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Studies on the Relationship between the Helical Structure and Optical Activity of Some Chiral Cyclic Esters Ⅱ

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Chinese Chemical Letters 1997年第2期8卷 141-144页

作者： Ai Hua NIE Xiu Lin YE qi yi xing(Department of Chemistry,Pcking University,Beijing 100871) Department of Chemistry Peking University Beijing 100871 China

A method for the analysis of the relationship between the helical structure and optical activity was proposed by the study of the conformations and X-ray diffraction structures of some cyclic esters prepared by esterification of L-(-)-2.3-O-methylidene threitol and L-(+)-2,3-O-isopropplidene threitol with alkanedioyl dichlorides and o-,m-,and p-phthaloyl dichlorides.

关键词： Activity Cl Studies on the Relationship between the Helical Structure and Optical Activity of Some Chiral Cyclic Esters

ISOLATION AND IDENTIFICATION OF β-N-OXALO-L-α,β-DIAMINOPROPIONIC ACID AND ITS ISOMER α-N-OXALO-L-α,β-DIAMINOPROPIONIC ACID FROM PANAX SPECIES

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Chinese Chemical Letters 1992年第7期3卷 517-520页

作者： yi Cheng LONG Fei Ning YE Yun Hua YE qi yi xing Department of Chemistry Peking UniversityBeijing 100871 Research Institute of Petroleum Processing Beijing 100083

The neuroexcitotoxic nonprotein amino acid β-N-oxalo-L-α, β-diaminopropionic acid (β-N-ODAP)and its isomer a-N-oxalo-L-α, β-diaminopropionic acid (α-N-ODAP)in Panax ginseng C. A. Meyer(cultivated ih Northeastern China), Panax quinquefolius L., Panax notoginseng F.H. Chen (cultivated in Southwestern China), Korean red ginseng and Jilin red ginseng were isolated and identified. Efficient separation and purification methods for β-N-ODAP and α-N-ODAP were developed.

关键词： DIAMINOPROPIONIC ACID AND ITS ISOMER DIAMINOPROPIONIC ACID FROM PANAX SPECIES ISOLATION AND IDENTIFICATION OF N-OXALO-L ACID ITS

Synthesis and Steric Structure of β-Lactam Derivatives of 2,4-Diaryl-2,3-dihydro-1,5-benzothiazepines

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Chinese Chemical Letters 1998年第10期9卷 919-921页

作者： qi yi xing Yuan LI Cat Yun DU qiu qing YANGNa SUN, Sheng JIN(Bioorganic Molecular Engineering Laboratory, Institute of Chemistry and Molecular Engineering, Peking University, Beijing 100871 Department of Chemistry, Experiment Center, Hebei Normal Unive Bioorg. Molec. Eng. Laboratory Inst. of Chem./Molecular Engineering Peking University Beijing 100871 China Department of Chemistry Experiment Center Hebei Normal University Shijiazhuang 050016 China Department of Basic Course Hebei Handan Agricultural College Handan 056000 China

This paper reports the primary results of the study on β-lactam derivatives of 2,4-diaryl-2, 3-di hydro-1, 5 -benzothiazepines. Five titie compounds have been synthesized, and their configUration and conformation wer... 详细信息

关键词： 1,5-benzothiazopine β-lactam Cycloaddition

Fangji Fuling Decoction Alleviates Sepsis by Blocking MAPK14/FOXO3A Signaling Pathway

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Chinese Journal of Integrative Medicine 2024年第3期30卷 230-242页

作者： WANG yi CHEN Ming-qi DAI Lin-feng ZHANG Hai-dong WANG xing Department of Critical Care Medicine Changzhou Hospital of Traditional of Chinese Medicine Affiliated to Nanjing University of Chinese MedicineChangzhouJiangsu Province213000China Department of Critical Care Medicine Jiangsu Province Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese MedicineNanjing210029China

Objective:To examine the therapeutic effect of Fangji Fuling Decoction(FFD) on sepsis through network pharmacological analysis combined with in vitro and in vivo ***:A sepsis mouse model was constructed through intraperitoneal injection of 20 mg/kg lipopolysaccharide(LPS).RAW264.7 cells were stimulated by 250 ng/m L LPS to establish an in vitro cell *** pharmacology analysis identified the key molecular pathway associated with FFD in *** ectopic expression and depletion experiments,the effect of FFD on multiple organ damage in septic mice,as well as on cell proliferation and apoptosis in relation to the mitogen-activated protein kinase 14/Forkhead Box O 3A(MAPK14/FOXO3A) signaling pathway,was ***:FFD reduced organ damage and inflammation in LPS-induced septic mice and suppressed LPS-induced macrophage apoptosis and inflammation in vitro(P<0.05).Network pharmacology analysis showed that FFD could regulate the MAPK14/FOXO signaling pathway during *** confirmed by in vitro cell experiments,FFD inhibited the MAPK14 signaling pathway or FOXO3A expression to relieve LPS-induced macrophage apoptosis and inflammation(P<0.05).Furthermore,FFD inhibited the MAPK14/FOXO3A signaling pathway to inhibit LPS-induced macrophage apoptosis in the lung tissue of septic mice(P<0.05).Conclusion:FFD could ameliorate the LPS-induced inflammatory response in septic mice by inhibiting the MAPK14/FOXO3A signaling pathway.

关键词： sepsis Fangji Fuling Decoction mitogen-activated protein kinase 14/Forkhead Box O 3A signaling pathway inflammatory response apoptosis lung injury Chinese medicine

STUDIES　ON　THE　RELATIONSHIP　BETWEEN　THE　HELICAL　STRUCTURE　AND　OPTICAL　ACTIVITIES　OF　SOME　CHIRAL　CYCLICESTERS　Ⅰ

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Chinese Chemical Letters 1996年第7期7卷 627-630页

作者： Bing DENG(Department of Chemistry,ShanXi University,TaiYuan,030006)Xiu Lin YE and qi yi xing(Department of Chemistry,Peking University,Beijing, 100871) Department of Chemistry Shanxi University Taiyuan 030006 Department of Chemistry Peking University Beijing 100871

A method to analyze the relationship between the helical structure and optivity was proposedby the study of the conformations and X-ray structures of some cyclic esters possessing a C2-synimetry elementwhich were prep...

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Degradation analysis and doping modification optimization for high-voltage P-type layered cathode in sodium-ion batteries

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Journal of Energy Chemistry 2024年第2期89卷 1-9,I0002页

作者： Bao Zhang yi Zhao Minghuang Li qi Wang Lei Cheng Lei Ming xing Ou Xiaowei Wang National Engineering Laboratory for High-Efficiency Recovery of Refractory Nonferrous Metals School of Metallurgy and EnvironmentCentral South UniversityChangsha 410083HunanChina Zhejiang Power New Energy Co. LTDZhuji 311800ZhejiangChina

Advancing high-voltage stability of layered sodium-ion oxides represents a pivotal avenue for their progress in energy storage *** this,a comprehensive understanding of the mechanisms underpinning their structural deterioration at elevated voltages remains insufficiently *** this study,we unveil a layer delamination phenomenon of Na_(0.67)Ni_(0.3)Mn_(0.7)O_(2)(NNM)within the 2.0-4.3 V voltage,attributed to considerable volumetric fluctuations along the c-axis and lattice oxygen reactions induced by the simultaneous Ni^(3+)/Ni^(4+)and anion redox *** introducing Mg doping to diminished Ni-O antibonding,the anion oxidation-reduction reactions are effectively mitigated,and the structural integrity of the P2 phase remains firmly intact,safeguarding active sites and precluding the formation of novel *** Na_(0.67)Mg_(0.05)Ni_(0.25)Mn_(0.7)O_(2)(NMNM-5)exhibits a specific capacity of100.7 mA h g^(-1),signifying an 83%improvement compared to the NNM material within the voltage of2.0-4.3 *** investigation underscores the intricate interplay between high-voltage stability and structural degradation mechanisms in layered sodium-ion oxides.

关键词： Soidum ion batteries Layer cathode materials P-type High-voltage performance Degradation analysis

Recent Progress on Water-based Liquid Embolic Agents in Endovascular Treatment

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Chemical Research in Chinese Universities 2024年第5期40卷 776-785页

作者： qi yi FAN Hailong Department of Neurosurgery Faculty of Medicine and Graduate School of MedicineHokkaido UniversitySapporo060-8638Japan Institute for Chemical Reaction Design and Discovery(WPI-ICReDD) Hokkaido UniversitySapporo001-0021Japan

Vascular embolization treatment,a minimally invasive surgery for various blood vessel-related conditions,has emerged as a crucial method in treating such as hemorrhage,arteriovenous malformation,aneurysms,and hypervascular *** embolic agents are gaining prominence due to their distinct advantage in infiltrating distal regions,expanding the scope of embolization beyond the reach of solid *** strides in biomaterials and technologies have spurred the development of novel liquid embolic agents,addressing challenges posed by traditional *** mini-review provides a concise overview of the recent progress in water-based liquid embolic agents,highlighting their potential to overcome limitations associated with current embolic *** presenting selected research outcomes,we illuminate advancements that enhance the efficacy of liquid embolic ***,the review outlines essential properties for effective liquid embolic agents,offering insights for future developments in this field.

关键词： Endovascular treatment Lquid embolic agent Hydrogel

A PRELIMINARY STUDY OF THE WATER—SOLUBLE OLIGOPEPTIDES AND AMINO ACIDS OF GINSENG

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Chinese Chemical Letters 1990年第1期1卷 51-54页

作者： Liu YANG Yun Hua YE qi yi xing Department of Chemistry,Peking University Beijing,100871

γ-Amino butyric acid(GABA)and several γ-glutamyl oligopeptides were isolated and identified from water-extract of ginseng.

关键词： A PRELIMINARY STUDY OF THE WATER SOLUBLE OLIGOPEPTIDES AND AMINO ACIDS OF GINSENG TFA

Oxidation of emerging organic contaminants by in-situ H_(2)O_(2) fenton system

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Green Energy & Environment 2024年第3期9卷 417-434页

作者： Yuqin Ni Chuxiang Zhou Mingyang xing yi Zhou State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes School of Resources&Environmental EngineeringEast China University of Science and TechnologyShanghai200237China Key Laboratory for Advanced Materials and Institute of Fine Chemicals National Engineering Laboratory for Industrial Wastewater TreatmentSchool of Chemistry and Molecular EngineeringEast China University of Science and Technology130 Meilong RoadShanghai200237China Department of Applied Natural Sciences Technische Hochschule LubeckMonkhofer Weg 23923562 LubeckGermany

The existence and risk of emerging organic contaminants(EOCs)have been under consideration and paid much effort to degrade these *** system is one of the most widely used technologies to solve this *** original Fenton system relies on the hydroxyl radicals produced by Fe(Ⅱ)/H_(2)O_(2) to oxidize the organic ***,the application of the Fenton system is limited by its low iron cycling efficiency and the high risks of hydrogen peroxide transportation and *** introduction of external energy(including light and electricity etc.)can effectively promote the Fe(Ⅲ)/Fe(Ⅱ)cycle and the reduction of oxygen to produce hydrogen peroxide in *** review introduces three in-situ Fenton systems,which are electro-Fenton,Photo-Fenton,and chemical *** mechanism,influencing factors,and catalysts of these three in-situ Fenton systems in degrading EOCs are discussed *** review strengthens the understanding of Fenton and in-situ Fenton systems in degradation,offering further insight into the real application of the in-situ Fenton system in the removal of EOCs.

关键词： In-situ H_(2)O_(2)production Fenton Emerging organic contaminants Photocatalysis Electrocatalysis