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| 1 | The vegetation and climate change during Neocene and Early Quaternary in Jiuxi Basin, China显示文摘Sporopollen record in the Laojunmiao Section at Yumen in the Hexi Corridor foreland depression at the northern margin of the Tibetan Plateau revealed that during the period of 13.0―11.15 Ma the ecological environment of the Jiuxi Basin is characterized by steppe vegetation and a semi-moist climate. During 11.16―8.60 Ma prevailed forests of cypress and a still warmer, moister climate; steppe vegetation and dry climate began probably at about 8.6 Ma. Although aridification had been relaxed time and again during 8.40―6.93 Ma (forest-steppe, warm-semi-moist), 6.64―5.67 Ma (open-forest and steppe, warmer-semi-moist) and 5.42―4.96 Ma (steppe, semi-arid), the climate in the region became drier and drier in response to the fre- quent occurrence of aridity during 6.93―6.64 Ma (steppe, semi-arid), 5.67―5.42 Ma (de- sert-steppe, arid), 3.66―3.30 Ma (desert-steppe, arid) and 2.56―2.21 Ma (desert, arid). Perhaps the important findings of our study are the notable expansion of drought-enduring plants during 3.66―3.30 Ma and about 2.56 Ma and the replacement of vegetation by vast arid desert. | MA Yuzhen 1 , FANG Xiaomin 1,2 , LI Jijun 1 , WU Fuli 1 & ZHANG Jun 1 1. Key Laboratory of Western China’s Environmental Systems and College of Resources and Environment, Lanzhou University, Lanzhou 730000, China 2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China | 2005 | Science China Earth Sciences2005，48，5： | 31 |
| 2 | Extraction and purification of TGFβ and its effect on the induction of apoptosis of hepatocytes显示文摘AIM To extract and purify the transforming growth factor β (TGF β), and to demonstrate its biological activity in vivo and induction of apoptosis of hepatocytes in vitro.METHODS TGF β was isolated from fresh bovine platelets by acid/ethanol extraction method and purified with ion exchange and gel chromatography. The extracted TGF β was injected subcutaneously to mice, and its biological activity in vivo was observed 72 hfs post-injection by HE staining. The morphological changes were observed by HE staining and the occurrence of apoptosis was detected by TUNEL method after the human normal hepatic cell line QZG was treated with 8 μg@L 1 TGFβ for 12 hrs in vitro.RESULTS The molecular mass 25 ku TGF β protein was successfully extracted. It was able to induce localized granulation tissue formation in vivo. TGF β-treated hepatocytes showed obvious apoptotic morphological changes, including the pyknosis and dense-stained nuclei and cytoplasm, the fragmentary, annular or crescent nuclei, and the 'bubbling' cytoplasm. Moreover, its apoptotic rate was significantly higher than that of the control group (P<0.05).CONCLUSION Biological active TGF β protein is extracted and purified successfully from bovine platelets, and it is able to induce the apoptosis of hepatocytes. | Xiao-Hui Si Lian-Jun Yang Research Institute of Stomatology,the Ninth People’s Hospital,Shanghai Second Medical University,Shanghai 200011,ChinaDepartment of Pathology,Fourth Military Medical University,Xi’an 710033,Shaanxi Province,China | 2001 | World Journal of Gastroenterology2001，7，4： | 15 |
| 3 | Symmetric-key cryptosystem with DNA technology显示文摘DNA cryptography is a new field which has emerged with progress in the research of DNA computing. In our study, a symmetric-key cryptosystem was designed by applying a modern DNA biotechnology, microarray, into cryptographic technologies. This is referred to as DNA symmetric-key cryptosystem (DNASC). In DNASC, both encryption and decryption keys are formed by DNA probes, while its ciphertext is embedded in a specially designed DNA chip (microarray). The security of this system is mainly rooted in difficult biology processes and problems, rather than conventional computing technology, thus it is unaffected by changes from the attack of the coming quantum computer. The encryption process is a fabrication of a specially designed DNA chip and the decryption process is the DNA hybridization. In DNASC, billions of DNA probes are hybridized and identified at the same time, thus the decryption process is conducted in a massive, parallel way. The great potential in vast parallelism computation and the extraordinary information density of DNA are displayed in DNASC to some degree. | LU MingXin1,2*, LAI XueJia3*, XIAO GuoZhen4,2 & QIN Lei5 1 Department of Information Management, Nanjing University, Nanjing 210093, China 2 State Key Lab of Information Security, Institute of Software of Chinese Academy of Science, Beijing 100049, China 3 Department of Computer Science & Engineer, Shanghai Jiao Tong University, Shanghai 200030, China 4 State Key Lab of ISN, Xidian University, Xi’an 710071, China 5 Cancer Research Institute, Queen’s University, Kingston, Ontario, K7L3N6, Canada | 2007 | Science in China(Series F)2007，50，3： | 14 |
| 4 | China Patient-centered Evaluative Assessment of Cardiac Events Prospective Study of Acute Myocardial Infarction: Study Design显示文摘 | Rachel P Dreyer Xi Li Xue Du Nicholas S Downing Li Li Hai-Bo Zhang Fang Feng Wen-Chi Guan Xiao Xu Shu-Xia Li Zhen-Qiu Lin Frederick A Masoudi John A Spertus Harlan M Krumholz Li-Xin Jiang | 2016 | Chinese Medical Journal2016，，1： | 13 |
| 5 | Plasma endothelin in patients with endotoxemia and dynamic comparison between vasoconstrictor and vasodilator in cirrhotic patients显示文摘INTRODUCTIONPortal hypertension is a common clinical syndromecharacterized by an abnormal increase in portalblood to the systemic circulation, bypassing theliver. Recent studies have reported that humoralsubstances play an important role in thepathogenesis of portal hypertension, either byincreasing vascular resistance at both theintrahepatic and porto-collateral sites or affectingsplanchnic vasodilation with a concomitant increasein parto-collateral blood flow[1-6] | Feng Liu1 Ji Xin Li2, Chun Mei Li2 Xi Sheng Leng2 1Department of General Surgery, the Fifth Affiliated Hospital, Harbin Medical University, Harbin 150036, Heilongjiang Province, China2Department of General Surgery, People’s Hospital, Medical University, Beijing 100044, China | 2001 | World Journal of Gastroenterology2001，7，1： | 8 |
| 6 | Admission Glucose and In-hospital Mortality after Acute Myocardial Infarction in Patients with or without Diabetes: A Cross-sectional Study显示文摘 | Shi Zhao Karthik Murugiah Na Li Xi Li Zi-Hui Xu Jing Li Chen Cheng Hong Mao Nicholas S Downing Harlan M Krumholz Li-Xin Jiang | 2017 | Chinese Medical Journal2017，，7： | 6 |
| 7 | RADIAL GROWTH OF HUASHAN PINE AND ITS RESPONSE TO CLIMATE显示文摘Huashan pine (Finus armandii Franch) is a poential species for dendroclimatic study. Ring-width cores were sampled for four stands of two sites from the eastern extreme of the Qinling Mountains. The ring-width chronologies developed in this study cover a maximum Period from A.D. 1359 t0 1992 and show high common chronology variance over the common period 1911-1960.All the chronologies are significantly correlated with all others, and the degree of correlation appears related to tree age. Response function analyses reveal that from 41 to 75 Percent of chronology variance can be accounted for by monthly mean air temperature and monthly total precipitation. A sufficiently strong correlation of ringwidth index with May and June rainfall and June temperature exists, implying soil moisture to be a limiting factor for Huashan pine growth. The association displayed by response diagrams between narrow rings, low precipitation, and high temperature during spring and early summer indicates a promising potential of ring widths for reconstruction of spring drought for the study area. | Shao Xuemei, Wu Xiangding(Institute of Geography, CAS, Beijing 100101 People’s Republic of China)Xi’an Laboratory of Loess and Quaternary Geology, CAS,xi’an 710061 People’s Republic of China) | 1994 | Journal of Geographical Sciences1994，4，Z2： | 5 |
| 8 | Development of a script of phonemically balanced monosyllable lists of Mandarin-Chinese显示文摘Objectives To develop a set of monosyllable audiometry test material that can be used in speech recognition testing in Mandarin Chinese. Materials and Methods In an effort to improve reliability and efficiency in clinical practice, a set of 30 test lists of 25 monosyllable test items each was designed with consideration of the following: length of the list, phonemical balance (PB), word utility frequency, coverage of common words, and equivalency among lists. The 30 lists contained 750 monosyllabic words and were constructed on the basis of Chinese phoneme distribution probability summarized in the Manual of Acoustic. The occurrence incidence of the 22 consonants, 36 vowels, and 4 tones of the Chinese Mandarin characters in the 30 test lists were calculated. To achieve PB, 489 monosyllables were selected from the 2500 most commonly used Chinese characters and the 4000 most commonly used Chinese phrases to compile the 30 monosyllable test lists using a computer algorithm with manual adjustment. Results Thirty phonemical balanced word lists of common Mandarin Chinese monosyllabic words were compiled. Each list consisted of 25 monosyllables. A total of 489 phonemes (consonants, vowels and tones) were included in the set. Conclusions This set of lists can potentially be used as the basic lists for future development of Mandarin PB monosyllable speech test materials. | JI Fei, CHEN Aiting, ZHAO Yang, XI Xin, HAN Dongyi Departments of Otorhinolaryngology-Head and Neck Surgery, Institute of Otorhinolaryngology, General Hospital of People’s Liberation Army, Beijing 100853, China | 2010 | Journal of Otology2010，5，1： | 4 |
| 9 | Short-segment Barrett's esophagus and cardia intestinal metaplasia:A comparative analysis显示文摘AIM:To investigate the endoscopy and histology of short-segment Barrett's esophagus (SSBE) and cardia intestinal metaplasia (CIM),and their correlation with Helicobacter pylori (H. pylori) gastritis and gastroesophageal reflux disease (GERD). METHODS:Biopsy specimens were taken from 32 SSBE patients and 41 CIM patients with normal appearance of the esophagogastric junction. Eight biopsy specimens from the lower esophagus,cardia,and gastric antrum were stained with hematoxylin/eosin,Alcian blue/periodic acid-Schiff,Alcian blue/high iron diamine and Gimenez dye. Results were graded independently by one pathologist. RESULTS:The SSBE patients were younger than the CIM patients (P < 0.01). The incidence of dysplasia and incomplete intestinal metaplasia subtype was higher in SSBE patients than in CIM patients (P < 0.01). H. pylori infection was correlated with antral intestinal metaplasia (P < 0.05),but not with reflux symptomatic,endoscopic,or histological markers of GERD in CIM patients. SSBE was correlated with reflux symptomatic and endoscopic esophagitis (P < 0.01),but not with H. pylori infection and antral intestinal metaplasia. CONCLUSION:Dysplasia risk is significantly greater in SSBE patients than in CIM patients. CIM is a manifestation of H. pylori-associated and multifocal atrophic gastritis,whereas SSBE may result from GERD. | Ying Chang,Digestive Endoscopic Center,Shanghai Sixth Hospital,Shanghai Jiao Tong University,Shanghai 200233,China Bin Liu,Department of Emergence Surgery,Shaanxi Provincial People’s Hospital,Xi’an 710068,Shaanxi Province,China Gui-Sheng Liu,Department of Gastroenterology,Shaanxi Provincial People’s Hospital,Xi’an 710068,Shaanxi Province,China Tao Wang,Department of Gastroenterology,First Hospital of Xi’ an Jiaotong University,Xi’an 710061,Shaanxi Province,China Jun Gong,Department of Gastroenterology,Second Hospital of Xi’an Jiaotong University,Xi’an 710004,Shaanxi Province,China | 2010 | World Journal of Gastroenterology2010，16，48： | 3 |
| 10 | MicroRNA-31 functions as an oncogenic microRNA in mouse and human lung cancer cells by repressing specific tumor suppressors显示文摘 | Liu Xi Sempere Lorenzo F Ouyang Haoxu Memoli Vincent A Andrew Angeline S Luo Yue Demidenko Eugene Korc Murray Shi Wei Preis Meir Dragnev Konstantin H Li Hua DiRenzo James Bak Mads Freemantle Sarah J Kauppinen Sakari Dmitrovsky Ethan | 2010 | Journal of Clinical Investigation2010，，4： | 3 |
| 11 | Nonlinear dynamics of self-oscillating polymer gels显示文摘Self-oscillating polymer gels driven by Belousov-Zhabotinsky (BZ) chemical reaction are a new class of functional gels that have a wide range of potential applications (e.g., autonomously functioning membranes, actuate artificial muscles). However, the precise control of these gels has been an issue due to limited investigations of the influences of key system parameters on the characteristics of BZ gels. To address this deficiency, we studied the self-oscillating behavior of BZ gels using the nonline-ar dynamics theory and an Oregonator-like model, with focus placed upon the influences of various system parameters. The analysis of the oscillation phase indicated that the dynamic response of BZ gels represents the classical limit cycle oscillation. We then investigated the characteristics of the limit cycle oscillation and quantified the influences of key parameters (i.e., ini-tial reactant concentration, oxidation and reduction rate of catalyst, and response coefficient) on the self-oscillating behavior of BZ gels. The results demonstrated that sustained limit cycle oscillation of BZ gels can be achieved only when these key pa-rameters meet certain requirements, and that the pattern, period and amplitude of the oscillation are significantly influenced by these parameters. The results obtained in this study could enable the controlled self-oscillation of BZ gels system. This has several potential applications such as controlled drug delivery, miniature peristaltic pumps and microactuators. | WANG PengFei1, ZHOU JinXiong1, LI MeiE2, XU Feng1,3 & LU TianJian1 1 Biomedical Engineering and Biomechanics Center, SV Laboratory, Xi’an Jiaotong University, Xi’an 710049, China 2 School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China 3 HST Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, 510660, USA | 2010 | Science China(Technological Sciences)2010，53，7： | 3 |
| 12 | Effects of Panax notoginseng saponins on hydrogen peroxide-induced apoptosis in cultured rabbit bone marrow stromal cells显示文摘Objective To investigate the effects of Panax notoginseng saponins(PNS)on hydrogen peroxide(H2O2)-induced apoptosis in cultured rabbit bone marrow stromal cells(BMSCs).Methods BMSCs from 3-month-old New Zealand rabbits were isolated and cultured by the density gradient centrifugation combined with adherent method.The cultured BMSCs were divided into three groups:normal control,H2O2 treatment(100μmol/L),and PNS pretreatment(0.1g/L).Intracellular reactive oxygen species(ROS)levels as the index of oxidative stress were measured by using 2'7'-dichlorodihydrofluorescein diacetate.Flow cytometry was used to observe the apoptosis of BMSCs by staining with annexinV-FITC/PI.The protein expression of Bax in BMSCs was analyzed by Western blotting.Activity of caspase-3 enzyme was measured by spectrofluorometry.Results Pretreatment with PNS significantly decreased intracellular ROS level induced by H2O2(P<0.01).PNS markedly attenuated H2O2-induced apoptosis rate from 38.68% to 19.24%(P<0.01).PNS reversed H2O2-induced augmentation of Bax expression.Furthermore,PNS markedly reduced the altered in activity of caspase-3 enzyme induced by H2O2(P<0.01).Conclusion PNS has a protective effect on hydrogen peroxide-induced apoptosis in cultured rabbit BMSCs by scavenging ROS and decreasing Bax expression and caspase-3 activity. | Hui Qiang1,2,Guang-Sheng Wang3,Chen Zhang1,Zhi-Bin Shi1,Li-Hong Fan1,Kun-Zheng Wang1 1.Department of Orthopedics,the Second Affiliated Hospital,Medical School of Xi’an Jiaotong University,Xi’an 710004 2.Department of Orthopedics,Shaanxi Province People’s Hospital,Xi’an 710068 3.Department of Orthopedics,Huashan Hospital,Baoji 721000,China. | 2010 | Journal of Pharmaceutical Analysis2010，22，1： | 3 |
| 13 | Monitoring Greenhouses Gases over China Using Space-Based Observations Monitoring Greenhouses Gases over China Using Space-Based Observations显示文摘The atmospheric carbon dioxide(CO 2)concentration has increased to more than 405 parts per million(ppm.1 ppm=10-6 m/s 2)in 2017 due to human activities such as deforestation,land-use change and burning of fossil fuels.Although there is broad scientific consensus on the damaging consequences of the change in climate associated with increasing concentrations of greenhouse gases,fossil CO 2 emissions have continued to increase in recent years mainly from rapidly developing economies and China is now the largest emitter of CO 2 generating about 30%of all emissions globally.To allow more reliable forecast of the future state of the carbon cycle and to support the efforts for mitigation greenhouse gas emissions,a better understanding of the global and regional carbon budget is needed.Space-based measurements of CO 2 can provide the necessary observations with dense coverage and sampling to provide improved constrains on of carbon fluxes and emissions.The Chinese Global Carbon Dioxide Monitoring Scientific Experimental Satellite(TanSat)was established by the National High Technology Research and Development Program of China with the main objective of monitoring atmospheric CO 2 and CO 2 fluxes at the regional and global scale.TanSat has been successfully launched in December 2016 and as part of the Dragon programme of ESA and the Ministry of Science and Technology(MOST),a team of researchers from Europe(UK and Finland)and China has evaluated early TanSat data and contrast it against data from the GOSAT mission and models.In this manuscript,we report on retrieval intercomparisons of TanSat data using two different retrieval algorithms,on validation efforts for the Eastern Asia region using GOSAT CO 2 data and first assessments of TanSat and GOSAT CO 2 data against model calculations using the GEOS-Chem model. | Hartmut BOESCH Yi LIU Paul I PALMER Johanna TAMMINEN Jasdeep S ANAND Zhaonan CAI Ke CHE Huilin CHEN Xi CHEN Liang FENG Janne HAKKARAINEN Pauli HEIKKINEN Nikoleta KALAITZI Rigel KIVI Robert PARKER Peter SOMKUTI Jing WANG Alex WEBB Dongxu YANG Lu YAO You YI | 2020 | Journal of Geodesy and Geoinformation Science2020，3，4： | 2 |
| 14 | Thermal oxide synthesis and characterization of Fe_3O_4 nanorods and Fe_2O_3 nanowires显示文摘Fe3O4 nanorods and Fe2O3 nanowires have been synthesized through a simple thermal oxide reaction of Fe with C2H2O4 solution at 200-600℃ for 1 h in the air. The morphology and structure of Fe3O4 nanorods and Fe2O3 nanowires were detected with powder X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The influence of temperature on the morphology development was experimentally investigated. The results show that the polycrystals Fe3O4 nanorods with cubic structure and the average diameter of 0.5-0.8 μm grow after reaction at 200-500℃ for 1 h in the air. When the temperature was 600℃, the samples completely became Fe2O3 nanowires with hexagonal structure. It was found that C2H2O4 molecules had a significant effect on the formation of Fe3O4 nanorods. A possible mechanism was also proposed to account for the growth of these Fe3O4 nanorods. | JIAO Hua1,2 & YANG HeQing1 1 Key Laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry and Materials Science, Shaanxi Normal University, Xi’an 710062, China 2 Department of Chemistry and Chemical Engineering, Weinan Teacher’s University, Weinan 714000, China | 2009 | Science China Chemistry2009，52，5： | 2 |
| 15 | 经导管动脉栓塞术治疗肝癌:最新临床证据显示文摘对不能接受根治性治疗如肝移植、肿瘤切除术或经皮射频消融术(radiofrequency ablation,RFA)的肝细胞肝癌(hepatocellular carcinoma,HCC)患者,经导管动脉化疗栓塞术(transarterial chemoembolization,TACE)或放疗栓塞术(transarterial radioembolization,TARE)是治疗的核心手段。近期研究证据显示:对于无血管侵犯、3 cm及以下单结节型HCC患者,TACE与肿瘤切除术及RFA后的5年总生存率相似。尽管已应用数十年,碘油(超液化碘油®,Lipiodol®Ultra Fluid,Guerbet,France)作为一种亲肿瘤性且不透射线的药物运输载体在肿瘤介入治疗中的地位依然重要。药物缓释微球(drug-eluting bead,DEB)是栓塞术中一种较新型的药物输送方式,既可维持药物浓度,也可持续释放抗癌药。现有三种DEB可供临床选择使用,即Tandem®(Celo Nova Biosciences Inc.),DC-Beads®(BTG,UK)和Hepa Sphere®(Bio Sphere Medical,Inc.,USA)。经动脉TARE已被证实可安全有效地运用于晚期肝癌及有肝血管侵犯的患者。两种放射性栓塞微粒可供临床选择使用,即SIR-Spheres®(Sirtex Medical Limited,Australia)和Thera Sphere®(BTG,UK)。本文总结肝癌经导管动脉治疗的关键临床试验。 | Yì-Xiáng J.Wáng Thierry De Baere Jean-Marc Idée Sébastien Ballet 邓敏 王毅翔 | 2015 | 临床与病理杂志2015，35，7： | 2 |
| 16 | Adaptive output-feedback tracking of stochastic nonlinear systems显示文摘 | Ji H B Xi H S | 2006 | IEEE Transactions on Automatic Control2006，51，2： | 1 |
| 17 | Desorption of copper and cadmium from soils enhanced by organic acids显示文摘 | Yuan S H Xi Z M Jiang Y | 2007 | Chemosphere2007，68，： | 1 |
| 18 | Desorption of copper and cadmium from soils enhanced by organic acids 显示文摘 | Yuan S H Xi Z M Jiang Y | 2007 | Chemosphere2007，，68： | 1 |
| 19 | Mitogen activated protein kinase (MAPK) pathway regulates heme oxygenase-1 gene expression by hypoxia in vascular cells显示文摘 | Ryter SW Xi S Hartsfield CL | 2002 | Antioxid Redox Signal2002，4，4： | 1 |
| 20 | Hidden semi-Markov model for anomaly detection显示文摘 | Tan X B Xi H S | 2008 | Applied Mathematics and Computation2008，205，2： | 1 |
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