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Walking Cations: Transition-Metal Free Benzyl Cation-Triggered sp^(2) C—H Phosphorylation and Etherification

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Chinese Journal of Chemistry 2022年第24期40卷 2933-2938页

作者： kuan liu Bin Song Qi Dang Long liu jie Tang Tianzeng Huang Chunya Li Zhi Tang Tieqiao Chen Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources Hainan Provincial Key Lab of Fine ChemHainan Provincial Fine Chemical Engineering Research CenterHainan UniversityHaikouHainan570228 China

A novel benzyl cation-triggered site-selective sp^(2) C—H phosphorylation and etherification was developed. This reaction was conducted under the transition metal-free conditions through cation migration via dearomatization. Under the reaction conditions, the derivatives of naphthalenes, benzofurans and benzo[b]thiophenes all can be transformed into the corresponding products in good to excellent yields. It provides a method to construct sp^(2) C—P and sp^(2) C—O bonds as well as a new strategy for benzylic activation-triggered sp^(2) C—H functionalization.

关键词： Transition metal-free Cation migration Site-selectivity Phosphorylation Etherification

Iodide analysis by ion chromatography on a new stationary phase of polystyrene-divinylbenzene agglomerated with polymerized-epichlorohydrin-dimethylamine

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Chinese Chemical Letters 2015年第8期26卷 1026-1030页

作者： mu-Hua Wang Zhong-Ping Huang Jun-Wei liu jie He Jia-jie Zhang Yan Zhu Department of Chemistry Lishui University Department of Chemistry Xixi Campus Zhejiang University College of Chemical Engineering Zhejiang University of Technology

A new stationary phase for iodide ion analysis has been developed. The cationic polymerepichlorohydrin-dimethylamine（PEPI-DMA） was served as modifier in synthesizing polyelectrolyte sorbents and the macroporous polystyrene-divinylbenzene（PS-DVB） resin was used as support. The positively charged polymer（PEPI-DMA） was electrostatically bonded to a negatively charged particle（PS-DVB sulfonated）. The new stationary phase was characterized by scanning electron microscopy（SEM）, Fourier transform infrared（FTIR）, elemental analysis, chemical adsorption and desorption measurements. The chromatographic evaluation of the new stationary phase was performed using various anions with a conductivity detector. The new stationary phase was also applied to the determination of iodide directly with a DC amperometric detector using a platinum working electrode and an Ag/Ag Cl reference electrode. The chromatographic conditions were optimized and the eluent solution contained 5 mmol/L HNO3 and 15 mmol/L Na NO3 at a flow rate of 1.0 m L/min and column temperature of 30 8C. The applied voltage of the DC amperometric detector was 0.9 V. Under the optimum conditions, the linear range of the method was 0.2–50 mg/L for iodide ion with a correlation coefficient of 0.9990. The detection limit was 0.05 mg/L（calculated at S/N = 3） and the relative standard deviations（RSD, n = 6） were all less than 1% for retention time, peak area and peak height. This method was also utilized for the determination of iodide ions in samples of povidone iodine solution and kelp samples with satisfactory results.

关键词： stationary polystyrene iodide retention satisfactory synthesizing cationic utilized contained iodine

Green-Light Electroluminescence of Conjugated Copolymer Containing p-Phenylene-ethynylene and Oxadiazole

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Chemical Research in Chinese Universities 2002年第1期18卷 65-69页

作者： yang mu-jie NIU Jun-feng HILLER Markus liu Xu YE Hui FAN Xi-zhi CHEN Jun Department of Polymer Science and Engineering Zhejiang UniversityHangzhou 310027P.R.China Department of Optical Engineering Zhejiang UniversityHangzhou 310027P.R.China

The title copolymer(PDEBO) was synthesized. The thermal characteristics of the polymer were determined by means of DSC and TGA, revealing that the polymer has a good thermal stability. The X-ray diffraction measurements of the thin films showed that the polymer is disorder. Electroluminescence(EL) in the green region of the spectrum with a maximum at 500 nm was observed from the polymer films sandwiched between indium-tin-oxide and an Al electrode.

关键词： Photoluminescence Electroluminescence Conjugated polymer Phenylene-ethynylene Oxadiazole

Pancreatic stent improves the success rate of needle-knife papillotomy in patients with difficult biliary cannulation

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World Journal of Gastroenterology 2025年第1期31卷 58-67页

作者： mu-Hsien Lee Cheng-Hui Lin Chi-Huan Wu Yung-kuan Tsou Kai-Feng Sung Sheng-Fu Wang Nai-Jen liu Department of Gastroenterology and Hepatology Chang Gung Memorial Hospital and Chang Gung University College of MedicineTaoyuan 33305Taiwan School of Medicine Chang Gung UniversityTaoyuan 33305Taiwan

BACKGROUND Needle-knife precut papillotomy(NKP)is typically performed ***,it remains unclear whether pancreatic stent(PS)placement can improve the outcomes of *** To explore whether PS placement improves the success rate of NKP in patients with difficult biliary *** This single-center retrospective study included 190 patients who underwent NKP between January 2017 and December 2021 after failed conventional biliary *** cases with incidental pancreatic duct cannulation during conventional biliary cannulation,the decision for pre-NKP PS placement was made at the endoscopist's *** primary outcome was the difference in the NKP success rate between patients with and without PS placement;the secondary outcome was the adverse event *** Among the 190 participants,82 received pre-NKP PS(PS-NKP group)whereas 108 did not[freehand or freehand NKP(FH-NKP)group].Post-NKP selective biliary cannulation was successful in 167(87.9%)patients,and the PS-NKP had a significantly higher success rate than the FH-NKP group(93.9%vs 83.3%,P=0.027).The overall adverse event rates were 7.3%and 11.1%in the PS-NKP and FH-NKP groups,respectively(P=0.493).A periampullary diverticulum(PAD)and significant intraoperative bleeding during NKP were independently associated with NKP failure;however,a pre-NKP PS was the only predictor of NKP *** the 44 participants with PADs,the PS-NKP group had a non-significantly higher NKP success rate than the FH-NKP group(87.5%and 65%,respectively;P=0.076).CONCLUSION PS significantly improved the success rate of NKP in patients with difficult biliary cannulation.

关键词： Difficult biliary cannulation Endoscopic retrograde cholangiopancreatography Needle-knife papillotomy Pancreatic stent Selective biliary cannulation

Mirids secrete a TOPLESS targeting protein to enhance JA-mediated defense and gossypol accumulation for antagonizing cotton bollworms on cotton plants

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Molecular Plant 2024年第11期17卷 1687-1701页

作者： Yu-Pei mu Dian-yang Chen Yu-jie liu Ming-Yu Zhu Xian Zhang Yin Tang Jia-Ling Lin mu-yang Wang Xiao-Xia Shangguan Xiao-Ya Chen Chengshu Wang Ying-Bo Mao CAS Key Laboratory of Insect Developmental and Evolutionary Biology CAS Center for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and EcologyUniversity of CASChinese Academy of SciencesShanghai 200032China National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and EcologyUniversity of CASChinese Academy of SciencesShanghai 200032China Institute of Cotton Research Shanxi Agricultural UniversityYuncheng 044000China

Most coexisting insect species exhibit stunted growth compared to individual species on *** phenomenon reflects an interspecific antagonism drawing extensive attention,while the underlying mechanisms remain largely ***(Apolygus lucorum)and cotton bollworms(Helicoverpa armigera)are two common cotton *** identified a secretory protein,ASP1,from the oral secretion of mirids,found in the nucleus of mirid-infested cotton ***1 specifically targets the transcriptional co-repressor TOPLESS(TPL)and inhibits NINJA-mediated recruitment of TPL,promoting plant defense response and gossypol accumulation in cotton ***1-enhanced defense inhibits the growth of cotton bollworms on cotton plants,while having limited impact on *** mesophyll-feeding characteristic allows mirids to avoid most cotton glands,invalidating cotton *** investigation reveals the molecular mechanism by which mirids employ cotton defense to selectively inhibit the feeding of cotton bollworms.

关键词： oral secretion plant defense co-repressor TOPLESS mirids Apolygus lucorum cotton bollworms Helicoverpa armigera

Assessment of land degradation in Inner Mongolia between 2000 and 2020 based on remote sensing data

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Geography and Sustainability 2023年第2期4卷 100-111页

作者： Linlin Zhao Kun Jia Xin liu jie Li mu Xia State Key Laboratory of Remote Sensing Science Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Beijing Engineering Research Center for Global Land Remote Sensing Products Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Geological Survey of Inner Mongolia HohhotInner Mongolia 010020China

Achieving land degradation neutrality(LDN)worldwide is a significant target of the Sustainable Development Goal(SDG15.3).Inner Mongolia,as a typical dryland region in northern China,has carried out several large-scale ecological restoration programs to combat land ***,there is a lack of comprehensive assess-ment of its land degradation situation after ecological programs implementation,which is of great significance to supporting SDG15.3 in *** study analyzed the land degradation situation using the improved SDG15.3.1 calculation framework based on fine resolution data in Inner Mongolia from 2000 to 2020,and finally compre-hensively evaluated the land status of the whole region and those subject to ecological *** results show that net land restoration proportion of various ecological project regions and whole region continues to *** scope of the Grain for Green Program(GGP)had the largest proportion of net land restoration while the Natural Reserve Program(NRP)had the lowest proportion from 2000 to *** net land restoration area of Inner Mongolia during 2000-2010 and 2010-2020 was 35,800 km 2 and 65,300 km 2,***,Inner Mongolia has achieved statistically zero growth in land degradation under the governance of ecological restora-tion ***,reasonable planning,well monitoring,and timely assessment of ecological restoration programs are crucial to support SDG15.3.

关键词： SDG15.3 Land degradation neutrality(LDN) Land degradation Ecological programs Inner Mongolia

Myosteatosis is associated with coronary artery calcification in patients with type 2 diabetes

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World Journal of Diabetes 2024年第3期15卷 429-439页

作者： Fu-Peng liu mu-jie Guo Qing yang Yan-Ying Li Yan-Gang Wang Mei Zhang The Affiliated Hospital of Medical College Qingdao University Qingdao UniversityQingdao 266071Shandong ProvinceChina Department of Endocrinology The Affiliated Hospital of Jining Medical UniversityJining 272029Shandong ProvinceChina Department of Medical Imaging The Affiliated Hospital of Jining Medical UniversityJining 272029Shandong ProvinceChina Department of Clinical Nutrition The Affiliated Hospital of Jining Medical UniversityJining 272029Shandong ProvinceChina Department of Endocrinology The Affiliated Hospital of Qingdao UniversityQingdao 266003Shandong ProvinceChina

BACKGROUND Myosteatosis,rather than low muscle mass,is the primary etiologic factor of sarcopenia in patients with type 2 diabetes mellitus(T2DM).Myosteatosis may lead to a series of metabolic dysfunctions,such as insulin resistance,systematic inflammation,and oxidative stress,and all these dysfunctions are closely associated with the acceleration of T2DM and *** To investigate the association between myosteatosis and coronary artery calcification(CAC)in patients with *** Patients with T2DM,who had not experienced major cardiovascular events and had undergone both abdominal and thoracic computed tomography(CT)scans,were *** mean skeletal muscle attenuation was assessed using abdominal CT images at the L3 *** CAC score was determined from thoracic CT images using the Agatston scoring *** was diagnosed according to Martin’s *** CAC(SCAC)was defined when the CAC score exceeded *** regression and decision tree analyses were *** A total of 652 patients with T2DM were *** them,167(25.6%)patients had *** regression analysis demonstrated that myosteatosis,age,duration of diabetes,cigarette smoking,and alcohol consumption were independent risk factors of *** was significantly associated with an increased risk of SCAC(OR=2.381,P=0.003).The association between myosteatosis and SCAC was significant in the younger patients(OR=2.672,95%CI:1.477-4.834,P=0.002),but not the older patients(OR=1.456,95%CI:0.863-2.455,P=0.188),and was more prominent in the population with lower risks of *** decision tree analyses prioritized older age as the primary variable for *** older patients,cigarette smoking was the main contributing factor for SCAC,while in younger patients,it was *** Myosteatosis is a novel risk factor for atherosclerosis in patients with T2DM,especially in the population with younger ages and fewer traditional ri

关键词： Type 2 diabetes Myosteatosis muscle quality Coronary artery calcification Atherosclerosis Cardiovascular diseases

Effects of Thickness and Anisotropic Strain on Polarization Switching Properties of Sub-10nm Epitaxial Hf_(0.5)Zr_(0.5)O_(2)Thin Films

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Chinese Physics Letters 2024年第11期41卷 221-232页

作者： kuan liu Kai liu Xingchang Zhang jie Fang Feng Jin Wenbin Wu Chao Ma Lingfei Wang Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China College of Materials Science and Engineering Hunan UniversityChangsha 410082China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

Doped HfO_(2)-based ferroelectric(FE)films are emerging as leading contenders for next-generation FE nonvolatile memories due to their excellent compatibility with complementary metal oxide semiconductor processes and robust ferroelectricity at nanoscale *** the considerable attention paid to the FE properties of HfO_(2)-based films in recent years,enhancing their polarization switching speed remains a critical research *** demonstrate the strong ferroelectricity of sub-10nm Hf_(0.5)Zr_(0.5)O_(2)(HZO)thin films and show that the polarization switching speed of these thin films can be significantly affected by HZO thickness and anisotropically strained La_(0.67)Sr_(0.33)MO_(3)-buffered *** observations indicate that the HZO thin film thickness and anisotropically strained La_(0.67)Sr_(0.33)MO_(3)layer influence the nucleation of reverse domains by altering the phase composition of the HZO thin film,thereby reducing the polarization switching *** the increase in HZO thickness and anisotropic compressive strain hinder the formation of the FE phase,they can enable faster *** findings suggest that FE HZO ultrathin films with polar orthorhombic structures have broad application prospects in microelectronic *** insights into novel methods for increasing polarization switching speed are poised to advance the development of high-performance FE devices.

关键词： ferroelectric anisotropic film

Production of human neurotrophin-3 in baculovirus expression system

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Chinese Science Bulletin 1998年第18期43卷 1562-1566页

作者： Yuanyue mu Hong liu jie Zhang Shuhong liu Yan Wu Jiazheng Wang Ming Fan Acad Mil Med Sci Inst Basic Med Sci Beijing 100850 Peoples R China

Human NT3 gene was inserted into pPAK9 and the resultant plasmid was used to cotransfect sf21 cells with Bsu36 Ⅰ digested Bac6 genomic DNA. Recombinant baculovirus was isolated by plaque assay. Slothybridization, immunocytochemistry and serumfree culture of DRG demonstrated that NT3 had been integrated into Bac6 DNA, expressed and secreted. The yield of purified hNT3 was 200 μg from 200 mL cultural supernatant after passing CM Sepharose Fast Flow column, the concentration for its maximum bioactivity was 4 ng/mL.

关键词： neurotrophin3 baculovirus expression.