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| 1 | 内皮细胞和平滑肌细胞氧化应激时Nrf2/ARE信号通路对抗氧化基因表达的调控:与动脉粥样硬化和先兆子痫的关系显示文摘动脉粥样硬化、糖尿病、慢性肾功能衰竭和先兆子痫等血管疾病时活性氧(reactive oxygen species,ROS)生成增加,容易导致内皮依赖性血管舒张功能的损害和血管损伤,而细胞可以诱导多种编码Ⅱ相解毒酶和抗氧化蛋白的基因表达,从而减轻ROS和亲电子物质介导的细胞损伤。一个被称为抗氧化反应元件(antioxidant response element,ARE)或亲电子反应元件(electrophile response element,EpRE)的顺式转录调控元件,可以介导诸如亚铁血红素加氧酶1、γ-谷氨酰半胱氨酸合成酶、硫氧还蛋白还原酶、谷胱甘肽-S转移酶和NAD(P)H:苯醌氧化还原酶等基因的转录。其他抗氧化酶,如超氧化物歧化酶、过氧化氢酶和非酶清除剂(如谷胱甘肽)等也参与ROS的清除。转录因子NF-E2相关因子2(nuclear factor-erythroid 2-related factor 2, Nrf2)是属于Cap‘n’Collar家族的转录因子,具有碱性亮氨酸拉链(basic region-leucine zipper,bZIP),它在ARE介导的抗氧化基因表达中起重要的作用。在正常情况下,Kelch样环氧氯丙烷相关蛋白-1(Kelch-like ECH-associated protein-1,Keapl)与Nrf2耦联,并与肌动蛋白细胞骨架结合被锚定于胞浆,但是在半胱氨酸残基发生氧化的情况下,Nrf2和Keapl解耦联,进入细胞核并与ARE结合,从而激活多种抗氧化基因和Ⅱ相解毒酶基因的转录。蛋白激酶C、丝裂原活化蛋白激酶和磷脂酰肌醇-3激酶参与Nrf2/ARE信号转导的调控。本文综述了有关Nrf2/ARE信号转导通路在血管稳态和动脉硬化、先兆子痫等疾病情况下内皮及平滑肌细胞对抗持续性氧化应激中起的作用。 | Giovanni E. Mann Jorg Niehueser-Saran Alan Watson Ling Gao Tetsuro Ishii Patricia de Winter Richard C. M. Siow | 2007 | 生理学报2007，59，2： | 35 |
| 2 | Hepatocellular carcinoma redirects to ketolysis for progression under nutrition deprivation stress显示文摘癌症房间以他们的能力著名给新陈代谢的小径换新电线在各种各样的压力条件下面支持幸存和增长。尽管在肝生产了,酉同类身体没在正常的成年的肝房间被消费。我们这里发现酉同类分解代谢或 ketolysis 在 hepatocellular 被重新激活在营养剥夺条件下面的癌(HCC ) 房间。机械学地, 3-oxoacid CoA-transferase 1 (OXCT1 ) ,其表情在正常的成年的肝纸巾被压制的限制率的 ketolytic 酶,被浆液重新导致被触发饥饿的 mTORC2-AKT-SP1 在 HCC 房间发信号。而且,我们观察到在 HCC 的那提高的 ketolysis 为 AMPK 激活的压抑是批评的并且保护 HCC 房间免受过多的 autophagy 的伤害,从而提高肿瘤生长。重要地,临床的 HCC 样品的分析表明那增加的 OXCT1 表情预言更高耐心的死亡。一起拿,我们这里揭开剥夺营养的 HCC 房间为精力由采用酉同类身体的新奇新陈代谢的改编供应和癌症前进。 | De Huang Tingting Li Lin Wang Long Zhang Ronghui Yan Kui Li Songge Xing Gongwei Wu Lan Hu Weidong Jia Sheng-Cai Lin Chi V Dang Libing Song Ping Gao Huafeng Zhang | 2016 | Cell Research2016，26，10： | 27 |
| 3 | Intraoperative endoscopic sphincterotomy for common bile duct stones during laparoscopic cholecystectomy显示文摘INTRODUCTION The advent of laparoscopic cholecystectomy(LC)inthe late 1980s gained widespread acceptance withina short period of time and has become the preferredtreatment for symptomatic gallstones,but themanagement of coexisting gallbladder and commonbile duct(CBD)stones has remained controversialbecause the various strategies proposed have theirlimitations.In fact,choledocholithiasis | De Fei Hong Ming Gao Urs Bryner Xiu Jun Cai Yi Ping Mou | 2000 | World Journal of Gastroenterology2000，6，3： | 19 |
| 4 | Detection of hepatitis C virus NS5 protein and genome in Chinese carcinoma of the extrahepatic bile duct and its significance显示文摘AIM To investigate the hepatitis C virus(HCV)infection in the tissues of carcinoma ofextrahepatic bile duct and study theircorrelation.METHODS HCV NS5 protein and HCV RNA weredetected by labeled streptavidin biotin(LSAB)method and in situ reverse transcriptionpolymerase chain reaction(IS-RT-PCR)insections of 51 cases of carcinoma ofextrahepatic bile duct and 34 cases of controlgroup(without malignant biliary disease).RESULTS In 51 cases of carcinoma ofextrahepatic bile duct,HCV NS5 protein wasdetected in 14(27.5%),which was clearlystained in the cytoplasm of cancer cell but not inthe nucleus or cell membrane.HCV RNA wasdetected in 18(35.4%),which was located inthe nucleus of cancer cell in 12 cases and in thecytoplasm in 6 cases.HCV NS5 protein and RNAcoexistence was found in 2 cases.In 34 cases ofcontrol group,HCV RNA was detected in 2(5.9%).HCV NS5 protein and RNA positive cellswere found either scattered or in clusters.CONCLUSION The prevalence of hepatitis C viral infection in the tissues of carcinoma ofextrahepatic bile duct was significantly higherthan in control group(X^2=9.808,P=0.002).The findings suggest a correlation between HCVinfection and carcinoma of extrahepatic bileduct,which is different from the traditionalviewpoint.HCV infection might be involved inthe development of carcinoma of extrahepaticbile duct. | Ming Yi Chen Zhi Qiang Huang Le Zhen Chen Ya Bing Gao Rui Yun Peng De Wen Wang | 2000 | World Journal of Gastroenterology2000，6，6： | 19 |
| 5 | Effect of lipid on proliferation and activation of rat hepatic stellate cells(Ⅰ)显示文摘INTRODUCTIONDespitetheearlycontroversyovertheprimarycelularsourceofextracelularmatrixproteinsinliverfibrosis,compelinginvitro... | LU Lun Gen, ZENG Min De, LI Ji Qiang, HUA Jing, FAN Jian Gao, FAN Zhu Ping and QIU De Kai | 1998 | World Journal of Gastroenterology1998，4，6： | 18 |
| 6 | Effect of endotoxin on fibronectin synthesis of rat primary cultured hepatocytes显示文摘EfectofendotoxinonfibronectinsynthesisofratprimaryculturedhepatocytesJIAJinBin,HANDeWu,XURuiLing,GAOFei,ZHAOLongFeng,ZHA... | JIA JinBin, HAN DeWu, XU RuiLing, GAO Fei, ZHAO LongFeng, ZHAO YuanChang, YAN JinPin and MA XueHuiKeywords liver cirrhosis endotoxins fibronectin/analysis liver/cytology cells, cultured lipopolysaccharide | 1998 | World Journal of Gastroenterology1998，4，4： | 14 |
| 7 | The enhanced X-ray Timing and Polarimetry mission—eXTP显示文摘In this paper we present the enhanced X-ray Timing and Polarimetry mission—eXTP. eXTP is a space science mission designed to study fundamental physics under extreme conditions of density, gravity and magnetism. The mission aims at determining the equation of state of matter at supra-nuclear density, measuring effects of QED, and understanding the dynamics of matter in strong-field gravity. In addition to investigating fundamental physics, eXTP will be a very powerful observatory for astrophysics that will provide observations of unprecedented quality on a variety of galactic and extragalactic objects. In particular, its wide field monitoring capabilities will be highly instrumental to detect the electro-magnetic counterparts of gravitational wave sources.The paper provides a detailed description of:(1) the technological and technical aspects, and the expected performance of the instruments of the scientific payload;(2) the elements and functions of the mission, from the spacecraft to the ground segment. | ShuangNan Zhang Andrea Santangelo Marco Feroci YuPeng Xu FangJun Lu Yong Chen Hua Feng Shu Zhang Sφren Brandt Margarita Hernanz Luca Baldini Enrico Bozzo Riccardo Campana Alessandra De Rosa YongWei Dong Yuri Evangelista Vladimir Karas Norbert Meidinger Aline Meuris Kirpal Nandra Teng Pan Giovanni Pareschi Piotr Orleanski QiuShi Huang Stephane Schanne Giorgia Sironi Daniele Spiga Jiri Svoboda Gianpiero Tagliaferri Christoph Tenzer Andrea Vacchi Silvia Zane Dave Walton ZhanShan Wang Berend Winter Xin Wu Jean J.M.in't Zand Mahdi Ahangarianabhari Giovanni Ambrosi Filippo Ambrosino Marco Barbera Stefano Basso Jörg Bayer Ronaldo Bellazzini Pierluigi Bellutti Bruna Bertucci Giuseppe Bertuccio Giacomo Borghi XueLei Cao Franck Cadoux Francesco Ceraudo TianXiang Chen Yu Peng Chen Jerome Chevenez Marta Civitani Wei Cui WeiWei Cui Thomas Dauser Ettore Del Monte Sergio Di Cosimo Sebastian Diebold Victor Doroshenko Michal Dovciak YuanYuan Du Lorenzo Ducci QingMei Fan Yannick Favre Fabio Fuschino JoséLuis Ga'lvez Min Gao MingYu Ge Olivier Gevin Marco Grassi QuanYing Gu YuDong Gu DaWei Han Bin Hong Wei Hu Long Ji ShuMei Jia WeiChun Jiang Thomas Kennedy Ingo Kreykenbohm Irfan Kuvvetli Claudio Labanti Luca Latronico Gang Li MaoShun Li Xian Li Wei Li ZhengWei Li Olivier Limousin HongWei Liu XiaoJing Liu Bo Lu Tao Luo Daniele Macera Piero Malcovati Adrian Martindale Malgorzata Michalska Bin Meng Massimo Minuti Alfredo Morbidini Fabio Muleri Stephane Paltani Emanuele Perinati Antonino Picciotto Claudio Piemonte JinLu Qu Alexandre Rachevski Irina Rashevskaya Jerome Rodriguez Thomas Schanz ZhengXiang Shen LiZhi Sheng JiangBo Song LiMing Song Carmelo Sgro Liang Sun Ying Tan Phil Uttley Bo Wang DianLong Wang GuoFeng Wang Juan Wang LangPing Wang YuSa Wang Anna L.Watts XiangYang Wen Jörn Wilms ShaoLin Xiong JiaWei Yang Sheng Yang YanJi Yang Nian Yu WenDa Zhang Gianluigi Zampa Nicola Zampa Andrzej A.Zdziarski AiMei Zhang ChengMo Zhang Fan Zhang Long Zhang Tong Zhang Yi Zhang XiaoLi Zhang ZiLiang Zhang BaoSheng Zhao ShiJie Zheng Yu Peng Zhou Nicola Zorzi J.Frans Zwart | 2019 | Science China(Physics,Mechanics & Astronomy)2019，62，2： | 11 |
| 8 | Role of free fatty acids in proliferation of rat hepatic stellate cells(Ⅱ)显示文摘INTRODUCTIONAlthoughtheroleofhepatocytesinfatyacidsmetabolismandtransporthavebeendiscusedintensively,fewofthatofHSCwasreporte... | LU Lun Gen, ZENG Min De, LI Ji Qiang, HUA Jing, FAN Jian Gao and QIU De Kai | 1998 | World Journal of Gastroenterology1998，4，6： | 8 |
| 9 | Direct laser writing of volumetric gradient index lenses and waveguides显示文摘Direct laser writing(DLW)has been shown to render 3D polymeric optical components,including lenses,beam expanders,and mirrors,with submicrometer precision.However,these printed structures are limited to the refractive index and dispersive properties of the photopolymer.Here,we present the subsurface controllable refractive index via beam exposure(SCRIBE)method,a lithographic approach that enables the tuning of the refractive index over a range of greater than 0.3 by performing DLW inside photoresist-filled nanoporous silicon and silica scaffolds.Adjusting the laser exposure during printing enables 3D submicron control of the polymer infilling and thus the refractive index and chromatic dispersion.Combining SCRIBE’s unprecedented index range and 3D writing accuracy has realized the world’s smallest(15μm diameter)spherical Luneburg lens operating at visible wavelengths.SCRIBE’s ability to tune the chromatic dispersion alongside the refractive index was leveraged to render achromatic doublets in a single printing step,eliminating the need for multiple photoresins and writing sequences.SCRIBE also has the potential to form multicomponent optics by cascading optical elements within a scaffold.As a demonstration,stacked focusing structures that generate photonic nanojets were fabricated inside porous silicon.Finally,an all-pass ring resonator was coupled to a subsurface 3D waveguide.The measured quality factor of 4600 at 1550 nm suggests the possibility of compact photonic systems with optical interconnects that traverse multiple planes.SCRIBE is uniquely suited for constructing such photonic integrated circuits due to its ability to integrate multiple optical components,including lenses and waveguides,without additional printed supports. | Christian R.Ocier Corey A.Richards Daniel A.Bacon-Brown Qing Ding Raman Kumar Tanner J.Garcia Jorik van de Groep Jung-Hwan Song Austin J.Cyphersmith Andrew Rhode Andrea N.Perry Alexander J.Littlefield Jinlong Zhu Dajie Xie Haibo Gao Jonah F.Messinger Mark L.Brongersma Kimani C.Toussaint Jr Lynford L.Goddard Paul V.Braun | 2020 | Light(Science & Applications)2020，9，1： | 6 |
| 10 | Overproduction of nitric oxide inhibits vascular reactivity in portal hypertensive rats显示文摘OverproductionofnitricoxideinhibitsvascularreactivityinportalhypertensiveratsLIXiRu,WUJinSheng,HEZeSheng,MAQingJiuandGAO... | LI XiRu, WU JinSheng, HE ZeSheng, MA QingJiu and GAO DeMing | 1997 | World Journal of Gastroenterology1997，3，4： | 5 |
| 11 | An optimized short-term wind power interval prediction method considering NWP accuracy显示文摘In recent years, the accuracy of the wind power prediction has been urgently studied and improved to satisfy the requirements of power system operation. In this paper, the relevance vector machine(RVM)-based models are established to predict the wind power and its interval for a given confidence level. An NWP improvement module is presented considering the characteristic of NWP error. Moreover, two parameter optimization algorithms are applied to further improve the prediction model and to compare each performance. To take three wind farms in China as examples, the performance of two RVM-based models optimized, respectively, by genetic algorithm(GA)and particle swarm optimization(PSO) are compared with predictions based on a genetic algorithm–artificial neural network(GA–ANN) and support vector machine. Results show that the proposed models have better prediction accuracy with GA–RVM model and more efficient calculation with PSO–RVM. | Yongqian Liu Jie Yan Shuang Han Infield David De Tian Linyue Gao | 2014 | Chinese Science Bulletin2014，59，11： | 4 |
| 12 | 感染人类的禽流感病毒A(H5N1)研究进展显示文摘 | Abdel-Nasser Abdel-Ghafar Tawee Chotpitayasunondh Zhancheng Gao Frederick G. Hayden Nguyen Duc Hien Menno D. de Jong Azim Naghdaliyev J.S. Malik Peiris Nahoko Shindo Santoso Soeroso Timothy M. Uyeki 钟晓琴(译) 王关嵩(校) | 2009 | 中华肺部疾病杂志(电子版)2009，2，1： | 4 |
| 13 | Running train induced vibrations and noises of elevated railway structures and their influences on environment显示文摘The vibrations and noises of elevated railway structures have been cause for concern due to their effects on the environment and the people living near elevated lines.In this paper,the main structural features of some new elevated bridges and station hall were introduced.The generation mechanism of vibrations and noise of elevated structures induced by trains were investigated.The noise induced by different types of elevated bridges,their influences on the environment and the theoretical method for the analysis of structure borne noise was analyzed.Finally,several field measurements on train induced noises at the platforms of elevated subway stations and bridges were presented. | He XIA Fei GAO Xuan WU Nan ZHANG Guido DE ROECK Geert DEGRANDE | 2009 | Frontiers of Structural and Civil Engineering2009，3，1： | 4 |
| 14 | Protective Effect of Procyanidin B2 on Acute Liver Injury Induced by Aflatoxin B1 in Rats显示文摘Objective This study aimed to explore the protective effect of procyanidin B2(PCB2)on acute liver injury induced by aflatoxin B1(AFB1)in rats.Methods Forty Sprague Dawley rats were randomly divided into control,AFB1,AFB1+PCB2,and PCB2 groups.The latter two groups were administrated PCB2 intragastrically(30 mg/kg body weight)for 7 d,whereas the control and AFB1 groups were given the same dose of double distilled water intragastrically.On the sixth day of treatment,the AFB1 and AFB1+PCB2 groups were intraperitoneally injected with AFB1(2 mg/kg).The control and PCB2 groups were intraperitoneally administered the same dose of dimethyl sulfoxide(DMSO).On the eighth day,all rats were euthanized:serum and liver tissue were isolated for further examination.Hepatic histological features were assessed by hematoxylin and eosin-stained sections.Weight,organ coefficient(liver,spleen,and kidney),liver function(serum alanine aminotransferase,aspartate aminotransferase,alkaline phosphatase,total bilirubin,and direct bilirubin),oxidative index(catalase,glutathione,superoxide dismutase,malondialdehyde,and 8-hydroxy-2′-deoxyguanosine),inflammation factor[hepatic interleukin-6(IL-6)m RNA expression and serum IL-6],and bcl-2/bax ratio were measured.Results AFB1 significantly caused hepatic histopathological damage,abnormal liver function,oxidative stress,inflammation,and bcl-2/bax ratio reduction compared with DMSO-treated controls.Our results indicate that PCB2 treatment can partially reverse the adverse liver conditions induced by AFB1.Conclusion Our findings indicate that PCB2 exhibits a protective effect on acute liver injury induced by AFB1. | DENG Zhi Jie ZHAO Jing Fang HUANG Feng SUN Gui Li GAO Wei LU Li XIAO De Qiang | 2020 | Biomedical and Environmental Sciences2020，33，4： | 4 |
| 15 | Pollen-Expressed Transcription Factor 2 Encodes a Novel Plant-Specific TFIIB-Related Protein that Is Required for Pollen Germination and Embryogenesis in Arabidopsis显示文摘花粉萌芽和 embryogenesis 对性植物复制重要。这些过程要求很多 genesto 被表示。真核细胞的原子基因的抄写被在 associationwith 扮演一套辅助一般抄写因素(GTF ) 的三保存 RNA 聚合酶完成,包括 B 类型 GTF。在植物 reproductionremain 的 B 类型 GTF 的角色糟糕理解。这里,我们在 Arabidopsis 报导新奇植物特定的 TFIIB 相关的基因 PTF2 的功能的描述。在 PTF2 的变化引起了花粉萌芽的失败。花粉营救表明变化也破坏了 embryogenesis 和 resultedin 种子流产。PTF2 在与活跃房间部门 anddifferentiation 开发花粉和另外的纸巾多产地被表示,包括胚胎并且射击顶端的分裂组织。PTF2 蛋白质分享更低的氨基酸顺序 similaritywith 在 Arabidopsis 的另外的已知的 TFIIB 和 TFIIB 相关的蛋白质。它能与 TATA 盒子绑定蛋白质 2 交往(TBP2 ) 并且作为另外的已知的 TFIIBand TFIIB 相关的蛋白质绑在双 stranded DNA (dsDNA ) 。另外, PTF2 能形成 homodimer 并且与 RNA 聚合酶(RNAP ) 的子单元交往,暗示它可以涉及 RNAP 抄写。这些结果建议 PTF2 在 Arabidopsis 在 pollengermination 和 embryogenesis 起关键作用,可能由通过和 TBP2 和 RNAPs.Key 词的子单元的相互作用调整基因表示: | Qian-Kun Niu Yan Liang Jing-Jing Zhou Xiao-Ying Dou Shu-Chen Gao Li-Qun Chen Xue-Qin Zhang De Ye | 2013 | Molecular Plant2013，6，4： | 3 |
| 16 | Haplotype-resolved genome assembly and allele- specific gene expression in cultivated ginger显示文摘Ginger(Zingiber officinale)is one of the most valued spice plants worldwide;it is prized for its culinary and folk medicinal applications and is therefore of high economic and cultural importance.Here,we present a haplotype-resolved,chromosome-scale assembly for diploid ginger anchored to 11 pseudochromosome pairs with a total length of 3.1 Gb.Remarkable structural variation was identified between haplotypes,and two inversions larger than 15Mb on chromosome 4 may be associated with ginger infertility.We performed a comprehensive,spatiotemporal,genome-wide analysis of allelic expression patterns,revealing that most alleles are coordinately expressed.The alleles that exhibited the largest differences in expression showed closer proximity to transposable elements,greater coding sequence divergence,more relaxed selection pressure,and more transcription factor binding site differences.We also predicted the transcription factors potentially regulating 6-gingerol biosynthesis.Our allele-aware assembly provides a powerful platform for future functional genomics,molecular breeding,and genome editing in ginger. | Shi-Ping Cheng Kai-Hua Jia Hui Liu Ren-Gang Zhang Zhi-Chao Li Shan-Shan Zhou Tian-Le Shi Ai-Chu Ma Cong-Wen Yu Chan Gao Guang-Lei Cao Wei Zhao Shuai Nie Jing-Fang Guo Si-Qian Jiao Xue-Chan Tian Xue-Mei Yan Yu-Tao Bao Quan-Zheng Yun Xin-Zhu Wang Ilga Porth Yousry AEl-Kassaby Xiao-Ru Wang Zhen Li Yves Van de Peer Jian-Feng Mao | 2021 | Horticulture Research2021，8，1： | 3 |
| 17 | Synthesis and anti-TMV activity of novel N-(3-alkyl-1H-pyrazol-4-yl)-3-alkyl-4-substituted-1H-pyrazole-5-carboxamides显示文摘In order to investigate the biological activity of novel bis-pyrazole compounds,a series of N-(3-alkyl-5-(N-methylcarbamyl)- 1H-pyrazol-4-yl)-3-alkyl-4-substituted-1H-pyrazole-5-carboxamides were designed and synthesized with ethyl 3-alkyl-1H-pyrazole -5-carboxylate 1 as starting materials.N-Methyl-3-alkyl-4-amino-1H-pyrazole-5-carboxamides 6 were obtained from 1 via 5 steps.3-Alkyl-4-substitued-1H-pyrazole-5-carboxyl chlorides 4a,4b,11a,11b,11c or 12 were also obtained from 1 via several steps.Target compounds 7a-7g were obtained after the reaction of 6 with the above 1H-pyrazole-5-carboxyl chlorides.Preliminary bioassay showed some compounds possessing good inactivation effect against TMV(tobacco mosaic virus).Compound 7a showed higher activity superior to ningnanmycin at a concentration of 5.0×10^(-4) g/mL and equal activity at 1.0×10^(-4) g/mL;7b and 7c showed equal activity to virazole both at concentrations of 5.0×10^(-4) g/mL and 1.0×10^(-4) g/mL. | Da Qiang Zhang Gao Fei Xu Zhi Jin Fan Dao Quan Wang Xin Ling Yang De Kai Yuan | 2012 | Chinese Chemical Letters2012，23，6： | 3 |
| 18 | Effect of spacer length on the liquid crystalline property of azobenzene-containing ABA-type triblock copolymers via ATRP显示文摘The effect of flexible spacer length on the liquid crystalline property of ABA-type triblock copolymers containing azobenzene groups was investigated.For the study,the monomers,n-[4-(4-ethoxyphenylazo)phenoxy]alkyl methacrylates with varying methylene groups(n=0,2,6)were used to synthesize a series of azobenzene-containing amphiphilic triblock copolymers PAnC-PEG-PAnC by atom transfer radical polymerization(ATRP).Differential scanning calorimetry(DSC),polarizing optical microscopy(POM),and one-dimensional X-ray diffraction(1D WAXD)have shown that the glass transition temperatures of these copolymers decreased with increasing n,PAOC-PEG-PAOC has no mesophase,while both PA2C-PEG-PA2C and PA6C-PEG- PA6C have a nematic mesophase.These differences derive from the length of spacer groups between the polymer backbone and side-chain LC monomers. | Xin De Tang Long Cheng Gao Xing He Fan Qi Feng Zhou | 2007 | Chinese Chemical Letters2007，18，9： | 2 |
| 19 | Huperzine H, a New Lycopodium Alkaloid from Huperzia serrata显示文摘A new lycopodium alkaloid with a novel skeleton was isolated from Huperzia serrata.Its structure was determined on the basis of spectral evidences. | Wen Yun GAO Yi M lug LI Bac De WANG Da Yuan ZHU(State Key Laboratory of New Drug Research. Shanghai Institute of Materia Medica. ChineseAcademy of Sciences, Shanghai 200031) | 1999 | Chinese Chemical Letters1999，10，6： | 2 |
| 20 | Sent2Agri System Based Crop Type Mapping in Yellow River Irrigation Area显示文摘Agricultural monitoring is essential for adequate management of food production and distribution.Crop land and crop type classification,using remote sensing time series,form an important tool to capture the agricultural production information.The recently launched Sentinel-2 satellites provide unprecedented monitoring capacities in terms of spatial resolution,swath width,and revisit frequency.The Sentinel-2 for Agriculture(Sen2-Agri)system has been developed to fully exploit those capacities,by providing four relevant earth observation products for agricultural monitoring.Under the Dragon 4 Program,the crop mapping with various satellite images and a specific focus on the Yellow River irrigated agricultural area in the Ningxia Hui Autonomous Region in China was carried out with the Sentinel-2 for Agriculture system(Sent2Agri).9 types of crops were classified and the crop type map in 2017 was produced based on 35 scenes Sentinel 2A/B images.The overall accuracy computed from the error confusion matrix is 88%,which includes the cropped and uncropped types.After the removal of the uncropped area,the overall accuracy for a cropped decrease to 73%.In order to further improve the crop classification accuracy,the training dataset should be further improved and tuned. | Jinlong FAN Pierre DEFOURNY Qinghan DONG Xiaoyu ZHANG Mathilde De VROEY Nicolas BELLEMANS Qi XU Qiliang LI Lei ZHANG Hao GAO | 2020 | Journal of Geodesy and Geoinformation Science2020，3，4： | 2 |
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