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Nano Research 2023年第4期16卷 4751-4757页

作者： Lihong Lin Heng Li Hongfei Gu Zhiyi Sun Juan Huang zhenni qian Hang Li Juzhe Liu Hongyan Xi Pengfei Wu Qingqing Liu Shuhu Liu Lirong Zheng Zhuo Chen Zhengbo Chen Juanjuan Qi Energy&Catalysis Center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Department of Chemistry Capital Normal UniversityBeijing 100081China The Key Laboratory of Resources and Environmental System Optimization Ministry of Education(MOE)College of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing 102206China School of Chemistry Beihang UniversityBeijing 100191China Institute of High Energy Physics Chinese Academy of ScienceBeijing 100049China

Owing to the unique coordination environment and high atom utilization efficiency,single atom catalysts have been considered as an ideal artificial enzyme to mimic natural ***,single-atom Fe nanozyme anchored on N-doped Ti_(3)C_(2)Tx(Fe SA/N-Ti_(3)C_(2)Tx)with asymmetrically coordinated Fe-N_(1)C_(2)configuration is synthesized by vacancy capture and heteroatom doping strategy,which exhibits excellent peroxidase-like *** on the results of peroxidase catalytic kinetics and X-ray adsorption fine spectroscopy,the Fe-N_(1)C_(2)active sites in Fe SA/N-Ti_(3)C_(2)Tx are responsible for the excellent ***,the developed Fe SA/N-Ti_(3)C_(2)Tx can be employed to quantitative detection of melatonin(MT),which shows a wide linear detection range(0.01-100μM)and an excellent detection limit(7.3 nM)in buffer,0.01-100μM and 7.8 nM in serum *** work proves that MXene-based single atoms can be promising nanozyme in the field of bioassays.

关键词： iron single atom asymmetric coordination Ti_(3)C_(2)Tx MXene nanozyme melatonin detection

基于发展“模型认知”的化学概念进阶学习——以“氧化还原反应”单元教学为例

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化学教学 2023年第4期 44-51页

作者：钱珍妮上海市回民中学上海200065

以上科版“氧化还原反应”单元教学设计为例,依据对课程标准、教材和学情的分析,对学生围绕氧化还原反应这一核心概念在不同学段学习中所呈现的“概念理解水平”、“前科学概念与迷思概念”和“进阶目标”等状况的描述来规划学习进阶框... 详细信息

以上科版“氧化还原反应”单元教学设计为例,依据对课程标准、教材和学情的分析,对学生围绕氧化还原反应这一核心概念在不同学段学习中所呈现的“概念理解水平”、“前科学概念与迷思概念”和“进阶目标”等状况的描述来规划学习进阶框架,设计学习任务启发学生进行思考与探究,并建构高中阶段氧化还原反应的认知模型。

关键词：氧化还原反应学习进阶单元教学模型认知

过氧化氢诱导介孔CeO2的合成及对酸性橙7有机染料的吸附研究

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乐山师范学院学报 2020年第12期35卷 27-32页

作者：杨承伟何倩叶大伟钱珍妮翁郭蓥金芷如徐要辉乐山师范学院电子与材料工程学院四川乐山614000 乐山师范学院功能材料实验室四川乐山614000

以硝酸铈、碳酸铵、过氧化氢和水为原料,在不添加模板剂的条件下,运用温和的湿法化学法合成了介孔CeO2粉末。将碳酸铵加入到硝酸铈的水溶液中得到以Ce2(CO3)3·8H2O为主要物相结构的前驱体,再经过氧化氢的氧化,即可得到介孔结构的CeO2... 详细信息

以硝酸铈、碳酸铵、过氧化氢和水为原料,在不添加模板剂的条件下,运用温和的湿法化学法合成了介孔CeO2粉末。将碳酸铵加入到硝酸铈的水溶液中得到以Ce2(CO3)3·8H2O为主要物相结构的前驱体,再经过氧化氢的氧化,即可得到介孔结构的CeO2。考察了过氧化氢的浓度对样品物相结构和吸附性能的影响。当过氧化氢的浓度大于5 wt.%时,所得样品的物相均为立方萤石结构的CeO2。吸附实验结果表明,当过氧化氢的浓度为15 wt.%时所合成CeO2粉末对酸性橙7的吸附效果最好,在吸附反应为60 min时,基本达到吸附平衡,吸附效率接近100%。

关键词：二氧化铈介孔结构氧化剂吸附染料

Single molecule magnetic behavior and photo-enhanced proton conductivity in a series of photochromic complexes

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Chinese Chemical Letters 2022年第3期33卷 1417-1421页

作者： qian Zhang Jixiang Hu Qi Li Dongxue Feng zhenni Gao Guoming Wang College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China

Molecules with multifunctional properties are of immense interest in hybrid materials, while challenges still existed because of the limited compatibility of multiple functionalities in a single system. In this work, a series of metal-organic complexes were synthesized and characterized under the assembly of electron donor phosphonate, electron acceptor polypyridine ligand and spin carrier rare earth ions. All the compounds exhibited remarkable and reversible responses with photochromism and photomodulated fluorescence, originated from photogenerated radicals via electron transfer from phosphonates to polypyridine ligands. For the Dy analog, slow magnetic relaxation was observed at cryogenic temperature, indicating the single-molecule magnetic behavior. Furthermore, photogenerated radicals could enhance the proton conductive behavior, with about 2 times larger in magnitude after light irradiation for Dy and Y compounds. The introduction of photoluminescence, magnetism and proton conduction into metallic phosphonates can provide potential applications for photochromic materials.

关键词： Multifunctional Electron transfer Photochromism Single molecule magnetic behavior Proton conductivity

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医师值班排班系统的设计与实践

广州医药 2024年第5期55卷 567-571页

作者：陈珍妮李念李谦王垭邓悟叶枫刘敏四川大学华西医院医务部四川成都610041 四川大学华西天府医院医务部四川成都610213 四川大学华西医院护理部四川成都610041 四川大学华西天府医院运营管理部四川成都610213

值班和交接班制度是医疗质量安全管理核心制度之一,是医院“8 h”以外医疗质量安全连续性的重要保障。华西天府医院以往依托纸质排班进行医师值班工作管理,容易造成值班信息不透明、手工报送信息繁琐等弊端。利用值班排班系统对医师值... 详细信息

值班和交接班制度是医疗质量安全管理核心制度之一,是医院“8 h”以外医疗质量安全连续性的重要保障。华西天府医院以往依托纸质排班进行医师值班工作管理,容易造成值班信息不透明、手工报送信息繁琐等弊端。利用值班排班系统对医师值班工作进行科学管理,不仅使值班排班及值班费报送工作便捷、及时、规范,还有利于提升临床医师和行政管理人员的工作效率和满意度。

关键词：值班排班信息系统实践

Stereoconvergent and stepwise 1,3-dipolar cycloadditions of nitrile oxides and nitrile imines

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Chinese Chemical Letters 2022年第6期33卷 3012-3016页

作者： zhenni Zhao Zhi Ou Subarna Jyoti Kalita Feng Cheng qian Huang Yangyi Gu Yuhao Wang Yan Zhao Yiyong Huang Department of Chemistry School of ChemistryChemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China

The first example of stereoconvergent 1,3-dipolar cycloaddition of nitrile oxides and nitrile imines with E/Z isomeric mixture of electron-deficient olefins is reported,delivering isoxazolines and pyrazolines bearing two vicinal stereogenic tertiary and trifluoromethylated quaternary carbon centers with perfect regioand *** possibility of concerted cycloaddition/epimerization sequence under basic condition to form the thermodynamically stable diastereomers is excluded through some control experiments and DFT calculations,and a stepwise mechanism is proposed.

关键词： Stereoconvergent 1,3-Dipolar cycloaddition Isoxazoline Pyrazoline Trifluoromethyl

Let's Recall Those Who Work Closely with Death at Tomb Sweeping Day

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China Population Today 2014年第3期31卷 10-20页

作者： Li Yutong qian Yang Liu zhenni He Yongxia

At half past eight on the morning of March 28,in a basement near Yabao Road in Chaoyang District of Beijing,Chen,65 years old,was going to cook some congee with the cooker to eat with his *** landline phone rang suddenly.'Shifu,a kid was gone in the emergency *** come.''How old was the kid?''Only two days *** necrosis.''Alas,too bad.I'll be right there.'Chen walked out of the bedroom,unplugged the cooker,took down the white coat from the hanger and returned

关键词：清明节合作死亡朝阳区北京市地下室电磁炉

Unveiling the Challenges in Improving Data Availability in Vehicular Networks with Network Codingin

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ZTE Communications 2014年第1期12卷 26-32页

作者： zhenni Feng Yanmin Zhu qian Zhang Min Gao Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai Key Lab of Scalable Computing and Systems Department of Computer Science and Engineering Hong Kong University of Science and Technology HKUST Fok Ying Tung Graduate School

Retrieving data from mobile source vehicles is a crucial routine operation for a wide spectrum of vehicular network applications, in- cluding road surface monitoring and sharing. Network coding has been widely exploited and is an effective technique for diffusing in- formation over a network. The use of network coding to improve data availability in vehicular networks is explored in this paper. With random linear network codes, simple replication is avoided, and instead, a node forwards a coded block that is a random combination of all data received by the node. We use a network-coding-based approach to improve data availability in vehicular networks. To deter- mine the feasibility of this approach, we conducted an empirical study with extensive simulations based on two real vehicular GPS traces, both of which contain records from thousands of vehicles over more than a year. We observed that, despite significant improve- ment in data availability, there is a serious issue with linear correlation between the received codes. This reduces the data-retrieval success rate. By analyzing the real vehicular traces, we discovered that there is a strong community structure within a real vehicular network. We verify that such a structure contributes to the issue of linear dependence. Then, we point out opportunities to improve the network-coding-based approach by developing community-aware code-distribution techniques.

关键词： vehicular networks network coding data availability

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基于兴趣标签的缄默用户性别预测研究

华中科技大学学报（自然科学版） 2015年第12期43卷 101-105页

作者：钱铁云尤珍妮陈丽王飞武汉大学软件工程国家重点实验室湖北武汉430072

为解决社交媒体中缄默用户的性别预测问题,提出利用用户文件夹中的兴趣标签进行区分的方法.针对标签存在稀疏和歧义性的特点,设计了一种基于概念类推断用户性别的框架.首先依据社交心理特征将标签划分为若干概念类;其次通过关联挖掘方... 详细信息

为解决社交媒体中缄默用户的性别预测问题,提出利用用户文件夹中的兴趣标签进行区分的方法.针对标签存在稀疏和歧义性的特点,设计了一种基于概念类推断用户性别的框架.首先依据社交心理特征将标签划分为若干概念类;其次通过关联挖掘方法扩充概念类;最后通过概念类压缩用户特征空间.在新浪微博真实数据集上进行验证,实验结果表明:所提方法对于缄默用户性别有显著的区分效果,在不使用任何微博信息的条件下,区分准确率达到71%.

关键词：数据挖掘性别预测缄默用户兴趣标签概念类

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植酸酶发酵过程控制及其条件优化

中国食品学报 2016年第1期16卷 108-114页

作者：于平李倩徐真妮陈益润浙江工商大学食品与生物工程学院杭州310035

目的:通过5L小型发酵罐进行普通扩大培养与高密度培养的比较试验,研究芽孢杆菌发酵产植酸酶的过程及其优化产酶方式。方法:按7%的接种量将种子接种到5L发酵罐中,测定菌体生长密度、植酸酶的酶活、蛋白质量浓度、还原糖质量浓度、p H值... 详细信息

目的:通过5L小型发酵罐进行普通扩大培养与高密度培养的比较试验,研究芽孢杆菌发酵产植酸酶的过程及其优化产酶方式。方法:按7%的接种量将种子接种到5L发酵罐中,测定菌体生长密度、植酸酶的酶活、蛋白质量浓度、还原糖质量浓度、p H值和DO的变化情况并分析它们之间的关系。结果:当菌株发酵72 h,碳源即将耗尽时补入80 m L 3.7%的麸皮,酶活达到22551.8 U/m L,并最终确定了高密度培养为最佳发酵产酶方式。结论:本研究为中性耐热植酸酶的产业化生产提供了良好基础。

关键词：植酸酶普通扩大培养高密度培养中性耐热性