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Главная Коллекция "Otherreferats" Химия
  • 181. Investigations of bis-chromophore systems: relationship between spectral behaviour and charge transfer in 2-(3-coumaroyl)-benzopyrylium perchlorates

    The dependence of spectral properties and interfragmental charge transfer on excitation, relaxation and excited state deactivation of 2-(3-coumaroyl)-benzopyrylium perchlorates. The positions of emission bands and rate constants of radiationless.

    статья (306,2 K)
  • 182. Ion exchange properties of irradiated and chemically modified clinoptilolite regarding to Cs+ and Sr2+

    The study of ion-exchange sorption of CS+ and sr2+ on clinoptilolite in original, modified e- and G-irradiation, decationated with hydrochloric acid, and the cation-contained form, the definition of the coefficient of sorption and distribution of KD, KS.

    статья (212,3 K)
  • 183. Ionexchanged film materials from oligoepichlorohydrine epoxide and piperazine

    Film materials with ion-exchange properties based on polymer obtained by condensation of oligoepichlorohydrin epoxide and piperazine with chemical modification. Compounds that have different thermodynamic affinities with the polymer and with each other.

    статья (363,6 K)
  • 184. Ionic liquids for promising ion-conducting polymer materials of electrochemical devices

    Synthesis methods development of ionic liquids based on quaternary ammonium salts, their application as components of the polymeric electrolytes for electrochemical devices. Рroperties of liquids depending on the structure of cationic and anionic parts.

    статья (544,1 K)
  • 185. Ionically and covalently cross-linked hydrogel particles based on chitosan and polyethylene glycol

    Scheme of oligoperoxide structures at different pH values. Ionically and covalently cross-linked hydrogel particles based on chitosan, polyethylene glycol. The presence of peroxide groups in the oligoperoxides. The preparation of submicron reagents.

    статья (813,4 K)
  • 186. Isolation and characterization acidithiobacill us ferrooxidans and a cidithiobacill us ferrivorans from the arsenopyrite flotation concentrate in Kazakhstan

    Identification and characterization of phenotypic characteristics. Phylogenetic analysis of 16S rRNA genes, results of general chemical analysis of Bestobe deposits. Effect of different arsenic concentrations on the oxidative capacity of isolated strains

    статья (838,3 K)
  • 187. Isothiazolium Salts and Their Use as Components for the Synthesis of S, N-Heterocycles

    Benzisothiazolium Salts. Heterocyclic Annulated Isothiazolium Salts. Structure. X-ray Diffraction. Molecular Spectra. Analytical methods. Reactivity, general survey. Oxidation to Sultims and Sultams. Ring Transformation in Other Heterocyclic Compounds.

    статья (598,7 K)
  • 188. Iммобілізація ліполітичних і протеолітичних ферментів та сульфамідних лікарських препаратів на полімерних носіях

    Вивчення співполімеризації синтезованих біологічно активних сульфамідних мономерів i терполімерів. Синтез фермент-полімерних комплексів на основі ліполактину. Створення лікарських препаратів поліфункціональної дії. Утворення тривимірної просторової сітки.

    автореферат (37,8 K)
  • 189. KDP crystals modified with organic molecules: luminophore embedding criteration

    Experimental study results on the conditions of KDP single crystal growing doped by organic luminophors have been presented. Shows a possible coherent conjugation scheme for crystal-chemical parameters of KDP lattice with some organic luminophors.

    статья (203,3 K)
  • 190. Kinetic regularities of the early stages of sol-gel process in tetraethoxysilane-based systems

    Research kinetic characteristics of the initial stages of the processes of acid hydrolysis and condensation in the sol-gel systems tetraethoxysilane, ethanol-water by gas chromatography. Using quantum-chemical calculations hydrolysis parameters.

    статья (351,1 K)
  • 191. Kinetic regularity of the formation of Fe (II)–Fe (III) LDH structures (Green Rust) on the steel surface in presence of the FeSO4 and Fe2(SO4)3 water solutions

    The kinetic of origin and transformation of the Fe(II)–Fe(III) LDH structures on the steel electrodes surface contacting with FeSO4 and Fe2(SO4)3 dispersion medium of the air oxygen into the system was studied. X-ray diffraction method of investigation.

    автореферат (2,1 M)
  • 192. Kinetics of diffusion mass transfer during filtration drying of grain materials

    Еxperimental investigations concerning coefficient of moisture pore diffusion from grain during filtration drying. The coefficient of pore diffusion the model was used basing on the solution of differential equation under boundary conditions of the type.

    статья (356,0 K)
  • 193. L-ментол, рицинолевая кислота и 4-метилтетрагидропиран в направленном синтезе эндо- и экзогормонов насекомых

    Направленный синтез низкомолекулярных биорегуляторов насекомых. Химические превращения производных 4-метилтетрагидропирана, l-ментола и рицинолевой кислоты. Синтез эндо- и экзогормонов насекомых на основе продуктов алкилирования ацетоуксусного эфира.

    автореферат (455,9 K)
  • 194. Light scattering by silver nanoparticles in colloid solutions for improved photovoltaic devices

    Incorporation of metal nanoparticles into photovoltaic cells attracts much attention last years as a promising way for efficiency improvement by light trapping. Direction of light scattering and a red shift of light scattering efficiency maxima.

    статья (487,9 K)
  • 195. Mathematical model analysis of graphene oxide thermal development

    Study of the changes in the crystal structure of the material during thermal treatment and the effects of these changes on the properties of the material. Possibility of prediction of the changes of graphene oxide material during thermal processing.

    статья (19,4 K)
  • 196. Mecamylamine modulates epileptiform discharges in low-Mg2+ model of epilepsy

    Mecamylamine - a nonselective antagonist of nicotinic acetylcholine receptors that was developed as an antihypertensive medication. Application of mecamylamine - one of the processes that decreased inter-event intervals between continuous discharges.

    статья (74,1 K)
  • 197. Mechanism and kinetic regularities of inactivating effects of cavitation on microorganisms

    Study of the disinfecting effect of the physical and chemical properties accompanying hydrodynamic cavitation on the sanitary index of microorganisms in water. Model for determining the result of disinfection in conditions of hydrodynamic cavitation.

    статья (674,5 K)
  • 198. Metabolism of lipoids

    Structure, a composition, a biological role, synthesis and catabolism of phospholipids. Conversion of Squalene to Cholesterol. Determination of interdependence of the deficiency of hydrolytic enzymes and lysosoms support sphingolipidosis development.

    презентация (132,6 K)
  • 199. Methods for the determination of ammonium ions

    Control of the stability of calibration characteristic Algorithm of operational control of the error of determination of ammonium ions in drinking water. Photocolorimetric determination of ammonium ion content. Precautions when performing the analysis.

    реферат (39,6 K)
  • 200. MgH2 insights for hydrogen storage and catalysis: preparation, characterization and mechanism

    The preparation methods, characterization methods and reaction basis of various catalysts modified by MgH2. Analysis of the development trend of various catalysts in the future and the application prospects. The most promising hydrogen storage media.

    статья (132,9 K)
  • 201. Micellization and adsolubilization of amphiphilic invertible polyesters

    Using measurements of surface tension, solubilization, and fluorescence spectroscopy, the detection of polyesters based on aliphatic dicarboxylic acids and PEG-1000 to form monomolecular micelles in aqueous solutions at the concentrations of 10-7-10-4 %.

    статья (231,4 K)
  • 202. Microencapsulation of camphor in calcium alginate for using in fabric finishing as fragrance and antibacterial finishing

    Study of antibacterial properties of tissue obtained by ionotropic gelation of sodium alginate. Calculation of the diameter of microcapsules using the software Image J. Gas chromatography of the surface of tissue, finished with microencapsulated camphor.

    статья (3,0 M)
  • 203. Microwave irradiation for accelerating organic reactions – part II: six-, seven-membered, spiro, and fused heterocycles

    Heterocycles with one, two, three and four heteroatoms. Fused heterocycles incorporating pyridine rings. Quinolines, isoquinolines, and their fused rings. Spiroheterocycles and a solvent-free one-pot reaction of a mixture of meldrum’s or barbituric acid.

    учебное пособие (867,0 K)
  • 204. Microwave-assisted preparation of sodium-silicate solutions from perlite

    Systematic studies on the preparation of sodium silicate solutions of different compositions via the hydrothermal microwave treatment of perlite with an NaOH solution. The effect of various factors on the degree of SiO2 recovery and the reaction rate.

    статья (143,7 K)
  • 205. Modeling effect of the main synthesis parameters on the properties of carboxymethyl cellulose

    Carboxymethyl cellulose as the one of largest and most widely used ether. Creating a uniform distribution of reagents in the area of chemical reactions - the process which underlying the modeling of macrokinetics carboxymethylation of cellulose.

    статья (65,0 K)
  • 206. Modeling of mass transfer process’ kinetics during dyeing and printing of textile fibers

    Obtaining an idea of the averaged molecular field characterizing the interaction of the sorbent molecule with the surface of the sorbent. Making an attempt to calculate the interaction energy in the case of sorption of non-polar adsorbent molecules.

    статья (70,6 K)
  • 207. Modeling of the Mechanism of Phase Transitions in ZrO2 with Small Additions of In2O3 at High Temperatures in a Vacuum

    Study crystallographic sequence of the phase transition in zirconium dioxide at heated. The transformation of monoclinic phase in tetragonal modification. The appearance of new anion vacancies, which form at evaporation of the oxygen from the lattice.

    статья (458,2 K)
  • 208. Modification of aluminum alloy 1933 by the high-current electron beam irradiation

    Development of a thermal model describing the beam-metal, the features of the hyperbolic relaxation of the equation of heat transfer. Characterization of failure mechanisms for irradiated and non-irradiated sample, the changes in their structure and chemi

    статья (466,4 K)
  • 209. Molecular structures

    Molecular geometry - the general shape of a molecule or the arrangement of atoms in three dimensional space. Physical and chemical properties of an atom. Main examples of predicting molecular geometry. The valence shell electron and her repulsion.

    презентация (1,7 M)
  • 210. Morphological and electronic characteristics of nanoalumina alone and in high-temperature (fumed) and low-temperature (mechanical) mixtures with nanosilica

    Crystalline and electronic structures of nanoalumina alone and in different mixtures with nanosilica. X-ray diffraction and ultrasoft X-ray emission spectroscopy. Pore size distributions calculated. Resalts of the OKa emission bands of alumina in samples.

    статья (301,4 K)

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