Güncel Gönderiler: Kimya Bölümü
Toplam kayıt 724, listelenen: 181-200
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Total synthesis of apigenin glycosides and the effect of these compounds on polyphenol oxidase enzyme activity
(Chemical Publishing Co, 2014)We have succeeded in total synthesis of apigenin 7-O-β-D-cellobioside (1a) and apigenin 7-O-β-D-cellobiosyl-4′-O-β-D-glucopyranoside (1c) via four and six steps in a total yield of 56 and 76 % from naringenin (2), respectively. ... -
The effect of reaction temperature and time on the zeolitisation of natural kaolinite
(Parlar Scientific Publications (P S P), 2009)A locally avaliable kaolinite has been decomposed by the hydrothermal technique. Kaolinite activated at 600 degrees C was subjected to hydrothermal treatment with NaOH solution in aqueous media for different reaction times ... -
Synthesis of thiosemicarbazones as substrates for xanthine oxidase enzyme activity
(Chemical Publishing Co., 2014)Thiosemicarbazones were synthesized from 7-arylbicyclo[3.2.0]hept-2-en-6-ones (1a-d) and thiosemicarbazide. The compounds were purified on a silica gel column chromatography. The thiosemicarbazone compounds were tested in ... -
Superparamagnetic iron oxide nanoparticles: Effect of iron oleate precursors obtained with a simple way
(Springer, 2013)The objective of the study was to investigate the effect of different amounts of iron oleate precursor with different oleic acid amounts on the properties of the synthesised nanoparticles by thermal decomposition. The iron ... -
Synthesis, antielastase, antioxidant and radical scavenging activities of 4-(aza substituted) methylene substituted dihydroxy coumarines
(Informa Healthcare, 2013)A series of some 4-(aza substituted) methylene substituted dihydroxy coumarines were evaluated for their antioxidant and antielastase activities. Different in vitro methodologies such as total reducing power, 1,1-dipheny ... -
Synthesis and theoretical calculations of carbazole substituted chalcone urea derivatives and studies their polyphenol oxidase enzyme activity
(Taylor & Francis Ltd, 2013)Synthesis of carbazole substituted chalcone urea derivatives and their polyphenol oxidase enzyme activity effects on the diphenolase activity of banana tyrosinase were evaluated. Tyrosinase has been purified from banana ... -
Detection of tautomer proportions of dimedone in solution: A new approach based on theoretical and FT-IR viewpoint
(Springer, 2013)Molecular structures of stable tautomers of dimedone [5,5-dimethyl-cyclohexane-1,3-dione (1) and 3-hydroxy-5,5-dimethylcyclohex-2-enone (2)] were optimized and vibrational frequencies were calculated in five different ... -
In situ observation of ninhydrin and phenylhydrazine reaction in solution by FTIR
(Elsevier B.V., 2013)The current work was performed for hydrazone formation reaction of ninhydrin with phenylhydrazine in chloroform by using "background defining method" in FTIR liquid cell. The method allowed following the consumption and ... -
Electrical conductivity properties of boron containing Langmuir-Blodgett thin films
(Springer New York LLC, 2013)Electrical characterisations of Mesitylene-2-boronic acid (MBA), Phenylboronic acid (PBA) and 1-Naphthylboronic acid (NBA) are investigated using C-f and I-V measurements. All materials are used to fabricate Langmuir-Blodgett ... -
Anomeric and rotameric preferences of glucopyranose in vacuo, water and organic solvents
(Springer, 2013)Glucopyranose is the most stable form of glucose in solution. Identification of molecular structure of glucopyranose is very important because of its biological and synthetic significance; it is not an easy task because ... -
Who should study music education? A vocational personality approach
(Routledge Journals, 2013)The main purpose of the current study was to examine the utility and usefulness of Holland's Theory of Personalities in Work Environments to understand the match between personality and the desire for music education. The ... -
Novel functionalized silica gel for on-line preconcentration of cadmium(II), copper(II), and cobalt(II) with determination by flame atomic absorption spectrometry
(Taylor and Francis Inc., 2016)Silica gel functionalized with 2-[N,N'-bis(2,3-dihydroxybenzaldimin)] aminoethylamine was employed as a novel sorbent for preconcentration of copper(II), cobalt(II), and cadmium(II) by flow injection-solid phase extraction. ... -
The Cyano-bridged Pentanuclear Mn(III)(4)Fe(III) Cluster. Structure and Magnetic Properties.
(Int Union Crystallography, 2009)A cyano-bridged Mn(III)–Fe(III) complex, [Mn(L)]2 Fe(CN)6 ](NEt4 )(MeOH)2 (1) (L=N,N′-bis(5- chloro salicylidene)-2,2-dimethyl-1,3-diaminopropane) was prepared and characterized. -
Cyanide-Bridged Mn(III)-Fe(III) Bimetallic Complex. Structure and Magnetic Characterization.
(Int Union Crystallography, 2009)A cyano-bridged Mn(III)–Fe(III) complex, [Mn(L) (MeOH)]2 Fe(CN)6 ](NEt4 ) (1) (L = N,N′-bis(3,5- chlorosalicylidene)-1,2-diaminopropane) have been prepared and structurally and magnetically characterized. -
Manganese(III)-Schiff-Base-Hexacyanoferrate Polymeric Compound. Synthesis, Structure, and Magnetic Properties.
(Int Union Crystallography, 2009)A cyano-bridged Mn(III)–Fe(III) complex, [Mn(L) (H2 O)]2 Fe(CN)6 ](NEt4 ) (1) (L = N,N′-bis(5- chlorosalicylidene)-1,2-diaminopropane) have been prepared and structurally and magnetically characterized. -
Novel Co(II) and Ni(II)-Nitrito Complexes with NNN Type Ligand.
(Int Union Crystallography, 2009)Two novel monomeric [Co(bdmpp)(ONO)2 ] (1), [Ni(bdmpp) (ONO)2 ] (2), (bdmpp=2,6-bis(3,5- dimethylpyrazol)pyridine) complexes have been synthesized and characterized by single crystal X-ray diffraction analysis, ... -
Purification human PON1Q192 and PON1R192 isoenzymes by hydrophobic interaction chromatography and investigation of the inhibition by metals
(Elsevier Science Bv, 2009)In this study, a new purification strategy for human PON1 enzyme was developed using two-step procedures, namely ammonium sulfate precipitation and sepharose-4B-L-tyrosine-9-aminophenantrene hydrophobic interaction ... -
Synthesis and anion binding properties of a urea-based molecular cleft
(Pergamon-Elsevier Science Ltd, 2015)A new urea-based molecular cleft (L) derived from propylene-linked dipodal amine has been synthesized and its binding affinities for anions have been investigated by H-1 NMR and UV-vis spectroscopic titrations in DMSO. The ... -
Efficient removal of cd(II) from aqueous solution by dehydrated hazelnut husk carbon
(Taylor & Francis Inc, 2015)In this study, removal of Cd(II) ions from aqueous solutions by dehydrated hazelnut husk carbon (DHHC) was investigated. In batch adsorption process, effective parameters such as pH, contact time, amount of DHHC, and initial ... -
Paraoxonase 1 phenotype and paraoxonase activity in asthmatic patients
(Iranian Scientific Society Medical Entomology, 2015)Oxidative stress is involved in the pathogenesis of asthma. Paraoxonase 1 (PON1) and arylesterase are esterase enzymes displaying antioxidant characteristics. PON1 activity varies widely among individuals and ethnic groups, ...
