- Depolymerization of alkaline lignin over mesoporous KF/: γ -Al2O3
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As a kind of biomass resource, lignin is the only natural renewable resource that can provide abundant aromatic compounds, which is undoubtedly considered as the best candidate to produce value-added chemicals by lignin depolymerization. Thus, it is of great significance to develop approaches that are able to accommodate the complex structure of lignin. Herein, an efficient depolymerization method is implemented in methanol using a mesoporous solid superbase KF/γ-Al2O3 catalyst. Research shows that the depolymerization of lignin is not obvious below the critical temperature of methanol, and the conversion of lignin increases significantly above the critical temperature, which can reach 60.6% at 270 °C. Phenols and methoxy-substituted monocyclic aromatic compounds are predominant in the liquid products acquired by gas chromatography/mass spectrometry. Furthermore, oligomers were analyzed by time-of-flight mass spectrometry equipped with electrospray ionization. It is found that the molecular mass of the oligomers varied between 200 and 600 Da, the degree of unsaturation is mainly 4 and 8 with 1-2 aromatic rings, and the carbon number is found to be within the range of 15-30. It is speculated that the oligomers are mainly monophenyl or biphenyl compounds containing branched chains.
- Guan, Yinshuang,Zhao, Wei,Liu, Kaishuai,Guo, Tiantian,Wang, Dingkai,Cui, Mingyu,Fu, Shuiyuan,Fan, Xing,Wei, Xianyong
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Read Online
- New Phase Transition at 155 K and Thermal Stability in KHCO3
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The differential scanning calorimetry and thermogravimetry of KHCO3 indicate new transformation anomalies at 155 K (Tc2), 373 K (Td) and 459 K. The former anomaly is likely to be caused by a structural phase transition, but the latter two anomalies are related to the thermal decomposition. The chemical reaction begins at about 373 K (Td) and reaches a complete thermal decomposition of KHCO3 into K2CO3 around 459 K. The experimental results are discussed in terms of protonic intrabond and interbond jump.
- Lee, Kwang-Sei,Kim, Ill Won
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Read Online
- Characterization of zinc carbonate hydroxides synthesized by precipitation from zinc acetate and potassium carbonate solutions
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Addition of potassium carbonate solution to zinc acetate solution at room temperature causes the precipitation of a white solid, whose composition and structure depend on the initial concentrations of the reagents. Hydrozincite, Zn5(CO3)2(OH)6, forms when the K2CO3 concentration is low and a new K-containing zinc carbonate hydroxide phase forms when the K2CO3 concentration is high. The chemical formula of the new phase has been determined to be Zn(CO3)0.61(OH)0.78·0.233K 2CO3 by TGA, CHNO and AA analysis. The new phase is insoluble in water and extensive water washing of the new phase does not change its composition or structure, suggesting the new phase is a single phase compound salt. Exposure of the new phase to a stream of humidified CO 2 causes disproportionation to separate phases of ZnCO3 and K2CO3. Pure ZnCO3 was synthesized for comparison by a new procedure under atmospheric conditions instead of the more common hydrothermal synthesis of ZnCO3.
- Zhang,Fortier,Dahn
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Read Online
- Crystal structure dependent in vitro antioxidant activity of biocompatible calcium gallate MOFs
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Two novel 3-D coordination polymers, denoted MIL-155 and MIL-156 (MIL stands for Materials Institute Lavoisier), built up from calcium and the naturally occurring gallic acid (H4gal), have been hydrothermally synthesized and their crystal struc
- Hidalgo, Tania,Cooper, Lucy,Gorman, Martin,Lozano-Fernández, Tamara,Simón-Vázquez, Rosana,Mouchaham, Georges,Marrot, Jérome,Guillou, Nathalie,Serre, Christian,Fertey, Pierre,González-Fernández,Devic, Thomas,Horcajada, Patricia
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Read Online
- Characterization of paramagnetic KHo(WO4)2 nanocrystals: Synthesized by polymeric mixed-metal precursor sol-gel method
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Nanocrystalline KHo(WO4)2 (KHW) particles were successfully synthesized via conventional Pechini sol-gel method. Prepared precursor gel was calcined at 250, 550, 600, 650 and 700 °C, and the resulting samples were analyzed with TG-DTA, powder X-ray diffraction, FT-IR, Raman, FESEM, TEM, UV-Vis-NIR (diffuse reflectance spectrum (DRS)), fluorescence and vibrating sample magnetometer (VSM). Thermal degradation of derived gel was observed up to 400 °C and phase formation starts from 550 °C. The product phase formation at higher annealing temperature was investigated by means of powder XRD. Organic liberation in the samples with respect to temperature was analyzed using FT-IR spectrum. Raman spectrum reveals the formation of tungsten ribbons as well as the quality of the samples while increasing the calcination temperature. The nano size of the synthesized particles was confirmed with FESEM and TEM micrographs. Reflectance and emission studies reveal the corresponding absorption and emission properties of trivalent state holmium ion. Paramagnetic behavior of the derived KHW was confirmed with VSM results.
- Thangaraju,Durairajan,Babu, S. Moorthy,Hayakawa
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Read Online
- PROCESS FOR PRODUCING LACTATE
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A process for producing an alkali metal lactate comprising: a) reacting a stream rich in saccharide with barium hydroxide to produce a first reaction mixture comprising barium lactate; and b) contacting at least a portion of said first reaction mixture with an alkali metal hydroxide to produce a second reaction mixture comprising alkali metal lactate and solid barium hydroxide, wherein the alkali metal is selected from the group consisting of sodium, lithium and potassium.
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(2015/11/17)
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- New Complexes of Ruthenium, Method for Their Preparation, and Their Application in Olefin Metathesis Reactions
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The present invention provides new ruthenium complexes of Formula (1), which contain a chelate ring created by a halogen atom X. The invention concerns also a method for the preparation of the new ruthenium complexes and their application in metathesis reactions.
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(2014/06/25)
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- Nickel(i)-mediated transformations of carbon dioxide in closed synthetic cycles: Reductive cleavage and coupling of CO2 generating Ni ICO, NiIICO3 and NiIIC 2O4NiII en
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The β-diketiminato nickel(i) complex K2[L tBuNiI(N22-)NiIL tBu] reacts with CO2via reductive disproportionation to form CO and CO32- containing p
- Horn, Bettina,Limberg, Christian,Herwig, Christian,Braun, Beatrice
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supporting information
p. 10923 - 10925
(2013/11/19)
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- Electrooxidation of ethylene glycol and glycerol on Pd-(Ni-Zn)/C anodes in direct alcohol fuel cells
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The electrooxidation of ethylene glycol (EG) and glycerol (G) has been studied: in alkaline media, in passive as well as active direct ethylene glycol fuel cells (DEGFCs), and in direct glycerol fuel cells (DGFCs) containing Pd-(Ni-Zn)/C as an anode electrocatalyst, that is, Pd nanoparticles supported on a Ni-Zn phase. For comparison, an anode electrocatalyst containing Pd nanoparticles (Pd/C) has been also investigated. The oxidation of EG and G has primarily been investigated in half cells. The results obtained have highlighted the excellent electrocatalytic activity of Pd-(Ni-Zn)/C in terms of peak current density, which is as high as 3300A g(Pd)-1 for EG and 2150A g(Pd)-1 for G. Membrane-electrode assemblies (MEA) have been fabricated using Pd-(Ni-Zn)/C anodes, proprietary Fe-Co/C cathodes, and Tokuyama A-201 anion-exchange membranes. The MEA performance has been evaluated in either passive or active cells fed with aqueous solutions of 5wt % EG and 5wt % G. In view of the peak-power densities obtained in the temperature range from 20 to 80 °C, at Pd loadings as low as 1mg cm -2 at the anode, these results show that Pd-(Ni-Zn)/C can be classified amongst the best performing electrocatalysts ever reported for EG and G oxidation. Copyright
- Marchionni, Andrea,Bevilacqua, Manuela,Bianchini, Claudio,Chen, Yan-Xin,Filippi, Jonathan,Fornasiero, Paolo,Lavacchi, Alessandro,Miller, Hamish,Wang, Lianqin,Vizza, Francesco
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p. 518 - 528
(2013/06/05)
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- Research and development of method for potassium acetate of high purity
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Crystallization of potassium acetate from aqueous solutions, an effect of product yield and washing of its crystals on an efficiency of purification were investigated. Behavior of KCH3COO·1.5H2O was studied in heating. Based on data of the study a technological scheme of producing anhydrous potassium acetate of high purity was developed.
- Fakeev,Murskii,Krasil'Shchik
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p. 1807 - 1813
(2013/07/26)
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- NOVEL CATECHOL DERIVATIVE, PHARMACEUTICAL COMPOSITION CONTAINING THE SAME, USE OF THE CATECHOL DERIVATIVE AND USE OF THE PHARMACEUTICAL COMPOSITION
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The present invention provides compounds represented by general formula (I): or pharmaceutical acceptable salts thereof, wherein R1 and R2 are each hydrogen, lower acyl, lower alkoxycarbonyl or the like; R3 is lower alkyl, halo-lower alkyl, cycloalkyl, heterocycloalkyl, optionally substituted aryl, optionally substituted heteroaryl or the like; R4 is cyano, lower alkoxycarbonyl, carboxy or the like, which exhibit potent COMT inhibitory activities. The present invention also provides pharmaceutical compositions containing said compound, and uses thereof.
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Page/Page column 20
(2011/04/25)
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- ANTIVIRAL ACYLSULFONAMIDE DERIVATIVES
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The present invention discloses compounds of Formula (I), or pharmaceutically acceptable salts, esters, or prodrugs thereof: which inhibit RNA-containing virus, particularly the hepatitis C virus (HCV). Consequently, the compounds of the present invention interfere with the life cycle of the hepatitis C virus and are also useful as antiviral agents. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject suffering from HCV infection. The invention also relates to methods of treating an HCV infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The present invention relates to novel antiviral compounds represented herein above, pharmaceutical compositions comprising such compounds, and methods for the treatment or prophylaxis of viral (particularly HCV) infection in a subject in need of such therapy with said compounds.
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- TEMPLATES FOR NUCLEATION AND PROPAGATION OF PEPTIDE SECONDARY STRUCTURE
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Compounds having the Formula I and pharmaceutically acceptable salts thereof are provided in which the variables are described herein. Methods of making the compounds of Formula I are also disclosed.
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- Isotopic heterogeneity in synthetic and natural silicon carbide
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The distribution of both carbon and silicon isotopes in synthetic sublimation growth SiC wafers and in natural SiC grains was studied using secondary ion mass-spectrometry (SIMS). Significant variations in both isotopic ratios were observed which were broadly correlated with the crystalline perfection as documented by Raman microspectroscopy. Domains consisting of 15R (or with its admixture) are, on average, enriched in 12C isotope relative to 6H domains, and they also show larger scatter in their observed silicon isotope ratios. We ascribe such heterogeneity to fluctuations of Si/C ratio in the growth medium and it is possible to model the spatial extent of such fluctuations. For the natural SiC grains the isotopic data suggest that they grew under relatively stable conditions, although some of them show significant isotopic zoning.
- Shiryaev,Wiedenbeck,Reutsky,Polyakov,Mel'nik,Lebedev,Yakimova
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p. 2492 - 2498
(2009/02/06)
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- NOVEL PROCESS AND FORMULATIONS
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The present invention provides for a novel process of making 6-carboxylic acid derivatives of pyrido[2,3-d]pyrimidin-7-one's, as well as a novel process for making 8-(2,6-difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-{[2-hydroxy-l- (hydroxymethyl)ethyl]-amino}pyrido[2,3-d]pyrimidin-7(8H)-one, and salts thereof.
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Page/Page column 94-95
(2010/11/27)
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- Preparation, characterization and crystal structure of lead(II) tricyanomethanide
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The so far unknown lead tricyanomethanide, Pb[C(CN)3] 2, was obtained from a saturated aqueous solution of PbCl2 and solid AgC(CN)3. Its IR spectrum and thermal behaviour are described. The crystal structure was determined by single-crystal X-ray diffraction (trigonal, P31m, Z = 3, a = 1414.4(5), c = 409.02(6) pm, R 1 = 0.0249, wR2 = 0.0527). Two crystallographically independent ninefold coordinated Pb atoms are connected by planar tricyanomethanide ions in two distinct bridging coordination modes. The Pb-N distances range between 254 and 293 pm.
- Deflon, Victor M.,De Sousa Lopes, Cassia C.,Bessler, Karl E.,Romualdo, Lincoln L.,Niquet, Elke
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- Interaction of graphite with hydroxide-salt melts
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The mechanism and kinetics of graphite dissolution in melts based on sodium hydroxide were studied. The effect of various salt additives on the intensity of the occurring reactions is considered. A method recommended for removal of graphite in the form of remainders of molds and mold cores from titanium casts is described. Pleiades Publishing, Inc., 2006.
- Zarubitskii,Dmitruk,Zakharchenko
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p. 525 - 528
(2008/02/04)
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- Heterogeneous foldamers containing alpha, beta, and/or gamma-amino acids
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Disclosed are isolated, unnatural polypeptides containing cyclically-constrained β-amino acid residues and cyclically-constrained γ-amino acid residues. The compounds are unnatural and because they contain rotationally constrained residues that are not amenable to enzymatic degradation, the compounds are useful to probe protein-protein and other large molecule interactions.
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- Specificity of decomposition of solids in non-isothermal conditions
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The thermal stability of the food additives Na metabisulphite, Na and K acetates, glutamic and citric acids, respective of the pharmaceuticals nifedipine and acetyl salicylic acid was studied by means of the non-isothermal kinetic (Friedman differential m
- Vlase,Vlase,Doca,Doca
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p. 597 - 604
(2008/10/08)
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- HETEROCYCLIC COMPOUNDS THAT ARE INHIBITORS OF THE ENZYME DPP-IV
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The present invention relates to therapeutically active and selective inhibitors of the enzyme DPP-IV of formula I, pharmaceutical compositions comprising the compounds and the use of such compounds for and the manufacture of medicaments for treating diseases that are associated with proteins that are subject to inactivation by DPP-IV, such as type 2 diabetes and obesity.
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- Novel compounds
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Peptide-based gemini compounds comprising basic amino acid chains linked by at least epsilon amide bond, showing improved DNA transfection properties, are disclosed. Methods for production of the compounds and the uses thereof are also disclosed.
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- Heterocyclic analgesic compounds and methods of use thereof
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One aspect of the present invention relates to novel heterocyclic compounds. A second aspect of the present invention relates to the use of the novel heterocyclic compounds as ligands for various cellular receptors, including opiate receptors, other G-protein-coupled receptors, and ion channels. An additional aspect of the present invention relates to the use of the novel heterocyclic compounds as analgesics.
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- The activities of some metal oxides in promoting the thermal decomposition of potassium oxalate
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Transition metal oxalates undergo anion breakdown in the solid state, many between 200 and 400°C, at much lower temperatures than the decomposition of potassium oxalate (at around 600°C) which melts at about 400°C. The present article reports studies of the chemical changes that occurred on heating equimolar crushed mixtures of potassium oxalate with each of a range of (mainly transition metal) oxides, ZnO, PbO, NiO, CuO, Cu2O, Fe2O3, Co3O4 and Cr2O3, in flowing air or hydrogen. The objective was to determine the abilities of these added oxides to promote oxalate ion breakdown. Possible mechanisms of catalysis appeared to include the intervention of the relatively less stable metal oxalates and/or a heterogeneous, catalytic reaction on the surfaces of the oxide or, under reducing conditions, on some of these metals. Melting might also be expected to increase reactivity. The results showed that the activities of these selected oxides in promoting oxalate anion breakdown were unexpectedly small. While these additives resulted in some reaction, there was evidence of the occurrence of some unpromoted decomposition of potassium oxalate during the final stages of heating (about 590-650°C) of all the mixtures studied. Under reducing conditions, in hydrogen, the limited catalytic activities of most oxides were further diminished, evidence that the metal formed was inactive. This contrasts with the autocatalytic reactions, envisaged as proceeding on the surfaces of metal product, in some solid state decompositions, such as nickel oxalate. Potassium oxalate melting was not associated with any increase in reactivity. It is concluded that these oxides do not interact appreciably with the ionic salt and potential oxalate intermediates do not form under these conditions. Surfaces of oxides and of metals similarly do not exhibit catalytic activity for the breakdown of ionic oxalate.
- Mohamed, Mohamed A,Galwey, Andrew K,Halawy, Samih A
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- Use of (+)-a-(2,3-dimethoxyphenyl)-1-[2-(4-fluorophenyl) ethyl]-4-piperidinemethanol or its prodrug in the treatment of symptoms of dementia and dopamine induced psychosis
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The present invention is directed to use of (+)-α-(2,3-Dimethoxyphenyl)-1-[2-(4-fluorophenyl)ethyl]-4-piperidinemethanol or its prodrug (Formula II) in treating patients for symptoms of dementia and dopamine induced psychosis.
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- Cyclic AMP-specific phosphodiesterase inhibitors
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Novel pyrrolidine compounds that are potent and selective inhibitors of PDE4, as well as methods of making the same, are disclosed. Use of the compounds in the treatment of inflammatory diseases and other diseases involving elevated levels of cytokines, as well as central nervous system (CNS) disorders, also is disclosed.
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- USE OF R-(+)-alpha-(2,3-DIMETHOXYPHENYL-1-[2-(4-FLUOROPHENYL) ETHYLl-4-PIPERIDINEMETHANOL FOR THE TREATMENT OF SLEEP DISORDERS
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A method of treating a patient for a Sleep Disorder comprising administering an effective amount of R-(+)-α-(2,3-Dimethoxyphenyl)-1-[2-(4-fluorophenyl)ethyl]-4-piperidinemethanol or a pharmaceutically acceptable salt thereof to a patient in need of such treatment.
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- META-GUANIDINE, UREA, THIOUREA OR AZACYCLIC AMINO BENZOIC ACID DERIVATIVES AS INTEGRIN ANTAGONISTS
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The present invention relates to a class of compounds represented by the Formula Ior a pharmaceutically acceptable salt thereof, whereinA ispharmaceutical compositions thereof and methods of using such compounds and compositions as alphavbeta3 antagonists.
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- Intercalation of anionic oxalato complexes into layered double hydroxides
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Intercalation compounds of layered double hydroxide (LDH), M(1-x)/(II)M(x)/(III)(OH)2A(x/y) · nH2O (with M(II)=Zn, Cu and M(III)=Al, Cr, Ga), with oxalato complexes of aluminium, gallium, chromium, copper, and beryllium, were obtaine
- Prevot,Forano,Besse
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p. 301 - 309
(2008/10/08)
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- X-ray, thermal and infrared spectroscopic studies on potassium, rubidium and caesium uranyl oxalate hydrates
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M2UO2(C2O4)2·nH2O compounds (M = K, Rb and Cs) have been prepared and characterized by chemical and thermal analyses as well as by X-ray diffraction and infrared spectroscopy. X-ray powder
- Dahale,Chawla,Venugopal
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p. 107 - 117
(2008/10/08)
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- Simultaneous differential scanning calorimetry and reflected light intensity (DSC-RLI) in the study of inorganic materials
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This paper re-examines work on inorganic materials and oxalates, but combines differential scanning calorimetry (DSC) measurements with simultaneous observation and recording of the reflected light intensity to obtain more detailed information about the p
- J. Haines, Peter
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p. 285 - 292
(2008/10/09)
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- Preparation of alkali-metal dideuterium phosphates
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Methods for the preparation of deuterated orthophosphoric acid and alkali-metal dideuterium phosphates are discussed. The easiest and cheapest way of producing these compounds is via the hydration of massive P2O5 polycrystals obtained by vacuum distillation.
- Lokshin
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p. 720 - 722
(2008/10/08)
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- Synthesis, characterization and the thermal decomposition of potassium tris(oxalato)lanthanum(III)nonahydrate
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Potassium tris(oxalato)lanthanum(III)nonahydrate, K3[La(III)(C2O4)3]·9H 2O, has been synthesized and characterized by elemental analysis and IR spectral studies. Thermal studies (TG, DTG and DTA) in air showed that the anhydrous compound formed at ca. 192°C. The final end product at 1000°C was shown to be a mixture of La2O3, K2CO3, K2O, KLaO2 and La2C3, through the formation of an intermediate mixture of K2C2O4 and K[La(C2O4)x] (where 1.5 2C2O4 and La2O2CO3 at ca. 528°C. DSC study in nitrogen upto 650°C showed that the end product was a mixture of K2C2O4 and La2O2CO3. The kinetic parameters, mainly E* of the dehydration and decomposition steps in TG, were calculated using four non-mechanistic equations. The kinetic parameters, E*, ΔH, ΔS obtained from DSC study are discussed. Some of the decomposition products were identified by IR and X-ray powder diffraction studies. A tentative mechanism for the decomposition in air is proposed.
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- Thermal analysis of oxamates, thiooxamates and their complexes: Part 2. The Cu (II) complexes
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The article describes the thermal behaviour of Cu(II) complexes formed with ligands R1R2NCXCOOK (R1R2=H or CH3, X=O or S). The oxamates form 2/1 complexes Cu(R1R2NCOCOO)2/s
- Keuleers,Janssens,Desseyn
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p. 155 - 162
(2008/10/09)
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- N-(carbonyl, carbonimidoyl, carbonothioyl)sulfonamide charge control agents and toners and developers
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An electrophotographic toner having polymeric binder and a charge control agent selected from the group consisting of sulfonamides having the general structure: STR1 and metal salts thereof. T1 is independently selected from H, alkyl having from 1 to 20 carbons, cycloalkyl having from 3 to 18 carbons, and aromatic and heteroaromatic ring systems having a solitary ring or 2 to 3 linked or fused rings. R1 is O, S, N--H, N--R5, or N--L--R5 ; where L is a linking group selected from: STR2 and R5 is independently selected from alkyl having from 1 to 20 carbons, cycloalkyl having from 3 to 18 carbons, and aromatic and heteroaromatic ring systems having a solitary ring or 2 to 3 linked or fused rings. L1 and L2 are each independently a direct link or divalent alkyl or fluoroalkyl having from 1 to 20 carbons. Ra and Rb are each independently selected from the group consisting of H, F and ring systems having a solitary ring or from 2 to 3 fused or linked rings, said ring system having from 3 to 34 carbons, including carbons of substituent groups. If L1 is a direct link, Ra is a ring system and if L2 is a direct link, Rb is a ring system.
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- Bis and tris N-(carbonyl, carbonimidoyl, carbonothioyl) sulfonamide charge control agents, toners and developers
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An electrophotographic toner having polymeric binder and a charge control agent selected from the group consisting of sulfonamides having the general structure: STR1 Each R1 is independently O, S, N-H, N-Rz, or N-L-Rz ; where L is a linking group selected from: STR2 and Rz is independently selected from the group consisting of alkyl having from 1 to 20 carbons, cycloalkyl having from 3 to 18 carbons, and aromatic and heteroaromatic ring systems having a solitary ring or 2 to 3 linked or fused rings. Ra, Rb, and Rc are each independently a ring system of a single ring or 2 or 3 fused or linked rings, said ring system having from 3 to 34 carbons, including substituent carbons. d is an integer from 0 to 3. e is an integer from 0 to 3. The sum of d+e is 2 or 3.
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- Teranry Oxides containing Anionic Gold
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The preparation and crystal structure of the novel ternary oxides M3AuO (M=Cs, Rb, K) containting anionic gold is reported. Cs3AuO (a=7.830(1) A, c=7.060(1) A) crystallizes as an hexagonal, Rb3AuO (a=5.501(1) A), K3AuO (a=5.240(1) A) as a cubic anti perovskite. Concerning to the ionic description (M(1+))3Au(1-)O(2-) in Cs3AuO gold exists as an anion. In Rb3AuO and K3AuO the anionic character of gold decreases respectively. The analysis of bond length and molar volumes gives support to this view, as well as investigations of conductivity and magnetic properties do.
- Feldmann, Claus,Jansen, Martin
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- Studies on the thermal decomposition of dipotassium trans-diaquabis(oxalato-O,O')nickelate(II) tetrahydrate
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The thermal behaviour of the compound K2[Ni(C2O4)2(H2O)2] . 4H2O has been studied by thermogravimetry and differential thermal analysis. Experiments were carried out in dynamic atmospheres of argon-oxygen and argon, respectively, over the temperature rang
- Roman, Pascual,Guzman-Miralles, Carmen,Luque, Antonio,Seco, Maria Luisa
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- Method of treatment of inflamed tissues
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A method of and composition for concentrating a therapeutic agent in an inflamed dermal region are disclosed. The composition, which is also used in the method, is a liposomal composition. The liposomes contain the therapeutic agent in entrapped form and are composed of vesicle-forming lipids including a vesicle-forming lipid derivatized with hydrophilic biocompatible polymer. After intravenous administration, the liposomes are taken up by the inflamed region within 24-48 hours, for site-specific release of entrapped compound into the inflamed region.
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- Preparation of 4-(6'-methoxy-2'-naphthyl)-3-buten-2-one
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An intermediate for the manufacture of nabumetone, 4-(6'-methoxy-2'-naphthyl)-3-buten-2-one, is prepared by contacting 2-bromo-6-methoxynaphphalene with methyl vinyl ketone in the presence of a palladium catalyst at from about 50° C. to about 200° C. for a time sufficient to cause substantially complete reaction to occur.
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- Thermal decomposition of the [Co(NH3)6]Cl3, Co[(NH3)4Cl2]Cl, K3[Fe(C2O4)3] 3H2O and Fe(CH3COO)3 in argon and air
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Kinetic parameters (apparent activation energy, reaction order, pre-exponential factor (Z) in the Arrhenius equation) for thermal decomposition of the [Co(NH3)6]Cl3, Co[(NH3)4Cl2]Cl, K
- Wojciechowska,Bragiel,Czerwinski
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p. 1295 - 1306
(2008/10/08)
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- Thermoanalytical investigations on the decomposition of transition metal oxalate complexes using selective CO, CO2 and H2O monitors
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Simultaneous TG, DTG, DTA measurements along with the continuous and selective monitoring of carbon monoxide, carbon dioxide and water evolved were carried out on K3[M(C2O4)3].3H2O-type transition met
- Horvath,Kristof
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p. 1471 - 1480
(2008/10/08)
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- Cephalosporin compounds and their use
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A cephalosporin compound of the formula (I): wherein X and Y may be the same or different and are a hydrogen or halogen atom; Z is a hydrogen or halogen atom, -CH=CH2, -CH=CH-CH3, -OR1, -SR2 or -CH2W in which R1 and R2 are a lower alkyl group and W is a hydrogen atom or a nucleophilic residue, its pharmaceutically acceptable salt, a process for preparing the same and their antibacterial composition.
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- Chromium(III) complexes of amino acids with anion of glutathione or nicotinic acid as a co-ligand
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The mixed ligand complexes 2 and K have been synthesised and characterized.A facial octahedral geometry is suggested for the complexes on the basis on electronic spectral studies.IR spectral studies indicate that bonding with chromium atom occurs through the amino and carboxylate groups of the amino acids, bridging carboxylate group of Hnic, and amino, thiol and amide groups of glutn.Results of the thermal decomposition studies are also discussed.
- Shanthi, R.,Nagaraja, K. S.,Udupa, M. R.
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p. 189 - 191
(2007/10/02)
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- Solid state reaction between dichromates and oxalates
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The thermal investigation of the reaction taking place between dichromates and oxalates in the solid state has been done taking two systems of potassium dichromate-potassium oxalate and sodium dichromate-sodium by oxalate. The techniques employed include thermogravimetry, differential thermal analysis, infrared spectroscopy and X-ray diffraction studies. The results indicate a stoichiometric reaction of dichromate and oxalate in 1:1 ratio to give the corresponding chromate as the sole product.
- Suba,Udupa
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p. 1197 - 1203
(2008/10/08)
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- Nor-statine and nor-cyclostatine polypeptides
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Polypeptides and derivatives thereof containing nor-statine and nor-cyclostatine are useful for inhibiting the angiotensinogen-cleaving action of the enzyme renin.
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- Reductive Disproportionation of Carbon Dioxide by Dianionic Carbonylmetalates of the Transition Metals
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Carbon dioxide reacts readily with M2 (M=Li, Na, K, M'=W; M=K, M'=Cr, Mo, W) to give the corresponding group 6 hexacarbonyls and alkali metal carbonates.The reaction of Li2 with excess 13CO2 at -78 deg C gives , con
- Lee, Gary R.,Maher, John M.,Cooper, N. John
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p. 2956 - 2962
(2007/10/02)
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- MOSSBAUER STUDY OF THE THERMAL DECOMPOSITION OF ALKALI TRIS(OXALATO)FERRATES(III).
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The thermal decomposition of alkali (Li,Na,K,Cs,NH//4) tris(oxalato)ferrates(III) has been studied at different temperatures up to 700 degree C using Mossbauer, infrared spectroscopy, and thermogravimetric techniques. The formation of different intermedia
- Brar,Randhawa
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p. 153 - 156
(2008/10/08)
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- High-Pressure Reactions of Oxometallates - 3. High-Pressure, High-Temperature Decomposition of KVO3.
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The high-pressure, high-temperature behavior of KVO//3 was investigated in a modified belt-type apparatus at different pressures (3-40 kbar), temperatures (500-1100 degree C), using reducing (BN, graphite) or inert (Cu, Ag, Au) capsule materials. Hollandites K//2// minus //xV//8O//1//6, modified Hollandites K//2// minus //xV//8// plus //2//xO//1//6// plus //x, and V//2O//3 were synthesized as quenchable, crystalline materials. A sequence of reactions is proposed for the high-pressure decomposition of KVO//3 in inert capsules which involves the formation of potassium peroxoanadates.
- Range,Abriel
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