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xylose, etc ; absorption; biomass; carbon; carbon dioxide; carbonization; electrochemistry; electron transfer; grana; oxidation; photosynthesis; solar radiation; structure-activity relationships; synergism; thylakoids; Show all 15 Subjects
Abstract:
... Photosynthesis by plants stores sunlight into chemicals and drives CO₂ fixation into sugars with low biomass conversion efficiency due to the unoptimized solar spectrum utilization and various chemical conversion possibilities that follow H₂O oxidation. Expanding the solar spectrum utilization and optimizing the charge transfer pathway of photosynthesis is critical to improving the conversion effi ...
xylose, etc ; Ribes; air; air temperature; antioxidant activity; antioxidants; ascorbic acid; atmospheric pressure; carbohydrate structure; flavonoids; fruit maturity; fruits; glucose; polysaccharides; shortwave radiation; specific humidity; triterpenoids; China; Show all 18 Subjects
Abstract:
... Ribes stenocarpum Maxim. (RSM) is abundant but less known in the Qinghai-Tibet Plateau, so far, it is still in the wild state and has not been effectively developed and utilized. Based on this, the fruits RSM at seven different picking time were used to quantify the contents of total polysaccharides (TP), total flavonoids (TF), titratable acids (TA), total triterpene acids (TTA), fruit oils (FO) a ...
Renan Yuji Miyamoto; Ricardo Rodrigues de Melo; Isabelle Lobo de Mesquita Sampaio; Amanda Silva de Sousa; Edvaldo Rodrigo Morais; Cintia Regina Sargo; Leticia Maria Zanphorlin
xylose; xylose isomerase, etc ; biotechnology; corn; cosmetics; metabolism; polymers; syrups; value added; Show all 9 Subjects
Abstract:
... Isomerases are enzymes that induce physical changes in a molecule without affecting the original molecular formula. Among this class of enzymes, xylose isomerases (XIs) are the most studied to date, partly due to their extensive application in industrial processes to produce high-fructose corn sirups. In recent years, the need for sustainable initiatives has triggered efforts to improve the biobas ...
... Low-temperature biorefineries inhibit the multiplication of undesired microorganisms, improve product purity and reduce economic costs. Herein, to improve the 2,3-butanediol (2,3-BD) bioconversion efficiency from hemicellulose, a psychrotrophic hemicellulose-degrading strain Raoultella terrigena HC6 with high β-xylosidase activity 1520 U/mL was isolated and genetically modified. Xylan (hemicellulo ...
... Halomonas bluephagenesis is an essential host for next generation industrial biotechnology (NGIB) due to its ability to grow under high-salt and alkali conditions. In this study, H. bluephagenesis TD01 was engineered to metabolize xylose. Firstly, four different xylose-specific transporters were introduced yet xylose cannot be consumed. Further expression of xylose isomerase from Escherichia coli ...
xylose, etc ; aluminum chloride; catalysts; formic acid; furfural; temperature; Show all 6 Subjects
Abstract:
... An effective continuous furfural production from xylose in a microreactor over dual-acid catalysts was proposed. In this work, furfural was synthesized in an organic solvent-free system using formic acid and aluminum chloride as catalyst. The role of these catalysts in the consecutive reactions was examined and verified. The influence of operating conditions including xylose concentration, reactio ...
xylose, etc ; green chemistry; hydrogenation; oxidation; pentoses; sugar lactones; Show all 6 Subjects
Abstract:
... An iron-catalysed transfer hydrogenation methodology was developed to oxidise aldo-hexoses and -pentoses into sugar lactones using different acceptors. The transformation occurs on unprotected sugars with complete chemo-selectivity for the anomeric position. An application for the competitive oxidation of pentose from a mixture of C5 and C6 sugars is also reported. Finally, we managed to perform t ...
... The current climate crisis demands replacement of fossil energy sources with sustainable alternatives. In this scenario, second‐generation bioethanol, a product of lignocellulosic biomass fermentation, represents a more sustainable alternative. However, Saccharomyces cerevisiae cannot metabolize pentoses, such as xylose, present as a major component of lignocellulosic biomass. Xylose isomerase (XI ...
xylose, etc ; arabinose; cell walls; corn; endosperm; galactose; xylan; xylanases; Show all 8 Subjects
Abstract:
... Heteroxylans (HX) from vitreous and floury parts of maize endosperm were isolated. Structural analysis showed a xylan backbone with few unsubstituted xylose residues (<9%) demonstrating the high content in side chains in both fractions. HX from floury endosperm contained more arabinose and galactose than vitreous HX. The mono-substitution rate was 15% higher in the vitreous endosperm HX. Similar a ...
xylose, etc ; biohydrogen; fermentation; glucose; hydrogen production; iron oxides; polymers; Show all 7 Subjects
Abstract:
... Biohydrogen productions from xylose and glucose under dark condition were enhanced by the presence of natural Fe₃O₄. The electron equivalent of H₂ fractions accounted for 4.55 % and 5.69 % of the total given xylose and glucose in the experiments without Fe₃O₄, and that were correspondingly increased to 5.14 % and 6.50 % in the experiments with 100 mg/L of Fe₃O₄, respectively. Moreover, Fe₃O₄ incre ...
xylose, etc ; biomass; biorefining; fermentation; lignocellulose; metabolic engineering; pentoses; xylitol; Show all 8 Subjects
Abstract:
... Xylose, the most abundant pentose sugar of the hemicellulosic fraction of lignocellulosic biomass, has to be utilized rationally for the commercial viability of biorefineries. An effective pre-treatment strategy for the release of xylose from the biomass and an appropriate microbe of the status of an Industrial strain for the utilization of this pentose sugar are key challenges which need special ...
xylose, etc ; acid hydrolysis; alditols; arabinoxylan; oligosaccharides; polymerization; rye; wheat; Show all 8 Subjects
Abstract:
... Arabinoxylans (AXs) display biological activities that depend on their chemical structures. To structurally characterize and distinguish AXs using a non-enzymatic approach, various TEMPO-oxidized AXs were partially acid-hydrolysed to obtain diagnostic oligosaccharides (OS). Arabinurono-xylo-oligomer alditols (AUXOS-A) with degree of polymerization 2–5, comprising one and two arabinuronic acid (Ara ...
xylose, etc ; bioprocessing; hydraulic resistance; models; oxidoreductases; sodium hydroxide; ultrafiltration; xylitol; Show all 8 Subjects
Abstract:
... Many operating parameters of ultrafiltration (UF) are playing a crucial role when using a polyethersulfone membrane to separate xylose reductase (XR) enzyme from reaction mixtures during xylitol synthesis. The present study focuses on the separation of XR enzyme using a cross-flow ultrafiltration (UF) membrane. The filtration process was analyzed using the three effective variables such as filtrat ...
xylose, etc ; biomass; catalysts; catalytic activity; corn cobs; furfural; surface area; Show all 7 Subjects
Abstract:
... In order to improve the high-value utilization of raw materials in furfural production, a solid acid catalyst based on corncob residue (S-IRCC) was synthesized using the method of impregnation–carbonization–sulfonation. The impregnation of FeCl₃ makes S-IRCC exhibit excellent surface area and catalytic activity, and S-IRCC possessing -COOH, phenolic -OH, and -SO₃H groups. The effects of reaction c ...
xylose, etc ; biorefining; crosslinking; hydrolysis; liquids; nanofiltration; pH; permeability; polyamides; porosity; Show all 10 Subjects
Abstract:
... Separation of divalent salts and small organics plays a paramount in biorefinery and food industries. Nanofiltration (NF) membranes featuring suitable pore aperture ranges enables achievement of this goal, yet it fails in attaining a high liquid permeance and selectivity due to the presence of a highly crosslinked polyamide (PA) layer. In this work, the separation efficiency of monosaccharides and ...
... Integrated bioprocess strategies may facilitate ethanol production from both C6 and C5 fractions of lignocellulosic feedstocks. We propose a new process concept, SSICF, where sugarcane bagasse is hydrolyzed simultaneously with xylose isomerization and the co-fermentation of C6 and C5 sugars. A commercial cocktail was supplemented with our multi-enzymatic system composed of three recombinant enzyme ...
xylose, etc ; arabinose; arabinoxylan; breadmaking; dough; fermentation; food chemistry; molecular weight; solubilization; Show all 9 Subjects
Abstract:
... Arabinoxylans are important for dough and breadmaking properties. It is not clear how arabinoxylans of different molecular weights behave during the breadmaking process as well as the changes in individual structures. We investigated changes in the molecular weight and structure of water-extractable arabinoxylans. It was revealed that molecules larger than high molecular weight arabinoxylans were ...
xylose, etc ; Klebsiella; anthraquinones; biodegradation; malachite green; molecular weight; peroxidase; proteome; thiols; Show all 9 Subjects
Abstract:
... In this study, an attempt was made to decipher the underlying differential response mechanism of Klebsiella sp. KL-1 induced by exposure to disparate categories of dyestuffs in xylose (Xyl) co-metabolic system. Here, representative reactive black 5 (RB5), remazol brilliant blue R (RBBR) and malachite green (MG) belonging to the azo, anthraquinone and triphenylmethane categories were employed as th ...
xylose, etc ; biosynthesis; carbon; feedstocks; hydrolysates; microbial communities; polyhydroxyalkanoates; rubber; technology; wood; Show all 10 Subjects
Abstract:
... Using co-substrate to accumulate polyhydroxyalkanoate (PHA) is an efficient approach to reduce production cost and improve yield of PHA. In the study, PHA was biosynthesized under full aerobic mode by using rubber wood hydrolysate and xylose co-substrate as the carbon source. The effects of co-substrate on PHA production, microbial community and carbon conversion were explored. The results showed ...
xylose, etc ; biobased products; catalysts; catalytic activity; furfuryl alcohol; green chemistry; research; Show all 7 Subjects
Abstract:
... Nb₂O₅-supported platinum-group metals catalysts were investigated in the one-pot aqueous-phase isomerization-dehydration-hydrogenation cascade conversion of xylose. The interplay between Nb₂O₅ acid sites and noble metal particles was discussed with a particular focus on catalyst stability. Pt/Nb₂O₅ was the best-performing catalyst for xylose upgrading regarding xylose consumption rates and high se ...