Güncel Gönderiler: Kimya Bölümü
Toplam kayıt 724, listelenen: 461-480
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Spectrophotometric determination of tartrazine, riboflavine and carmoisine in drinks by zero-order spectrophotometric method using determinant calculation and first derivative spectrophotometric method
(Mrs Pushpa Agarwal, 2005)Two very simple spectrophotometric methods are described for resolving binary and ternary mixtures of the food colorants tartrazine, carmoisine and riboflavine using the absorption and the first derivative spectra. Calibration ... -
Solid-phase extraction and spectrophotometric determination of trace amounts of mercury in natural samples
(Springer Wien, 2005)A sensitive and selective solid phase spectrophotometric method for the determination of trace amounts of inorganic mercury is described. Hg2+ was sorbed on a silica gel-packed column as an Hg2+-N,N'- bis(2-mercaptopheny ... -
Solubility of chlorine in aqueous hydrochloric acid solutions
(Elsevier Science Bv, 2005)The solubility of chlorine in aqueous hydrochloric acid solutions was studied. The effects of HCl concentration and temperature on the solubility were evaluated, and the thermodynamic parameters of the dissolution were ... -
Characterization and purification of polyphenol oxidase from artichoke (Cynara scolymus L.)
(Amer Chemical Soc,, 2005)In this study, the polyphenol oxidase (PPO) of artichoke (Cynara scolymus L.) was first purified by a combination of (NH4)(2)SO4 precipitation, dialysis, and a Sepharose 4B-L-tyrosine-p-aminobenzoic acid affinity column. ... -
Low and high temperature bromination of exocyclic dienes: high temperature bromination. Part 16
(Pergamon-Elsevier Science Ltd, 2003)The electrophilic addition of bromine to an exocyclic diene, 5,6-dimethylenebicyclo[2.2.1]hept-2-ene, in CCl4 at 0degreesC led to the formation of non-rearranged (73%) and rearranged products (27%). However, high temperature ... -
Poly(methyl methacrylate) films for organic vapour sensing
(Iop Publishing Ltd, 2003)Optical constants and fabrication parameters are investigated using surface plasmon resonance (SPR) studies on spun films of poly(methyl methacrylate) (PMMA) derivatives in contact with two different dielectric media. A ... -
Spectrophotometric determination of molybdenum with Alizarin Red S in the presence of poly(sulfonylpiperidinylmethylene hydroxide)
(Elsevier Science Bv, 2003)The present work describes a selective and rapid method for the determination of molybdenum with Alizarin Red S (ARS) in the presence of a water soluble polymer, poly(sulfonylpiperidinylmethylene hydroxide) (PSPMH). The ... -
Crystal structure of [2,6-bis(3,5-dimethyl-N-pyrazolyl)pyridine](azido)(chloro)copper(II)
(Japan Neurosurgical Soc, 2003)In the title compound, the coordination around the Cu atom is a distorted square-pyramid involving three N atoms from the ligand and one N atom from the azido group at the basal plane. The Cl atom is located at the apical ... -
Synthesis and crystal structure of linear chain homotetranuclear complexes with N-3(-)
(Marcel Dekker Inc, 2003)Mononuclear copper(II) complexes, Cu(L) [N,N'-bis(salicylidene)-1,3-propanediaminato]copper(II), and Cu(LDM) [N,N'-bis(salicylidene)2,2'-dimethyl-1,3-propanediaminato]copper(II), were prepared from the ONNO type ligands ... -
Carbonic anhydrase from Cyprinus carpio
(Elsevier GMBH, 2003)Carbonic anhydrase (CA) is the basic enzyme in the breathing function and catalyses the reversible hydration of CO2 to HCO3- and H+.A method is introduced to purify the carbonic anhydrase from erythrocytes of the carp ... -
Adsorption kinetics of methyl violet onto perlite
(Pergamon-Elsevier Science Ltd, 2003)This study examines adsorption kinetics and activation parameters of methyl violet on perlite. The effect of process parameters like contact time, concentration of dye, temperature and pH on the extent of methyl violet ... -
Adsorption kinetics of victoria blue onto perlite
(Parlar Scientific Publications (P S P),, 2003)The effects of various experimental parameters such as initial dye concentration, temperature and pH on adsorption capacity of victoria blue on perlite have been investigated. The extent of dye removal increased, with the ... -
Cloning, characterization and anion inhibition study of a beta-class carbonic anhydrase from the caries producing pathogen streptococcus mutans
(Pergamon-Elsevier Science Ltd, 2015)The oral pathogenic bacterium involved in human dental caries formation Streptococcus mutans, encodes for two carbonic anhydrase (CA, EC 4.2.1.1) one belonging to the alpha- and the other one to the beta-class. This last ... -
Preconcentration and determination of manganese in water samples using N,N '-bis(2-hydroxy-5-bromo-benzyl)1,2 diaminopropane
(Marcel Dekker Inc, 2003)The synthesis and analytical applications of N,N'-bis(2-hydroxy-5-bromobenzyl)1,2 diaminopropane (HBDAP) are described. The investigation includes a study of the characteristics that are essential for solvent extraction ... -
A novel silver recovery method from waste photographic films with NaOH stripping
(Scientific Technical Research Council Turkey, 2003)A novel, simple, fast, cheap and pollution-free method was developed for recovering the silver from waste X-ray photographic films with NaOH stripping. The method has a number of advantages because it obviates the need for ... -
Synthesis and evaluation of new phthalazine substituted beta-lactam derivatives as carbonic anhydrase inhibitors
(Maik Nauka / Interperiodica / Springer, 2015)A new series of phthalazine substituted beta-lactam derivatives were synthesized and their inhibitory effects on the activity of purified human carbonic anhydrase (hCA I and II) were evaluated. 2H-Indazolo[2,1-b]phthalazine-trione ... -
Synthesis, crystal structure and electrochemical behaviour of [2,6-bis(3,5-dimethylpyrazolyl)pyridine](dithiocyanato)cobalt(II)
(Oldenbourg Verlag, 2003)A mononuclear cobalt(II) complex, [Co(dmpp)(SCN)(2)], was synthesized using 2,6-bis (3,5-di-methylpyrazolyl)pyridine (dmpp) and thiocyanate anion (SCN), and characterized by IR spectroscopy and single-crystal X-ray ... -
Sorption of acid red 57 from aqueous solution onto sepiolite
(Elsevier Science Bv, 2004)Sepiolite, a highly porous mineral, is becoming widely used as an alternative material in areas where sorptive, catalytic and rheological applications are required. High ion exchange capacity and high surface area and more ... -
Purification of mulberry (Morus alba L.) polyphenol oxidase by affinity chromatography and investigation of its kinetic and electrophoretic properties
(Elsevier Science Bv, 2004)Polyphenol oxidase (PPO) was isolated from mulberry (Morus alba L.) fruit using a Sepharose 4B-L-tyrosine-p-amino benzoic acid affinity column. The purified enzyme was migrated as a single band on native and SDS-poliacrylamide ... -
Highly selective separation and determination of mercury(II) using N,N '-bis(2-mercaptophenyl)ethanediamide
(Marcel Dekker Inc, 2004)The present work describes a selective and economical method for the determination of mercury using N,N'-bis(2-mercaptophenyl)ethanediamide (H2L). The investigation included a study of the characteristics that are essential ...
