Results: 147

Potentiality of Epoxy-Montmorillonite Composite for Stir-Bar Sorptive Extraction for Determination of Atrazine

Abstract A new low-cost material is presented for the first time, aiming to study the sorption process for the stir-bar sorptive extraction (SBSE) technique. The bars were made using a composition of a commercial epoxy resin and montmorillonite, under different compositions and a final ratio of 70% (epox...

Quality of adzuki bean seeds desiccated with flumioxazin and subjected to storage

Arq. Inst. Biol; 87 (), 2020
Production and storage environments influence the physiological and sanitary quality of seeds. This study aimed to evaluate the effects of the herbicide flumioxazin applied as a preharvest desiccant and storage on the physiological and sanitary quality of adzuki bean seeds. A randomized block design was ...

Sorption and desorption of ametryn in different types of soils

Biosci. j. (Online); 35 (6), 2019
Knowledge of factors related to the dynamics of herbicides in the environment is of fundamental importance to predicting the behavior of herbicides in soils with different attributes, to select appropriate dosages, as well as to avoid harmful effects on the environment and subsequ...

Adjuvants plus phytosanitary products and the effects on the physical-chemical properties of the spray liquids

Biosci. j. (Online); 35 (6), 2019
The frequent tank mixing of phytosanitary products, adjuvants, and foliar fertilizers highlights the lack of information which sustains decisions about what products can be mixed for spray application. Thus, the aim of this study was to evaluate the physical and chemical characte...

Chemical profile and allelopathic potential of Anacardium humile St. Hill. (cajuzinho-do-cerrado) leaf aqueous extract in the seed germination and seedling growth of lettuce, tomato and sicklepod

Biosci. j. (Online); 35 (6), 2019
Anacardium genus, Anacardiaceae, stands out for the presence of phenolic compounds. One of its species, investigated for its different potential uses, is Anacardium humile; however, little is known about its allelopathic effects. Therefore, the present study aimed to determine the chemical profile and ev...

Efecto de la n-acetilcisteina inhalada en el desarrollo de fibrosis pulmonar de ratas intoxicadas con paraquat
Effect of n-acetylcisteine inhaled in the development of pulmonary fibrosis of intoxicated rats with paraquat

Rev. Inst. Nac. Hig; 50 (1-2), 2019
El Paraquat (PQ) es un herbicida de contacto bipiridilico ampliamente utilizado en agricultura. La intoxicación en humanos por este agente ocasiona fibrosis pulmonar. Evaluamos los cambios histológicos pulmonares de ratas intoxicadas con PQ y tratadas con N-aceticisteina (NAC) administrada vía inhalat...

Phytochemical screening and toxicity of Crambe abyssinica Hochst extracts on Solanum lycopersicum L., Euphorbia heterophylla L., Bidens pilosa L. and Glycine max (L. ) Merril

Biosci. j. (Online); 35 (5), 2019
This study aimed to identify the main groups of secondary compounds from Crambe abyssinica and evaluate the bioactivity of the hexane, ethyl acetate and methanol extracts on the seed germination and seedling development of tomato, wild poinsettia, hairy beggartick and ...

Germination constraints of dicarpic cypselae of Bidens pilosa L

Braz. j. biol; 79 (3), 2019
Abstract Bidens pilosa L. is a heterocarpic weed species with two cypselae types that present morpho-physiological differences, being the peripheral type smaller and slower to germinate than the central one. We aimed to verify how the germination mechanism varied between types. We focused on two mechanis...

Low level resistance of wild poinsettia biotypes to glyphosate and alternative chemical control

Biosci. j. (Online); 35 (4), 2019
In the State of Rio Grande do Sul (RS), Southern Brazil, glyphosate has not been capable of controlling wild poinsettia (Euphorbia heterophylla L.) in soybean fields, thus, suggesting resistanceto this herbicide. Therefore, this study aimed at evaluating sensitivity of wild poinsettia bioty...