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Science China Chemistry 2008年第10期51卷 990-992页

作者： FENG ZeWang zhao xinqi BI Hua School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Huaxi Technology Co. Ltd.Beijing 102206China

Non-conjugated carboxylic acids are selectively esterified in good yields in the presence of conjugated or aromatic carboxylic acids by stirring over active carbon supported methanesulfonic acid in di-chloromethane at... 详细信息

关键词： esters esterification conjugation catalysis carboxylic acids

Effects of dairy bioactive peptides and lotus seeds/lily bulb powder on flavor and quality characteristics of goat milk yogurt

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Food Bioscience 2022年第3期47卷 442-449页

作者： xinqi zhao Ming Cheng Cunfang Wang Hua Jiang Xiaoning Zhang College of Food Science and Engineering Qilu University of Technology (Shandong Academy of Sciences)Jinan250353China Qingdao Research Institute of Husbandry and Veterinary Qingdao266100China

The objective of this study was to evaluate the changes on flavor and quality characteristics of goat yogurt during storage with the addition of dairy bioactive peptides and a mixture of lotus seed and lily bulb *** the addition of dairy bioactive peptides and lotus seeds/lily bulb powder resulted in a fermentation time reduction,water holding capacity(WHC)improvement,and inhibition of post-acidification of goat yogurt during storage.A total of 50 volatile flavor components were detected in the goat milk yogurt samples,and the addition of the above two supplements were shown to be effective in improving the flavor and the textural properties of the goat milk yogurt during *** group added with lotus seeds/lily bulb powder showed the best WHC and textural properties,followed by the group added with dairy bioactive peptides alone and the group with both *** addition of both supplements was found to be useful in making up for the two defects of goat yogurt,prolonged fermentation and soft ***,dairy bioactive peptides and lotus seeds/lily bulb powder are recommended to be added to goat yogurt as nutritional supplements.

关键词： Lotus seeds/lily bulb powder Dairy bioactive peptides Goat yogurt GC-IMS Texture properties

Improvement in the synthesis of 2-(5-amino-1,2,4-thiadiazol-3- yl)-2-(Z)-methoxyiminoacetic acid 2-benzothiazolyl thioester

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Frontiers of Chemical Science and Engineering 2008年第1期2卷 80-84页

作者： Shihao GAO Changquan GAO Chenghui SUN xinqi zhao School of Material Science and Technology Beijing Institute of TechnologyBeijing 100081China Pingdingshan No.55 Middle School Pingdingshan 467091China

2-(5-Amino-1,2,4-thiadiazol-3-yl)-2-(Z)-meth-oxyiminoacetic acid 2-benzothiazolyl thioester(III),an important intermediate of the fourth generation cephalos-porins,was efficiently synthesized by reacting 2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(Z)-methoxyiminoacetic acid(I)with 2,29-dibenzothiazole disulfide(II)in the presence of *** of reaction time,temperature,solvents,catalysts and feeding molar ratio on the yield and quality of products were investigated,and an im-proved procedure suitable for industrial production was *** 1,2-dichloroethane as solvent,triphe-nylphosphine as reducer,and triethylamine as catalyst,n(I):n(II):n(triphenylphosphine)51.0:1.0:1.0,the product was obtained at room temperature in 98.1%*** purity of the product without further purification is 98.7%determined by HPLC *** procedure could be a suitable alternative to the traditional processes because of its easy handling,high yield and low cost.

关键词： pharmaceutical engineering 2-(5-amino-1 2 4-thiadiazol-3-yl)-2-(Z)-methoxyiminoacetic acid 2-benzothiazolyl thioester cephalosporin thioesterification

Long cycle performance of NC@VN/MnO cathode for AZIBs based on Mn/V relay type collaboration

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Journal of Energy Chemistry 2023年第8期83卷 106-118,I0005页

作者： Tingting Li Ruisong Guo Yang Li Leichao Meng Xiaohong Sun Fuyun Li xinqi zhao Zhongkai Xu Jianhong Peng Lingyun An Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300072China College of Petrochemical Technology Lanzhou University of TechnologyLanzhou 730050GansuChina Qinghai Provincial Key Laboratory of Nanomaterials and Technology School of Physics and Electronic Information EngineeringQinghai Minzu UniversityXining 810007QinghaiChina

Aqueous zinc ion batteries(AZIBs) have received great attention because of their non-toxicity,high safety,low cost,high abundance,and high specific ***,their specific capacity is still low compared with lithium ion battery,and current academic research interesting has been focused on developing new cathode materials with high specific *** this study,a Mn/V hybrid polymer framework is designed by a simple self-polymerization *** subsequent calcination,ultrafine VN quantum dots and MnO nanoparticles are generated in situ and stably encapsulated inside N-doped carbon(NC) shells to obtain a novel hybrid cathode NC@VN/MnO for *** to the density functional theory(DFT) calculation,the hybrids of MnO and VN can generate both interfacial effects and built-in electric fields that significantly accelerate ion and electron transport by tuning the intrinsic electronic structure,thus enhancing electrochemical performance.A synergistic strategy of composition and structural design allows the rechargeable AZIBs to achieve low-cost and excellent long-cycle performance based on a relay type collaboration at different cycling ***,the NC@VN/MnO cathode has output a capacity of 108.3 mA h g^(-1)after 12,000 cycles at 10 A g^(-1).These results clearly and fully demonstrate the advantages of the hybrid cathode NC@VN/MnO.

关键词： VN quantum dots Mno N-doped carbon Heterojunction Long-cycle performance

Simultaneous realization of high sulfur utilization and lithium dendrite-free via dual-effect kinetic regulation strategy toward lithium-sulfur batteries

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Journal of Energy Chemistry 2023年第6期81卷 260-271,I0007页

作者： xinqi zhao Xiaohong Sun Ruisong Guo Song Wang Fuyun Li Tingting Li Wen Zhang Chunming Zheng Lingyun An Leichao Meng Xudong Hu Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300072China Qinghai Provincial Key Laboratory of Nanomaterials and Technology School of Physics and Electronic Information EngineeringQinghai Minzu UniversityXining 810007QinghaiChina Department of Chemistry&Biochemistry University of CaliforniaSanta BarbaraCA 93106United States

With the high theoretical specific capacity and energy density,lithium-sulfur batteries(LSBs)have been intensively studied as promising candidates for energy storage ***,LSBs are largely hindered by inferior sulfur utilization and uncontrollable dendritic ***,a hierarchical functionalization strategy of stepwise catalytic-adsorption-conversion for sulfur species via the synergetic of the efficiently catalytic host cathode and light multifunctional interlayer has been proposed to concurrently address the issues arising on the dual sides of the *** multi-layer SnS_(2) micro-flowers embedded into the natural three-dimensional(3D)interconnected carbonized bacterial cellulose(CBC)nanofibers are fabricated as the sulfur host that provides numerous catalytic sites for the rapid catalytic conversion of sulfur ***,the distinctive CBC-based SnO_(2)-SnS_(2) heterostructure network accompanied high conductive carbon nanofibers as the multifunctional interlayer promotes the rapid anchoringdiffusion-conversion of lithium polysulfides,Li^(+)flux redistribution,and uniform Li *** equipped with our strategy exhibit a high reversible capacity of 1361.5 m A h g^(-1)at 0.2 C and superior cycling stability with an ultra-low capacity fading of 0.031%per cycle in 1000 cycles at 1.5 C and 0.046%at 3 C.A favorable specific capacity of 859.5 m A h g^(-1)at 0.3 C is achieved with a high sulfur mass loading of 5.2 mg cm^(-2),highlighting the potential of practical *** rational design in this work can provide a feasible solution for high-performance LSBs and promote the development of advanced energy storage devices.

关键词： Lithium-sulfur battery Catalytic sulfur host Multifunctional interlayer Polysulfides adsorbing-conversion Dendrite-free

Jin Yong:A Role Model in Promoting Traditional Culture

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Jin Yong:A Role Model in Promoting Traditional Culture

罗伊氏乳杆菌葡萄糖基转移酶的生化特性及催化行为初探

北京论坛（2011）文明的和谐与共同繁荣--传统与现代、变革与转型

作者： xinqi zhao School of Economics,Peking University

This essay aims to discuss Jin Yong's role in promoting traditional *** author tends to look at this problem from three angles:history,value and literature.

关键词： Jin Yong,traditional culture,value

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食品与发酵工业 2021年第11期47卷 19-25页

作者：赵新崎缪铭食品科学与技术国家重点实验室(江南大学) 江苏无锡214122

葡萄糖基转移酶(glucosyltransferase,GTase)是一类可将α-1,4糖苷键转化为其他糖苷键的重要酶类,经其改性后得到的产物可作为一种新型的膳食纤维。该研究对来源于罗伊氏乳杆菌的葡萄糖基转移酶基因进行了异源表达,并对纯化后的GTase进... 详细信息

葡萄糖基转移酶(glucosyltransferase,GTase)是一类可将α-1,4糖苷键转化为其他糖苷键的重要酶类,经其改性后得到的产物可作为一种新型的膳食纤维。该研究对来源于罗伊氏乳杆菌的葡萄糖基转移酶基因进行了异源表达,并对纯化后的GTase进行酶学性质分析及功能研究。结果表明,GTase的分子质量为105 kDa,在pH 7.0~8.5之间很稳定,4℃下保存12 h,残余酶活力仍保持在80%以上。最适温度和最适pH分别为40℃和5.0,在此条件下加入Ca^(2+),可使酶活力提高约2.1倍。最适反应条件下,GTase对麦芽糊精(DE12)的K_(m)和V_(max)分别为(1.18±0.21)g/L和2.6μg/s。麦芽糊精(DE12)经GTase在40℃反应72 h,产物中α-1,6糖苷键的提高了38.4%,易消化淀粉的含量降低了25.96%,慢消化淀粉及抗消化淀粉的含量分别提高了8.97%和17.76%。

关键词：葡萄糖基转移酶淀粉修饰糖苷键催化活性消化性能

面向耦合分流动力构型的拖拉机犁耕工况控制策略

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农业工程学报 2022年第23期38卷 41-49页

作者：窦海石张幽彤艾强赵心琦北京理工大学机械与车辆学院北京100089

当前中国农田集群和能源短缺现状极大地促进了混合动力拖拉机的推广与使用,然而混动拖拉机动态变载荷工况加大了整机功率的耦合与分流难度。为此,该研究以发动机和双电机为动力源,利用图论原理设计出满足全功率范围作业需求的两种动力... 详细信息

当前中国农田集群和能源短缺现状极大地促进了混合动力拖拉机的推广与使用,然而混动拖拉机动态变载荷工况加大了整机功率的耦合与分流难度。为此,该研究以发动机和双电机为动力源,利用图论原理设计出满足全功率范围作业需求的两种动力系统耦合分流构型。此外,为实现整机的高能效目的,提出了基于马尔科夫决策的能量管理策略:首先根据拖拉机的载荷谱对整机作业环境进行辨识,采集犁耕作业环境下的拖拉机工作参数将需求功率抽象为马尔科夫决策中的状态转移过程;然后将整机能耗作为最优控制的成本函数,通过价值迭代函数求解最优控制律下电机2的工作区间。最后,采用硬件在环试验对提出的能量管理策略进行了有效性和可行性验证。试验结果表明,相比于传统基于规则的能量管理,提出的能量管理试验策略降低了7.2%的油耗。所设计的耦合分流构型拓展了拖拉机动力系统能量流的路径,直接耦合分流构型拟替代传统动力换挡的技术难点。能量管理策略在能效特性方面有一定优势,所提出的耦合分流动力构型为突破大马力拖拉机动力换挡的卡脖子技术提供了参考。

关键词：拖拉机试验能量管理策略控制策略耦合分流构型马尔科夫决策

红霉素A9-(1-异丙氧基环己基)肟的合成及其晶体结构

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有机化学 2003年第8期23卷 841-845页

作者：梁建华姚国伟赵信岐北京理工大学生命科学与技术学院北京100081 北京理工大学材料科学与工程学院北京100081

合成表征了红霉素A 9 ( 1 异丙氧基环己基 )肟的E和Z异构体 ,并在丙酮 -水混合溶剂中培养出了前者的单晶 .X射线衍射表明 ,其结构为正交晶系 ,P2 12 12 1空间群 ,晶胞参数 :a =2 .3 10 1( 5 )nm ,b =2 .3 761( 5 )nm ,c =0 .970 66( 19)... 详细信息

合成表征了红霉素A 9 ( 1 异丙氧基环己基 )肟的E和Z异构体 ,并在丙酮 -水混合溶剂中培养出了前者的单晶 .X射线衍射表明 ,其结构为正交晶系 ,P2 12 12 1空间群 ,晶胞参数 :a =2 .3 10 1( 5 )nm ,b =2 .3 761( 5 )nm ,c =0 .970 66( 19)nm ,V =5 .3 2 79( 18)nm3 ,Z =4,μ =0 .0 88mm-1,F( 0 0 0 ) =2 0 64 ,Dc=1.176g/cm3 .E 红霉素A 9 ( 1 异丙氧基环己基 )肟的晶体结构图明显表明 1 异丙氧基环己基保护基确实使十四元大环的构象发生了扭曲 ,使 6 OH的周围空间不再拥挤 ,从而导致 6 OH甲基化的选择性提高 .

关键词：红霉素 A9-(1-异丙氧基环己基)肟合成晶体结构异构体红霉素醚化克拉霉素

美国K-12“天才时刻”项目与学生创新素养培养

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比较教育学报 2024年第4期 77-89页

作者：李先军赵新琪华中师范大学教育学院武汉430079

为建设教育强国,拔尖创新人才受到社会各界高度重视,但我国对拔尖创新人才的关注主要集中在高等教育阶段,对基础教育阶段学生创新素养的关注不足。而美国K-12“天才时刻”项目的核心理念是通过创建探究式的学习活动,培养学生以创造性思... 详细信息

为建设教育强国,拔尖创新人才受到社会各界高度重视,但我国对拔尖创新人才的关注主要集中在高等教育阶段,对基础教育阶段学生创新素养的关注不足。而美国K-12“天才时刻”项目的核心理念是通过创建探究式的学习活动,培养学生以创造性思维为主的高阶思维技能。“天才时刻”项目的主要做法为:创设自由支持的环境;为学生提供个性化的学习指导;以及引导学生重视项目的反思与自我评价等。研究表明,“天才时刻”项目促进了中小学生创新素养的发展。为培养我国中小学生的创新素养,学校应创建有利于学生创新人格培养的学习氛围;为学生提供个性化的自由发展创新思维的机会;引导学生反思创新实践的过程与自我评价。

关键词：美国 “天才时刻”项目创新素养拔尖创新人才 K-12