontrado residuos en pequeñas...

Bioprospection of proteases from Halobacillus andaensis for bioactive peptide production from fish muscle protein

BACKGROUND: Biologically active peptides produced from fish wastes are gaining attention because their health benefits. Proteases produced by halophilic microorganisms are considered as a source of active enzymes in high salt systems like fish residues. Hence, the aim of this study was the bioprospection...

Soil chemical attributes variability under tillage and no-tillage in a long-term experiment in southern Brazi l

Biosci. j. (Online); 35 (2), 2019
Spatial variability of chemical attributes in soils tends to increase under the no-tillage system. However, data regarding this variability under this system for a long time are scarce. This study aimed to evaluate the spatial variability of phosphorus (P), organic matter (OM), pH,...

In vitro predatory activity of nematophagous fungi isolated from water buffalo feces and from soil in the Mexican southeastern

Abstract Nematophagous fungi from the feces of water buffalo and soil from southeastern Mexico were isolated, and their in vitro predatory activity against Haemonchus contortus infective larvae (L3) (HcL3) was assessed. The fungi were isolated by sprinkling soil or feces on water agar plates. Six series ...

A face infértil do Brasil: ciência, recursos hídricos e o debate sobre (in)fertilidade dos solos do cerrado brasileiro, 1892-1942

Resumo Aborda a relação entre ciência e cerrado no período entre a publicação do livro de Eugenius Warming (1892) e artigo de Rawitscher, Ferri e Rachid (1943), botânicos da Universidade de São Paulo. Warming afirmou que a escassez de recursos hídricos influenciou na formação da vegetação ca...

Conversion of renewable substrates for biosurfactant production by Rhizopus arrhizus UCP 1607 and enhancing the removal of diesel oil from marine soil

BACKGROUND: The use of agro-industrial wastes to produce high value-added biomolecules such as biosurfactants is a promising approach for lowering the total costs of production. This study aimed to produce biosurfactants using Rhizopus arrhizus UCP 1607, with crude glycerol (CG) and corn steep liquor (CS...

Relative efficacy of organic substrates on maize root proliferation under water stress

Biosci. j. (Online); 35 (1), 2019
The aggravating threat for today’s agriculture is provision of food security to ever-escalating population utilizing scarce resources. Water scarcity is restraining humans to produce more from drops of water in place of gallons. Root is present at soil-plant interface and is main ...