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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 ...
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% ...
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 ...
Cong Yongzheng - - 2013
An isotachophoresis (ITP) separation of eight lanthanides on a serpentine PMMA microchip with a tee junction and a 230 mm long serpentine channel is described. The cover of the PMMA chip is 175 μm thick so that a contactless conductivity detector (C(4) D) in microchip mode can be used to ...
Liu Ping - - 2013
It is found that the plasmon effect of silver nanoparticles (AgNPs) helps to enhance the fluorescence intensity of the quercetin (Qu) and nucleic acids system. Qu exhibited strong fluorescence enhancement when it bound to nucleic acids in the presence of AgNPs. Based on this, a sensitive method for the determination ...
Komy Zanaty R - - 2013
Equilibrium and kinetics of Cu(2+) adsorption onto soil minerals (kaolinite and hematite) in the absence and presence of humic acid have been investigated under various conditions. The influences of ionic strength, pH and solution cations on the rate of the adsorption have been studied. The rate and the amount of ...
Yuan Xian-Zheng - - 2013
In order to facilitate the application of Anaerobic Digestion Model No. 1 (ADM1), an approach for a detailed calculation of stoichiometric coefficients for amino acids acidogenesis during the anaerobic digestion of blue algae is presented. The simulation results obtained support the approach by good predictions of the dynamic behavior of ...
Aladedunye Felix F Max Rubner-Institut (MRI), Federal Research Institute for Nutrition and Food, Department for Safety and Quality of Cereals, Working Group for Lipid Research, Schützenberg 12, D-32756 Detmold, Germany. Electronic address: - - 2014
Recently, we reported the synthesis of a series of dihydrocaffeic acid amides and evaluated their performance as antioxidants for frying applications using a model frying. In the present study, the possibility of a synergy between the amide, N-propyl-N-benzyl-3-(3,4 dihydroxyphenyl)propanamide (DCA) and phosphatidylcholine (PC) was explored in a 6-day actual frying ...
Gou Faliang - - 2013
Two series dyes of azo-bridged zinc porphyrins have been devised, synthesized and performed in dye-sensitized solar cells. In which, salicylic acids and azo groups were introduced as new anchoring group and π-conjugated bridge via simple synthetic procedure. The representation of the new dyes has been investigated by optical, photovoltaic, and ...
Aydoğan Cemil - - 2013
Chiral ligand exchange enantioseparation of aliphatic and aromatic amino acids was successfully performed using a new open-tubular zwitterionic column with tentacle-type polymer stationary phase. The polymeric stationary phase was prepared using 3-chloro-2-hydroxypropyl methacrylate based (HPMA-CI) a new reactive monomer. The preparation procedure of the open-tubular column included silanization, in situ ...
Albertí P P Centro de Investigación y Tecnología Agroalimentaria (CITA), Gobierno de Aragón, Avda. Montañana 930, 50059 Zaragoza, Spain. Electronic address: - - 2013
The effect of varying concentrate composition to include 5% linseed and 200IU of vitamin E on the growth performance, fatty acid composition, and muscle color during shelf life was assessed in 46 young Pirenaica bulls finished to two fatness levels. Adding 5% linseed lowered the dressing rate without altering daily ...
Zanella Alberto - - 2013
Blood acidification by lactic acid infusion converts bicarbonate to CO2. This effect can be exploited to increase the transmembrane PCO2 gradient of an extracorporeal membrane lung, resulting in a significant increase of extracorporeal CO2 removal. Lactic acid, however, is an energetic substrate and its metabolism might increase total body CO2 ...
Sangwallek Juthaporn - - 2013
Yeast fatty acid synthase (Fas) comprises two subunits, α6 and β6, encoded by FAS2 and FAS1, respectively. To determine features of yeast Fas that control fatty acyl chain length, chimeric genes were constructed by combining FAS sequences from Saccharomyces cerevisiae (ScFAS) and Hansenula polymorpha (HpFAS), which mostly produces C16 and ...
Bureau Sylvie - - 2013
The prediction of internal quality properties, such as sweetness and acidity, in peach fruit by mid-infrared spectroscopy is of interest for rapid determination. Attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) was tested here on two populations of peach fruits issued from contrasting genitors providing a large phenotypic variability. Over ...
Yu Xiao-Hong - - 2013
Cyclopropane fatty acids (CPA) are desirable as renewable chemical feedstocks for the production of paints, plastics and lubricants. Towards our goal of creating a CPA-accumulating crop we expressed nine higher-plant cyclopropane synthase (CPS) enzymes in the seeds of fad2fae1 Arabidopsis, and observed accumulation of <1% CPA. Surprisingly, expression of the ...
Segatin Nataša - - 2013
Model vegetable oil mixtures with significantly different basic oil quality indices (free fatty acid, iodine and Totox values) were prepared by adding oleic acids, synthetic saturated triglycerides, or oxidized safflower oil (Carthamus tinctorius) to the oleic type of sunflower oil. Dielectric constants, dielectric loss factors, quality factors, and electrical conductivities ...
Liu Yilan - - 2013
Microbial production of fatty acids and fatty alcohols has attracted increasing concerns because of energy crisis and environmental impact of fossil fuels. Therefore, simple and efficient methods for the extraction and quantification of these compounds become necessary. In this study, a high-performance liquid chromatography-refractive index detection (HPLC-RID) method was developed ...
Qin Xiao-Li XL College of Food Sciences, Southwest University, Chongqing, 400715, People's Republic of China; College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, 510640, People's Republic of - - 2013
T1 lipase has received considerable attention due to its thermostability. Fatty acid specificity of T1 lipase (crude and purified) was investigated, and its potential in the synthesis of acylglycerols was also evaluated. Fatty acid specificity of T1 lipase (crude and purified) was investigated in the esterification of fatty acids (C6:0 ...
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