Search Results
Results 51 - 100 of 2847
1 2 3 4 5 6 7 8 9 10 >
Crépin Damien F P - - 2014
Significant rate enhancements in the Diels-Alder reaction of alkynes and 2-pyrones bearing a Lewis basic group are observed when a combination of alkynyltrifluoroborates and BF3.OEt2 are used. This process generates functionalized aromatic compounds with complete regiocontrol. The origin of the observed rate enhancement has been studied by DFT methods, and ...
Sang Li-Jia - - 2014
Discrimination of glycoproteins with different glycans is a significant but difficult issue. We presented here a new strategy for strengthening the discriminating of glycoproteins by introducing a new signaling channel, fluorescence polarization (FP), into a "the single probe with three signaling channels" sensor array. The single probe was aminophenylboronic acid ...
Yan Jin-Wu JW School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China. tanjiah@mail.sysu.edu.cn - - 2014
A tailor-made colorimetric and red-emitting fluorescent dual probe for G-quadruplex nucleic acids was developed by incorporating a coumarin-hemicyanine fluorophore into an isaindigotone framework. The significant and distinct changes in both the color and fluorescence of this probe enable the label-free and visual detection of G-quadruplex structures.
Zhang Xin X Department of Chemistry, Shanghai University, Shanghai 200444, PR - - 2014
A glassy carbon electrode modified with poly(alizarin red)/electrodeposited graphene (PAR/EGR) composite film was prepared and applied to detect ciprofloxacin (CPFX) in the presence of ascorbic, uric acid and dopamine. The morphology and interface property of PAR/EGR films were examined by scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). The ...
Sammaiah Arukali A Centre for Lipid Research, CSIR-Indian Institute of Chemical - - 2014
Vegetable oils are being investigated as potential source of environmentally favorable lubricants over synthetic products. Jatropha curcas L. oil (JO) identified as a potential raw material for biodiesel was explored for its use as a feedstock for biolubricants. Epoxidized jatropha oil (EJO) was prepared by peroxyformic acid generated in situ ...
Wang Nanxi - - 2014
By using a directed evolution approach, we have identified aminoacyl-tRNA synthetase variants with significantly enhanced activity for the incorporation of unnatural amino acids into proteins in response to the amber nonsense codon in bacteria. We demonstrated that the optimization of anticodon recognition of tRNA by aminoacyl-tRNA synthetase led to improved ...
Xu Li L Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan, 430072, People's Republic of China. - - 2014
We designed and synthesized a new amino-functionalized tetraphenylethene (TPE) derivative as a highly sensitive dye for the detection of dsDNA and oligonucleotide in both solution and a gel matrix. We further revealed that the cis configuration dye showed a much higher sensitivity than its trans isomer for the first time.
Ellis Joshua T JT Utah State University, Department of Biological Engineering, 4105 Old Main Hill, Logan, UT 84322-4105, - - 2014
We demonstrated the production of hydrogen, ethanol, and a variety of acids by several Clostridium species using cheese whey as substrate. These species were isolated from the anaerobic sediments of a municipal wastewater stabilization pond. Eight isolates were obtained and all were classified taxonomically as Clostridium spp. based on 16S ...
Maharaj K K Department of Chemical Engineering, University of Pretoria, Lynnwood Road, Private Bag X20, Hatfield, 0002, Pretoria, South Africa, - - 2014
Continuous anaerobic fermentations were performed in a biofilm reactor packed with Poraver® beads. Dilution rates (D) varied between 0.054 and 0.72 h(-1), and D-glucose and CO2 gas were used as carbon substrates. Steady-state conditions were shown to be repeatable and independent of the operational history. Production stability was achieved over periods ...
Radacsi Norbert N Process & Energy Laboratory, Delft University of Technology, Leeghwaterstraat 44, 2628 CA Delft, The - - 2014
Evaporative crystallization is widely applied in several industrial processes, including the pharmaceutical industry. Microwave irradiation can significantly speed up solvent evaporation in these crystallization processes, resulting in reduced particle size due to rapid crystallization. A single-mode microwave setup was used for evaporative crystallization of the model active pharmaceutical ingredient, niflumic ...
Jabeur Hazem - - 2014
Fatty acids composition as an indicator of purity suggests that linolenic acid content could be used as a parameter for the detection of extra/virgin olive oil fraud with 5% of soybean oil. The adulteration could also be detected by the increase of the trans-fatty acid contents with 3% of soybean ...
Cambon Emmanuelle E Université de Toulouse; INSA,UPS,INP; LISBP, 135 Avenue de Rangueil, F-31077, Toulouse, France; CNRS, UMR5504, F-31400, Toulouse, France; INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés, F-31400, Toulouse, - - 2014
Amylosucrase from Neisseria polysaccharea is a remarkable transglucosylase that synthesizes an insoluble amylose-like polymer from sole substrate sucrose. One particular amino acid, Arg226, was proposed from molecular modeling studies to play an important role in the formation of the active site topology and in the accessibility of ligands to the ...
Wang Shuye S School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of - - 2014
A new member of the family of methoxylalkylamino monosubstituted β-cyclodextrins, mono-6(A) -(4-methoxybutylamino)-6(A) -β-CD, has been developed as a chiral selector for enantioseparation in capillary electrophoresis. This amino cyclodextrin exhibited good enantioselectivities for 16 model acidic racemates including three dansyl amino acids at an optimum pH of 6.0. Excellent chiral resolutions ...
Qiao Zhi-Jun ZJ Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China; Synergetic Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, PR - - 2014
Two kinds of hierarchical porous carbons (HPCs) with specific surface areas of 2000m(2)g(-1) were synthesized using leonardite humic acids (LHA) or biotechnology humic acids (BHA) precursors via a KOH activation process. Humic acids have a high content of oxygen-containing groups which enabled them to dissolve in aqueous KOH and facilitated ...
Zhang Liming L Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, - - 2014
To improve ethanol productivity with few inhibitors generated, a novel process of combined alkaline peroxide (AP) pretreatment and semi-simultaneous saccharification and fermentation (SSSF) was developed in this work. Pretreatment with 10% ( [Formula: see text] ) H2O2 at 160°C for 2h followed by SSSF was found to be the optimal ...
Van Pelt D W DW Substrate Metabolism Laboratory, School of Kinesiology, University of Michigan, Ann Arbor, - - 2014
Background:Although obesity is commonly linked with metabolic disease risk, some obese adults do not develop metabolic abnormalities, such as insulin resistance.Objectives:The primary aim of this study was to determine whether alterations in fatty acid mobilization and uptake underlie differences in insulin sensitivity (Si) among a seemingly homogeneous cohort of obese ...
Szabo Steven T ST Durham Veterans Affairs Medical Center and VA Mid-Atlantic MIRECC, 508 Fulton Street, Mental Health Service Line (116A), Durham, NC - - 2014
Veteran populations are exposed to multiple stressful events, and suicidality among veterans is a serious problem. Identifying biomarkers of suicidality may enhance detection, prevention, and treatment. Multiple neurotransmitter systems are implicated in the neurobiology of suicidality, including amino acid neurotransmitter systems. Amino acids as biomarker candidates for suicidality were quantified ...
Ruckenstuhl Christoph C Institute for Molecular Biosciences, University of Graz, Graz, - - 2014
Reduced supply of the amino acid methionine increases longevity across species through an as yet elusive mechanism. Here, we report that methionine restriction (MetR) extends yeast chronological lifespan in an autophagy-dependent manner. Single deletion of several genes essential for autophagy (ATG5, ATG7 or ATG8) fully abolished the longevity-enhancing capacity of ...
Yi Xin X Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China ; Cardiovascular Research Institute of Wuhan University, Wuhan, Hubei 430060, P.R. - - 2014
The aim of the present study was to conduct an updated meta-analysis of relevant randomized controlled trials (RCTs) in order to estimate the effect of folic acid supplementation on endothelial function and the concentration of plasma homocysteine in patients with coronary artery disease (CAD). An extensive search of PubMed was ...
Essawy Amr A AA Chemistry Department, Faculty of Science, Fayoum University, 63514 Fayoum, - - 2014
The complexes of Sm(III) and Tb(III) with 2-aminobenzoic acid (anthranilic acid, AA) and 2-amino-5-chlorobenzoic acid (5-chloroanthranilic acid, AACl) were synthesized and characterized based on elemental analysis, IR and mass spectroscopy. The data are in accordance with 1:3 [Metal]:[Ligand] ratio. On the basis of the IR analysis, it was found that ...
Munro Daniel D Department of Biology, Université du Québec à Rimouski, Campus de Rimouski, 300, allée des Ursulines, C. p. 3300, succ. A, Rimouski, Québec G5L 3A1, Canada. - - 2014
The susceptibility of membrane lipids to peroxidation (peroxidation index [PI]) increases with the double bond content of fatty acids and is inversely correlated to longevity in mammals, birds, and bivalve molluscs. In molluscs, membrane polyunsaturated fatty acids content can be affected by temperature, nutrition, and the individual's age. In this ...
Chen Chi C School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, HUBEI 430074, People's Republic of China. - - 2014
The adsorption of several acidic gases (CO2, NO2 and SO2) on light metal (Li, Al) decorated graphene oxide (GO) is theoretically studied, based on the first-principles calculations. Configuration relaxation, binding energy and charge transfer are carried out to discuss the acidic gas adsorption ability of light metal decorated GO. It ...
Chen Liwei L School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore, - - 2014
Production of biofuels derived from microbial fatty acids has attracted great attention in recent years owing to their potential to replace petroleum-derived fuels. To be cost competitive with current petroleum fuel, flux toward the direct precursor fatty acids needs to be enhanced to approach high yields. Herein, fatty acyl-CoA metabolism ...
An Jieun J Division of Life and Pharmaceutical Sciences, Ewha Womans University, Seoul 120-750, - - 2014
Screening a library of overexpressing mutant alleles of the TATA-binding gene SPT15 yielded two Saccharomyces cerevisiae strains (MRRC 3252 and 3253) with enhanced tolerance to acetic acid. They were also tolerant to propionic acid and hydrogen peroxide. Transcriptome profile analysis identified 58 upregulated genes and 106 downregulated genes in MRRC ...
Wang Wen W Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education of China), National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China. xieqj@hunnu.edu.cn - - 2014
We report a new and efficient protocol for rapid electrodeposition of a gold-Prussian blue ((Au-PB)REd) nanocomposite with ultrahigh electroactivity on an Au electrode by cyclic voltammetry in 0.1 M aqueous K2SO4 containing 1 mM K3Fe(CN)6, 1 mM HAuCl4, and 0.1 mM Fe2(SO4)3, and an electrochemical quartz crystal microbalance and scanning ...
Wu Jingqing J Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University , Beijing 100875, - - 2014
A method was developed for determining free fatty acids in edible plant oils by incorporation of running-buffer-mediated liquid-liquid extraction and polyamidoamine-dendrimer-assisted capillary electrophoresis-capacitively coupled contactless conductivity detection. The recoveries for the extraction were in the range of 90.1% and 110.3%. Addition of dendrimer to the running buffer improved the separation ...
Tang Yongan Y Department of Chemistry and Biochemistry, Miami University, Oxford, OH 45056, USA. - - 2014
Palladium nanorods with controlled lengths from 100 to 500 nm and a fixed width of 20 nm were synthesized for the first time by a seedless approach. These rods show higher peak current densities than Pd cubes for formic acid oxidation and the catalytic activity decreases with increasing rod length.
Thomas Javix J Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2 (Canada), Fax: - - 2014
Rotational spectra of perfluorobutyric acid (PFBA) and its monohydrate were studied with a broadband chirped pulse and a narrow-band cavity based Fourier transform microwave spectrometer, and high-level ab initio calculations. Extensive conformational searches were performed for both the acid and its monohydrate at the MP2/6-311++G(2d,p) level of theory. Two and ...
Zhou Yanli Y Henan Key Laboratory Cultivation Base of Nanobiological Analytical Chemistry, College of Chemistry and Chemical Engineering, Shangqiu Normal Universtiy, Shangqiu 476000, - - 2014
A novel potentiometric approach was described for probing sialic acid (SA) using a poly(anilineboronic acid)/graphene modified glassy carbon (GC) electrode. The proposed electrode was prepared by electrodeposition of reduced graphene oxide (ERGO) at a GC electrode and then coated with a poly(anilineboronic acid) (PABA) film by electropolymerization of its monomer. ...
Qiu Xujian X College of Biological Engineering, Jimei University, Xiamen 361021, China; Engineering Research Center for Aquatic Products Processing of Fujian Province, Jimei University, Xiamen 361021, China; Key Laboratory of Food Microbiology and Enzyme Engineering of Fujian Province, Xiamen 361021, China. Electronic address: - - 2014
The preserving effects of chitosan, chitosan and citric acid, chitosan and licorice extract on fresh Japanese sea bass fillets stored at 4°C for 12days were studied. Results showed that citric acid or licorice extract can enhance the preserving function of chitosan significantly by retarding lipid oxidation and inhibiting microbial growth ...
Chaplin David A DA Chirotech Technology Centre, Dr Reddy's Laboratories EU Ltd., Unit 410 Cambridge Science Park, Milton Road, Cambridge, CB4 0PE, UK. - - 2014
Dehydrocoronamic acid can be racemised by dehydration of an N-acyl derivative to an azlactone, which undergoes facile racemisation. For the N-trifluoroacetyl derivative, the racemisation process was combined with an enzymatic resolution, to achieve a dynamic kinetic resolution process by which the racemate can be converted to either enantiomer.
Peters Christoph C Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, SE-171 21, Solna, - - 2014
The recognition of transmembrane helices by the translocon is primarily guided by the average hydrophobicity of the potential transmembrane helix. However, the exact hydrophobicity of each amino acid can be identified in several different ways. The free energy of transfer for amino acid analogues between a hydrophobic media, e.g. octanol, ...
Liu Ying-Bao YB State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, People's Rep of - - 2014
Over-expression of the gene, mshA, coding for mycothiol glycosyl transferase improved the robustness of Corynebacterium glutamicum to various stresses. Intracellular mycothiol (MSH) content was increased by 114 % in WT(pXMJ19-mshA) compared to WT(pXMJ19). Survival rates increased by 44, 39, 90, 77, 131, 87, 52, 47, 57, 85 and 33 % as compared ...
Aydın Banu B Neonatal Intensive Care Unit, Dr. Sami Ulus Maternity and Children Training and Research Hospital, Ankara, - - 2014
To determine the role of mean platelet volume (MPV) and uric acid levels in the diagnosis of neonatal sepsis (NS). A total of 146 newborns with suspected NS were prospectively included in the study and infants without NS (n = 142) were assigned as controls. The patients were divided into three groups: ...
Kruve Anneli - - 2014
Electrospray ionization (ESI) in the negative ion mode has received less attention in fundamental studies than the positive ion electrospray ionization. In this paper we study the efficiency of negative ion formation in ESI source via deprotonation of substituted phenols and benzoic acids and explore correlations of the obtained ionization ...
Ma Ye Y State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, - - 2014
When the in vitro research works of biosensing begin to mimic in vivo conditions, some certain three-dimensional (3D) structures of biosensors are needed to accommodate biomolecules, bacteria or even cells to resemble the in vivo 3D environment. To meet this end, a novel method of synthesizing CuO nanoflowers on the ...
Neumüller K G KG DSM Biotechnology Center, PO Box 1, 2600 MA Delft, The Netherlands; Laboratory of Food Chemistry, Wageningen University, Bornse Weilanden 9, 6708 WG Wageningen, The - - 2014
Supplementation of a Trichoderma longibrachiatum preparation to an industrial Aspergillus niger/Talaromyces emersonii enzyme mixture demonstrated synergy for the saccharification of corn silage water-unextractable solids (WUS). Sub-fractions of the crude T. longibrachiatum preparation obtained after chromatography were analyzed regarding their hydrolytic activity. An acetyl xylan esterase 1 [Axe1, carbohydrate esterase (CE) ...
Rizzello Carlo Giuseppe CG Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, Bari, - - 2014
This study aimed at investigating the addition of legume (chickpea, lentil and bean) flours to wheat flour bread. Type I sourdough containing legumes or wheat-legume flours were prepared and propagated (back slopped) in laboratory, according to traditional protocols that are routinely used for making typical Italian breads. Based on kinetic ...
King Frank D FD Department of Chemistry, University College London, 20 Gordon Street, London, UK. - - 2014
N-Cinnamoyl-9-aminoanthracenes cyclise with PPA or triflic acid to form novel 2-azahexacyclo[10.6.6.0(1,5).0(6,11).0(13,18).0(19,24)]tetracosa-6(11),7,9,13,15,17,19(24),20,22-nonaen-3-ones. In contrast, both N-cinnamoyl-N-methyl-9-(2-aminomethyl)anthracene and N-cinnamoyl-9-(2-aminoethyl)anthracene undergo an intramolecular Diels-Alder cycloaddition.
Praveenkumar Ramasamy R Biomass and Waste Energy Laboratory, Korea Institute of Energy Research (KIER), Daejeon, 305-343, Republic of - - 2014
Flue gases mainly consist of CO2 that can be utilized to facilitate microalgal culture for bioenergy production. In the present study, to evaluate the feasibility of the utilization of flue gas from a coal-burning power plant, an indigenous and high-CO2-tolerant oleaginous microalga, Chlorella sp. KR-1, was cultivated under mixotrophic conditions, ...
Rohof Wout O WO Department of Gastroenterology & Hepatology, Academic Medical Center, Amsterdam, the - - 2014
The gastric acid pocket is believed to be the reservoir from which acid reflux events originate. Little is known about how changes in position, size, and acidity of the acid pocket contribute to the therapeutic effect of proton pump inhibitors (PPIs) in patients with gastroesophageal reflux disease (GERD). Thirty-six patients ...
Rivas Sandra S Chemical Engineering Department, University of Vigo, Polytechnical Building (Campus Ourense), As Lagoas, 32004 Ourense, Spain; CITI-University of Vigo, Tecnopole, San Cibrao das Viñas, 32901 Ourense, - - 2014
Water soluble compounds were removed from Pinus pinaster wood by a mild aqueous extraction, and the treated wood was subjected to hydrothermal processing to convert most hemicelluloses into soluble saccharides (including low molecular weight polymers, oligomers and monosaccharides). The liquid phase containing hemicellulose-derived saccharides was acidified with sulfuric acid and ...
Zhao Tong T Center for Food Safety, College of Agricultural and Environmental Sciences, The University of Georgia, 1109 Experiment Street, Griffin, Georgia 30223, - - 2014
Studies were done at 21°C to determine the bactericidal activity of lactic acid, levulinic acid, and sodium dodecyl sulfate (SDS) applied individually and in combination on Shiga toxin-producing Escherichia coli (STEC) in pure culture and to compare the efficacy of lactic acid and levulinic acid plus SDS treatments applied by ...
Arora Preeti P Microbial Science Division, Agharkar Research Institute, G.G. Agarkar Road, Pune 411004, - - 2014
A consortium of bacteria growing at 91°C and above (optimally at 96°C) was developed for the recovery of crude oil from declining/depleted oil reservoirs having temperature of more than 91°C. PCR-DGGE-Sequencing analysis of 16S rRNA gene fragments of NJS-4 consortium revealed the presence of four strains identified as members of ...
Zhao Jie J Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, - - 2014
A new generation of triazole-bridged bilayer cyclodextrins (CDs) chiral stationary phase (CSP) material was constructed via a surface-up 'click' approach. The synergistic effect of the tandem-inverted duplex CDs was evidenced by the superior enantioresolution ability toward selected chiral compounds and the enhanced adsorption ability toward hesperetin. The enantioselectivities of dansyl ...
Huang Ya Y Unit for Analytical Probes and Protein Biotechnology, Key Laboratory of Clinical Laboratory Diagnostics of the Education Ministry, College of Laboratory Medicine, Chongqing Medical University, Chongqing, 400016, - - 2014
A new formulation of the bi-reagent kit for serum uric acid assay was developed considering effects of pH on enzyme stability. At 4 °C, half-lives of uricases from Bacillus fastidious and Arthrobacter globiforms were longer than 15 months at pH 9.2, but became shorter at pH below 8.0; half-lives of ...
Yu Liang L Department of Biological Systems Engineering, Washington State University, Pullman, WA 99164, - - 2014
The bioconversion of fiber-based carbohydrates during anaerobic digestion (AD) is impeded due to the recalcitrant nature of the plant cell wall. Pretreatment of lignocellulose materials under mild conditions are needed to improve the digestibility at minimum cost. This study investigated the effects of different pretreatments, including ozone, soaking aqueous ammonia ...
Welz Oliver O Combustion Research Facility, Sandia National Laboratories, Stop 9055, Livermore, CA 94551-0969 - - 2014
Rate coefficients are directly determined for the reactions of the Criegee intermediates (CI) CH2 OO and CH3 CHOO with the two simplest carboxylic acids, formic acid (HCOOH) and acetic acid (CH3 COOH), employing two complementary techniques: multiplexed photoionization mass spectrometry and cavity-enhanced broadband ultraviolet absorption spectroscopy. The measured rate coefficients ...
Ziyatdinova Guzel G Analytical Chemistry Department, A.M. Butlerov Institute of Chemistry, Kazan Federal University, Kremlyevskaya 18, Kazan, Russian Federation. Electronic address: - - 2014
Cognac and brandy components are electrochemically oxidized on multi-walled carbon nanotube modified glassy carbon electrode at 0.44 and 0.59V in 0.1М phosphate buffer solution pH 3.0. Voltammetric behavior of the main antioxidant constituents of cognac (ellagic and gallic acids, syringaldehyde, coniferaldehyde, vanillin, 5-hydroxymethylfurfural and furfural) has been investigated. The peak ...
Ye Yangfang - - 2014
Extreme low salinity influences normal crab growth, morphogenesis, and production. Some individuals of swimming crab Portunus trituberculatus have, however, an inherent ability to adapt to such a salinity fluctuation. Here, we investigated the dynamic metabolite alterations of two P. trituberculatus strains, namely a wild one and a screened (low salinity ...
1 2 3 4 5 6 7 8 9 10 >