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Effect of sodium starch octenyl succinate-based Pickering emulsion on the physicochemical properties of hairtail myofibrillar protein gel subjected to multiple freeze-thaw cycles

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Food Science and Human Wellness 2024年第2期13卷 1018-1028页

作者： Huinan Wang Jiaxin Zhang xinran liu Jinxiang Wang Xuepeng li Jianrong li Key Laboratory of Food Nutrition and Safety Ministry of EducationCollege of Food Science and EngineeringTianjin University of Science and TechnologyTianjin 300457China College of Food Science and Technology Bohai UniversityNational R&D Branch Center of Surimi and Surimi Products ProcessingJinzhou 121013China

A Pickering emulsion based on sodium starch octenyl succinate(SSOS)was prepared and its effects on the physicochemical properties of hairtail myofibrillar protein gels(MPGs)subjected to multiple freeze-thaw(F-T)cycles were investigated.The whiteness,water-holding capacity,storage modulus(G')and texture properties of the MPGs were significantly improved by adding 1%-2%Pickering emulsion(Plix content decreased by 10.37%,while theβ-sheet content increased by 7.94%,compared to the control.After F-T cycles,the structure of the MPGs was destroyed,with an increase in hardness and a decrease in whiteness and water-holding capacity,however,the quality degradation of MPGs was reduced with 1%-2%Pickering emulsion.These findings demonstrated that SSOS-Pickering emulsions,as potential fat substitutes,can enhance the gel properties and the F-T stability of MPGs.

关键词： Pickering emulsion Myofibrillar protein Gel properties Freeze-thaw stability Intermolecular interactions

Effective peroxydisulfate activation by CQDs-MnFe_(2)O_(4)@ZIF-8 catalyst for complementary degradation of bisphenol A by free radicals and non-radical pathways

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Chinese Chemical Letters 2024年第5期35卷 371-379页

作者： Shuo li xinran liu Yongjie Zheng Jun Ma Shijie You Heshan Zheng College of Chemistry and Chemical Engineering Qiqihar UniversityQiqihar 161006China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China

The present study reported fabrication of novel carbon quantum dots-MnFe_(2)O_(4)@ZIF-8(CQDs-MFO@ZIF-8)by using co-precipitation hydrothermal method for activation of peroxydisulfate(PDS)to degrade bisphenol A(BPA),one of important emerging organic pollutants in water environment.CQDs-MFO@ZIF-8 served as a highly efficient thermal activated PDS catalyst with high catalytic degradation efficiency,reusability and stability.The catalyst achieved almost completely removal of 20.0 mg/L BPA within 5.0 min,and the degradation efficiency remained higher than 83%after 5 consecutive cycles.Free radicals(^(·)OH,SO_(4)^(·-)and^(·)O_(2)^(-))and non-free radicals((1)O_(2))were generated in the thermal PDS-activation system,in which singlet oxygen((1)O_(2))played a dominant role in the degradation of BPA.The potential toxicity of BPA degradation intermediates was analyzed upon the culture of E.coli and Chlorella sorokiniana by using Ecological Structure-Activity Relationship Model(ECOSAR)program.The catalytic performances of BPA degradation by CQDs-MFO@ZIF-8 were evaluated for treatment of different practical water samples to further verify the feasibility of practical applications.This study provides proof-in-concept demonstration of new nanomaterials for enhanced catalytic water decontamination.

关键词： Bisphenol A Degradation Peroxydisulfate ^(1)O_(2) Toxicity analysis

Relative Content of Phenoxyethanol and p-Hydroxyacetophenone in Water Phase of Oil-water Systems and Their Relevant Control Parameters

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China Detergent & Cosmetics 2016年第4期1卷 43-49页

作者： Xiaoling Qiao Ping Cao Yuanhua Cong Chunbo Feng Zhitao Chen Xuepu li lingling Zhang Qin Zhu Zheng Wang xinran li Shanghai Jahwa United Co. Ltd.

In emulsion system, micro-organisms survive in water phase, thus concentration of preservative in water phase directly reflects to anti-fungi efficacy. As preservative easily migrates into oil phase, it reduces preservative efficacy. A common solution is to increase preservative amount in the whole system. However this way always brings safety issues as preservative is a major allergen. Another effective but safety way is to prohibit preservative migrating into oil phase. In cosmetic research area, phenoxyethanol（PE） and p-Hydroxyacetophenone（p-HAP） pair gradually emerges to be a popular preservative candidate. Thus this new preservative system has been focused as the research object in this work. The relative contents（C） of both PE(CPE) and p-HAP(Cp-HAP) in water phase has been carefully determined. Eight commonly used oils have been further employed to check CPEand Cp-HAPin different oil-water system. The other influence parameters such as polyols, processing parameters are also investigated. Results shows squalane, petrolatum, silicone oil and hydrogenated polyisobutene might be good oil phase candidates for formulation when using PE and p-HAP preservative system. In these oil systems, PE and p-HAP are mainly located in water phase. Besides, increasing percentage of 1, 3-butylene glycol, shortening homogenization time or adding preservatives at the end of processing under lower temperature could effectively increase effective content preservatives in water phase, either.

关键词：乳液体系防腐剂化工行业发展现状

四氢嘧啶对HaCaT细胞活力及AQP3、Claudin-1、ZO-1表达的影响

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中国高原医学与生物学杂志 2024年第2期45卷 131-137页

作者：高翔严雅军徐烁乔丽娟李欣冉朱德锐青海大学医学部基础医学研究中心西宁810016

目的研究四氢嘧啶(Ectoine)对人角质形成细胞(HaCaT)的细胞活力、细胞凋亡率和细胞活性氧(ROS)的影响,并分析水通道蛋白3(AQP3)、紧密连接蛋白-1(Claudin-1)、闭锁连接蛋白(ZO-1)的表达水平。方法设置Ectoine浓度实验组和空白对照组,培... 详细信息

目的研究四氢嘧啶(Ectoine)对人角质形成细胞(HaCaT)的细胞活力、细胞凋亡率和细胞活性氧(ROS)的影响,并分析水通道蛋白3(AQP3)、紧密连接蛋白-1(Claudin-1)、闭锁连接蛋白(ZO-1)的表达水平。方法设置Ectoine浓度实验组和空白对照组,培养HaCaT细胞(24 h),采用CCK8法检测HaCaT细胞的细胞活力,甄选最佳的Ectoine作用浓度。用Western Blot法检测HaCaT细胞的AQP3、Claudin-1、ZO-1表达水平;用流式细胞仪检测HaCaT细胞的凋亡率及胞内ROS水平。结果CCK8法检测结果显示,0.10%Ectoine组、0.20%Ectoine组、0.30%Ectoine组的HaCaT细胞活力均高于120%,其中0.20%Ectoine组最高(146.92%±7.67%)。Ectoine浓度实验组相对于空白对照组,HaCaT细胞的AQP3、Claudin-1、ZO-1表达水平明显升高(P<0.05),且细胞凋亡率和胞内ROS水平均明显降低(P<0.05)。结论Ectoine可提高HaCaT细胞的细胞活力,降低凋亡率和胞内ROS水平,上调AQP3、Claudin-1、ZO-1表达水平。Ectoine可能与相关保湿蛋白的表达相关,对HaCaT细胞具有一定的保护作用。

关键词：四氢嘧啶人角质形成细胞水通道蛋白3 紧密连接蛋白-1 闭锁连接蛋白

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果蝇在阿尔茨海默病研究中的应用

国际老年医学杂志 2024年第2期45卷 221-224页

作者：马慧颖张晓芸张力元李芳羽李欣然朱明雪杨利敏大连大学医学院人体解剖学与组织胚胎学教研室大连116622 大连市慢性病研究中心大连116622

阿尔茨海默病(AD)是较为常见的慢性神经退行性改变。果蝇遗传背景清晰、实验操作简便、与人类疾病有关的基因或是与其高度相似的同源基因都可以在果蝇体内找到。利用果蝇经典的半乳糖调节上游启动子元件4-上游激活序列(GAL4-UAS)系统已... 详细信息

阿尔茨海默病(AD)是较为常见的慢性神经退行性改变。果蝇遗传背景清晰、实验操作简便、与人类疾病有关的基因或是与其高度相似的同源基因都可以在果蝇体内找到。利用果蝇经典的半乳糖调节上游启动子元件4-上游激活序列(GAL4-UAS)系统已建立了多种AD果蝇模型,开展了AD的分子机制及药物筛选研究。本文针对不同类型的AD果蝇模型的制备原理、方法及应用作一综述,为利用果蝇进行AD研究提供思路。

关键词：阿尔茨海默病黑腹果蝇 GAL4-UAS系统

Across two phylogeographic breaks: Quaternary evolutionary history of a mountain aspen (Populus rotundifolia) in the Hengduan Mountains

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Plant Diversity 2024年第3期46卷 321-332页

作者： Jieshi Tang Xiaoyan Fan Richard I.Milne Heng Yang Wenjing Tao xinran Zhang Mengyun Guo Jialiang li Kangshan Mao Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education College of Life SciencesState Key Laboratory of Hydraulics and Mountain River EngineeringSichuan UniversityChengdu 610065PR China Institute of Molecular Plant Sciences University of EdinburghEdinburgh EH93JHUK School of Ecology and Environment Tibet UniversityLhasa 850000PR China

Biogeographical barriers to gene flow are central to plant phylogeography.In East Asia,plant distribution is greatly influenced by two phylogeographic breaks,the Mekong-Salween Divide and Tanaka-Kaiyong line,however,few studies have investigated how these barriers affect the genetic diversity of species that are distributed across both.Here we used 14 microsatellite loci and four chloroplast DNA fragments to examine genetic diversity and distribution patterns of 49 populations of Populus rotundifolia,a species that spans both the Mekong-Salween Divide and the Tanaka-Kaiyong line in southwestern China.Demographic and migration hypotheses were tested using coalescent-based approaches.limited historical gene flow was observed between the western and eastern groups of P.rotundifolia,but substantial flow occurred across both the Mekong-Salween Divide and Tanaka-Kaiyong line,manifesting in clear admixture and high genetic diversity in the central group.Wind-borne pollen and seeds may have facilitated the dispersal of P.rotundifolia following prevalent northwest winds in the spring.We also found that the Hengduan Mountains,where multiple genetic barriers were detected,acted on the whole as a barrier between the western and eastern groups of P.rotundifolia.Ecological niche modeling suggested that P.rotundifolia has undergone range expansion since the last glacial maximum,and demographic reconstruction indicated an earlier population expansion around 600 Ka.The phylogeographic pattern of P.rotundifolia reflects the interplay of biological traits,wind patterns,barriers,niche differentiation,and Quaternary climate history.This study emphasizes the need for multiple lines of evidence in understanding the Quaternary evolution of plants in topographically complex areas.

关键词： Chloroplast DNA Microsatellite Phylogeographic break Populus rotundifolia Quaternary history Wind direction

Distribution of Protists in the Deep South China Sea Revealed by High-Throughput Sequencing

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Journal of Ocean University of China 2020年第1期19卷 161-170页

作者： li xinran WARREN Alan JIAO Nianzhi XU Dapeng State Key Laboratory of Marine Environmental Science Institute of Marine Microbes and EcospheresCollege of Ocean and Earth SciencesXiamen UniversityXiamen 361102China Department of life Sciences Natural History MuseumLondonSW75BDUK

Protists(microbial eukaryotes)are indispensable members of the marine microbial food web.In recent years,organisms living in the deep sea(>1000 m water depth)have increasingly become the focus of research;however,studies on protistan assemblages are relatively scarce compared with their prokaryotic counterparts.In the present study,high-throughput sequencing of the hypervariable V9 region of the 18S rRNA gene was used to explore the community composition of protists in bathypelagic waters of the South China Sea.Based on the analysis of the alpha and beta diversities of 14 samples,we discovered:1、members belonging to Rhizaria,Alveolata,and Excavata were the dominant groups in terms of both relative sequence abundance and operational taxonomic unit(OTU)richness in all samples,although their relative contributions differed among different samples;2、cluster analysis showed that the distribution of protistan assemblages was related neither to the sampling location nor to the water depth,and other environmental factors might have caused the differences among the communities;3、phototrophs,including members of the Bacillariophyta,Bolidophyceae,Dictyochophyceae,Prasinophyceae,and Prymnesiophyceae,were detected in all samples,which indicated their contributions to the downward transportation via the biological pump and the potential presence of phagotrophy of these phototrophic cells in the deep ocean.

关键词： bathypelagic water diversity microbial eukaryotes SSU rRNA gene

High photoelectric conversion efficiency and fast relaxation time of FA_(0.4)MA_(0.6)PbI_(3) applied in ultrafast modulation of terahertz waves

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Journal of Energy Chemistry 2024年第4期91卷 299-305页

作者： Zhibo Xu Ying Zeng xinran Zhao Xiaoyin Chen Aoyu Fan Furi ling Jiang li Jianquan Yao School of Optics and Electronic Information Huazhong University of Science and TechnologyWuhan 430074HubeiChina College of Precision Instrument and Optoelectronics Engineering Tianjin UniversityTianjin 300072China Institute of Fluid Physics China Academy of Engineering PhysicsMianyang 621900SichuanChina School of Information Engineering Wuhan University of TechnologyWuhan 430070HubeiChina National Engineering Research Center of Fiber Optic Sensing Technology and Networks Wuhan University of TechnologyWuhan 430070HubeiChina Hubei Key Laboratory of Broadband Wireless Communication and Sensor Networks Wuhan 430070HubeiChina

Active control of terahertz(THz)waves is attracting tremendous attentions in terahertz communications and active photonic devices.Perovskite,due to its excellent photoelectric conversion performance and simple manufacturing process,has emerged as a promising candidate for optoelectronic applications.However,the exploration of perovskites in optically controlled THz modulators is still limited.In this work,the photoelectric properties and carrier dynamics of FA_(0.4)MA_(0.6)PbI_(3)perovskite films were investigated by optical pumped terahertz probe(OPTP)system.The ultrafast carrier dynamics reveal that FA_(0.4)MA_(0.6)PbI_(3)thin film exhibits rapid switching and relaxation time within picosecond level,suggesting that FA_(0.4)MA_(0.6)PbI_(3)is an ideal candidate for active THz devices with ultrafast response.Furthermore,as a proof of concept,a FA_(0.4)MA_(0.6)PbI_(3)-based metadevice with integrating plasma-induced transparency(PIT)effect was fabricated to achieve ultrafast modulation of THz wave.The experimental results demonstrated that the switching time of FA_(0.4)MA_(0.6)PbI_(3)-based THz modulator is near to 3.5 ps,and the threshold of optical pump is as low as 12.7μJ cm^(-2).The simulation results attribute the mechanism of ultrafast THz modulation to photo-induced free carriers in the FA_(0.4)MA_(0.6)PbI_(3)layer,which progressively shorten the capacitive gap of PIT resonator.This study not only illuminates the potential of FA_(0.4)MA_(0.6)PbI_(3)in THz modulation,but also contributes to the field of ultrafast photonic devices.

关键词： Terahertz modulation Perovskites Metamaterials Plasmon-induced transparency

等离子冲击波作用下红砂岩的动态破裂行为试验与数值模拟研究

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有色金属（矿山部分） 2024年第3期76卷 170-177,185页

作者：李欣冉饶珂嘉苏贺侯雨函冯茂根彭建宇张凤鹏东北大学深部金属矿山安全开采教育部重点实验室沈阳110819 东北大学信息科学与工程学院沈阳110819

为了研究等离子冲击波作用下岩石的破裂行为,开展了不同放电间距下的高压脉冲击穿红砂岩试验。利用超高速相机观测了红砂岩试件的裂纹扩展过程,讨论了放电间距对等离子冲击波作用下红砂岩试样表面裂纹密度的影响。随后,利用数值模拟软件... 详细信息

为了研究等离子冲击波作用下岩石的破裂行为,开展了不同放电间距下的高压脉冲击穿红砂岩试验。利用超高速相机观测了红砂岩试件的裂纹扩展过程,讨论了放电间距对等离子冲击波作用下红砂岩试样表面裂纹密度的影响。随后,利用数值模拟软件LS-DYNA建立与实验条件一致的有限元模型,对比了模拟和实验结果,再现了试验过程。结果表明:等离子冲击波作用下,垂直放电通道方向的两个表面上的破坏主要是径向裂纹;平行放电通道的四个侧面则是横向裂纹占主导。随着放电间距的增大,试件表面的裂纹密度逐渐增大。依据数值模拟结果对试件内部的破裂过程及应力波的衰减进行了分析。结果表明:随着放电间距的增加,等离子冲击波在红砂岩试样内部形成的有效应力呈现出指数型衰减,在自由面附近有效应力峰值趋于稳定。

关键词：高压电脉冲放电间距裂纹扩展裂纹密度应力波