Güncel Gönderiler: Kimya-Makale Koleksiyonu
Toplam kayıt 676, listelenen: 161-180
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Purification, characterization, and investigation of in vitro inhibition by metals of paraoxonase from different sheep breeds
(Taylor & Francis Ltd, 2013)Paraoxonase (PON) was purified and characterized from the Merino and Kivircik sheep's blood serums by a two-step procedure using ammonium sulphate precipitation and Sepharose-4B-L-tyrosine-1-napthylamine hydrophobic ... -
Online preconcentration system using 6-(2-thienyl)-2-pyridine carboxaldehyde functionalized Amberlite XAD-4 resin for the determination of trace elements in waters by flame atomic absorption spectrometry
(AOAC Int, 2013)An online flow injection method was developed for the determination of trace elements in waters using 6-(2-thienyl)-2-pyridinecarboxaldehyde functionalized Amber lite XAD-4 resin. The metals were eluted with 1.0 M HNO3 ... -
Surface properties of catalase and casein on kaolinite and design of experiments
(Elsevier Ltd, 2013)In this study, the adsorption and electrokinetic properties of biomolecules on kaolinite were studied as a function of incubation time, temperature, and concentrations of biomolecules, and pH of the solution. Catalase ... -
Investigation of heavy metal effects on immobilized paraoxanase by glutaraldehyde
(Informa Healthcare, 2013)Serum paraoxonase 1 (PON1) was purified from bovine serum using hydrophobic interaction chromotography on Sepharose 4B-coupled L-tyrosine 1-naphthylamine gel, and monitored by sodium dodecyl sulfate polyacrylamide gel ... -
Preparation and characterization of poly(vinylalcohol)/modified bentonite nanocomposites
(Elsevier Inc, 2013)This study describes an effective way for the preparation of well-dispersed poly(vinylalcohol) (PVA)/bentonite and poly(vinylalcohol)/modified bentonite nanocomposites with improved thermal properties. Nanocomposites were ... -
Spectrometric determination of copper in edible oil based on the extraction with N, N′-bis(5-methoxy-salicylidene)-2-hydroxy-1,3-propanediamine
(Karger, 2013)A new method for the determination of copper in edible oils was suggested. The proposed method is based on the extraction of copper with N,N'-bis(5-methoxy-salicylidene)-2-hydroxy-1,3-propanediamine (5MSHP) followed by ... -
Synthesis, spectral studies and complexation properties of N,N′-bis(5-bromo-salicylidene)-2-hydroxy-1,3-propanediamine (BSHP) and iron extraction with BSHP from oils
(Maik Nauka Publishing / Springer SBM, 2013)A Schiff base was synthesized by reaction of 1,3-diamino-2-propanol and 5-bromo-2-hydroxy benzaldehyde. The Schiff base N,N′-bis(5-bromo- salicylidene)-2-hydroxy-1,3-propanediamine (BSHP) was characterized by elemental ... -
Extraction and biological activity of total anthocyanins from sweet cherry cultivars as polyphenol oxidase inhibitors
(WFL Publisher Ltd., 2013)Total anthocyanins were extracted from six sweet cherry cultivars grown in Sakarya, Turkey, and their inhibitory effects on the diphenolase activity of banana polyphenol oxidase (PPO) were evaluated. The PPO was purified ... -
Experimental and computational studies on the 1:1 complex of anthranilic acid with p-toluenesulfonic acid
(2013)The proton-transfer compound (3) was synthesized in good yields by the reaction of anthranilic acid with p-toluenesulfonic acid. It was characterized by elemental analysis, infrared spectroscopy, and X-ray single-crystal ... -
Adsorption behavior of victoria blue dye on halloysite nanotubes from aqueous solutions
(Parlar Scientific Publications (P S P), 2015)This study examines the adsorption and electrokinetic properties of victoria blue dye (VB) onto halloysite nanotubes from aqueous solutions. The adsorption of VB was studied with batch experiments. Equilibrium was rapidly ... -
Characterisation and optical vapour sensing properties of PMMA thin films
(Elsevier Science Bv, 2009)The present article reports on the characterisation of spin coated thin films of poly (methyl methacrylate) (PMMA) for their use in organic vapour sensing application. Thin film properties of PMMA are studied by UV-visible ... -
Differential in vitro inhibition of polyphenoloxidase from a wild edible mushroom Lactarius salmonicolor
(Taylor & Francis Ltd, 2009)The polyphenol oxidase (LsPPO) from a wild edible mushroom Lactarius salmonicolor was purified using a Sepharose 4B-L-tyrosine-p-amino benzoic acid affinity column. At the optimum pH and temperature, the KM and VMax values ... -
Supramolecular lead(II) azide complex of 2,6-diacetylpyridine dihydrazone: Synthesis, molecular structure, and biological activity
(Taylor & Francis Ltd, 2009)The complex of 2,6-diacetylpyridinedihydrazone (L) with lead(II) and azide has been characterized by elemental analyses, FTIR, and single-crystal X-ray analysis. The Pb(C9H13N11) (1) crystallized in the monoclinic space ... -
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 ...
