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NEOARCTIN A FROM ARCTIUM LAPPA L

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Chinese Chemical Letters 1995年第3期6卷 217-220页

作者： Wang, HY yang, js Chinese Acad Med Sci Inst Med Biotechnol Beijing 100050 Peoples R China Chinese Acad Med Sci Inst Med Plant Dev Beijing 100094 Peoples R China

A now lignan, neoarctin A, has been isolated from the seeds of Arctium lappa L. and the structure elucidated on the basis of spectral analysis. In the previous paper([1]) we reported the isolation and identification of chemical constituents from the roots of Arctium lappa collected from Akesu, the Xinjiang Autonomous Region. In the present paper,we report the structure elucidation of a new lignan from the roots of the same plant.

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STRUCTURE　OF　GANODERIC　ACID　DM，A　NEW　TRITERPENOID　FROM　THE　FRUITING　BODY　OF　GANODERMA　LUCIDUM

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Chinese Chemical Letters 1995年第12期6卷 1051-1052页

作者： Cai, H Wang, FS yang, js Zhang, YM Univ Agr & Anim Sci PLA Changchun 130062 Peoples R China Chinese Acad Med Sci Inst Med Plant Dev Beijing 100094 Peoples R China

A new lanostane-type triterpenoid, ganoderic acid DM was isolated from the cultured fruiting body of G. lucidum. The structure of ganoderic acid DM (1) was determined by spectral data. It was ldentifled as 3. 7-dioxo-... 详细信息

关键词： ACID BODY DM

A New Anthraquinone from Clinopodium polycephalum Glyceroyl-1,6,8-trihydroxy-3-methyl-9,10-dioxo-2-anthracene Carboxylate

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Chinese Chemical Letters 1998年第2期9卷 143-144页

作者： Chen, JY Chen, JM Wan, CL yang, js Xiao, PG Chinese Acad Med Sci Inst Med Plant Dev Peking Union Med Coll Beijing 100094 Peoples R China

A new anthraquinone, Glyceroyl-1,6,8-trihydroxy-3-methyl-9, 10-dioxo-2-anthracene carboxylate I, was isolated from Clinopodium polycephalum. The chemical structure was determined by spectroscopic methods.

关键词： Clinopodium polycephalum new anthraquinone structure determination

EPIMEDOKOREANONE A FROM THE AERIAL PARTS O FEPIMEDIUM KOREANUM NAKAI

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Chinese Chemical Letters 1996年第1期7卷 23-24页

作者： Li, WK yang, js Xiao, PG Pan, JQ Lu, MJ Zhang, RY CHINESE ACAD MED SCI INST MED PLANT DEVBEIJING 100094PEOPLES R CHINA BEIJING UNION MED COLL BEIJING 100094PEOPLES R CHINA BEIJING UNIV DEPT CHEMBEIJING 100871PEOPLES R CHINA BEIJING MED UNIV SCH PHARMACEUT SCIBEIJING 100083PEOPLES R CHINA

A new alpha-pyrone derivative, epimedokoreanone A was isolated from the aerial parts of Epimedium koreanum Nakai. Its structure was determined by spectroscopic methods (IR, MS, H-1 NMR, C-13 NMR, DEPT, H-1-C-13 COSY a...

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A NEW TRITERPENOID FROM THE FUNGUS GANODERMA LUCIDUM

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Chinese Chemical Letters 1995年第12期6卷 1049-1050页

作者： Wang, FS Cai, H Jing, ZX yang, js Zhang, YM Univ Agr & Anim Sci PLA Changchun 130062 Peoples R China Chinese Acad Med Sci Inst Med Plant Dev Beijing 100094 Peoples R China

The structure of a new triterpenoid, named gonolactone A, isolated from the fruiting body of Ganoderma lucidum,was determined by spectroscopic methods. This compound was identified as 7 beta -hydroxy-3. 11,15-trioxo-l...

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Fresh-Keeping Decision and Coordination of Fresh Agricultural Product Supply Chain Considering Carbon Cap-and-Trade under Different Dominance

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Journal of Systems Science and Systems Engineering 2024年第1期33卷 30-51页

作者： yang yang Guanxin Yao China Institute for Agricultural Equipment Industrial Development Jiangsu UniversityZhenjiang212013China Jiangsu Modern Logistics Research Base Yangzhou UniversityYangzhou225009China

In the context of low carbon,this paper discussed the impact of the carbon cap-and-trade policy on the fresh-keeping decision-making of two-echelon fresh agricultural product supply chains under different dominance,and designed cost-sharing contracts to coordinate the supply chain of fresh agricultural products dominated by suppliers and retailers *** results showed that:dominance has no effect on the fresh-keeping decision and total revenue of fresh agricultural product supply chain,but it affects the internal income distribution,and dominance does not always bring more benefits;the implementation of carbon cap-and-trade reduces the fresh-keeping decision-making of fresh agricultural products supply chain and reduces the free-rider income of followers;the role of higher carbon trading price is twofold,which not only brings about the speculation of leading enterprises,but also promotes the application of low-carbon technologies;consumers’high preference for freshness,low-cost and high-efficiency low-carbon technology are all conducive to improving the fresh-keeping efforts and benefits of the supply chain;cost-sharing contracts can coordinate the supply chain of fresh agricultural products.

关键词： Dominant power carbon cap-and-trade policy fresh agricultural product supply chain fresh-keeping decision-making

Overview of radar detection methods for low altitude targets in marine environments

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Journal of Systems Engineering and Electronics 2024年第1期35卷 1-13页

作者： yang Yong yang Boyu School of Electronic Science National University of Defense TechnologyChangsha 410073China

In this paper,a comprehensive overview of radar detection methods for low-altitude targets in maritime environments is presented,focusing on the challenges posed by sea clutter and multipath *** performance of the radar detection methods under sea clutter,multipath,and combined conditions is categorized and summarized,and future research directions are outlined to enhance radar detection performance for low-altitude targets in maritime environments.

关键词： radar sea clutter multipath scattering detection low altitude target

Selective nano-buckling improves the performance of graphene logic transistors

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National Science Review 2024年第2期11卷 95-96页

作者： Tong yang Ming yang Department of Applied Physics The Hong Kong Polytechnic University Research Centre for Nanoscience and Nanotechnology The Hong Kong Polytechnic University

The massive integration of silicon-based transistors into modern electronic devices greatly increases power consumption and heat generation/dissipation[1]. In this concern, transistors based on atomically-thin graphene that exhibit high electric and thermoelectric conductivities with negligible contact resistance,

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New Pyrones from Hypericum Japonicum

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Chinese Chemical Letters 1996年第12期7卷 1095-1096页

作者： Wu, QL Liao, YH Wang, SP Wang, LW Feng, YX yang, js Xiao, PG Hong, SL CHINESE ACAD MED SCI INST MED PLANT DEVBEIJING 100094PEOPLES R CHINA BEIJING UNION MED COLL BEIJING 100094PEOPLES R CHINA

From the aerial part of Hypericum japonicum Thunb. ex Murray, two new pyrones, japonicumone-A and -B, were isolated and their structures were determined on basis of spectroscopic evidence.

关键词： New Pyrones from Hypericum Japonicum