BIORESOURCE TECHNOLOGY
·
2012
·
IF 4.98
Weina Liu,Yucui Hou,Weize Wu,Muge Niu,Wenhua Wang
Efficient pretreatment is important for complete enzymatic conversion of lignocellulosic materials. Pretreatment of wheat straw with sulfur dioxide (SO 2 ) dissolved in hot water achieved xylose and total product yields of up to 61.1% and 93.9%, respectively, based on the mass of lignocellulose in wheat straw. The apparent activation energies for hemicellulose conversion and xylose dehydration were 7.8 and 9.0 kJ/mol. FT-IR spectra of the residual solid after treatment showed that the hemicellulosic components were converted, the hydrogen bonds in cellulose were broken, but the lignin structure was not changed. Importantly, the SO 2 was recovered from the product mixture by steam stripping and could be reused. Thus, the SO 2 –H 2 O system is an efficient and environmentally friendly way for the conversion of hemicellulose in wheat straw into monosaccharides, such as xylose, glucose and arabinose.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2012
·
IF 2.721
Junhua Zhang,Lu Lin,Shijie Liu
We present here the results of an investigation aimed at identifying catalysts for the dehydration of glucose and xylose to 5-hydroxymethylfurfural (HMF) and furfural in a diphasic reaction system, and the subsequent conversion of HMF and furfural to 2,5-dimethylfuran (DMF) and 2-methyl furan (MF) was also investigated. For the dehydration of glucose and xylose mixture, a series of SO42–/ZrO2–TiO2 solid acid catalysts were prepared by precipitation and impregnation method. Effects of various reaction parameters and catalyst reuse cycle toward the reaction performance were studied. Experimental results indicated that the product yield could reach 30.9 mol % (for HMF) and 54.3 mol % (for furfural) under the optimal experimental conditions. The SO42–/ZrO2–TiO2 catalyst is recoverable from the resulting product mixture and reused multiple times after calcination without any substantial change on the HMF and furfural yield. Furthermore, effects of various hydrogenation parameters of HMF and furfural in n-butanol promoted by carbon-supported ruthenium (Ru/C) were discussed, and the highest yield could reach 60.3 mol % (for DMF) and 61.9 mol % (for MF) under the optimal experimental conditions by starting with HMF and furfural in pure n-butanol, but the target products of DMF and MF could not be detected when directly used by the separated organic phase as solvent and substrate. However, the DMF and MF yield could reach 32.7 and 17.5 mol %, respectively, when the separated organic phase undergoes a further purification, which indicated that the purification of the organic phase is a key step for the further hydrogenation of HMF and furfural to DMF and MF.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Shen Jiang,Qiuyun Li,Guangrun Wu,Xuming Mu,Xiaotong Wang,Yunpeng Wang,Yanli Wu,Jing Wu,Yang Li
In the landscape of biomolecular detection, surface-enhanced Raman spectroscopy (SERS) confronts notable obstacles, particularly in the label-free detection of biomolecules, with glucose and other sugars presenting a quintessential challenge. This study heralds the development of a pioneering SERS substrate, ingeniously engineered through the self-assembly of nanoparticles of diverse sizes (Ag1@Ag2NPs). This configuration strategically induces ‘hot spots’ within the interstices of nanoparticles, markedly amplifying the detection signal. Rigorous experimental investigations affirm the platform’s rapidity, precision, and reproducibility, and the detection limit of this detection method is calculated to be 6.62 pM. Crucially, this methodology facilitates nondestructive glucose detection in simulated samples, including phosphate-buffered saline and urine. Integrating machine learning algorithms with simulated serum samples, the approach adeptly discriminates between hypoglycemic, normoglycemic, and hyperglycemic states. Moreover, the platform’s versatility extends to the detection and differentiation of monosaccharides, disaccharides, and methylated glycosides, underscoring its universality and specificity. Comparative Raman spectroscopic analysis of various carbohydrate structures elucidates the unique SERS characteristics pertinent to these molecules. This research signifies a major advance in nonchemical, label-free glucose determination with enhanced sensitivity via SERS, laying a new foundation for its application in precision medicine and advancing structural analysis in the sugar domain.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RENEWABLE ENERGY
·
2024
·
IF 9
Qiuli Xia,Lin Zhang,Peng Zhan,Zhaohui Tong,Yan Qing,Jiaying He,Zhiping Wu,Hui Wang,Lishu Shao,Na Liu
The cost-effective and low-carbon fractionation of lignocellulosic biomass will enhance the economic viability of bio-refining. To achieve efficient reed fractionation under favorable conditions, microwave-assisted choline chloride and p -toluene sulfonic acid (M-ChCl/ p -TsOH) pretreatment was employed. The fractionation of reed components demonstrated higher effectiveness with M-ChCl/ p -TsOH pretreatment compared to conventional DES pretreatment. Under M-ChCl/ p -TsOH conditions, a high hemicellulose removal rate (∼90%) and delignification rate (∼65%) were achieved while achieving a saccharification rate of 88% during cellulase hydrolysis. Microwave assistance not only significantly reduced reaction time to less than 60 s but also enhanced the pretreatment efficacy. Furthermore, the obtained lignin products consisted of low-polymerization lignin (M W < 800 g/mol) and acid-soluble lignin, providing a solid foundation for subsequent high-value utilization of lignin. This study provides a promising strategy for the low carbon fractionation of reed using DES, aiming to simultaneously achieve efficient cellulose hydrolysis and obtain tractable lignin.
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 23
·1887
·
IF 4.4
Xiaolong Qiao,Shixing Wang,Qiulian Liu,Yuanming Zhang,Guangting Han,Haoxi Ben,Wei Jiang,Haiguang Zhao,Yan Song
China is the country with the most abundant bamboo resources in the world. Using bamboo as a raw material for pulping and papermaking can save a lot of wood and protect forests. Bamboo pulping enterprises mostly adopt sulfate processes to produce a large amount of black liquor (BL), which contains monosaccharides, polysaccharides, oligosaccharides, pectin, lignin, etc. The utilization of the high-value organic matter is of great economic and environmental significance. In this study, blue-green carbon dots (C-dots) were prepared from bamboo ( Lingnania chungii ) kraft pulp BL using a hydrothermal method. The changes in carbohydrate content in BL in relation to hydrothermal temperature and hydrothermal time were discussed in detail. Then, a series of characterizations of BL-C-dots, prepared under one of the hydrothermal conditions (180 °C, 6 h), were performed and the BL-C-dots showed an excitation-dependent photoluminescence (PL) spectrum and a quantum yield (QY) of 2.9% in an aqueous solution. Finally, the as-prepared BL-C-dots were successfully used as fluorescent materials to develop an anti-counterfeiting code. The fluorescent code exhibited a clear outline, an excitation-tunable color, good stability, and high security, showing great anti-counterfeiting potential and realizing the high-value utilization of BL.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2015
·Vol. 25
·期 25
·3847-3854
·
IF 11.805
Xiangyang Zhu,Jinlou Gu,Junying Zhu,Yongsheng Li,Liming Zhao,Jianlin Shi
Introduction of accessible boronic acid functionality into metal–organic frameworks (MOFs) might to endow them with desired properties for potential applications in recognition and isolation of cis -diol containing biomolecules (CDBs). However, no investigation is found to address this topic until now. Herein, Cr-based MOFs of MIL-100 (MIL stands for Materials from Institut Lavoisier) integrated with different pendent boronic acid group (MIL-100-B) are reported. This new functional material is successfully prepared using a simple metal–ligand–fragment coassembly (MLFC) strategy with isostructure to the parent MIL-100 as verified by X-ray diffraction characterization. The integration and content tunability of the boronic acid group in the framework are confirmed by X-ray photoelectron spectroscopy and 11 B NMR. Transmission electron microscopy reveals that MIL-100-B can evolve into well-defined morphology and nanoscale size at optimized boronic acid incorporating level. The obtained MOFs exhibit comparable surface areas and pore volumes with parent MIL-100 and present exceptional chemical stability in a wide pH range. The inherent boronic acid components in MIL-100-B can effectively serve as the recognition units for the cis -diol moieties and consequently enhance the capture capabilities for CDBs. The exceptional chemical stability, high porosity, and good reusability as well as the intrinsic cis -diol moieties recognition function prefigure great potential of the current MIL-100-B in CDBs purification, sensing, and separation applications.
✓ 已验证
产品关联
DOI
高影响因子
PLANT FOODS FOR HUMAN NUTRITION
·
2016
·Vol. 71
·期 2
·123-128
·
IF 2.276
Ou Juan-ying,Huang Jun-qing,Song Yuan,Yao Sheng-wen,Peng Xi-chun,Wang Ming-fu,Ou Shi-yi
Corn bran is a byproduct produced from corn milling; it is rich in ferulic acid and hemicellulose. In this research, the effects of feruloylated oligosaccharides (FOs) from maize bran on the microbial diversity and profiles in rat feces were investigated through 16S rRNA sequencing. FOs significantly increased bacterial richness and diversity compared with the control and xylooligosaccharides (XOS) alone. In comparison with the control group and the group administrated with XOS, FOs orally administered at 300 mg/kg increased OTU in feces by 57.0 and 24.8 %, and Chao value by 93.4 and 37.6 %, respectively. FOs also influenced obesity- and diabetes-associated bacteria. Oral administration of FOs at 300 mg/kg decreased the ratio of Firmicutes to Bacteroidetes from 477.7:1 to 55.1:1; greatly increased the reads of bacteria that were previously found resistant against diabetes in rats, such as Actinobacteria , Bacteroides , and Lactobacillus ; whereas decreased diabetes-prone bacteria, such as Clostridium and Firmicutes .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2017
·
IF 3.648
Yucui Hou,Jiahe Yan,Lixia Feng,Fan Xie,Weize Wu
Rice straw is a renewable, cheap, and abundant resource in agriculture. Due to its controllable and recoverable properties, H 2 O-SO 2 system was studied as a reaction medium to hydrolyze rice straw to produce chemicals by a two-step treatment. The first-step treatment converted hemicellulose to xylose (17.1%), glucose (3.1%) and arabinose (3.5%) at 140 °C. The second-step treatment converted cellulose to glucose (10.9%) at 190 °C. The total yield of products by the two-step treatment of rice straw was 41.1%, which is more than that in the one-step treatment (21.0% at 190 °C). The apparent activation energies for hemicellulose conversion and xylose dehydration were 76.7 and 66.9 kJ/mol, respectively. The degradation products obtained from the two-step treatment are less than that from the one-step treatment.
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2017
·
IF 3.091
Haizhou Lin,Jingping Chen,Yuan Zhao,Shurong Wang
To obtain an efficient and green reaction system for the production of furfural (FF), this study investigated the use of a SO3H-functionalized ionic liquid as a catalyst for the conversion of xylose in a solvent of renewable γ-valerolactone (GVL). A high FF yield of 78.12% was obtained in this reaction system catalyzed by 1-propylsulfonic-3-methylimidazolium chloride at 140 °C. The GVL remarkably enhanced the reaction rate and increased the xylose conversion and FF yield because the solvent effect of GVL could improve the catalytic activity of the acidic protons and suppress the side reactions. In addition, the ionic liquids showed satisfactory catalytic performance in the conversion of xylose to FF due to functionalization by introducing a SO3H group. The conversion of other C5 carbohydrates (arabinose and xylan) was also tested in this system, and moderate FF yields were achieved.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2016
·
IF 5.267
Fan Xu,Yiqing Chen,Minghui Tang,Haiyan Wang,Jiang Deng,Yong Wang
Hydrothermal carbonization of biomass is an economic and sustainable technique for the fabrication of functional carbonaceous materials. However, the introduction of biomass into synthesis of ordered mesoporous carbon materials achieves slow progress due to complicated requirements. It is still challenging to prepare biomass-derived ordered mesoporous carbon materials. Herein, we report a simple and effective strategy to synthesize ordered mesoporous carbon materials from renewable and environment-friendly pentose using one-pot hydrothermal synthesis. The as-synthesized ordered mesoporous carbon materials show mesopores of two-dimensional hexagonal symmetry and rich functional groups. Mechanism studies indicate that the acid facilitates the self-assembly of carbon precursors and soft templates and therefore induced the formation of ordered mesoporous carbonaceous materials under hydrothermal conditions. This is the first report on the S0H+X–I+ self-assembly mechanism that achieves success in biomass system. In addition, the unique materials show outstanding performance as supports in catalytic hydrogenation. Significantly, this acid induced self-assembly strategy will open up new avenues for designing functional biomass-derived carbon materials.
✓ 已验证
产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2016
·
IF 3.858
Chun Chen,Bin Zhang,Xiong Fu,Li-Jun You,Arshad Mehmood Abbasi,Rui Hai Liu
The digestibility of mulberry fruit polysaccharides (MFPs) and its effect on lipid digestion were investigated in the simulated saliva, gastric and intestinal model. Results showed that the saliva, especially the salivary amylase had no effect on MFPs, while the gastric juice had greater effects on the MFPs digestion than intestinal juice, which could be evidenced from the decrease in molecular weight (Mw) from 128.7 ± 6.1, 13.6 ± 1.4 and 2.9 ± 0.1 to 84.3 ± 4.7, 5.2 ± 0.1 and 1.2 ± 0.1 KDa, respectively. It was observed that the amount of reducing ends were increased from 0.051 ± 0.003 to 0.451 ± 0.011 mM and no monosaccharide was released from the polysaccharide during the whole digestion period, indicating that gastrointestinal digestion cleaves the glycosidic bonds and produces no free monosaccharide. In addition, under the simulated saliva, gastric and intestinal digestion conditions, MFPs could reduce the rate and extent of lipid digestion in a concentration-dependent manner. Our findings provide information on the digestibility of polysaccharides from Morus nigra L. in vitro .
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2016
·
IF 3.652
Shurong Wang,Haizhou Lin,Yuan Zhao,Jingping Chen,Jinsong Zhou
Humin, a solid by-product formed during the acid-catalyzed conversion of carbohydrate to platform chemicals, can be further utilized by pyrolysis technology. In this study, two humins derived from glucose (humin-g) and xylose (humin-x) were characterized by elemental analysis, FTIR and 13 C NMR. Both humins were polymers rich in furan rings, and their carbon contents were more than 66%. Thermogravimetry and pyrolysis kinetic analyses based on Flynn-Wall-Ozawa and Friedman methods suggested that the activation energies for both humins increased as their conversion rates increased. At low conversion rates, the activation energy of humin-x was higher than that of humin-g, but this was reversed at high conversion rates. The results suggest that humin-g has better thermal stability following the removal of weak linkages at low temperature. Finally, Py-GC/MS was employed to study the product distribution from humin pyrolysis. The mechanisms for formation of typical products and the influence of temperature on product distribution are discussed.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）