نتایج جستجو برای: triazine
تعداد نتایج: 2708 فیلتر نتایج به سال:
Triazine-2-(14)C metsulfuron-methyl is a selective, systemic sulfonylurea herbicide. Degradation studies in soils are essential for the evaluation of the persistence of pesticides and their breakdown products. The purpose of the present study was to investigate the degradation of triazine-2-(14)C metsulfuron-methyl in soil under laboratory conditions. A High Performance Liquid Chromatograph (HP...
Herbicides are generally the most extensively used of the pesticides applied to agricultural crops. However, the literature contains little evidence useful in assessing the potential sources of the general population's exposure to herbicides, including by residential proximity to crops. The objective of this study was to take advantage of data from the PELAGIE mother-child cohort to identify th...
The incidence of breast cancer in the United States has steadily increased for the past three decades. Exposure to excess estrogen, in both natural and synthetic forms, has been implicated as a risk factor for the development of this disease. Considerable interest has been focused on organochlorines, such as the triazine herbicides, and their possible role in the initiation or promotion of huma...
a quantitative structure-activity relationship (qsar) study was conducted for the prediction of inhibitory activity of 1-phenyl[2h]-tetrahydro-triazine-3-one analogues as inhibitors of 5-lipoxygenase. the inhibitory activities of the 1-phenyl[2h]-tetrahydro-triazine-3-one analogues modeled as a function of molecular structures using chemometrics methods such as multiple linear regression (mlr) ...
A series of new clubbed aryl oxadiazole-1,2,4-triazine derivatives (6a-l) were designed and synthesized using appropriate chemical routes. The structures to have the required structural elements for any compounds be potential anticonvulsant. Preliminary screening anticonvulsant activity was performed maximal electroshock seizure (MES), subcutaneous pentylenetetrazole-induced (scPTZ) behavioral ...
The rate of CO(2) reduction in the S-triazine-resistant biotype of smooth pigweed (Amaranthus hybridus L.) was lower at all levels of irradiance than the rate of CO(2) reduction in the susceptible biotype. The intent of this study was to determine whether or not the lower rates of CO(2) reduction are a direct consequence of the same factors which confer triazine resistance. The quantum yield of...
Abstract The energetic compound 5,7‐diamino‐2‐nitro‐1,2,4‐triazolo[1,5‐a]‐1,3,5‐triazine (ANTT) was synthesized through the selective nitration of 2,5,7‐triamine‐1,2,4‐triazolo[1,5‐a]‐1,3,5‐triazine (TTT). This facile synthetic strategy yields a highly insensitive nitrogen bicycle with potential for further functionalization. ANTT chemically characterized by NMR, IR, and single crystal X‐Ray cr...
Equine protozoal myeloencephalitis (EPM) is a nervous system disease caused by the protozoan Sarcocystis neurona. The clinical syndrome caused by the disease can have a variety of presentations. Classically, horses present with asymmetric ataxia and weakness defined by multifocal central nervous system lesions. Successful management of this disease has been frustrated by failure of treatment su...
The title compound, C(19)H(28)N(8)O(2), was prepared by the reaction of N(2),N(2),N(4),N(4)-tetra-ethyl-6-hydrazino-1,3,5-triazine-2,4-diamine and 1-(4-nitro-phen-yl)ethanone in ethanol at room temperature. The mol-ecular conformation is stabilized by intra-molecular C-H⋯N hydrogen-bonding inter-actions. There are also inter-molecular N-H⋯O hydrogen bonds, and C-H⋯π and π-π inter-actions, which...
The reaction of the cyanoacetylhydrazine (1) with α-bromoketones (2a-c) gave the hydrazide-hydrazone derivatives 3a-c. The latter compounds underwent ready cyclization when heated in sodium ethoxide to form the 1,3,4-oxadiazine derivatives 4a-c. The reaction of 3a with hydrazines gave the 1,3,4-triazine derivatives 7a,b. Compounds 3a-c and 7a,b underwent some heterocyclizations when treated wit...
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