Results 291 to 300 of about 2,137,656 (325)

Extraction of four herbicides from passive organic vapor monitors

Journal of Environmental Science and Health, Part B, 1990
Abstract Four herbicides (2,4‐D, MCPA, trifluralin, and triallate) were applied to and extracted from 3M #3500 Organic Vapor Monitors that use an activated charcoal pad as an adsorbent. Carbon disulfide (2 mL) with the addition of diazomethane in ethyl ether (1 mL) as the extracting liquid gave the best recovery results for all four pesticides. Average
Gary Bruns, Miles Constable
openaire   +1 more source

Soil Organic Matter Sensing for Precision Herbicide Application

1990
A prototype sensor which used near infrared (NIR) reflectance techniques to determine the organic matter content of the surface layer of soil was developed and was tested both in the laboratory and in the field. Laboratory predictions yielded an r2 of 0.89 and a standard error of prediction of 0.23% organic carbon (0.40% organic matter) with 30 ...
KA Sudduth, JW Hummel, RC Funk
openaire   +1 more source

Residues from Organic Arsenical Herbicides in Chemically Thinned Forests

Journal of Environmental Quality, 1986
AbstractConifers in four Pacific Northwest locations and forest types were stem‐injected with the organic arsenicals cacodylic acid and monosodium methanearsonate (MSMA), herbicides used for forest thinning and insect control. Concentrations and locations of As residues in tree stems, twigs, foliage, and in litter and soil were determined.
openaire   +1 more source

Removal of organic herbicides from aqueous solution by ionic liquid modified chitosan/metal-organic framework composite.

International Journal of Biological Macromolecules, 2020
Xianglin Huang, Sheng Feng, Guiliang Zhu, Wei Zheng, Cong Shao, N. Zhou, Qi Meng   +6 more
semanticscholar   +1 more source

HERBICIDES THE RELATIVE TOXICITY OF NITROPHENOLS TO VARIOUS ORGANISMS

Annals of Applied Biology, 1952
The effect of increasing degrees of nitration on the toxicity of phenols was assessed by measuring the toxicity of phenol, o‐ and p‐nitro phenols and 2:4‐dinitro phenol with several different test organisms. Toxicity levels were determined by the concentration required in each case to bring about the following responses: (i) to halve the rate of radial
openaire   +1 more source

A hydrogel composite prepared from alginate, an amino-functionalized metal-organic framework of type MIL-101(Cr), and magnetite nanoparticles for magnetic solid-phase extraction and UHPLC-MS/MS analysis of polar chlorophenoxy acid herbicides

Microchimica Acta, 2019
Sze Chieh Tan, Hian Kee Lee
semanticscholar   +1 more source

Peroxidizing Herbicides: Toxicology to Mammals and Non-target Organisms

1999
The peroxidizing herbicides constitute a growing group of industrial chemicals (for a review see Duke et al. 1991; Boger and Wakabayashi 1995). Their exact mode of action was elucidated only quite recently, when it was realised that these compounds block the enzymatic oxidation of protoporphyrinogen to protoporphyrin (Matringe et al.
openaire   +1 more source

Comparative evaluation of organic herbicides for okra weed management

Journal of Applied Horticulture
Two field experiments were conducted at the Department of Vegetable Science, College of Agriculture, Vellayani, to investigate the impact of various weed control treatments on weed growth and okra production. Weed management is a significant challenge in organic okra farming, often relying on labour-intensive and environmentally harmful mechanical ...
S. Saranya, M. Rafeekher
openaire   +1 more source

Evaluation of Thermal Implements and Organic Herbicides for Weed Control in a Nonbearing Almond (Prunus dulcis) Orchard

Weed technology, 2012
A. Shrestha, Marcelo L. Moretti, N. Mourad   +2 more
semanticscholar   +1 more source

Organic Substrates and Microbial Conversion of Herbicides in Soil

1992
ABSTRACT Kunc, F., 1991. Organic substrates and microbial conversion of herbicides in soil. Presence of organic compounds in soil is one of the main factors that determine the activity of microorganisms including their capability of conversion of xenobiotics.
openaire   +1 more source