Results 141 to 150 of about 5,279,436 (193)

Reactions of phenylurea compounds with aqueous chlorine: Implications for herbicide transformation during drinking water disinfection

Journal of Hazardous Materials, 2012
Phenylurea herbicides have been known to contaminate surface waters serving as potable supplies. To access the potential for transformation of these compounds during drinking water treatment, reactions of phenylurea compounds with aqueous chlorine at different pHs were investigated.
Somyote Sutthivaiyakit, David L. Sedlak, Pakawadee Sutthivaiyakit   +2 more
exaly   +4 more sources

Compliance analysis of phenylurea and related compounds in drinking water by liquid chromatography/electrospray ionization/mass spectrometry coupled with solid-phase extraction

Journal of Chromatography A, 2006
A liquid chromatography/electrospray ionization/mass spectrometry method was reported for the compliance analysis of seven phenylurea compounds and two related herbicides (tebuthiuron and propanil) in drinking water. The volumes of the sample and final extract used in the method were 500 mL and 10 mL, respectively.
Yong-Tao Li, J. E. George, Christina L. McCarty, S. C. Wendelken   +3 more
exaly   +4 more sources

Synthesis and Biological Evaluation of Novel 1-(4-(Hydroxy(1-oxo-1,3-dihydro-2H-inden-2-ylidene)methyl)phenyl)-3-phenylurea Derivatives

Chemistry and Biodiversity, 2017
A series of novel phenylurea containing 2-benzoylindan-1-one derivatives 3a - 3j were synthesized from the reaction of phenylurea-substituted acetophenones 1a - 1j with phthalaldehyde 2 under mild reaction conditions in good yields.
Ceylân Hepokur, Uğur Tutar, Mustafa Ceylan   +2 more
exaly   +3 more sources

Design, synthesis, and biological evaluation of phenylurea indole derivatives as ABCG2 inhibitors

Bioorganic Chemistry, 2023
Three series of phenylurea indole derivatives were synthesized with potent inhibitory activities on ABCG2 with simple and efficient synthetic routes. Among these compounds, four phenylurea indole derivatives 3c-3f with extended π system were discovered ...
Zhe-Sheng Chen, Jing-Quan Wang, Zhuo-Xun Wu   +2 more
exaly   +2 more sources

Synthesis of Imidazole Spiro Compounds From 5-Alkoxycarbonyl-1H-Pyrrole-2,3-Diones and Phenylurea

Chemistry of Heterocyclic Compounds, 2016
5-Alkoxycarbonyl-substituted 1H-pyrrole-2,3-diones react with phenylurea, forming alkyl 4-hydroxy-5-oxo-2-[(phenylcarbamoyl)amino]-2,5-dihydro-1H-pyrrole-2-carboxylates, which cyclize in the presence of sodium methoxide, giving 8-hydroxy-3-phenyl-1,3,6-triazaspiro[4.4]-non-8-ene-2,4,7-triones.
A. Y. Dubovtsev, E. Denislamova, P. Silaichev, M. Dmitriev, A. N. Maslivets   +4 more
semanticscholar   +2 more sources

Optimization of the ESI and APCI experimental variables for the LC/MS determination of s-triazines, methylcarbamates, organophosphorous, benzimidazoles, carboxamide and phenylurea compounds in orange samples.

Journal of Mass Spectrometry, 2007
AbstractIn this work, ten selected pesticides of different chemical groups, indicated to orange culture, were extracted and determined by liquid chromatography–mass spectrometry using both electrospray ionization (ESI) and atmospheric pressure chemical ionization (APCI) operating in the positive ion detection mode.
G. Titato, R. C. Bicudo, F. Lanças
semanticscholar   +3 more sources

1H NMR study of inclusion compounds of phenylurea derivatives in β-cyclodextrin

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2005
Proton nuclear magnetic resonance spectroscopy ((1)H NMR), which has become an important tool for the study "in situ" of beta-cyclodextrin (beta-CD) complexes, was used to study and structurally characterize the inclusion complexes formed between beta-CD and isoproturon, fenuron, monuron and diuron.
N. Dupuy, D. Barbry, M. Bria, S. Marquis, L. Vrielynck, J. Kister   +5 more
semanticscholar   +4 more sources

Phytochemical alteration and new occurring compounds in hairy root cultures of Mitracarpus hirtus L. induced by phenylurea cytokinin (CPPU)

Plant Cell, Tissue and Organ Culture (PCTOC), 2014
Hairy root cultures of Mitracarpus hirtus L. were obtained after transforming leaf-disc explants with wild strain Agrobacterium rhizogenes A13. The root cultures of M. hirtus showed high efficiency of shoot formation in both transformed and non-transformed cultures when illuminated with light.
K. Pansuksan, M. Mii, K. Supaibulwatana
semanticscholar   +2 more sources

Electrochemistry-coupled to liquid chromatography-mass spectrometry-density functional theory as a new tool to mimic the environmental degradation of selected phenylurea herbicides.

Environmental Science: Processes & Impacts, 2021
In vitro and in vivo experimental models, mainly based on cell cultures, animals, healthy humans and clinical trials, are useful approaches for identifying the main metabolic pathways.
Ranil Clément Tonleu Temgoua, U. Bussy, Dimitri Alvarez-Dorta, N. Galland, E. Njanja, J. Hémez, C. Thobie‐Gautier, I. Tonle, M. Boujtita   +8 more
semanticscholar   +2 more sources

Liquid chromatography of phenylurea herbicides and related compounds on chemically bonded ion-exchange materials.

Journal of Chromatography A, 1987
The possibilities of using new chemically bonded anion-exchange (Silasorb DEA) and cation-exchange (Silasorb S) materials for high-performance liquid chromatography of phenylurea herbicide compounds were investigated. The columns packed with Silasorb DEA or with Silasorb S ion-exchange materials can be used for efficient separations in normal-phase ...
P. Jandera, J. Churáček, P. Butzke, M. Smrž   +3 more
semanticscholar   +3 more sources