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Showing 1-30 of 112 results for "W248924" within Papers
Huan-Bo Cheng et al.
Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials, 35(7), 1088-1090 (2012-12-21)
To study the chemical constituents of Polygonum perfoliatum. The chemical constituents of Polygonum perfoliatum were isolated and purified by chromatography on silica gel, Sephadex LH-20 and Semi-preparative HPLC. The structures of compounds were elucidated and identified by physicochemical properties, H-NMR
Magdalena Hardt-Stremayr et al.
Journal of separation science, 36(4), 670-676 (2013-02-13)
5-Hydroxymethylfurfural (5-HMF) is a natural occurring substance taken up by everyday food. In former studies it was shown that 5-HMF is completely decomposed in the body after oral or intravenous application resulting in three main metabolites named 5-hydroxymethylfuroic acid, 2,5-furandicarboxylic
Chandan Kundu et al.
Bioresource technology, 178, 28-35 (2014-09-11)
In order to produce ethanol from yellow poplar, deacetylation was performed using sodium hydroxide (NaOH). Optimal deacetylation conditions were determined by a response surface methodology. The highest acetic acid concentration obtained was 7.06 g/L when deacetylation was performed at 60
Trevor James Morgan et al.
PloS one, 10(8), e0136511-e0136511 (2015-08-27)
A reactor was designed and commissioned to study the fast pyrolysis behavior of banagrass as a function of temperature and volatiles residence time. Four temperatures between 400 and 600°C were examined as well as four residence times between ~1.0 and
Yan Zhang et al.
Journal of industrial microbiology & biotechnology, 41(10), 1505-1516 (2014-08-03)
Fermentation of liquid hot water (LHW) pretreated Miscanthus giganteus (MG) by Clostridium beijerinckii NCIMB 8052 was investigated towards understanding the toxicity of lignocellulose-derived inhibitors to solventogenic Clostridium species vis-à-vis butanol production. While C. beijerinckii NCIMB 8052 did not grow in
Charlie J Duval et al.
Food chemistry, 138(1), 270-277 (2012-12-26)
The aim of this study was to analyze the impact of the water content of wood on the concentrations of volatile compounds which can be extracted after heat treatments. Head Space-Solid Phase Micro Extraction Gas Chromatography coupled to Mass Spectrometry
Pingxi Xu et al.
Proceedings of the National Academy of Sciences of the United States of America, 111(46), 16592-16597 (2014-10-29)
Insect repellents are important prophylactic tools for travelers and populations living in endemic areas of malaria, dengue, encephalitis, and other vector-borne diseases. DEET (N,N-diethyl-3-methylbenzamide) is a 6-decade-old synthetic repellent, which is still considered the gold standard of mosquito repellents. Mosquitoes
Victor Ujor et al.
Applied microbiology and biotechnology, 99(8), 3729-3740 (2015-02-19)
In addition to glucans, xylans, and arabinans, lignocellulosic biomass hydrolysates contain significant levels of nonsugar components that are toxic to the microbes that are typically used to convert biomass to biofuels and chemicals. To enhance the tolerance of acetone-butanol-ethanol (ABE)-generating
Selective conversion of furfural to methylfuran over silica-supported Ni Fe bimetallic catalysts.
Sitthisa S, et al.
J. Catal., 284(1), 90-101 (2011)
Jan Hintzpeter et al.
FASEB journal : official publication of the Federation of American Societies for Experimental Biology, 29(1), 263-273 (2014-11-08)
The purpose of this study was to investigate the origin and function of the aldo-keto reductase (AKR) superfamily as enzymes involved in the detoxification of xenobiotics. We used the cyanobacterium Synechocystis sp. PCC 6803 as a model organism and sequence
Abdul Azis Ariffin et al.
Food chemistry, 154, 102-107 (2014-02-13)
For the first time 5-hydroxymethyl-2-furaldehyde (HMF) was separated from crude palm oil (CPO), and its authenticity was determined using an RP-HPLC method. Separation was accomplished with isocratic elution of a mobile phase comprising water and methanol (92:8 v/v) on a
Huiling Li et al.
Bioresource technology, 176, 242-248 (2014-12-03)
The conversion of xylose, water-insoluble hemicelluloses (WIH) and water-soluble fraction (WSF) of corncob to furfural was performed using montmorillonite with tin ions (Sn-MMT) containing double acid sites as a solid acid catalyst. The co-existence of Lewis acids and Brønsted acids
Xiaoyuan Zhou et al.
ChemSusChem, 6(2), 383-388 (2013-01-03)
We report the one-pot alkylation of mesitylene with carbohydrate-derived 5-(hydroxymethyl)furfural (HMF) as a step toward diesel-range liquids. Using FeCl(3) as a catalyst, HMF is shown to alkylate toluene, xylene, and mesitylene in high yields in CH(2)Cl(2) and MeNO(2) solvents. Efforts
Ji Ye Lee et al.
Bioresource technology, 132, 84-90 (2013-02-12)
The objective of this work was to investigate the feasibility of acid-catalyzed hydrothermal fractionation for maximum solubilization of the hemicellulosic portion of three agricultural residues. The fractionation conditions converted into combined severity factor (CS) in the range of 1.2-2.9. The
Yu Shen et al.
Journal of industrial microbiology & biotechnology, 41(11), 1637-1645 (2014-09-30)
The phenolic compounds present in hydrolysates pose significant challenges for the sustainable lignocellulosic materials refining industry. Three Saccharomyces cerevisiae strains with high tolerance to lignocellulose hydrolysate were obtained through ethyl methanesulfonate mutation and adaptive evolution. Among them, strain EMV-8 exhibits
Roberto A Agudelo et al.
New biotechnology, 33(1), 153-163 (2015-10-20)
Triticale, a non-food based, low-cost and well-adapted crop in marginal lands has been considered as a potential 1G and 2G feedstock for bio-ethanol production. In this work, triticale straw was evaluated as a source of fermentable sugars by combination of
Nobuo Ochiai et al.
Journal of chromatography. A, 1421, 103-113 (2015-08-16)
An extension of multi-volatile method (MVM) technology using the combination of a standard dynamic headspace (DHS) configuration, and a modified DHS configuration incorporating an additional vacuum module, was developed for milliliter injection volume of aqueous sample with full sample evaporation.
Tong-Chao Su et al.
Scientific reports, 5, 17538-17538 (2015-12-10)
In this study, magnetic carbonaceous acids were synthesized by pyrolysis of the homogeneous mixtures of glucose and magnetic Fe3O4 nanoparticles, and subsequent sulfonation. The synthesis conditions were optimized to obtain a catalyst with both high acid density (0.75 mmol g(-1))
Tao Pan et al.
ChemSusChem, 6(1), 47-50 (2012-12-15)
One divided into two combined into one: The catalytic conversion of furfural into a 2,5-furandicarboxylic acid-based polyester, linked by the disproportionation of furoate to furan and 2,5-furandicarboxylate, is reported. In this manner, all carbons are utilized, demonstrating the success of
K S Arias et al.
ChemSusChem, 6(1), 123-131 (2013-01-11)
The selective acetalization of 5-hydroxymethylfurfural (HMF) with long-chain alkyl alcohols has been performed to obtain precursors of molecules with surfactant properties. If direct acetalization of HMF with n-octanol is performed in the presence of strong acids (homogeneous and heterogeneous catalysts)
Shizeng Wang et al.
Fungal genetics and biology : FG & B, 82, 1-8 (2015-07-02)
During xylitol fermentation, Candida tropicalis is often inhibited by inhibitors in hemicellulose hydrolysate. The mechanisms involved in the metabolic responses to inhibitor stress and the resistances to inhibitors are still not clear. To understand the inhibition mechanisms and the metabolic
I Agirrezabal-Telleria et al.
Bioresource technology, 143, 258-264 (2013-07-03)
Among the furan-based compounds, furfural (FUR) shows interesting properties as building-block or industrial solvent. It is produced from pentosan-rich biomass via xylose cyclodehydration. The current FUR production makes use of homogeneous catalysts and excessive amounts of steam. The development of
Juan Zhou et al.
Journal of food science, 78(3), C387-C394 (2013-03-06)
We investigated and compared the physicochemical properties (moisture, color, ash, pH, electrical conductivity, free acidity, lactonic acidity, total acidity, fructose, glucose, sucrose, diastase activity, and HMF) and mineral contents (Al, Ca, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Na
Alberto Villa et al.
ChemSusChem, 6(4), 609-612 (2013-03-16)
Mixed noblility: We show that the modification of a gold/carbon catalyst with platinum or palladium produces stable and recyclable catalysts for the selective oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA): the support and nanoparticle chemistry directly mediate the selective
Xuan Wang et al.
Proceedings of the National Academy of Sciences of the United States of America, 110(10), 4021-4026 (2013-02-23)
Pretreatments such as dilute acid at elevated temperature are effective for the hydrolysis of pentose polymers in hemicellulose and also increase the access of enzymes to cellulose fibers. However, the fermentation of resulting syrups is hindered by minor reaction products
Rosa Perestrelo et al.
Journal of chromatography. A, 1381, 54-63 (2015-01-27)
An improved, reliable and powerful analytical strategy based on digitally controlled microextraction by packed sorbent (MEPS) combined with ultrahigh pressure liquid chromatography (UHPLC) was validated for the simultaneous identification and quantification of major furanic derivatives, namely 5-hydroxymethyl-2-furaldehyde (5HMF), 5-methyl-2-furaldehyde (5MF)
Cristina García-Sancho et al.
ChemSusChem, 6(4), 635-642 (2013-03-21)
A series of silica-based MCM-41-supported niobium-oxide catalysts are prepared, characterized by using XRD, N2 adsorption-desorption, X-ray photoelectron spectroscopy, Raman spectroscopy, and pyridine adsorption coupled to FTIR spectroscopy, and tested for the dehydration of D-xylose to furfural. Under the operating conditions
Amal Agila et al.
Journal of food science, 78(2), C184-C191 (2013-01-22)
High fructose corn syrup (HFCS) was added at 5% to 40% to Indiana wildflower honey and added at 40% to Ohio and Indiana honeys from blueberry, star thistle, clover and wildflower, and an unknown source to simulate honey adulteration. Unadulterated
Mariusz Kuglarz et al.
Bioresource technology, 200, 639-647 (2015-11-10)
The aim of this study was to develop integrated biofuel (cellulosic bioethanol) and biochemical (succinic acid) production from industrial hemp (Cannabis sativa L.) in a biorefinery concept. Two types of pretreatments were studied (dilute-acid and alkaline oxidative method). High cellulose
Le Gao et al.
Biotechnology for biofuels, 8, 194-194 (2015-12-18)
Algal biomass, known as a potential feedstock for biofuel production, has cell wall structures that differ from terrestrial biomass. The existing methods for processing algae are limited to conventional pretreatments for terrestrial biomass. In this study, we investigated a novel
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