Chemicals & Chemistry back issues from September 2008:
Research on science detailed by R. Azmat and co-authors.
Sep 05, 2008 ... According to a study from Karachi, Pakistan, "Aluminium (Al) bioavailability has raised much interest in the last two decades because of its acute toxicity, particularly at high dose, which results in the morphological and physiological disorder. Lens culinaris was selected to study the ...
Studies from Kyoto Pharmaceutical University describe new findings in applied chemistry.
Sep 05, 2008 ... "Cyclodextrins (CDs) attract much attention for industrial applications and academic research. A few experimental methods for determination of the binding constant between CD and a guest molecule were reviewed critically," scientists writing in the journal Pure and Applied Chemistry ...
Researchers from North Carolina State University report details of new studies and findings in the area of horticultural science.
Sep 05, 2008 ... According to recent research from the United States, "Stokes aster [Stokesia laevis (J. Hill) Greene] is a herbaceous perennial endemic to the coastal plains of the southeastern United States." "Anthocyanin and copigment aglycones from flowers were characterized using ...
Reports from R.T. Garrod and co-researchers add new data to research in astronomy.
Sep 05, 2008 ... "Gas-phase processes were long thought to be the key formation mechanisms for complex organic molecules in starforming regions. However, recent experimental and theoretical evidence has cast doubt on the efficiency of such processes," investigators in Bonn, Germany report. ...
New geology data have been reported by I.M.H.R. Antunes and co-authors.
Sep 05, 2008 ... "The zoned pluton from Castelo Branco consists of Variscan peraluminous S-type granitic rocks. A muscovite >biotite granite in the pluton's core is surrounded successively by biotite >muscovite granodiorite, porphyritic biotite >muscovite granodiorite grading to biotite=muscovite granite, ...
Data on geochemistry described by V.N. Lukashin et al.
Sep 05, 2008 ... "This paper reports the results of a geochemical study of suspended particulate matter and particle fluxes in the Norwegian Sea above the Bear Island slope," scientists in Russia report. "The concentrations of suspended particles and the main components of suspended matter were ...
Researchers from Shandong Normal University discuss findings in applied surface science.
Sep 05, 2008 ... "Adsorption of carbon monoxide on Pd(3 1 1) and (2 1 1) stepped surfaces has been investigated by the extended London-Eyring-Polyani-Sato (LEPS) method constructed using a 5-parameter Morse potential. The calculated results show that there exist common characteristics of CO adsorption on ...
Study data from McGill University provide new insights into planetary science.
Sep 05, 2008 ... "Water column samples from the Mackenzie Shelf, the Beaufort Sea, and the Amundsen Gulf were obtained during 2003-2004 to investigate nutrient dynamics in an Arctic ecosystem influenced by a large river and flaw lead polynya. Nutrient inventories in the upper water column showed a ...
Reports outline hydrobiology study findings from P. Duarte and colleagues.
Sep 05, 2008 ... "Ria Formosa is a large (c.a. 100 km(2)) mesotidal lagoon system with large intertidal areas and several conflicting uses, such as fisheries, aquaculture, tourism and nature conservation. Its watersheds cover an area of approximately 864 km(2), with a perimeter of 166 km and a maximum ...
Studies from Y.D. Han et al have provided new data on macromolecular bioscience.
Sep 05, 2008 ... "Model protein bovine serum albumin (BSA) was covalently grafted onto poly[(L-lactide)co-carbonate] microsphere surfaces by ''click chemistry.'' The grafting was confirmed by confocal laser scanning microscopy and X-ray photoelectron spectroscopy," scientists in Changchun, People's ...
Studies in the area of analytical science reported from Lomonosov Moscow State University.
Sep 05, 2008 ... "Screen-printed electrodes modified with carbon paste that consisted of graphite powder dispersed in ionic liquids (IL) were used for the electrochemical determination of dopamine, adrenaline and dobutamine in aqueous solutions by means of cyclic voltammetry. The IL plays a dual role in ...
New findings from K. Ishii and co-researchers in the area of ornamental plants described.
Sep 05, 2008 ... According to recent research published in the journal Propagation of Ornamental Plants, "The effects of CO2 enrichment on surviving and rooting of woody plant cuttings and tissue culture were evaluated. Cuttings of two flower cherries, Prunus incisa Thunb. and Prunus jamasakura Sieb. cv." ...
Studies from P.P. Haridasan and co-researchers update current data on radiation research.(Report)
Sep 05, 2008 ... "This study gives the results of measurements of Th-232 and Ra-228 in the titanium mineral ilmenite and its derived products and an assessment of related radiological issues in mineral separation and titanium dioxide production plants in India. The concentrations of Th-232 and Ra-228 in ...
Scientists at University of Kansas report research in biophysical chemistry.
Sep 05, 2008 ... "The distribution of 1H-pyrrolo[3,2-h]quinoline (PQ), 11H-dipyrido[2,3-a]carbazole (PC) and 7-azaindole (7AI) at a water/membrane interface has been investigated by molecular dynamics (MD) simulations. The MD study focused on favorable binding sites of the azaaromatic probes across a ...
Researchers from University of Melbourne report on findings in science.
Sep 05, 2008 ... According to recent research published in the International Journal of Greenhouse Gas Control, "A simple climate model is used to calculate the benefit, over time, of geosequestration Of C02 that would otherwise be released to the atmosphere. The analysis is performed relative to two ...
Findings from D.H. Doctor and co-researchers advance knowledge in hydrology.
Sep 05, 2008 ... According to a study from the United States, "The stable isotopic composition of dissolved inorganic carbon (delta C-13-DIC) was investigated as a potential tracer of streamflow generation processes at the Sleepers River Research Watershed, Vermont, USA. Downstream sampling showed delta ...
Reports outline botany research from A. Safarnejad and colleagues.
Sep 05, 2008 ... According to a study from Iran, "Water stress is a serious environmental problem throughout the world which may be partially relieved by breeding cultivars that can tolerate low soil water potentials. Alfalfa (Medicago sativa L.) is normally grown in and and semi-arid areas, so the ...
New heterocyclic chemistry study findings have been published by A.C. Razus and colleagues.
Sep 05, 2008 ... "2-(Azulen-1-yl)-4,6-diphenyl substituted pyranylium salts, pyridinium salts and pyridines were efficiently synthesized and the new obtained compounds were completely characterized. Comparative structural analysis between these compounds and their corresponding isomers that contain the ...
Researchers at University of Basel publish new data on organic chemistry.
Sep 05, 2008 ... "Four 4'-hydrazone derivatives of 2,2':6',2 ''-terpyridine which vary in their N- and C-substitution in the R'NN=CRPh unit have been prepared and structurally characterized. Protonation studies and solution behaviour of these compounds are described, as well as representative crystal ...
Research on inorganic chemistry detailed by A.N. Chekhlov and co-authors.
Sep 05, 2008 ... According to a study from Russia, "A new complex salt, 4,7,13,16,21,24-hexaoxa 1,10 diazoniabicyclo[8.8.8]hexacosane penta(nitrato)lanthanate(III) (H-2(Crypt-222)](2+) center dot [La(NO3)(5)](2-)p), is synthesized. Its crystal structure is studied using X-ray diffraction analysis (space ...
Researchers from Jilin University describe findings in polymer chemistry.
Sep 05, 2008 ... "A soluble all-aromatic poly(2,5-diphenyl-1,4-phenylenevinylene) (2,5-DP-PPV) is synthesized by utilizing aromatic phosphonium and aldehyde monomers through Wittig reaction. The H-1 NMR and FTIR measurements indicate that over 50% content of cis-vinylene units exist in polymer backbone," ...
Hong Kong University of Science & Technology reports research in chemistry.
Sep 05, 2008 ... "This paper presents a new synthetic route to hyperbranched polymer," researchers in Hong Kong, People's Republic of China report. "An arylene bipropiolate monomer, dimethylmethylenebis(1,4-phenylene) bipropiolate, was prepared by a one-step esterification reaction of bisphenol ...
Research reports on aquatic geochemistry from J. Poulenard and colleagues provide new insights.
Sep 05, 2008 ... According to recent research from France, "The impact particulate-phosphorus (particulate-P) has on eutrophication of aquatic systems that greatly depends on its composition. As a result, analysis methods for evaluating particulate-P speciation must be capable of identifying and/or ...
New atmospheric chemistry findings from University of Hertfordshire published.
Sep 05, 2008 ... According to recent research from Hatfield, the United Kingdom, "The new European Council Directive (PE-CONS 3696/07) frames the inhalable (PM10) and fine particles (PM2.5) on priority to chemically characterize these fractions in order to understand their possible relation with health ...
Research from University of KwaZulu-Natal in the area of chemical kinetics published.
Sep 05, 2008 ... According to recent research published in the International Journal of Chemical Kinetics, "The formation kinetics of ferroin is studied under varied acid conditions at 25 degrees C and fixed ionic strength (0.48 mol dm(-3)) under pseudo-first-order conditions with respect to Fe2+ by using ...
Research on chemical research reported by M. Sharma et al.
Sep 05, 2008 ... According to recent research published in the Journal of Chemical Research - S, "A configurational study of long-chain N-alkylated pyridinium aldoxime derivatives and their positional isomers has been carried out by two-dimensional H-1-H-1 NOESY (nuclear Overhauser effect spectroscopy) ....
Research from R.F. Klevtsova and co-researchers in the area of structural chemistry published.
Sep 05, 2008 ... According to recent research from Russia, "The crystal structures of the Rh[(EtO)(2)PS2](3) (I) and Co[(PhO)(2)PS2](3) (II) chelate compounds were determined from X-ray diffraction (XRD) data (CAD-4 diffractometer, MoK alpha radiation, 1193 F-hkl,F- R = 0.0516 for I and 513 F-hkl, R = ...
New chemical crystallography data have been reported by scientists at Zhejiang University.
Sep 05, 2008 ... "The title compound (common name eplerenone), C24H30O6, is an aldosterone receptor antagonist," researchers in Hangzhou, People's Republic of China report. "From the isopropyl acetate solution the compound crystallizes in monoclinic space group P 21 with a = 8.811(1) angstrom, b ...
Researchers from University of Tokyo detail findings in geochemical research.(Report)
Sep 05, 2008 ... According to recent research from Kashiwa, Japan, "The ballast parameterization separates sinking organic flux into two parts: the flux associated with ballast minerals and the flux independent of minerals. The ballast parameterization begins to be incorporated into global ocean ...
Studies from P.W. Zhang and colleagues yield new information about medicinal chemistry.
Sep 05, 2008 ... According to a study from the United States, "Novel 7-aryl benzo[1,4]oxazepin-2-ones were synthesized and evaluated as non-steroidal progesterone receptor (PR) modulators. The structure activity relationship of 7-aryl benzo[1,4]oxazepinones was examined using the T47D cell alkaline ...
Reports from Yamaguchi University add new data to research in biochemistry.
Sep 05, 2008 ... "A total of 20 volatile organic compounds from the peel of citrus fruit Ohshima no. 1 were identified by gas chromatography-mass spectrometry (GC-MS). The amount of limonene in Ohshima no. 1 was lower than those in the parent cultivars, Miyauchi iyokan and Yoshiura ponkan, whereas those of ...
Reports from Kyungpook National University add new data to research in neurochemistry.
Sep 05, 2008 ... "The adenosinergic modulation of GABAergic spontaneous miniature inhibitory postsynaptic currents (mIPSCs) was investigated in mechanically dissociated rat tuberomammillary nucleus (TMN) neurons using a conventional whole-cell patch clamp technique. Adenosine (100 mc M) reversibly ...
New findings reported from E.V. Entchev and co-authors describe advances in biological chemistry.
Sep 05, 2008 ... According to recent research from Dresden, Germany, "LET-767 from Caenorhabditis elegans belongs to a family of short chain dehydrogenases/ reductases and is homologous to 17 beta-hydroxysterol dehydrogenases of type 3 and 3-ketoacyl-CoA reductases. Worms subjected to RNA interference ...
Research from Chungbuk National University in physical chemistry provides new insights.
Sep 05, 2008 ... According to a study from South Korea, "The conformational study on N-acetyl-N'-methylamide Of L-lactic acid (Ac-Lac-NHMe, the Lac dipeptide) is carried out using ab initio HF and density functional methods with the self-consistent reaction field method to explore its backbone ...
New Polyvinyl Alcohol Market Research Report.
Sep 05, 2008 ... Research and Markets (http://www.researchandmarkets.com/research/1c628b/polyvinyl_alcohol) has announced the addition of the "Polyvinyl Alcohol Market Research" report to their offering. In-depth market research of chemical industry products on the international and regional ...
Reports from University of Cagliari advance knowledge in physical chemistry.
Sep 05, 2008 ... According to a study from Cagliari, Italy, "Molecular dynamics simulations have been employed to study the thermal behavior of an alloyed Ag-Cu hollow cube with a side about 8 nm long and walls about 2 nm thick." "Gradual heating determines at about 300 K a partial ...
New organic chemistry study findings recently were reported by researchers at University of Bologna.
Sep 05, 2008 ... "We have synthesized molecular clips I comprising (i) two benzo[k]fluoranthene sidewalls and (ii) a dimethylene-connected benzene bridge that carries two acetoxy (1a), hydroxy (1b), or methoxy (1c) substituents in the para position. Their NMR spectra, single-crystal structures, and ...
Investigators at Lomonosov Moscow State University have published new data on structural chemistry.
Sep 05, 2008 ... "The results of quantum-chemical calculations of the formation energy, equilibrium structure, and potential surface sections along the nonrigid degrees of freedom of the silver trifluoroacetate dimer are presented. Calculations were performed by the B3LYP method with the cc-pVTZ ...
Research on neurochemistry published by scientists at Boston College.(Report)
Sep 05, 2008 ... "The objective of this study was to characterize the lipidome and electron transport chain activities in purified non-synaptic (NS) and synaptic (Syn) mitochondria from C57BL/6J mouse cerebral cortex. Contamination from subcellular membranes, especially myelin, has hindered past attempts ...
Investigators at China University have published new data on biochemistry.
Sep 05, 2008 ... According to recent research published in the journal Biochemistry, "Brd4 belongs to the BET family. It is a multifunctional protein involved in transcription, replication, the signal transduction pathway, and cell cycle progression." "All of these functions are linked to its ...
Reports outline heterocyclic chemistry study results from H.A. Abdelaziz et al.
Sep 05, 2008 ... "E-3-(N,N-Dimethylamino)-1-(3-methylthiazolo[3,2-a]benzimidazol-2-yl)prop-2-en-1-one (2) was synthesized by the reaction of 1-(3-methylthiazolo[3,2-a]benzimidazol-2-yl)ethanone (1) with dimethylformamide-dimethylacetal," scientists in Cairo, Egypt report. "The reaction of 2 with ...
Data on physical chemistry discussed by C.C. Tsai and colleagues.
Sep 05, 2008 ... "Exocytosis of a single bovine adrenal chromaffin cell, triggered by histamine stimulation, was investigated via the electric responses detected with single-walled carbon-nanotube field-effect transistors (SWCNT-FET) and the morphological changes acquired by atomic force microscopy (AFM) ....
Reports on organic chemistry findings from Nankai University provide new insights.
Sep 05, 2008 ... "Aza-modifications of phenanthroindolizidine and phenanthroquinolizidine alkaloids were firstly designed to produce two aza-analogues, 13a-azatylophorine and 14a-aza-7-methoxylcryptopleurine starting from hydrazine monohydrate with high overall yields, respectively," researchers in ...
New research on physical chemistry from University of Sao Paulo summarized.
Sep 05, 2008 ... "In this work, we investigate the nonlinear absorption dynamics of Zn phthalocyanine in dimethyl sulfoxide (DMSO). We used single pulse and pulse train Z-scan techniques to determine the dynamics and absorption cross-sections of singlet and triplet states at 532 nm," scientists in Sao ...
Research from University of Buenos Aires provides new data on chemical research.
Sep 05, 2008 ... According to recent research from Buenos Aires, Argentina, "Heterogeneous electron transfer of proteins at biomimetic interfaces is characterized by unusual distance dependences of the electron-transfer rates, whose origin has been elusive and controversial." "Using a ...
Research from D. Rodriguez and colleagues has provided new data on atmospheric chemistry.
Sep 05, 2008 ... According to recent research from Toledo, Spain, "The reactions of three structurally similar unsaturated alcohols, 2-buten-1-ol (crotyl alcohol), 2-methyl-2-propen-1-ol (MPO221) and 3-methyl-2-buten-1-ol (MBO321) with Cl atoms, have been investigated for the first time, using a 400 1 ...
Studies by M. Rauch and co-authors describe new findings in biogeochemistry.
Sep 05, 2008 ... According to recent research from Wimereux, France, "The effect of phytodetritus derived from Phaeocystis sp. bloom on benthic mineralization processes has been determined at four intertidal stations along the French coast of the eastern English Channel. Sites were chosen to offer a ...
Research from Kuwait University broadens understanding of heterocyclic chemistry.
Sep 05, 2008 ... According to a study from Kuwait, "The utilization of arylhydrazononitriles (6-9) for synthesis of azoles is demonstrated." "Thus, arylazomalononitriles (6) reacted with hydroxylamine hydrochloride to afford isoxazol-5-imine (10), amidoxime (12) and bis-amidoxime (13) ...
Studies from University of Geneva provide new data on physical chemistry.
Sep 05, 2008 ... "The photophysical properties of multichromophoric systems consisting of eight red or blue naphthalene diimides (NDIs) covalently attached to a p-octiphenyl scaffold, as well as a blue bichromophoric system with a biphenyl scaffold, have been investigated in detail using femtosecond ...
Reports on heterocyclic chemistry findings from B. Himmi and co-researchers provide new insights.
Sep 05, 2008 ... "Seven new 5,7-disubstituted oxine derivatives have been synthesized via a Mannich reaction between a sec. amine (e.g. piperidine, pyrrolidine, morpholine, or dibenzylamine,) and 5-cyano or 5-azidomethyl-8-hydroxyquinoline, which were respectively obtained by nucleophilic displacement of ...
Examine Market Research for the Ammonium-Calcium Nitrate and Calcium Nitrate Industries: Including Applications, Regional Markets & Main Manufacturers.
Sep 05, 2008 ... Research and Markets http://www.researchandmarkets.com/research/97e2ed/ammoniumcalcium_n) has announced the addition of the "Ammonium-calcium Nitrate and Calcium Nitrate Market Research" report to their offering. In-depth market research of chemical industry products on the ...
Scientists at National Oceanic and Atmospheric Administration publish research in planetary science.(Report)
Sep 05, 2008 ... According to a study from the United States, "The chemical composition of the mixing layer above the tropopause, which is mainly influenced by stratosphere troposphere exchange, impacts the chemistry and radiative balance of the troposphere. A better understanding of its seasonal and ...
New data from N. Masurier et al illuminate research in organic chemistry.
Sep 05, 2008 ... "The Duff reaction (HMTA, AcOH or TFA) was studied on substituted [6 + 5] heterocyclic compounds," scientists in Clermont-Ferrand, France report. "This reaction provides a useful route to aldehydes for Compounds bearing sensitive amide functions. It gives also access to ...
Research from University of Jena has provided new data on medicinal chemistry.
Sep 05, 2008 ... According to recent research from Jena, Germany, "Dibenzo- and benzindolo-azecines represent a novel class of high-affinity dopamine receptor antagonists." "To further characterize these drugs as potential neuroleptics, we selected a set of azecine derivatives and ring expanded ...
New findings in physical chemistry described by E. Shirman and co-researchers.
Sep 05, 2008 ... According to recent research published in the Journal of Physical Chemistry B, "Perylene diimide (PDI) bearing polyethylene glycol substituents at the imide positions was reduced in water with sodium dithionite to produce an aromatic dianion. The latter is stable for months in deoxygenated ...
Study data from University of Rochester update knowledge of organic chemistry.
Sep 05, 2008 ... "Photoinitiated triplet quantum amplified isomerizations (QAI) of substituted Dewar benzene derivatives in polymeric media are reported. The quantum efficiencies and the ultimate extents of reactant-to-product conversions increase significantly with the incorporation of appropriate ...
Research on physical chemistry published by scientists at Vrije University Amsterdam.
Sep 05, 2008 ... According to recent research from Netherlands, "The determination of absolute configurations of chiral compounds using VCD is performed by comparing measured vibrational circular dichroism (VCD) spectra with calculated spectra. The process is based on two facts: the two enantiomers have ...
Reports outline chemical research study findings from S.R. Martin and colleagues.(Report)
Sep 05, 2008 ... According to recent research published in the Journal of the American Chemical Society, "Although alcohols are well-known to be protein denaturants when present at high concentrations, their effect on proteins at low concentrations is much less well characterized. In this paper, we present ...
Findings from University of New South Wales advance knowledge in chemical research.
Sep 05, 2008 ... "The measurements of electron work function were applied for in situ monitoring of the charge transfer during oxidation and reduction for well-defined titanium dioxide, TiO2, at room temperature. The TiO2 specimen was initially standardized at 1173 K in the gas phase of controlled oxygen ...
New biochemistry study findings recently were published by researchers at University of Texas.
Sep 05, 2008 ... "Interaction of urokinase-type plasminogen activator (uPA) with its receptor, uPAR, is a key regulatory step in uPA-mediated cell proliferation and migration. Our previous studies demonstrated that posttranscriptional stabilization of uPAR mRNA by uPA contributes to the induction of cell ...
Recent findings in organic chemistry described by researchers from University of Paris.
Sep 05, 2008 ... "Unsaturated malonyl esters underwent Pd-catalyzed intramolecular allylic alkylation to give 4-vinyl-substituted gamma-lactones. In contrast to the formerly studied cyclization of malonamides, this reaction could be achieved only with a substrate incorporating a suitably positioned silicon ...
Recent findings in chemical research described by researchers from Dublin City University.
Sep 05, 2008 ... "Molecular junctions incorporating monolayers of surface-active cyclodextrins have been formed by bringing macroscopic platinum and mercury electrodes together. Monolayers of the host di-6A,6B-deoxy-6-(4-pyridylmethyl)amino-gamma-cyclodextrin (CD) have been formed on platinum electrodes ...
New findings reported from University of Duisburg-Essen describe advances in chemical research.
Sep 05, 2008 ... According to a study from Essen, Germany, "Artificial molecular clips and tweezers, designed for cofactor and amino acid recognition, are able to inhibit the enzymatic activity of alcohol dehydrogenase (ADH). IC50 values and kinetic investigations point to two different new mechanisms of ...
Research from G. Li et al broadens understanding of physical chemistry.
Sep 05, 2008 ... According to recent research published in the Journal of Physical Chemistry C, "A series of new organic D-g-A dyes, coded as DS-1, DS-2, DS-3, and DS-4, was designed, synthesized, and characterized by H-1 NMR, C-13 NMR, infrared spectroscopy, mass spectrometry, and elemental analysis ....
Studies from V.R. Akepati et al in the area of neurochemistry described.
Sep 05, 2008 ... According to recent research from Berlin, Germany, "OPA1, a nuclear encoded mitochondrial protein causing autosomal dominant optic atrophy, is a key player in mitochondrial fusion and cristae morphology regulation. In the present study, we have compared the OPA1 transcription and ...