Search Results
Results 101 - 150 of 2693
1 2 3 4 5 6 7 8 9 10 >
Bao Jiangyin J Department of Chemistry, Michigan State University, East Lansing, MI, 48824, - - 2014
Oxidized fatty acids, and particularly cyclopentenone oxylipins, are electrophilic metabolites that play diverse physiological roles. Current understanding is limited regarding how ion fragmentation provides essential information about oxylipin structures. In this work, unusual products of the collisional activation of deprotonated cyclopentenone oxylipins were investigated. The cyclopentenone oxylipin 12-oxo-phytodienoic acid (OPDA) ...
Uri Csilla C Agricultural Biotechnology Center, P.O. Box 411, H-2101 Gödöllő, - - 2014
Using gas chromatography-mass spectrometry (GC-MS) as a system for the detection of amino acids, organic acids, sugars, sugar alcohols, and fatty acids, we characterised six commercial potato cultivars (Hópehely, Katica, Lorett, Somogyi kifli, Vénusz Gold, and White Lady) with different pedigrees, starch contents, cooking types, and dormancy periods, in five ...
Frommherz Lara L Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Safety and Quality of Fruit and Vegetables, Haid-und-Neu-Straße 9, 76131 Karlsruhe, Germany. Electronic address: - - 2014
Folic acid (FA) concentrations of nine fortified vitamin juices were determined with the aim to study the FA degradation and to investigate the deviation from the declared label value. The juices were received shortly after bottling and were analyzed monthly during controlled storage conditions (light and dark) over one year. ...
He Xiao-Song XS State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China, - - 2014
Compost leachates were collected to investigate the influence of the composition and removal of volatile fatty acids (VFAs), humic-like substances (HSs), and dissolved organic nitrogen (DON) on heavy metal distribution during the leachate treatment process. The results showed that acetic and propionic acids accounted for 81.3 to 93.84 % of VFAs, ...
Yu Linkai L Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University , 5180 Kurokawa, Imizu, Toyama 939-0398, - - 2014
Campechic acids A (1) and B (2), two new polyketides, were isolated from the culture extract of Streptomyces sp., and their structures were determined by NMR and MS spectroscopic analysis. Campechic acids are polyether-polyketides functionalized by two tetrahydrofuran rings, an enolized 1,3-diketone, and multiple methyl substitutions. Absolute configuration of nine ...
Müller Daniel C DC Analytisch-Biologisches Forschungslabor (ABF) GmbH, Goethestraße 20, D-80336Munich, Germany; Institute of Hydrochemistry and Chair for Analytical Chemistry, Technische Universität München, Marchioninistraße 17, D-81377 Munich, Germany. Electronic address: - - 2014
Mass spectrometry is an ideal tool for investigations of the metabolome in human plasma. To investigate the impact of smoking on the human metabolome, we performed an untargeted metabolic fingerprinting using GC-TOF-MS with EDTA-plasma samples from 25 smokers and 25 non-smokers. The observed elevated levels in the monounsaturated fatty acids ...
Kıvrak Ibrahim I Muğla Sıtkı Koçman University, Research Laboratory Center, MGL Food Analysis Laboratory, Kötekli, 48000 Muğla, Turkey. Electronic address: - - 2014
Wild edible and medicinal mushroom, Calvatia gigantea, was quantitatively analyzed for the determination of its free amino acids using ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The concentrations of total free amino acids, essential and non-essential amino acids were 199.65mg/100g, 113.69mg/100g, and 85.96mg/100g in C. gigantea, respectively. This study showed ...
Khan Mohammed Ayub MA Defence Food Research Laboratory, Siddarthanagar, Mysore, 570 011 - - 2014
Convenient, ready-to consume thermally processed potato stuffed parothas retaining their natural sensory attributes have been developed. Response Surface Methodology was used to optimize the Stuffing: dough ratio along with other ingredients. Optimized Stuffed parothas were packed in indigenously developed retortable pouches and processed in a steam-air retort. The time-temperature history ...
Kuwabara Tomohiro T Laboratory of Analytical and Bio-Analytical Chemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, - - 2014
Mass spectrometry has become a popular analytical tool because of its high sensitivity and specificity. The use of a chiral derivatization reagent for the mass spectrometry (MS) detection seems to be efficient for the enantiomeric separation of racemates. However, the number of chiral reagents for the liquid chromatography (LC)-MS/MS analysis ...
Liu Juanjuan J Chongqing Engineering Research Center for Fungal Insecticides, School of Life Science, Chongqing University, Chongqing, 400030, - - 2014
Based on transcriptome library, an NADH: flavinoxidore ductase/NADH oxidase gene (Nox) was cloned from Nomuraea rileyi. The 1,663-bp full-length cDNA contains an open reading frame of 1,233 bp coding 410 amino acids. The expression level of Nox was up-regulated and co-related to the intracellular H2O2 concentration during microsclerotium (MS) initiation. Rotenone ...
Peng Jixing J Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China , Qingdao 266003, People's Republic of - - 2014
Two novel sorbicillinoids combining a bicyclo[2.2.2]octane with a 2-methoxyphenol moiety, named sorbicatechols A (1) and B (2), were isolated from the culture of the marine sediment-derived fungus Penicillium chrysogenum PJX-17, together with the known protocatechuic acid methyl ester and caffeic acid methyl ester (3). Their structures, including absolute configurations, were ...
Saini R K RK Plant Cell Biotechnology Department, CSIR-Central Food Technological Research Institute, Mysore, 570 020 - - 2014
Fresh leaves of M. oleifera plants were analysed for nutritionally important phytoconstituents and feasible commercially used dehydration method were evaluated to preserve these in dehydrated leaves. Trans-lutein, trans-β-carotene and trans-zeaxanthin were found as the major carotenoids in fresh leaves, accounting for 36.9, 18.2 and 5.5 mg/100 g FW, respectively. Similarly, high amounts ...
Knittelfelder Oskar L OL Institute of Molecular Biosciences, University of Graz, Humboldtstraße 50/II, 8010 Graz, - - 2014
A new UPLC-based untargeted lipidomic approach using a qTOF hybrid mass spectrometer is introduced. The applied binary gradient enables separations of lipid species including constitutional isomeric compounds and low abundant lipid classes such as phosphatidic acid (PA). Addition of phosphoric acid to the solvents improves peak shapes for acidic phospholipids. ...
Struys Eduard A EA Metabolic Unit, Clinical Chemistry, VUmc Medical Center, The Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands, - - 2014
We have conducted biochemical studies with commercial available pyrroline-5-carboxylate (P5C) reductase (PYCR1) to investigate whether this enzyme plays a role in L-lysine degradation. Our recent studies with antiquitin/ALDH7A1 deficient fibroblasts revealed an alternative genesis of L-pipecolic acid, and we then hypothesized that PYCR1 was responsible for the conversion of Δ(1)-piperideine-6-carboxylate ...
Trettin Arne A Institute of Clinical Pharmacology, Hannover Medical School, 30623 Hannover, - - 2014
Oleic acid (cis-9,10-octadecenoic acid) is the most abundant monounsaturated fatty acid in human blood. Peroxynitrite (ONOO(-)) is a short-lived species formed from the reaction of nitric oxide (NO) and superoxide (O2(-)). Peroxynitrite is a potent oxidizing and moderate nitrating agent. We investigated reactions of unlabelled and deuterium labelled oleic acid ...
McNamara Robert K RK Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA. Electronic address: - - 2014
This study investigated the fatty acid composition of the postmortem superior temporal gyrus (STG), a cortical region implicated in emotional processing, from normal controls (n=15) and patients with bipolar disorder (BD, n=15), major depressive disorder (MDD, n=15), and schizophrenia (SZ, n=15). For comparative purposes, STG fatty acid composition was determined ...
Roberts Lee D LD MRC Human Nutrition Research, The Elsie Widdowson Laboratory, Cambridge, United Kingdom; Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, United - - 2014
Lipid metabolism is central to the function of white adipose tissue, with the tissue having a central role in storing triacylglycerides following feeding and releasing free fatty acids and monoacylglycerides during periods of fasting. In addition, lipid species have been suggested to play a role in lipotoxicity and as signaling ...
Kumlay Ahmet Metin AM Department of Field Crops, Faculty of Agriculture, Igdir University, 76000 Igdir, - - 2014
The study compared the effects of 1.0 × MS medium containing various concentrations of α-naphthaleneacetic acid (NAA), indole-3-acetic acid (IAA), and indole-3-butyric acid (IBA), alone or in combination with gibberellic acid (GA3) in micropropagation of three potato (Solanum tuberosum L.) cultivars Pasinler, Granola, and Caspar using binodal stem cuttings. The ...
Nakashima Akio A Biosignal Research Center, Kobe University, Kobe 657-8501, Japan - - 2014
The Tsc1-Tsc2 complex homologous to human tuberous sclerosis complex proteins governs amino acid uptake by regulating the expression and intracellular distribution of amino acid transporters in Schizosaccharomyces pombe. Here, we performed a genetic screening for molecules that are involved in amino acid uptake and found Arn1 (also known as Any1). ...
Ueberlein Susanne S Bioanalytical Chemistry, TU Dresden, Dresden 01062, Germany. - - 2014
It has been discovered during the past few years that demosponges of the order Verongida such as Aplysina cavernicola exhibit chitin-based skeletons. Verongida sponges are well known to produce bioactive brominated tyrosine derivatives. We could recently demonstrate that brominated compounds do not exclusively occur in the cellular matrix but also ...
Taheri Shahram S Department of Nephrology, Isfahan Kidney Diseases Research Center, Isfahan University of Medical Sciences, Isfahan, - - 2014
End stage renal disease (ESRD) is a condition that inflammation and oxidative stress plays an important role in damaging to tissues, especially, in the vascular system. The effect of omega-3 fatty acids is well-documented in some inflammatory diseases via eicosapentanoic acid and docosahexanoic acid components of fish oil. The aim ...
Gautam Milan M Department of Cardiovascular Medicine, Shinshu University School of Medicine, Matsumoto, Nagano, - - 2014
Importance of fatty acid components and imbalances has emerged in coronary heart disease. In this study, we analyzed fatty acids and ankle-brachial index (ABI) in a Japanese cohort. Peripheral arterial disease (PAD) was diagnosed in 101 patients by ABI ≤0.90 and/or by angiography. Traditional cardiovascular risk factors and components of ...
Niknam Mahdieh M Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, - - 2014
Atherosclerosis, with its major manifestation, coronary artery disease (CAD) is a chronic inflammatory disease. Dietary fatty acids intakes favorably effect on inflammatory responses. This study was conducted to examine the association between dietary fatty acid intakes and inflammatory markers, interleukin 6 (IL-6) and high sensitivity C-reactive protein (hs-CRP), in CAD ...
Liu Aihua A Tianjin Medical University Eye Hospital, School of Optometry and Ophthalmology, Tianjin Medical University Eye Institute, Tianjin, China - - 2014
Background Dry eye is a common, complex condition that can reduce ocular comfort and visual performance. The impact on quality of life has been rated as similar to the effect of moderate angina and, in more severe cases, dialysis and severe angina. This study aimed to use meta-analysis to compare ...
Chang Kai-Chi KC Department of Pediatrics, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, - - 2014
Gastroesophageal flap valve (GEFV) endoscopic grading is reported to be associated with gastroesophageal reflux disease (GERD) in adults; however its role in pediatric groups remains unknown. This study aimed to investigate the significance of GEFV grading and the associations to multichannel intraluminal impedance and pH monitoring (MII-pH) in children with ...
Shishehbore Masoud Reza MR Dep artment of Chemistry, Yazd Branch, Islamic Azad University, Yazd, - - 2014
In this study, a new reaction system for quantitative determination of ascorbic acid was introduced. The developed method is based on inhibitory effect of ascorbic acid on the Orange G-bromate system. The change in absorbance was followed spectrophotometrically at 478 nm. The dependence of sensitivity on the reaction variables including ...
Baierle Marília M Laboratory of Toxicology (LATOX), Department of Analysis, Pharmacy Faculty, Federal University of Rio Grande do Sul, Porto Alegre 90610000, RS, Brazil. - - 2014
Polyunsaturated fatty acids (PUFAs), especially the n-3 series, are known for their protective effects. Considering that cardiovascular diseases are risk factors for dementia, which is common at aging, the aim of this study was to evaluate whether fatty acid status in the elderly was associated with cognitive function and cardiovascular ...
Abubakari Abdul-Razak AR School of Health and Life Sciences, Glasgow Caledonian University, London, - - 2014
As longevity increases, so does the global prevalence of cognitive dysfunction. Numerous lifestyle and/or dietary interventions such as omega-3 fatty acids have been suggested to improve memory. Therefore, this study examined the consistency and strength of the impact of supplementation of omega-3 fatty acids on overall cognitive function using systematic ...
Lewis Martin M Bristol Heart Institute, University of Bristol, Bristol, - - 2014
Free intracellular taurine and principal α-amino acids (glutamate, glutamine, aspartate, asparagine and alanine) are abundant in human heart. They are cellular regulators and their concentration can change in response to disease and cardiac insults and have been shown to differ between hypertrophic left ventricle (LV) and the relatively "normal" right ...
Sorensen Lone S LS Department of Surgical Gastroenterology, Aalborg University Hospital, 9000 Aalborg, Denmark. - - 2014
Omega-3 fatty acids (n-3 FA) may have beneficial clinical and immune-modulating effects in surgical patients. In a randomized, double-blind, prospective, placebo-controlled trial, 148 patients referred for elective colorectal cancer surgery received an n-3 FA-enriched oral nutritional supplement (ONS) providing 2.0 g of eicosapentaenoic acid (EPA) and 1.0 g of docosahexaenoic ...
Yalcinbayir Ozgur O Department of Ophthalmology. Uludag University School of Medicine, Bursa, - - 2014
To study the concentrations of amino acids and vascular endothelial growth factor (VEGF) in subretinal fluid (SRF) of cases with rhegmatogenous retinal detachment (RRD). The relevance of the results with postoperative anatomic and functional success in RRD was investigated. Fifty-three patients were included in this prospective study. The study group ...
Sobhnamayan Fereshte F Department of Endodontics, Dental School, Shiraz University of Medical Sciences, Shiraz, - - 2014
This laboratory study was performed to evaluate the effect of different acidic pH values on the push-out bond strength of calcium-enriched mixture (CEM) cement. Forty-eight root dentin slices were obtained from freshly extracted single rooted human teeth and their lumen were instrumented to achieve a diameter of 1.3 mm. Then, ...
Kazubek-Zemke Maja M Department of Toxicology, Wrocław Medical University,Wrocław, - - 2014
The early diagnosis of the nephrotoxic effect of xenobiotics and drugs is still an unsolved problem. Recent studies suggest a correlation between the nephrotoxic activity of xenobiotics and increased concentration of amino acids in urine. The presented study was focused on the application of GLC-MS method for amino acids profiling ...
Woodcock Steven R SR Department of Pharmacology and Chemical Biology, University of Pittsburgh . Pittsburgh, Pennsylvania 15261, United - - 2013
Nitro-conjugated linoleic acids (NO2-cLA), endogenous nitrodiene lipids which act as inflammatory signaling mediators, were isolated and single isomers purified from the biomimetic acidic nitration products of conjugated linoleic acid (CLA). Structures were elucidated by means of detailed NMR and HPLC-MS/MS spectroscopic analysis and the relative double bond configurations assigned. Additional ...
Kenny O O Department of Food Biosciences, Teagasc Food Research Centre, Ashtown, Dublin 15, Ireland; Conway Institute of Biomolecular and Biomedical Research, UCD, Belfield, Dublin 4, Ireland. Electronic address: - - 2013
The combination of hyphenated techniques, LC-SPE-NMR and LC-MS, to isolate and identify minor isomeric compounds from an ethyl acetate fraction of Taraxacum officinale root was employed in this study. Two distinct fractions of 4-hydroxyphenylacetic acid derivatives of inositol were isolated and characterised by spectroscopic methods. The (1)H NMR spectra and ...
Sánchez-Hernández Laura L Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Biology, Environmental Sciences and Chemistry, University of Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871, Alcalá de Henares (Madrid), - - 2013
The potential of the antibiotic vancomycin as chiral selector for the enantiomeric separation of amino acids by capillary electrophoresis with electrospray ionization tandem mass spectrometry (CE-ESI-MS(2) ) was investigated for the first time in this work. Derivatization of amino acids with FMOC-Cl was carried out to enable their interaction with ...
Zhang Jinghuan - - 2013
Sorption and desorption of phenanthrene (PHE) onto black carbon (BC) extracted from sediments were studied in the presence of three types of dissolved organic matter (DOM), including L-phenylalanine (L-PH), peptone and citric acid. The nonlinearity of the sorption isotherms increased in the presence of DOM. The presence of L-PH reduced ...
López-Molina Rubén R Unidad de Investigación en Diabetes y Riesgo Cardiovascular, Instituto Nacional de Salud Pública, - - 2013
Objective. To determine prevalence of hyperuricemia and its relation with intake of sweetened beverages (SB) and metabolic syndrome (MS) in low income urban Mexican population. Materials and methods. A cross-sectional analysis of The Mexico City Diabetes Study, a prospective population-based investigation (1 173 participants) was performed. We used logistic regression, ...
Paudel Liladhar - - 2013
Nonanthocyanin secondary metabolites potentially contributing to the antiproliferative bioactivity of black raspberry ( Rubus occidentalis L.) fruits were extracted in ethyl acetate and isolated by semipreparative and analytical HPLC and analyzed by NMR, HPLC-ESI-MS, and ESI-MS/MS techniques. Here we present complete and partial structures of a variety of the chemical ...
Hsu Wei-Hsuan - - 2013
Yellow pigments monascin (MS) and ankaflavin (AK) are secondary metabolites derived from Monascus-fermented products. The hypolipidemic and anti-inflammatory effects of MS and AK indicate that they have potential on preventing or curing nonalcoholic fatty liver disease (NAFLD). Oleic acid (OA) and high-fat diet were used to induce steatosis in FL83B ...
Kang Bo-Sik BS School of Life Science and Biotechnology, Korea University, 5-1, Anam-dong, Sungbuk-gu, Seoul 136-701, Republic of - - 2014
A commercial electronic tongue was used to discriminate Korean rice wines (makgeolli) brewed from nine cultivars of rice with different amino acid and fatty acid compositions. The E-tongue was applied to establish prediction models with sensory evaluation or LC-MS/MS by partial least squares regression (PLSR). All makgeollis were classified into ...
Amikura Kazuaki - - 2013
A "simplified genetic code", with only 19 amino acids assigned to the sense codons, was recently developed. In this study, we describe novel simplified codes in which multiple amino acids are simultaneously excluded from the universal code. In the simplest code, tryptophan, cysteine, tyrosine, and asparagine codons are assigned to ...
Le Anthony - - 2013
The quantitation of free amino acids from physiologic samples is essential for diagnosing and monitoring patients with inherited metabolic disorders. Current methods are hindered by long preparative and/or analysis times, expensive reagents, and often suboptimal performance characteristics. To overcome these challenges, a improved method for amino acid analysis using liquid ...
Cassiano Dayse S A - - 2013
Aerial parts of Microlicia hatschbachii were extracted with hexane, and the extract was evaluated for antimicrobial activity by a broth dilution method. After phytochemical procedures: GC-MS identified aliphatic alkanes, carboxylic acids and methyl esters of long-chain fatty acids; and two diterpenoids [labd-8(17)-en-15-oic acid and labd-8(17),13-dien-15-oic acid] were identified by (1)H ...
Izzetoğlu Savaş - - 2013
Coelomocytes are considered to be immune effectors of sea urchins. Coelomocytes are the freely circulating cells in the body fluid contained in echinoderm coelom and mediate the cellular defence responses to immune challenges by phagocytosis, encapsulation, cytotoxicity and the production of antimicrobial agents. Coelomocytes have the ability to recognize self ...
Naganna Nimmashetti - - 2013
Poly(norbornene) supports comprising solubilizing ethylene glycol units and multiple amino acid attachment sites have been developed for peptide synthesis. A variety of amino acids have been efficiently loaded (0.6-1.1 mmol/g) onto the support in high yields (83-98%). Several tripeptides have been synthesized in moderate-to-good overall yields (41-66%) using only 1.2 ...
Chen Wan-Ting - - 2013
In this study, a mixed-culture algal biomass harvested from a functioning wastewater treatment system (AW) was hydrothermally converted into bio-crude oils. The highest bio-crude oil yield (49% of volatile matter) and the highest energy recovery were obtained at 300°C with 1h retention time. The highest heating value of the bio-crude ...
Zeimaran Ehsan - - 2013
In this study aliphatic polyacids were synthesized using palm acid oil (PAO) and sunflower oil (SFO) via addition reaction technique. The synthesized materials were characterized using Fourier-transform infra-red (FTIR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-ToF-MS) and thermo-gravimetric analysis (TGA). Mixing formic acid and ...
Carrillo-López Armando - - 2013
Identification of phenolic compounds was done by means of liquid chromatography (HPLC) coupled to mass spectrometry (MS) using the electrospray ionization interface (ESI). Quantification of phenolic compounds was carried out by using HPLC with diode array detector (DAD) in exocarp and mesocarp of tomato fruit at 6 different ripeness stages ...
Lin Zhiwei - - 2013
The infrared spectra of (1'S, 6'S)-1-cyclopropyl-7-(2,8-diazabicyclo[4.3.0] non-8-yl)-6-fluoro-8-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid hydrochloride salt (CLF-HCl) were studied and compared with free base. Their fragmentation pathways were investigated using tandem mass spectrometric (MS/MS) techniques on Fourier-transform ion cyclotron resonance spectrum, and many characteristic fragment ions were found.
1 2 3 4 5 6 7 8 9 10 >