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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 ...
Malec Marta - - 2014
Red-fleshed apples can be used for the production of innovative products such as Rosé juices and ciders. Phenolic compounds including procyanidins (i.e. condensed tannins) and anthocyanins were quantified in the fruits and the juices of a red-fleshed apple cultivar by chromatography coupled to UV-visible and mass spectrometry. Juice color was ...
Montero-Campillo M Merced MM Departamento de Química, Facultad de Ciencias, Módulo 13, Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid (Spain), Fax: - - 2014
The most stable complexes between squaric acid and its sulfur- and selenium-containing analogues (C4 X4 H2 ; X=O, S, Se) with BeY2 (Y=H, F) were studied by means of the Gaussian 04 (G4) composite ab initio theory. Squaric acid derivatives are predicted to be very strong acids in the gas phase; ...
Kim Hyung Ju HJ Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Dr., Madison, WI 53706 - - 2014
This study demonstrates that an electrochemical dehydrogenation process can be used to oxidize glycerol to glyceraldehyde and glyceric acid even without using stoichiometric chemical oxidants. A glyceric acid selectivity of 87.0 % at 91.8 % glycerol conversion was obtained in an electrocatalytic batch reactor. A continuous-flow electrocatalytic reactor had over an 80 % ...
Brash Alan R AR Vanderbilt University, United - - 2014
In the course of exploring the scope of catalase-related hemoproteins' reactivity towards fatty acid hydroperoxides, we detected a novel candidate in the cyanobacterium Nostoc punctiforme PCC 73102. The immediate neighboring upstream gene, annotated as ″cyclooxygenase-2″, appeared to be a potential fatty acid heme dioxygenase. We cloned both genes and expressed ...
Li Huixiang H Department of Chemistry, Fudan University, Shanghai 200433, PR - - 2014
A multi-walled carbon nanotubes (MWNTs) bridged mesocellular graphene foam (MGF) nanocomposite (MWNTs/MGF) modified glassy carbon electrode was fabricated and successfully used for simultaneous determination of ascorbic acid (AA), dopamine (DA), uric acid (UA) and tryptophan (TRP). Comparing with pure MGF, MWNTs or MWNTs/GS (graphene sheets), MWNTs/MGF displayed higher catalytic activity ...
Que Youxiong Y Key Lab of Sugarcane Biology and Genetic Breeding, Ministry of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China; College of Crop Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China. Electronic address: - - 2014
In this study, a two-stage pH-shift fermentation process was developed for the coproduction of laccase and exopolysaccharides (EPS) by Coriolus versicolor. At the same time, laccase and EPS were purified and characterised in detail. The results showed that the highest laccase and EPS production reached 7680Ul(-1) and 8.2gl(-1). Furthermore, the ...
Berthelmann Arne A Department of Chemistry and Pharmacy, University of Erlangen-Nurnberg, Schuhstr. 19, 91052 Erlangen, Germany. - - 2014
C3-Symmetric trimesic acid scaffolds, functionalized with bromoacetyl, aminooxyacetyl and azidoacetyl moieties, respectively, were synthesized and compared regarding their utility for the trivalent presentation of peptides using three different chemoselective ligation reactions, i.e. thioether and oxime formation, as well as the "click" reaction. The latter ligation method was then used to ...
Mojumder Nazrul - - 2014
A solvothermal method is used to deposit Pt nanoparticles on anodized TiO2 nanotubes (T_NT). Surface characterization using SEM, EDX, and XRD indicates the formation of polycrystalline TiO2 nanotubes of 11010 nm diameter with Pt nanoparticle islands. The application of the T_NT/Pt photoanode has been examined towards simultaneous electrooxidation and photooxidation ...
Lund K E KE UWA Institute of Agriculture (Animal Production) (M085), The University of Western Australia, Crawley, WA, Australia; School of Animal Biology (M085), The University of Western Australia, Crawley, WA, - - 2014
Alpacas have evolved digestive and metabolic adaptations that enable them to survive in environments where the available feed varies in nutritional quality. Alpacas are thought to derive glucose from the deamination of amino acids in the liver, rather than via the conversion of propionate like true ruminants. Because fibre growth ...
Styring Amy K AK Organic Geochemistry Unit, Biogeochemistry Research Centre, School of Chemistry, University of Bristol, Bristol, - - 2014
Amino acid δ(15)N values of barley (Hordeum vulgare) and bread wheat (Triticum aestivum) grains and rachis and broad bean (Vicia faba) and pea (Pisum sativum) seeds, grown in manured and unmanured soil at the experimental farm stations of Rothamsted, UK and Bad Lauchstädt, Germany, were determined by GC-C-IRMS. Manuring was ...
Bodroža-Solarov Marija M Institute of Food Technology, University of Novi Sad, Bul. cara Lazara 1, 21000, Novi Sad, - - 2014
In the present paper, a special method for derivatization of liposoluble extract of common wheat and spelt flours was employed which enables simultaneous detection of fatty acid and non-saponifiable lipid fractions. GC-MS analytical data for both fractions were separately analyzed by multivariate statistical techniques to model classes of different common ...
Ye Fayin F College of Food Science, Southwest University, Chongqing 400715, - - 2014
The adsorptive separation of each steviol glycoside from aqueous solutions by polymeric adsorbents has attracted a lot of interest in recent years. The adsorption properties of chloromethylated cross-linked poly(styrene-co-divinylbenzene) macroporous resins, functionalised with chloromethyl, amino and phenylboronic acid groups, towards rebaudioside A and stevioside were studied. The results revealed that ...
Cai Cuifang C Department of Pharmaceutics, Shenyang Pharmaceutical University , Shenyang , - - 2014
Abstract In the present study, the stability of thymopentin (TP5) in bronchoalveolar lavage fluid (BALF) in presence of potential excipients in inhalation formulation was investigated. The content of TP5 was determined using HPLC method. Commonly used bulking agent, dispersibility enhancers and absorption enhancers in inhalation were investigated with respect to ...
Murphy John Patrick - - 2014
Quantitative metabolomics and proteomics technologies are powerful approaches to explore cellular metabolic regulation. Unfortunately, combining the two technologies typically requires different LC-MS setups for sensitive measurement of metabolites and peptides. One approach to enhance the analysis of certain classes of metabolites is by derivatization with various types of tags to ...
Meng Yanhong - - 2014
In the application of traditional bulk heterojunction polymer solar cells, to prevent the etching of ITO by the acidic poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and thereby improve the device stability, pH-neutral PEDOT:PSS is introduced as the hole transport layer (HTL). After treating the neutral PEDOT:PSS with UV-ozone and with an oxygen plasma, the ...
Faghihi Homa H Department of Pharmaceutics, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, - - 2014
This study investigated the effect of various amino acids on the molecular and thermodynamic stability of IgG (immune globulin G) as well as its aerosol performance. The antibody was spray-dried in the presence of different amino acids (leucine, phenylalanine, cysteine, glycine, lysine and arginine) using 20% and 50% (w/w) amino ...
de Oliveira Mendes Gilberto G Departamento de Microbiologia, Universidade Federal de Viçosa, - - 2014
During fungal rock phosphate (RP) solubilization, a significant quantity of fluoride (F(-)) is released together with phosphorus (P), strongly inhibiting the process. In the present work, the effect of two F(-) adsorbents (activated alumina (Al2O3) and biochar) on RP solubilization by Aspergillus niger was studied. Al2O3 adsorbed part of the ...
Gillams Richard James - - 2014
The addition of saturated fatty acids (FA) to phosphatidylcholine lipids (PC) that have saturated acyl chains has been shown to promote the formation of lyotropic liquid crystalline phases with negative mean curvature. PC/FA mixtures may exhibit inverse bicontinuous cubic phases (Im3m, Pn3m) or inverse topology hexagonal phases (HII), depending on ...
Yen Hong-Wei HW Department of Chemical and Materials Engineering, Tunghai University, Taichung 407, Taiwan. Electronic address: - - 2014
In the simultaneous biological production of 1,3-propanediols (PDO) and 2,3-butanediols (BDO), glycerol was suggested to be a suitable carbon source. Extra addition of 10g/L of lactic acid can create about a 30% increase in total diols production compared to the control batch. Several different pH control strategies were investigated. The ...
Ojewole Elizabeth E Discipline of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal , Durban, KwaZulu-Natal , South Africa - - 2014
Abstract The aim of this study was to explore the potential of novel oleic acid (OA) derivatives as buccal permeation enhancers for the delivery of didanosine (ddI). The OA derivatives, i.e. ester derivative (OA1E), the dicarboxylic acid derivative (OA1A) and the bicephalous dianionic surfactant (OA1ANa) were synthesized and their effects ...
Cui Yan Y School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China; Shandong Luoxin Pharmaceutical Co., Ltd., Linyi 276017, - - 2014
A simple, efficient and general HPLC method for the determination of enantiomeric purity of a series of (l)-amino acids was developed. In order to improve the detection sensitivity, pre-column derivatization was adopted and 7-chloro-4-nitrobenzoxadiazole (NBD-Cl) was selected as derivatization reagent. NBD-amino acid enantiomers were then enantioseparated on a Pirkle-type chiral ...
Ma Cuiping C State Key Laboratory Base of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China. - - 2014
A new isothermal and cascade signal amplification method for sensitive nucleic acid detection was developed, which is ultra-simple because it only depends on one double-nicked beacon.
Zhang Liying L School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, - - 2014
Trace penicilloic acid allergen frequently leads to various fatal immune responses to many patients, but it is still a challenge to directly discriminate and detect its residue in penicillin by a chemosensing way. Here, we report that silver-coated gold nanoparticles (Au@Ag NPs) exhibit a structure-selective hot-spot Raman enhancement capability for ...
Ahmad A L - - 2014
In this work, a mixture of chloroform and methanol (1:1, v/v) was applied to oil extraction from Chlorella sp. at 30, 40, 50 and 60 degrees C for 150 min extraction times. Kinetic studies revealed that the values of n and the rate constants were found to depend strongly on ...
Wu Di D College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China. Electronic address: - - 2014
Developing rapid methods for measuring long-chain ω-3 (n-3) poly-unsaturated fatty acid (LCPUFA) contents has been a crucial request from the algal oil industry. In this study, four spectroscopy techniques, namely visible and short-wave near infra-red (Vis-SNIR), long-wave near infra-red (LNIR), mid-infra-red (MIR) and nuclear magnetic resonance (NMR) spectroscopy, were exploited ...
Hussein S Z SZ Department of Biochemistry, Faculty of Medicine; University Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, - - 2014
Honey is a supersaturated solution of sugars, enriched with proteins, minerals, vitamins, organic acids and polyphenols. Gamma irradiation is a physical technique of food preservation which protects the honey from insects' and microbial contamination during storage. We investigated the effect of gamma irradiation on physicochemical properties in two types of ...
Mathiyalagan Ramya R a Graduate School of Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University , Yongin , Republic of - - 2014
The ginsenosides in Panax ginseng have vast structural and pharmacological efficacies. We covalently conjugated polyethylene glycol on the surface of CK (PEG-CK) through an acid-labile ester-linkage that showed increased solubility of CK. HPLC analysis showed that the release of CK was enhanced at acidic pH 5, whereas it was dramatically ...
Masoud M S MS Faculty of Science, Chemistry Department, Alexandria University, Alexandria, - - 2014
The reaction of (99m)Tc pertechnetate with 5,5'-diethyl barbituric acid, adenine, d-glucose and thiobarbituric acid at different temperatures was studied. The solvent effect on the electronic absorption spectra of the reactions was recorded. The reaction mixtures have been analyzed at different times using TLC and a radiodetctor to show the peaks ...
Chi Maoqiang M Alan G. MacDiarmid Institute, College of Chemistry, Jilin University, Changchun 130012, PR - - 2014
A novel poly(amic acid) with pendant aniline tetramer and sulfonic acid groups (ESPAA) was synthesized by ternary polymerization and characterized by Fourier-transform infrared spectra, ((1))H NMR and gel permeation chromatography. The polymer showed good thermal stability and excellent solubility in the common organic solvents. The electrochemical properties were investigated carefully ...
Oguri Masashi M Analytical Science Research Laboratories, Kao Corporation, Akabane 2606, Ichikai, Haga, Tochigi 321-3497, Japan; Leiden/Amsterdam Center for Drug Research, Department of Drug Delivery Technology, Leiden University, Einsteinweg 55, 2333 CC Leiden, the - - 2014
The stratum corneum (SC) plays a fundamental role in the barrier function of skin. The SC consists of corneocytes embedded in a lipid matrix. The main lipid classes in the lipid matrix are ceramides (CERs), cholesterol (CHOL) and free fatty acids (FFAs). The aim of this study was to examine ...
Liu Xiaofang X Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR - - 2014
In the present work, a novel strategy based on overoxidized polyimidazole (PImox) and graphene oxide (GO) copolymer modified electrode was proposed for the simultaneous determination of ascorbic acid (AA), dopamine (DA), uric acid (UA), guanine (G) and adenine (A). The copolymer was characterized by the scanning electron microscopy (SEM), atomic ...
Jo Ara A Department of Chemistry & Nano Science, Ewha Womans University, Seoul 120-750, Republic of - - 2014
We report a new nonenzymatic amperometric detection of ascorbic acid (AA) using a glassy carbon (GC) disk electrode modified with hollow gold/ruthenium (hAu-Ru) nanoshells, which exhibited decent sensing characteristics. The hAu-Ru nanoshells were prepared by the incorporation of Ru on hollow gold (hAu) nanoshells from Co nanoparticle templates, which enabled ...
Wang Zhi-Li ZL Key Laboratory of Automobile Materials, Ministry of Education, Department of Materials Science and Engineering, Jilin University, Changchun 130022, China. - - 2014
AuPd-CeO2 nanocomposites directly nucleated and grown on nitrogen-doped reduced graphene oxide, exhibit excellent catalytic activity and 100% hydrogen selectivity toward formic acid decomposition for hydrogen generation without any additives at room temperature.
Golbahar J J Department of Molecular Medicine, College of Medicine and Medical Sciences, AGU, Manama, Kingdom of Bahrain / Diagnostic Services, Biochemical Genetic Unit, Princess Al-Jawhara Centre for Genetic Diagnosis and Research, Manama, Kingdom of - - 2014
Tandem mass spectrometry is increasingly used in the Middle East in newborn screening for inborn errors of metabolism using dried blood spots. The sensitivity and specificity of this system for analyzing fatty and amino acids, screening for more than 40 metabolic conditions, is known. However, the short term stability of ...
Boddu Sai H S SH Department of Pharmacy Practice, College of Pharmacy and Pharmaceutical Sciences, The University of Toledo , Toledo, OH , - - 2014
Abstract Objective: This study deals with the preparation and evaluation of a pluronic lecithin organogel (PLO gel) containing ricinoleic acid for the transdermal eyelid delivery of dexamethasone and tobramycin. Methods: Five different PLO gel formulations (F1, F2, F3, F4 and F5) containing tobramycin (0.3%) and dexamethasone (0.1%) were prepared and ...
Demma Carà Piera P Istituto per lo Studio dei Materiali Nanostrutturati, CNR via U. La Malfa 153, 90146 Palermo (Italy); Dipartimento Sistemi Agro-Ambientali, Università degli Studi di Palermo viale delle Science, 90128 Palermo - - 2014
We study the catalytic condensation of furfuryl alcohol with 1-butanol to butyl levulinate. A screening of several commercial and as-synthesized solid acid catalysts shows that propylsulfonic acid-functionalized mesoporous silica outperforms the state-of-the-art phosphotungstate acid catalysts. The catalyst is prepared via template-assisted sol-gel polycondensation of TEOS and MPTMS. It gives 96 % ...
Hu Shuang-Lan - - 2014
A new sucralose-derived solid acid catalyst (SUCRA-SO3H), containing -Cl and -SO3H functional groups has been shown to be highly effective for hydrolyzing β-1,4-glucans, completely hydrolyzing cellobiose (1) into glucose (2) in 3 hours and converting the microcrystalline cellulose pretreated by the ionic liquid into glucose (2) with a yield of ...
Sharma Gaurav G Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, - - 2014
The present study reports the simultaneous analysis of 26 physiological amino acids in plasma along with total cysteine and homocysteine by high-performance liquid chromatography (HPLC) employing 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate (AQC) as precolumn derivatizing reagent. Separations were carried out using Lichrospher 100 RP-18e (5 μm) 250 × 4.0 mm column connected to 100 CN 4.0 × 4.0 mm guard ...
Wang Jun J School of Biology and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212018, PR China; School of the Environment, Jiangsu University, Zhenjiang 212013, PR China. Electronic address: - - 2014
Caffeic acid phenethyl ester (CAPE) is a rare natural ingredient with several biological activity, but the industrial production of CAPE using lipase-catalyzed esterification of caffeic acid (CA) and 2-phenylethanol (PE) in ionic liquids is hindered by low substrate concentrations and a long reaction time. To establish a high-efficiency bioprocess for ...
Rodriguez Mary Ana Petersen MA University of São Paulo, PO Box 9, CEP 13418-900 Piracicaba, SP, - - 2014
Considering the milk fatty acid influence on human health, the aim of this study was to compare gas chromatography (GC) and Fourier transform infrared (FTIR) spectroscopy for the determination of these compounds. Fatty acid content (g/100g of fat) were obtained by both methods and compared through Pearson's correlation, linear Bayesian ...
Aguilar-Galvez Ana A Instituto de Biotecnología (IBT), Universidad Nacional Agraria La Molina (UNALM), Av. La Molina s/n, Lima, - - 2014
Gallotannins obtained from tara pod extracts (EE) and from the products of acid hydrolysis for 4 and 9h (HE-4 and HE-9) were characterised for their composition, antioxidant activity, antimicrobial activity (AA) and minimum inhibitory concentration (MIC). Results of AA and MIC showed that EE exerted the highest inhibitory activity against ...
Fukuyama Yuko Y Koichi Tanaka Laboratory of Advanced Science and Technology, Shimadzu Corporation , 1, Nishinokyo-Kuwabaracho, Nakagyo-ku, Kyoto 604-8511, - - 2014
Glycosylation and phosphorylation are important post-translational modifications in biological processes and biomarker research. The difficulty in analyzing these modifications is mainly their low abundance and dissociation of labile regions such as sialic acids or phosphate groups. One solution in matrix-assisted laser desorption/ionization (MALDI) mass spectrometry is to improve matrices for ...
Tao Yongxin - - 2014
Poly(L-glutamic acid)/beta-cyclodextrin (P-L-Glu/β-CD) modified glassy carbon electrode (GCE) was prepared by electrochemical polymerization of L-glutamic acid on GCE and subsequent self-assembly of β-CD onto the obtained P-L-Glu. Electrochemical recognition of tryptophan (Trp) enantiomers with the P-L-Glu/β-CD was investigated by differential pulse voltammetry (DPV), and the results show that Trp enantiomers ...
Han Jin J 302 Military Hospital of China, Beijing 100039, - - 2014
The anti-bacterial activities of three types of di-O-caffeoylquinic acids (diCQAs) in Lonicera japonica flowers, a traditional Chinese medicine (TCM), on Bacillus shigae growth were investigated and compared by microcalorimetry. The three types of diCQAs were 3, 4-di-O-caffeoylquinic acid (3, 4-diCQA), 3, 5-di-O-caffeoylquinic acid (3, 5-diCQA), and 4, 5-di-O-caffeoylquinic acid (4, ...
Zhao Peng P Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Kunming 650500, China; College of Life Sciences and Biotechnology, Kunming University of Science and Technology, Kunming 650500, - - 2014
To improve lipid productivity, co-cultivation of Chlorella sp. U4341 and Monoraphidium sp. FXY-10 for lipid production was studied. Compared with mono-cultivations, co-cultivation of the two microalgae significantly increased the accumulation of total biomass and total lipid yield, and enhanced the lipid productivity (29.52 mg L(-1) d(-1)). Fatty acid compositions significantly varied in different ...
Mai Van Chung VC Department of Plant Physiology, Poznań University of Life Sciences, Wołyńska 35, 60-637 Poznań, Poland; Department of Plant Physiology, Vinh University, Le Duan 182, Vinh City, Viet - - 2014
This study demonstrates the sequence of enhanced generation of signal molecules such as phytohormones, i.e. jasmonic acid (JA), ethylene (ET), salicylic acid (SA), and a relatively stable free radical, nitric oxide (NO), in response of Pisum sativum L. cv. Cysterski seedling leaves to the infestation of pea aphid Acyrthosiphon pisum ...
Yang Yu Jun YJ School of Chemistry and Chemical Engineering, Xuchang University, Xuchang, Henan 461000, China. Electronic address: - - 2014
We have developed hexadecyl trimethyl ammonium bromide (CTAB) functionalized graphene oxide (GO)/multiwalled carbon nanotubes (MWNTs) modified glassy carbon electrode (CTAB-GO/MWNT) as a novel system for the simultaneous determination of dopamine (DA), ascorbic acid (AA), uric acid (UA) and nitrite (NO2(-)). The combination of graphene oxide and MWNTs endow the biosensor ...
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