Small
·
2019
·Vol. 15
·期 16
·1900110
·
IF 10.856
Xiaoxiong Zheng,Song Guan,Chen Zhang,Ting Qu,Wei Wen,Yongbin Zhao,Aihua Chen
Crosslinked liquid crystalline polymers (CLCPs) have garnered extensive attention in recent years for their significant values in the design of light-driven soft actuators. However, poor processabilities due to the insoluble and infusible crosslinked networks prevent their practical applications severely. In this study, a weldable azobenzene-containing CLCP is designed with photo- and humidity-responsive actuations, which enables a cut-and-weld process to 3D CLCP architectures. The tensile properties and stability are almost unchanged after welding, much better than those of the films pasted by common adhesive tapes. Meanwhile, the mechanisms of the welding process are clarified on the base of surface hydrogen bonding and further crosslinking. By taking advantage of the cut-and-weld process, a 3D “claw” integrated into a robotic arm is realized for grabbing millimeter-scale objects by remote control. This work enhances significantly not only the processability of CLCP films but also the utilization of leftover pieces, which provides an efficient approach to create functional 3D structures from film precursors for the potential application in the smart materials.
研究领域:
材料科学
·
高分子化学
·
软体机器人
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智能材料
·
驱动器技术
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2016
·
IF 1.207
Cunyu Li,Yun Ma,Hongyang Li,Guoping Peng
With the rapid increase of water contamination, membrane separation technology and their corresponding molecular weight cut-off (MWCO) evaluation method become more necessary. In this study, Panax notoginseng saponins was used as a new standard marker to determinate ultrafiltration (UF) membrane MWCOs, series of Millipore membranes were selected as control group to analyze and calculate the relationship between retention rate and MWCOs with exponential or logarithmic equation. A new and convenient method was provided for determining the membrane MWCO by modeling analysis retention rate with MWCOs, and the regression coefficients ≥ 0.990. The feasibility and practicability of established method was verified by different manufactures' membrane and dextrans . In the detection progress, as the main ingredient of Panax notoginseng saponins , Notoginsenoside R 1 , Ginsenoside Rg 1 , Ginsenoside Rb 1 and Ginsenoside Rd with different surface activity, the MWCO range of UF membranes can be divided into two zones mainly due to the retention rate difference among Notoginsenoside R 1 , Ginsenoside Rg 1 , Ginsenoside Rb 1 and Ginsenoside Rd . Zone I, 1000–10000; and Zone II, 10000–100000. Thus, the new method would be helpful to improve the applicability of UF membrane in separation technology.
研究领域:
环境科学
·
药学
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DOI
高影响因子
Polymers
·
2026
·Vol. 18
·期 8
·908
·
IF 5.8
Xinyu Zhang,Chu Gong,Yujie Liu,Jun Wang,Zhizhou Yang,Jun-Li Yang
Biopolymer-based packaging films possess outstanding performances and are being developed as the alternatives to traditional petroleum-based plastic packaging films with many non-ignorable shortcomings. In this study, chitosan, succinylated pullulan (SP), and berberine (BBR) were combined to fabricate novel biopolymer-based composite films (CSSPB) via the layer-by-layer assembly method. The effects of the incorporation of BBR on the physicochemical properties of the film were investigated. It was found that after BBR was added, the tensile strength (TS), elongation at break (EAB), hydrophobicity, and antioxidant capacities of the film were enhanced. The chemical bonding, crystalline properties, elemental composition, and thermal stability of the films were also characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA), respectively. The in vitro antifungal tests revealed the antifungal activities of the films with a relatively high BBR content againstColletotrichum gloeosporioides(CG). In the preservation experiments, the CSSPB films exhibited preservation effects on fresh-cut apples, which manifested as delaying browning, weight loss, an increase in the soluble solids content, and a decrease in hardness. The new CSSPB composite films were opined to hold application potential in the field of food packaging.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Guichen Liu,Rong Liu,Chengyu Fu,Xiang Hu,Ke Li,Luke Yan,Peng Yang,Jian Zhao
The increasing pace of modern life has led to the widespread popularity of fresh-cut fruits among consumers. However, their susceptibility to spoilage and short shelf life remains a significant challenge. Thus, there is an urgent need for simple, eco-friendly, low-cost, and energy-efficient preservation strategies. Herein, we report a novel method based on amyloid-like protein aggregation. Fresh-cut fruits are immersed in an aqueous solution containing lysozyme, L-cysteine, and pectin under ambient conditions, forming a ~ 12 nm thick, transparent, and colorless proteinaceous nanocoating embedded with pectin on the fruit surface. This nanocoating preserves the fruit's natural appearance and visual appeal while forming an ordered amyloid-like structure that strongly adheres to moist surfaces and offers excellent barrier properties. When applied to polyethylene (PE) film, the nanocoating reduces O 2 , CO 2 , and water vapor permeability of PE film by 48%, 62%, and 17%, respectively. In addition, the lysozyme-based coating provides effective protection against microbial contamination. Compared to untreated apples, coated samples exhibit a slower deterioration rate and an extended shelf life from 2 to 4 days at room temperature, as demonstrated by delayed weight loss, reduced firmness loss, and inhibited browning. Biochemical assays show minimal increases in malondialdehyde, polyphenol oxidase, and peroxidase levels during storage, indicating attenuation of oxidative and enzymatic degradation. Meanwhile, total soluble solids and vitamin C levels remain largely stable. In vitro cytotoxicity assays and mice feeding studies confirm the nanocoating's safety and edibility. This versatile, sustainable approach is broadly applicable to fresh-cut fruits and vegetables and offers a promising biomass-based solution to help reduce global food waste.
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产品关联
DOI
高影响因子
Biomass Conversion and Biorefinery
·
2024
·
IF 3.5
Mao Wenlong,Yao Zheng,Zhang Hua,Liao Huiyun,Li Jiang,Xue Dong,Yuan Guangxiang,Xu Baoming,Dou Kunpeng,Sheng Shijie,Xu Chao,Pang Junran,Tan Xiaoyan,Chi Bo,Xiong Dangan
On the basis of the relationship between the composition of the reconstituted cut stems and their functional positioning in the leaf formulation, this study improves the proportion of high-quality tobacco products by investigating the material basis of the effect of reconstituted cut stems on the quality of cigarette products, by characterizing the starch content, physicochemical properties, and characteristic structures of different components in tobacco products. The results showed that the starch content in reconstituted cut stems (4.93 ± 0.27%) was between high-quality tobacco leaves (4.48 ± 0.17%) and cut stems (5.13 ± 0.18%), indicating that the reduction of starch content during the processing of reconstituted cut stems is more conducive to the high-value treatment of reconstituted cut stems. At the same time, through the evaluation of the physico-chemical properties and multi-scale structural characteristics of starch particles, it was found that the starch of the reconstituted cut stems has a rock-like particle structure, and the short-range ordering on the surface increases, forming more ordered structural domains. In addition, the processed reconstituted cut stems increase the crystallinity of the starch. It also exhibits the typical B-type crystalline structure of starch, with stronger molecular chain interactions and high crystalline ordered arrangement. This study will provide technical guidance and theoretical support for improving the quality of reconstituted cut stems products, improving the bioavailability of tobacco products, reducing raw material costs, and effectively reducing the starch content of tobacco in the development of tobacco products.
研究领域:
植物学
·
食品科学
·
材料科学
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产品关联
DOI
高影响因子
FOOD CONTROL
·
2021
·
IF 5.548
Jingxin Chen,Ankang Wu,Mingliang Yang,Yonghong Ge,Penta Pristijono,Jianrong Li,Baocheng Xu,Hongbo Mi
The non-antibacterial and relatively poor mechanical properties of sodium alginate film limit its application for fresh-cut fruit packaging. The phenolic compound thymol has prominent antioxidant and antibacterial activities. The physical and functional properties of thymol/sodium alginate composite films and their ability to preserve fresh-cut apples were investigated. Thymol/sodium alginate composite films were observed to have high tensile strength, elongation at break and UV–vis light blocking capability, but low water vapor permeability, water solubility, and swelling ratio compared with standard sodium alginate film without thymol. The composite films also showed notable scavenging activity against 1,1-diphenyl-2-picrylhydrazyl radicals. In addition, the composite films exhibited remarkable inhibition of the growth of Staphylococcus aureus and Escherichia coli . Furthermore, thymol/sodium alginate films could effectively reduce weight loss, retain nutrition and surface color of fresh-cut apple slices. Therefore, sodium alginate films with thymol have strong potential as a cling wrap material used in the packaging of fresh-cut fruits.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2023
·
IF 7
Lin-Jun Wang,Qiu-Han Bai,Qiu-Xia Pan,Yi-Feng Wu,Ting-Ting Shao,Yi-Wen Guo,Wen-Shuang Wei,Yi-Ting Wen,Wei-Ming Chai
The anti-tyrosinase mechanism of esculetin has been systematically investigated by various spectroscopic techniques and molecular simulation. And the outcomes confirmed that esculetin was a competitive and excellent tyrosinase inhibitor ( IC 50 =43 ± 0.5 µmol L −1 ). The binding of esculetin to tyrosinase affected the hydrophobic microenvironment of the enzyme and altered its conformation. Thermodynamic analysis and molecular docking demonstrated that the binding was driven by hydrophobic interaction and hydrogen bonding. Circular dichroism and molecular dynamic analysis revealed that esculetin induced the structural stretching of tyrosinase and slightly impacted the microenvironment of amino acid residues. Cell assays further demonstrated that esculetin inhibited intracellular tyrosinase activity and melanin production but showed no significant effect on cell proliferation . Additionally, studies on browning inhibition indicated that esculetin delayed the browning of fresh-cut apples by suppressing phenolic metabolism, strengthening antioxidant systems, and reducing membrane-lipid peroxidation. The above discoveries offered new viewpoints for understanding the suppressive mechanism of esculetin on tyrosinase and browning, as well as scientific evidence for its potential application in food preservation and medicine.
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Xu Dong,Liping Chen,Danjie Xu,Jian Zhang,Fang Hu,Qingwei Ping
Considering the non-renewable and non-biodegradable characteristics of conventional petroleum-based plastic films, their widespread use contributes significantly to environmental degradation. This study utilizes a green synthesis citrate-based chemical cross-linking strategy to improve the dispersion of ethanol lignin within the film, thereby promoting the development of a natural, safe, renewable, biodegradable, and environmentally friendly biomass-based functional food packaging material. A novel, multifunctional green food preservation film (ELA x C) was synthesized by employing CMC film as the substrate, ethanol lignin (EL) as the functional agent, and citric acid (CA) as the cross-linking agent. The influence of CA addition on the properties of the film was systematically examined. The results indicated that the ELA 0.2 C film exhibited an optimal elongation at a break of 8.0 %, a tensile strength of 28.49 MPa, and outstanding UV-blocking performance, effectively blocking 100 % of UVB and 99.2 % of UVA radiation. Furthermore, the ELA 0.2 C film exhibits antioxidant properties, gas barrier performance, and biodegradability. This film demonstrates significant potential as a multifunctional cling film for apple slices. Moreover, EL can be directly applied as a functional agent without the need for re-dissolution, thereby offering an innovative pathway for the efficient and environmentally sustainable utilization of lignin.
研究领域:
食品科学与技术
·
高分子材料
·
绿色化学
·
可持续包装
·
木质素利用
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Yujia Xu,Dan Wang,Wenting Zhao,Yanyan Zheng,Yubin Wang,Pan Wang,Yue Ma,Xiaoyan Zhao
Ascorbic acid (AsA) is generally used as an antibrowning agent for fresh-cut potato (FCP). However, its browning inhibitory effect is temporary because of its rapid consumption during redox processes. In this study, the effect of browning inhibition in FCP slices was evaluated using low frequency ultrasound (LFU; 40 kHz, 200 W, 3 min) and AsA (0.2%, w/v) treatments alone or in combination. The results showed that LFU combined with AsA (LFU-AsA) treatment could achieve a better antibrowning effect than either treatment alone (higher L* , lower a* and Δ E* ), and there was no adverse effect on texture properties. LFU-AsA treatment not only inhibited the activity of PPO more effectively than AsA treatment, but also enhanced the antibrowning effect by retaining higher AsA content. Moreover, it also maintained membrane integrity by limiting lipid peroxidation and solute migration during storage. Overall, LFU-AsA treatment would be a promising method in food preservation industries.
研究领域:
食品科学
·
生物化学
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DOI
PubMed
高影响因子
Coatings
·
2022
·Vol. 12
·期 2
·159
·
IF 3.236
Qiaomei Ru,Qiong Hu,Chengen Dai,Xuebing Zhang,Yan Wang
The objective was to elucidate the influences ofLaurus nobilisessential oil nanoemulsion on the quality properties of fresh-cut muskmelons (Cucumis meloL.) stored at 4 °C for 8 days. TheL. nobilisoil nanoemulsion coating can inhibit changes in the browning index and titratable acidity level of muskmelon samples. The browning index in the slices treated withL. nobilisoil nanoemulsion was 0.095 ± 0.007, as compared with that of the control (0.314 ± 0.018). Meanwhile,L. nobilisoil nanoemulsion treatment maintained total phenolic content, with values ranging from 11.13 ± 0.74 mg GAE/g FW to 9.47 ± 0.75 mg GAE/g FW and inhibited the activities of related enzymes, such as polyphenol oxidase, peroxidase and antioxidant enzymes (catalase and peroxidase). Moreover, the application ofL. nobilisoil nanoemulsion inhibited the proliferation of spoilage microorganisms. The population of the aerobic bacteria of the muskmelon samples subjected toL. nobilisoil nanoemulsion treatment was 5.14 ± 0.47 log CFU/g FW, whereas that of the control was 9.42 ± 0.88 log CFU/g FW after 8 days. Therefore, the testedL. nobilisoil nanoemulsion may contribute to the inhibition of surface browning and enhancement of the shelf life of fresh-cut muskmelons for eight days at refrigerator temperature.Keywords:Laurus nobilisessential oil;nanoemulsion;fresh-cut muskmelon;browning inhibition;shelf life
研究领域:
食品科学
·
采后技术
·
纳米技术
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DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 21
·12788
·
IF 6.208
Chichang Chen,Ye Wang,Li Xu,Siwen Wang,Xiangning Chen,Yuanyue Shen
The surface of fresh-cut carrots is apt to white blush, however the physiological and molecular mechanism for this process is not yet fully understood. In this study, exogenous abscisic acid (ABA) and ethylene separately promoted and inhibited the white-blush formation after three days after treatment, respectively. Metabolome analysis found that white-blush components mainly consist of p-hydroxyphenyl lignin and guaiacyl lignin. Transcriptome analysis found an increase in the whiteness values was consistent with the higher expression of genes encoding O-methyltransferase, trans-anol O-methyltransferase, bergaptol O-methyltransferase, caffeic acid 3-O-methyltransferase, phenylalanine ammonia-lyase, and ferulate-5-hydroxylase, together with the lower expression of genes encoding cinnamic acid 4-hydroxylase caffeoyl-CoA O-methyltransferase and 5-O-(4-coumaroyl)-D-quinate 3′-monooxygenase. In conclusion, ABA plays an important role in lignin biosynthesis essential to the formation of white blush in fresh-cut carrots. This is the first report that uncovers the physiological and molecular causes of white blush in fresh-cut carrots, providing a basis for white-blush control in fresh-cut carrots.Keywords:white blush;carotenoids;lignin;molecular mechanisms
研究领域:
植物生理学
·
分子生物学
·
食品科学
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2022
·
IF 8.008
Yulin Zhai,Guoli Li,Kai Peng,Zhaosong Ge,Weibing Zhang,Duxin Li
The resolving power of multiple dimensional liquid chromatography (mD-LC) is multiplicative as it adds dimensions. However, the issue in creating a preparative mD-LC system is that the higher the dimensionality, the more complicated the system configuration. Thus, we presented a new configuration of preparative mD-LC using one set of LC modules and trapping array-based multiple heart-cut interfaces. A preparative two-dimensional liquid chromatography (2D-LC) separation of herbal medicine formulation produced 40 compounds with a purity of >90%. During the separation process, the interface stores the fractions and allocates positions for the fractions from a different dimension; LC draws the fraction from the interface, makes nD separation, and sends isolated fractions to the interface. By repeating this process, we achieved variable dimensionality of LC separations. We also presented a preparative 3D-LC separation of herbal medicines to validate the principle of “less configuration and more dimensionality”. Thus, we can explore the higher dimensional preparative separations. The developed preparative mD-LC displayed exceptional power in the isolation of various compounds and has great potential in the application of natural products.
研究领域:
分析化学
·
天然产物化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）