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Recent advances in biomolecule-based films and coatings for active and smart food packaging applications

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Food Bioscience 2023年第2期52卷 1-12页

作者： Wenqi Yin Chao Qiu hangyan ji Xiaojing Li Shangyuan Sang David Julian McClements Aiquan jiao jinpeng Wang Zhengyu jin State Key Laboratory of Food Science and Technology School of Food Science and TechnologyCollaborative Innovation Center of Food Safety and Quality Control in Jiangsu ProvinceJiangnan UniversityWuxiJiangsu214122China College of Light Industry and Food Engineering Nanjing Forestry UniversityJiangsu210037China Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province College of Food and Pharmaceutical SciencesNingbo UniversityNingbo315832China Department of Food Science University of MassachusettsAmherstMA01060United States

Ideally,packaging materials should ensure the safety and quality of foods,without contributing to environmental ***,there is interest in the development of biodegradable films assembled from natural materials,such as polysaccharides,proteins,lipids,and their *** this review,the physicochemical attributes and functional characteristics of biodegradable films prepared from these food-grade natural substances are *** advances in the production of active and intelligent packaging materials are also *** packaging is designed to improve the shelf life of packaged foods by including antimicrobials or antioxidants,such as essential *** packaging is designed to provide real-time information about the quality,freshness,or safety of packaged foods by including indicators in the film that are responsive to changes in storage conditions,gas levels,pH,*** applications of intelligent and active packaging materials to fruit,vegetable,meat,seafood,and dairy products are discussed.

关键词： Biodegradable packaging Food-grade natural substances Active agents Smart packaging Food preservation

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环糊精酶改性对淀粉结构及消化特性的影响

食品与生物技术学报 2022年第11期41卷 48-56页

作者：纪杭燕金征宇食品科学与技术国家重点实验室江南大学江苏无锡214122 江南大学食品学院江苏无锡214122 江南大学食品营养与安全协同创新中心江苏无锡214122

淀粉是人类主食的主要组分和能量供应的主要来源,提升淀粉的营养品质对人体健康具有重要价值。酶法改性具有高效、专一性强和符合清洁标签等优势,是提升淀粉品质的重要手段。作者研究了环糊精葡萄糖基转移酶(Cyclodextrin glucosyltrans... 详细信息

淀粉是人类主食的主要组分和能量供应的主要来源,提升淀粉的营养品质对人体健康具有重要价值。酶法改性具有高效、专一性强和符合清洁标签等优势,是提升淀粉品质的重要手段。作者研究了环糊精葡萄糖基转移酶(Cyclodextrin glucosyltransferase,CGTase)和环糊精水解酶(Cyclodextrinase,CDase)对玉米淀粉的协同改性效果。分别采用CGTase单独添加、CGTase和CDase同时添加、CGTase和CDase顺序添加3种改性方式,并对改性后淀粉产物的结构以及消化性进行分析。结果表明,双酶改性使得产物中麦芽低聚糖比例显著提升,而对应的环糊精比例显著下降。经3种方式改性后淀粉结构发生明显解聚,DP 13~24、DP 25~36和DP> 37的链长比例下降,而DP <13的链长比例显著提升。此外,酶改性显著提升了抗性淀粉组分的含量。因此,CGTase和CDase双酶改性在提升淀粉营养品质中具有良好的应用前景。

关键词：环糊精葡萄糖基转移酶环糊精水解酶淀粉结构低聚糖淀粉消化

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Lactobacillus reuteri 1214,6-α-葡萄糖基转移酶GtfBdN改性薯类淀粉产物结构及理化特性研究

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食品与发酵工业 2021年第9期47卷 42-48页

作者：蒋彤纪杭燕柏玉香食品科学与技术国家重点实验室(江南大学) 江苏无锡214122 江南大学食品学院江苏无锡214122 江南大学食品安全与营养协同创新中心江苏无锡214122 食品安全国际联合实验室(江南大学) 江苏无锡214122

经过Lactobacillus reuteri 1214,6-α-葡萄糖基转移酶(4,6-α-glucanotransferase,4,6-α-GTase)GtfB改性淀粉可以得到一种具有益生潜力的水溶性膳食纤维。利用截断N端但高表达的全活性GtfBdN改性薯类淀粉,包括红薯淀粉、木薯淀粉和马... 详细信息

经过Lactobacillus reuteri 1214,6-α-葡萄糖基转移酶(4,6-α-glucanotransferase,4,6-α-GTase)GtfB改性淀粉可以得到一种具有益生潜力的水溶性膳食纤维。利用截断N端但高表达的全活性GtfBdN改性薯类淀粉,包括红薯淀粉、木薯淀粉和马铃薯淀粉,对产物进行结构和性质测定。通过核磁共振光谱、高效尺寸排阻色谱和高效阴离子交换色谱分析表明,GtfBdN改性分别使红薯淀粉、木薯淀粉和马铃薯淀粉中(α1→6)键比例提升至20.7%、19.5%和26.6%;产物相对分子质量减小,分子质量分布变广;聚合度>24的链段比例降低,聚合度6~12的链段比例大大增加。采用快速黏度分析仪、流变仪和差示扫描量热仪等测试发现,产物黏度大幅下降,表现出更多的流体行为,短期回生和长期回生减慢。该研究为4,6-α-GTase改性薯类淀粉在食品体系中的应用提供了理论和应用依据。

关键词： 4,6-α-葡萄糖基转移酶薯类淀粉结构分析糊化特性黏弹特性回生特性

novel amylolytic enzyme from Palaeococcus ferrophilus with malto-oligosaccharide forming ability belonging to subfamily GH13_20

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Food Bioscience 2022年第1期45卷 257-265页

作者： hangyan ji Xiaoxiao Li Tong jiang Qi Fang Yuxiang Bai jie Long Long Chen Zhengyu jin State Key Laboratory of Food Science and Technology Jiangnan UniversityWuxi214122Jiangsu ProvinceChina School of Food Science and Technology Jiangnan UniversityWuxi214122Jiangsu ProvinceChina Synergetic Innovation Center of Food Safety and Nutrition Jiangnan UniversityWuxi214122China International Joint Laboratory on Food Safety Jiangnan UniversityWuxiJiangsu214122China

By heterologous expression of a gene from Palaeococcus ferrophilus,a novel recombinant enzyme designated AMPf was obtained and proved to be an amylolytic enzyme with unique catalytic *** optimal temperature and pH of AMPf were 50℃ and 7.0 *** sequence analysis and acarbose hydrolysis ability indicated that AMPf belongs to the subfamily GH13_20,interestingly,this enzyme hardly acts on cyclodextrins and pullulan distinguishing it from most enzymes in this *** hydrolyzes starches to glucose,maltose,maltotriose,and maltotetrose as main *** mainly liberates glucose from starch with the concentration of 1%(w/v),while it shows malto-oligosaccharide forming ability with higher starch concentration of 4%(w/v).Also,the 4,6-ethylidene-4-nitrophenyl-maltoheptaose hydrolysis ability further indicates the unique combination endo-acting and glucose releasing exo-acting activtity of *** could utilize maltose and maltotriose to produce malto-oligosaccharides by transglycosylation *** was proven AMPf has application protential in malto-oligosaccharides production.

关键词： Amylolytic enzyme Catalytic charateristics Malto-oligosaccharides Palaeococcus ferrophilus

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粘贴芳玻韧布在桥梁加固工程中的实际应用

城市道桥与防洪 2008年第8期 105-107页

作者：季杭燕浙江省义乌市市政工程管理处浙江义乌322000

芳玻韧布因其强度高、延性好、性价比高等优势,近几年在桥梁加固中应用较多。该文就芳玻韧布在桥梁加固中的实际应用进行了阐述,为该项工艺在实际应用时的施工组织提供了一些经验与操作思路。

关键词：芳玻韧布桥梁加固施工组织义乌南门大桥

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酶法制备低热量淀粉及其衍生物的研究进展

食品与生物技术学报 2022年第11期41卷 31-39页

作者：陈园荟纪杭燕邱超龙杰陈龙徐振林金征宇江南大学食品学院江苏无锡214122 食品科学与技术国家重点实验室江南大学江苏无锡214122 华南农业大学食品学院广东广州510642

近年来,随着慢性病患病人数逐年增加,患病人群趋于年轻化,越来越多的人意识到健康饮食是一种预防和辅助治疗慢性病的有效手段。低热量淀粉及其衍生物因具有降低血糖血脂、改善肠道环境、促进微量元素吸收、抗消化性等功能,在食品、医药... 详细信息

近年来,随着慢性病患病人数逐年增加,患病人群趋于年轻化,越来越多的人意识到健康饮食是一种预防和辅助治疗慢性病的有效手段。低热量淀粉及其衍生物因具有降低血糖血脂、改善肠道环境、促进微量元素吸收、抗消化性等功能,在食品、医药等行业的应用越来越广泛。目前,酶法制备低热量淀粉及其衍生物已经成为一种安全、绿色、健康、高效的方法。作者概述了酶法制备低热量淀粉及其衍生物的关键酶、关键技术、功能应用等,为未来制备工艺的优化以及产品的应用提供参考。

关键词：酶法制备低热量淀粉环糊精抗性糊精

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γ-CGTase酶学性质及产物特异性影响因素

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食品与发酵工业 2020年第5期46卷 38-45页

作者：郑丹妮柏玉香纪杭燕李晓晓王禹蔣彤金征宇江南大学食品学院江苏无锡214122 食品科学与技术国家重点实验室(江南大学) 江苏无锡214122

将γ-环糊精葡萄糖基转移酶(γ-CGTase)的特有区域作为判断依据,在美国国家生物信息中心(National Center for Biotechnology Information,NCBI)数据库中,通过序列比对及生物信息学分析,筛选出一种新型基因,并将其克隆表达得到一种酶。... 详细信息

将γ-环糊精葡萄糖基转移酶(γ-CGTase)的特有区域作为判断依据,在美国国家生物信息中心(National Center for Biotechnology Information,NCBI)数据库中,通过序列比对及生物信息学分析,筛选出一种新型基因,并将其克隆表达得到一种酶。利用高效液相色谱-质谱联用进行产物鉴定,表明该酶为γ-CGTase;酶分子质量大约为80 kDa,最适温度50℃,最适pH 10.0;无α-环糊精生成;甲醇、乙醇、环己烷、十二醇激活γ-CGTase活力,异丙醇和正丁醇抑制γ-CGTase活力;反应时间、淀粉质量浓度及乙醇体积分数均会影响γ-CGTase的产物特异性。HPLC结果显示,在10%的乙醇最终体积分数条件下,γ-CGTase催化产物中γ-环糊精的比例由40.11%增加至78.20%,专一性提高了94.96%。该研究提供了一种新型的γ-CGTase,为提高γ-CGTase产物特异性提供研究基础。

关键词： γ-环糊精葡萄糖基转移酶酶学性质乙醇产物特异性

Brain age estimation:premise,promise,and problems

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Neural Regeneration Research 2025年第8期20卷 2313-2314页

作者： Jarrad Perron ji Hyun Ko Graduate Program in Biomedical Engineering Price Faculty of EngineeringUniversity of ManitobaWinnipegMBCanada PrairieNeuro Research Centre Kleysen Institute for Advanced MedicineHealth Sciences CentreWinnipegMBCanada Department of Human Anatomy and Cell Science Rady Faculty of Health SciencesUniversity of ManitobaWinnipegMBCanada

Premise:The com bined effects of modern healthcare practices which prolong lifespan and declining birthrates have created unprecedented changes in age demographics worldwide that are especially pronounced in Japan,South Korea,Europe,and North *** old age is the most significant predictor of dementia,global healthcare systems must rise to the challenge of providing care for those with neurodegenerative disorders.

关键词： estimation providing birth

Magneto‑Dielectric Synergy and Multiscale Hierarchical Structure Design Enable Flexible Multipurpose Microwave Absorption and Infrared Stealth Compatibility

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Nano-Micro Letters 2025年第2期17卷 401-416页

作者： Chen Li Leilei Liang Baoshan Zhang Yi Yang Guangbin ji School of Electronic Science and Engineering Nanjing UniversityNanjing 210093People’s Republic of China College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016People’s Republic of China

Developing advanced stealth devices to cope with radar-infrared(IR)fusion detection and diverse application scenarios is increasingly demanded,which faces significant challenges due to conflicting microwave and IR cloaking mechanisms and functional integration ***,we propose a multiscale hierarchical structure design,integrating wrinkled MXene IR shielding layer and flexible Fe_(3)O_(4)@C/PDMS microwave absorption *** top wrinkled MXene layer induces the intensive diffuse reflection effect,shielding IR radiation signals while allowing microwave to pass ***,the permeable microwaves are assimilated into the bottom Fe_(3)O_(4)@C/PDMS layer via strong magneto-electric *** theoretical and experimental optimization,the assembled stealth devices realize a near-perfect stealth capability in both X-band(8–12 GHz)and long-wave infrared(8–14μm)wavelength ***,it delivers a radar cross-section reduction of−20 dB m^(2),a large apparent temperature modulation range(ΔT=70℃),and a low average IR emissivity of ***,the optimal device demonstrates exceptional curved surface conformability,self-cleaning capability(contact angle≈129°),and abrasion resistance(recovery time≈5 s).This design strategy promotes the development of multispectral stealth technology and reinforces its applicability and durability in complex and hostile environments.

关键词： Microwave absorption Radar-infrared compatible stealth Wrinkled MXene Magneto-dielectric synergy Multifunction