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коллекция "otherreferats"
Главная Коллекция "Otherreferats" Химия
  • 211. S (Сера), Se (Селен), Te (Теллур) – положительные степени окисления

    Примеры реакций с участием SH-формы гидросульфит-иона. Реакции получения кислот (анионов). Окислительно-восстановительные свойства соединений серы (IV). Строение анионов политионовых кислот, особенности ионной жидкости. Катионные формы теллура и селена.

    презентация (1,7 M)
  • 212. s, p, d-элементы, имеющие биологическое значение

    Основные физические и химические свойства натрия, калия, магния и кальция. Важнейшие соединения калия. Способность магния гореть как в воде, так и в атмосфере углекислого газа. Получение, нахождение в природе фосфора, азота, хлора, серы, фтора, йода.

    реферат (80,0 K)
  • 213. S, Se, Te – положительные степени окисления

    Примеры реакций с участием SH-формы гидросульфит-иона. Реакции получения кислот (анионов). Уравнения реакций кислот, оснований и амфотерных гидроксидов. Окислительно-восстановительные свойства соединений серы. Строение анионов политионовых кислот.

    презентация (1,7 M)
  • 214. S-метилметионин: строение, свойства, биологическая роль

    Изучение строения, свойств и биологического значения S-метил-L-метионина (SMM) – аминокислоты, которую ранее относили к витаминоподобным веществам. Различные фармакодинамические эффекты и возможности для применения в клинической практике S-метилметионина.

    статья (38,9 K)
  • 215. Scanning electron microscopic characterization of iron-gall inks from different tannin sources – applications for cultural heritage

    The use of scanning electron microscopy to study the reactivity of iron in yellow color with different iron concentrations. Substantiation of the possibility of applying the archeometric approach in studies of the chemical corrosion of ancient documents.

    статья (1,3 M)
  • 216. Silicium organic coatings for thermal and fireprotection of reinforced concrete

    Research modifications in the process of protective coating forming while heating. Examination of interaction between silicium organic compounds based on the rich polymethylphenylsiloxane. Opportunities of their utilization for high-temperature.

    статья (275,5 K)
  • 217. Silver Nanoparticles as a New Generation of Antimicrobial Prophylaxis

    Quantitative evaluation of the antimicrobial ability of silver nanoparticles in comparison with silver ions, evaluation of the antimicrobial effectiveness of silver nanoparticles when introduced into water-soluble paints, cotton fabrics, fibrous sorbents.

    статья (1,9 M)
  • 218. Social insurance in the Russian Federation the impact of non-nucleotide insertions on thermal stability of DNA G-quadruplexes

    The formation of non-canonical DNA structures as one of the most important elements of gene expression regulation. Characteristic specific features of the basic oligonucleotide sequences and thermal stabilities of the G-rich polynucleotide fragment.

    статья (45,7 K)
  • 219. Solid solutions and thermal transformations in nanosized systems

    Synthesation, physicochemical properties of nanopowders LaPO4-LuPO4-H2O and LaPO4-YPO4-H2O. Investigation of thermal behavior orthophosphate nanosized solid solutions. Discussion results of the experiment, solubility and melting temperatures of systems.

    статья (648,9 K)
  • 220. Some supramolecular nanostructures based on catalytic active nickel and iron heteroligand complexes. Functional models of Ni(Fe) dioxygenases

    The possibility of the supramolecular nano structures formation on the basis of iron and nickel heteroligand complexes. Formation of different supramolecular nanostructures on the basis of nickel and iron heteroligand complexes as models for Ni(Fe)ARD.

    статья (1,7 M)
  • 221. Sorption of vanadium (V) ions by chemically modified chelating adsorbent based on maleic anhydride styrene copolymer and its application to industrial water samples

    The use of a sorbent to study the preliminary concentration of V (V) ions in the liquid phase. Establishment of optimal conditions for sorption. Influence of the concentration of metal ions and the time of reaching chemical equilibrium on sorption.

    статья (1,6 M)
  • 222. Spectral and basic properties of flavones in the ground and excited states

    Determined of the dissociation (deprotonation) constants of flavones in water-methanol mixtures. Research of features hydroxyflavones, which have been the convenient models for exploration of the intramolecular proton transfer in the excited state.

    статья (281,8 K)
  • 223. Spectrophotometric method for palladium determination using 5-hydroxyimino-4-imino-1,3-thiazolidin-2-one and application to the analysis of intermetallides

    The application of a new, simple and rapid spectrophotometric method to the determination of palladium in the intermetallides Yb40Pd38Sn22 and Yb40Pd40Ga20. Interaction of palladium(II) ions with 5-hydroxyimino-4-imino-1,3-thiazolidin-2-one at pH = 5.0.

    статья (105,0 K)
  • 224. Structural peculiarities of the [(2-amino-5-ethyl-1,3,4-thiadiazole)CuCl] complex

    Crystals of the [Cu(C4H7N3S)Cl] (1)-complex were synthesized by solvothermal reaction of 2-amino-5-ethyl-1,3,4-thiadiazole (C4H7N3S) with CuCl in hydrochloric acid solution, and studied by X-ray diffraction. 3D hydrogen-bonded framework in complex.

    статья (370,1 K)
  • 225. Structural Properties of Magnesium Oxide Thin Films Deposited by Spray Pyrolysis Technique

    Consideration of the results of x-ray diffraction of the considered chemical compounds. Structural properties of the films of magnesium oxide. Substantiation of optimum parameters of temperature of synthesis of organic and many inorganic compounds.

    статья (521,4 K)
  • 226. Structural properties of the SnxSy films obtained by the thermal vacuum Co-evaporation

    The temperature dependence of the sulfur and tin vapor. Influence of growth conditions on the morphology of the surface and structural properties of the films with the stoichiometric composition and substrate temperature on their chemical composition.

    статья (574,5 K)
  • 227. Structure and properties of effective Al-Zirconium alloys for electronical purposes

    Characteristics of the methods of improving the electrical properties, the proper maintenance alloys for electrical purposes. Analysis of the influence of heating temperature on microhardness of the types foreign made Aluminium-Zirconium alloy wires.

    статья (1,0 M)
  • 228. Structure of aqueous and non-aqueous electrolyte solutions

    The dissolution of the electrolyte causes a change in the structure of water depending on the nature of dissolved ions. The structural features of aqueous solutions of electrolytes. Temperature, pressure has a influence on the structure of electrolytes.

    статья (48,0 K)
  • 229. Structure refinements of the compounds Pr5Si3 and Zr3Si2

    Silicides of rare earth metals. Crystallographic data for a binary compound in Pr-Si and Zr-Si systems. Study of the structure of the binary compound Zr3Si2. Analytical correction of absorption. Displacement parameters and interatomic distances.

    статья (1,1 M)
  • 230. Study of processes during electrolysis of organic dye solution by means of ion-photon spectrometry

    Spectral composition and quantum yield of radiation of the excited particles sputtered by an ion beam from surfaces of the dried sediment formed on electrodes at the electrolysis of the organic dye were studied by the method of ion-photon spectrometry.

    статья (367,6 K)
  • 231. Study the effect of ammonia addition on the mechanism and properties of electrochemical deposition of silver and nickel alloy

    Ag-Ni alloy films were electrodeposited from an ammonia solution on copper substrates at various material ratios and current densities. Investigation of electrical conductivity and pH, formation of complexes with silver and nickel. X-ray diffraction.

    статья (711,9 K)
  • 232. Studying the processes of sulphates and chlorides extraction from water at low-waste water demineralization technology

    Ion exchange separation of sulfate and chloride with highbasic anionite Сl-species at regeneration solutions treatment for their reiterative use, followed with solutions’ desalination at reverse osmosis plant, and resulting concentrates’ demineralization.

    статья (314,6 K)
  • 233. Substantiation of the composition and methods of quality control for "Genta" ointment with the succinyl tannin antiresistant component

    Analysis of the results of the design and selection of compounds antimicrobial ointments containing gentamicin as the main active ingredient gallotannin and succinyl as a component of antiresistant against multiresistant strain of Pseudomonas aeruginosa.

    статья (328,0 K)
  • 234. Sulfur control in ultra-low sulfur steel refined by ladle furnace-vacuum degassing

    Sulfur - substance that be in the most kinds of steel. Research of influence of ladle furnace reductants in the desulfurization process. Control ultra-low sulfur steel. The chemical degassing in the ladle furnace-vacuum. Maintaining a low sulfur content.

    статья (185,1 K)
  • 235. Super deep penetration - new method of nanoreinforced composites producing based on polymer matrixes

    Effect of the method of mixing isoprene rubber with nanofillers on the properties of nanocomposites. The thermostability of rubber based on isoprene elastomer with MMT. The physical-mechanical properties of rubber based on isoprene elastomer (SRI).

    статья (237,8 K)
  • 236. Surface Plasmon Enhanced Photoluminescence of Rhodamine 6G on Au Nanoparticles 2D Array: Temperature Effects

    Influence of temperature on the photoluminescence of rhodamine deposited on array of the gold nanoparticles was studied. The factor of surface plasmonic enhancement of rhodamine luminescence. Electron-phonon scattering and thermal expansion of the gold.

    статья (541,9 K)
  • 237. Synthesis a new derivatives of benzoxazole

    Using phosphoric acid and phosphor pent oxide as new catalyst for preparing of derivatives of benzoxazole. Use of benzoaxol ring in medicinal chemistry. Synthesis of 1,3-(Benzene-1,3-diyl) bis(benzoxazole). Synthesis of 3-(2-Hydroxynaphthol) benzoxazole.

    статья (395,8 K)
  • 238. Synthesis and antiviral activity of [(9-R1-10-R2-3-R-2-OXO-2H-[1,2,4]-triazino[2,3-c]quinazolin-6-YL)thio] acetamides derivatives with the fragments of carcass amines

    Alkylation of potassium 9-R1-10-R2-3-R-2-oxo-2Н-[1,2,4]triazino[2,3-с]quinazolin-6-thiolates by N-cycloalkyl-(cycloalkylaryl-)-2-chloracetamides. Analizes of indicators of the antiviral activity of compounds 3.2 and 3.14 against influenza type A H3N2.

    статья (530,2 K)
  • 239. Synthesis and biological activity of 3,4-dimethylphenyloxamoyl aminoacids and their salts with D(+)-glucosamine

    Convenient method of synthesis of optically active oxamoylaminoacids. Compounds have significant hepatoprotective, antiinflammatory and immunodepressant activities with low toxicity. Influence of investigated sudstances on rarametrs of specific immunity.

    статья (133,8 K)
  • 240. Synthesis and characterization of NA-JBW zeolite structure from metakaolin

    Obtaining JBW zeolite from hydrogels under hydrothermal conditions by alkaline reaction using NaOH as an activating agent. Orthorhombic space group Pmc21 with unit cell parameters, X-ray powder diffraction. Comprehensive study of the synthetic zeotype.

    статья (748,3 K)

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