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Tuning the product selectivity of dimethyl oxalate hydrogenation over WO_(x) modified Cu/SiO_(2) catalysts

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Journal of Energy Chemistry 2024年第10期97卷 128-138,I0004页

作者： Zheng Li Zhuo Ma Yihui Li Ziang Zhao Yuan Tan Ziyin Liu Xingkun Chen Nian Lei Huigang wang Wei Lu Hejun Zhu Yunjie Ding Hangzhou institute of Advanced Studies Zhejiang Normal UniversityHangzhou 311231ZhejiangChina Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of chinese academy of sciences Beijing 100049China Shaanxi Key Laboratory of Clean Energy Technology Utilization Yulin BranchDalian National Laboratory For Clean EnergyCASYulin 719199ShaanxiChina State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Product selectivity and reaction pathway are highly dependent on surface structure of heterogeneous *** vapor-phase hydrogenation of dimethyl oxalate(DMO),"EG route"(DMO→methyl glycolate(MG)ethylene glycol(EG)→ethanol(ET))and"MA route"(DMO→MG→methyl acetate(MA))were proposed over traditional Cu based catalysts and Mo-based or Fe-based catalysts,***,tunable yield of ET(93.7%)and MA(72.1%)were obtained through different reaction routes over WO_(x) modified Cu/SiO_(2) catalysts,and the corresponding reaction route was further proved by kinetic study and in-situ DRIFTS *** studies demonstrated that H_(2) activation ability,acid density and Cu-WO_(x) interaction on the catalysts were tuned by regulating the surface W density,which resulted in the different reaction pathway and product ***'s more,high yield of MA produced from DMO hydrogenation was firstly reported with the H_(2) pressure as low as 0.5 MPa.

关键词： Ethanol Dimethyl oxalate Selective hydrogenation Methyl acetate WCu/SiO_(2)catalyst

Temperature-responsive chromatography using poly（N-isopropylacrylamide）-modified silica

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Temperature-responsive chromatography using poly（N-isopropy...

西藏雄村矿区Ⅲ号矿体硫、铅同位素特征及成矿物质来源

30th International Symposium on Capillary Chromatography、4.h GC×GC Symposium、16th National Symposium and Exhibition on Chromatography,i.e. 1st Dalian International Symposium and Exhibition on Chromatography

作者： Lei Chen Rongji Dai~* Wei Liu Xuejing Zhang Lin Yang Haihui wang yulin Deng School of Life Science and Technology beijing institute of Technology 100081 beijing China

＜正＞We synthesized temperature-responsive stationary phases modified with PNIPAAm in which temperature-responsive polymer was bound on silica gel *** was grafted onto（aminopropyl） silica using an activated esteramine coupling *** surface properties and functions of stationary phases were controlled by the external *** the chromatographic system,we separated benzene,toluene and dimethylbenzene using a sole aqueous mobile phase.

关键词： Temperature-responsive polymer HPLC,Poly(N-isopropylacrylamide) Temperature-responsive chromatography

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地质科技情报 2018年第4期37卷 1-9页

作者：郎兴海邓煜霖王旭辉唐菊兴崔志伟杨宗耀谢富伟娄渝明韩鹏尹青张忠张金树黄勇李志军成都理工大学地球科学学院成都610059 成都理工大学国土资源部构造成矿成藏重点实验室成都610059 中国地质科学院矿产资源研究所北京100037 西南交通大学地球科学与环境工程学院成都611756 西藏天圆矿业资源开发有限公司西藏日喀则857000 西藏大学工学院拉萨850012 中国地质调查局成都地质调查中心成都610081

雄村矿区位于拉萨地体南缘的冈底斯成矿带,通过对雄村矿区新发现的Ⅲ号矿体硫、铅同位素的综合分析研究,探讨了成矿物质来源问题。研究表明,矿石金属硫化物的δ34.在-1.3‰~1.4.之间,平均值为-0.85‰,分布范围较窄,成矿热液的δ34.ΣS... 详细信息

雄村矿区位于拉萨地体南缘的冈底斯成矿带,通过对雄村矿区新发现的Ⅲ号矿体硫、铅同位素的综合分析研究,探讨了成矿物质来源问题。研究表明,矿石金属硫化物的δ34.在-1.3‰~1.4.之间,平均值为-0.85‰,分布范围较窄,成矿热液的δ34.ΣS值为-0.04.,均显示出幔源硫的特征。矿石金属硫化物的铅同位素206Pb/204.b比值变化于18.204.18.4.8之间(平均值为18.359),207Pb/204.b比值变化于15.54.~15.593之间(平均值为15.567),208Pb/204.b比值变化于38.213~38.4.1之间(平均值为38.351),铅同位素组成特征值μ变化于9.37~9.4.之间(平均值为9.4.);在铅同位素判别图解上位于造山带铅同位素演化线附近,显示出地幔物质与俯冲沉积物的混合特征,暗示金属硫化物中的铅源自地幔,并有少量俯冲沉积物的加入。

关键词：冈底斯雄村硫同位素铅同位素成矿物质来源

Mitochondria determine the sequential propagation of the calcium macrodomains revealed by the super-resolution calcium lantern imaging

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Science China(Life sciences) 2020年第10期63卷 1543-1551页

作者： yulin Zhang Jianyong wang Shijia Xing Liuju Li Shiqun Zhao Wenzhen Zhu Kuo Liang Yanmei Liu Liangyi Chen State Key Laboratory of Membrane Biology Beijing Key Laboratory of Cardiometabolic Molecular MedicineInstitute of Molecular MedicinePeking UniversityBeijing 100871China PKU-IDG/McGovern institute for Brain Research Beijing 100871China Department of General Surgery Xuanwu HospitalCapital Medical UniversityBeijing 100053China institute for Brain Research and Rehabilitation(IBRR) Guangdong Key Laboratory of Mental Health and Cognitive ScienceSouth China Normal UniversityGuangzhou 200062China

Despite the wide application of super-resolution(SR)microscopy in biological studies of cells,the technology is rarely used to monitor functional changes in live *** combining fast spinning disc-confocal structured illumination microscopy(SD-SIM)with loading of cytosolic fluorescent Ca2+indicators,we have developed an SR method for visualization of regional Ca2+dynamics and related cellular organelle morphology and dynamics,termed SR calcium lantern *** COS-7 cells stimulated with ATP,we have identified various calcium macrodomains characterized by different types of Ca2+release from endoplasmic reticulum(ER)***,we demonstrated various roles of mitochondria in mediating calcium signals from different sources;while mitochondria can globally potentiate the Ca2+entry associated with store release,mitochondria also locally control Ca2+release from the neighboring ER stores and assist in their refilling processes.

关键词： super-resolution imaging ER Ca2+release mitochondrial sequential response

Peak compression technique in high-performance liquid chromatography

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chinese Science Bulletin 2009年第16期54卷 2805-2809页

作者： WEI YuXia wang Lin XIAO ShengYuan QING Hong ZHU Yong HU GaoFei DENG yulin School of Life Science and Technology Beijing Institute of Technology Beijing 100081 China

Peak compression technique based on the difference of the solute migration velocity in two different mobile phases was described theoretically and confirmed using benzaldehyde and 4.hydroxyquinoline (4.HQ) as model compounds. After peak compression, the peak compression factors (the ratio of peak width at half-height under non-compression and that under compression condition) of benzaldehyde and 4.HQ were 0.19 and 0.13, respectively. By this application of the peak compression technique to the mixture, both enhanced peak height and good separation were obtained in one run cycle. This peak compression technique was introduced to determine benzaldehyde from semicarbazide-sensitive amine oxidase-catalyzed enzymetic reaction in order to illustrate the applicability of this technique to the real sample. As a result, the peak was compressed effectively, and 4.94.fold, 19.3-fold and 5.74.fold enhancement in peak height, plate number and signal to noise ratio were also achieved, respectively.

关键词：压缩技术高效液相色谱模型化合物脲甲醛迁移速度羟基喹啉压缩条件运行周期

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我国设施园艺病虫害发生特点与绿色防控策略

中国生物防治学报 2024年第5期40卷 1169-1180页

作者：吴圣勇张梦迪徐进王恩东崔丽雷仲仁史晓斌谢学文王少丽王甦魏书军马中正何莉梅高玉林中国农业科学院植物保护研究所/植物病虫害生物学国家重点实验室北京100193 湖南省农业科学院植物保护研究所长沙410125 中国农业科学院蔬菜花卉研究所北京100081 北京市农林科学院植物保护环境保护研究所北京100097 中国农业科学院都市农业研究所成都610218

我国设施园艺发展迅速,对促进农业现代化、乡村振兴和都市农业发展具有重要作用。本文结合我国设施园艺产业的发展现状,总结设施环境下病虫害发生特点,并从农业防治、物理防治、生物防治、生态调控、生物技术和科学用药等方面概述了病... 详细信息

我国设施园艺发展迅速,对促进农业现代化、乡村振兴和都市农业发展具有重要作用。本文结合我国设施园艺产业的发展现状,总结设施环境下病虫害发生特点,并从农业防治、物理防治、生物防治、生态调控、生物技术和科学用药等方面概述了病虫害防治技术,最后对设施园艺病虫害防治提出建议,以期为我国设施园艺的健康可持续发展提供参考。

关键词：园艺产业保护地栽培病虫害绿色防控

Carbon inputs regulate the temperature sensitivity of soil respiration in temperate forests

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Journal of Arid Land 2022年第9期14卷 1055-1068页

作者： LIU yulin LI Jiwei HAI Xuying WU Jianzhao DONG Lingbo PAN Yingjie SHANGGUAN Zhouping wang Kaibo DENG Lei State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationChinese Academy of Sciences and Ministry of Water ResourcesYangling 712100China University of chinese academy of sciences Beijing 100049China institute of Soil and Water Conservation Northwest Agriculture and Forestry UniversityYangling 712100China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710075China

Litter and root activities may alter the temperature sensitivity(Q_(10))of soil ***,existing studies have not provided a comprehensive understanding of the effects of litter and root carbon inputs on the Q_(10)of soil respiration in different *** this study,we used the trench method under in situ conditions to measure the total soil respiration(R_(total)),litter-removed soil respiration(R_(no-litter)),root-removed soil respiration(R_(no-root)),and the decomposition of soil organic matter(i.e.,both litter and root removal;R_(SOM))in different seasons of pioneer(Populus davidiana Dode)and climax(Quercus liaotungensis Mary)forests on the Loess Plateau,*** temperature,soil moisture,litter biomass,fine root biomass,litter carbon,and root carbon were analyzed to obtain the drive mechanism of the Q_(10)of soil respiration in the two *** results showed that the Q_(10)of soil respiration exhibited seasonality,and the Q_(10)of soil respiration was higher in *** litter enhanced the Q_(10)of soil respiration considerably more than the root *** temperature,soil moisture,fine root biomass,and litter carbon were the main factors used to predict the Q_(10)of different soil respiration *** findings indicated that factors affecting the Q_(10)of soil respiration highly depended on soil temperature and soil moisture as well as related litter and root traits in the two forests,which can improve our understanding of soil carbon–climate feedback in global *** results of this study can provide reference for exploring soil respiration under temperate forest restoration.

关键词： litter biomass root carbon soil respiration temperate forests Loess Plateau

Preparation and evaluation of an enzymatic microreactor based on HILIC matrix for digestion and identification of proteins

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chinese Science Bulletin 2010年第10期55卷 910-914页

作者： wang ShanShan LI Qin LU XueFei LIU Tong ZHANG WeiBo GENG LiNa DENG yulin School of Life Science and Technology Beijing Institute of Technology Beijing 100081 China Analysis and Test Center Shandong Academy of Sciences Jinan 250014 China

In the present study,a new enzymatic microreactor is developed by immobilizing trypsin on the matrix-HILIC (hydrophilic interaction chromatography).The influences of different types of buffer solutions (borate,Tris·HCl,and phosphate),their concentrations and pH values on the immobilizing rate and the activity of immobilized trypsin were *** optimal condition for off-line immobilization of trypsin on matix-HILIC was Tris·HCl buffer (20 mmol/L,pH 8.0),and then,under the optimal condition,an enzymatic microreactor was prepared by trypsin dynamically immobilized on HILIC matrix which was packed in a Peeksil *** can be found that the microreactor possessed high hydrolytic activity according to the hydrolysis results of N-α-benzoyl-DL-arginine P-nitroanilide (BAPNA),a substrate of ***,bovine serum albumin (BSA),cytochrome C and myoglobin as standard proteins were chosen to characterize the enzymolysis of the microreactor demonstrating the high enzymolysis efficiency by this enzymatic ***,the deactivated trypsin can be easily eluted from the matrix-HILIC to re-immobilize trysin,which is highly cost-effective in the *** the results show that the new enzymatic microreactor associated with HPLC-MS techniques can realize online enzymolysis of proteins,and the time to analyze and identify the proteins is greatly shortened.

关键词：酶催化反应动态矩阵蛋白质评价鉴定胰蛋白酶活性酶固定化消化制备

Sliding Mode Control tor Satellite Formation Keeping Against J2 Perturbation

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Sliding Mode Control tor Satellite Formation Keeping Against...