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Cosmulescu Sina - - 2013
Abstract Context: Walnut [Juglans regia L. (Juglandaceae)] is a rich source of phenolic compounds, including phenolic acids, naphtoquinones and flavonoids. The increasing interest in the powerful biological activities of plant phenolics has outlined the necessity of determining their content in leaves of different walnut cultivars. Objective: In this study, walnut ...
Hata Kazuhiro - - 2013
A highly diastereoselective synthesis of 2-aryl-3-acyloxy-2,3-dihydrobenzofurans by palladium-catalyzed acyloxyarylation involving dearomatization of benzofurans with arylboronic acids and carboxylic acids occurring under mild conditions has been developed.
Wang Xue-Mei XM College of Agronomy and Biotechnology, Yunnan Agricultural University, 650201 Kunming, - - 2014
In China, many species of edible wild-grown mushrooms are appreciated as food and also found use in traditional Chinese medicine. In this mini-review, for the first time, is summarized and discussed data available on chemical components of nutritional significance for wild-grown mushrooms collected from China. We aimed to update and ...
Liu Xiaoyu - - 2013
Certain perfluorinated chemicals (PFCs) in consumer products used indoors are potential indoor PFCs sources and have been associated with developmental toxicity and other adverse health effects in laboratory animals (Lao et al., 2007). The concentrations of selected PFCs including perfluorooctanoic acid (PFOA) and other perfluorocarboxylic acids (PFCAs), in 35 selected ...
North E Jeffrey - - 2013
Mycolic acids are the major lipid component of the unique mycobacterial cell wall responsible for the protection of the tuberculosis bacilli from many outside threats. Mycolic acids are synthesized in the cytoplasm and transported to the outer membrane as trehalose-containing glycolipids before being esterified to the arabinogalactan portion of the ...
Adcock Jacqui L JL Centre for Chemistry and Biotechnology, Faculty of Science, Engineering and Built Environment, Deakin University, Waurn Ponds, Victoria 3216, - - 2014
We review the analytical applications of acidic potassium permanganate chemiluminescence published since our previous comprehensive review in mid-2007 to early 2013. This includes a critical evaluation of evidence for the emitting species, the influence of additives such as polyphosphates, formaldehyde, sulfite, thiosulfate, lanthanide complexes and nanoparticles, the development of a ...
Mišurcová L L Department of Food Analysis and Chemistry, Faculty of Technology, Tomas Bata University in Zlín, nám. T.G. Masaryka 5555, 760 01 Zlín, Czech Republic. Electronic address: - - 2014
In this paper, the amino acid profiles of algal products from diverse groups (Cyanophyceae, Chlorophyta, Rhodophyta and Phaeophyta) were established. Contents of essential and non-essential amino acids varied in the range of 22.8-42.3 and 31.0-66.5 (g·16g(-1)N), respectively. In dependence on daily algal intakes, the highest participation in recommended daily intakes ...
Song Chunxia - - 2013
Global quantification of the single amino acid variations (SAAVs) is essential to investigate the roles of SAAVs in disease progression. However, few efforts have been made on this issue due to the lack of high throughput approach. Here, we presented a strategy by integration of the stable isotope dimethyl labeling ...
Brimioulle R - - 2013
Asymmetric catalysis of photochemical cycloadditions has been limited by the challenge of suppressing the unselective background reaction. Here, we report that the high cross-section ππ* transition of 5,6-dihydro-4-pyridones, a versatile class of enone substrates, undergoes a >50 nanometer (nm) bathochromic absorption shift upon Lewis acid coordination. Based on this observation, ...
Contino Annalinda - - 2013
Stereoselective amino acid analysis has increasingly moved into the scope of interest of the scientific community. In this work, we report a study on the chiral recognition of D,L-Trp and D,L-His using L-Cys-capped gold nanoparticles (AuNPs) and copper(II) ion. In the L-Cys-capped AuNPs, the thiol group of the amino acid ...
Satoh Kotaro - - 2013
Bio-based polymer materials from renewable resources have recently become a growing research focus. Herein, a novel thermoplastic elastomer is developed via controlled/living radical polymerization of plant-derived itaconic acid derivatives, which are some of the most abundant renewable acrylic monomers obtained via the fermentation of starch. The reversible addition-fragmentation chain-transfer (RAFT) ...
Liu Kan - - 2013
Higher alcohols such as n-butanol and n-hexanol have higher energy density than ethanol, are more compatible with current fuel infrastructure, and can be upgraded to jet and diesel fuels. Several organisms are known to convert syngas to ethanol, but very few can produce higher alcohols alone. As a potential solution, ...
Espiritu Michael J - - 2013
Bioactive peptides from Conus venom contain a natural abundance of post-translational modifications that affect their chemical diversity, structural stability, and neuroactive properties. These modifications have continually presented hurdles in their identification and characterization. Early endeavors in their analysis relied on classical biochemical techniques that have led to the progressive development ...
Dulcey Carlos Eduardo - - 2013
Groups of pathogenic bacteria use diffusible signals to regulate their virulence in a concerted manner. Pseudomonas aeruginosa uses 4-hydroxy-2-alkylquinolines (HAQs), including 4-hydroxy-2-heptylquinoline (HHQ) and 3,4-dihydroxy-2-heptylquinoline (PQS), as unique signals. We demonstrate that octanoic acid is directly incorporated into HHQ. This finding rules out the long-standing hypothesis that 3-ketofatty acids are ...
Momeni-Isfahani Tahereh - - 2013
The combination of soft- and hard-modeling was used to the spectrophotometric studies of the acidity constants of 2-(2-Thiazolylazo)-Cresol (TAC) at 25°C and at ionic strength 0.1molL(-1) in pure water as well as in aqueous media containing variable percentages (10-50%) of organic solvents. The organic solvents used were methanol, ethanol, dimethyl ...
Chen Rui - - 2013
Here we present a synthetic route for solid phase synthesis of N-linked glycoconjugates containing high mannose oligosaccharides which allows the incorporation of useful functional handles on the N-terminus of asparagine. In this strategy, the C-terminus of an Fmoc protected aspartic acid residue is first attached to a solid phase support. ...
Cibulková Zuzana Z Department of Physical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovak Republic. Electronic address: - - 2014
Papaver somniferum L. is an important crop cultivated mostly for seed production. Poppy seeds have a high nutritive value and are used as a food and as a source of edible oil. This oil is a rich source of polyunsaturated fatty acids. It is well known that the unsaturated fatty ...
Nowak Verena V FAO, Rome, ESN, Viale delle Terme di Caracalla 1, 00153 Rome, Italy. Electronic address: - - 2014
Different approaches for converting fatty acid (FA) data in fish and shellfish expressed as weight percent of total FA or of total lipid content (TL) to per 100g edible portion fresh weight (EP) are used. FAO/INFOODS studied on a dataset of 668 fish and shellfish firstly the impact on their ...
Jeoung Nam Ho - - 2013
Pyruvate is an obligatory intermediate in the oxidative disposal of glucose and a major precursor for the synthesis of glucose, glycerol, fatty acids, and non-essential amino acids. Stringent control of the fate of pyruvate is critically important for cellular homeostasis. The regulatory mechanisms for its metabolism are therefore of great ...
Cachia David - - 2013
Organic acidurias are an important group of inherited metabolic disorders that affect the intermediary metabolic pathways of carbohydrate, amino acid, and fatty acid oxidation, leading to the accumulation of organic acids.(1) The 2-hydroxyglutaric acidurias are rare neurometabolic disorders characterized by developmental delay with or without other neurologic dysfunction. Three different ...
Beisel Tamara - - 2013
A Lewis acid palladium-catalyzed reaction of amides, aryl aldehydes, and arylboronic acids is described. This new method allows for a practical and general synthesis of α-substituted amides from simple, readily available building blocks.
Xie Shuifen - - 2013
This paper describes the first synthesis of Rh tetrahedrons with concave side faces by collectively manipulating the reaction kinetics, facet-selective capping, and surface diffusion of atoms. Specifically, a combination of triethylene glycol (as a reducing agent), L-ascorbic acid (as a coordination ligand), and citric acid (as a capping agent) provides ...
Wu Guangyu - - 2013
Obesity is considered to be a chronic inflammatory state in which the dysfunction of adipose tissue plays a central role. The adipokines, which are cytokines secreted by adipose tissue, are key links between obesity and related diseases such as metabolic syndrome (MetS) and atherosclerosis. Lipocalin-2 (LCN2) and adipocyte fatty acid ...
Bhargava Seema - - 2013
Although normally folic acid is given during pregnancy, presumably to prevent neural tube defects, the mechanisms of this protection are unknown. More importantly it is unclear whether folic acid has other function during development. It is known that folic acid re-methylates homocysteine (Hcy) to methionine by methylene tetrahydrofolate reductase-dependent pathways. ...
Yu Xuejing - - 2013
Branched-chain amino acid aminotransferase (BCAT) plays a key role in biosynthesis of hydrophobic amino acids (such as leucine, isoleucine, and valine) and its substrate spectrum has not been fully explored or exploited owing to the inescapable restrictions of previous assays, which were mainly based on following the formation/consumption of the ...
Jacob R H - - 2013
This paper integrates the key industry findings from the twelve preceding papers in this special edition of Meat science. In so doing, various animal factors important for the quality of Australian lamb meat are highlighted for sensory, visual appeal and human health attributes. Intramuscular fat concentration (IMF) was found to ...
Javidpour Pouya - - 2013
Major efforts in bioenergy research have focused on producing fuels that can directly replace petroleum-derived gasoline and diesel fuel through metabolic engineering of microbial fatty acid biosynthetic pathways. Typically, growth and pathway induction are conducted under aerobic conditions, but for operational efficiency in an industrial context, anaerobic culture conditions would ...
Ying Yi-Lun - - 2013
Nanopore-based techniques, which mimic the functions of natural ion channels, have attracted increasing attention as unique methods for single-molecule detection. The technology allows the real-time, selective, high-throughput analysis of nucleic acids through both biological and solid-state nanopores. In this Minireview, the background and latest progress in nanopore-based sequencing and detection ...
Min Chang C Department of Chemistry and Chemical Biology, Rutgers, The State university of New Jersey, Piscataway, NJ 08854 (USA) - - 2013
Caught in the act: A new concept for asymmetric Brønsted acid catalysis is presented. Compounds containing an acidic functionality in addition to an anion recognition site act as powerful conjugate-base-stabilized Brønsted acid catalysts. This strategy was applied to the first catalytic enantioselective three-component Povarov reaction of indoline and other secondary ...
Denmark Scott E SE Department of Chemistry, University of Illinois, Urbana-Champaign, Urbana, IL, - - 2013
The development of a binary catalyst system for bromocycloetherification, consisting of an achiral Lewis base and a chiral Brønsted acid, is described in detail. The results of preliminary kinetic studies are also presented. Chirality 00:000-000, 2013. © 2013 Wiley Periodicals, Inc.
Esclapez J - - 2013
The haloarchaeon Haloferax mediterranei is able to grow in a defined culture media not only in the presence of inorganic nitrogen salt but also with amino acid as the sole nitrogen source. Assimilatory nitrate and nitrite reductases respectively catalyze the first and second reactions,. The genes involved in this process ...
Filee Romain - - 2013
Background: Nowadays, the most conventional method to quantify physiological amino acids consists in ion exchange chromatography (IEC) followed by post-column ninhydrin derivatization and UV detection at two wavelengths. Unfortunately, the technique presents some drawbacks such as long run time, large sample volume, and specific costs associated to the maintenance of ...
Lepping Miles D - - 2013
Soybeans from transgenic event DAS-444Ø6-6 are the first to express three proteins that provide tolerance to broad-spectrum herbicides. DAS-444Ø6-6 soybean expresses the aryloxyalkanoate dioxygenase-12 (AAD-12) enzyme from the soil bacterium Delftia acidovorans , which provides tolerance to the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D); the double-mutant 5-enolpyruvylshikimate-3-phosphate synthase (2mEPSPS) enzyme encoded by ...
Harrigan George G - - 2013
This paper reports an assessment of seed biochemical and metabolite variability and diversity in a series of nine soybean varieties; all lines share the same genetic lineage but represent ∼35 years of breeding (launch years 1972-2008) and differing yield potentials. These varieties, including six conventional and three glyphosate-tolerant lines, were ...
Singjunla Yuttapong - - 2013
A straightforward metal-free synthesis of anti-β-hydroxy-α-amino acids is described. The organic base-mediated decarboxylative aldol reaction of cheap, readily available α-amidohemimalonates with various aldehydes afforded under very mild conditions anti-β-hydroxy-α-amido esters in high yields and complete diastereoselectivity. Simple one-pot subsequent transformations enabled the corresponding anti-β-hydroxy-α-amino acids or in a few examples ...
Manios Stavros G - - 2013
The spoilage pattern of three emulsified, vegetable-based spreads of low pH (3.90-4.15) adjusted with acetic acid was characterized by correlating the growth of spoilage flora with the organoleptic and physicochemical changes, as well as the changes in the species composition of the dominant microflora during storage under isothermal conditions. In ...
Megías-Pérez Roberto R Instituto de Investigación en Ciencias de la Alimentación (CIAL), (CSIC-UAM), CEI (UAM+CSIC), Nicolás Cabrera, 9, 28049 Madrid, - - 2014
Physical and chemical quality parameters (dry matter, aw, protein, carbohydrates, vitamin C, 2-furoylmethyl amino acids, rehydration ratio and leaching loss) have been determined in 30 commercial dehydrated fruits (strawberry, blueberry, raspberry, cranberry, cherry, apple, grapefruit, mango, kiwifruit, pineapple, melon, coconut, banana and papaya). For comparison purposes, strawberry samples processed in ...
Stutts Whitney L - - 2013
Phospholipid oxidation has been implicated in the pathogenesis and progression of numerous age-related and neurodegenerative diseases. Despite these implications, this broad class of biomolecules remains poorly characterized. In this work, the fragmentation patterns of [M+H]+ and [M+Na]+ ions of intact phosphatidylcholine oxidation products (OxPCs) were characterized by matrix-assisted laser desorption/ionization ...
Li Li - - 2013
The concentration of tyrosine,the ratio of branch-amino acid to the aromatic amino acid in phenylketonuria (PKU) patients are much lower than that of normal people, which reveal that PKU patients have amino acid metabolism disorder. To investigate the arginine level in blood, the expression of argininosuccinate synthetase (ASS), the rate-limiting ...
El-Boulifi Noureddin N Department of Chemical Engineering, Faculty of Chemistry, University of Complutense, 28040 Madrid, - - 2014
The aim of this work was the synthesis of a novel hydroxyl-fatty acid derivative of kojic acid rich in kojic acid monoricinoleate (KMR) which can be widely used in the cosmetic and food industry. The synthesis of KMR was carried out by lipase-catalysed esterification of ricinoleic and kojic acids in ...
Greenberg Steven A - - 2013
Inclusion body myositis (IBM) is a poorly understood autoimmune and degenerative disorder of skeletal muscle. Here, pathophysiological and diagnostic biomarkers of IBM are reviewed. Muscle histopathological biomarkers have been successful in stimulating the study of IBM pathophysiology for over three decades. Their use as diagnostic biomarkers, in contrast, has significant ...
Wang Mingxuan - - 2013
The biosynthesis of very-long-chain polyunsaturated fatty acids involves an alternating process of fatty acid desaturation and elongation catalyzed by complex series of enzymes. ω3 desaturase plays an important role in converting ω6 fatty acids into ω3 fatty acids. Genes for this desaturase have been identified and characterized in a wide ...
Khanal Manakamana - - 2013
Phenylboronic acid-modified nanoparticles (NPs) are attracting considerable attention for biological and biomedical applications. We describe here a convenient and general protocol for attaching multiple copies of para-substituted phenylboronic acid moieties onto either iron oxide-, silica- or diamond-derived nanoparticles (NPs). The boronic acid functionalized NPs are all fabricated by first modifying ...
Moore Jared T - - 2013
A concise synthesis of homocitric acid lactone was developed to accommodate systematic placement of carbon isotopes (specifically (13)C) for detailed studies of this cofactor. This new route uses a chiral allylic alcohol, available in multigram quantities from enzymatic resolution, as a starting material, which transposes asymmetry through an Ireland-Claisen rearrangement.
Saqib Muhammad - - 2013
In recent years, much attention has been focused on the antioxidant potential of different phenolic acids. But still no theoretical investigation is reported on the antioxidant potential of Homogentisic and Orsellinic acids. In this study, computational investigation based on the density functional theory (DFT) has been carried out to understand ...
Harris William S - - 2013
The omega-3 fatty acids (FA) found in fish oils, eicosapentaenoic and docosahexaenoic acids (EPA and DHA, respectively), have been extensively studied therapeutically in a wide variety of disease conditions, but in none more than cardiovascular disease (CVD). Our review summarizes mechanisms of action, recent meta-analyses of CVD outcome trials, sources ...
Radulović Niko S - - 2013
The essential oils obtained by hydrodistillation of Geranium purpureum and G. phaeum were characterized by GC-FID and GC/MS analyses (the former for the first time in general). In total, 154 constituents were identified, accounting for 89.0-95.8% of the detected GC peak areas. The investigated essential oils consisted mainly of fatty ...
Pierson Jean T - - 2014
In this study we determined the qualitative composition and distribution of phytochemicals in peel and flesh of fruits from four different varieties of mango using mass spectrometry profiling following fractionation of methanol extracts by preparative HPLC. Gallic acid substituted compounds, of diverse core structure, were characteristic of the phytochemicals extracted ...
Datta Shubhashis - - 2013
Supramolecular and bio-supramolecular host assisted pKa shift of biologically relevant acidic guests, warfarin and coumarin 343, has been monitored using both steady-state and time resolved fluorescence spectroscopy. The anion receptors present in sub-domain IIA of human serum albumin (HSA) stabilize the anionic form of the guest and thereby shift pKa ...
Bradberry J Chris - - 2013
The triglyceride (TG)-lowering benefits of the very-long-chain omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are well documented. Available as prescription formulations and dietary supplements, EPA and DHA are recommended by the American Heart Association for patients with coronary heart disease and hypertriglyceridemia. Dietary supplements are not subject ...
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