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Wang Yuanzhen Y Department of Paper and Bioprocess Engineering, SUNY College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse 13210, NY, - - 2014
(R)-hydroxyalkanoic acids (R-HAs) are valuable building blocks for the synthesis of fine chemicals and biopolymers because of the chiral center and the two active functional groups. Hydroxyalkanoic acids fermentation can revolutionize the polyhydroxyalkanoic acids (PHA) production by increasing efficiency and enhancing product utility. Modifying the fermentation conditions that promotes the ...
Albanese Donatella D Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano (SA), Italy. - - 2014
In winemaking gluconic acid is an important marker for quantitative evaluation of grape infection by Botrytis cinerea. A screen-printed amperometric bienzymatic sensor for the determination of gluconic acid based on gluconate kinase (GK) and 6-phospho-D-gluconate dehydrogenase (6PGDH) coimmobilized onto polyaniline/poly (2-acrylamido-2-methyl-1-propanesulfonic acid; PANI-PAAMPSA) is reported in this study. The conductive ...
Lin Rihui R Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, College of Marine Sciences and Biotechnology, Guangxi University for Nationalities, Nanning, Guangxi 530006, - - 2014
Rosin, an abundant raw material from pine trees, was used as a starting material directly for the synthesis of rosin acid starch. The esterification reaction was catalyzed by lipase (Novozym 435) under mild conditions. Based on single factor experimentation, the optimal esterification conditions were obtained as follows: rosin acid/anhydrous glucose ...
Choi Hyesook H Department of Food Science and Biotechnology, Dongguk - - 2014
Noble blended oils (canola: palm oil = 3:7, 4:6, 5:5, 6:4 and 7:3) were prepared and their frying qualities were evaluated. Frying qualities such as fatty acid composition, acid value, peroxide value, viscosity, smoke point, color, antioxidant activity, and sensory evaluation were measured to elucidate the optimum blend ratio of ...
Jing Pu P Key Lab of Urban Agriculture (South), Research Center for Food Safety and Nutrition, Bor S. Luh Food Safety Research Center, School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai 200240, China. - - 2014
Red radish (Raphanus L.) pickles are popular appetizers or spices in Asian-style cuisine. However, tons of radish brines are generated as wastes from industrial radish pickle production. In this study, we evaluated the dynamic changes in colour properties, phenolics, anthocyanin profiles, phenolic acid composition, flavonoids, and antioxidant properties in radish ...
Voća Sandra S Department of Agricultural Technology, Storage and Transport, Faculty of Agriculture, University of Zagreb, Svetošimunska cesta 25, HR-10000 Zagreb, Croatia. - - 2014
During the harvest season of two consecutive years, five strawberry cultivars ('Arosa', 'Elsanta', 'Marmolada', 'Miss' and 'Raurica'), grown in the continental part of the Republic of Croatia, were examined. Strawberry fruits quality was evaluated by individual phenol compounds, individual anthocyanins and fruit color. Fruits were harvested in three different periods. ...
Ito Yuma Y a Department of Bioinformatic Engineering, Graduate School of Information Science and Technology , Osaka University , Osaka , - - 2014
We performed metabolic engineering on the budding yeast Saccharomyces cerevisiae for enhanced production of succinic acid. Aerobic succinic acid production in S. cerevisiae was achieved by disrupting the SDH1 and SDH2 genes, which encode the catalytic subunits of succinic acid dehydrogenase. Increased succinic acid production was achieved by eliminating the ...
Brito Anghel A Laboratorio de Productos Naturales, Departamento de Química, Facultad de Ciencias Básicas, Universidad de Antofagasta, Av. Coloso S-N, Antofagasta 1240000, Chile. - - 2014
The anthocyanin composition and HPLC fingerprints of six small berries endemic of the VIII region of Chile were investigated using high resolution mass analysis for the first time (HR-ToF-ESI-MS). The antioxidant features of the six endemic species were compared, including a variety of blueberries which is one of the most ...
Lin Xiaoqin X School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, - - 2013
Enhanced biohydrogen production via cascade acid stress on microbial communities, structure patterns of the microbial communities revealed by PLFAs, and the succession of biohydrogen related species against cascade acid stress were all investigated. It was found that hydrogen production could be improved from 48.7 to 79.4mL/gVS after cascade acid stress. ...
Zhang Xin X Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Institute of Analytical Science, Northwest University, Xi'an, Shaanxi 710069, - - 2013
An electrochemical sensor for selective detection of ascorbic acid (AA) in the presence of dopamine (DA) and uric acid (UA) was fabricated by modifying the glassy carbon electrode (GCE) with carbon-supported NiCoO2 (NiCoO2/C) nanoparticles. The electrochemical impedance spectroscopic (EIS) studies reveal the little charge transfer resistance for the modified electrode. ...
Ramírez-Segovia A S AS Centro de Investigación y Desarrollo Tecnológico en Electroquímica S.C., Parque Tecnológico Querétaro s/n, Sanfandila, Pedro Escobedo 76703, Qro, Mexico; Departamento de Química, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, Noria Alta s/n, Guanajuato 36050, Gto, - - 2014
Glassy carbon electrodes (GCE) were sequentially modified by cysteamine-capped gold nanoparticles (AuNp@cysteamine) and PAMAM dendrimers generation 4.5 bearing 128-COOH peripheral groups (GCE/AuNp@cysteamine/PAMAM), in order to explore their capabilities as electrochemical detectors of uric acid (UA) in human serum samples at pH 2. The results showed that concentrations of UA detected ...
Yao Xiaobin X Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, - - 2013
This work is the first demonstration of a simple thiol-ene click chemistry to anchor vinyl imidazolium β-CD onto thiol silica to form a novel cationic native cyclodextrin (CD) chiral stationary phase (CSP). The CSP afforded high enantioseparation ability towards dansyl (Dns) amino acids, carboxylic aryl compounds and flavonoids in chiral ...
Bae Yun Mi YM Department of Biochemistry, Chungnam National University, Daejeon 305-764, Republic of Korea; Laboratory for Advanced Molecular Probing, Research Center for Convergence Nanotechnology, Korea Research Institute of Chemical Technology, Daejeon 305-600, Republic of - - 2013
Peptide nucleic acids (PNAs) are synthetic structural analogues of DNA and RNA. They recognize specific cellular nucleic acid sequences and form stable complexes with complementary DNA or RNA. Here, we designed an oligo-aspartic acid-PNA conjugate and showed its enhanced delivery into cells with high gene correction efficiency using conventional cationic ...
Lu Guang G College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, - - 2013
Pd-multiwalled carbon nanotubes (Pd-MWNTs) catalysts for the conversion of CO2 to organic acids were prepared by the ethylene glycol reduction and fully characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV) technologies. The amorphous Pd particles with ...
Lejardi A A Instituto de Ciencia y Tecnología de Polímeros, CSIC, c/Juan de la Cierva 3, 28006 Madrid, Spain; University of the Basque Country (EHU-UPV), Department of Mining-Metallurgy Engineering and Materials Science, POLYMAT, School of Engineering, Alameda de Urquijo s/n, 48013 Bilbao, - - 2014
Poly(vinyl alcohol) (PVA) has been grafted with glycolic acid (GL), a biodegradable hydroxyl acid to yield modified poly(vinyl alcohol) (PVAGL). The formation of hydrogels at pH=6.8 and physiological temperature through blending chitosan (CS) and PVAGL at different concentrations has been investigated. FTIR, DOSY NMR and oscillatory rheology measurements have been ...
Ng'ong'ola-Manani Tinna A TA Department of Food Science and Technology, Lilongwe University of Agriculture and Natural Resources Bunda College Campus, PO Box 219, Lilongwe, Malawi ; Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences PO Box 5003, Ås, 1430, - - 2014
Fermented pastes of soybeans and soybean-maize blends were evaluated to determine sensory properties driving consumer liking. Pastes composed of 100% soybeans, 90% soybeans and 10% maize, and 75% soybeans and 25% maize were naturally fermented (NFP), and lactic acid bacteria fermented (LFP). Lactic acid bacteria fermentation was achieved through backslopping ...
Toledo Karen - - 2013
Abstract Objective: Obesity is characterized by increased levels of plasma free fatty acids (FFAs) that interfere with insulin signaling. The aim of our study was to assess the FFA profile in obese children and adolescents and to determine their relation with different degrees of insulin resistance. Methods: A transversal study ...
Hung Hsin-Yi HY Natural Products Research Laboratories, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599-7568, USA; Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung 401, - - 2013
Ten new 3,4-seco betulinic acid (BA) derivatives were designed and synthesized. Among them, compounds 7-15 exhibited enhanced chemopreventive ability in an in vitro short-term 12-O-tetradecanoylphorbol-13-acetate (TPA) induced Epstein-Barr virus early antigen (EBV-EA) activation assay in Raji cells. Specifically, analogs with a free C-28 carboxylic acid, including 7, 8, 11, and ...
de Barros Dragana P C DP IBB-Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal; Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal. Electronic address: - - 2013
A new model to obtain fast prediction of partition coefficients in polymer/polymer aqueous two phase systems (ATPSs) is presented, using amino acids as test systems. In particular, the partitioning behavior of eleven amino acids (glycine, alanine, leucine, phenylalanine, lysine, arginine, histidine, aspartic acid, glutamic acid, glutamine and serine) has been ...
Molaakbari Elahe E Department of Chemistry, Shahid Bahonar University of Kerman, P.O. Box 76175-133, Kerman, Iran; Young Researchers Society, Shahid Bahonar University of Kerman, P.O. Box 76175-133, Kerman, - - 2014
In this study, a carbon paste electrode modified with TiO2 nanoparticles and ferrocene monocarboxylic acid (FM) was used to prepare a novel electrochemical sensor. The objective of this novel electrode modification was to seek new electrochemical performances for the detection of methyldopa in the presence of folic acid and glycine. ...
Habib Hosam M HM Department of Nutrition and Health, College of Food and Agriculture, United Arab Emirates University, P.O. Box 15551, Al Ain, United Arab Emirates. Electronic address: - - 2014
This study was conducted to evaluate the quality of 11 honeys from arid regions for first time, and compare it with 5 different honeys from non-arid regions. Mean values obtained for physicochemical parameters were: pH 4.76±0.55; 17.32±1.8% moisture; 80.95±1.60°Brix sugar; 69.05±4.41% total sugar; 413.81±178.48μScm(-1) electrical conductivity; 17.58±7.68meq/kg free acidity; 11.05±3.18meq/kg ...
Meng Xiangtao - - 2013
Cross-metathesis has been shown for the first time to be a useful method for the synthesis of polysaccharide derivatives, focusing herein on preparation of cellulose ω-carboxyalkanoates. Commercially available cellulose esters were first acylated with 10-undecenoyl chloride, providing esters with olefin-terminated side chains. Subsequent cross-metathesis of these terminal olefin moieties with ...
Rogers Catherine M CM School of Pharmacy, Centre for Biomolecular Sciences, The University of Nottingham, University Park, Nottingham, NG7 2RD, - - 2013
Tissue engineering strategies can be applied to enhancing osseous integration of soft tissue grafts during ligament reconstruction. Ligament rupture results in a haemarthrosis, an acute intra-articular bleed rich in osteogenic human mesenchymal stem cells (hMSCS). With the aim of identifying an appropriate biomaterial with which to combine haemarthrosis fluid-derived hMSCs ...
Yuan Xufeng X College of Agronomy and Biotechnology, Center of Biomass Engineering, China Agricultural University, Beijing 100193, - - 2013
The use of biological pretreatment in anaerobic digestion systems has some potential; however, to date, these methods have not been able to effectively increase methane production of lignocellulose of municipal solid waste (LMSW). In this study a thermophilic microbial consortium (MC1) was used as a pretreatment method in order to ...
Chanakul Amornsak A Research Unit of Advanced Ceramics, Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, - - 2014
This contribution presents our continuation work on the color-transition behaviors of polydiacetylene(PDA)/ZnO nanocomposites prepared by using three types of monomers, 5,7-hexadecadiynoic acid (HDDA), 10,12-tricosadiynoic acid (TCDA) and 10,12-pentacosadiynoic acid (PCDA). The color-transition behaviors of these nanocomposites upon exposure to acid and base are investigated by utilizing UV/vis absorption spectroscopy. We ...
Donadio Carlo C University of Pisa, Pisa, Italy, - - 2013
Ultraviolet (UV) absorbance of spent dialysate has been proposed as a method for monitoring hemodialysis efficiency. The contribution of the various uremic toxins to UV absorption, however, needs clarifying. Urea, creatinine and uric acid were measured in blood and dialysate before and during dialysis in 22 maintenance hemodialysis patients. Absorbance ...
Prasad Shishir - - 2013
Infrared-visible sum frequency generation spectroscopy (SFG) was used to measure the interfacial concentrations of poly(methyl methacrylate) (PMMA)/polystyrene (PS) blends next to a sapphire substrate. The acid-base interactions of carbonyl groups of PMMA with the hydroxyl groups on the sapphire drive the interfacial segregation of PMMA next to the sapphire substrate. ...
Ouyang Jianyong - - 2013
New transparent conductive materials are urgently needed for optoelectronic devices. Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) will be a promising next-generation transparent electrode material if its conductivity is comparable to that of indium tin oxide (ITO). To enhance significantly the conductivity of PEDOT:PSS with mild compounds has practical significance. In this work, significant conductivity ...
Wang Zhen - - 2013
Equilibrium acidity (pKa) scales of fifteen substituted benzoic acids in four room temperature ionic liquids (RTIL), BmimOTf, BmimNTf2, BmpyNTf2, and Bm2imNTf2, were established under standard conditions using a modified indicator overlapping method. The effect of homo-hydrogen-bonding on equilibrium acidity was calibrated and the derived pKa's are evidenced to be free ...
Zuo Yingfeng - - 2013
Corn starch and maleic anhydride were synthesized a maleic anhydride esterified starch by dry method. Fourier transform infrared spectroscopy (FTIR) was used for the qualitative analysis of the esterified starches. The reaction efficiency of dry method esterified starch was reached 92.34%. The dry method esterified starch was blended with polylactic ...
Peng Qiang - - 2013
An immunologically active pectin, named LRGP5, was firstly isolated from the fruits of Lycium ruthenicum Murr. It contained rhamnose, arabinose, xylose, galactose and galacturonic acid in the molar ratio of 1.0:2.2:0.5:1.2:4.7. Its molecular weight was estimated to be approximately 1.37×10(5)Da by high performance gel permeation chromatography. The structure was elucidated ...
Giraud William W Laboratoire de Génie chimique, UMR CNRS 5503, 118 route de Narbonne, 31062 CEDEX 9, Toulouse, - - 2013
This study shows that electroanalysis may be used in vanillin biotechnological production. As a matter of fact, vanillin and some molecules implicated in the process like eugenol, ferulic acid, and vanillic acid may be oxidized on electrodes made of different materials (gold, platinum, glassy carbon). By a judicious choice of ...
Blanco Carlos A CA Dpto. Ingeniería Agrícola y Forestal (Tecnología de los Alimentos), E.T.S. Ingenierías Agrarias, 34004 Palencia. Universidad de Valladolid, - - 2013
Iso-α-acids and their chemically modified variants are responsible of the beer bitterness and play a disproportionately large role in the final quality of beer. The current study was undertaken to predict the degradation of commercial lager beers related to changes in the concentration of trans-iso-α-acids during storage by using Liquid ...
Kupiainen-Määttä Oona - - 2013
Quantum chemical calculations have been performed on negatively charged nitric acid - sulfuric acid - dimethylamine clusters. The cluster energies were combined with a kinetic model to study the chemical ionization of sulfuric acid molecules and sulfuric acid - dimethylamine clusters with nitrate ions. Both the sulfuric acid monomer and ...
Rand Amy Ann - - 2013
The biotransformation of fluorotelomer based compounds yields saturated and unsaturated fluorotelomer aldehydes (FTALs and FTUALs, respectively) and carboxylic acids (FTCAs and FTUCAs, respectively) as intermediate metabolites that subsequently transform to perfluorinated carboxylic acids (PFCAs). Previous studies have demonstrated that the FTCAs and FTUCAs are 1 to 5 orders of magnitude ...
Jovanović Vesna B - - 2013
During investigation of the changes of Cys34 thiol group of human serum albumin (HSA) (isolated by affinity chromatography with Cibacron Blue (CB)) in diabetes, we found that HSA-SH content was higher (11-33%) than total serum thiol content. The influence of fatty acids (FA) binding to HSA on this discrepancy was ...
Marangoni Franca F NFI - Nutrition Foundation of Italy, Viale Tunisia 38, 20124 Milano, Italy. Electronic address: - - 2014
The relationship between whole blood fatty acids and myocardial infarction (MI) risk has not been analyzed in detail, especially in Mediterranean countries. The AGE-IM (Acidi Grassi Essenziali e Infarto Miocardico) study was planned to examine the relationships between MI, whole blood fatty acids and the diet in an Italian cohort. ...
Wu Yi-Nan - - 2013
We report the strategy of using the cationic surfactant cetyltrimethylammonium bromide (CTAB) and amino acid l-histidine (His) as co-templates to produce hierarchical ZIF-8 in an aqueous system at room temperature. The hierarchical ZIF-8 had both meso- and microporous structure, resulting in a high mesopore volume as well as specific surface ...
Srivastava Pramod Kumar - - 2013
Acid phosphatase isolated from Vigna aconitifolia seeds was immobilized onto glutaraldehyde activated chitosan beads by crosslinking method. Chitosan beads activated with 2% of glutaraldehyde have demonstrated maximum immobilization yield (∼83%). The immobilized enzyme showed optimum activity at pH 7.0, while soluble form was maximally active in acidic range (pH5.0). With ...
Periche Angela - - 2013
Stevia, a non-caloric natural sweetener with beneficial properties and considerable antioxidants and amino acids, is increasingly consumed as an infusion. This work evaluates the influence of the conditions (temperature: 50, 70 or 90 °C and time: 1, 5, 20 or 40 min) applied to obtain Stevia infusions, on antioxidants (total phenols, flavonoids ...
Jindal Kajal K Department of Physics and Astrophysics, University of Delhi, Delhi 110007, - - 2013
A third generation uric acid biosensor has been developed by exploiting the electrocatalytic functionality of nitrogen (N) doped zinc oxide (ZnO:N) thin film matrix deposited using pulsed laser deposition technique. The electrochemistry of ZnO:N thin film based electrode is investigated by using electrochemical impedance spectroscopy and cyclic voltammetry. The obtained ...
Lee Je-Hyuk JH Department of Food and Nutrition, Kongju National University, Chungnam 340-702, - - 2013
The aim of this study was to develop rice wine (Yakju) containing various amounts and particle sizes of ginseng powder and to analyze the physicochemical characteristics and content of ginsenosides in ginseng-Yakju. Soluble solid content, pH, ethanol concentration, acidity, amino acid content, and evaluation of preference showed no difference between ...
Guirao Miguelina - - 2013
The effect of ethanol in modulating the intensity and duration of the perceived sourness induced by citric acid was studied. Magnitude Estimation-Converging Limits method was applied to rate the sourness of seven solutions (3-70 mM) of citric acid in aqueous solution presented alone and mixed with 8% V/V or 15% ...
Shankar Sini - - 2013
Esterification of lauric acid with n-butanol, catalyzed by immobilized Candida antarctica lipase (CAL) in aqueous-organic biphasic solvent system was studied. Effects of various reaction parameters on esterification were investigated, such as type and amount of solvent, amount of buffer, pH, temperature, speed of agitation, amount of enzyme, butanol and lauric ...
Kokkinidou S - - 2013
Degradation of the mycotoxin patulin between 25 and 85 °C without and with added ascorbic acid was studied, and the effectiveness of linear and nonlinear models for predicting reaction rates was compared. In agreement with previous reports, ascorbic acid significantly increased (P ≤ 0.05) the rate of patulin degradation at all ...
Neumann Wilma - - 2013
Reduction of hydroxy-functionalised carbaboranyl carboxylic acids by organolithium reagents yields the corresponding tertiary alcohols. This is in contrast to exo-polyhedral C-C bond cleavage of unsubstituted carbaboranyl carboxylic acids upon reaction with lithium organyls. The proposed dimeric contact ion pairs may also explain the formation of tertiary alcohols instead of the ...
Lang Roman - - 2013
Quantitative analysis of the bioactives trigonelline (1), N-methylpyridinium (2), caffeine (3) and caffeoyl quinic acids (4) in a large set of roasted Arabica (total sample size n=113) and Robusta coffees (total sample size n=38) revealed that the concentration of 1 and 4 significantly correlated with the roasting color (P<0.001, two ...
Yurttas Zeynep Sevimli - - 2013
This study assessed the application of an antibrowning solution using vacuum impregnation (VI) and then electron-beam irradiation as a means to extend the shelf life of sliced white button mushrooms (Agaricus bisporus). A preliminary study helped to determine the best antibrowning solution and VI process parameters. Mushroom slices were impregnated ...
Ito Ryo - - 2013
Aim: Previous epidemiological studies demonstrated that the ratio of n-6 to n-3 polyunsaturated fatty acids is associated with cardiovascular diseases. We herein investigated whether the beneficial effect of highly purified eicosapentaenoic acid(EPA) on arterial stiffness is associated with changes in the ratio of polyunsaturated fatty acids, such as EPA, docosahexaenoic ...
You Qing-Ping - - 2013
Compounds with strong intramolecular hydrogen bonds (e.g., salicylic acid) have weak intermolecular hydrogen bonding interactions between them and functional monomers in the imprinting process. Consequently, the corresponding molecularly imprinted polymers (MIPs) have no specific adsorption ability. Here, the first magnetic dummy MIPs (MDMIPs) based on benzonic acid as dummy template ...
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