LWT-FOOD SCIENCE AND TECHNOLOGY
·
2023
·
IF 6
Yongshuai Jing,Shilin Zhang,Feifan Wang,Beibei Hu,Shiguo Sun,Danshen Zhang,Yuguang Zheng,Lanfang Wu
The polysaccharides of Salvia miltiorrhiza (SMP) from 10 different sources were obtained by water extraction and alcohol precipitation, and their physicochemical properties and structures were analyzed. Multidimensional fingerprints based on high-performance liquid chromatography (HPLC), high-performance gel permeation chromatography (HPGPC) and proton nuclear magnetic resonance ( 1 H-NMR) were established, and monosaccharide composition (galactose, glucose), molecular weight (SP1 2.07 × 10 6 Da-5.57 × 10 6 Da, SP3 692.20 Da–707.22 Da) and chemical shift (δ2 4.982 ppm, δ4 5.317 ppm) could be used for the quality control of SMP. The antioxidant activity was evaluated, and the spectrum effect relationship was studied. Galactose in the monosaccharide composition and the 2.07 × 10 6 Da-5.57 × 10 6 Da component in molecular weight were found to have a positive correlation effect on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging, which can provide a preliminary basis and data reference for the quality control and structure-activity relationship study of SMP.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Liangqing Zhang,Jiarong Qiu,Jiahui Deng,Shunming Song,Zelong Hong,Wenlong Jia,Suchang Huang,Xianhai Zeng
The conversion of hemicellulosic biomass to sugar alcohols commonly applies homogeneous acids and noble metals as catalysts, which is neither economical nor environmentally friendly. In order to overcome the deficiencies of the reports, a series of non-precious catalysts were synthesized through the co-precipitation method and incipient wetness impregnation (IWI) method in converting hemicellulosic biomass, i.e., hemicellulose and xylose into sugar alcohols (i.e., xylitol and arabitol). Reaction experiments showed that the Ni 8.98 Fe 1 @ 1.54SiO 2 catalyst prepared by the IWI method has excellent catalytic performance for converting xylose to sugar alcohols in the neutral aqueous solution, and can be applied to the direct conversion of hemicellulose as well. Specifically, the optimum yield of xylitol and arabitol could obtain 99.48 mol% and 26.01 mol% for xylose as the substrate and 88.16 mol% and 20.55 mol% for hemicellulose as the substrate, respectively. Characterization techniques such as X-ray diffraction (XRD), N 2 adsorption-desorption isotherm, transmission electron microscopy (TEM), scanning electron microscope (SEM), H 2 temperature-programmed reduction (H 2 -TPR), NH 3 temperature-programmed desorption (NH 3 -TPD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy of pyridine (Py-FTIR), and SQUID vibrating sample magnetometry (SQUID -VSM) were performed to study physicochemical properties of the catalyst. N 2 adsorption-desorption isotherm and NH 3 -TPD characterizations indicated that the catalyst with mesoporous properties and proper acidic sites is vital for hydrolyzing hemicellulose to pentose (i.e., xylose and arabinose). TEM, H 2 -TPR, and XPS techniques revealed that the (111) plane of metallic Ni is the main active phase for the hydrogenation of pentose into sugar alcohols, and Fe 2+ and Fe 3+ species act as effective promoters to enhance the pentose hydrogenation. Py-FTIR characterization and reaction conditions indicated that the appropriate ratio of Brønsted to Lewis acidic sites could facilitate the conversion of xylose to arabitol. The reaction mechanisms for converting hemicellulosic biomass to sugar alcohols were proposed based on the systematic study of reaction conditions and characterizations. N 2 adsorption-desorption, H 2 -TPR, and XPS indicated that the catalyst with strong metal-support interaction, large specific surface area and pore volume could be beneficial for catalytic stability, which is verified in leaching and reusability tests. The catalyst has superparamagnetic, which can be quickly separated from the reaction system under the external magnetic field, facilitating the recovery and utilization of the catalyst.
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Waste and Biomass Valorization
·
2022
·Vol. 14
·期 6
·1891-1903
·
IF 3.449
Li Yuanzhang,Xu Tingting,Lin Changqu,Xiong Hao,Bai Zhongzhong,Wu Hongli,Cao Fei,Wei Ping
Traditional Chinese Herb Residues (TCHRs) contain a large number of lignocellulosic components, such as glucan (cellulose/starch), hemicellulose, and lignin, which can be fully utilized to avoid resource wasting and environmental pollution. Herein, we chose 40 typical TCHRs to measure their lignocellulosic contents and degraded the TCHRs containing high dextran components to prepare glucose or anhydro-sugars. The average lignocellulosic content of 40 typical TCHRs was 71.48 ± 13.30% and 25 TCHRs’ lignocellulosic contents were more than 70%. Based on the lignocellulosic content and ratio of total structural carbohydrates to lignin content, 40 typical TCHRs can be divided into four categories for sugar-producing, bio-char forming, composting, and incineration. 11 TCHRs were screened for glucose preparation by enzymolysis or acidolysis, and anhydro-sugars preparation in polar aprotic solvents. The average yield of glucose from 7 starch-rich TCHRs was 87.3% by enzymolysis, and the average yield of glucose from 4 cellulose-rich TCHRs was 58.0% by acidolysis. The total carbon yield of anhydro-sugars from 7 TCHRs was over 60%. These results and classification principles have instructive significance for discharging and utilizing TCHRs. Graphical Abstract
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Meixia Xie,Jiale Cai,Xiaoting Zhong,Jiayin Liang,Shengwang Liang,Minghua Xian,Chunyan Yan,Shumei Wang
Rehmannia glutinosa Libosch is a useful crop for both industrial and medical use. Polysaccharide is one of the rich components, while its separation, purification and structural characteristics are rarely reported. In this work, two new natural polysaccharides, RGP90–1–1 and RGP90–1–2 (molecular weights 13.2 kDa and 6.2 kDa, respectively), were obtained from Rehmannia glutinosa . The structural characteristics, including monosaccharide composition, linkage, and configuration, were analyzed by HPLC, FT-IR, GC-MS NMR spectroscopy , and so on. The main component of RGP90–1–1 was arabinose , with trace amounts of glucose and xylose , with the linkages L-Ara f -(1→, →3)-L-Ara f -(1→, →5)-L-Ara f -(1→, D-Glc p -(1→, →3, 5)-L-Ara f -(1→, →2, 5)-L-Ara f -(1→, →6)-D-Glc p -(1→ and →2, 3, 4)-D-Xyl p -(1→. RGP90–1–2 consisted of large amounts of arabinose and a small amount of glucose, with linkages including L-Ara f -(1→, →3)-L-Ara f -(1→, →5)-L-Ara f -(1→, →3,5)-L-Ara f -(1→ and →6)-D-Glc p -(1→. Furthermore, inhibition experiments of α-glucosidase and α-amylase activities showed that RGP90–1–1 and RGP90–1–2 had potential hypoglycemic effects. In vitro, RGP90–1–2 dose-dependently attenuated the secretion of nitric oxide and the expression of iNOS in LPS-induced RAW264.7 inflammation model and exerted significant anti-inflammatory effects via NF-κB/IκBα pathway. The findings suggest that RGP90–1–1 and RGP90–1–2 have the potential for development into new hypoglycemic drugs or health food . It offers a scientific foundation for increasing the planting applications and public awareness of Rehmannia glutinosa .
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FITOTERAPIA
·
2023
·
IF 3.4
Yang Liu,Limei Ran,Yahong Wang,Peng Wan,Hongli Zhou
The polysaccharides from Sea buckthorn leaves (SBLPs) were extracted by hot water and purified by DEAE cellulose , then separated into six polysaccharides (SBLP-S) by DEAE-52 column. Six separated polysaccharides were characterized by Ultraviolet Spectroscopy, Infrared Spectrum, High Performance Liquid Chromatographic and Congo red analysis. The antioxidant activity and immunological activity were investigated in vitro . The results revealed that the monosaccharide composition of SBLP-S-1, SBLP-S-2, SBLP-S-3, SBLP-S-5 and SBLP-S-6 contained Man , GlcN , Rib , Rha , GluA , GalA , Glu, Gal, Xyl , Ara and Fuc , among them, rare glucosamine was found. And SBLP-S-4 contained all above components except GlcN and GluA. FT-IR showed that SBLP-S were sulfated polysaccharide containing uronic acid . Molecular weights of SBLP-S were 338.659, 401.305, 599.849, 393.904, 626.895 and 176.862 kDa. The Congo-red test indicated that SBLP-S-2, SBLP-S-4, SBLP-S-5, and SBLP-S-6 had triple helix conformation. Crude polysaccharides had the strong scavenging activities on DPPH radicals, ABTS radicals and hydroxyl radicals . The six polysaccharides had the activity of immune stimulation on RAW264.7 cell. SBLP-S-2 promoted the phagocytosis best and SBLP-S-6 promoted the NO production best. The results suggested that SBLPs could be used as potential antioxidants and immunomodulatory agents in pharmaceutical and functional food fields.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yuxiao Hu,Xueying Chen,Zhijian Tan
Ammonium sulfate and t -butanol are widely used in conventional three-phase partitioning (TPP); however, their use is not eco-friendly. In this study, a novel TPP was developed using pH-responsive deep eutectic solvents (DESs) and sugars as substitutes for t -butanol and ammonium sulfate, respectively. This TPP was further used for the separation and purification of radish ( Raphanus sativus L.) peroxidase (POD). DES-3 (dodecanoic acid: decanoic acid = 1:1) and sucrose were selected as optimal phase-forming components. Single-factor experiments were performed to investigate the factors influencing the TPP process, and three major factors (sucrose concentration, extraction time, and extraction temperature) were optimized by response surface methodology (RSM). Under the optimized conditions, the POD recovery and purification fold reached 101.66% and 11.56, respectively. Cyclic experiments confirmed the retrievability of DESs. Sodium dodecyl sulfate–polyacrylamide gel electrophoresis (SDS-PAGE) confirmed that the novel TPP had better purification efficiency than the traditional TPP. The method proposed in this study is more efficient than conventional TPP, and it does not require the use of organic solvents and high concentration salt solutions. Therefore, this method is promising in the application of TPP.
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高影响因子
BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Hossain M. Zabed,Suely Akter,Mudasir A. Dar,Jamila A. Tuly,Mukesh Kumar Aswathi,Junhua Yun,Jia Li,Xianghui Qi
This study aimed to produce enhanced fermentable sugars from a novel stover system through the bioprocessing of its soluble sugars and insoluble carbohydrates. The pretreatment conditions were optimized for this high sugar-containing stover (HSS) to control inhibitor formation and obtain enhanced fermentable sugar concentrations. The optimum temperature, acid loading, and reaction time for the pretreatment were 155 °C, 0.5%, and 30 min, respectively, providing up to 97.15% sugar yield and 76.51 g/L total sugars at 10% solid-load. Sugar concentration further increased to 126.9 g/L at 20% solid-load, generating 3.89 g/L acetate, 0.92 g/L 5-hydroxymethyl furfural, 0.82 g/L furfural, and 3.75 g/L total phenolics as inhibitors. To determine the effects of soluble sugars in HSS on fermentable sugar yield and inhibitor formation, sugar-removed HSS was further studied under the optimum conditions. Although prior removal of sugars exhibited a reduction in inhibitor generation, it also decreased total fermentable sugar production to 115.45 g/L.
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高影响因子
Biotechnology for Biofuels and Bioproducts
·
2023
·Vol. 16
·期 1
·1-12
·
IF 0
Deng Hai-Qing,Lin Xiao-Hui,Fan Jun-Tao,Fu Ping-Zhang,Guan Jia-Jun,Lei Han-Lin,Liu Li-Hao,Lai Lin-Hao,Hou Xue-Dan,Lou Wen-Yong
Background Xylo-oligomers are a kind of high value-added products in biomass fractionation. Although there are several chemical methods to obtain xylo-oligomers from biomass, the reports about the deep eutectic solvents (DESs)-mediated co-production of xylo-oligomers and fermentable sugars and the related kinetic mechanism are limited. Results In this work, glycolic acid-based DESs were used to obtain xylo-oligomers from corncob. The highest xylo-oligomers yield of 65.9% was achieved at 120 °C for 20 min, of which the functional xylo-oligosaccharides (XOSs, DP 2–5) accounted for up to 31.8%. Meanwhile, the enzymatic digestion of cellulose and xylan in residues reached 81.0% and 95.5%, respectively. Moreover, the addition of metal inorganic salts significantly accelerated the hydrolysis of xylan and even the degradation of xylo-oligomers in DES, thus resulting in higher selectivity of xylan removal. AlCl 3 showed the strongest synergistic effect with DES on accelerating the processes, while FeCl 2 is best one for xylo-oligomers accumulation, affording the highest xylo-oligomers yield of 66.1% for only 10 min. Furthermore, the kinetic study indicates that the ‘potential hydrolysis degree’ model could well describe the xylan hydrolysis processes and glycolic acid/lactic acid (3:1) is a promising solvent for xylo-oligomers production, in particular, it worked well with FeCl 2 for the excellent accumulation of xylo-oligomers. Conclusions Glycolic acid-based deep eutectic solvents can be successfully applied in corncob fractionation with excellent xylo-oligomers and fermentable sugars yields on mild conditions, and the large amount of xylo-oligosaccharides accumulation could be achieved by specific process controlling. The strategies established here can be useful for developing high-valued products from biomass.
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PubMed
CATALYSIS LETTERS
·
2023
·
IF 2.8
Zhu Peng,Han Chunyang,Xia Haian
Catalytic hydrogenolysis of xylose to ethylene glycol (EG) and 1,2-propanediol (1,2-PG) is an important way for the high-value valorization of biomass. Herein, Ni-W/CeO 2 catalysts prepared by incipient-wetness impregnation method were used for the hydrogenolysis of xylose to EG and 1,2-PG. Several characterizations such as X-ray diffraction (XRD), Transmission electron microscopy (TEM) and X-ray photoelectronic spectroscopy (XPS) were used to analyze the physicochemical properties of the catalysts. The effects of different Ni/W ratios and reaction conditions on the hydrogenolysis performance of the catalyst were investigated. The doping of W promoted the selective cleavage of C–C and C-O bonds of xylose, thus improved the yield of EG 1,2-PG. The doping of W can form interactions with Ni and increase the oxygen vacancy concentration of CeO 2 , which have a significant impact on the catalyst activity. When the Ni: W ratio is around 1:1, the catalyst has the best activity, and the total yield of diols can reach about 43.2%.. When xylan was used as the substrate, the total yield of diols can reach to 58.7%. The possible reaction mechanism of xylose hydrogenolysis was also discussed. This work developed a new catalyst system for the directional conversion of xylose to EG and 1,2-PG, which provided a new idea for the design of catalyst to converting lignocellulose, especially carbohydrate into high-value chemicals. Graphical Abstract Ni-W/CeO 2 with different Ni/W ratio are efficient catalysts for hydrogenolysis of xylose to EG and 1,2-PG.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yuchao Shao,Zhangrui Luo,Menggang Bao,Weizhong Huo,Rong Ye,Muhammad Ajmal,Wenjing Lu
Acid hydrothermal treatment of biowaste is a beneficial approach for producing hydrochar with high hydrothermal humic acid (HHA) selectivity, along with a by-product hydrothermal solution containing saccharides, furans, and aromatic compounds. Conversely, alkaline hydrothermal conditions are suitable for humification to form HHA. This study explored the recycling of hydrothermal solution as a solvent for hydrochar production, aiming to reduce salt content in wastewater and the need for acid/alkali inputs. The acidity of the recycled hydrothermal solution significantly influenced the quality of the prepared hydrochar in terms of alkaline hydrothermal humification. Insufficient solution acidity resulted in a decrease in hydrochar-derived HHA yield (65.0 wt% to 20.2 wt%). Maintaining sufficient acidity (pH 0) in the recycled hydrothermal solution not only improved the hydrochar yield (29.6 wt% to 33.1 wt%) via polymerization or condensation reactions but also maintained ab high level of hydrochar-derived HHA yield (68.2 wt% to 71.2 wt%). This can be attributed to adequate hydrolysis of biowaste and polymerization of soluble chemicals into the hydrochar. Furthermore, the total yields of hydrochar-derived and solution-derived humic substances were higher compared to values obtained without hydrothermal solution recycling. This study presents an innovative hydrothermal process for HHA production, offering cost savings and environmental benefits.
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高影响因子
DESALINATION
·
2023
·
IF 9.9
Xinxin Wei,Kaiming Fan,Peng Cheng,Yanling Liu,Shengji Xia
Simultaneous enhancement in the removal of organic micropollutants (OMPs) and water permeance is highly desirable for nanofiltration (NF)-based drinking water treatment . This study employed two cyclodextrin derivatives with different functional groups, i.e., (2-hydroxypropyl)-β-cyclodextrin (HP-β-CD) and sulfobutylether-β-cyclodextrin (SBECD), as aqueous additives for polyamide (PA) membrane fabrication. Characterization results revealed that HP-β-CD tended to enrich piperazine (PIP) monomers through hydrogen bonding, resulting in a thin but dense PA layer. Conversely, SBECD moderated PIP diffusion through electrostatic forces and steric hindrance , participated more in the interfacial polymerization reaction and yielded an active layer with a coexistence of polyester and polyamide. Both the CD derivative modified membranes exhibited improved surface hydrophilicity , enhanced roughness, and reduced active layer thickness, leading to over 60 % water permeance improvement without the obvious variation of pore size. This enabled the optimal membranes, especially the HP-β-CD incorporated one, highly advantageous in overcoming the trade-off effect between water permeance and OMP rejection. Meanwhile, the strongly negatively charged SBECD modified membrane showed reduced rejections for divalent cations, making it more resistant to scaling. This study offers an efficient approach to tailoring membrane water/solute selectivity and solute/solute selectivity, which has great potential in NF membrane development for drinking water treatment.
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高影响因子
CHEMICAL PAPERS
·
2023
·Vol. 77
·期 10
·5999-6006
·
IF 2.2
Yuan Yifan,He Fuduo,Li Xue,Xu Dehua,Yan Zhengjuan,Wang Xinlong
Corncob has a high yield and contains a large number of cellulose substances. Wet phosphoric acid hydrolysis of corncob is of great significance to the utilization of organic waste, and provides theoretical support for the development of sugar-containing synergistic phosphorus fertilizers. In this study, the kinetics of hydrolysis of corncob by wet process phosphoric acid was investigated. The time evolution of total sugar, xylose and furfural formation during a 12-h hydrolysis was simulated by Saeman and biphasic models within differential acid concentrations and temperatures. The formations of both total sugar and furfural coincide a first-order irreversible reaction, which was not applicable to the Saeman model nor the biphasic model. Meanwhile, xylose formation was more suitable for the Saeman model. The optimal conditions for xylose are: a temperature of 100 °C, a reaction time of 720 min, an acid concentration of 55.6% (w/w). The xylose yield of corncobs was 0.15 g/g in the optimal conditions. Graphical abstract
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高影响因子
危险品化学品经营许可证（带存储）