In the present study, we evaluated the genetic diversity of Panax notoginseng F H Chen, a domesticated species, and P. stipuleanatus H T Tsai et K M Feng, an endangered wild species in southeastern Yunnan and adjacent...In the present study, we evaluated the genetic diversity of Panax notoginseng F H Chen, a domesticated species, and P. stipuleanatus H T Tsai et K M Feng, an endangered wild species in southeastern Yunnan and adjacent areas in Vietnam, using sequences of the internal transcribed spacer (ITS) regions of nuclear ribosomal DNA and amplified fragment length polymorphism (AFLP) markers. Twenty-four accessions from three plantations of P. notoginseng and 51 samples from eight populations of P. stipuleanatus were assayed. A total of 694 bp of partial sequences of 18S, ITS 1, 5.8S, ITS2, and partial sequences of 26S were obtained. No sequence variation was detected within P. notoginseng and nine sites (1.30%) were variable in P. stipuleanatus. Two-thirds of the variable sites were found between Langqiao and other populations. In P. notoginseng, four pairs of AFLP primer combinations generated 312 bands, of which 240 (76.9%) were polymorphic and 60.15% of the polymorphisms were harbored within plantations. Approximately 41.0% and 66.9% of bands were polymorphic in population D7 and 5589, respectively. In P.stipuleanatus, the same four primer combinations produced 346 bands, of which 334 (96.5%) were polymorphic and approximately 62.14% of polymorphisms were maintained within populations. Considerable variations were observed. The percentage of polymorphic bands ranged from 50.2% to 84.9% and the average over populations was 70.9%. Cluster analysis did not show correlation of genetic differentiation with the distinctive leaf morphology of P. stipuleanatus (i.e. one form with bipinnatifid leaflets and the other with undivided leaflets). Because over 40% of genetic variations were maintained among populations and because of the very restricted distribution of P. stipuleanatus, all natural populations of this species should be conserved in situ. Considering that there are variations in P. notoginseng within and among plantations, we suggest establishing a genetic resource conservation garden or reintroducing P. notoginseng in展开更多
One new Iriterpene saponin was isolated from Panaxjaponicus C. A. Meyer var major （Burk.） C. Y. Wu et K. M. Feng, and established as oleanolic acid 3-O-[β-D-glucopyranosyl-（1 →2）-β-D-glucuronopyranosyl-6＇-O-n-...One new Iriterpene saponin was isolated from Panaxjaponicus C. A. Meyer var major （Burk.） C. Y. Wu et K. M. Feng, and established as oleanolic acid 3-O-[β-D-glucopyranosyl-（1 →2）-β-D-glucuronopyranosyl-6＇-O-n-butyl ester] which showed mod- erate antitumor activities against the A2780 cells and OVCAR-3 cells. Its structure was established by means of spectral data, particularly NMR, including HSQC and HMBC techniques.展开更多
Catalysts and ligands possessing the great ability to tolerate over a wide range of mechanistically unrelated reactions are remarked as"privileged",which are rather scarce but extremely meaningful in asymmet...Catalysts and ligands possessing the great ability to tolerate over a wide range of mechanistically unrelated reactions are remarked as"privileged",which are rather scarce but extremely meaningful in asymmetric catalysis.Feng and co-workers have developed a library of conformationally flexible,C2-symmetric N,N'-dioxide amide compounds with original design and featured structure(named as Feng ligand now).They were initially reported as chiral organocatalysts in 2005 and have been further developed as a new class of privileged chiral ligands since 2006.Tremendous success,including versatile coordination chemistry with plenty of metal sources(main-group metals,transition metals,and rare-earth metals),a truly broad scope of asymmetric reactions(more than 50 types),diverse areas of catalysis(organocatalysis,Lewis-acid catalysis,bimetallic relay catalysis,and photocatalysis),numerous synthetic applications of bioactive compounds,has been achieved using Feng N,N'-dioxide.Besides,they demonstrate that chiral ligands with conformationally flexible property can offer excellent chiral environment as well,which challenges the conventional idea preferring rigid structures in the design of chiral ligands.Herein,we briefly introduced the discovery of Feng ligand and the millstones during the development.We also covered the successful applications of Feng ligand by other scientists as well as novel chiral ligands inspired by them.展开更多
This paper takes Chinese“Feng Shui”as a starting point to study German missionary Ernest Eitel’s writings on Feng Shui and to explore the Chinese images constructed by him in his writings.This study begins by analy...This paper takes Chinese“Feng Shui”as a starting point to study German missionary Ernest Eitel’s writings on Feng Shui and to explore the Chinese images constructed by him in his writings.This study begins by analyzing the structure of Eitel’s work Feng Shui,or,the Rudiments of Natural Science in China,and the Chinese images that he constructed in his work.The study argues that,due to his multiple identities as a missionary,a believer in colonialism,an educator,and a researcher of culture,as well as the influence of what he saw and heard in China,Eitel,despite his exhaustive examination of Chinese Feng Shui culture,ultimately,due to his own biases brought about by his own experiences and cultural differences,produced a paradoxical discourse on Feng Shui:he understood it as a Chinese natural science system,but an unsystematic one.As a result,Eitel also built a contradictory image of the Chinese:they hold a belief in the“animism”and respect for ancestral observations of nature,which ultimately translates into a superstitious belief in nature and an ignorance of true science.展开更多
For more than 60 years,Mr.Xu Yuanchong has been devoted to education.He has not only made remarkable achievements in translating from and into Chinese,English,French and other languages,but has also developed his own ...For more than 60 years,Mr.Xu Yuanchong has been devoted to education.He has not only made remarkable achievements in translating from and into Chinese,English,French and other languages,but has also developed his own unique concept of translation.Since 1950,he has always adhered to the“Three Beauties Theory”,believing that translation should not only rely on the original text,but also realize the“beauty of meaning”,“beauty of sound”,and“beauty of form”.Based on Xu Yuanchong’s“Three Beauties Theory”,this paper takes Zheng Zhenduo’s and Feng Tang’s Chinese translations of Stray Birds as an example to explore in depth the specifics of poetry translation theory.The study summarizes the similarities and differences between these two translations in embodying the“three beauties”,providing insights into the Chinese translation techniques of philosophical prose poems.This endeavor seeks to offer valuable insights for the comparative study of Stray Birds translations。展开更多
In this editorial,an Associate Editor-in-Chief of the Journal of Palaeogeography(JoP)reminisces his publication experience in JoP during the period 2014-2024.1)During a period of nine years,he contributed eight review...In this editorial,an Associate Editor-in-Chief of the Journal of Palaeogeography(JoP)reminisces his publication experience in JoP during the period 2014-2024.1)During a period of nine years,he contributed eight review articles,three discussions,two replies,one book review,one glossary,and one tribute to the first Editor-in-Chief Prof.Zeng-Zhao Feng.His contributions totaled 534 printed pages.2)His contributions examined 19 different domains,such as landslides,submarine fans,seismites,SSDS,hyperpycnites,rivers,etc.3)His contributions coincided with the formative years of JoP.4)The impact of his articles is evident from the Stats published by ResearchGate.For example,his review article“The Landslide Problem”has reached11,611 Reads and 186 Citations after nine years of publication in 2015.5)In 2023,the CNKI(China National Knowledge Infrastructure)recognized his article“Submarine fans:a critical retrospective(1950-2015)”as the Top-1%most-highly cited publications in the Journal of Palaeogeography published during a 10-year survey period:2012-2022.6)He was inducted as a Founding Member of the International Society of Palaeogeography(ISP)at Changping District of China University of Petroleum(Beijing),Beijing on July 16,2022.7)His JoP editorship during the past 10 years has been the most challenging,inspiring,and rewarding experience of his global scientific journey spanning over six decades(1962-2024).展开更多
In 2005 China carried out a new geodetic campaign for the height determination of Qo- molangma Feng——Mt. Everest (QF in short). The technical progresses in geodesy for the 2005 campaign are presented in the paper. G...In 2005 China carried out a new geodetic campaign for the height determination of Qo- molangma Feng——Mt. Everest (QF in short). The technical progresses in geodesy for the 2005 campaign are presented in the paper. GPS positioning was the key technique in the campaign. After summarizing the experiences and lessons of the GPS positioning on the QF summit in the previous QF height determination campaigns, some measures were taken to raise the accuracy and reliability of the height determination with GPS techniques. In order to raise the accuracy of the height deter- mination of the QF summit with classical geodetic techniques, laser ranging was used together with the trigonometric levelling in the 2005 campaign. It is the first time in China the thickness of the ice-snow layer on the QF summit was measured by ground penetrating radar integrated with GPS. The local gravity field and geoid in the QF area was improved on the basis of earth gravity field model integrated with new ground gravity data, DTM data and GPS leveling data in the QF area. In the 2005 campaign the normal height and orthometric height (height above sea level) of the snow surface of the QF summit were obtained as 8846.67 m and 8847.93 m respectively. The orthometric height of the rock surface of the QF summit is 8844.43 m,and the thickness of the ice-snow layer on the QF summit is 3.50 m.展开更多
基金国家重点基础研究发展计划(973计划)，中国科学院知识创新工程项目，国家自然科学基金，the Outstanding Overseas Chinese Grant of the Chinese Academy of Sciences, and the U.S. National Science Foundation Supported by，the U.S. National Science Foundation
文摘In the present study, we evaluated the genetic diversity of Panax notoginseng F H Chen, a domesticated species, and P. stipuleanatus H T Tsai et K M Feng, an endangered wild species in southeastern Yunnan and adjacent areas in Vietnam, using sequences of the internal transcribed spacer (ITS) regions of nuclear ribosomal DNA and amplified fragment length polymorphism (AFLP) markers. Twenty-four accessions from three plantations of P. notoginseng and 51 samples from eight populations of P. stipuleanatus were assayed. A total of 694 bp of partial sequences of 18S, ITS 1, 5.8S, ITS2, and partial sequences of 26S were obtained. No sequence variation was detected within P. notoginseng and nine sites (1.30%) were variable in P. stipuleanatus. Two-thirds of the variable sites were found between Langqiao and other populations. In P. notoginseng, four pairs of AFLP primer combinations generated 312 bands, of which 240 (76.9%) were polymorphic and 60.15% of the polymorphisms were harbored within plantations. Approximately 41.0% and 66.9% of bands were polymorphic in population D7 and 5589, respectively. In P.stipuleanatus, the same four primer combinations produced 346 bands, of which 334 (96.5%) were polymorphic and approximately 62.14% of polymorphisms were maintained within populations. Considerable variations were observed. The percentage of polymorphic bands ranged from 50.2% to 84.9% and the average over populations was 70.9%. Cluster analysis did not show correlation of genetic differentiation with the distinctive leaf morphology of P. stipuleanatus (i.e. one form with bipinnatifid leaflets and the other with undivided leaflets). Because over 40% of genetic variations were maintained among populations and because of the very restricted distribution of P. stipuleanatus, all natural populations of this species should be conserved in situ. Considering that there are variations in P. notoginseng within and among plantations, we suggest establishing a genetic resource conservation garden or reintroducing P. notoginseng in
基金financially supported by Chinese Academy of Nutritional Sciences,Shanghai Institutes for Biological Sciences
文摘One new Iriterpene saponin was isolated from Panaxjaponicus C. A. Meyer var major （Burk.） C. Y. Wu et K. M. Feng, and established as oleanolic acid 3-O-[β-D-glucopyranosyl-（1 →2）-β-D-glucuronopyranosyl-6＇-O-n-butyl ester] which showed mod- erate antitumor activities against the A2780 cells and OVCAR-3 cells. Its structure was established by means of spectral data, particularly NMR, including HSQC and HMBC techniques.
基金The authors acknowledge financial support from Zhejiang University,"1000-Youth Talents Plan"and the Fundamental Research Funds for the Central Universities(2020QNA3004).
文摘Catalysts and ligands possessing the great ability to tolerate over a wide range of mechanistically unrelated reactions are remarked as"privileged",which are rather scarce but extremely meaningful in asymmetric catalysis.Feng and co-workers have developed a library of conformationally flexible,C2-symmetric N,N'-dioxide amide compounds with original design and featured structure(named as Feng ligand now).They were initially reported as chiral organocatalysts in 2005 and have been further developed as a new class of privileged chiral ligands since 2006.Tremendous success,including versatile coordination chemistry with plenty of metal sources(main-group metals,transition metals,and rare-earth metals),a truly broad scope of asymmetric reactions(more than 50 types),diverse areas of catalysis(organocatalysis,Lewis-acid catalysis,bimetallic relay catalysis,and photocatalysis),numerous synthetic applications of bioactive compounds,has been achieved using Feng N,N'-dioxide.Besides,they demonstrate that chiral ligands with conformationally flexible property can offer excellent chiral environment as well,which challenges the conventional idea preferring rigid structures in the design of chiral ligands.Herein,we briefly introduced the discovery of Feng ligand and the millstones during the development.We also covered the successful applications of Feng ligand by other scientists as well as novel chiral ligands inspired by them.
文摘This paper takes Chinese“Feng Shui”as a starting point to study German missionary Ernest Eitel’s writings on Feng Shui and to explore the Chinese images constructed by him in his writings.This study begins by analyzing the structure of Eitel’s work Feng Shui,or,the Rudiments of Natural Science in China,and the Chinese images that he constructed in his work.The study argues that,due to his multiple identities as a missionary,a believer in colonialism,an educator,and a researcher of culture,as well as the influence of what he saw and heard in China,Eitel,despite his exhaustive examination of Chinese Feng Shui culture,ultimately,due to his own biases brought about by his own experiences and cultural differences,produced a paradoxical discourse on Feng Shui:he understood it as a Chinese natural science system,but an unsystematic one.As a result,Eitel also built a contradictory image of the Chinese:they hold a belief in the“animism”and respect for ancestral observations of nature,which ultimately translates into a superstitious belief in nature and an ignorance of true science.
文摘For more than 60 years,Mr.Xu Yuanchong has been devoted to education.He has not only made remarkable achievements in translating from and into Chinese,English,French and other languages,but has also developed his own unique concept of translation.Since 1950,he has always adhered to the“Three Beauties Theory”,believing that translation should not only rely on the original text,but also realize the“beauty of meaning”,“beauty of sound”,and“beauty of form”.Based on Xu Yuanchong’s“Three Beauties Theory”,this paper takes Zheng Zhenduo’s and Feng Tang’s Chinese translations of Stray Birds as an example to explore in depth the specifics of poetry translation theory.The study summarizes the similarities and differences between these two translations in embodying the“three beauties”,providing insights into the Chinese translation techniques of philosophical prose poems.This endeavor seeks to offer valuable insights for the comparative study of Stray Birds translations。
文摘In this editorial,an Associate Editor-in-Chief of the Journal of Palaeogeography(JoP)reminisces his publication experience in JoP during the period 2014-2024.1)During a period of nine years,he contributed eight review articles,three discussions,two replies,one book review,one glossary,and one tribute to the first Editor-in-Chief Prof.Zeng-Zhao Feng.His contributions totaled 534 printed pages.2)His contributions examined 19 different domains,such as landslides,submarine fans,seismites,SSDS,hyperpycnites,rivers,etc.3)His contributions coincided with the formative years of JoP.4)The impact of his articles is evident from the Stats published by ResearchGate.For example,his review article“The Landslide Problem”has reached11,611 Reads and 186 Citations after nine years of publication in 2015.5)In 2023,the CNKI(China National Knowledge Infrastructure)recognized his article“Submarine fans:a critical retrospective(1950-2015)”as the Top-1%most-highly cited publications in the Journal of Palaeogeography published during a 10-year survey period:2012-2022.6)He was inducted as a Founding Member of the International Society of Palaeogeography(ISP)at Changping District of China University of Petroleum(Beijing),Beijing on July 16,2022.7)His JoP editorship during the past 10 years has been the most challenging,inspiring,and rewarding experience of his global scientific journey spanning over six decades(1962-2024).
文摘In 2005 China carried out a new geodetic campaign for the height determination of Qo- molangma Feng——Mt. Everest (QF in short). The technical progresses in geodesy for the 2005 campaign are presented in the paper. GPS positioning was the key technique in the campaign. After summarizing the experiences and lessons of the GPS positioning on the QF summit in the previous QF height determination campaigns, some measures were taken to raise the accuracy and reliability of the height determination with GPS techniques. In order to raise the accuracy of the height deter- mination of the QF summit with classical geodetic techniques, laser ranging was used together with the trigonometric levelling in the 2005 campaign. It is the first time in China the thickness of the ice-snow layer on the QF summit was measured by ground penetrating radar integrated with GPS. The local gravity field and geoid in the QF area was improved on the basis of earth gravity field model integrated with new ground gravity data, DTM data and GPS leveling data in the QF area. In the 2005 campaign the normal height and orthometric height (height above sea level) of the snow surface of the QF summit were obtained as 8846.67 m and 8847.93 m respectively. The orthometric height of the rock surface of the QF summit is 8844.43 m,and the thickness of the ice-snow layer on the QF summit is 3.50 m.
