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Puthusseri Bijesh - - 2013
Foliage of Coriandrum sativum is a rich source of natural folates amenable for enhancement through salicylic acid-mediated elicitation, thereby holding a great promise for natural-mode alleviation of this vitamin (B(9)) deficiency. In the present study we report salicylic acid-mediated differential elicitation of different forms of folates - 5-methyltetrahydrofolate, 5-formyltetrahydrofolate and ...
Nehdi Imededdine Arbi - - 2013
The physicochemical properties, fatty acid, tocopherol, thermal properties, (1)H NMR, FTIR and profiles of non-conventional oil extracted from Citrullus colocynthis (L.) Schrad seeds were evaluated and compared with conventional sunflower seed oil. In addition, the antioxidant properties of C. colocynthis seed oil were also evaluated. The oil content of the ...
Jirimali Harishchandra Digambar - - 2013
A redox active polymer, hydroquinone modified chitosan (Q-chitosan) was synthesized and characterized by IR and (1)H NMR spectroscopy. The nanocomposite of Q-chitosan with carbon was prepared and used to construct a stable conductive film on the electrode surface. The SEM studies confirms that the Q-chitosan/C composite covers the electrode surface ...
Suk Jae-Min - - 2012
Chiral organic anions such as camphorsulfonates and cAMP give rise to the preferential formation of a one-handed helix of an indolocarbazole foldamer, thus inducing characteristic circular dichroic (CD) signals. Moreover, the on and off switching of the chiroptical signal can be operated by acid and base chemistry which efficiently controls ...
Kuzhiyil Najeeb - - 2012
Depolymerization of cellulose offers the prospect of inexpensive sugars from biomass. Breaking the glycosidic bonds of cellulose to liberate glucose has usually been pursued by acid or enzymatic hydrolysis although a purely thermal depolymerization route to sugars is also possible. Fast pyrolysis of pure cellulose yields primarily the anhydrosugar levoglucosan ...
Liu Rui-Lin - - 2012
A rapid and practical microwave-assisted one-step extraction-derivatization (MAED) method was developed for gas chromatography-mass spectrometry analysis of fatty acids profile in herbal medicine. Several critical experimental parameters for MAED, including reaction temperature, microwave power and the amount of derivatization reagent (methanol), were optimized with response surface methodology. The results showed ...
Zhang Fenfen - - 2012
A novel cysteic acid modified carbon paste electrode (cysteic acid/CPE) based on electrochemical oxidation of l-cysteine was developed to simultaneously determine ofloxacin and gatifloxacin in the presence of sodium dodecyl benzene sulfonate (SDBS). Fourier transform infrared spectra (FTIR) indicated that l-cysteine was oxidated to cysteic acid. Electrochemical impedance spectroscopy (EIS) ...
Esfandiari Leyla - - 2012
We describe a platform for sequence-specific nucleic acid (NA) detection utilizing a micropipet tapered to a 2 μm diameter pore and 3 μm diameter polystyrene beads to which uncharged peptide nucleic acid (PNA) probe molecules have been conjugated. As the target NAs hybridize to the complementary PNA-beads, the beads acquire ...
Gyenes T - - 2012
In the present paper we report the development of redox responsive biocompatible polymer gels for the first time. Double crosslinked poly(aspartic acid) hydrogels were prepared by using two different cross-linking agents simultaneously. One of the cross-linker was diaminobutane (DAB), the other was cystamine (CYS). The relative amount of DAB and ...
Rosario-Meléndez Roselin - - 2013
The formulation of salicylate-based poly(anhydride-ester) (PAE) microspheres was optimized by altering polymer concentration and homogenization speed to improve the overall morphology. The microspheres were prepared using three salicylate-based PAEs with different chemical compositions comprised of either a heteroatomic, linear aliphatic, or branched aliphatic moiety. These PAEs broadened the range of ...
Guzzi Rita - - 2012
Beta-lactoglobulin (β-LG) is a member of the lipocalin protein family involved in the transport of fatty acids and other small hydrophobic molecules. The main binding site is at a central cavity, referred to as "calyx", formed by the protein β-barrel sandwich. Continuous wave and pulsed Fourier Transform Electron Spin Resonance ...
Gorjanovic Stanislava - - 2012
Hydrogen peroxide scavenging (HPS) activity of unfermented (green, yellow and white), partially fermented (oolong) and completely fermented (black) tea (Camellia sinensis), maté (llex paraguariensis), various herbal infusions, as well as individual compounds (flavan-3-ols, flavonols, cinnamic and benzoic acids, and methylxanthines) was assessed by recently developed direct current (DC) polarographic assay. ...
Cui Yu-Hong - - 2012
Ti/Sb-SnO(2) and three kinds of rare earths (REs), namely Ce, Gd, and Eu doped Ti/Sb-SnO(2) electrodes were prepared and tested for their capacity on electrocatalytic degradation of three kinds of basal aromatic compounds (benzoquinone, hydroquinone and catechol) and six kinds of aliphatic acids (maleic acid, fumaric acid, succinic acid, malonic ...
Can Daniel - - 2012
Starting from asymmetric Thiele's acid derivatives, two different imaging probes [(99m) Tc(CO)(3) (CpR)] (R=potential targeting vector) are generated simultaneously in one-pot and from one substrate. This extends the previously introduced labeling strategy of metal-mediated retro-Dielsï£żAlder reaction with HCp-R dimers. We demonstrate that chemically active functionalities such as hydroxamic acids are ...
Das Madhuri - - 2012
Rapid detection of alcohol is important in clinical diagnosis and fermentation industry. An octameric alcohol oxidase (AOx) (Mr 675kDa) from Pichia pastoris, immobilized on multiwalled carbon nanotubes-Nafion® (MWCNT-Nf) matrix and encapsulated with polyethylenimine (PEI) on gold electrode (AuE), showed a redox peak at 0.21V (vs. Ag/AgCl electrode at pH 7.5) ...
Hicks Joshua M - - 2012
A single-laboratory-validated NMR spectroscopy method was established for determining the quantity of chlorogenic acid and hyperoside from crude extract material of blueberry leaves of the species Vaccinium angustifolium var. laevifolium House. The calibration curve of chlorogenic acid showed a highly linear regression, R = 0.99998. NMR spectroscopy identification and quantification ...
Hughes Brianna H - - 2012
Oat and soy-based nutrition bars were fortified with 4 levels of fish oil (0, 6, 12, or 18 g per approximately 600 g batch), representing 0%, 20%, 40%, or 60% replacement of canola oil. The commercially available purified fish oil was not emulsified nor encapsulated, and contained tocopherols. Baked nutrition ...
Shin Eui-Cheol EC Department of Food Science & Institute of Fusion Biotechnology, Gyeongnam National University of Science and Technology, Gyeongnam 660-758, - - 2012
The purpose of this study was to investigate the fatty acid profiles in 18 soybean cultivars grown in Korea. A total of eleven fatty acids were identified in the sample set, which was comprised of myristic (C14:0), palmitic (C16:0), palmitoleic (C16:1, ω7), stearic (C18:0), oleic (C18:1, ω9), linoleic (C18:2, ω6), ...
Lillebø Ana Isabel - - 2012
The present study aimed to assess if ragworm fatty acids (FA) profiles could be used to discriminate their spatial distribution in an historically mercury-contaminated estuarine environment, i.e., if it was possible to differentiate ragworms present in salt marsh sediments surrounding plant roots and rhizomes (rhizosediment) from adjacent unvegetated sediment. Additionally, ...
Wang Xueqing X Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing, - - 2012
The study was aimed to prepare a series of poly(acrylic acid)-cysteine-2-mercaptonicotinic acid conjugates (preactivated thiomers) and to evaluate the influence of molecular mass or degree of preactivation with 2-mercaptonicotinic acid (2MNA) on their permeation enhancing properties. Preactivated thiomers with different molecular mass and different degree of preactivation were synthesized and ...
Rigane Ghayth - - 2012
BACKGROUND: The characterisation of virgin olive oils from two Tunisian cultivars, growing in the Tataouin zone, namely Jemri-Bouchouka, a rare olive cultivar, and Chemlali-Tataouin, was carried out. Several analytical parameters were evaluated; these include quality index, fatty acids, phenolic, chlorophyll, carotenoid, squalene, α-tocopherol compositions and oxidative stability. RESULTS: Jemri-Bouchouka olive ...
Deshpande Rohit - - 2012
New opp-dibenzoporphyrins were prepared in a concise method that was based on a Pd(0) -catalyzed cascade reaction. These porphyrins, which contained carboxylic-acid linker groups on benzene rings that were fused to the porphyrin at their β,β'-positions, were examined as sensitizers for dye-sensitized solar cells for the first time. Whereas all ...
Papatsaroucha Eleni - - 2012
In this research, the microbiological and physicochemical changes during preservation of pears in water in the presence of Sinapis arvensis seeds (PWS FL) according to the traditional Greek home food manufacture were studied. Pears preserved in water served as control (PW FL). The growth of lactic acid bacteria (LAB) coming ...
Meyer Barbara J - - 2012
OBJECTIVE: Polyunsaturated fatty acids (PUFAs), including the long-chain (LC) ω-3 PUFAs, are important for health. The aim was to assess if the Anti-Cancer Council of Victoria Dietary Questionnaire (ACC DQ) accurately determines PUFA intakes compared with the recently validated electronic PUFA food-frequency questionnaire (FFQ). METHODS: Forty-one study volunteers were recruited ...
Li Xin - - 2012
When fermenting on cassava (15-25%, w/v) with Clostridium acetobutylicum ATCC824, a severe delay (18-40h) was observed in the phase shift from acidogenesis to solventogenesis, compared to the cases of fermenting on corn. By adding yeast extract (2.5g/L-broth) into cassava meal medium when the delay appeared, the phase shift was triggered ...
Yuan Chao - - 2013
Storage stability of astaxanthin/hydroxypropyl-β-cyclodextrin (HPCD) inclusion complex was evaluated and which was compared with native astaxanthin. The storage stability of astaxanthin was enhanced after included in HPCD under 4°C and 25°C storage conditions. Antioxidant activity of astaxanthin/HPCD inclusion complex was also assayed using ascorbic acid as a control sample. The ...
Niu Xiuli - - 2012
A sensitive and selective electrochemical sensor for determination of dopamine (DA) was fabricated based on 3,4,9,10-perylene tetracarboxylic acid functionalized graphene sheets, multi-wall carbon nanotubes and ionic liquid modified glass carbon electrode and the properties of modified electrode were characterized by scanning electron microscopy, transmission electron microscope and electrochemical impedance spectroscopy. ...
Floris Franca Maria - - 2012
We present density functional theory (DFT) and quantum Monte Carlo (QMC) calculations of the glutamic acid and glutamate ion in vacuo and in various dielectric continuum media within the polarizable continuum model (PCM). In DFT, we employ the integral equation formalism variant of PCM while, in QMC, we use a ...
Han Jing - - 2012
A novel ultrasensitive electrochemical immunoassay for the determination of apurinic/apyrimidinic endonuclease (APE-1) using a three-step signal amplification process was reported in this work. The first-step signal amplification process was based on the labeled biotinylated alkaline phosphatase (bio-AP) on the nickel hexacyanoferrates nanoparticle-decorated Au nanochains (Ni-AuNCs) toward the biocatalysis of ascorbic ...
Zhang Liying - - 2012
To study the target proteins of oleanolic acid, a series of novel photoaffinity probes were designed and synthesized. Their affinity for the target proteins was evaluated in an enzyme inhibition assay against glycogen phosphorylase, a known target protein of oleanolic acid. Among these compounds, probe 2 exhibited the most potent ...
Dunning Kylie R - - 2012
Successful embryo and fetal development is dependent on the quality of the oocyte from which it was derived. Several studies to date have demonstrated the link between appropriate metabolism and sufficient ATP production with oocyte quality and preimplantation embryo development. Metabolism of fatty acids for the purpose of synthesizing ATP ...
Yan Qun - - 2012
Enhanced biomethanation with acid stress on anaerobic sludge, dehydrogenase activity, protein expression, and the primary proteomic profiling of microbial communities during the enhanced anaerobic digestion process from Taihu Blue Algae were investigated. It was found that the accumulation of organic acids and the specific biogas accumulation rate were 1.8 and ...
Tazawa Hiroshi - - 2012
Acid-base and hematocrit (Hct) responses of vertebrate embryos to severe hypoxia are as yet unknown, but may reveal the maturation process of physiological regulatory mechanisms. The present study elucidated how acute, severe hypoxia (10% O(2), with and without 5% CO(2)) affects Hct and blood acid-base balance in late prenatal (days ...
Niu Xiuli - - 2012
A promising electrochemical sensor for simultaneous determination of dopamine (DA), uric acid (UA) and ascorbic acid (AA) was fabricated based on the stacked graphene platelet nanofibers (SGNF)/ionic liquid (IL)/chitosan (CS) modified electrode. The SGNF/IL/CS modified electrode possessed excellent electrocatalytic activity towards the oxidation of DA, UA and AA with obvious ...
Tamtam Fatima - - 2012
It was shown, through a combination of field and laboratory observations, that salicylic acid can undergo photo-bromination reactions in sunlit saline surface waters. Laboratory-scale experiments revealed that the photochemical yields of 5-bromosalicylic acid and 3,5-dibromosalicylic acid from salicylic acid were always low (in the 4% range at most). However, this ...
Ji Ying - - 2012
The objectives of this study were to determine the chemical composition, energy content and amino acid digestibility for corn gluten meals (CGM) and to develop prediction equations for estimating energy content and amino acid digestibility for growing pigs based on the chemical characteristics of these meals. The 15 CGM tested ...
Wu Geng-Huang - - 2012
In this study, an electrochemical ascorbic acid (AA) sensor was constructed based on a glassy carbon electrode modified with palladium nanoparticles supported on graphene oxide (PdNPs-GO). PdNPs with a mean diameter of 2.6nm were homogeneously deposited on GO sheets by the redox reaction between PdCl(4)(2-) and GO. Cyclic voltammetry and ...
Gupta Neeraj - - 2012
D-amino acid oxidase (DAAO) is biotechnologically relevant enzyme that is used in various food and pharmaceutical industries. DAAO from the yeast Trigonopsis variabilis is an important agent for use in commercial applications because of its high activity with cephalosporin C and is reasonable resistant to the oxidants O2 and H2O2 ...
Khazraie Shoulaifar Tooran - - 2012
Torrefaction is moderate thermal treatment (∼200-300°C) to improve the energy density, handling and storage properties of biomass fuels. In biomass, carboxylic sites are partially responsible for its hygroscopic. These sites are degraded to varying extents during torrefaction. In this paper, we apply methylene blue sorption and potentiometric titration to measure ...
Obinata Akiko - - 2012
BACKGROUND: Retinoic acid, an active metabolite of retinol, is known to regulate cell proliferation, differentiation, and morphogenesis during normal development of many tissues. Using chick embryonic tibial skin, we showed previously that the expression of Gbx1, a divergent homeobox gene, is increased in the epidermis through interaction with retinol-pretreated dermal ...
Lawal Abdulazeez T - - 2012
A potentiometric enzyme electrode for detection of hypoxanthine (Hx) in fish meat is described. The sensor was developed by entrapment of xanthine oxidase (XOD) and ferrocene carboxylic acid (Fc) into polypyrrole (PPy) film during galvanostatic polymerisation film formation. The responses for Hx were obtained in 0-05M phosphate buffer (pH 7.1) ...
Zara Giacomo - - 2012
Air-liquid biofilm formation is largely dependent on Flo11p and seems related to cell lipid content and composition. Here, it is shown that in the presence of cerulenin, a known inhibitor of the fatty acid synthase complex, biofilm formation is inhibited together with FLO11 transcription in a flor strain of Saccharomyces ...
Zhang Xu - - 2012
A simple, rapid microwave digestion procedure for protein hydrolysis preceding the determination of amino acids in yeast using gas chromatography-mass spectrometry (GC-MS) is described. Protein hydrolysis was performed in a focused microwave using 4M methanesulfonic acid (MAS). Amino acids were derivatized with methyl chlorofomate (MCF) and extracted into chloroform prior ...
Coskuner Enis Rauf - - 2012
Penile girth enhancement is a controversial subject but demands for enhancement are increasing steadily. Although various fillers have been widely used for soft tissue augmentation, there is no reliable material for this particular situation. Here we report a case of an acute hypersensitivity reaction in a man after his first ...
Zhang Shijuan - - 2012
A new labeling reagent for fatty acids, 1-(9H-carbazol-9-yl) propan-2-yl-methanesulfonate (CPMS), has been synthesized and successfully applied to the HPLC determination of fatty acids in traditional Chinese herb Notopterygium forbesii Boiss. The reaction of CPMS with fatty acids could proceed easily and quickly in the presence of K(2)CO(3) catalyst within 30min. ...
Sádecká Jana - - 2012
Two spectrofluorimetric methods have been developed for the rapid determination of ellagic acid. The first method is based on the complex formation between ellagic acid and borax in methanol solution. The fluorescence of the complex is monitored at an emission wavelength of 456nm with excitation at 383nm. Linear calibration curve ...
Burggren Warren W - - 2012
How the determinants of hematocrit (Hct) - alterations in mean corpuscular volume (MCV) and/or red blood cell concentration ([RBC]) - are influenced by acid-base balance adjustments across development in the chicken embryo is poorly understood. We hypothesized, based on oxygen transport needs of the embryos, that Hct will increase during ...
Yin Hongyu - - 2012
Ni-catalyzed ketone formation through mild reductive coupling of a diverse set of unactivated alkyl bromides and iodides with particularly aryl acid anhydrides was successfully developed using zinc as the terminal reductant. These conditions also allow direct coupling of alkyl iodides with aryl acids in the presence of Boc(2)O and MgCl(2).
Wong Zhi Xiang - - 2012
The gas-phase acidity and the pKa values of the organic acids have been attracting a lot of attention from organic and analytical chemists. The gas-phase acidity and pKa calculations for some oxocarbon acids were investigated under B3LYP/6-311+G(d,p) level of theory. In this study, four oxocarbon acids, CnOnH2 were selected, namely ...
Ma Yan - - 2012
Selenium (Se) is an essential micronutrient, but also a potential toxin, which may be absorbed in excess. Relatively little is known about selenium embryotoxicity in zebrafish. In this study, we evaluated the effect of selenite exposure in zebrafish embryos. Selenite treatment decreased survival and resulted in abnormal development in a ...
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