Search Results
Results 351 - 400 of 2088
< 3 4 5 6 7 8 9 10 11 12 13 >
Sezikli Mesut - - 2012
Background and Aim:  We aimed to evaluate the changes in histopathologic features, concentrations of vitamins C and E in gastric mucosa, and total antioxidant capacity of the body after ingestion of ascorbic acid and alpha tocopherol in patients with Helicobacter pylori. Material and Method:  Patients with H. pylori-positive nonulcer dyspepsia were ...
Al Bahry Saif - - 2012
To determine the effect of nalidixic acid on the morphology and protein expression of Pseudomonas aeruginosa (P. aeruginosa). Nalidixic acid solution of 1 600 μg/mL was prepared. The minimum inhibitory concentration (MIC) for P. aeruginosa was determined with tube dilution test. The effect of nalidixic acid on the morphology of ...
Nagant C - - 2012
Aims:  CSA-13 is an antimicrobial cationic steroid with some toxicity against eukaryotic cells. The purpose of this work was to test whether pluronic acid F-127 could interfere with the toxicity of CSA-13 on human umbilical vein endothelial (HUVEC) without modifying its bactericidal activity against P. aeruginosa. Methods and Results:  The ...
Nakagawa Hiroyuki - - 2012
The objective of this work is to examine the influence of oxalic acid formed on the degradation of phenol by Fenton reagent. Oxalic acid formed at initial stage within 30min significantly suppresses the reduction of ferric ion, thus terminating degradation reaction. The yield of oxalic acid is dependent on the ...
Sakai Aya - - 2012
Novel and effective drugs against acute pancreatitis are required. Therefore, we examined the changes in the metabolite levels in the serum and pancreatic tissue of mice with cerulein- and arginine-induced pancreatitis using gas-chromatography/mass-spectrometry (GC/MS) and investigated whether these alterations affected the severity of acute pancreatitis. In the cerulein-induced pancreatitis model, ...
Chatzifragkou Afroditi - - 2012
Aim of the present study was to evaluate the effect of exogenous additions of 1,3-propanediol (1,3-PDO) on microbial growth and metabolites production of Clostridium butyricum VPI 1718 strain, during crude glycerol fermentation. Preliminary batch cultures in anaerobic Duran bottles revealed that early addition of 1,3-PDO caused growth cessation in rather ...
Wu C-F - - 2012
Recently, flaxseed has become increasingly popular in the health food market because it contains a considerable amount of specific beneficial nutrients such as lignans and omega-3 fatty acids. However, the presence of cyanogenic glycosides (CGs) in flaxseed severely limits the exploitation of its health benefits and nutritive value. We, therefore, ...
Wajid Naji A - - 2012
Linoleic, oleic, and stearic fatty acids, presented vapor-phase retronasally, were discriminable from blanks and each other, but the same concentrations, oral-cavity-only (OCO), were not discriminable from blanks. It remained possible that higher concentrations might be discriminable OCO. To evaluate this, participants attempted to discriminate undiluted linoleic, oleic, or stearic acids, ...
Smink W - - 2012
A study was conducted to determine the effect of two levels of linoleic acid (LA) intake at either high or low α-linolenic acid (ALA) intake on their conversion and subsequent deposition into long-chain (20-22 C-atoms) polyunsaturated fatty acids (LC PUFA) in muscle and backfat in growing pigs. In a 2 × 2 ...
Zhang Geng - - 2012
Context:Few studies examined associations of circulating n-3 fatty acid levels with metabolic syndrome (MetS) among Chinese populations who have low consumption of these fatty acids and high risk of developing MetS.Objective:The objective of the study was to determine associations between erythrocyte n-3 fatty acids and MetS as well as its ...
Zhang Chen-Sheng - - 2012
(R)-o-Chloromandelic acid is the key precursor for the synthesis of Clopidogrel®, a best-selling cardiovascular drug. Although nitrilases are often used as an efficient tool in the production of α-hydroxy acids, there is no practical nitrilase specifically developed for (R)-o-chloromandelic acid. In this work, a new nitrilase from Labrenzia aggregata (LaN) ...
Skrzypczak-Pietraszek Ewa - - 2012
Melittis melissophyllum L. is an old medicinal plant. Nowadays it is only used in the folk medicine but formerly it has been applied in the official medicine as a natural product described in French Pharmacopoeia. M. melissophyllum herbs used in our studies were collected from two localities in Poland in ...
Andreou Dimitrios - - 2012
The D-amino acid oxidase activator (DAOA) protein regulates the function of D-amino oxidase (DAO), an enzyme that catalyzes the oxidative deamination of D-3,4-dihydroxyphenylalanine (D-DOPA) and D-serine. D-DOPA is converted to L-3,4-DOPA, a precursor of dopamine, whereas D-serine participates in glutamatergic transmission. We hypothesized that DAOA polymorphisms are associated with dopamine, ...
Mirmiran Parvin - - 2012
OBJECTIVE: To investigate the association of the intakes of ω-3 (including α-linolenic acid [ALA], eicosapentaenoic acid [EPA] plus docosahexaenoic acid [DHA]) and ω-6 polyunsaturated fatty acids (PUFAs), the interaction, and the ratio of these PUFAs with the metabolic syndrome (MetS) in adults. METHODS: This cross-sectional study was conducted in a ...
da Silva Acosta Daiane - - 2012
The carbon nanomaterial fullerene (C(60)) can act as anti or pro-oxidant. The aim of this study was to evaluate, in cell suspensions of carp brains (Cyprinus carpio, Cyprinidae), the effect of C(60) after a pre-treatment with polyunsaturated fatty acid (PUFAs) such as omega-3 (docosahexaenoic acid, DHA) and omega-6 (linoleic acid, ...
Guéant Rodriguez R M - - 2012
BACKGROUND: The deficiency in methyl donors, folate and vitamin B12, increases homocysteine and produces myocardium hypertrophy with impaired mitochondrial fatty acid oxidation and increased BNP, through hypomethylation of peroxisome-proliferator-activated-receptor gamma co-activator-1α, in rat. This may help to understand better the elusive link previously reported between hyperhomocysteinemia and BNP, in human. ...
Colapinto Cynthia K - - 2012
One-fifth of Canadian women of childbearing age (WCBA) have red blood cell (RBC) folate concentrations below those considered optimal for neural tube defect risk reduction (≥906 nmol·L(-1)). Determinants of optimal concentrations have not been examined in a nationally representative sample of Canadian WCBA since food fortification with folic acid was implemented. ...
Linander Nellie - - 2012
The honeybee is one of several insect model systems for the study of olfaction, yet our knowledge regarding the spectrum of odorants detectable by Apis mellifera is limited. One class of odorants that has never been tested so far are the amino acids, which are important constituents of floral nectar. ...
Mocking Roel J T - - 2012
Basic aspects in the handling of fatty acid-data have remained largely underexposed. Of these, we aimed to address three statistical methodological issues, by quantitatively exemplifying their imminent confounding impact on analytical outcomes: (1) presenting results as relative percentages or absolute concentrations, (2) handling of missing/non-detectable values, and (3) using structural ...
Kurata Shigeaki - - 2012
The purpose of this study was to evaluate the cytotoxicity of acrylic and methacrylic acid (AA and MA), propanoic acid and isobutylic acid (PRA and IBA) which were the corresponding saturated carboxylic acids, 2-hydroxylethyl methacrylate and acrylate (HEMA and HEA), and hydroquinone (HQ). The growth of the fibroblast when exposed ...
Du Qin - - 2012
Achieving an appropriate docosahexaenoic acid (DHA) status in the neonatal brain is an important goal of neonatal nutrition. We evaluated how different dietary fat matrices improved DHA content in the brains of both male and female rats. Forty rats of each gender were born from dams fed over gestation and ...
Levinskaite Loreta - - 2012
Microscopic fungi are able to contaminate and deteriorate various food products and can subsequently cause health problems. Long usage of the same preservatives and disinfectants against spoilage fungi may lead to the development of fungal resistance to those chemicals. The objective of this study was to investigate the susceptibility of ...
Bertolino Sueli M - - 2012
Volatile fatty acid (VFA) profile is an important parameter in anaerobic reactors because it enables the assessment of metabolic pathways. Volatile fatty acids were monitored during sulfate reduction in a UASB (upflow anaerobic sludge blanket) reactor treating 2g/L sulfate concentration and with the organic loading increasing from 3.5kgCOD/m(3)d to 5.9kgCOD/m(3)d, ...
Fernandes D L A - - 2012
Sulphite spent liquor (SSL) is a side product from acidic sulphite pulping of wood, which organic counterpart is composed mainly by lignosulphonates (LS) and sugars. The last are a prominent substrate for the bioprocessing although a previous purification step is necessary to eliminate microbial inhibitors. In this study a fractionation ...
Ye Yangfang - - 2012
Nicotine can cause oxidative damage to organisms; however, some bacteria, for example Pseudomonas sp. HF-1, are resistant to such oxidative stress. In the present study, we analyzed the concentration-dependent metabolic response of Pseudomonas sp. HF-1 to nicotine stress using (1)H NMR spectroscopy coupled with multivariate data analysis. We found that ...
Kang Sohye - - 2012
Adequate supply of nutrients, especially providing a sufficient level of specific amino acids, is essential for cell survival and production. Complex raw materials such as soy hydrolysates or yeast extracts are the source for both free amino acids and peptides. However, typical chemically-defined (CD) media provide amino acids only in ...
Hou Keke - - 2012
Ordered mesoporous carbons (OMCs) with hexagonal structure were efficiently synthesized via cooperative self-assembly of phenol/formaldehyde resol and surfactant F127 under acidic aqueous conditions. Induced by HCl, a gel phase mainly containing phenol/formaldehyde resol and F127 was obtained within several hours. X-ray diffraction (XRD), transmission electron microscope (TEM) and nitrogen adsorption ...
Maiti Soumen K - - 2012
The main objective of this work was to remove inhibitors and concentrate sugars in hydrolysates obtained from dilute acid-treated rice straw. The Donnan steric pore flow model (DSPM) was applied for membrane characterization and it captured the membrane transport adequately. The polyamide and polyethylene sulfate nanofiltration membranes of 150Da molecular ...
Tsai Hsiang-Yu - - 2012
Tellurium-nanowire-coated glassy carbon electrodes (TNGCEs) have been fabricated and employed for selective and sensitive detection of dopamine (DA). TNGCEs were prepared by direct deposition of tellurium nanowires, 600±150nm in length and 16±3nm in diameter, onto glassy carbon electrodes, which were further coated with Nafion to improve their selectivity and stability. ...
Abubackar Haris Nalakath - - 2012
A two-level full factorial design was carried out in order to investigate the effect of four factors on the bioconversion of carbon monoxide to ethanol and acetic acid by Clostridium autoethanogenum: initial pH (4.75-5.75), initial total pressure (0.8-1.6bar), cysteine-HCl·H(2)O concentration (0.5-1.2g/L) and yeast extract concentration (0.6-1.6g/L). The maximum ethanol production ...
Lin Yu Hong - - 2012
Large population studies show that polyunsaturated fatty acids are important for human health, but determining relationships between the health benefits and the fatty acid content has been hampered by the unavailability of labor-effective high-throughput technologies. An automated high throughput fatty acid analysis was developed from a previous procedure based on ...
Watson Mary Katherine - - 2012
Ester quaternary ammonium compounds (esterquats), which are mainly used as active ingredients in fabric softeners and personal care products, are beginning to replace traditional quaternary ammonium compounds. As a result of hydrophobicity and increasing use, esterquats reach anaerobic treatment systems. However, little is known about the fate of esterquats under ...
Tofalo Rosanna - - 2012
Six naturally fermented (Greek-style) table olives of cultivars Itrana, Peranzana, Cellina di Nardò, Nocellara del Belice and Bella di Cerignola, as well as their corresponding brines, were studied by a combined strategy consisting of chemical, microbiological and molecular analyses. In particular, organic acids, sugars, polyphenols, fatty acids, biogenic amines and ...
Himanen Marina - - 2012
Presence of low-weight carboxylic acids (LWCAs) can be the reason for phytotoxicity of green manures, treated bio-waste or digestates from biogas production applied to soils. As the phytotoxic concentrations of LWCA are poorly known, this work presents data on six acids (C(1)C(6): formic, acetic, propionic, butyric, valeric, and caproic). Phytotoxicity ...
Liu Jianke - - 2012
Formic acid is the main breakdown product of mild hydrothermal treatment of carbohydrates. Further conversion to methanol was achieved using Cu as catalyst and Zn as reductant under hydrothermal conditions of 250-325°C for 3-12h. Both Cu and Zn used were commercial Cu and Zn powders with particle sizes of 200mesh. ...
Ge Ri-Li - - 2012
Recent studies have identified genes involved in high-altitude adaptation in Tibetans. Genetic variants/haplotypes within regions containing three of these genes (EPAS1, EGLN1, and PPARA) are associated with relatively decreased hemoglobin levels observed in Tibetans at high altitude, providing corroborative evidence for genetic adaptation to this extreme environment. The mechanisms that ...
Karlsson Isabella - - 2012
Octocrylene is an organic UV-filter, commonly used in sunscreens and cosmetics, which can give rise to both contact and photocontact allergy. Our aim was to investigate octocrylene's interaction with amino acid analogs in the presence of UV-radiation to better understand the reason for octocrylene's photoallergenic capacity. The amino acid analogs ...
R Martínez-Moreno - - 2012
Nitrogen limitation is one of the most common causes for stuck or sluggish fermentation. A broad range of values has been reported as the minimum nitrogen concentration necessary for the completion of alcoholic fermentation. We have analyzed the minimum nitrogen concentration required to yield the maximum biomass (nitrogen reference value) ...
Takahashi Tetsuya - - 2012
Collagen sheets were used in a unique evaluation method to examine skin damage caused by ultraviolet (UV) light of short wavelength during a season of the Antarctic ozone hole. The collagen sheets were exposed outdoors for 25 and 50 d, in the spring when the ozone hole was formed and ...
Shinji Junpei - - 2012
The penaeid prawn, Litopenaeus vannamei, was employed to investigate intracellular isosmotic regulation in situations where invertebrates encounter hyposmosis. Hemolymph osmolality was first analyzed to confirm osmoregulatory conditions in the experimental animals, followed by analysis of amino acids in muscle and hemolymph using high-performance liquid chromatography. Total muscle amino acid levels ...
Gunasekara Dulan B DB Department of Chemistry, University of Kansas, Lawrence, KS 66045, - - 2012
Microchip electrophoresis (ME) with electrochemical detection was used to monitor nitric oxide (NO) production from diethylammonium (Z)-1-(N,N-diethylamino)diazen-1-ium-1,2-diolate (DEA/NO) and 1-(hydroxyl-NNO-azoxy)-L-proline disodium salt (PROLI/NO). NO was generated through acid hydrolysis of these NONOate salts. The products of acid hydrolysis were introduced into a 5-cm separation channel using gated injection. The separation ...
Yng Lian Poh - - 2012
The antimicrobial effects of the American cranberry (Vaccinium macrocarpon) on a major food-borne pathogen, Staphylococcus aureus, were investigated using commercially obtained Lakewood® organic cranberry juice and Ocean Spray® cranberry juice cocktail and four other berry fruit extracts (acai berry, strawberry, raspberry, and blueberry). The results showed that cranberry is a ...
Iwamura Munetaka - - 2012
[Eu(bda)(2)](-) (bda = 2,2'-bipyridine-6,6'-dicarboxylic acid) produces intense circularly polarized luminescence (CPL) in aqueous solutions in the presence of (S)-2-pyrrolidone-5-carboxylic acid upon UV irradiation, although the molecular structure of the europium(III) complex is achiral. The mechanism for the induction of CPL was preliminarily attributed to distortions induced by association with an ...
Gaillard C - - 2012
We have studied the extraction of four HA acids (HNO(3), HReO(4), HClO(4), HCl) to a hydrophobic ionic liquid (IL) 1-butyl-3-methylimidazolium-bis(trifluoromethanesulfonyl)amide (BMI(+) Tf(2)N(-)) at room temperature, in a wide range of acidic concentrations in water. The effect of tributylphosphate (TBP) as co-solvent is investigated. According to experimental observations, water dragging to ...
Farrell Brendan P - - 2012
Dispersed silver/palladium (Ag/Pd) nanoplatelets were prepared by delivering in parallel solutions of mixed metal nitrates and L-ascorbic acid into a nitric acid solution containing Arabic gum. The shape and size of bimetallic nanoparticles varied with the silver/palladium weight ratio and the concentration of nitric acid. The optimum conditions for platelets ...
Suksabye Parinda - - 2012
Coir pith samples were chemically modified by grafting with acrylic acid for the removal of Cr(VI) from electroplating wastewater. The presence of acrylic acid on the coir pith surface was verified by a scanning electron microscope with an electron dispersive x-ray spectrometer (SEM/EDX), Fourier transform infrared spectroscopy (FTIR) and thermogravimetry ...
Chen Jian - - 2012
BACKGROUND: Ants often compete with other ants for resources. Although formic acid is a common defensive chemical of formicine ants, it does not occur in any other subfamilies in Formicidae. No information on toxicity of formic acid to red imported fire ants, Solenopsis invicta, is available. This study examined its ...
Zhao Wenwen - - 2012
A novel chromo- and fluorogenic sensor, 4-(4-dimethylaminostyryl)-1-hexadecylpyridinium (DSHP) for lysophosphatidic acid (LPA) was successfully developed by incorporating a long alkyl chain into the cyanine molecule. DSHP shows excellent selectivity and high sensitivity towards LPA with a detection limit of about 7.09 × 10(-7) M based on electrostatic and hydrophobic interactions ...
Vitaglione Paola - - 2012
Human bioavailability of curcumin from breads enriched with 1 g/portion of free curcumin (FCB), encapsulated curcumin (ECB) or encapsulated curcumin plus other polyphenols (ECBB), was evaluated. Parental and metabolized curcuminoids and phenolic acids were quantified by HPLC/MS/MS in blood, urine and feces collected over 24h. The concentrations of serum curcuminoids ...
Szopa Agnieszka - - 2012
The contents of free phenolic acids and cinnamic acid were determined using an HPLC method in methanolic extracts from biomass of Schisandra chinensis (Turcz.) Baill. (Chinese magnolia vine) at different stages of organogenesis, cultured in vitro on a few variants of Murashige and Skoog (MS) medium, containing different concentrations of ...
< 3 4 5 6 7 8 9 10 11 12 13 >