Search Results
Results 351 - 400 of 2351
< 3 4 5 6 7 8 9 10 11 12 13 >
Wang Qingzhao - - 2011
The high fermentation cost of lactic acid is a barrier for polylactic acid (PLA) to compete with the petrochemical derived plastics. In order to lower the cost of lactic acid, the industry needs a microorganism that can ferment various sugars at high temperature (50°C) and at the same time using ...
Panagou E Z - - 2011
This study examined the impact of different mixtures of NaCl, KCl, and CaCl(2) on the fermentation profiles of Conservolea natural black olives. Five different combinations of chloride salts were investigated, namely (i) 8% NaCl (control treatment), (ii) 4% NaCl and 4% KCl, (iii) 4% NaCl and 4% CaCl(2), (iv) 4% ...
Yoshida Shogo - - 2011
In order to achieve efficient D: -lactic acid fermentation from a mixture of xylose and glucose, the xylose-assimilating xylAB operon from Lactobacillus pentosus (PXylAB) was introduced into an L: -lactate dehydrogenase gene (ldhL1)-deficient Lactobacillus plantarum (ΔldhL1-xpk1::tkt-Δxpk2) strain in which the phosphoketolase 1 gene (xpk1) was replaced with the transketolase gene ...
Marcelli Tommaso - - 2011
The mechanism of the reaction between carbodiimides and activated α,β-unsaturated carboxylic acids yielding fully substituted hydantoins and variable amounts of N-acyl urea by-products was studied using density functional theory calculations. Two alternative pathways featuring N-acyl ureas and imino-oxazolidinones as intermediates for the formation of the hydantoin product were taken into ...
Li Qiuting - - 2011
We prepared the diastereoisomers of BINOL based bisboronic acid chiral probes (the probes are with dual chirogenic centers) for enantioselective recognition of chiral analytes, such as tartaric acids, D-sorbitol, etc. We found the diastereoisomeric probes give different emission intensity-pH profiles, a phenomenon was reported, probably, for the first time. We ...
Shinkawa Satoru - - 2011
In order to achieve efficient homo L-lactic acid fermentation from xylose, we first carried out addition of xylose assimilation ability to Lactococcus lactis IL 1403 by introducing a plasmid carrying the xylRAB genes from L. lactis IO-1 (pXylRAB). Then modification of xylose assimilation pathway was carried out. L. lactis has ...
Philippaerts An - - 2011
The reactive double bonds in conjugated vegetable oils are of high interest in industry. Traditionally, conjugated vegetable oils are added to paints, varnishes, and inks to improve their drying properties, while recently there is an increased interest in their use in the production of bioplastics. Besides the industrial applications, also ...
Lei Zhang - - 2011
The Rhizobium sp. strain PR389 was isolated from the root nodules of Pueraria lobata (Willd.) Ohwi, which grows in acidic (pH 4.6) yellow soil of the Jinyun Mountains of Beibei, Chongqing, China. While rhizobia generally have a pH range of 6.5-7.5 for optimum growth, strain PR389 grew in a liquid yeast ...
Aikman P C - - 2011
This study investigated the effect of using the lactate-utilizing bacterium Megasphaera elsdenii NCIMB 41125 as a probiotic supplement on rumen fermentation and pH in dairy cows in the immediate postcalving period. Fourteen multiparous rumen-fistulated Holstein cows, blocked according to 305-d milk yield in the previous lactation, were used in a ...
Cherdthong Anusorn - - 2011
In this experiment the effects of different urea products (urea [U] and urea-calcium mixtures [UCM]) on rumen fermentation were investigated in dependence of different energy sources by using in vitro techniques. The 7 x 2 factorial arrangement followed a completely randomised design using seven urea products (U100, U40CaCl2, U50CaCl2, U60CaCl2, ...
San-Juan Felipe - - 2011
A satisfactory model explaining quality could be built in a set of 25 high quality Spanish red wines, by aroma-active chemical composition. The quality of the wines was positively correlated with the wine content in fruity esters, acids, enolones and wood derived compounds, and negatively with phenylacetaldehyde, acetic acid, methional ...
Cetó Xavier - - 2011
A new amperometric bienzymatic biosensor for gluconic acid based on the coimmobilization of gluconokinase (EC 2.7.1.12) and phosphogluconate dehydrogenase (EC 1.1.1.44) by polysulfone membrane entrapment onto the surface of a graphite-epoxy composite is reported. This biosensor represents an alternative to gluconate dehydrogenase (EC 1.1.99.3) based methods, which is no longer ...
Huang Yu-Chun - - 2011
A gene (axe) encoding the AXE thermostable esterase in Thermobifida fusca NTU22 was cloned into a Yarrowia lipolytica P01g host strain. Recombinant expression resulted in extracellular esterase production at levels as high as 70.94U/ml in Hinton flask culture broth, approximately 140 times higher than observed in a Pichia pastoris expression ...
Qiao Jian-Jun - - 2011
Spent mushroom substrate (SMS) was treated with dilute sulfuric acid followed by cellulase and xylanase treatment to produce hydrolysates that could be used as the basis for media for the production of value added products. A L9 (3(4)) orthogonal experiment was performed to optimize the acid treatment process. Pretreatment with ...
Gurram Raghu N - - 2011
Within the biorefinery paradigm, many non-monomeric sugar compounds have been shown to be inhibitory to enzymes and microbial organisms that are used for hydrolysis and fermentation. Here, two novel separation technologies, polyelectrolyte polymer adsorption and resin-wafer electrodeionization (RW-EDI), have been evaluated to detoxify a dilute acid pretreated biomass slurry. Results ...
Wu Yubo - - 2011
We have prepared chiral fluorescent bisboronic acid sensors with 3,6-dithiophen-2-yl-9H-carbazole as the fluorophore. Thiophene moiety was used to extend the pi-conjugation framework of the fluorophore in order to red-shift of the fluorescence emission, and at the same time, to enhance the novel d-PET effect of the boronic acid sensors, i.e. ...
Li Haixing - - 2011
Gamma-aminobutyric acid (GABA) is a non-proteinaceous amino acid that is widely distributed in nature and acts as the major inhibitory neurotransmitter in the mammalian brain. This study aimed to find a separation method for getting high-purity GABA from a fermented broth. Firstly, a fermented broth with a high content of ...
Zhang Fuzhong - - 2011
Production of biofuels from renewable resources such as cellulosic biomass provides a source of liquid transportation fuel to replace petroleum-based fuels. This endeavor requires the conversion of cellulosic biomass into simple sugars, and the conversion of simple sugars into biofuels. Recently, microorganisms have been engineered to convert simple sugars into ...
Nassu R T - - 2011
This study was conducted to investigate changes in fatty acid profiles of beef cows fed grass hay or barley silage based diets, with or without flaxseed supplementation. Both flaxseed and hay feeding increased levels of α-linolenic acid (LNA; 18:3n-3) in longissimus thoracis and backfat (P<0.001). A forage type by flaxseed ...
He Fang - - 2011
The influence of three alkaline amino acids, l-lysine (L-Lys), l-arginine (L-Arg) and l-histidine (L-His), on the aggregation behaviour of sodium deoxycholate (NaDC) in phosphate buffer, pH 7.0, was studied at 25 °C. The fluorescence probe technique based on pyrene was employed to determine accurately the critical aggregation concentration (cac), polarity of ...
Dos-Santos Noelia - - 2011
We characterize differences in cell wall material and polysaccharide structures, due to the quantitative trait loci associated with higher flesh firmness in a non-climacteric near-isogenic line (NIL) SC7-2, and with the climacteric behavior of the NIL SC3-5-1, using their non-climacteric inbred parentals, "Piel de Sapo" (PS) and PI 161375 (SC). ...
Skeberdis Vytenis A VA Lithuanian University of Health Sciences, Institute of Cardiology, 17 Sukilėliųu Avenue, Kaunas 50009, - - 2011
Gap junction (GJ) channels formed from connexin (Cx) proteins provide a direct pathway for electrical and metabolic cell–cell communication exhibiting high sensitivity to intracellular pH (pH(i)). We examined pH(i)-dependent modulation of junctional conductance (g(j)) of GJs formed of Cx26, mCx30.2, Cx36, Cx40, Cx43, Cx45, Cx46, Cx47 and Cx50 by reagents ...
Afoakwa Emmanuel Ohene - - 2011
Changes in acidification, proteolysis, sugars and free fatty acids (FFAs) concentrations of Ghanaian cocoa beans as affected by pulp preconditioning (pod storage or PS) and fermentation were investigated. Non-volatile acidity, pH, proteolysis, sugars (total, reducing and non-reducing) and FFAs concentrations were analysed using standard methods. Increasing PS consistently decreased the ...
Pfleger Andrea - - 2011
Use of a wheat growth bio assay after 7 days in research on homeopathic dilutions of gibberellic acid. Grains of winter wheat (Triticum aestivum, Capo variety) were observed under the influence of extremely diluted gibberellic acid (10(-30)) prepared by stepwise dilution and agitation according to a protocol derived from homeopathy ...
Liu Yifan - - 2011
Chiral bisboronic acid chemosensors based on ethynylated carbazole were prepared. The chiral chemosensors show red-shifted emission than the chemosensors with unsubstituted carbazole fluorophore. a-PET effect was found for the chemosensors, which is different from our previous observation of the d-PET effect for boronic acid chemosensors based on carbazole. Enantioselective recognition ...
Wang Hui-Er - - 2011
Fermented soybean liquid (FSL) has been well cited for its broad spectrum of biological effects, yet its documented gastropeptic ulcer (GPU) ameliorating effect is still lacking. It was hypothesized that to avoid the injury exerted by gastric fluid, HP has to be sheltered in chyme emulsions immediately on infection. The ...
Zhong Runsheng - - 2011
The physical and hydrodynamic properties of kaolin flocs including floc size, strength, regrowth, fractal structure and settling velocity were investigated by in situ particle image velocimetry technique at different humic acid concentration. Jar-test experimental results showed that the adsorbed humic acid had a significant influence on the coagulation process for ...
Ciosek Patrycja - - 2011
The analysis of amino acids and oligopeptides as important bioanalytes is a significant task in medical diagnostics and proteomic research and currently it is based on chromatographic and electrophoretic methods. In this paper, an approach based on sensor array coupled with titration is proposed for effective recognition of 5 amino ...
Rudolph Wolfram W - - 2011
Aqueous solutions of sodium tribromoacetate (NaCBr(3)CO(2)) and its corresponding acid (CBr(3)COOH) have been studied using Raman and infrared spectroscopy. The spectra of the species in solution were assigned according to symmetry C(s). Characteristic bands of CBr(3)CO(2)(-)(aq) and the tribromoacetic acid, CBr(3)COOH(aq), are discussed. For the hydrated anion, the CO(2) group, ...
Lemaire Sandrine - - 2011
Finafloxacin, an 8-cyano-substituted fluoroquinolone, expresses enhanced activity at acidic pH and is less susceptible to several fluoroquinolone resistance determinants. In this study, we compared finafloxacin and ciprofloxacin for (i) activity against ciprofloxacin-susceptible and -resistant Staphylococcus aureus as well as wild-type and Lde efflux-positive (Lde+) Listeria monocytogenes, (ii) accumulation in THP-1 ...
Lee Jae-Won - - 2011
Building on our laboratory-scale optimization, oxalic acid was used to pretreat corncobs on the pilot-scale. The hydrolysate obtained after washing the pretreated biomass contained 32.55g/l of xylose, 2.74g/l of glucose and low concentrations of inhibitors. Ethanol production, using Scheffersomyces stipitis, from this hydrolysate was 10.3g/l, which approached the predicted value ...
Zhao Jinyang - - 2011
β-Glucans obtained from barley, seaweed, bacteria, and mushroom sclerotia were incubated with pure cultures of Bifidobacterium infantis , Bifidobacterium longum , and Bifidobacterium adolescentis for a 24 h batch fermentation to evaluate their bifidogenic effect with inulin as the positive control. The pH value in all culture media was decreased ...
Makhutova Olesia N - - 2011
We studied the fatty acid (FA) content and composition of ten zoobenthic species of several taxonomic groups from different freshwater bodies. Special attention was paid to essential polyunsaturated fatty acids, eicosapentaenoic acid (EPA, 20:5n-3), docosahexaenoic acid (DHA, 22:6n-3), and arachidonic acid (ARA, 20:4n-6); and the n-3/n-6 and DHA/ARA ratios, which ...
Plasson Raphaël - - 2011
A good comprehension of the reactivity of peptides in aqueous solution is fundamental in prebiotic chemistry, namely for understanding their stability and behavior in primitive oceans. Relying on the stereoselectivity of the involved reactions, there is a huge interest in amino acid derivatives for explaining the spontaneous emergence of homochirality ...
Kairenius Piia - - 2011
The abundance of 20- to 24-carbon fatty acids in omasal digesta of cows fed grass silage-based diets supplemented with 0 (Control) and 250 g/day of fish oil (FO) was examined to investigate the fate of long-chain unsaturated fatty acids in the rumen. Complimentary argentation thin-layer chromatography and gas-chromatography mass-spectrometry analysis of ...
Marcotullio G - - 2011
Starting from the results achieved in a previous work on the effects of Cl(-) ions on furfural formation in aqueous acid solution [Marcotullio, G. et al., Green Chem.2010, 12, 1739], the general effect of different halides is addressed. Experimental results show the halides to influence at least two distinct steps ...
Endo Satoshi - - 2011
Aldo-keto reductase (AKR) 1B14, a rat ortholog of mouse androgen-dependent vas deferens protein (AKR1B7), is involved in the synthesis of prostaglandin F(2α) and detoxification of 4-oxononenal formed by lipid peroxidation. The NADPH-linked reductase activity of AKR1B14 was activated by various bile acids. Although the activation was increased by decreasing pH ...
Huang Hongzhi - - 2011
Compounds inhibitory to enzymatic hydrolysis and fermentation are generated from neutral steam exploded corn stover in the process of producing bio-ethanol. In this study, weak acids were identified as main yeast inhibitors, while phenols and aldehyde contribute to the inhibition to a lower degree. Main weak acids in hydrolysates are ...
Guo Peng - - 2011
The effects of sulfuric acid, acetic acid, aqueous ammonia, sodium hydroxide, and steam explosion pretreatments of corn stalk on organic acid production by a microbial consortium, MC1, were determined. Steam explosion resulted in a substrate that was most favorable for microbial growth and organic acid productions. The total amounts of ...
Jiang T - - 2011
The objective was to determine the impact of increasing levels of Eicosapentaenoic acid (EPA; C20:5n3) and Docosahexaenoic acid (DHA; C22:6n3) on beef palatability. Two commercial supplements of EPA and DHA were added to 85% lean ground beef patties (176.2±3.76g) with different levels (0, 0.3, 0.4, 0.5, 0.6, 0.7, and 1% ...
Bílková Eliška - - 2011
The acylation of prednisolone 20-hydrazone with star poly(ethylene glycol) tetracarboxylic acid (M=20,000) has been used to prepare the corresponding pH-sensitive conjugate. With α-cyclodextrin, this conjugate forms a polypseudorotaxane, which was characterised by means of (1)H NMR spectra, powder X-ray diffraction patterns and STM microscopy. The rate of acid-catalysed hydrolysis of ...
Valladão A B G - - 2011
The hydrolysis of effluent from a poultry slaughterhouse containing 800mg oil and grease (O&G)/L was conducted with 1% (w/v) of an enzymatic pool obtained by solid-state fermentation with the fungus Penicillium restrictum. The chromatographic evaluation of the lipid profile during hydrolysis indicated a higher concentration of acids after 4h of ...
Nassar Nashaat N - - 2011
This study investigates the effect of surface acidity and basicity of aluminas on asphaltene adsorption followed by air oxidation. Equilibrium batch adsorption experiments were conducted at 25°C with solutions of asphaltenes in toluene at concentrations ranging from 100 to 3000g/L using three conventional alumina adsorbents with different surface acidity. Data ...
Velmurugan Rajendran - - 2011
In this study, the production of sugar monomers from sugarcane bagasse (SCB) by sono-assisted acid hydrolysis was performed. The SCB was subjected to sono-assisted alkaline pretreatment. The cellulose and hemicellulose recovery observed in the solid content was 99% and 78.95%, respectively and lignin removal observed during the pretreatment was about ...
Yemiş Oktay - - 2011
Furfural is a biomass derived-chemical that can be used to replace petrochemicals. In this study, the acid-catalyzed conversion of xylose and xylan to furfural by microwave-assisted reaction was investigated at selected ranges of temperature (140-190°C), time (1-30min), substrate concentration (1:5-1:200 solid:liquid ratio), and pH (2-0.13). We found that a temperature ...
Scerra M - - 2011
Forty male Italian Merino lambs were used to study the effects of four feeding systems on muscle fatty acids composition: S group-ten lambs were kept indoors, and fed with concentrate for all experimental period (89days); P group-ten lambs were allowed to graze a pasture for all experimental period; PS37 group-ten ...
Shen Jiacheng - - 2011
Pretreatment of corn stover in 0.5% sulfuric acid at 160°C for 40min realized a maximum monomeric plus oligomeric xylose yield of 93.1% compared to a maximum of only 71.5% for hydrothermal (no added mineral acid) pretreatment at 180°C for 30min. To explain differences in dilute acid and hydrothermal yields, a ...
Salon Jozef - - 2011
It is challenging to effectively deprotect hydroxyl groups of acid-or-base sensitive bio-macromolecules without causing even minor defects and compromising high quality of final products. We report here a mild detritylation strategy in mildly acidic buffers to remove the DMTr protection from the 5'-hydroxyl groups of synthetic nucleic acids. The DMTr-groups ...
Abdel-Nour Nicolas - - 2011
Quantification of n-3 polyunsaturated fatty acids (PUFA) is an important aspect in quality control of designer eggs. Prediction of these fatty acids would be of value for egg grading stations. The aim of the present study was to evaluate the ability of hyperspectral imaging (HSI) to classify the eggs according ...
Nayak Anjali - - 2011
Ibuprofen-polyethylene glycol (PEG) conjugates (PEG-Ibu) were prepared and their potential as a prolonged release system was investigated. Two PEG-Ibu conjugates were synthesized from Ibuprofen and PEG with two different molecular weights by esterification in the presence of DCC and DMAP. The PEG-Ibu conjugates were characterized by FT-IR, (1)H NMR, Mass ...
< 3 4 5 6 7 8 9 10 11 12 13 >