Results 191 to 200 of about 154,517 (228)

N‐Sulfonyl Azalevoglucosan: A Versatile Platform for the Synthesis of Polysubstituted Piperidines

Chemistry – A European Journal, EarlyView.
Gain by strain: The synthesis of a levoglucosan analog, in which the pyranose oxygen has been replaced by a nitrogen, allows navigation on the piperidine ring to iteratively install functional groups at C1, C2, C3, C4, and C6 positions using simple experimental protocols with minimal protecting group manipulation.
Dylan Yorga, Jérôme Marrot, Ana Poveda, Nicolas Auberger, Jesús Jiménez‐Barbero, Jérôme Désiré, Yves Blériot   +6 more
wiley   +1 more source

Electrochemiluminescence of Heteroleptic Iridium(III) Complexes Featuring Substituted 2,4‐diphenylpyridinato Ligands

Chemistry – A European Journal, EarlyView.
Five heteroleptic iridium(III) complexes bearing cyclometalated 2,4‐diphenylpyridinato ligands were synthesized and their electrochemiluminescence (ECL) investigated. Two different coreactants were evaluated: tri‐n‐propylamine and benzoyl peroxide under anodic and cathodic potentials, respectively.
Ovini Jayawardana, El M. S. Martin, Oliver G. Stansfield, Egan H. Doeven, Carol Hua, Timothy U. Connell, Paul S. Francis   +6 more
wiley   +1 more source

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2,4-D plasmids and persistence

Nature, 1977
ACCORDING to the UN Food and Agricultural Organisation production year book of 1974, 27×10 kg of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) were consumed in 1973, making this the most extensively used of all pesticides. One desirable characteristic of 2,4-D, apart from its efficacy as a herbicide, is its lack of persistence in the environment,
Pemberton, J. M., Fisher, P. R.
openaire   +5 more sources

2,4-D dissipation in field soils after applications of 2,4-D dimethylamine salt and 2,4-D 2-ethylhexyl ester

Environmental Toxicology and Chemistry, 1997
Abstract 2,4-Dichlorophenoxyacetic acid (2,4-D) was first registered in 1947 as an agricultural herbicide, and it is still the most widely used herbicide worldwide. End-use products, however, are generally formulated as inorganic or amine salts, or as esters.
Ronald D. Wilson, Joseph Geronimo, James A. Armbruster   +2 more
openaire   +1 more source

Engineering 2,4-D resistance into cotton

Theoretical and Applied Genetics, 1992
To reduce damage by drift-levels of the herbicide 2,4-dichlorophenoxyacetic acid, we have engineered the 2,4-D resistance trait into cotton (Gossypium hirsutum L.). The 2,4-D monooxygenase gene tfdA from Alcaligenes eutrophus plasmid pJP5 was isolated, modified and expressed in transgenic tobacco and cotton plants.
C, Bayley, N, Trolinder, C, Ray, M, Morgan, J E, Quisenberry, D W, Ow   +5 more
openaire   +2 more sources

2,4-D DEGRADATION AND 2,4-D DEGRADING MICROORGANISMS IN SOILS1

Soil Science, 1984
ABSTRACT In laboratory studies on Cecil loamy sand and Webster sandy clay loam, I examined the influence of soil-water tension and soil temperature on 14C-2,4-D degradation and the formation of nonextractable 14C-residues, and I correlated the degradation rate with the growth rate of 2,4-D degrading microorganisms. 14C-2,4-D rapidly mineralized in the
openaire   +1 more source

Animal models in the neurotoxicology of 2,4-D

Human & Experimental Toxicology, 2019
2,4-D is a selective pre- and postemergence herbicide used for several crops. It is hazardous for the environment and risk for humans; therefore, several studies attempt to evaluate its effects and consequences of its use. The nervous system is supposedly a target for this herbicide, and this comprehensive review gathers the information about animal ...
LM Freitas, LP de Assis Valadares, MGM Camozzi, PG de Oliveira, MR Ferreira Machado, FC Lima   +5 more
openaire   +2 more sources

The level of action of 2,4-D on transcription

Experientia, 1978
In mature cells, 2,4-D retards transcription when it is applied before 3H-uridine incorporation. But transcription is accelerated when it is applied after feeding with 3H-uridine. It has been suggested that the action of 2,4-D on transcription is only at the level of initiation.
openaire   +2 more sources

The localization of 2,4-D in leaf tissue

Planta, 1970
Disruption of chloroplast structure is known to occur following applications of 2,4-dichlorophenoxyacetic acid (2,4-D) to the leaves of Phaseolus vulgaris. Although chloroplasts which had been extracted from treated tissue in an aqueous medium were free from 2,4-D and its metabolites, those extracted from freeze-dried tissue in organic solvents are the
N D, Hallam, J A, Sargent
openaire   +2 more sources

The degradation of 2,4-D in forest litter

Bulletin of Environmental Contamination and Toxicology, 1967
These studies have shown that 2,4-D is rapidly degraded in forest litter and that the rate of degradation varies with the type of litter, herbicide formulation and the presence of DDT. The degradation of 2,4-D varies slightly in litter from different vegetation types when incubated under similar environmental conditions.
L A, Norris, D, Greiner
openaire   +2 more sources