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Results 601 - 650 of 2881
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McNamara Robert K - - 2013
Deficiency in long-chain omega-3 (LCn - 3) fatty acids, eicosapentaenoic acid (EPA, 20:5n - 3) and docosahexaenoic acid (DHA, 22:6n - 3), has been implicated in the pathoetiology of cardiovascular disease, a primary cause of excess premature mortality in patients with schizophrenia (SZ). In the present study, we determined erythrocyte ...
Teh Huey Fang - - 2013
To better understand lipid biosynthesis in oil palm mesocarp, in particular the differences in gene regulation leading to and including de novo fatty acid biosynthesis, a multi-platform metabolomics technology was used to profile mesocarp metabolites during six critical stages of fruit development in comparatively high- and low-yielding oil palm populations. ...
Khan Mahejibin - - 2013
A soil metagenomic library was constructed and two functionally diverse lipase genes, SMlipB and SMlipD, were screened by a function-driven approach and characterized. The optimal temperature for enzyme activity of SMlipB and SMlipD was 50°C and 30°C, respectively, and optimal pH was determined to be 7.0 and 9.0, respectively. Both ...
Gruczynska Eliza - - 2013
A mixture of lard and rapeseed oil (1:1, wt/wt) was interesterified using immobilized lipases from Rhizomucor miehei (Lipozyme RM IM) and Candida antarctica (Novozym 435) as catalysts. Enzymatic interesterifications were carried out at 60°C for 8 h with Lipozyme RM IM or at 80°C for 4 h with Novozym 435. ...
Pereira Vanda - - 2013
Polyphenols, antioxidant potential and color of three types of fortified Madeira wines were evaluated during the accelerated ageing, named as estufagem. The traditional estufagem process was set to 45 °C for 3 months. Overheating conditions, 1 month at 70 °C, were also examined. Total polyphenols (TP), total monomeric anthocyanins (TMA) ...
Savikin Katarina P - - 2013
Currant seeds, a by-product of juice production, are recognized as a valuable source of oil rich in polyunsaturated fatty acids. We have evaluated 28 currant varieties for their oil content and fatty-acid composition. The oil content in the seeds ranged from 18.2-27.7%, and no statistical difference between varieties of different ...
Akasaka Kazuaki - - 2013
The L-ascorbic acid concentration in beverages was measured after separation by silica gel thin layer chromatography (TLC) by visually determining the time in autocatalytic reaction for the L-ascorbic acid spot to turn the same yellow color of the background and disappear (the end time of the induction period) after spraying ...
Takayanagi Toshio - - 2013
An acid dissociation constant of tetrabromophenolphthalein ethyl ester (TBPE) was determined through the measurement of electrophoretic mobility by capillary zone electrophoresis (CZE). Although TBPE is degradable in acidic pH region and it gradually degraded at pH conditions around and below its pKa values in the time scale of the CZE ...
Müller Manuel M - - 2013
The contemporary proteinogenic repertoire contains 20 amino acids with diverse functional groups and side chain geometries. Primordial proteins, in contrast, were presumably constructed from a subset of these building blocks. Subsequent expansion of the proteinogenic alphabet would have enhanced their capabilities, fostering the metabolic prowess and organismal fitness of early ...
Liu Zhi-Qiang - - 2013
In this study, several nitrilase genes from phylogenetically distinct organisms were expressed and purified in E. coli in order to study their ability to mediate the biotransformation of nitriles. We identified three nitrilases: Acidovorax facilis nitrilase (AcN); Alcaligenes fecalis nitrilase (AkN); and Rhodococcus rhodochrous nitrilase (RkN), which catalyzed iminodiacetonitrile (IDAN) ...
Yamazawa Akira - - 2013
Anaerobic digestion of biomacromolecules in various microbial ecosystems is influenced by the variations in types, qualities, and quantities of chemical components. Nuclear magnetic resonance (NMR) spectroscopy is a powerful tool for characterizing the degradation of solids to gases in anaerobic digestion processes. Here we describe a characterization strategy using NMR ...
Shukla S P - - 2013
Successful adaptation/acclimatization to low temperatures in micro-algae is usually connected with production of specific biotechnologically important compounds. In this study, we evaluated the growth characteristics in a micro-scale mass cultivation of the Antarctic soil green alga Chlorella mirabilis under different nitrogen and carbon sources followed by analyses of fatty acid ...
Steen Andrew D - - 2013
The ratios of d- versus l-amino acids can be used to infer the sources and composition of sedimentary organic matter. Such inferences, however, rely on knowing the rates at which amino acids in sedimentary organic matter racemize abiotically between the d- and the l-forms. Based on a heating experiment, we ...
Przybylski Roman - - 2013
Canola and soybean oils both regular and with modified fatty acid compositions by genetic modifications and hydrogenation were compared for frying performance. The frying was conducted at 185 ± 5 °C for up to 12 days where French fries, battered chicken and fish sticks were fried in succession. Modified canola oils, with reduced levels ...
Nair K Lekha - - 2013
The aim of this study is to test the hypothesis that the newly synthesized poly(δ-valerolactone)/poly(ethylene glycol)/poly(δ-valerolactone) (VEV) copolymer grafted with folic acid would impart targetability and further enhance the anti-tumor efficacy of doxorubicin (DOX). Here, folic acid conjugated VEV (VEV-FOL) was synthesized by a modified esterification method and characterized using ...
Kaya Ibrahim - - 2013
The purpose of this study was to investigate the local antibacterial efficacy of saline, rifampicin, gentamicin, high-concentration fusidic acid and low-concentration fusidic acid in the decontamination of allografts contaminated with Staphylococcus aureus. Fifty-five sterile, fresh-frozen femoral heads obtained from the bone bank were contaminated with methicillin-sensitive ATCC 25923 Staphylococcus aureus. ...
Kuwabara Tetsuo - - 2013
A modified β-cyclodextrin (1) tethered with a phenylaminoazobenzen moiety has been synthesized for the purpose of developing a new guest-responsive color-change chemosensor. When the solution became acidic, 1 changed color from yellow to purple due to a structural change of the dye moiety from the azo form to the azonium ...
Idrees Muhammad - - 2013
Potential of sodium sulfide and sodium sulfite, in the presence of sodium hydroxide was investigated to pretreat the corncob (CC), bagasse (BG), water hyacinth and rice husk (RH) for maximum digestibility. Response Surface Methodology was employed for the optimization of pretreatment factors such as temperature, time and concentration of Na2S ...
Miao Jianyin - - 2013
A novel continuous subcritical n-butane extraction technique for Camellia seed oil was explored. The fatty acid composition, physicochemical properties, and benzo[a]pyrene content of Camellia seed oil extracted using this subcritical technique were analyzed. Orthogonal experiment design (L9(3(4))) was adopted to optimize extraction conditions. At a temperature of 45 °C, a pressure ...
Odo Junichi - - 2013
An iron(III) complex of thiacalix[4]arenetetrasulfonate attached to an anion-exchanger (Fe(3+)-TCASA-500) showed high peroxidase-like catalytic activity at pH 5 - 8 for the formation of quinoid dye, following the color reaction between 3-methyl-2-benzothiazolinone hydrazone (MBTH) and N-ethyl-N-(3-sulfopropyl)aniline (ALPS) in the presence of H2O2. This catalytic activity of Fe(3+)-TCASA-500 for the MBTH-ALPS ...
Tanaka Yuuki - - 2013
The complete hydrolysis of konjac glucomannan (KGM) with an acid or enzyme generally takes a long time. To accelerate KGM hydrolysis without diminishing the conventional quality, a diluted acid hydrolysis of KGM with sulfuric acid was conducted using a microwave digestion system. The optimum conditions of microwave-assisted acid hydrolysis for ...
Tee-Ngam Prinjaporn - - 2013
Ferulic acid is an important phenolic antioxidant found in or added to diet supplements, beverages, and cosmetic creams. Two designs of paper-based platforms for the fast, simple and inexpensive evaluation of ferulic acid contents in food and pharmaceutical cosmetics were evaluated. The first, a paper-based electrochemical device, was developed for ...
Fritea Luminţa - - 2013
The electrochemical behavior of ascorbic acid and uric acid on glassy carbon bare electrodes and ones modified with β-cyclodextrin entrapped in polyethyleneimine film has been investigated using square wave voltammetry. The electrode modification was achieved in order to separate the voltammetric peaks of ascorbic acid and uric acid when present ...
Salimon Jumat J School of Chemical Sciences & Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi Selangor, - - 2013
Biolubricant base oils, 9,12-hydroxy-10,13-oleioxy-12-octadecanoic acid (HYOOA) was synthesized based on the esterification reaction of Monoepoxide linoleic acid 9(12)-10(13)-monoepoxy 12(9)-octadecanoic acid (MEOA) with oleic acid (OA) and catalyzed by p-Toluenesulfonic acid. The optimum conditions for the experiment using D-optimal design to obtain high yield% of 84.61, conversion% of 83.54 and lowest ...
Arman Hadi D HD Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249-0698, - - 2013
The asymmetric unit of the title co-crystal, C10H6O8·2C8H10N4O2, comprises a centrosymmetric benzene-1,2,4,5-tetra-carb-oxy-lic acid (LH4) mol-ecule and a mol-ecule of caffeine in a general position. LH4 is nonplanar, with the dihedral angles between the ring and pendent carb-oxy-lic acid groups being 44.22 (7) and 49.74 (7)°. By contrast, the caffeine mol-ecule is planar ...
Queiroz Daher Antonio DA Professor, Department of Dentistry, University of Vila Velha, Vila Velha, Espírito Santo, - - 2013
Dental impressions disinfection is important to reduce the risk of cross contamination but this process may produce dimensional distortions. Peracetic acid is a disinfectant agent with several favorable characteristics yet underutilized in Dentistry. The aim of this paper is to compare the dimensional stability of casts obtained from addition silicone ...
Zhang Rui - - 2012
Purification of nucleic acids from low quantity of bacterial cells in minute volume is im- portant in many clinical and biological applications. We developed a novel microfluidic liquid phase nucleic acid purification chip to selectively isolate DNA or RNA from bacterial cell in the range of 5000 down to a ...
Weimer P J - - 2012
Megasphaera elsdenii T81 grew on either DL-lactate or D-glucose at similar rates (0.85 h(-1)) but displayed major differences in the fermentation of these substrates. Lactate was fermented at up to 210-mM concentration to yield acetic, propionic, butyric, and valeric acids. The bacterium was able to grow at much higher concentrations of ...
Nuin Edurne - - 2012
New photoactive dyads have been synthesized by derivatization of cholic acid (CA) or cholesterol (Ch). These compounds have proven to be efficient tools to monitor incorporation of CA and Ch to mixed micelles (MM) and to probe the microenvironment experienced inside these entities. The outstanding capability of MM to solubilize ...
El-Sheekh Mostafa - - 2012
Nowadays, microalgae are discussed as a promising feedstock for biodiesel production. The present study examines the possibility of enhancement of fatty acid productivity of Scenedesmus obliquus by modifications of the culture medium composition. The effect of different concentrations of sodium bicarbonate, salinity, potassium nitrate, glycerol and sugarcane molasses on the ...
Zhang Ning - - 2012
Physical modification of polysaccharides exerted better biological properties because of the change of physicochemical properties. Polysaccharides from Inonotus obliquus (IOPS) were modified by acid, alkali hydrolysis, thermal and ultrasonic treatment in this study. The physicochemical and antioxidant properties of IOPS and its physical modified products were comparatively investigated by chemical ...
Yamaguchi Masaru - - 2012
Arterial cord blood (CB) acid-base status and gas values, such as pH, PCO(2), PO(2), HCO(3)(-) and base excess, provide useful information on the fetal and neonatal condition. However, it remains unknown whether these values affect the radiosensitivity of fetal/neonatal hematopoiesis. The present study evaluated the relationship between arterial CB acid-base ...
Yang Dan - - 2013
The desired mix of alpha-linolenic acid (ALA)-enriched structured lipid (SL) and physically blended lipid (PB) was prepared from grape seed oil and perilla oil at a weight ratio of 3:1. The major triacylglycerol species (LnLnL) in PB was drastically increased after interesterification (SL), from 0.5% to 16.8%. After the reaction, ...
Shin Jung-Ah - - 2013
Modified butterfats (MBFs) were produced by lipase-catalyzed interesterification with 2 substrate blends (6:6:8 and 4:6:10, by weight) of anhydrous butterfat (ABF), palm stearin, and flaxseed oil in a stirred-batch type reactor after short path distillation. The 6:6:8 and 4:6:10 MBF contained 21.7% and 26.5%α-linolenic acid, respectively. Total saturated fatty acids ...
Prasad Laxmi N - - 2012
  This study examined the influence of galactooligosaccharides (GOS) and modified waxy maize starch (MWMS) addition on the growth of starter cultures, and syneresis and firmness of low-fat yogurt during storage for 28 d at 4 °C. The control yogurt (CY) was prepared without any prebiotics. Incorporation of 2.0% (w/v) ...
Syngiridis Kostas - - 2012
The production of volatile fatty acids (VFAs) in a continuous process using a synthetic glucose medium as model substrate in the presence of γ-alumina as promoter is described. The results showed formation of acetic, propionic, isobutyric, butyric, isovaleric and valeric acids, with acetic acid being more than 90% of the ...
Yan Yunjun - - 2012
An immobilization strategy was employed to improve activity and operational stability of Yarrowia lipolytica lipase LIP2 (YlLIP2) by using macroporous resins as carrier. D152H, a cation-exchange resin, was the best support. Under the optimized conditions, the immobilization efficiency was 89.81% and the specific activity was 809,751U/g, being 2.1-fold higher than ...
Lee Yoosung - - 2013
Chlorophyll photosensitized oxidation of W/O emulsion consisting of oils with different fatty acid composition was studied and β-carotene effects on the singlet oxygen oxidation affected by phosphatidylcholine were evaluated by determining peroxide value (PV) and conjugated dienoic acid (CDA) contents. An emulsion was composed of purified oil (sunflower, soybean, canola, ...
Zhu Saijie S The University of Texas at Austin, College of Pharmacy, Pharmaceutics Division, Austin, TX 78712, United - - 2013
Chemoresistance is a major issue for most gemcitabine-related chemotherapies. The overexpression of ribonucleotide reductase subunit M1 (RRM1) plays a key role in gemcitabine resistance. In this study, we synthesized a new highly acid-sensitive amphiphilic micelle material by conjugating hydrophilic polyethylene glycol with a hydrophobic stearic acid derivative (C18) using a ...
Michaelides Adonis - - 2012
Three 2D and 3D photoreactive MOFs of trans,trans-muconic acid with Er(3+) and their corresponding isomorphous Y(3+) phases were synthesized and their photoreactivity was studied as a function of the crystal environment.
Roach Jim D - - 2012
Haloacetic acids, formed in drinking water during disinfection by chlorination, pose significant risks to human health. Semiequilibrium dialysis and ultrafiltration experiments were used to examine the partitioning of the five regulated haloacetic acids (HAA(5)) viz. chloro-, dichloro-, trichloro-, bromo-, and dibromoacetic acids into cetylpyridinium chloride (CPC) micelles across a range ...
Xi Zhi-Guo - - 2012
We described herein a viable binary acid strategy for the catalytic Nazarov reaction of aryl vinyl ketones. Simply combining a Lewis acid and a Bronsted acid led to a dramatic enhancement of the catalytic activity in the Nazarov reaction of aryl vinyl beta-ketoesters. The obtained optimal binary acid catalyst In(OTf)3/diphenyl ...
Xue Pengchong - - 2012
A glutamide gelator, 1, was synthesized, and a weak emission enhancement was observed during its gelation. In addition, 1 could be an excellent scaffold for successfully embedding an energy acceptor, 2, into its aggregate to obtain highly efficient energy transfer. An amplification of the emission enhancement was observed in the ...
Lim Hyungsuk - - 2012
Efficient delivery of small interfering RNA (siRNA) is one of major challenges in the successful applications of siRNA in clinic. In the present study, we report a new acid-degradable poly(ketal amidoamine) (PKAA) as a siRNA carrier, which has high delivery efficiency and low cytotoxicity. PKAA was designed to have acid-cleavable ...
Xiao Qing - - 2013
A method has been developed to improve the performance of alternating-current electrolyte atmospheric liquid discharge (ac-EALD) optical emission spectrometry for the determination of elements. Significant enhancement of emission intensity was achieved by adding organic substance into the nitric acid electrolyte solutions. Under the optimized conditions, 3% (v/v) formic acid in ...
Magnusson Martin M Department of Cardiology, Skåne University Hospital, Entrance 35, Floor 2, SE 205 02 Malmö, Sweden. - - 2013
We recently identified a metabolic signature of three amino acids (tyrosine, phenylalanine, and isoleucine) that strongly predicts diabetes development. As novel modifiable targets for intervention are needed to meet the expected increase of cardiovascular disease (CVD) caused by the diabetes epidemic, we investigated whether this diabetes-predictive amino acid score (DM-AA ...
Lata Suman - - 2012
A method is described for construction of a highly sensitive amperometric L-amino acid biosensor based on covalent immobilization of goat kidney L- amino acid oxidase (LAAO) onto carboxylated multiwalled carbon nanotubes/nickel hexacyanoferrate/polypyrrole hybrid film electrodeposited on surface of glassy carbon electrode. The biosensor showed optimum response within 5 s at ...
Mishra K K - - 2013
Total phenolics, radical scavenging activity (RSA) on DPPH, ascorbic acid content and chelating activity on Fe(2+) of Pleurotus citrinopileatus, Pleurotus djamor, Pleurotus eryngii, Pleurotus flabellatus, Pleurotus florida, Pleurotus ostreatus, Pleurotus sajor-caju and Hypsizygus ulmarius have been evaluated. The assayed mushrooms contained 3.94-21.67mg TAE of phenolics, 13.63-69.67% DPPH scavenging activity, 3.76-6.76mg ...
Madeira Pedro P - - 2012
Partition ratios of 10 l-amino acids with non-polar side chains (Gly, Ala, Val, nor-Val, Ile, Leu, nor-Leu, Phe, Trp and Pro) were measured in ten different polymer/polymer aqueous two-phase systems (ATPS) containing 0.15M NaCl in 0.01M phosphate buffer, pH 7.4. The solute-specific coefficients representing the solute dipole-dipole, hydrogen bonding and ...
Atar Aslı Inci - - 2012
OBJECTIVE: A link between uric acid levels and cardiovascular diseases has been previously reported. Coronary artery calcium score (CACS) is a marker of atherosclerotic disease and a predictor of cardiovascular events. We sought to determine if serum uric acid level is an independent risk factor for the presence of calcium ...
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