INDUSTRIAL CROPS AND PRODUCTS
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2024
·
IF 5.6
Lu Wang,Limei Xiao,Shoujing Zheng,Jie Pang,Jiebo Chen
A better understanding of amino acids (AA) characteristics is beneficial for breeding, processing and storage of sugarcane. The differences and classification in AA of 10 different sugarcane varieties (S1-S10) were investigated in this study. Varieties affected components and concentrations of free AA ( p ＜ 0.05) significantly. The total AA of sugarcanes ranged from 51.44 to 781.61 mg/L, while the content of essential amino acids (EAA) was in the range of 0.72–60.98 mg/L. Glu (glutamic acid) was the most abundant free amino acids in all varieties of sugarcane except S4. Even though S6 had the highest concentration of medicinal AA (781.61 mg/L), the highest proportion of medicinal AA in total AA was found in S5 (81.76%). S6 got the highest comprehensive score in amino acids based on the results of Principal Component Analysis (PCA). The cluster analysis roughly divided the sugarcanes into 2 groups. Group Ⅰ including S1, S6, S2 and S5 got positive scores in PCA might had great edible and medicinal development and utilization value.
研究领域:
食品科学
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植物学
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2024
·
IF 5.9
Jian Yang,Daoming Chen,Meifang Cao,Xueqing Qiu,Xinping Ouyang
The catalytic dehydration of bio-derived lactic acid into acrylic acid is one of the research hotspots in the field of green chemical industry, but the selectivity of acrylic acid and the stability of catalyst still face great challenges. In this work, a modified Hβ zeolite catalyst was prepared by sequential nitric acid treatment and Rb ion-exchange for the gas phase dehydration of lactic acid to prepare acrylic acid. The nitric acid treatment increased the content of Lewis acid sites together with the decrease of the content of Bronsted acid sites, which enhanced the dehydration and hindered the decarboxylation/decarbonylation of lactic acid. Consequently, the selectivity of acrylic acid was improved. The Rb ion-exchange not only significantly decreased the density of acidic sites but also regulated the density of basic sites of the catalyst. The optimal 0.1NA-6.8Rb/Hβ catalyst treated by 0.1 mol/L of nitric acid and 6.8 wt% of Rb ion-exchange contributed to a 99.28 % conversion of lactic acid and 76.72 % yield of acrylic acid. The catalyst showed a better stability and was easy to regenerate, maintaining 87.35 % conversion of lactic acid and 62.49 % yield of acrylic acid, respectively, after two cycles of consecutive 48 h reaction.
研究领域:
绿色化学
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催化化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
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2024
·
IF 4.7
Yingdan Ye,Han Wang,Yibin Zhang,Huaiyuan Zhao,Weichen Du,Ping Chen,Zhaoyin Hou
Chemical upcycling of end-of-life plastics is an economically and environmentally feasible way to tackle plastics crisis. Among them, methanol alcoholysis of polylactic acid (PLA) is a promising approach, which can produce methyl lactate (MLA) that can be further converted to lactide to achieve a sustainable development. In this work, a series of WO x /ZrP catalysts with WO x active sites in low coverage and high surface area were synthesized via anchoring WO x species on the surface of zirconium phosphate (ZrP). Characterizations indicated that the strong interaction between WO x and ZrP promoted the formation of WO x active sites in low coverage. In particular, 10 %WO x /ZrP catalyst was highly active and stable for the alcoholysis of PLA plastics under mild conditions due to the abundant WO x active sites and strong acidity. The yield of MLA over 10 %WO x /ZrP catalyst reached 94.5 % within 4 h at 160 °C, which was superior to the performance of traditional solid acids ( α -ZrP, HZSM-5, H β and Amberlyst-45). In addition, 10 %WO x /ZrP was versatile for the alcoholysis of discarded PLA-based products and could be recycled at least five times. The prominent performance of 10 %WO x /ZrP catalyst and the possible reaction mechanism were discussed.
研究领域:
化学工程
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环境科学
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材料科学
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产品关联
DOI
高影响因子
Food Bioscience
·
2024
·
IF 4.8
Xiqian Tan,Anqi Sun,Shuaibo Gao,Fangchao Cui,Dangfeng Wang,Xuepeng Li,Jianrong Li
Hyperuricemia, a metabolic disease characterized by elevated uric acid (UA) levels due to abnormal purine metabolism, may benefit from a multi-target therapeutic approach using lactic acid bacteria (LAB). In this study, 49 strains of LAB were screened from plant and animal samples, with the top 10 strains selected via principal component analysis (PCA) based on their lipid-lowering, glucose-lowering, and obesity-inhibiting abilities to improve energy metabolism. After evaluating the hemolytic, DNase-, gelatin-, and amine-producing abilities of these strains, one strain X1 was elected for its high UA lowering ability based on the in vitro xanthine oxidase (XO) inhibition and in vivo (zebrafish model) XO reduction assay. X1 was then identified, its probiotic characteristics were investigated, and its potential anti-hyperuricemia mechanism was explored. The results showed X1 was Weissella cibaria with probiotic potential, and exhibited an in vitro XO inhibitory capacity of 57.77 ± 10.34% and reduced UA levels and XO activities by 47.30 ± 1.33% and 41.29 ± 5.26%, respectively, in a hyperuricemia zebrafish model. The anti-hyperuricemia mechanism of X1 may involve the degradation of inosine (45.26%) and guanosine (99.23%), along with the regulation of Organic anion transporter 1 (OAT1), UOX (urate oxidase), Hepatocyte nuclear factor 4 alpha (HNF4A), and Hypoxanthine-guanine phosphoribosyltransferase (HPRT) expression levels. These findings indicated that X1 has potential as a probiotic for treating hyperuricemia.
研究领域:
微生物学
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医学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Huiling Du,Jingwen Wang,Pengchao Xie,Yong Liu
S(IV)-based advanced reduction processes have been viewed as effective strategies to eliminate nitrate (NO 3 − ) from water. In this work, CaSO 3 was introduced as the slow-release source of S(IV), and the combination of UV and CaSO 3 was applied for NO 3 − reduction. 30 mg N/L of NO 3 − could be removed in the UV/CaSO 3 process after 60 min reaction; UV irradiation and hydrated electrons ( e aq − ) reduction were responsible for the NO 3 − removal. The generated nitrite (NO 2 − ) could further be removed in this process (UV/CaSO 3 ). The degradation of NO 3 − increased from 65.8% to 100% with elevating CaSO 3 dosage from 0.2 to 2 g/L, and the accumulation of NO 2 − decreased accordingly. Almost 100% removal of NO 3 − was achieved with initial pH being 3–12 without NO 2 − accumulation after reaction. The effects of anions (Cl − , CO 3 2− , and SO 4 2− ) on the NO 3 − degradation and NO 2 − accumulation in UV/CaSO 3 were negligible. Nitrogen (N 2 ) was demonstrated as the major gaseous product during the NO 3 − reduction, and nitrogen-sulfur compounds (not NO 2 − or NH 4 + ) remained the final liquid reduction products of NO 3 − . This study revealed that UV/CaSO 3 would be a promising approach to remove NO 3 − chemically and simultaneously control the NO 2 − accumulation.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
Food Packaging and Shelf Life
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2022
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IF 8.749
Huawei Zhou,Ning Yang,Jingwen Hou,Chunwei Yu,Zhu Jin,Ping Zeng,Lingxin Yang,Yuli Fu,Yuanyuan Shen,Shengrong Guo
The effects of CaCl 2 , HCl , acetic acid or citric acid on dynamic mechanical performances and physicochemical properties of sodium alginate (SA) edible films are investigated. The results showed that the storage or loss modulus of the films were greater at 33 % relative humidity (RH) and decreased much slower with temperature (30–90 ℃) at 57 % or 75 % RH after different treatments, with their glass transition temperatures shifting higher. All the treatments improved the water resistance and mechanical properties of SA films. Specifically, CaCl 2 -treated films had the lowest solubility, and highest water contact angle and tensile strength . Acetic acid-treated films had the highest elongation at break. Citric acid-treated films had the lowest equilibrium moisture content and water vapor permeability. Film surface morphology kept dense and compact after various treatments. FT-IR spectra revealed that all the acid treatments increased hydrogen-bond interaction. This work provides new information for SA edible film modification.
研究领域:
食品科学
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材料科学
✓ 已验证
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Ruru Zhou,Yuanyuan Jiang,Huaiyuan Zhao,Boyong Ye,Lina Wang,Zhaoyin Hou
Acetalization of glycerol with acetone could convert surplus glycerol into an important fuel additive (solketal). In this work, a stable solid acid catalyst was synthesized in a facile polycondensation of p -phenolsulfonic acid on KH560 modified SiO 2 (PSF/K-SiO 2 ) and used in the acetalization of glycerol at room temperature. Characterization results confirmed that PSF/K-SiO 2 possessed larger surface area and surface acidity than that of PSF resin (copolymer of p -phenolsulfonic acid and formaldehyde) and non-modified SiO 2 supported PSF resin (PSF/SiO 2 ). As a result, PSF/K-SiO 2 was extremely active and stable in the acetalization of glycerol. At 25 °C, the detected conversion of glycerol reached 86.3% with a 97.7% selectivity of solketal at 1.5 h. The best yield of solketal over PSF/K-SiO 2 could reach 93.1 g-solketal/g-cat/h, and PSF/K-SiO 2 could be recycled at least 5 times without obvious decrease in reactivity.
研究领域:
化学工程
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催化化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Ning Wang,Zhenghe Xu,Weiying Xu,Jing Xu,Yingying Chen,Min Zhang
Removals of salicylic acid (SA) and humic acid (HA) in individual and bi-component systems by coagulation employing aluminum sulfate (alum) and adsorption using magnetic chitosan (MCS), were comparatively investigated in this study. In single-component system, alum at sufficient dose (12.0 mg/L), although efficient in removing HA, was not desirable in removal of SA. Conversely, higher SA removal rate in the adsorption process was achieved due to its superior adsorption tendencies and size-exclusion effects than that of HA. Moreover, individual SA/HA by MCS adsorption fit with Freundlich isotherm model, indicating a multilayer adsorption process. In the bi-component system, the SA and HA removal rates were observed to decrease to varying extents. Dynamic floc sizes during coagulation processes were studied using a laser diffraction particle sizing device. The results demonstrated high molecular weight (MW) HA-Al(III) complex could grow into enough large size and consequently tended to separate in water; while more coagulants (>14.0 mg/L) were required in the bi-component system compared with individual HA water when the system emerged obvious flocs, which was associated with the discrepancy of charge neutralization and competition of adsorption sites. For sole adsorption, the reaction between HA and MCS was faster than that of SA, and parts of adsorption sites were preoccupied by HA and thereby result in the low SA removal efficiency. Furthermore, combination of alum and MCS could significantly enhance organic matter removal, and alum with low dose of 8.0 mg/L coupled with MCS could evidently improve flocs settlement performance and increase the floc sizes.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2019
·Vol. 21
·期 16
·4434-4442
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IF 9.405
Teng Li,Shengqin Liu,Bing Wang,Jingen Long,Jun Jiang,Ping Jin,Yao Fu,Haizhu Yu,Weiran Yang
Glycerol, generated in abundance as the by-product in the process of biodiesel production and saponification, has seen attempts to convert it into value-added chemicals. However, due to the low selectivity of hydrogenolysis of the secondary hydroxyl group, valuable 1,3-substituted chemicals are difficult to obtain from glycerol by chemocatalysis. In this work, glyceric acid (GA), a renewable biomass from glycerol, was quantitatively converted to 3-iodopropionic acid (3-IPA) at 373 K in 3 h by hydroiodic acid mediated hydrogenation. As the reductant in this process, HI is oxidized to I2 and then regenerated in situ by metal catalysts and H2. The reaction pathway was proposed by intermediate identification and verified by a kinetics study and computational method. The catalytic system was shown to be stable and can be reused several times without loss in activity. As a 1,3-substituted chemical, 3-IPA is not only a potential monomer to form poly-3-hydroxypropionic acid, but also a good platform molecule to produce useful chemicals, e.g. 3-hydroxypropionic acid (3-HPA) and acrylic acid (AA), due to its highly reactive nature.
研究领域:
化学工程
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可再生资源化学
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有机合成
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产品关联
DOI
高影响因子
CHROMATOGRAPHIA
·
2012
·Vol. 75
·期 15
·883-892
·
IF 1.195
Zhou Wei,Zhang Yanhai,Ning Suli,Li Yan,Ye Mingli,Yu Yingjia,Duan Gengli
Automated on-line SPE/multi-stage column-switching and benzoic acid-based quantitative analysis of multi-components by single-marker/respective optimal detection wavelengths-high performance liquid chromatography (QAMS/RODWs-HPLC) as a novel analysis model was reported in the study; it obtained simple, effective, very low-cost, sensitive and reliable characteristics. This method has been set up for direct analysis of syringic acid, benzoic acid, and salicylic acid in rat plasma, and its application to the pharmacokinetic study of syringic acid and salicylic acid in rats. The chromatographic separation was performed on two C18 columns with the elution of methanol and 0.5 % formic acid aqueous solution in two pump systems, detection wavelengths of 230, 236, and 275 nm, 500-μL injection volume. Their linear ranges were between 0.008 and 166.7 μg mL −1 with correlation coefficient of 0.9977–0.9997. Benzoic acid-based QAMS/RODWs-HPLC was also compared with other two quantitative analysis methods (external standard method of RODWs-HPLC, internal standard method of RODWs-HPLC) based on pharmacokinetic data; the similarities of three analytical methods in accordance with separately obtained concentrations of syringic acid and salicylic acid in rats were 0.9997–0.9999 by the cosine value method of vectorial angle. The pharmacokinetics of syringic acid and salicylic acid were simultaneously studied in SD rats following 30 mg kg −1 intragastric administration, and their pharmacokinetic parameters were also estimated. This method was successfully applied to determination of syringic acid and salicylic acid in rat plasma samples and their oral pharmacokinetics in rats.
研究领域:
分析化学
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药理学
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生物医学
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产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2021
·Vol. 23
·期 16
·5866-5874
·
IF 10.182
Lijuan Liu,Benlong Su,Qifeng Wei,Xiulian Ren
Inspired by traditional solvents for carboxylic acid extraction being not environmentally friendly, novel hydrophobic deep eutectic solvents (DESs) based on amides as hydrogen bond acceptors (HBAs) and terpenes as hydrogen bond donors (HBDs) were proposed as sustainable solvents. The structures were characterized by 1H NMR and GC-MS, meanwhile the formation mechanism was revealed by electrostatic potential (ESP) analysis. In addition, the partition coefficients and separation factors of lactic, malic, and tartaric acids (LA, MA, and TA) in novel DESs were tested by a simple solvent extraction approach. What's more, the contributions of HBAs and HBDs in improving the selective separation of carboxylic acids were confirmed by multiscale exploration and experimental research. HBAs increase the partition coefficient via forming double hydrogen bonds with LA, MA, and TA. HBDs improve the selectivity by competition with these acids. This finding can serve as a blueprint for the design of greener solvents for the selective separation of carboxylic acids in bioprocesses.
研究领域:
生物化学
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环境科学
·
绿色化学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2018
·
IF 2.196
Weiping Luo,Xiuqing Li,Dong Ruan,Kaili Xie,Bao Tao,Cancheng Guo
By using the method of dynamic laser, the solubilities of succinic acid and glutaric acid in ε-caprolactone + acetic acid mixtures and ε-caprolactone + cyclohexanone mixtures were determined under atmospheric pressure. The experimental temperature ranged from 293.35 to 340.65 K, and the mass fraction of ε-caprolactone in the solvent mixtures ranged from 0.0 to 1.0, respectively. It was found that with the increase of the temperature at constant concentration, the measured solubilities of succinic acid and glutaric acid in ε-caprolactone + acetic acid mixtures and ε-caprolactone + cyclohexanone mixtures would increase. Moreover, when the mass fraction of ε-caprolactone in ε-caprolactone + acetic acid mixtures increases at the same temperature, the measured solubilities of succinic acid and glutaric acid would decrease. However, it would increase as the mass fraction of ε-caprolactone increases for the system of ε-caprolactone + cyclohexanone at the same temperature. The experimental data were correlated by using the modified nonrandom two liquid activity coefficient model. The maximum value of average relative deviation was 1.50%.
研究领域:
化学工程
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物理化学
✓ 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）