Chemicals & Chemistry back issues from April 2009:
Data on science published by researchers at University of Valencia.
Apr 03, 2009 ... According to recent research from Spain, "The derivative of the voltabsommetric scans, together with previous nano-electrogravimetric and X-ray diffraction results, allow different electrochemical processes to be distinguished during the Prussian blue (PB) voltammetric scan." ...
Study data from G.G. Lee and colleagues update understanding of science.
Apr 03, 2009 ... According to recent research published in the journal Materials Transactions, "In the present study, the focus is on the synthesis of ultra fine titanium-tungsten carbide powder by the carbothermal reduction process. The starting powder was prepared by the combination of drying and ...
Studies from Sun Yat-Sen University yield new data on science.
Apr 03, 2009 ... According to recent research published in the Journal of the Electrochemical Society, "Both zinc oxide rods and zinc hydroxide slice were grown on gallium arsenide in the aqueous solution of zinc nitrate and hexamethylenetetramine. Incorporating with an appropriate concentration of nitric ...
New catalysis research research from J.R. Zoeller et al outlined.
Apr 03, 2009 ... According to a study from the United States, "Eastman Chemical Company first initiated its Chemicals from Coal program in the mid-1970S." "The program led to the successful commercialization of a process to produce acetic anhydride entirely from coal-based synthesis gas in ...
Research conducted at University of Maryland has provided new information about analytical chemistry.
Apr 03, 2009 ... "We use finite-difference time-domain calculations to show that aluminum nanoparticles are efficient substrates for metal-enhanced fluorescence (MEF) in the ultraviolet (UV) for the label-free detection of biomolecules," researchers in the United States report. "The radiated ...
Study results from S.G.C. Matta et al provide new insights into animal reproduction.
Apr 03, 2009 ... "The aim of the present study was to investigate the effects of inhibition of the enzyme inducible nitric oxide synthase (iNOS) by aminoguanidine (AG) on the in vitro maturation of oocyte-cumulus cell complex(es) (COC) of cattle. COC were cultured with different concentrations of AG (0, 1, ...
Study data from Y. Qian et al provide new insights into planetary science.(Report)
Apr 03, 2009 ... "Radiative forcing induced by soot on snow is an important anthropogenic forcing affecting the global climate. In this study we simulated the deposition of soot aerosol on snow and the resulting impact on snowpack and the hydrological cycle in the western United States," scientists in the ...
New data from Doshisha University illuminate research in separation science.
Apr 03, 2009 ... "We developed a microchip CE method with chemiluminescence (CL) detection using the reaction of 1,10-phenanthroline and hydrogen peroxide for separation and determination of metal ions, where the metal ions acted as catalysts for the CL reaction. The microchip consisted of two ...
Studies by S.N. Sharma and co-authors describe new findings in science.
Apr 03, 2009 ... "In the present investigation, 15 Andrographis paniculata genotypes collected from Chhattisgarh and adjoining states were grown in the field for the variability studies. Three different variability parameters namely morphological, molecular and chemotyping of active ingredient content were ...
Recent findings in macromolecular research described by Y. Nagao and colleagues.
Apr 03, 2009 ... According to a study from Nagoya, Japan, "A ''click'' polymerization of dialkynes that contain an ester linkages and diazides to has been performed to synthesize various polyesters, termed ''click polyesters'' with a high (M) over bar (n) of 1.0 x 10(4) to 7.0 x 10(4) in an excellent ...
Research from University of Belgrade in the area of solid state chemistry published.
Apr 03, 2009 ... According to recent research published in the Journal of Solid State Electrochemistry, "Electrochemically deposited Zn-Co alloys under various deposition conditions were investigated using anodic linear sweep voltammetry for phase structure determination, scanning electron microscopy for ...
Study findings from University of Idaho broaden understanding of plant nutrition.
Apr 03, 2009 ... According to recent research published in the Journal of Plant Nutrition, "Incorporating deep litter cow and deep litter poultry manures with the top 30-cm soil improved orchard soil chemistry, including nutrient availability, soil organic matter, electrical conductivity (EC), pH, cation ...
New molecular research study findings recently were reported by researchers at University of Antofagasta.
Apr 03, 2009 ... "A theoretical study was carried out on the adsorption of carbon monoxide on small bimetallic LimCun (m,n <= 4) clusters and it was compared with the adsorption of CO on copper (Cu-n, n<= 8) clusters using density functional methods," scientists in Antofagasta, Chile report. ...
Data from University of Exeter provide new insights into vegetation science.
Apr 03, 2009 ... "Can cation analyses of water samples within a peatland site be used to infer solute sources to the samples, and so provide an objective criterion of ombrotrophy? Mire complexes within native Pinus sylvestris forest, in Abernethy Forest, north of the Cairngorm Mountains, Scotland, UK ....
Studies from B. Malvi and colleagues provide new data on materials chemistry.
Apr 03, 2009 ... "SBA-15 mesoporous silica has been functionalized with azidopropyl groups through both one-pot co-condensation and post-synthetic grafting. For both these methodologies, azidopropyltriethoxysilane was used to introduce the azidopropyl groups," researchers in Pune, India report. ...
New chemistry data have been reported by scientists at Cornell University.
Apr 03, 2009 ... According to a study from the United States, "The bonding of a rare S-4(2-) rectangle coordinated to four transition metals (synthesized by Isobe, Nishioka, and co-workers), [{M-2(eta(5)-C5Me5)(2)(mu-CH2)(2)}(2)(mu-S-4)](2+) (M=Rh, Ir) is analyzed. DFT calculations indicate that, while ...
Study findings from University of Zurich provide new insights into physical chemistry.
Apr 03, 2009 ... "DNA photolyase is a highly efficient light-driven enzyme that repairs the UV-induced cyclobutane pyrimidine dimer in damaged DNA. Herein, we investigate the repair reaction of the thymine dimer by means of hybrid quantum mechanical/molecular mechanical QM/MM) dynamics simulations based on ...
Findings from University of Cologne in theoretical chemistry reported.(Report)
Apr 03, 2009 ... According to a study from Cologne, Germany, "This article reports on the calulation of 12 low lying states of the nitrogen molecule along its dissociation using the multi-reference exponential wavefunction ansatz (Hanrath in J Chem Phys 123:84102, 2005), the single-reference formalism ...
Reports summarize microchemical research from Sichuan University.
Apr 03, 2009 ... According to a study from Chengdu, People's Republic of China, "A new luminol derivative has been synthesized and its fluorescence has been studied. The luminol derivative emits at 460 nm in pH 10.0 phosphate buffer which is different from the original luminol that emits at 425 nm under ...
New findings from Columbia University describe advances in electrochemical research.
Apr 03, 2009 ... According to recent research from the United States, "Three copper-plating suppressors are examined in three-additive baths: a polyethylene glycol (PEG), a polypropylene glycol (PPG), and a triblock copolymer of the two. Bis(3-sulfopropyl)-disulfide (SPS) is found to transition each to a ...
Investigators at University of York zero in on biogeochemistry.
Apr 03, 2009 ... According to recent research published in the journal Biogeochemistry, "In N-polluted, minimally managed soils, recent research has shown that ammonium-N, as well as nitrate-N, may move down through soil profiles. There is a need, therefore, to reassess what controls N species ...
Research conducted at B. Tian and co-authors has provided new information about applied electrochemistry.
Apr 03, 2009 ... According to recent research from Shenyang, People's Republic of China, "Surface films of TiN and TiN/Ti were deposited on Ti6Al4V alloy by arc ion plating (AIP). Open-circuit potential, potentiodynamic polarization tests and electrochemical impedance spectroscopy (EIS) were employed to ...
Researchers from Hunan University describe findings in metal chemistry.
Apr 03, 2009 ... According to a study from Xiangtan, People's Republic of China, "Chiral bridge-substituted manganese(III) complexes of N,N'-bis-(2-hydroxynaphthalene-1-carbaldehyde)-(1R,2R)-(-)-diaminocyclohexane and N,N'-bis-(2-hydroxynaphthalene-1-carbaldehyde)-(1S,2S)-(+)-diaminocyclohexane have been ...
Data on plasma chemistry published by researchers at University of Ghent.
Apr 03, 2009 ... According to recent research from Ghent, Belgium, "The present work describes the plasma polymerisation of acrylic acid at atmospheric pressure. The influence of two operating parameters (monomer concentration and discharge power) on the properties of the deposited films is investigated." ...
Studies conducted at Nagoya University on chemical reactor engineering recently published.
Apr 03, 2009 ... "We study a hybrid adsorption heat pump water heater for domestic use that comprises a water heater with dual heat sources," investigators in Nagoya, Japan report. "This water heater combines the advantages of an adsorption heat pump and a conventional gas boiler. An ...
Studies from E.E. Shults et al add new findings in the area of organic chemistry.
Apr 03, 2009 ... According to a study from Russia, "Retro-Diels-Alder decomposition of dodecahydro-endo-4b,12-ethenochrysene-1,4-diones obtained from a tricyclic diterpenoid, levopimaric acid, gave optically active 5-[2-(6-vinyl-2,6-dimethyl-2-carboxycyclohexyl) ethyl]-7-isopropyl-1,4-naphthoquinones which ...
Data on chemical research reported by researchers at Seoul National University.
Apr 03, 2009 ... "Electron attachment to the van der Waals complexes of azabenzene-(CO2). results in the formation of covalent bonds between the nitrogen atoms of azabenzene and the carbon atom of CO2," scientists in Seoul, South Korea report. "The newly formed C-N bonds establish an extended ...
New biochemistry data have been reported by scientists at Duke University.
Apr 03, 2009 ... According to a study from the United States, "Nitrosative stress is induced by pathophysiological levels of nitric oxide (NO) and S-nitrosothiols (e.g., S-nitrosoglutathione, GSNO) and arises, at least in significant part, from the nitrosylation of critical protein Cys thiols ...
New biological chemistry research from T.D. Nightingale et al outlined.
Apr 03, 2009 ... According to recent research from Oxford, the United Kingdom, "The major lymphatic endothelial hyaluronan receptor LYVE-1, a Link superfamily glycoprotein similar to the hyaluronan-binding/inflammatory leukocyte homing receptor CD44, was initially implicated in hyaluronan (HA)-mediated ...
New findings from D.A. Geier and co-researchers in the area of neurochemistry described.(Report)
Apr 03, 2009 ... According to recent research from the United States, "The goal of this study was to evaluate transsulfuration metabolites in participants diagnosed with autism spectrum disorders (ASDs). Transsulfuration metabolites, including: plasma reduced glutathione (GSH), plasma oxidized glutathione ...
Studies from H.L. Chen and colleagues provide new data on computational biology.
Apr 03, 2009 ... According to recent research from Wuhan, People's Republic of China, "Accurate identifications of internal symmetric substructures of proteins are needed in protein evolution study and protein design." "To overcome the difficulties met by previous methods, here we propose a ...
Data from O.V. Nazarova and colleagues advance knowledge in carbohydrate chemistry.
Apr 03, 2009 ... According to a study from Russia, "New polyvinylsaccharides containing primary or tertiary amino groups were synthesized by radical copolymerization of 2-deoxy-2-methacrylamido-D-glucose (MAG) with 2-(dimethylamino)ethyl methacrylate, 2-(diethylamino)ethyl methacrylate (DEAEM), or ...
Study results from Aarhus University in the area of biomolecular chemistry published.
Apr 03, 2009 ... "A series of alpha-cyclodextrin derivatives containing a 3, 4 or 5 membered ether-linked bridge between the 6A and 6D oxygen atoms, with and without a ketone, were prepared. The synthesis used perbenzylated a-cyclodextrin A, D-diol as a starting material upon which O-alkylation and further ...
Studies from University of California add new findings in the area of biochemistry & cell biology.
Apr 03, 2009 ... "Fibronectin and tenascin are extracellular matrix glycoproteins that play important roles in cell adhesion and motility. In a previous study we provided evidence that tenascin first appeared early in the chordate lineage," scientists in the United States report. "As tenascin ...
Researchers from University of Sao Paulo publish new studies and findings in the area of analytical biochemistry.
Apr 03, 2009 ... "The giant extracellular hemoglobin of Glossoscolex paulistus (HbGp) is constituted by Subunits containing heme groups with molecular masses (M) in the range of 15 to 19 kDa, monomers of 16 kDa (d), and trimers of 51 to 52 kDa (abc) linked by nonheme structures named linkers of 24 to 32 ...
Research reports on medicinal chemistry from Kaohsiung Medical University provide new insights.
Apr 03, 2009 ... "A series of omega-aminoalkoxylxanthones was synthesized and tested in vitro for their ability to inhibit platelet aggregation and cause vasorelaxing action," investigators in Kaohsiung, Taiwan report. "Compounds 4, 5, 12, 17, and 18 showed significant antiplatelet effects on ...
New chemical research study findings have been reported from University of California.
Apr 03, 2009 ... According to recent research published in the Journal of the American Chemical Society, "A pyrene-modified beta-cyclodextrin (pyrenecyctodextrin)-decorated single-walled carbon nanotube (SWNT) field-effect transistor (FET) device was fabricated, which can serve as a tunable photosensor to ...
Scientists at Beijing Normal University discuss research in theoretical chemistry.
Apr 03, 2009 ... According to a study from Beijing, People's Republic of China, "We present the theoretical evaluation of new AMBER force field parameters for 12 copper-based nucleases with bis(2-pyridylmethyl) amine, 2,2'-dipyridylamine, imidazole, N,N-bis(2-benzimidazolylmethyl) amine and their ...
Momentive Opens Fifth Global Polyurethane Additives Laboratory.(Company overview)
Apr 03, 2009 ... Momentive Performance Materials announced that it will open an R&D and technical service laboratory for Urethane Additives (oUAo) in Leverkusen, Germany. Supporting MomentiveEs global presence in this vital industry, Momentive also operates UA R&D laboratories in Sisterville, WV and ...
Dayton Superior Amends Credit Agreement.
Apr 03, 2009 ... Dayton Superior Corporation (NASDAQ: DSUP), the leading North American provider of specialized products for the nonresidential concrete construction market, announced that it has entered into a first amendment to the revolving credit agreement with the lender under its $150.0 million ...
Study results from A. Mfopara et al provide new insights into plasma chemistry.
Apr 03, 2009 ... "Oxidation of dilute methane in oxygen containing mixtures by atmospheric pressure dielectric barrier discharge at moderate temperature (below 150A degrees C) has been studied with regard to the effect of water vapor. First, the impact of water vapor on methane conversion was studied in ...
New chemical research study findings have been reported by researchers at Queen's University.
Apr 03, 2009 ... According to recent research from Kingston, Canada, "The cleavage of a series of seven substituted aryl 2-hydroxypropyl phosphates (1a-g) promoted by a dinuclear Zn(II) complex (3:Zn(II)(2):(-OCH2CH3)) was investigated in ethanol at (s)(s) pH 9.0 +/- 0.2 and 25 degrees C. The kinetics for ...
Arizona State University publishes research in analytical chemistry.
Apr 03, 2009 ... According to recent research from the United States, "A microfluidic method to rapidly measure the octanol-water partition coefficient in thousands of individual picoliter drops is described. AT-junction microfluidic chip is used to generate a segmented flow of monodisperse, ...
New findings from G. Teravetisyan and co-authors in the area of biological chemistry published.
Apr 03, 2009 ... According to recent research published in the Journal of Biological Chemistry, "Arginine-rich peptides are a subclass of cell-penetrating peptides that are taken up by living cells and can be detected freely diffusing inside the cytoplasm and nucleoplasm. This phenomenon has been ...
Research from R.J.C. Brown and co-researchers yields new findings on microchemical research.
Apr 03, 2009 ... According to a study from Teddington, the United Kingdom, "Stripping voltammetry analysis using a hemispheroidal mercury microelectrode has been previously assessed theoretically as a possible candidate 'primary method' for amount of substance measurement." "It was shown that ...
Data from Indiana University provide new insights into analytical chemistry.
Apr 03, 2009 ... According to recent research published in the journal Analytical Chemistry, "We report serial-to-parallel interfaces for rapidly and efficiently transferring samples from a single microfluidic channel to multiple parallel channels. Three designs and operation modes were evaluated to ...
Research from S. Jang and co-researchers in the area of biological chemistry published.(Report)
Apr 03, 2009 ... "Collectin placenta 1 (CL-P1), a recently discovered scavenger receptor, mediates the uptake of oxidized low density lipoprotein and microbes. In this study, we investigated CL-P1-mediated binding and ingestion of yeast-derived zymosan bioparticles using Chinese hamster ovary (CHO) cells ...
Studies from University of Lisbon in the area of chemical research published.
Apr 03, 2009 ... According to recent research from Lisbon, Portugal, "The effect of the environment on the properties of water in the bulk and at the surface of a cluster is studied by all-electron Born Oppenheimer molecular dynamics. The vibrational spectrum of surface and bulk water is interpreted in ...
Reports outline chemical research from University of Pennsylvania.
Apr 03, 2009 ... "A structure designed to show functionality on the nanometer length scale ideally would spontaneously form periodic nanometer-scale patterns comprising regions with contrasting properties," investigators in the United States report. "Here we report the synthesis of three new ...
Research on electrochemical research detailed by scientists at Technical University of Denmark.
Apr 03, 2009 ... "The thermodynamic properties as well as oxygen exchange kinetics were examined on mixed ionic and electronic conducting (La0.6Sr0.4)(0.99)FeO3(-delta) (LSF64) thin films deposited on MgO single crystals. It is found that thin films and bulk material have the same oxygen stoichiometry for ...
Findings from University of Turin provide new insights into chemistry.
Apr 03, 2009 ... "The heptadentate ligand 1,4-bis(hydroxycarbonylmethyl)-6-[bis(hydroxycarbonylmethyl)]amino-6-methylperhydro-1,4-diazepine (AAZTA) and its derivatives were recently reported to give stable complexes with Gd3+ with superior efficiency as MRI contrast agents. Nevertheless, only preliminary ...
Reports from Princeton University add new data to research in chemical research.
Apr 03, 2009 ... "The first enantioselective organocatalytic carbo-oxidation of styrenes has been accomplished using singly occupied molecular orbital (SOMO) catalysis. Geometrically constrained radical cations are generated from the one-electron oxidation of enamines formed from the condensation of ...
New microchemical research from Technical University of Ilmenau described.
Apr 03, 2009 ... According to a study from Ilmenau, Germany, "Polymer microparticles containing an immobilized pH-sensitive dye are used for determination of pH inside microfluidic segments. The particles possess a hydrophilic surface in order to get a homogenous distribution inside the aqueous phase of ...
Research from J.W. Bennett and colleagues has provided new data on chemical research.
Apr 03, 2009 ... "We use first-principles density functional theory (DFT) calculations to investigate the ground-state structures of PbTiO3 solid solutions containing Ni, Pd, and Pt," scientists in the United States report. "Anomalous effective charges are reported, including the first report ...
New organic chemistry study findings have been reported from S. Dekeukeleire et al.
Apr 03, 2009 ... 'cis-4-(1-Chloro-1-methylethyl)-1-(omega-hydroxyalkyl)azetidin-2-ones were diastereoselectively transformed into novel trans-1-aza-4-oxabicyclo[3.3.0]octan-8-ones and trans-1-aza-5-oxabicyclo[4.3.0]nonan-9-ones upon treatment with 1 equiv of AgBF4 and pyridine in toluene via intramolecular ...
Studies from Kyushu University describe new findings in chemical research.
Apr 03, 2009 ... According to a study from Fukuoka, Japan, "Hydration of tetrolic acid ethyl ester as an alkyne-carboxylic acid ester catalyzed by an Ir-aqua complex [(IrCp)-Cp-III*(bpy)(OH2)](2+) (1, Cp* = eta(5)-C5Me5, bpy = 2,2'-bipyridine) in water provides ethyl acetoacetate as a beta-keto, acid ...
Waseda University publishes research in electrochemical research.(Report)
Apr 03, 2009 ... "For completion of on-chip field effect transistor (FET) biosensors, it is essential to produce a reference FET instead of a reference electrode that uses an inner electrolyte. In this study, a light-addressable potentiometric sensor (LAPS) modified by a self-assembled monolayer (SAM) of ...
New chemical research study findings have been published by scientists at Columbia University.
Apr 03, 2009 ... "The ''aglycone'' of pluraflavin A (2) has been synthesized," investigators in the United States report. "The key features of this synthesis include a 1,3-dipolar cycloaddition between a nitrile oxide (cf. 14) and an olefin (22) to yield an isoxazoline followed by subsequent ...
Research findings from University of California update understanding of chemical research.
Apr 03, 2009 ... According to a study from the United States, "A new low band gap silole-containing conjugated polymer, PSBTBT, was designed and synthesized." "Photovoltaic properties of PSBTBT were initially investigated, and an average power conversion efficiency (PCE) of 4.7 % with a best ...
New chemistry study findings recently were reported by researchers at Mahidol University.
Apr 03, 2009 ... According to recent research from Bangkok, Thailand, "A new series of xanthone derivatives against the oral human epidermoid carcinoma (KB) cancer cell line is examined to determine the relationship between the structural properties and the biological activity of these compounds-the 3-D ...
Researchers at Xiamen University publish new data on chemistry.
Apr 03, 2009 ... "The first total synthesis of melleumin A and four analogues of melleumins A and B is described," investigators in Xiamen, People's Republic of China report. "The N-acyl L-Thr-Gly/beta-hydroxy-gamma-amino acid coupling/macrolactarnization strategy allowed the efficient assembly ...
Studies from Graz University further understanding of chemical research.
Apr 03, 2009 ... According to recent research published in the Journal of the American Chemical Society, "Reactions of trisilylated silylfluorides with potassium tert-butoxide were found to give disilylated fluorosilylenoids. The latter undergo a self-condensation reaction, leading to the formation of ...
New chemical research study results reported from University of California.
Apr 03, 2009 ... "Conformational dynamics are thought to play an important role in ligand binding and catalysis by cytochrome P450 enzymes, but few techniques exist to examine them in molecular detail. Using a unique isotopic labeling strategy, we have site specifically inserted a C-13-labeled unnatural ...
Reports summarize chemical research study results from Princeton University.
Apr 03, 2009 ... According to a study from the United States, "We report on the first detailed atomic-scale studies of micelle fission in micellar systems consisting of anionic sodium dodecyl sulfate with explicit solvent." "We demonstrate a new micelle fission pathway for ionic surfactants and ...
Studies from University of Ottawa reveal new findings on chemical research.
Apr 03, 2009 ... "Several simple mono- and disaccharides have been assessed for their ability to inhibit ice recrystallization. Two carbohydrates were found to be effective recrystallization inhibitors," scientists in Ottawa, Canada report. "D-Galactose (1) was the best monosaccharide and ...