Results 21 to 30 of about 148,723 (205)

Degradation of pyridine in coal chemical wastewater using ionizing radiation and synergistic processes

Fushe yanjiu yu fushe gongyi xuebao
This study investigates the degradation of pyridine in coal chemical wastewater using electron beam (EB) irradiation and explores the impacts of absorbed dose, initial pyridine concentration, and pH.
WANG Xinxuan, YANG Qi, ZHANG Zhonglei, CHEN Hai, CHEN Chuanhong, ZHANG Tao   +5 more
doaj   +1 more source

An Efficient Synthesis of a Variety of Substituted Pyridine-3-Thiols

Журнал органічної та фармацевтичної хімії
A practical and convenient method for the synthesis of pyridine-3-thiols using substituted 3-iodopyridines as starting compounds has been developed. Based on the use of thiobenzoic acid as a sulfur donor in a two-step procedure, this approach made it ...
Oleksandr V. Borysov, Dmytro P. Bohdan
doaj   +1 more source

Scope and Limitations of a Novel Synthesis of 3-Arylazonicotinates

Molecules, 2012
The reaction of 3-oxo-3-phenyl-2-phenylhydrazonal with functionally substituted and heteroaromatic substituted acetonitrile to yield arylazonicotinic acid derivatives and 5-arylsubstituted pyridines was established. In some cases the produced nicotinates
Awatef Mohamed El-Maghraby, Maghraby Ali Selim, Omniya Sayed Zaky, Moustafa Sherief Moustafa, Mohamed Hilmy Elnagdi   +4 more
doaj   +1 more source

5,5'-(1,4-Phenylenedimethylylidene)bis(1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H,5H)-dione)

Molbank, 2010
A novel compound, 5,5'-(1,4-phenylenedimethylylidene)bis(1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H,5H)-dione) (3) has been synthesized by condensation of 1,3-diethyl-2-thiobarbituric acid and terephthalaldehyde in anhydrous ethanol in the presence of ...
Salman A. Khan, Abdullah Mohamed Asiri
doaj   +1 more source

Synthesis, Crystallographic Study and Antibacterial Activity of Ternary Copper(II) Complex with Chromone-Based Ligand and Pyridine

Crystals
A new copper(II) complex was synthesized using chromone-2-carboxylic acid as the main ligand, and coordinated pyridine molecules. The complex was successfully crystallized and structurally characterized by single crystal X-ray diffraction.
Nikolina Filipović, Anamarija Stanković, Martina Medvidović-Kosanović, Dominik Goman, Stjepan Šarić, Goran Palijan, Tomislav Balić   +6 more
doaj   +1 more source

Simultaneous Determination of the Contents of Quinoline, Pyridine and Crotonaldehyde in Footwear Materials by Gas Chromatography-Mass Spectrometry Method

Pige Kexue Yu Gongcheng
A gas chromatography-mass spectrometry (GC-MS) method was developed for the simultaneous determination of quinoline, pyridine, and crotonaldehyde in footwear materials.
Yuhong TANG, Xiaochun WEI, Jianwei ZENG, Jianfeng ZHOU, Li ZHU   +4 more
doaj   +1 more source

Synthesis and characterization of novel polyimides derived from 4,4’-bis(5-amino-2-pyridinoxy)benzophenone: effect of pyridine and ketone units in the main

Designed Monomers and Polymers, 2017
A diamine monomer, 4,4’-bis(5-amino-2-pyridinoxy)benzophenone, was designed and synthesized, and used to react with commercially different kinds of aromatic dianhydrides to prepare a series of polyimides containing pyridine and ketone units via the ...
Chunbo Wang, Xiaogang Zhao, Dongbo Tian, Daming Wang, Chunhai Chen, Hongwei Zhou   +5 more
doaj   +1 more source

Structural and biochemical insights into the thermostable esterase Ta0887 from Thermoplasma acidophilum

FEBS Open Bio, EarlyView.
In this study, a novel esterase from the thermoacidophilic archaeon Thermoplasma acidophilum was biochemically and structurally characterized. Our results demonstrate that Ta0887 is a highly thermostable esterase that preferentially hydrolyzes p‐nitrophenyl hexanoate and possesses an α‐helical cap domain that likely contributes to its substrate ...
Alejandro Delgado‐Rey, Miriam Livier Llamas‐García, Gabriela M. Montero‐Morán, Leticia Santos, Samuel Lara‐González   +4 more
wiley   +1 more source

N′-[(1E)-4-Hydroxy-3-methoxybenzylidene]isonicotinohydrazide monohydrate

IUCrData, 2016
In the title hydrate, C14H13N3O3·H2O, the dihedral angle between the pyridine and benzene rings is 2.52 (9)°. Intramolecular O—H...O hydrogen bonds occur.
K. R. Roopashree, Bharathkumar Inturi, Gurubasavaraj V. Pujar, S. R. Prem Kumar, H. C. Devarajegowda   +4 more
doaj   +1 more source

Scientific Opinion on Flavouring Group Evaluation 77, Revision 2 (FGE.77Rev2): Consideration of Pyridine, Pyrrole and Quinoline Derivatives evaluated by JECFA (63rd meeting) structurally related to Pyridine, Pyrrole, Indole and Quinoline Derivatives evaluated by EFSA in FGE.24Rev2 (2013) [PDF]

EFSA Journal, 2015
The Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids of the European Food Safety Authority was requested to consider evaluations of flavouring substances assessed since 2000 by the Joint FAO/WHO Expert Committee on Food Additives
EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids (CEF)
doaj   +1 more source