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pentane/dichloromethane
Povezava se shrani v odložišče
Stran 1 iz 55 rezultatov
trans-(4-amino-2,2,6,6-tetramethylpiperidine-N4)bis(pentane-2,4-dionato-O, O')(triphenylphosphine-P)cobalt(III) hexafluorophosphate dichloromethane solvate
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Cobalt as a Probe for Zinc in Metalloenzyme Model Compounds? A Comparison of Spectroscopic Features and Coordination Geometry of Four- and Five-Coordinate Complexes. Crystal and Molecular Structures of [Co(eta(3)-Tp(Ph))(eta(2)-Tp(Ph))], [(eta(3)-Tp(Ph))Zn(anthranilate)], and [(eta(3)-Tp(Ph))M(eta(2)-acac)] (Tp(Ph) = Hydrotris(3-phenylpyrazol-1-yl)borate, acac = Pentane-2,4-dionate, and M = Zn, Co).
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The reaction of cobalt(II) perchlorate with 1 equiv each of potassium hydroxide and potassium hydrotris(3-phenylpyrazolyl)borate (KTp(Ph)) leads to the formation of the blood-red bis(ligand) complex [Co(eta(3)-Tp(Ph))(eta(2)-Tp(Ph))]. This compound crystallizes in the monoclinic space group P2(1)/n,
Time-resolved spectroscopic study of the reaction Cl + n-C5H12 --> HCl + C5H11 in solution.
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We study the hydrogen abstraction reaction from pentane by chlorine radicals using four different experimental approaches. We use two different solvents (CH2Cl2 and CCl4) and two different chlorine atom sources (photodissociation of dissolved Cl2 and two-photon photolysis of the solvent) to
Conformational control of benzyl-o-carboranylbenzene derivatives and molecular encapsulation of acetone in the dynamically formed space of 1,3,5-tris(2-benzyl-o-carboran-1-yl)benzene.
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A 1,3,5-substituted benzene platform has been widely used in the fields of supramolecular chemistry and molecular recognition. Here, we show that 1,3,5-tris(2-benzyl-o-carboran-1-yl)benzene 6 exhibits solvent-dependent conformation in the crystalline state. Recrystallization from
Determination of polychlorinated biphenyls in biota samples using simultaneous pressurized liquid extraction and purification.
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In order to reduce time and cost of analysis, a new pressurised liquid extraction method that automatically and rapidly achieves quantitative and selective (i.e., lipid-free) extraction of polychlorinated biphenyls (PCBs) in biota tissues was optimized. It consists of on-line clean-up by inclusion
Microfilter paper method for antipyrine determination in whole blood by high pressure liquid chromatography.
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A method for measuring antipyrine in whole blood collected on filter paper is described. A 6.2-mm diameter disc (1/4 in) is punched out, eluted with distilled water, and then extracted with 5 ml of dichloromethane/pentane (50:50, vol/vol). After reconstitution of the dried residue, reverse-phase
Recombination dynamics and hydrogen abstraction reactions of chlorine radicals in solution.
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We observe chlorine radical dynamics in solution following two-photon photolysis of the solvent, dichloromethane. In neat CH(2)Cl(2), one-third of the chlorine radicals undergo diffusive geminate recombination, and the rest abstract a hydrogen atom from the solvent with a bimolecular rate constant
Behavioural and electrophysiological responses of the malaria mosquito Anopheles gambiae Giles sensu stricto (Diptera: Culicidae) to human skin emanations.
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Behavioural and electrophysiological responses of Anopheles gambiae Giles sensu stricto (Diptera: Culicidae) to human skin emanations collected on glass beads were studied using a dual-port olfactometer and electroantannography. Glass beads to which skin emanations from human hands had been
Evaluation of rapamycin chemical stability in volatile-organic solvents by HPLC.
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Rapamycin or sirolimus is a carboxylic lactone-lactam macrolide with a potent immunosuppressive activity. It can be successfully used to impregnate stents inserted in coronary arteries during surgical applications, preventing fatal infection and rejection adverse effect. The chemical stability of
[Liquid-solid adsorption separation and gas chromatography/mass spectrometry analysis of recycle alkanes in the production of alkyl benzenes].
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A method for qualitative and quantitative analysis of recycle alkanes in the production of alkyl benzenes is proposed in this paper. The mixture was separated into saturated hydrocarbons (alkanes and cyclanes) and aromatics by means of adsorption chromatography with silica gel of 100 mesh-200 mesh
Enantioselective determination of felodipine and other chiral dihydropyridine calcium entry blockers in human plasma.
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A sensitive method for the enantioselective determination of felodipine in human plasma is described. Following alkaline extraction with dichloromethane-pentane, racemic felodipine and its primary pyridine metabolite are simultaneously assayed using capillary gas chromatography on a DB-1 column,
Single-Crystal X-ray Diffraction Studies of Solvated Crystals of C60 Reveal the Intermolecular Interactions between the Component Molecules.
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The solid state structures of seven solvates of C60 (C60•4tetrachloroethylene, C60•2tetrachloroethylene, C60•3benzene, C60•n-pentane, C60•diethyl ether, C60•chlorobenzene, and C60•benzene•dichloromethane) were determined by single-crystal X-ray diffraction at low temperature. At 90 K the fullerene
Analysis of common opiates and heroin metabolites in urine by high-performance liquid chromatography.
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A separation of heroin, 6-monoacetylmorphine, codeine, pholcodine, dihydrocodeine and morphine using a 200 x 2 mm I.D., 3 microns silica column with dichloromethane-pentane-diethylamine-methanol mobile phase is described. Data on the determination of these compounds in a urine matrix based on this
Rapid determination of sparteine and its metabolites in urine.
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A method is presented for the isolation, separation and determination of sparteine and its metabolites in urine. The isolation is based on rapid extraction with dichloromethane and pentane in a glass separator. For the separation and determination, capillary gas chromatography with
Investigation of the impact of organic solvent type and solution pH on the extraction efficiency of naphthenic acids from oil sands process-affected water.
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Naphthenic acids (NAs) from oil sand process-affected water (OSPW) were liquid-liquid extracted using six organic solvents (n-pentane, n-hexane, cyclohexane, dichloromethane, ethyl ether, and ethyl acetate) at three pHs (2.0, 8.5, and 12.0). The NAs exist in ionic (ions) and non-ionic (molecules)
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