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Food Science and Human wellness 2022年第4期11卷 922-932页

作者： Hao Lai Fuchao Zhan Yujie wei Abel w.S.Zongo Sha Jiang haomin Sui Bin Li Jing Li College of Food Science and Technology Huazhong Agricultural UniversityWuhan 430070China Key Laboratory of Environment Correlative Dietology(Huazhong Agricultural University) Ministry of EducationWuhan 430070China

The influence of particle size and ionic strength on the freeze-thaw(FT) stability of emulsions stabilized by whey protein isolate(wPI) was investigated in this study. The destabilization of emulsions during the FT process could be suppressed in a way by decreasing the particle size of the initial emulsions, which was the result of retarding the coalescence between oil droplets. To further improve the FT stability of emulsions, different amounts of Na Cl were added before emulsification. The emulsions with the ionic strength at 30–50 mmol/L exhibited good FT stability. Notably, the ionic strength in this range would not lower the freezing point of emulsions below the freezing temperature used in this study. Salt addition could improve the structural properties of proteins, which was available to strengthen the rigidity and thickness of interfacial layers, sequentially building up the resistance that the destruction of ice crystals to emulsions. Moreover, stronger flocculation between emulsion droplets could promote the formation of a gel-like network structure dominated by elasticity in the emulsion system, which might effectively inhibit the movement of droplets, and improve the FT stability of emulsions eventually. The result was of great significance for the preparation of emulsion-based foods with improved FT stability.

关键词： Emulsion Freeze-thaw stability whey protein isolate Particle size Ionic strength

Intrinsic excitonic emission and valley Zeeman splitting in epitaxial MS2(M=Mo and w)monolayers on hexagonal boron nitride

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Nano Research 2018年第12期11卷 6227-6236页

作者： Chunxiao Cong Chenji Zou Bingchen Cao Lishu wu Jingzhi Shahg haomin w.ng Zhijun Qiu Laigui Hu Pengfei Tian Ran Liu Ting Yu State Key Laboratory of ASIC and System School of Information Science and TechnologyFudan UniversityShanghai 200433China Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences865Changning RoadShanghai200050China

Two-dimensional (2D) semiconductors, represented by 2D transition metal dichalcogenides (TMDs), exhibit rich valley physics due to strong spin-orbit/spin-valley coupling. The most common way to probe such 2D systems is to utilize optical methods, which can monitor light emissions from various excitonic states and further help in understanding the physics behind such phenomena. Therefore, 2D TMDs with good optical quality are in great demand. Here, we report a method to directly grow epitaxial wS2 and MoS2 monolayers on hexagonal boron nitride (hBN) flakes with a high yield and high optical quality; these monolayers show better intrinsic light emission features than exfoliated monolayers from natural crystals. For the first time, the valley Zeeman splitting of wS2 and MoS2 monolayers on hBN has been visualized and systematically investigated. This study paves a new way to produce high optical quality wS2 and MoS2 monolayers and to exploit their intrinsic properties in a multitude of applications.

关键词： transition metal dichalcogenides intrinsic excitonic emission valley Zeeman splitting hexagonal boron nitride chemical vapor deposition

Catalytically active atomically thin cuprate with periodic Cu single sites

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National Science Review 2023年第1期10卷 226-235页

作者： Huimin Yang Shibo Xi Na Guo Mu w.ng Lingmei Liu Pin Lyu Xiaolong Yu Jing Li haomin Xu Xiao Hai Zejun Li Xinzhe Li Tao Sun Xiaoxu Zhao Yu Han wei Yu Jie wu Chun Zhang Honghan Fei Ming Joo Koh Jiong Lu Department of Chemistry National University of Singapore Institute of Chemical and Engineering Sciences Department of Physics National University of Singapore Advanced Membranes and Porous Materials Center King Abdullah University of Science and Technology SDU-ANU Joint Science College Shandong University School of Materials Science and Engineering Peking University Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore Department of Chemistry Tongji University

Rational design and synthesis of catalytically active two-dimensional(2D) materials with an abundance of atomically precise active sites in their basal planes remains a great ***,we report a ligand exchange strategy to exfoliate bulk [Cu4(OH)6] [O3S(CH2)4SO3] cuprate crystals into atomically thin 2D cuprate layers([Cu2(OH)3]+).The basal plane of 2D cuprate layers contains periodic arrays of accessible unsaturated Cu(Ⅱ) single sites(2D-CuSSs),which are found to promote efficient oxidative Chan-Lam *** me chanistic studies reveal that the reactions proceed via coordinatively unsaturated CuO4(Ⅰ) single sites with the formation of Cu(Ⅰ) species in the rate-limiting step,as corroborated by both operando experimental and theoretical *** robust stability of 2D-CuSSs in both batch and continuous flow reactions,coupled with their recyclability and good performance in complex molecule derivatization,render 2D-CuSSs attractive catalyst candidates for broad utility in fine chemical synthesis.

关键词： exfoliation nanosheet heterogeneous catalysis

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快速筛查革兰阴性杆菌β内酰胺酶

中国感染与化疗杂志 2012年第4期12卷 302-305页

作者：汪雅萍杨俊应春妹杜坤张灏旻郑冰上海交通大学医学院附属仁济医院检验科上海200127

目的应用Cica-Beta-Test试剂盒快速筛查革兰阴性杆菌β内酰胺酶:超广谱β内酰胺酶(ESBILs)、金属β内酰胺酶(MBLs)和染色体介导头孢菌素酶(AmpC酶),为临床抗感染治疗提供耐药依据。方法收集2010年1月至2011年3月上海交通大学医学院附属... 详细信息

目的应用Cica-Beta-Test试剂盒快速筛查革兰阴性杆菌β内酰胺酶:超广谱β内酰胺酶(ESBILs)、金属β内酰胺酶(MBLs)和染色体介导头孢菌素酶(AmpC酶),为临床抗感染治疗提供耐药依据。方法收集2010年1月至2011年3月上海交通大学医学院附属仁济医院临床分离革兰阴性杆菌共110株,其中头孢噻肟和(或)头孢他啶不敏感大肠埃希菌、肺炎克雷伯菌和奇异变形杆菌各20株,多重耐药鲍曼不动杆菌20株和阴沟肠杆菌30株。其中大肠埃希菌、肺炎克雷伯菌和奇异变形杆菌用美国CLSI推荐方法确证产ESBLs;对鲍曼不动杆菌用聚合酶链反应(PCR)法检测其MBLs和AmpC酶耐药基因;对阴沟肠杆菌用表型筛选法(三维试验法)检测其AmpC酶;对所有菌株应用Cica-Beta-Test试剂盒快速筛查ESBLs、MBLs和AmpC酶。根据检测结果对试剂盒进行评估。结果应用Cica-Beta-Test试剂盒检测110株临床分离菌未发现假阳性,确诊试验总符合率为92.0%(92/100),其中与PCR法比较检测MBLs和AmpC酶结果符合率为100%;与CLSI推荐ESBLs双纸片确诊试验比较,符合率为86.7%(52/60)。30株阴沟肠杆菌用AmpC酶表型筛选法比较符合率为86.7%(26/30)。结论 Cica-Beta-Test试剂盒可对各种革兰阴性杆菌产生的β内酰胺酶进行筛查及初步分型,简便、快速,灵敏度高,准确率高,尤其能对CLSI未推荐方法的耐药革兰阴性杆菌进行β内酰胺酶快速筛查意义更大。

关键词：快速筛查革兰阴性杆菌 β内酰胺酶 HMRZ-86

CVD growth of perovskite/graphene films for high-performance flexible image sensor

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Science Bulletin 2020年第5期65卷 343-349页

作者： Kailun Xia wenqiang wu Mengjia Zhu Xinyi Shen Zhe Yin haomin w.ng Shuo Li Mingchao Zhang Huimin w.ng Haojie Lu Anlian Pan Caofeng Pan Yingying Zhang Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China Key Laboratory for Micro-Nano Physics and Technology of Hunan Province State Key Laboratory of Chemo/Biosensing and Chemometrics and College of Materials Science and EngineeringHunan UniversityChangsha 410082China Cavendish Laboratory University of CambridgeCambridge CB30HEUK

Hybrid perovskite possesses excellent photoelectric properties,including large light-absorption capacity and high carrier mobility,and is an ideal light-absorbing material for photoelectric *** grain size and compactness of hybrid perovskite are key factors affecting the performance of photoelectric *** photocurrent and photoresponsivity of these devices are relatively low because of the rapidly recombined photoexcited electron-hole pairs in hybrid ***,we develop a facile two-step chemical vapor deposition(CVD)method to synthesize a high-quality van der waals(vd ws)MAPb I3/graphene heterostructure for high-performance image *** introduced inorganic sources(PbI2)to vd ws epitaxially grown Pb I2 film on a seamless graphene monolayer film template through *** iodide(MAI)was then reintroduced to prepare the vd ws MAPb I3/graphene *** MAPb I3 layer is composed of densely packed,large-size grains and displays a smooth *** photoresponsivity of 107A/w is achieved in the corresponding *** by the human visual system,we designed a flexible photodetector array containing(24?24)pixels,achieving perfect image recognition and color *** study may greatly facilitate the construction of high-performance optoelectronic devices in artificial retina,biomedical imaging,remote sensing,and optical communication.

关键词： Hybrid perovskite Chemical vapor deposition Graphene template Flexible photodetector array Artificial retina

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水平轴风力机桨叶计算模态分析

太阳能学报 2002年第3期23卷 361-365页

作者：马昊旻叶枝全包能胜曹人靖汕头大学能源研究所汕头515063

用有限元分析的方法对水平轴风力机的桨叶进行了计算模态分析和研究。通过对 30 0w桨叶的模态计算分析结果与实验模态结果加以对比和验证 ,得到了在低阶条件下合理的桨叶模态计算模型 ,探讨了以有限元为基础的计算模态分析在选择不同的... 详细信息

用有限元分析的方法对水平轴风力机的桨叶进行了计算模态分析和研究。通过对 30 0w桨叶的模态计算分析结果与实验模态结果加以对比和验证 ,得到了在低阶条件下合理的桨叶模态计算模型 ,探讨了以有限元为基础的计算模态分析在选择不同的计算模型时对计算结果的影响 ,最后对 6 0 0kw桨叶进行了模态计算 ,其结果与采用“Bladedforwindows”软件的计算结果作了比较 ,得到了满意的一致结果。

关键词：风力机浆叶模态分析有限元分析

数智赋能文化遗产保护与传承研究——以中国茶文化非遗的国际传播为例

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农业图书情报学报 2024年第6期36卷 62-78页

作者：陈巧妃周昊旻许鑫华东师范大学经济与管理学院上海200062

[目的/意义]在全球化和数字化进程中,文化遗产的保护与传承面临新的机遇与挑战。如何有效推进文化遗产的保护与传承,提升中华文化的国际影响力是建设文化强国过程中需要思考的问题。[方法/过程]本研究以YouTube平台上的中国茶文化视频... 详细信息

[目的/意义]在全球化和数字化进程中,文化遗产的保护与传承面临新的机遇与挑战。如何有效推进文化遗产的保护与传承,提升中华文化的国际影响力是建设文化强国过程中需要思考的问题。[方法/过程]本研究以YouTube平台上的中国茶文化视频为研究对象,构建“认知-情感-行为”理论框架,通过对视频评论的主题聚类分析用户的认知特征,进一步探讨用户的情感反应,并构建国际传播力测量模型,以分析认知、情感与行为之间的相互作用机制。研究过程中,还分析了传播主体和传播内容对茶文化国际传播效果的影响。[结果/结论]茶具与茶宠的视频主题、4~20分钟的适中视频时长以及传播主体的可信度和影响力显著提升了茶文化视频的国际传播效果。而背景音乐、用户对茶艺的认知赞同度则对传播效果产生负向影响。基于以上结论,本研究进一步提出了数智赋能文化遗产保护与传承的相关建议。

关键词：非遗文化遗产数智赋能国际传播文化强国

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西部高校新能源材料专业实践教学模式的研究与实践

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实验技术与管理 2014年第7期31卷 172-175页

作者：南辉林红王刚陈慧媛杨桂军韦浩民青海大学机械工程学院青海西宁810016 清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室北京100084

随着西部经济的发展和高等教育改革的不断深入,西部地区综合型大学新能源材料专业教育也进入一个全新的发展时期。通过探讨该专业实践教学理念、教学体系与内容的建设、实践教学方法与手段的改革,旨在能更好地培养学生的工程实践能力、... 详细信息

随着西部经济的发展和高等教育改革的不断深入,西部地区综合型大学新能源材料专业教育也进入一个全新的发展时期。通过探讨该专业实践教学理念、教学体系与内容的建设、实践教学方法与手段的改革,旨在能更好地培养学生的工程实践能力、创新意识和团队合作精神。

关键词：新能源材料实践教学教学体系

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高层住宅太阳能热水系统性能测试及分析

区域供热 2021年第3期 92-97页

作者：罗昊敏张杰穆永超张洁雄河北工程大学

以研究高层住宅建筑太阳能热水系统为目的,对天津市某单元楼太阳能热水系统进行现场测试,通过对比两种工况测试数据,分析了太阳能热水系统的运行性能。研究结果表明,两种工况下板式换热器平均传热系数分别为2828.54 w/(m^(2)·K)、2919.... 详细信息

以研究高层住宅建筑太阳能热水系统为目的,对天津市某单元楼太阳能热水系统进行现场测试,通过对比两种工况测试数据,分析了太阳能热水系统的运行性能。研究结果表明,两种工况下板式换热器平均传热系数分别为2828.54 w/(m^(2)·K)、2919.05 w/(m^(2)·K),且换热器出口侧温差较小,换热存在不合理现象;工况一两个并联管路的平均流量分别为1.54 m^(3)/h、3.76 m^(3)/h,管路不平衡率为0.59;工况一、二(工况一、二分别代表系统在晴天、多云两种典型天气条件下的系统运行状态)室外环境温度分别为25.44℃、28.01℃,集热器平均集热效率分别为27.25%、30.33%,集热器集热效率受室外温度因素影响较大。

关键词：太阳能热水系统传热系数不平衡率集热效率

wC-Cr_(7)C_(3)复合增强铁基激光熔覆层的组织与性能

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机械工程材料 2022年第10期46卷 98-105页

作者：王皓民汪国庆熊杨凯江昊赵远涛方志强李文戈海南大学材料科学与工程学院海口570228 上海海事大学商船学院上海201306

以铬粉、钨粉、石墨粉和铁粉为熔覆层原料,Ni60合金粉为黏结层原料,采用激光熔覆技术在45钢基体表面制备了wC-Cr_(7)C_(3)复合增强铁基熔覆层,研究了不同激光功率(2 500~3 500 w)和扫描速度(2~5mm·s^(-1))下熔覆层的宏观形貌,得到最优... 详细信息

以铬粉、钨粉、石墨粉和铁粉为熔覆层原料,Ni60合金粉为黏结层原料,采用激光熔覆技术在45钢基体表面制备了wC-Cr_(7)C_(3)复合增强铁基熔覆层,研究了不同激光功率(2 500~3 500 w)和扫描速度(2~5mm·s^(-1))下熔覆层的宏观形貌,得到最优工艺参数,分析最优工艺下熔覆层的显微组织和性能。结果表明:最优激光熔覆工艺参数为激光功率3 500 w和扫描速度2mm·s^(-1);熔覆层中原位自生了网络结构的wC-Cr_(7)C_(3)复合碳化物,由熔覆层表面到内部其组织逐渐由等轴晶和树枝晶向柱状晶和平面晶转变;熔覆层的平均硬度为507.6 HV,较基体提高约63.8%,平均稳定摩擦因数为0.128,仅为基体的1/4,磨损率为4.9×10^(5)cm^(3)·N^(-1)·m^(-1),仅为基体的1/9,磨损形式为轻微的磨粒磨损和轻微的黏着磨损。

关键词： wC-Cr_(7)C_(3)复合增强铁基激光熔覆层原位反应显微组织摩擦磨损性能