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Kersten Michael M Geosciences Institute, Johannes Gutenberg-University, Mainz 55099, - - 2014
A surface complexation modeling approach was used to extend the knowledge about processes that affect the availability of dimethylarsinic acid (DMA) in the soil rhizosphere in presence of a strong sorbent, e.g., Fe plaques on rice roots. Published spectroscopic and molecular modeling information suggest for the organoarsenical agent to form ...
Tsuge Masashi - - 2014
We have studied hydrogen-atom tunneling in the cis-to-trans conformational change of some carboxylic acid monomers and formic acid (FA) complexes and dimers at the MP2(full) and CCSD(T) levels of theory within the Wentzel-Kramers-Brillouin approximation. The barrier for the minimum energy path, where the OH bond length and the COH bending ...
Peña Isabel - - 2014
The rotational spectra of laser ablated picolinic and isonicotinic acids have been studied using broadband chirped pulse (CP-FTMW) and narrowband molecular beam (MB-FTMW) Fourier transform microwave spectroscopies. Two conformers of picolinic acid, s-cis-I and s-cis-II, and one conformer of isonicotinic acid have been identified through the analysis of their rotational ...
Mohamed Ibrahim O IO Department of Food Science, College of Food and Agriculture, United Arab Emirates University, P.O. Box 15777, Al-Ain, United Arab Emirates, - - 2014
The main goal of the present research is to restructure olive oil triacylglycerol (TAG) using enzymatic acidolysis reaction to produce structured lipids that is close to cocoa butter in terms of TAG structure and melting characteristics. Lipase-catalyzed acidolysis of refined olive oil with a mixture of palmitic-stearic acids at different ...
Barrett Seth M SM Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United - - 2014
Visible light-triggered hydride transfer from [Cp*Ir(bpy)(H)](+) (1) to organic acids and 1-methylnicotinamide (MNA(+)) is reported (Cp* = pentamethylcyclopentadienyl; bpy = 2,2'-bipyridine). A new thermochemical cycle for determining excited-state hydride donor ability (hydricity) predicted that 1 would be an incredibly potent photohydride in acetonitrile. Phototriggered H2 release was indeed observed from ...
Santos Olívia de Souza Heleno OD Instituto de Ciências Exatas e Biológicas, Departamento de Química, Universidade Federal de Ouro Preto - UFOP, 35400-000 Ouro Preto, MG, Brazil. Electronic address: - - 2014
Manganese recovery from industrial ore processing waste by means of leaching with sulfuric acid was the objective of this study. Experimental conditions were optimized by multivariate experimental design approaches. In order to study the factors affecting leaching, a screening step was used involving a full factorial design with central point ...
Chen Mingshun M College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China; Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, - - 2015
Response surface methodology was used to optimise experimental conditions for ultrasonic-assisted extraction (UAE) of functional components from sugar beet molasses. The central composite design (CCD) was used for the optimisation of extraction parameters in terms of total phenolic contents, antioxidant activities and anthocyanins. Result suggested the optimal conditions obtained by ...
Zaretsky Serge - - 2014
The factors determining diastereoselectivity observed in the multicomponent conversion of amino acids, aziridine aldehyde dimers, and isocyanides into chiral piperazinones, have been investigated. Amino acid-dependent selectivity for either trans- or cis-substituted piperazinone products has been achieved. An experimentally determined diastereoselectivity model for the three-component reaction driven by aziridine aldehyde dimers ...
Liu Lei - - 2014
The pH related fluorescence quenching mechanism of 2-amino-4-hydroxypteridine (pterin), a biologic functional molecule, in the presence of acetate ion has been fully investigated for the first time. Using a combined experimental and theoretical approach we discover that the fluorescence quenching observed in acid condition is originated from a barrier-less excited ...
Godziek Agnieszka A Institute of Chemistry, University of Silesia, 9 Szkolna Street, Katowice 40-006, - - 2014
This is our new study in a series of publications devoted to exploration of applicability of high-performance liquid chromatography (HPLC) to providing answers to difficult questions from the area of the reaction kinetics and mechanisms with non-linear reactions. Although an excellent analytical performance of HPLC is an indisputable fact, so ...
Rasik Christopher M CM Indiana University , Department of Chemistry, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United - - 2014
A detailed analysis of a Lewis acid promoted ketene-alkene [2 + 2] cycloaddition is reported. The studies have led to a rationalization for an observed inversion of diastereoselectivity between thermally induced and Lewis acid promoted ketene-alkene [2 + 2] cycloadditions. The model is supported with both experimental and computational results.
Park Chanhun C Department of Chemical Engineering, Hanyang University, Seoul 133-791, South - - 2014
The economically-efficient separation of formic acid from acetic acid and succinic acid has been a key issue in the production of formic acid with the Actinobacillus bacteria fermentation. To address this issue, an optimal three-zone simulated moving bed (SMB) chromatography for continuous separation of formic acid from acetic acid and ...
Perales-Rondón Juan Victor - - 2014
In order to improve catalytic processes, elucidation of reac-tion mechanisms is essential. Here, supported by a combina-tion of experimental and computational results, the oxida-tion mechanism of formic acid on Pt(111) electrodes modified by the incorporation of bismuth adatoms is revealed. In the proposed model, formic acid is first physorbed, on ...
Surapaneni K M KM Department of Biochemistry, Saveetha Medical College and Hospital, Faculty of Medicine, Saveetha University, Saveetha Nagar, Thandalam, Chennai, Tamilnadu, India. - - 2014
Non-Alcoholic Steatohepatitis (NASH) is a severe form of Non Alcoholic Fatty Liver Disease (NAFLD) spectrum, which progresses to the end stage liver disease. A common denominator in the pathogenesis of insulin resistance and nonalcoholic steatohepatitis is increased oxidative stress. Hepatic induction of the pro-oxidant enzyme Cytochrome P450 2E1 (CYP2E1) occurs ...
Amos Ruth I J RI School of Chemistry, The University of Sydney, Sydney, NSW 2006 (Australia); CSIRO Energy Transformed Cluster on Biofuels and Research School of Chemistry, Australian National University, Canberra, ACT 0200 (Australia); ARC Centre of Excellence for Free Radical Chemistry and Biotechnology (Australia). - - 2014
A robust catalyst for the selective dehydrogenation of formic acid to liberate hydrogen gas has been designed computationally, and also successfully demonstrated experimentally. This is the first such catalyst not based on transition metals, and it exhibits very encouraging performance. It represents an important step towards the use of renewable ...
Sharma Ashwani A Laboratoire de Chimie Moléculaire, Department of Chemistry, Ecole Polytechnique, CNRS, 91128, Palaiseau Cedex, - - 2014
The performances of quantum chemistry methods (i.e., DFT and ab initio) in calculating the structural and vibrational properties of phosphates and phosphorylated compounds have been evaluated. Diethyl-phosphate, phosphonic acid, dihydrogen phosphate anion, phosphoric acid dimer and protonated glycylphosphotyrosine dipeptide were selected for our study. Geometry and harmonic frequency deviations were ...
Zhang Bo B Center for Viticulture and Enology, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, - - 2015
In the present research, the copigmentations of malvidin-3-O-glucoside with five hydroxybenzoic cofactors (p-hydroxybenzoic acid, protocatechuic acid, gallic acid, vanillic acid, and syringic acid) were investigated. The influence of the concentration of these cofactors and the reaction temperature was examined. The equilibrium constant (K), stoichiometric ratio (n) and the thermodynamic parameters ...
Ozkan Of - - 2014
We investigated the relationship between serumlevels of total sialic acid, lipid bound sialic acid and acutepancreatitis in a rat model of a common bile duct ligationinduced acute pancreatitis. Twenty five Sprague-Dawley male rats weighing 250-300g were divided into two groups (n=10: control, n=15:experimental). In the control group only a sham ...
Todoroki Kenichiro K Laboratory of Analytical and Bio-Analytical Chemistry, School of Pharmaceutical Sciences, University of - - 2014
We have developed a convenient method for predicting the LC resolution of amino acid diastereomers through computational calculations. For acquiring experimental data, we derivatized 10 amino acids using o-phthalaldehyde and N-acetyl-L-cysteine as fluorogenic diastereomer-forming reagents and analyzed the diastereomers using reversed-phase LC and fluorescence detection. For theoretical chemical calculations, we ...
Mioso Roberto R Departamento de Química Universidad de Las Palmas de Gran Canaria Gran Canaria Spain Departamento de Química, Universidad de Las Palmas de Gran Canaria, Gran Canaria, - - 2014
The chemical screening carried out on Schizochytrium sp. biomass led the identification of 24 types of organic compounds belonging to n-alkanes, 1-alkenes, 1-alkanols, free fatty acids, methyl and ethyl esters of saturated and unsaturated fatty acids, saturated tri- and diglycerides, unsaturated monoglycerides, wax esters, sterols, triterpenes, and mono- and sesquiterpenes. ...
Grabacka Maja M Department of Food Biotechnology, Faculty of Food Technology, University of Agriculture, Krakow 30- 149, ul. Balicka 122, Poland. - - 2013
Tumor cells show metabolic features distinctive from normal tissues, with characteristically enhanced aerobic glycolysis, glutaminolysis and lipid synthesis. Peroxisome proliferator activated receptor α (PPAR α) is activated by nutrients (fatty acids and their derivatives) and influences these metabolic pathways acting antagonistically to oncogenic Akt and c-Myc. Therefore PPAR α can ...
Hanessian Stephen - - 2012
Dual conformational restriction: A new, highly constrained modification of the α-L-locked nucleic acid (α-L-LNA) scaffold that locks the sugar furanose ring in an N-type configuration and also restricts rotation around torsion angle γ was synthesized. This new modification increases the thermostability of an oligonucleotide duplex compared to using a single ...
Sarici Dilek D Division of Neonatology, Faculty of Medicine, Erciyes University, KayseriDivision of Pediatric Cardiology, Department of Pediatrics, Faculty of Medicine, Erciyes University, KayseriDepartment of Medical Genetics, Faculty of Medicine, Erciyes University, Kayseri, - - 2013
We report a newborn with asymmetric crying face and other anomalies whose mother had taken isotretinoin during the first month of pregnancy. We hypothesize that asymmetric crying face is a finding of retinoic acid embryopathy and results from the intrauterine effects of retinoic acid on the development of the depressor ...
Wang Liang - - 2012
Au nanoparticles with small sizes (1-4 nm) were effectively formed on Mg-Al mixed oxides (Au/MAO), which showed superior catalytic performances and good recyclability in aerobic homocoupling of phenylboronic acid.
Wang Fudong F Department of Chemistry and Center for Materials Innovation, Washington University, Saint Louis, Missouri 63130-4899, United States. - - 2012
Di-n-octylphosphine oxide (DOPO) and di-n-octylphosphinic acid (DOPA), as two of impurities found in commercial tri-n-octylphosphine oxide (TOPO), generate significant differences in the outcomes of CdSe-nanocrystal (NC) syntheses. Using n-tetradecylphosphonic acid (TDPA) as the primary acid additive, quantum dots (QDs) are grown with DOPO added, whereas quantum rods (QRs) are grown ...
Rodríguez-Mateos Ana - - 2011
The health benefits of blueberry consumption on the vascular system and brain are mediated in part by their flavonoid content. In light of this, we analyzed six cultivated highbush blueberry varieties (Vaccinium corymbosum L.) and one lowbush or wild blueberry (Vaccinium angustifolium L.) for their anthocyanin, flavanol oligomer and chlorogenic ...
Nishiguchi Noriaki - - 2011
The solid-state chiral optical properties (circular dichroism and circularly polarized luminescence) of a 2-naphthalenecarboxylic acid/amine supramolecular organic fluorophore can be controlled by changing the aryl unit of the chiral 1-arylethylamine component of the molecule rather than altering the chirality of the 1-arylethylamine itself.
Gupta Sheetal - - 2011
Flour was fortified with premix containing ferrous fumarate and folic acid. Organic acids such as citric acid, malic acid and tartaric acid, which are promoters of iron bioavailability, were added at three levels and their influence on rheological and bread-making characteristics was studied. Farinograph water absorption increased with fortificants, but ...
Froissard Didier - - 2011
Six French ferns were investigated for volatile organic compounds (VOC) by GC-MS using organic solvent extraction. Seventy-seven VOC biosynthesized from the shikimic, lipidic and terpenic pathways, including isoprenoid derivatives, were identified from these putative natural resources. Asplenium trichomanes subsp. trichomanes contained mainly polyketides with an oily or waxy odor. (E)-2-Hexenal ...
Shaikh Saame Raza - - 2012
Fish oil, enriched in bioactive n-3 polyunsaturated fatty acids (PUFA), has therapeutic value for the treatment of inflammation-associated disorders. The effects of n-3 PUFAs are pleiotropic and complex; hence, an understanding of their cellular targets and molecular mechanisms of action remains incomplete. Here we focus on recent data indicating n-3 ...
Pawar Siddhesh Nitin - - 2011
Alginates are (1→4) linked linear copolysaccharides composed of β-D-mannuronic acid (M) and its C-5 epimer, α-L-guluronic acid (G). Several strategies to synthesize organically modified alginate derivatives have been reported, but almost all chemistries are performed in either aqueous or aqueous-organic media. The ability to react alginates homogeneously in organic solvents ...
Wang Yizhou - - 2011
Stomatal guard cells play a key role in gas exchange for photosynthesis and in minimizing transpirational water loss from plants by opening and closing the stomatal pore. The bulk of the osmotic content driving stomatal movements depends on ionic fluxes across both the plasma membrane and tonoplast, the metabolism of ...
Calveyra J C - - 2011
The effect of organic acids and mannanoligosaccharide addition to the diet was assessed in pigs orally inoculated with Salmonellatyphimurium. Forty-six growers were distributed among four treatments: Basal Diet (BD); BD+encapsulated organic acids; BD+free organic acids; BD+mannanoligosaccharide. Seroconversion was monitored, and feces and tissue samples were tested for Salmonella isolation. No ...
Hirano Atsushi - - 2011
Effect of polyethylene glycol (PEG) on protein solubility has been primarily ascribed to its large hydrodynamic size and thereby molecular crowding effect. However, PEG also shows characteristics of organic solvents. Here, we have examined the solubility of glycine and aliphatic and aromatic amino acids in PEG solutions. PEG400, PEG4000 and ...
Okada Masahiro - - 2011
Bacillus subtilis and related bacilli produce a post-translationally modified oligopeptide, ComX pheromone, that stimulates natural genetic competence controlled by quorum sensing. The ComX pheromones are formed by geranylation or farnesylation on a tryptophan residue at the 3 position of its indole ring. This results in the formation of a tricyclic ...
Fall Nils - - 2011
Fatty acids, vitamins and minerals in milk are important for the human consumer, the calf and the cow. Studies indicate that milk from organic and conventional dairy herds may differ in these aspects. The aim of this study was therefore to investigate whether there are differences in the fatty acid ...
Song Chen - - 2011
Gas-particle partitioning theory is widely used in atmospheric models to predict organic aerosol loadings. This theory predicts that secondary organic aerosol (SOA) yield of an oxidized volatile organic compound (VOC) product will increase as the mass loading of preexisting organic aerosol increases. In a previous study, we showed that the ...
Walvoort Marthe T C - - 2011
The reactivity of a variety of mannopyranosyl uronic acid donors was assessed in a set of competition experiments, in which two (S)-tolyl mannosyl donors were made to compete for a limited amount of promoter (NIS/TfOH). These experiments revealed that the reactivity of mannuronic acid donors is significantly higher than expected ...
Fytas Christos - - 2011
We describe novel acetohydroxamic acid derivatives with potent activity against cultured bloodstream-form Trypanosoma brucei and selectivity indices of >1000. These analogues were derived from conformationally constrained, lipophilic, spiro carbocyclic 2,6-diketopiperazine (2,6-DKP) scaffolds by attaching acetohydroxamic acid moieties to the imidic nitrogen. Optimal activity was achieved by placing benzyl groups adjacent ...
Mulla Melissa J MJ Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology & Reproductive Sciences, Yale University, New Haven, CT 06510, - - 2011
Preeclampsia is associated with hyperuricemia, which correlates with the disease severity. Levels of circulating uric acid increase before the clinical manifestations, suggesting that they may be causally related. Uric acid, or monosodium urate (MSU), activates the Nod-like receptor, Nalp3, leading to inflammasome activation and IL-1β processing. Because preeclampsia is associated ...
Uyguner-Demirel C S - - 2011
In this review, special interest was devoted to provide information on the surrogate parameters expressing both quality and quantity of organic matter for the understanding of the photocatalytic oxidation of humic substances. Detailed investigation was directed to the application of photocatalysis with reference to source, origin and modeling of organic ...
Bonaventure Gustavo - - 2011
The identity and number of the lipases involved in the activation of oxylipin biosynthesis remain controversial. In this study we demonstrate that NaGLA1 in Nicotiana attenuata is a specific supplier of trienoic fatty acids for JA biosynthesis in leaves and roots after wounding and simulated herbivory and that it utilizes ...
Blasco L - - 2011
Propionic acid bacteria (PAB) are very important as starter cultures for dairy industry in the manufacture of Swiss-type cheeses, in which they are involved in the formation of eyes and are responsible for the typical flavour and aroma. These characteristics are mainly due to the classical propionic acid fermentation, but ...
Tuberoso Carlo I G - - 2011
Rare unifloral willow (Salix spp.) honeys obtained from nectar or honeydew were investigated by direct RP-HPLC-DAD method in order to identify and quantify compounds that can be used as possible markers of their origin. Antioxidant and antiradical activities of willow honeys were evaluated using FRAP (=ferric reducing antioxidant assay) and ...
Ban Xiaoquan - - 2011
The inflorescence of cultivated Coptis chinensis has been valued for tea production for many years in China. The antioxidant activities of C. chinensis inflorescence extracts prepared by various solvents were investigated by using several established in vitro systems: 2,2'-azinobis(3-ethylbenzthiazoline-6-sulphonic acid (ABTS), α,α-diphenyl-β-picrylhydrazyl (DPPH) and superoxide radical scavenging assays, reducing power ...
Chung Cheng-Pei - - 2011
Adlay (Coix lachryma-jobi L. var. ma-yuen Stapf.) seeds have long been used to treat warts, chapped skin, rheumatism, and neuralgia in traditional Chinese medicine (TCM). Recently, studies demonstrated its anti-inflammatory, antiproliferative, antitumor, and antiallergic activities. In the present study, we first report the gastroprotective effects of dehulled adlay (DA) seeds, ...
Zofou Denis - - 2011
In order to assess the potential of the stem bark of Kigelia africana (Lam.) Benth as source of new anti-malarial leads, n-hexane and ethyl acetate (EtOAc) extracts and four compounds isolated from the stem bark were screened in vitro against the chloroquine-resistant W-2 and two field isolates of Plasmodium falciparum ...
Mùˆller Lars - - 2011
Several studies have implicated the potent antioxidant properties of lycopene. However, most of the studies used only the (all-E)-isomer. (Z)-Isomers of lycopene were found in substantial amounts in processed foods and in human tissues. In the present study, we investigated in vitro the antioxidant activity of (5Z)-, (9Z)-, and (13Z)-lycopene ...
Spencer Cody M CM Department of Biochemistry and Biophysics, University of Rochester Medical Center, 601 Elmwood Ave., Box 712, Rochester, NY 14642, - - 2011
We have previously reported that human cytomegalovirus (HCMV) infection induces large-scale changes to host cell glycolytic, nucleic acid, and phospholipid metabolism. Here we explore the viral mechanisms involved in fatty acid biosynthetic activation. Our results indicate that HCMV targets ACC1, the rate-limiting enzyme of fatty acid biosynthesis, through multiple mechanisms. ...
Zhao Wei - - 2011
Oleoyl Formononetin (OF) has good weight loss activity and hypolipidemic activity, could improve insulin sensitivity and suppress adipogenesis. To acquire better biological activities, three series of flavonoid fatty acid esters were designed and synthesized by optimizing the structure of OF. Their bioactivities were assayed in vitro. Some of these novel ...
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