BIOMASS & BIOENERGY
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2026
·
IF 5.8
Tianhong Mei,Wugan Wei,Huabo Li,Qing Fang,Yan Fang,Xiaoqian Ren,Jianliang Zhu,Jinhua Liang
A highly defective sulfonated carbon catalyst has been successfully synthesized from beet molasses via carbonization and sulfonation. This catalyst exhibited a high acid density of 2.47 mmol/g. Prepared under optimized conditions (carbonization at 550 °C for 4 h and sulfonation at 110 °C for 8 h), the catalyst exhibited a defective carbon structure with an ID/IG ratio of 1.36 and a high specific surface area of 221.7 m 2 /g. Moreover, the optimized catalyst was used for the esterification of oleic acid with methanol to produce biodiesel. The esterification process was further optimized through single factor and RSM box-behnken design (BBD), and the oleic acid esterification rate reached a maximum of 91.57 % under optimal conditions. Furthermore, the catalyst retained 87.2 % activity after 10 cycles, demonstrating excellent stability. Fuel properties of the produced biodiesel met ASTM D6751 and GB/T 25199-2017 standards. This work presents a sustainable strategy for valorizing industrial molasses waste into an efficient solid acid catalyst, contributing to green biodiesel synthesis and biomass resource utilization.
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Journal of Food Safety and Food Quality-Archiv fur Lebensmittelhygiene
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2026
·Vol. 77
·期 1
·
IF 0.2
Congyao Wang,Yabo Fu,Yubing Zhang,Yumeng Zhu,Yanqi Li,Jiazi Shi,Li Li
Background:Strawberries is a fruit rich in various nutrients. Their thin skin structure and high respiratory activity make them susceptible to microbial contamination and rapid spoilage. Traditional preservation techniques still have limitations. Therefore, this study aims to investigate the effect of plasma-processed air (PPA) on strawberry preservation.Methods:The efficacy of plasma-processed air generated via sliding arc discharge, with treatment times of 15 s, 30 s, and 60 s, was compared to untreated controls in terms of microbial suppression and quality preservation of fresh strawberries during cold storage.Results:PPA treatment significantly reduced surface microbial colonies, with a 60 s exposure achieving the lowest colony count (1.18 log colony-forming units (CFU)/g), representing approximately a 95% reduction compared to control (2.49 log CFU/g). While PPA exposure maintained nutritional parameters (total soluble solids (TSS), titratable acid (TA), pH, ascorbic acid (ASA)) at levels not significantly different from those of the untreated fruit (p > 0.05), PPA exposure effectively mitigated quality deterioration. PPA-treated strawberries were firmer, showed better color retention and less weight loss, maintained cell membrane integrity, and had lower ethylene production (p < 0.05). Notably, shelf-life extension was dose-dependent, reaching 15, 18, and 16 days at 4 °C for the treated strawberries (15 s, 30 s, and 60 s treatments, respectively) compared to 9 days for the untreated control fruit.Conclusion:PPA can effectively extend strawberry shelf-life by maintaining fruit quality and inactivating microorganisms. Furthermore, this continuous industrialized green treatment technology could ultimately be used as a standard and applied linearly during the cold chain transportation of fresh produce.
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Foods
·
2026
·Vol. 15
·期 17
·3075
·
IF 6
Shanshan Jiang,Rongrong Wang,Huiliang Wen,Zihang Fu,Jianhua Xie
Walnut kernels are highly susceptible to lipid oxidation because of their high content of unsaturated fatty acids. This study screened five lipid-soluble antioxidants—tert-butylhydroquinone (TBHQ), butylated hydroxytoluene (BHT), propyl gallate (PG), dilauryl thiodipropionate (DLTP), and ascorbyl palmitate (AP), and further evaluated binary and ternary formulations based on BHT. Treated walnut kernels were subjected to accelerated oxidation, and the oxidative stability was assessed using peroxide value, thiobarbituric acid-reactive substances (TBARS), DPPH radical scavenging activity, electron spin resonance, fatty acid composition, thermogravimetric analysis, and sensory evaluation. Among the individual antioxidants evaluated at their respective maximum permitted concentrations, BHT showed the most consistent protective effect, with the lowest oxidation indices, the strongest DPPH radical scavenging activity, and the weakest thermally induced radical signal. The BHT + TBHQ formulation performed significantly better than BHT alone in several oxidation indices (p< 0.05). The ternary BHT + TBHQ + DLTP formulation showed the best overall performance, with antioxidant activity comparable to that of the commercial antioxidant blend and significantly lower TBARS values than the BHT + TBHQ group (p< 0.05). Linoleic, oleic, and α-linolenic acids remained at 58.78–62.54%, 17.62–21.33%, and 10.64–11.31%, respectively. No significant differences in aroma or flavor were observed among treatments (p> 0.05). These findings indicate that BHT + TBHQ + DLTP effectively improves the oxidative stability of walnut kernels during accelerated storage.
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CATALYSIS TODAY
·
2023
·
IF 5.3
Wensheng Wei,Yuxin Wang,Zizhen Yan,Jiaxiang Hou,Guangwen Xu,Lei Shi
Three quaternary ammonium ionic liquids with strong nucleophilicity and distinctive structures were synthesized with high yield and purity based on the 1,2-propylene glycol anion (CH 3 CH 2 OHCH 2 O - ) derived from transesterification products. Dimethyl carbonate (DMC) was in turn produced via a one-step reaction among propylene oxide (PO), CO 2 , and methanol (MeOH) by using the synthesized ionic liquids. The involved two-stage catalytic reaction of PO-CO 2 cycloaddition and PC-MeOH transesterification was implemented without catalyst separation. Under mild conditions, the PO conversion reached 99.0%, with a PC yield of 99.0%, and a TON value of 119.5. Following the cycloaddition, MeOH was immediately introduced to achieve a PC conversion of 71.2%, a selectivity to DMC above 99%, and a TON value of 57.4 for the transesterification reaction. The influences of temperature as well as time for cycloaddition and transesterification were investigated. Cycloaddition of CO 2 with various epoxides was also examined and all showed good performance. By taking advantage of the decomposability of as-prepared ionic liquids and the recyclability of decomposition products, a new catalyst circulation process was designed to complete the full cycle without introduction of any impurities into the product system.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 17
·9700-9708
·
IF 11.9
Ronghua Yu,Shengda Wang,Yue Zhu,Qianyu Li,Jiangan You,Jian Qiu,Yanhui Wang,Jie Liu,Tao Tang
High fire-safety is extremely required for polymer materials applied in many social environments, but the contradiction between fire-safety and processability for molecular design of intrinsic highly fire-safe polymers has remained a challenge, so perfect polymer candidates meeting the above requirements are greatly lacking. Traditional design based on scientific intuition and trial-and-error experimentation is time-consuming and rather inefficient; herein, we establish a simple material genome approach (MGA) allowing high-throughput screening of intrinsic fire-safe and processable polycarbonates (PCs). A bisphenol unit was chosen as the “gene” of PC chains, and the glass transition temperature and the total heat release were key intrinsic parameters indicative of processability and fire-safe performance, respectively. Two PCs with optimized chemical structures were successfully predicted and synthesized. More excitingly, the predicted PCs show excellent comprehensive performances, and the novel mechanism for outstanding fire-safety performance has been found. This work provides an efficient guide in the design and synthesis of processable highly fire-safe polymers.
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CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Jingwei Zhang,Yiwei Zhou,Zhuo Chen,Jianhong Xu
Gas-liquid–liquid three-phase flow in cross microchannels has been widely used in flow chemistry and process intensification. At present, the flow and mass transfer characteristics in this type of channel are not well understood. In this work, the hydrodynamics and liquid–liquid mass transfer characteristics of gas–liquid–liquid three-phase flow were systematically investigated. For the gas–liquid–liquid hydrodynamics, the general regulation laws of bubble and droplet size were obtained by considering the synergistic effect of shearing phases, and the bubble/droplet size prediction model based on the multiphase cooperative behavior was proposed, which could be used in predicting droplet/bubble size in flow systems. For the gas–liquid–liquid mass transfer process, the experimental results showed that the mass transfer coefficient first increased and then decreased with the increase of gas flow rate when the oil phase flow rate was fixed. The semi-empirical prediction formula of the mass transfer coefficient was obtained by considering the vortex strength, the interfacial area and the effective mass transfer area at the same time, which was in good agreement with the experimental results. This work could be the comprehensive study of gas–liquid–liquid three-phase flow and liquid–liquid mass transfer under gas enhancement in a cross microchannel.
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MACROMOLECULAR RAPID COMMUNICATIONS
·
2023
·Vol. 44
·期 15
·2300141
·
IF 4.6
Tianqi Liang,Qiwen Huang,Zhaoyang Wei,Weiwei Lei,Jun You,Jie Liu,Xiaoming Ren,Qunchao Zhang,Guohua Hu,Dean Shi
In order to get stable co-continuous morphology in immiscible polymer blends, besides reducing the interfacial tension, the compatibilizer should not only promote the formation of flat interface between different phases, but also not hinder the coalescence of the dispersed phase. Herein, the relationship between the morphology of the compatibilized polystyrene/nylon 6/styrene-maleic anhydride (PS/PA6/SMA) immiscible polymer blends and the structures of the in-situ formed SMA-g-PA6 graft copolymers as well as the processing conditions are studied. Two kinds of SMA are used: SMA28 (28 wt.% MAH) and SMA11 (11 wt.% MAH). After melt blending with PA6, the in-situ formed copolymer SMA28-g-PA6 has on average of four PA6 side chains, while that of SMA11-g-PA6 has only one. Dissipative particle dynamics simulation results indicate that both SMA28-g-PA6 copolymer and PS/PA6/SMA28 blends tend to form co-continuous structure, while those related to SMA11 intend to form sea-island morphologies. These results are correct only at relatively low rotor speed (60 rpm). When the rotor speed is higher (105 rpm), sea-island morphologies are obtained in SMA28 systems, while that for SMA11 ones are co-continuous. This indicates that higher shear stress can elongate the minor phase domains to form flat interfaces, while the SMA28-g-PA6 copolymers can be pulled out from the interface.
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JOURNAL OF FOOD SCIENCE
·
2023
·Vol. 88
·期 7
·2796-2806
·
IF 3.9
Xinyue Xu,Huaitian Cui,Jiaxin Xu,Zhiheng Yuan,Jun Li,Lina Yang,Shengnan Wang,He Liu,Danshi Zhu
In this study, the commercial bacteria Danisco and Bifidobacterium lactis were used to ferment soy yogurt, and then the quality of yogurt and the number of active probiotics in yogurt during storage were investigated. The results showed that the total number of viable bacteria in soy yogurt increased first and then decreased, but all of them met the standard for the number of viable bacteria in probiotic foods. The content of protein, lipid, and total sugar in soy yogurt decreased gradually with the extension of storage time. The texture, water holding capacity, and rheological properties of soy yogurt were improved within 0–10 days, and there was no significant change after 15 days. However, brightness and whiteness of yogurt were significantly reduced. Based on realizing the reuse of soy whey, this study provided a theoretical basis for the research of the shelf life of soy yogurt. Practical Application This study developed a soy yogurt with good quality and provided a theoretical basis for the study of the shelf life of soy yogurt. In addition, some technical support was provided for the reuse of soy whey.
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RSC Advances
·
2023
·Vol. 13
·期 14
·9347-9352
·
IF 3.9
Yu-Fen Bao,Yi-Jie Wang,Yu-Chen Wang,Ding-Hua Liu
In the synthesis of dimethyl carbonate (DMC) by transesterification, CH3ONa has been commonly applied as a homogeneous catalyst due to its high catalytic activity, but its stability is unsatisfactory. Here, by studying the influence of ionic liquid base strength on transesterification, we prepared an organic base catalyst, potassium imidazole (KIm), with high catalytic activity and stability, which solved the problem of catalyst deactivation in transesterification. The results showed that when KIm was used in the synthesis of DMC from propylene carbonate (PC) and methanol (MeOH), the chemical equilibrium could be reached within 3 minutes and the yield of DMC reached 73.03%, indicating that KIm performed better in transesterification than the majority of previously reported catalysts. In addition, the activity of the catalyst had hardly decreased after ten cycles of reaction, which can well meet the requirements of industrial production.
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Journal of Physical Chemistry C
·
2023
·
IF 3.7
Minglu Li,Siyu Kuang,Hai Liu,Qun Fan,Sheng Zhang,Xinbin Ma
Significant efforts have been devoted to the investigation of catalysts for converting CO2 into C2+ products. Cu catalysts are attractive for their initial selectivities but limited by the low stability over time. Herein we investigated the stability of Cu catalysts in an operating CO2RR environment. Hydroxides in electrolytes were found to play a key role in morphology evolution of Cu catalysts and thus result in decreasing Faradaic efficiencies of C2+ products. To this end, we deposited a porous carbon overlay on Cu catalysts through a thermal annealing method. Physical characterizations and electrochemical measurements showed that the morphology of Cu catalysts and Faradaic efficiencies of products were well maintained during the reaction. As evidenced by Fourier transform infrared spectroscopy with phenolphthalein as a probe, the added carbon overlay could effectively resist the influence of hydroxide corrosion on Cu catalysts. This study provides an efficient strategy to improve the stability of copper catalysts toward electrochemical CO2 reduction.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Ying Li,Jin-Hua Wang,Er-Chun Wang,Zhong-Sheng Tang,Yu Han,Xiu-Er Luo,Xin-An Zeng,Meng-Wai Woo,Zhong Han
The structure and thermal properties of pulsed electric field (PEF) assisted sodium hypochlorite oxidized starch were investigated. The carboxyl content of the oxidized starch was increased by 25 % when compared with the traditional oxidation method. Dents and cracks were evident on the surface of the PEF-pretreated starch. Compared with native starch, the peak gelatinization temperature (T p ) of PEF-assisted oxidized starch (POS) was reduced by 10.3 °C, while that of the oxidized starch without PEF treatment (NOS) was only reduced by 7.4 °C. In addition, PEF treatment further reduces the viscosity and improve the thermal stability of the starch slurry. Therefore, PEF treatment combined with hypochlorite oxidation is an effective method to prepare oxidized starch. PEF showed great potential in expanding starch modification, to promote a wider application of oxidized starch in the paper, the textile and the food industry.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Jiaqing Huang,Cailin Qiao,Xinrou Wang,Yuwei Gao,Jinsong Zhao,Huibo Luo,Yongzhong Wang,Changjun Hou,Danqun Huo
Pichia kudriavzevii was one of the important aroma-producing fungi in the solid-state fermentation of Baijiu, and immobilization was an effective strategy for improving microbial performance. Herein, P. kudriavzevii cells were immobilized in a gel network that crosslinked by chitosan and sodium alginate to form sodium alginate/chitosan- P. kudriavzevii microspheres (SA/CS-PMs). Their structural characteristics and formation processes were characterized by SEM and FT-IR. The effect of synthesis conditions on the performance of microspheres were determined by single-factor experiments. Under the optimal conditions, the SA/CS-PMs could increase the amylase activity of the fermentation broth by 57.18%, the esterase activity by 66.13%, the content of ester by 67.04%, and could be reused at least three times. Further research results indicated that the content of ester could be increased significantly in Baijiu solid-state fermentation with the SA/CS-PMs. In conclusion, the SA/CS-PMs could improve the ester production ability of P. kudriavzevii by increasing the esterase activity, which was a valuable exploration of directional biosynthesis and a feasible strategy to improve solid-state fermentation quality.
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