Search Results
Results 501 - 550 of 4600
< 6 7 8 9 10 11 12 13 14 15 16 >
Moustafa Moustafa Sherief MS Department of Chemistry, Faculty of Science; University of Kuwait, Safat, 13060, P.O. Box 5969, - - 2014
Novel routes for the preparation of 2-amino-4H-pyran-3-carbonitrile 9, amino-arylbenzoic acid ester derivatives 13a,b, 2-aminotetrahydro-4H-chromene-3-carbonitrile 18, 3-amino-4-cyanotetrahydronaphthalene-2-carboxylic acid ester 26 and 4-amino-3,5-dicyanophthalic acid ester derivatives 37a-c were developed. The synthetic methods utilize one-pot reactions of acetylene carboxylic acid esters, α,β-unsaturated nitriles and/or active methylenenitriles in the presence of L-proline or DABCO. ...
Zhao Wei-Ming WM College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450052, China. - - 2014
A novel and efficient silver catalyzed decarboxylative direct C2-alkylation of benzothiazoles with carboxylic acids for the synthesis of 2-alkyl benzothiazoles was developed.
Rath Emma M EM Faculty of Pharmacy, University of Sydney, NSW, 2006, - - 2014
BAMLET (Bovine Alpha-lactalbumin Made LEthal to Tumours) is a member of the family of the HAMLET-like complexes, a novel class of protein-based anti-cancer complexes that incorporate oleic acid and deliver it to cancer cells. Small angle X-ray scattering (SAXS) was carried out on the complex at pH 12, examining the ...
Moens Frédéric F Research Group of Industrial Microbiology and Food Biotechnology, Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, - - 2014
Four cocoa-specific acetic acid bacteria (AAB) strains, namely Acetobacter pasteurianus 386B, Acetobacter ghanensis LMG 23848(T), Acetobacter fabarum LMG 24244(T), and Acetobacter senegalensis 108B, were analyzed kinetically and metabolically during monoculture laboratory fermentations. A cocoa pulp simulation medium (CPSM) for AAB, containing ethanol, lactic acid, and mannitol was used. All AAB ...
Mandotra S K SK Algology Laboratory, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, Uttar Pradesh 226 001, India; Department of Biological Sciences, Sam Higginbottom Institute of Agriculture, Technology and Sciences, Allahabad, Uttar Pradesh 211 007, India. Electronic address: - - 2014
Present investigation studied the potential of fresh water green microalga Scenedesmus abundans as a feedstock for biodiesel production. To study the biomass and lipid yield, the culture was grown in BBM, Modified CHU-13 and BG-11 medium. Among the tested nitrogen concentration using Modified CHU-13 medium, the highest biomass and lipid ...
Mittasch Juliane J Interdisciplinary Center for Crop Plant Research, Martin-Luther University Halle-Wittenberg, Hoher Weg 8, D-06120 Halle, - - 2014
A cDNA encoding the ester-forming hydroxybenzoic acid glucosyltransferase UGT84A13 was isolated from a cDNA library of Quercus robur swelling buds and young leaves. The enzyme displayed high sequence identity to resveratrol/hydroxycinnamate and hydroxybenzoate/hydroxycinnamate glucosyltransferases from Vitis species and clustered to the phylogenetic group L of plant glucosyltransferases, mainly involved in ...
Pavlovskaya Tatyana L TL State Scientific Institution "Institute for Single Crystals" of National Academy of Sciences of Ukraine, 60, Lenin ave., Kharkov, 61178, - - 2014
The regioselective three-component condensation of azomethine ylides derived from isatins and α-amino acids with acrylamides or aroylacrylic acids as dipolarophiles has been realized through a one-pot 1,3-dipolar cycloaddition protocol. Decarboxylation of 2'-aroyl-2-oxo-1,1',2,2',5',6',7',7a'-octahydrospiro[indole-3,3'-pyrrolizine]-1'-carboxylic acids is accompanied by cyclative rearrangement with formation of dihydropyrrolizinyl indolones.
Henstock J R JR Institute for Science and Technology in Medicine, Keele University, Stoke-on-Trent, ST4 7QB, UK, - - 2014
Silicon is an essential element for healthy bone development and supplementation with its bioavailable form (silicic acid) leads to enhancement of osteogenesis both in vivo and in vitro. Porous silicon (pSi) is a novel material with emerging applications in opto-electronics and drug delivery which dissolves to yield silicic acid as ...
Shuklov Ivan A IA Leibniz-Institut für Katalyse an der Universität Rostock e.V. Albert-Einstein-Strasse 29a, 18059 Rostock (Germany), Fax: (+49) 381-1281-5202;. - - 2014
The preparation of racemic or enantioenriched propane-1,2-diol from dilactides, oligolactides, or poly-L-lactic acid (PLLA) is described. The transformation is carried out as tandem reactions in MeOH, covering hydrolysis and subsequent hydrogenation by using copper chromite as a catalyst. The starting material present undesired side products of the PLLA synthesis or ...
Wang Hong-Min HM a Department of Natural Products Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , Shanghai 201203 , - - 2014
Four new triterpenoids, 2-O-acetyl-3-O-(4'-O-acetyl)-α-l-arabinopyranosylmaslinic acid (1), 2-O-acetyl-3-O-(3'-O-acetyl)-α-l-arabinopyranosylmaslinic acid (2), 2-O-acetyl-3-O-(3',4'-O-diacetyl)-α-l-arabinopyranosylmaslinic acid (3), and 3-O-(3'-O-acetyl)-α-l-arabinopyranosyloleanolic acid (4), together with six known triterpenoids, 3-O-(4'-O-acetyl)-α-l-arabinopyranosyloleanolic acid (5), maslinic acid (6), 2-O-acetylmaslinic acid (7), 3-O-acetylmaslinic acid (8), betulinic acid (9), and 2α-hydroxy-3β-O-acetylbetulinic acid (10), were isolated from the EtOAc extract of Garcinia hanburyi resin. ...
Lang Karsten - - 2014
Over the recent years the production of Ehrlich pathway derived chemicals was shown in a variety of hosts such as Escherichia coli, Corynebacterium glutamicum, and yeast. Exemplarily the production of isobutyric acid was demonstrated in Escherichia coli with remarkable titers and yields. However, these examples suffer from byproduct formation due ...
Sun Xiaofeng - - 2014
Supramolecular hydrogels were prepared in the mixtures of biological surfactant sodium deoxycholate (NaDC) and halide salts (NaCl and NaBr) in sodium phosphate buffer. It is very interesting that with the addition of two kinds of amino acids (L-Lysine and L-Arginine) to NaDC/NaX hydrogels, the gel becomes solution at room temperature. ...
Lee Jin-Hyung JH School of Chemical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of - - 2014
Infection by enterohemorrhagic Escherichia coli O157:H7 (EHEC) is a worldwide problem, and there is no effective therapy. Biofilm formation is closely related to EHEC infection and is also a mechanism of antimicrobial resistance. Antibiofilm screening of 560 purified phytochemicals against EHEC showed that ginkgolic acids C15:1 and C17:1 at 5μg/ml ...
Saha Rumpa R Bishnupur K.G. Engineering Institute, Bishnupur, Bankura 722122, WB, India; Department of Chemistry, The University of Burdwan, Golapbag, Burdwan 713104, WB, India. Electronic address: - - 2014
In aqueous acidic media, picolinic acid, 2,2'-bipyridine and 1,10-phenanthroline promoted Cr(VI) oxidation of 1-butanol produces 1-butanal. 1-butanal is separated from mixture by fractional distillation. The anionic surfactant (SDS) and neutral surfactant (TX-100) accelerate the process while the cationic surfactant (CPC) retards the reaction. Combination of bipy and SDS is the ...
Kevvai Kaspar K Competence Centre of Food and Fermentation Technologies, Akadeemia tee 15a, 12618, Tallinn, Estonia, - - 2014
Lactococcus lactis subsp. lactis IL1403 was grown in medium containing unlabelled free amino acids and (15)N-labelled yeast hydrolysate to gain insight into the role of peptides as a source of amino acids under conditions where free amino acids are abundant. A mathematical model was composed to estimate the fluxes of ...
Shvadchak Volodymyr V - - 2014
α-Synuclein is an 140 amino-acid protein that can switch conformation between intrinsically disordered in solution, helical on membrane, and β-sheet in amyloid fibrils. Using fluorescence of single tryptophan mutants we determined the immersion of different regions of the protein into lipid membranes. Our results suggest the presence of a flexible ...
Tamiaki Hitoshi H Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan. Electronic address: - - 2014
A chlorophyll-a derivative bonded directly with epoxide at the peripheral position of the chlorin π-system was reacted with N-urethane and C-ester protected amino acids bearing an alcoholic or phenolic hydroxy group as well as a carboxy group at the residue to give chlorophyll-amino acid conjugates. The carboxy residues of N,C-protected ...
Forrellad Marina Andrea MA Instituto de Biotecnología, CICVyA - INTA, N. Repetto and De los Reseros, Hurlingham 1686, - - 2014
Tuberculosis is one of the leading causes of mortality throughout the world. Mycobacterium tuberculosis, the causative agent of human tuberculosis, has developed several strategies involving proteins and other compounds known collectively as virulence factors to subvert human host defences and invade the human host. The Mce proteins are among these ...
Ozcan Mehmet Musa MM Department of Food Engineering, Faculty of Agriculture, Selcuk University, 42031 Konya, - - 2014
Free fatty acid contents of sprouted soybean oil were found between 1.26% (Adasoy) and 4.20% (Nazlıcan and Türksoy). Peroxide values (PV) of sprouted soybean oils were found between 1.52meq/kg (Adasoy) and 3.85meq/kg (A3935), while peroxide values of roasted seed oils were determined between 2.52meq/kg (Adasoy) and 4.03meq/kg (Nova). Palmitic, oleic ...
Schnitzer Morris - - 2014
Two methods are proposed for increasing the commercial value of wheat straw based on its chemical constituents. The first method involves the determination and extraction of the major organic components of wheat straw, and the second involves those found and extracted in the aqueous and viscous biooils derived from the ...
Zafeiraki Effrosyni - - 2014
Perfluorinated compounds (PFCs) are used in food packaging materials as coatings/additives for oil and moisture resistance. In the current study, foodstuff-packaging materials collected from the Greek market, made of paper, paperboard or aluminum foil were analyzed for the determination of PFCs. For the analysis of the samples, pressurized liquid extraction ...
Ono Masateru M School of Agriculture, Tokai - - 2014
Five new resin glycosides having macrolactone structures (jalapins), named calysolins V-IX (1-5), were isolated from the leaves, stems, and roots of Calystegia soldanella ROEM. et SCHULT. (Convolvulaceae). Their structures were determined on the basis of spectroscopic data as well as chemical evidence. The isolated compounds could be classified into two ...
Hunt Mary C MC Dublin Institute of Technology, College of Sciences & Health, School of Biological Sciences, Kevin Street, Dublin 8, Ireland. Electronic address: - - 2014
Peroxisomes are nearly ubiquitous organelles involved in a number of metabolic pathways that vary between organisms and tissues. A common metabolic function in mammals is the partial degradation of various (di)carboxylic acids via α- and β-oxidation. While only a small number of enzymes catalyze the reactions of β-oxidation, numerous auxiliary ...
Agler M T MT Department of Biological and Environmental Engineering, 214 Riley-Robb Hall, Cornell University, Ithaca, NY 14853, USA E-mail: la249@cornell.edu; Current address: Department of Plant-Microbe Interactions, Max Planck Institute for Plant Research, Carl-von-Linné Weg 10, 50829 Cologne, - - 2014
High productivity and specificity in anaerobic digesters arise because complex microbiomes organize into a metabolic cascade to maximize energy recovery and to utilize the advantage that the gaseous end product methane freely bubbles out of the system. These lessons were applied to ascertain whether a reactor microbiome could be shaped ...
Dobaradaran Sina - - 2014
Trichloroethene and tetrachloroethene are the most common pollutants in groundwater and two of the priority pollutants listed by the U.S. Environmental Protection Agency. In previous studies on TCE and PCE photolysis and photochemical degradation, concentration ranges exceeding environmental levels by far with millimolar concentrations of TCE and PCE have been ...
Ramond Elodie E Université Paris Descartes, Sorbonne Paris Cité, Bâtiment Leriche, Paris, France ; INSERM, U1002, Unité de Pathogénie des Infections Systémiques, Paris, - - 2014
Intracellular bacterial pathogens have developed a variety of strategies to avoid degradation by the host innate immune defense mechanisms triggered upon phagocytocis. Upon infection of mammalian host cells, the intracellular pathogen Francisella replicates exclusively in the cytosolic compartment. Hence, its ability to escape rapidly from the phagosomal compartment is critical ...
Pandit Santosh S Department of Preventive Dentistry, Chonbuk National University, Jeonju 561-756, Republic of - - 2014
Withania somnifera (Ashwagandha) is a plant of the Solanaceae family. It has been widely used as a remedy for a variety of ailments in India and Nepal. The plant has also been used as a controlling agent for dental diseases. The aim of the present study was to evaluate the ...
Azmi Mohamad Nurul MN Department of Chemistry, Faculty of Science, University Malaya, Kuala Lumpur 50603, Malaysia. - - 2014
A phytochemical investigation of the methanolic extract of the bark of Endiandra kingiana led to the isolation of seven new tetracyclic endiandric acid analogues, kingianic acids A-G (1-7), together with endiandric acid M (8), tsangibeilin B (9) and endiandric acid (10). Their structures were determined by 1D- and 2D-NMR analysis ...
Dhara Rupali R Food Engineering and Technology Department, Institute of Chemical - - 2014
Diacylglycerol (DAG)-rich sunflower oil was prepared and the optimal conditions for synthesis of DAG-rich oil by glycerolysis using biocatalyst TLIM was determined. A maximum production of 59.8% DAG was obtained after 5 h of constant reaction under vacuum (756 mm of Hg). The optimum temperature for glycerolysis was found to ...
Yu Zhiliang Z 0000-0003-4849-7055 College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, - - 2014
L-amino acid oxidase (LAAO) is attracting more attentions due to its broad and important biological functions. Recently, an LAAO-producing marine microorganism (strain B3) was isolated from the intertidal zone of Dinghai sea area, China. Physiological, biochemical, and molecular identifications together with phylogenetic analysis congruously suggested that it belonged to the ...
Zacharof M-P MP Centre for Complex Fluid Processing (CCFP), College of Engineering, Swansea University, Talbot Building, Swansea, SA2 8PP, UK and Centre for Water Advanced Technologies and Environmental Research (CWATER), College of Engineering, Swansea University, Talbot Building, Swansea, SA2 8PP, UK E-mail: - - 2014
Waste effluents from anaerobic digesters of agricultural waste were treated with a range of membranes, including microfiltration and nanofiltration (NF), to concentrate volatile fatty acids (VFA). Microfiltration was applied successfully to produce sterile, particle-free solutions with a VFA concentration of 21.08 mM of acetic acid and 15.81 mM of butyric ...
Ambrozova Jarmila Vavra JV Department of Food Analysis and Chemistry, Faculty of Technology, Tomas Bata University in Zlin, nam. T. G. Masaryka 5555, Zlin CZ-760 01, Czech Republic. - - 2014
Total lipid contents of green (Chlorella pyrenoidosa, C), red (Porphyra tenera, N; Palmaria palmata, D), and brown (Laminaria japonica, K; Eisenia bicyclis, A; Undaria pinnatifida, W, WI; Hizikia fusiformis, H) commercial edible algal and cyanobacterial (Spirulina platensis, S) products, and autotrophically cultivated samples of the green microalga Chlorella kessleri (CK) ...
Durkes Abigail A Department of Comparative Pathobiology, College of Veterinary Medicine (Durkes), Purdue University, West Lafayette, - - 2014
Bicarbonate is critical for acid-base tissue homeostasis. In this study we investigated the role of bicarbonate ion transport in vocal fold epithelial defense to acid challenges. Acidic insults to the larynx are common in gastric reflux, carcinogenesis and metastasis, and acute inflammation. Ion transport was measured in viable porcine vocal ...
Dong Shengzhao S Beijing Key Laboratory of Bioprocess, The Biorefinery Research and Engineering Center of the Ministry of Education of China, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, - - 2014
Haematococcus pluvialis is one of the potent organisms for production of astaxanthin. Up to now, no efficient method has been achieved due to its thick cell wall hindering solvent extraction of astaxanthin. In this study, four different methods, hydrochloric acid pretreatment followed by acetone extraction (HCl-ACE), hexane/isopropanol (6 : 4, v/v) mixture ...
Abdulmalek Emilia E Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, - - 2014
Here, we focused on a simple enzymatic epoxidation of alkenes using lipase and phenylacetic acid. The immobilised Candida antarctica lipase B, Novozym 435 was used to catalyse the formation of peroxy acid instantly from hydrogen peroxide (H2O2) and phenylacetic acid. The peroxy phenylacetic acid generated was then utilised directly for ...
Ellis Gregory A GA Pharmaceutical Sciences Division, University of Wisconsin-Madison, 777 Highland Avenue, Madison, WI 53705, USA. - - 2014
Two novel trialkyl-substituted aromatic acids, solwaric acids A and B, were isolated from a marine Solwaraspora sp. cultivated from the ascidian Trididemnum orbiculatum. Solwaric acids A and B were isotopically labeled with U-13C glucose, and analysis of a 13C-13C COSY allowed for unambiguous determination of the location of the phenyl ...
Zhou Xiang X Institute of Modern Physics, Chinese Academy of Sciences, 509 Nanchang Road, Lanzhou, Gansu 730000, PR China. - - 2014
Butyric acid as a renewable resource has become an increasingly attractive alternative to petroleum-based fuels. Clostridium tyrobutyricum ATCC 25755T is well documented as a fermentation strain for the production of acids. However, it has been reported that butyrate inhibits its growth, and the accumulation of acetate also inhibits biomass synthesis, ...
Chen Gao - - 2014
Polyunsaturated fatty acids (PUFAs), which contain two or more double bonds in their backbone, are the focus of intensive global research, because of their nutritional value, medicinal applications, and potential use as biofuel. However, the ability to produce these economically important compounds is limited, because it is both expensive and ...
Tareq Fakir Shahidullah FS Department of Marine Biotechnology, University of Science and Technology, 176 Gajung-dong, 217 Gajungro Yuseong-gu, Daejeon, 305-350, Korea. - - 2014
Concerning the requirements of effective drug candidates to combat against high rising multidrug resistant pathogens, we isolated three new linear lipopeptides, gageostatins A-C (1-3), consisting of hepta-peptides and new 3-β-hydroxy fatty acids from the fermentation broth of a marine-derived bacterium Bacillus subtilis. Their structures were elucidated by analyzing a combination ...
Sandjo Louis P LP Johannes-Gutenberg-University Mainz, Institute of Organic Chemistry, Duesbergweg 10-14, D-55128 Mainz, - - 2014
Four new polyketides have been identified in culture filtrates of the fungal strain Penicillium sp. IBWF104-06 isolated from a soil sample. They are structurally based on the same trans-decalinpentanoic acid skeleton as tanzawaic acids A-H. One of the new compounds was found to inhibit the conidial germination in the rice ...
Wei Benxi B The State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China ; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, - - 2014
Surface chemical compositions of starch nanocrystals (SNC) prepared using sulfuric acid (H2SO4) and hydrochloric acid (HCl) hydrolysis were analyzed by X-ray photoelectron spectroscopy (XPS) and FT-IR. The results showed that carboxyl groups and sulfate esters were presented in SNC after hydrolysis with H2SO4, while no sulfate esters were detected in ...
Ghidini Alice A Department of Biosciences and Nutrition, Karolinska Institutet, Novum, Hälsovägen Huddinge 7, 14183, Sweden. - - 2014
Several different approaches have been explored for conjugation of oligoethers to PNA with internally or N-terminal placed diaminopropionic acid residues. Single and double conjugation of 2-(2-(2-aminoethoxy)ethoxy)ethanol was obtained using carbonyldimidazole. Using a post PNA-assembly coupling procedure the building block 2-(2-(2-(benzoyloxy)ethoxy)ethoxy)acetic acid multiple attachment of 2-(2-(2-hydroxyethoxy)ethoxy)acetyl groups to both N-terminal and ...
Zhao Xiuying - - 2014
Organic acids as important constituents of organic aerosols not only influence the aerosols' hygroscopic property, but also enhance the formation of new particles and secondary organic aerosols. This study reported organic acids including C14-C32 fatty acids, C4-C9 dicarboxylic acids and aromatic acids in PM2.5 collected during winter 2009 at six ...
Zhang Gaosen G Division of Earth and Ecosystem Sciences, Desert Research Institute, Las Vegas, Nevada, United States of - - 2014
D-amino acids are toxic for life on Earth. Yet, they form constantly due to geochemical racemization and bacterial growth (the cell walls of which contain D-amino acids), raising the fundamental question of how they ultimately are recycled. This study provides evidence that bacteria use D-amino acids as a source of ...
Clauser Maria - - 2014
The flower heads of fourteen wild Arnica montana L. populations were collected in the summer of 2010 in the provinces of Trento, Brescia and Bergamo (Italy). The dried flowers were analyzed to assess their chemical diversity. HLPC-MS analysis led to the identification of phenolic derivatives and sesquiterpene lactones in the ...
Astudillo Luis - - 2014
Two new diterpenes,2-acetoxy-13-hydroxy-mulin-11-ene and 2-acetoxy-mulin-11, 13-diene,have been isolated from the aerial parts of Azorella spinosa and their structures determined by spectroscopic and conventional chemical methods. Furthermore, 2, 13-dihydroxy-mulin-11-ene was obtained using a basic hydrolysis of the first compound. Two diterpenes reported for other Azorella species have also been found, namely ...
Farahi Mahnaz - - 2014
Silica tungstic acid (STA) has been found to be an efficient and reusable solid acid catalyst for the synthesis of 2-amino-4H-chromenes via the three-component reaction of aromatic aldehydes, malononitrile, and β-naphthol. STA as a novel solid acid was characterized by X-ray fluorescence, X-ray diffraction, and Fourier transform infrared spectroscopy.
Zhang Ju-Cheng - - 2014
A new alkylamine derivative and a common fatty acid were isolated from Streptomyces sp. YIM 66142. On the basis of spectral data, including HRMS, NMR and 2D NMR, their structures were determined as medelamine C (1) and isomyristic acid (2). The omega-hydroxyl group in structure 1 is rare in a ...
Langseter Anne Marie AM Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, P.O.Box 5003, NO-1432 Ås, - - 2014
The synthesis of the marine natural product 1,6Z,9Z,12Z,15Z-octadecapentaen-3-one (1) has been achieved by two different routes starting from the ethyl esters of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), respectively. Using EPA ethyl ester as starting material the polyunsaturated vinyl ketone lipid 1 was obtained in 17% overall yield.
Rajemiarimiraho Manitriniaina M Centre National d'Application de la Recherche Pharmaceutique (CNARP), BP 702 Antananarivo 101, Madagascar, France. - - 2014
With at least 60% of the Millettia species (Fabaceae) being in medicinal use, we found it relevant to assess the potential antiprotozoal and antifungal activities of Millettia richardiana. Water and methanol crude extracts of the stem barks from M. richardiana and the six fractions resulting from the fractionation of the ...
< 6 7 8 9 10 11 12 13 14 15 16 >