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Showing 1-30 of 118 results for "185914" within Papers
Soledad Mateo et al.
Carbohydrate polymers, 93(2), 416-423 (2013-03-19)
Using the severity factor, it has been possible to study cellulose and hemicellulose fractional conversion, sugar yields change and oligosaccharides variation through olive tree pruning biomass pretreatments with acid or liquid hot water under pressure. The temperatures tested were in
Tae Hyung Won et al.
Food chemistry, 142, 107-113 (2013-09-05)
A method based on HPLC with diode array detector (DAD) and electrospray ionisation mass spectrometry (ESI-MS) was established for the simultaneous determination of 5-HMF and its derivatives, including a new 5-HMF derivative, in Rehmanniae radix preparata. Validation parameters, such as
Christopher J Keturakis et al.
ChemSusChem, 11(23), 4044-4059 (2018-10-20)
Biomass pyrolysis by solid acid catalysts is one of many promising technologies for sustainable production of hydrocarbon liquid fuels and value-added chemicals, but these complex chemical transformations are still poorly understood. A series of well-defined model SiO2 -supported alumina catalysts
Rui Xie et al.
Bioresource technology, 186, 106-113 (2015-03-31)
Carbonyl compounds generated in biomass pretreatment hinder the biochemical conversion of biomass hydrolysates to biofuels. A novel approach of detoxifying hydrolysates with amino acids for ethanol production was developed. Among the 20 amino acids assessed for their detoxification efficiency and
Sai An et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 21(30), 10786-10798 (2015-06-20)
Morphology evolution of sulfonic acid functionalized organosilica nanohybrids (Si(Et)Si-Pr/ArSO3 H) with a 1D tubular structure (inner diameter of ca. 5 nm), a 2D hexagonal mesostructure (pore diameter of ca. 5 nm), and a 3D hollow spherical structure (shell thickness of 2-3 nm and
Monika Krystof et al.
ChemSusChem, 6(4), 630-634 (2013-03-05)
5-Hydroxymethylfurfural (HMF) is a valuable biomass-derived building block. Among possible HMF valorization products, a broad range of HMF esters can be synthesized. These HMF esters have found some promising applications, such as monomers, fuels, additives, surfactants, and fungicides, and thus
Yuwadee Ackarabanpojoue et al.
Journal of food science, 80(5), E998-1004 (2015-04-02)
This study aimed at investigating the effect of nitrate removal from pineapple juice by electrodialysis (ED) on selected properties of the ED-treated juice. Single-strength pineapple juice with reduced pulp content was treated by ED to reduce the nitrate concentration to
Tim Ståhlberg et al.
ChemSusChem, 4(4), 451-458 (2011-01-29)
The synthesis of 5-(hydroxymethyl)furfural (HMF) in ionic liquids is a field that has grown rapidly in recent years. Unique dissolving properties for crude biomass in combination with a high selectivity for HMF formation from hexose sugars make ionic liquids attractive
Vinit Choudhary et al.
Journal of the American Chemical Society, 135(10), 3997-4006 (2013-02-26)
5-(Hydroxymethyl)furfural (HMF) and levulinic acid production from glucose in a cascade of reactions using a Lewis acid (CrCl3) catalyst together with a Brønsted acid (HCl) catalyst in aqueous media is investigated. It is shown that CrCl3 is an active Lewis
Manali Kapoor et al.
Carbohydrate polymers, 124, 265-273 (2015-04-04)
To overcome the recalcitrant nature of biomass several pretreatment methodologies have been explored to make it amenable to enzymatic hydrolysis. These methodologies alter cell wall structure primarily by removing/altering hemicelluloses and lignin. In this work, alkali, dilute acid, steam explosion
Guosong Lai et al.
Biosensors & bioelectronics, 74, 660-665 (2015-07-24)
A Prussian blue (PB) functionalized mesoporous carbon nanosphere (MCN) composite was prepared for loading signal antibody and high-content glucose oxidase (GOD) to obtain a new nanoprobe for sensitive electrochemical immunoassay. The MCN nanocarrier with an average diameter of 180 nm
Gang Cao et al.
Food chemistry, 140(1-2), 273-279 (2013-04-13)
The aim of this study was to investigate the protective effect of 5-HMF on human umbilical vein endothelial cells (HUVECs) injured by high glucose in vitro, and the mechanism underlying this process. Our results demonstrated that high glucose-induced oxidative stress
Menggen Ma et al.
Applied microbiology and biotechnology, 97(18), 8411-8425 (2013-08-06)
Aldehyde inhibitors such as furfural and 5-hydroxymethylfurfural (HMF) are generated from biomass pretreatment. Scheffersomyces stipitis is able to reduce furfural and HMF to less toxic furanmethanol and furan-2,5-dimethanol; however, the enzymes involved in the reductive reaction still remain unknown. In
Xin Hu et al.
Journal of pharmaceutical and biomedical analysis, 112, 15-22 (2015-05-06)
The complexity of natural products always leads to the co-elution of interfering compounds with bioactive compounds, which then has a detrimental effect on structural elucidation. Here, a new method, based on selective solid phase extraction combined with 1,1-diphenyl-2-picrylhydrazyl radical (DPPH)
[HYGIENIC PROBLEMS OF FURFURAL].
I KLUCIK
Bratislavske lekarske listy, 43, 488-496 (1963-01-01)
Danielle Miller et al.
Biochemistry, 53(28), 4635-4647 (2014-07-01)
We have established the biosynthetic pathway and the associated genes for the biosynthesis of the 5-(aminomethyl)-3-furanmethanol (F1) moiety of methanofuran in the methanogenic archaeon Methanocaldococcus jannaschii. The recombinant enzyme, derived from the MJ1099 gene, was shown to readily condense glyceraldehyde
Rasim Alper Oral et al.
Food chemistry, 143, 367-370 (2013-09-24)
Several techniques have been used for hydroxymethylfurfural (HMF) detection in foods. Most of these involve the protein hydrolysation step process to determine the presence of organic acid with heat treatment. The affinity and separability of HMF to/from some proteins were
Fatma Abbès et al.
Food science and technology international = Ciencia y tecnologia de los alimentos internacional, 19(4), 323-333 (2013-06-05)
The effect of the concentration temperature on the antioxidant activity, carotenoid and phenolic compounds of date syrup was investigated. Date juice was concentrated at 100 and at "60 in vacuum". After concentration, total phenolic, tannin, non-tannin, flavonoid and carotenoid content
Stanisław Kowalski
Food chemistry, 141(2), 1378-1382 (2013-06-26)
The paper presents the results of microwave irradiation and conventional heating of honey. These two kinds of thermal treatment result in the formation of 5-hydroxymethyl-2-furfural (HMF), and changes in the antioxidant potential of honeys, which were studied as well. Four
Arvind H Jadhav et al.
Bioresource technology, 132, 342-350 (2013-02-26)
Acidity modified silver exchanged silicotungstic acid (AgSTA) catalyst was prepared and characterized by X-ray diffraction, FT-IR spectroscopy, Raman spectroscopy, FT-IR pyridine adsorption, SEM imaging, EDX mapping, and antimicrobial activity was also tested. The catalytic activity was evaluated for the dehydration
Audrey R Smith et al.
Journal of mass spectrometry : JMS, 50(11), 1206-1213 (2015-10-28)
Absolute photoionization cross sections of the molecules 2-ethylfuran, 2-acetylfuran and furfural, including partial ionization cross sections for the dissociative ionized fragments, are measured for the first time. These measurements are important because they allow fuel quantification via photoionization mass spectrometry
Liqun Jiang et al.
Bioresource technology, 196, 194-199 (2015-08-05)
In this study, the effects of glycerol pretreatment on subsequent glycerol fermentation and biomass fast pyrolysis were investigated. The liquid fraction from the pretreatment process was evaluated to be feasible for fermentation by Paenibacillus polymyxa and could be an economic
Selective hydrogenation of furfural and levulinic acid to biofuels on the ecofriendly Cu-Fe catalyst.
Yan K and Chen A.
Fuel: The Science and Technology of Fuel and Energy, 115, 101-108 (2014)
D B Jones et al.
The Journal of chemical physics, 143(18), 184310-184310 (2015-11-17)
The He(i) photoelectron spectrum of furfural has been investigated, with its vibrational structure assigned for the first time. The ground and excited ionized states are assigned through ab initio calculations performed at the outer-valence Green's function level. Triple differential cross
Xiaofei Zeng et al.
Environmental science & technology, 49(22), 13667-13675 (2015-10-28)
Furanic and phenolic compounds are problematic byproducts resulting from the breakdown of lignocellulosic biomass during biofuel production. The capacity of a microbial electrolysis cell (MEC) to produce hydrogen gas (H2) using a mixture of two furanic (furfural, FF; 5-hydroxymethyl furfural
Mohammed Moniruzzaman et al.
BMC complementary and alternative medicine, 13, 43-43 (2013-02-26)
The aim of the present study was to evaluate the physicochemical and antioxidant properties of Malaysian monofloral honey samples-acacia, pineapple and borneo honey-and compare them with tualang honey. Acacia and pineapple honey are produced by Apis mellifera bees while borneo
Yingxiong Wang et al.
Bioresource technology, 143, 384-390 (2013-07-04)
The direct conversion of chitin biomass to 5-hydroxymethylfurfural (5-HMF) in ZnCl2 aqueous solution was studied systemically. D-Glucosamine (GlcNH2) was chosen as the model compound to investigate the reaction, and 5-HMF could be obtained in 21.9% yield with 99% conversion of
Huiling Li et al.
Biotechnology for biofuels, 8, 127-127 (2015-08-28)
Corncob as one of the most suitable feedstock for the production of a variety of high-value-added chemicals is receiving increasing attention worldwide because of the characteristics of high carbohydrate (cellulose and hemicelluloses) contents and high energy densities. Furfural produced from
Enbo Xu et al.
Journal of food science, 80(7), C1476-C1489 (2015-06-20)
Enzymatic extrusion, instead of traditional steam cooking, to treat rice is an efficient and alternative pretreatment for Chinese rice wine fermentation. In order to determine the formation of volatiles in enzymatic extrusion-processed rice wine (EE), and to confirm its characteristic
Yongguang Guan et al.
Food chemistry, 143, 60-65 (2013-09-24)
Supercritical carbon dioxide fluid extraction was used to extract 5-hydroxymethyl-2-furfural from caramel colour (solid content was about 75%). The procedure was carried out by response surface methodology using a quadratic polynomial model. Extraction pressure, time, temperature and ethanol content were
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