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Dehydrochlorination of Poly vinyl chloride Catalyzed by Quarternary Ammonium Salts in Solid Phase

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Chemical Research in Chinese Universities 1992年第1期8卷 53-58页

作者： Fu Yujie, Xie Demin, Wang Rongshun, Wang Cunguo and Zhang Xiyan (department of chemistry, northeast normal university, changchun)Wang Qiang (Centre of Analysis and Measurement, northeast normal university, changchun)

The development of conducting polymers has been an active subject in the world since the late in 1970’s. The preparation of polyaeetylene-like polymers by dehydroehlorination of polyvinylchloride (PVC) is a very economical and useful procedure and,hence, a focus of enormous interest of both theoretieians and experimentalists. In recent years, many methods for dehydrochlorination of PVC in solution have been studied widely and many kinds of catalytic mechanisms have been suggested.

关键词： Poly (vinylchloride) Quarternary ammonium salt Dehydrochlorination

ADVANCES IN STUDY OF A NEW CLASS OF PILLARED LAYERED MICROPOROUS MATERIALS──POLYOXOMETALATE-TYPE HYDROTALCITE-LIKE CATALYSTS

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Journal of Energy chemistry 1997年第2期 155-168页

作者： XU Lin HU Chang-Wen WANG En-Bo (department of chemistry, northeast normal university changchun, Jilin 130024)

In the present paper, on the basis of our work. advances in study of the catalysts of polyacid-type hydrotalcite-like are reported and *** polyoxometalates (POM) as pillaring species and layered double hydroxides (LDH) as host matter, a new class of catalytic materials, LDHPOM, has been synthesized by five different methods. Their acidic and oxidative catalytic properties have been investigated by several research groups. The above mentioned information is given in this review.

关键词： polyoxometalate pillared layered microporous material structure synthesis catalysis

Protective and Adverse Roles of DDX3X in Different Cell Types in Nonalcoholic Steatohepatitis Progression

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Research 2024年第3期6卷 561-574页

作者： Suzhen Yang Lin Zhou Tianming zhao Hanlong Zhu Tingting Luo Kang Jiang Xiaoxiao shi Chunyan Chen Han Zhang Si zhao Xiaoping Zou Yuzheng Zhuge Fangyu Wang Lei Wang Mingzuo Jiang Bing Xu department of Gastroenterology the Affiliated Drum Tower Hospital of Nanjing University Medical SchoolJiangsuNanjing210002China. department of Gastroenterology and Hepatology the Affiliated Jinling Hospital of Nanjing University Medical SchoolJiangsuNanjing210002China School of Medicine Northwest UniversityShaanxiXi’an710069China. department of Gastroenterology Nanjing Drum Tower HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeJiangsuNanjing210008China.

Persistent hepatic cellular metabolic stress and liver inflammatory stimuli are key signatures of nonalcoholic steatohepatitis(NASH).DDX3X is a vital molecule involved in cell fate decisions in both pro-survival stress granule(SG)and pro-death NOD-like receptor family pyrin domain containing 3(NLRP3)inflammasome assembly in response to stress ***,the role of DDX3X in NASH remains *** characterized the cell type-specific roles of DDX3X in *** liver tissues from NASH patients and normal control subjects were collected to assess DDX3X expression and *** steatohepatitis models were constructed by feeding macrophage-specific DDX3X knockout(DDX3^(XΔMφ)),hepatocyte-specific DDX3X knockout(DDX3X^(Δhep)),and wild-type control(DDX3X^(fl/fl))mice a high-fat and high-cholesterol(HFHC)diet,a methionine-and choline-deficient(MCD)diet,and a high-fat/high-iron/high-fructose/high-cholesterol,low-methionine,and choline-deficient(HFHIHFHC-MCD)*** study demonstrated that DDX3X was predominantly expressed in macrophages and hepatocytes in control liver tissues,and its expression was down-regulated in patients or mice with *** to DDX3X^(fl/fl) littermates,DDX3^(XΔMφ)mice showed improved liver histology in nutritional steatohepatitis *** of macrophage DDX3X inhibited NLRP3 inflammasome-mediated pyroptosis,causing anti-inflammatory M2 polarization and alleviating hepatocyte steatohepatitic ***3X^(Δhep) mice developed marked steatohepatitis in multiple nutritional steatohepatitis models compared to DDX3X^(fl/fl) ***3X-deleted hepatocytes showed impaired SG assembly,leading to increased sensitivity and intolerance to metabolic stimulation and resultant *** conclusion,DDX3X plays opposite roles in different cell types during the progression of NASH.A better understanding of the cell-specific differences in the crosstalk between SG formation and NLRP3 activation is crucial for developing pr

关键词： NLRP3 impaired inhibited

MAGNESIUM-NETHAN0L REDUCTION OF 2-(1, 3-DITHIAN-2-YLIDENE)-I-ARYL KETONES:A FACILE ROUTE TO α-ARYL-β-(1,3-DITHANE)ALCOHOLS

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Chinese Chemical Letters 1992年第6期3卷 417-418页

作者： Yu Lan HU Qun LIU De Neng DONG department oF chemistry, northeast normal university, changchun 130024

In a facile procedure, 2-(1, 3-dithian-2-ylidene)-l-aryl ketones 1 vere reduced with magnesium in methanol to give α-aryl-β -(1, 3-dithane) alcohols 2 in good to high yields.

关键词： ARYL DITHANE)ALCOHOLS DITHIAN-2-YLIDENE I-ARYL KETONES MAGNESIUM-NETHAN0L REDUCTION OF 2

The Difference of Electronic Properties and the Effect of Hydrogen－bondofcis－and trans－Polyazomethine

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Chemical Research in Chinese Universities 1994年第3期10卷 220-226页

作者： WANG Rong-shun, PAN Xiu-mei and SU Zhong-min (department of chemistry , northeast normal university, changchun , 130024)

he difference of cis -and trans-polyazoniethines were investigated using SCF- LCAO-MO AMl and CNDO '2-CO methods. Energy band structures and charge distribution of different isomers were obtained. The formation of C-H -N hydro- gen-bonds in the polymers and different contribution to cis-, trans -isomer stability have been systeniatically analysed in theory. The difference of electronic propcrties before and after the formation of hydrogen-bond were intensively studied.

关键词： Polyazomethine Electronic property. Hydrogen-bond CNDO/2-CO

A Plasma Membrane Polarity Sensor Harnessing Conjoined Twisted Intramolecular Charge Transfer Modulation and Charge Number Control Strategy

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CCS chemistry 2024年第3期6卷 733-748页

作者： Yu-Qiang zhao Le Yu Liping Zhu Jinsong liang Ying Zhou Jong Seung Kim College of Chemical Science and Technology Yunnan UniversityKunming 650091 department of chemistry Korea UniversitySeoul 02841 TheranoChem Incorporation Seoul 02856

Polarity is a critical microenvironmental factor of the plasma membrane,which can offer valuable insights into various biological ***,we proposed a novel strategy for the construction of fluorescent agents to measure plasma membrane polarity by conjoining twisted intramolecular charge transfer(TICT)modulation and charge number *** is shown that compounds with a stronger TICT tendency are more sensitive to polarity shifts due to the number of dialkylated amino groups present(from 1 to 3),and the molecules with two or more charged centers remain in the plasma ***,we developed two fluorescent agents with high polarity sensitivity,excellent turn-on ratios,and superior ability,to target the plasma *** the wash-free fluorescence imaging and fluorescence lifetime tests,our designed agent could detect plasma membrane polarity with high precision,allowing effective distinction between cancer cells and normal cells based on their differences in plasma membrane ***,both fluorescence and fluorescence lifetime changes of the plasma membrane in the ferroptosis model established by Sorafenib confirmed an increase in plasma membrane polarity during cell ferroptosis.

关键词： membrane polarity fluorescence agents fluorescence imaging fluorescence lifetime imaging

THEORETICAL STUDIES ON THE REACTION MECHANISM OF AMMONIA WITH FORMALDEHY DE

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Chinese Chemical Letters 1990年第2期1卷 101-104页

作者： Yun Zhu HAN Qiu Chang zhao department of chemistry,Liaocheng Teachers College,Liaocheng Shandong 252059 Cheng Da zhao department of chemistry,northeast normal university,changchun,130024

The reaction mechanism of ammonia with formaldehyde was investigated by using the intrinsic reaction coordinate(IRC)method on the ab initio RHF/STO-3G basis set. our results indicate that the reaction proceeds in two stages:the first step yields the molecular complex and the second one is the rearrangement from molecular complex to the reaction proauct.

关键词： IRC THEORETICAL STUDIES ON THE REACTION MECHANISM OF AMMONIA WITH FORMALDEHY DE

Comparison of different plasma chambers in microwave ion source for the intense neutron tube

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Nuclear Science and Techniques 2003年第1期14卷 83-85页

作者： JING shi-Wei, LIU Lin-Mao (Physics department, northeast normal university, changchun 130024) Physics department Northeast Normal University Changchun 130024

The microwave absorption efficiency, which is relevant to magnet field and its distribution, is a major parameter of the microwave ion source (MWIS) for the intense neutron tube. Based on previous work, the relations between microwave absorption efficiency and plasma chamber structure and thickness of the microwave introduction window are studied. The microwave absorption efficiency reaches to 100% when plasma chamber is 100mm long and the window thickness is 30mm. The microwave absorption efficiency as a function of pressure is also presented.

关键词：等离子体微波离子谱微波吸收功率 MWIS 高密度中子管

Long-wave infrared emission properties of strain-balanced InAs/In_(x)Ga_(1-x)As_(y)Sb_(1-y)type-Ⅱsuperlattice on different substrates

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Rare Metals 2024年第7期43卷 3194-3204页

作者： Chao shi Xuan Fang Hong-Bin zhao Deng-Kui Wang Xi Chen Dan Fang Dong-Bo Wang Xiao-Hua Wang Jin-Hua Li State Key Laboratory of High Power Semiconductor Lasers School of PhysicsChangchun University of Science and TechnologyChangchun 130022China State Key Laboratory of Advanced Materials for Smart Sensing China General Research Institute for Nonferrous MetalsBeijing 100088China department of Opto-Electronic Information Science School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China

High-performance type-Ⅱsuperlattices ofⅢ-Ⅴsemiconductor materials play an important role in the development and application of infrared optoelectronic *** the quality of epitaxial materials and clarifying the luminescent mechanism are of great significance for practic al applic *** this work,strain-balanced and high-quality In As/In_(x)Ga_(1-x)As_(y)Sb_(1-y)superlattices without lattice mismatch were achieved on InAs and GaSb substrates *** grown on In As substrate could exhibit higher crystal quality and surface flatness based on high-resolution X-ray diffraction(HRXRD)and atomic force microscopy(AFM)measurements'***,the strain distribution phenomenon from geometric phase analysis indicates that fluctuations of alloy compositions in superlattices on GaSb substrate are more *** addition,the optical properties of superlattices grown on different substrates are discussed *** of the difference in fluctuations of element composition and interface roughness of superlattices on different substrates,the superlattices grown on In As substrate would have higher integral intensity and narrower full-width at half maximum of long-wave infrared ***,the thermal quenching of emission intensity indicates that the superlattices grown on the In As substrate have better recombination ability,which is beneficial for increasing the operating temperature of infrared optoelectronic devices based on this type of superlattices.

关键词： Photoluminescence Alloy compositions fluctuations InAs(Sb)/In_(x)Ga_(1-x)As_(y)Sb_(1-y) Type-Ⅱsuperlattice Substrate