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Determination of trace element contents of Thymus species from Turkey
Thymus species trace elements minerals atomic absorption spectrometry microwave digestion
2010/12/20
Eleven mineral and trace elements (Mg, Ca, K, Fe, Mn, Al, Zn, Cu, Cd, Ni, and Pb) were determined in the Thymus species growing in Turkey. The total concentrations were measured in samples mineralized...
Nile Blue-hexacyanoferrate carbon paste modified electrode as an amperometric sensor for determination of hydrazine
Modified electrode carbon paste electrode hexacyanoferrate amperometric determination of hydrazine Nile-Blue hexacyanoferrate
2010/12/20
The main problem associated with metal hexacyanoferrates (MHCFs) is their instability at high pH values. We synthesized a new Prussian Blue analogue, Nile-Blue hexacyanoferrate (NBHCF), that remains s...
Synthesis and surfactant properties of N-acylation compounds derived from hydrolysis degradation products of N-(b-cianoethyl)-e-caprolactam
N-acylation surfactants 4-azasebacic acid N-(b -cianoethyl)-e -caprolactam critical micelle concentration surface tension foaming
2010/12/20
N-acyl amino acids can be used as active surface agents in the detergents industry, as well as in the pharmaceutical industry and cosmetics. Properties of these compounds are superior to those of fatt...
Vapor phase alkylation of toluene using various alcohols over H3PO4/MCM-41 catalyst: influence of reaction parameters on selectivity and conversion
Alkylation toluene mesoporous MCM-41 vapor phase H3PO4
2010/12/20
A mesoporous MCM-41 molecular sieve material with a molar ratio of SiO2/Al2O3 = 70 and loaded with H3PO4 was used as a catalyst for the alkylation of toluene, using various alcohols, namely methanol, ...
Reactions of 4-benzoyl-1,5-diphenyl-1H-pyrazole-3- carboxylic acid chloride with various hydroxylamines and carbazates
Pyrazole-3-carboxylic acid nucleophilic substitution furan-2,3-dione carbazate hydroxylamine
2010/12/20
The 1H-pyrazole-3-carboxylic acid 2 was converted via reactions of its acid chloride 3 with various hydroxylamine 4a-f and carbazate derivatives 8a-c into the corresponding novel N-substituted-4-benzo...
Ethyl 5-oxo-3-arylamino-2,5-dihydroisoxazole-4- carboxylates as sources of imidazopyrimidine and aminoindole derivatives
Isoxazolones 2-chloropyrimidine 2-chlorobenzoxazole rearrangements imidazopyrimidines aminoindoles
2010/12/20
The reaction of ethyl 5-oxo-3-arylamino-2,5-dihydroisoxazole-4- carboxylates with 2-chloropyrimidine and 2-chlorobenzoxazole gave the corresponding isoxazolones with pyrimidine and benzoxazole rings s...
阻燃型醋酸乙烯酯共聚乳液的制备及阻燃性能研究
醋酸乙烯酯 丙烯酸丁酯 无卤阻燃 热稳定性能
2011/12/26
以聚磷酸铵和季戊四醇复配对丙烯酸丁酯-醋酸乙烯酯共聚乳液进行阻燃研究.通过极限氧指数(LOI)、垂直燃烧和热重分析等手段,对材料的燃烧性能以及热降解行为进行研究,采用扫描电镜对碳层结构进行表征.最佳LOI值可达28.9,并通过垂直燃烧V- 0级别;同时,高温阶段碳层重量得到明显提高,且结构稳定.
Chemical composition and antimicrobial activity of the essential oils of mosses (Tortula muralis Hedw., Homalothecium lutescens (Hedw.) H. Rob., Hypnum cupressiforme Hedw., and Pohlia nutans (Hedw.) Lindb.) from Turkey
Tortula muralis Homalothecium lutescens Hypnum cupressiforme
2010/12/3
The essential oils of mosses [Tortula muralis Hedw. (Pottiaceae), Homalothecium lutescens (Hedw.) H. Rob. (Brachytheciaceae), Hypnum cupressiforme Hedw. (Hypnaceae), and Pohlia nutans (Hedw.) Lindb. (...
Solid phase extraction of copper, nickel, and cobalt in water samples after extraction using surfactant coated alumina modified with indane-1,2,3-trione 1,2-dioxime and determination by flame atomic absorption spectrometry
Solid phase extraction surfactant coated alumina atomic absorption spectrometry
2010/12/3
A simple method for simultaneous pre-concentration of Cu, Ni, and Co metal ions prior to their determination by flame atomic absorption spectrometry is reported. The method is based on the extraction ...
Effect of various substituents on intramolecular 1,1-vinylboration, synthesis of 1-silacyclobutene derivatives
organoboration silacyclobutenes NMR
2010/12/3
The reaction of 1-boryl-1-alkenyl chlorosilane derivatives with alkynyllithium reagents [Li-C\equiv C-R3 (R3~=~Ph, SiMe3)] at low temperature (--78 °C) affords alkenyl(alkyn-1-yl)silanes. These compou...
Synthesis and crystal structure of a novel multimodal ligand, 6,6'-bis(2-(di(pyridin-2-yl)methylene)-1-methylhydrazinyl)-2,2'-bipyridine, and its copper(I) complex, {[Cu3L2](PF6)3° 3H2O} (1)
dipyridyl ketone metal complexes N-donor ligands
2010/12/3
The single crystal X-ray structure of the novel multimodal ligand 6,6'-bis(2-(di(pyridin-2-yl)methylene)-1-methylhydrazinyl)-2,2'-bipyridine, C34H28N10 (L), was determined at 120 (2) K. The ligand pos...
Synthesis and characterisations of some new 2,4-dihydro-[1,2,4]- triazol-3-one derivatives and X-ray crystal structures of 4-(3-phenylallylideneamino)-5-thiophen-2-yl-methyl-2,4-dihydro-[1,2,4]triazol-3-one
bromo acetophenone X-ray crystallography antimicrobial activity
2010/12/3
Compounds 2 were synthesised via the reaction of 4-amino-5-thiophen-2-yl-methyl-2,4-dihydro-[1,2,4]-triazol-3-one (1) with aldehydes. Compounds 3 and 4 were obtained from compounds 2 with bromo acetop...
Bromodimethylsulfonium bromide/tetrabutylammonium nitrite: an efficient catalyst mixture for the nitration of phenols
Bromodimethylsulfonium bromide nitration nitrophenol tetrabutylammonium nitrite
2010/12/3
Nitrophenols were obtained via direct nitration of phenols with tetrabutylammonium nitrite in the presence of bromodimethylsulfonium bromide at room temperature in high yields under aprotic conditions...
Synthesis and super-swelling behavior of a novel low salt-sensitive protein-based superabsorbent hydrogel: collagen-g-poly(AMPS)
Collagen hydrogel swelling 2-acrylamido-2-methylpropanesulfonic acid
2010/12/3
Superabsorbent polymers are obtained by the graft copolymerization of 2-acrylamido-2-methylpropanesul- fonic acid (AMPS) monomer onto collagen, using ammonium persulfate as a free radical initiator in...
Co(III) catalysed asymmetric ring-opening of epichlorohydrin by salicylaldehyde derivatives: reversal of enantioselectivity and rate acceleration on addition of AlCl3
Asymmetric catalysis salicylaldehyde Co(III) salen aryloxy alcohols epoxide ring-opening
2010/12/3
Using asymmetric Cobalt(III) salen catalysts, the ring-opening of epichlorohydrin by 2,3-dihydroxybenzal- dehyde and 2,4- dihydroxybenzaldehyde was found to occur at the phenolic groups most distant f...