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1Reconstruction of precipitation variation from tree rings in recent 1000 years in Delingha, Qinghai显示文摘Using seven well-replicated Qilian juniper (Sabina przewalskii Kom.) ring-width chronologies developed at Zongwulong and Shalike Mts. in the northeastern part of the Qaidam Basin annual precipitation from previous July to current June in the recent 1000 years was re- constructed for Delingha. The reconstruction can capture 63.1% of precipitation variance and the equation was stable over time. For the reconstructed precipitation, wet periods occurred in AD1520—1633 and 1933—2001, whereas dry intervals in 1429—1519 and 1634—1741. In ad- dition, the magnitude in precipitation variation was lower before 1430 with about 15 mm, but it increased to 30 mm during the period of 1430 to 1850. After 1850, the precipitation variance de- creased again. In contrast to the increase in temperature, a decrease in annual precipitation was evident since the 1990s. The agreement in low-frequency variation between the reconstruction and the glacier accumulation and particulate content in Dunde ice cores during the recent several hundred years suggested that the precipitation reconstructed in this study was rather reliable, and represented a regional signal. This 1000-year reconstruction could benefit our understanding of climatic variation in decadal to century-scale in this region, and provide basic data to climate models and to prediction of future climate in the 21st century.SHAO Xuemei1, HUANG Lei1, LIU Hongbin2, LIANG Eryuan1, FANG Xiuqi3 & WANG Lili1 1. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 2. National Climate Center, Beijing 100081, China 3. Beijing Normal University, Beijing 100875, China 2005Science China Earth Sciences2005,48,7:113
2Recent glacial retreat in High Asia in China and its impact on water resource in Northwest China显示文摘Under the impact of climatic warming, the glaciers in the High Asia in China have been retreating continuously with negative glacial mass balance in recent several decades. The retreat became more intensive in the past 10 years. The spatial pattern of the glacial retreat in the High Asia in China is that the smallest magnitude of retreat is in the inland of the Tibetan Plateau, the magnitude increases from the inland to the margin of the Tibetan Plateau, and the largest magnitude at the margin of the Tibetan Plateau. The glacial retreat in the High Asia in China has an important impact on the water resource of the arid regions in Northwest China. This study shows that the glacial retreat in the 1990s has caused an increase of 5.5% in river runoff in Northwest China. In the Tarim River basin, the increase of river runoff is higher than 5.5%.YAO Tandong 1,2 ,WANG Youqing 2 ,LIU Shiying 2,1 ,PU Jianchen 2,1 ,SHEN Yongping 2 & LU Anxin 2,1 1.Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100029,China 2.Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China 2004Science China Earth Sciences2004,47,12:117
3The land use and land cover change database and its relative studies in China显示文摘In the mid-1990s, we established the national operative dynamic information serving systems on natural resources and environment. During building the land-use/land-cover change (LUCC)database for the mid-1990s, 520 scenes of remotely sensed images of Landsat Thematic Mapper (TM) were interpreted into land-use/land-cover categories at scale of 1:100,000 under overall digital software environment after being geo-referenced and ortho-rectified. The vector map of land-use/land-cover in China at the scale of 1:100,000 was recently converted into a 1-km raster database that captures all ofthe high-resolution land-use information by calculating area percentage for each kind of land use category within every cell. Being designed as an operative dynamic information serving system,monitoring the change in land-use/land-cover at national level was executed. We have completed the updating of LUCC database by comparing the TM data in the mid-1990s with new data sources received during 1999-2000 and 1989-1990. The LUCC database has supported greatly the national LUCC research program in China and some relative studies are incompletely reviewed in this paper.LIU Jiyuan, LIU Mingliang, DENG Xiangzheng, ZhuangDafang,ZHANG Zengxiang, LUO Di(1. Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China 2. Inst. of Remote Sensing Applications, CAS, Beijing 100101, China) 2002Journal of Geographical Sciences2002,12,3:96
4Function of apoptosis and expression of the proteins Bcl-2,p53 and C-myc in the development of gastric cancer显示文摘INTRODUCTIONIn China ,the incidence and mortality of gastric cancer rank the second among all cancers. Recent development of cancer [1-20].The aim of this study was investigat the insight of apoptosis and bcl-2, p53 and C-myc protein expression in the development of gastric cancer .An Gao Xu Shao Guang Li Ji Hong Liu Ai Hua Gan Research Laboratory of Digestive Disease,Huizhou Central People’s Hospital,Huizhou 516001,Guangdong Province,ChinaDr.An Gao Xu graduated from Guangdong Medical College in 1984.He is an associate physician-in-chief,specializing in the research and treatment of gastrointestinal and liver tumors.He has published 24 papers and 1 book. 2001World Journal of Gastroenterology2001,7,3:91
5Quantitative analysis of vascular endothelial growth factor, microvascular density and their clinicopathologic features in human hepatocellular carcinoma显示文摘BACKGROUND: Angiogenesis is known to be essential to the survival, growth, invasion, and metastasis of tumor cells. Vascular endothelial growth factor (VEGF) are an important angiogenic factor regulating tumor angiogenesis, but its significance and tumor pathologic features are un- clear in hepatocellular carcinoma (HCC). In the present study, we analyzed expression of tissue VEGF, alteration of microvascular density (MVD) in microvessel angiogenesis, development and metastasis of HCC, and level of serum VEGF in differential diagnosis of benign and malignant liv- er diseases. METHODS: Tumor specimens were prospectively collected from HCC patients undergoing resection. Total RNAs were extracted and the expression levels were detected from different parts of HCC tissues. The cellular distributions of VEGF and MVD of liver tumors and their paracancerous and distal cancerous tissues were investigated by streptavi- din peroxidase (S-P) immunohistochemistry, respectively. The VEGF levels of circulating blood and hepatoma tissues were measured by enzyme-linked immunosorbent assay. RESULTS: The incidence of VEGF expression was 63.9% in HCCs (23/36 cases), 78.3% in non-encapsulated HCCs (18/23), and 90.9% in HCCs with extrahepatic metastasis (10/11), respectively. The VEGF expression was tightly correlated with MVD (P <0.01). The MVD in HCC with metastasis, low differentiation or non-encapsulation was significantly higher than that in HCC with intact capsule, high differentiation, or no metastasis. No significant diffe- rence was found between VEGF, MVD, tumor size, and hepatitis virus infection. The level of total RNA in HCC tis- sues was significantly lower but the VEGF level significantly higher than those in paracancerous or distal cancerous ones (P<0.01). The abnormal expression levels of VEGF in sera of HCC patients were directly correlated with the me- tastasis and recurrence of tumors. CONCLUSION: The high expression of VEGF and abnor- mality of tissue MVD are useful predictors for vascular inva- sion and metastasis of liver tumors.Deng-Fu Yao, Xin-Hua Wu, Yong Zhu, Gong-Sheng Shi, Zhi-Zhen Dong, Deng-Bing Yao, Wei Wu, Li-Wei Qiu and Xian-Yong Meng Nantong, China Research Center of Clinical Molecular Biology , Department of Pathology and Department of Gastroenterology , Affiliated Hos- pital of Nantong University Department of Diagnostics , and Institute of Neurosciences , Nantong University Nantong 226001, China 2005Hepatobiliary & Pancreatic Diseases International2005,4,2:81
6SHEsis,a powerful software platform for analyses of linkage disequilibrium,haplotype construction,and genetic association at polymorphism loci显示文摘In multiloci-based genetic association studies of complex diseases, a powerful and high efficient tool for analyses oflinkage disequilibrium (LD) between markers, haplotype distributions and many chi-square/p values with a large numberof samples has been sought for long. In order to achieve the goal of obtaining meaningful results directly from raw data,we developed a robust and user-friendly software platform with a series of tools for analysis in association study withhigh efficiency. The platform has been well evaluated by several sets of real data.Yong Yong SHI1,2, Lin HE2,3,*1Bio-X Life Science Research Center, Shanghai Jiao Tong University, Shanghai, China 2Institute for Nutritional Sciences, Shanghai Institute of Biological Sciences, Chinese Academy of Sciences, Shanghai,China 3NHGG, Bio-X Center, Shanghai Jiao Tong University, Shanghai, China 2005Cell Research2005,15,2:375
7急性心肌梗塞溶栓治疗对比研究显示文摘37所医院对急性心肌梗塞患者528例,随机分为尿激酶组(272例)和去纤酶组(256例)均为静脉法给药,尿激酶组并辅以阿司匹林和肝素,对比两组溶栓疗效。尿激酶组与去纤酶组比较:血管再通率分别为58.1%对40.6%(P<0.001);4周病死率分别为8.1%对17.6%(P<0.005);出血并发症分别为11.0%对27.0%(P<0.001)。说明尿激酶组疗效明显优于去纤酶组,且出血并发症较少。血管再通者较血管未通者严重并发症和梗塞延展明显减少,明显降低急性期病死率。(Collaborative Research Group. Fu Wai Hospital,CAMS, Bei jing 100037) 1994中华心血管病杂志1994,22,1:141
8第二次中国临床血脂控制达标率及影响因素多中心协作研究显示文摘目的了解我国临床血脂控制的最新现状,指导临床血脂异常防治实践。方法在全国21家省部级医院和6家地县级医院中,查阅2004年1月1日至2006年2月28日间开始服调脂药物,且同一药物同一剂量维持≥2个月的2237名患者病例资料,依据美国2004年国家胆固醇教育计划(NCEP)成人治疗组第三次报告(ATPBⅢ)及《中国成人血脂异常防治指南》标准计算血脂控制达标率。结果 (1)在符合任一血脂防治建议/指南的药物起始治疗标准的2094例患者中,80%来自省部级医院,60%为60岁以上,57%有胆固醇升高,15%无血脂异常,68%合并冠心病等动脉粥样硬化性疾病,75%合并高血压,80%为高危和极高危患者,84%使用他汀类药物,83%采取了不同程度的饮食治疗。(2)依据美国2004年 NCEP ATPⅢ最新报告,总达标率为34%,低危组、中危组、中高危组、高危组和极高危组达标率分别为85%、78%、61%、3 1%和22%,差异有统计学意义(趋势性检验 P<0.001);依据我国新的《成人血脂异常防治指南》,总达标率为50%,低危组、中危组、高危组和极高危组达标率分别为91%、77%、49%和38%,组间差异及趋势性检验均有统计学意义(P<0.001)。(3)联合用药者达标率为51%,单用他汀类35%,贝特类23%,烟酸类24%,其他类28%,组间差异有统计学意义(P<0.001)。(4)对1808例服用他汀类药物患者的多元 logistic 回归分析表明,他汀类药物剂量(高剂量比低剂量,OR=1.72,95%CI:1.15~2.58)、危险分层(极高危比低危,OR=0.02,95%CI:0.01~0.03)、基线 LDL-C[每升高0.259 mmol/L(10 mg/dl),OR=0.83,95%CI:0.80~0.86]和性别(女性比男性,OR=0.77,95%CI:0.60~0.99)等是影响达标率的主要因素。结论我国目前调脂药物的应用对象发生了很大变化,调脂治疗的目的已不单纯是为了降低胆固醇。临床血脂控制状况与各防治指南要求相距仍甚远,特别是高危和极高危患者。要进一步改善我国临床血脂控制状况,药物种类、药物剂量、联合治疗和治疗性生活方式改变等多方面均需要进一步提高。The Collaborative Research Group for the Second Multi-center Survey of Clinical Management of Dyslipidemia in China 2007中华心血管病杂志2007,35,5:127
9全国公示语翻译现状的调查与分析显示文摘本研究通过对全国公示语翻译与使用现状进行调查,了解外籍人士对公示语翻译与使用的满意度和需求,比较中外在公示语的翻译与使用方面的异同,探讨公示语的翻译与使用的功能性和语用性问题及解决对策,确认公示语翻译与使用的发展趋势、重点和难点;为翻译、教学研究机构提供公示语翻译与使用方面的建议,促进公示语的引进、翻译与使用,并为制定国家公示语翻译标准提供参考依据。研究者提出翻译者要更关注信息接受者的感受;翻译实践要更贴近现实,理论研究要更创新求真;并提出由中外专家结合进行研究是满足外籍人员公示语信息需求的最佳翻译工作组合模式。报告建议由中国翻译协会等机构形成强势组合,加快公示语翻译和国际化都市、旅游目的地信息服务体系建设。C-E Signs Research Center ( Beijing International Studies University) 2007中国翻译2007,28,5:99
10急性病毒性心肌炎的药物治疗观察显示文摘目的 全国十二家大型医院协作观察中西医结合治疗急性病毒性心肌炎疗效。方法 对 10 2 8例临床诊断为急性病毒性心肌炎患者随机各分两组 ,治疗组 60 2例 ,用中西医结合 (黄芪、牛磺酸、泛葵利酮、抗心律失常药等)治疗 ;对照组 4 2 6例 ,用常规 (极化液、抗心律失常药等 )治疗。结果 中西医结合治疗组临床症状改善、外周血肠道病毒阴转、心电图ST T改变及房室传导阻滞、阵发性心房颤动、窦房传导阻滞等恢复均优于对照组(P <0 .0 1、0 .0 5 ) ;对早搏及心功能改善两组间无统计学差异(P <0 .0 5 )。结论 在目前对急性病毒性心肌炎无特效药物治疗的情况下 ,采用中西医结合治疗可作为一种治疗手段。Collaborative Group of “Key National Medical Projects for the Ninth Five Year Plan Research” (Correspondence: YANG Yingzhen, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital,Shanghai Medical University,Shanghai 200032) 1999中华心血管病杂志1999,27,6:94
11Spatiotemporal variations of vegetation cover on the Chinese Loess Plateau(1981―2006):Impacts of climate changes and human activities显示文摘Spatiotemporal variations of Chinese Loess Plateau vegetation cover during 1981-2006 have been investigated using GIMMS and SPOT VGT NDVI data and the cause of vegetation cover changes has been analyzed, considering the climate changes and human activities. Vegetation cover changes on the Loess Plateau have experienced four stages as follows: (1) vegetation cover showed a continued increasing phase during 1981―1989; (2) vegetation cover changes came into a relative steady phase with small fluctuations during 1990―1998; (3) vegetation cover declined rapidly during 1999―2001; and (4) vegetation cover increased rapidly during 2002―2006. The vegetation cover changes of the Loess Plateau show a notable spatial difference. The vegetation cover has obviously increased in the Inner Mongolia and Ningxia plain along the Yellow River and the ecological rehabilitated region of Ordos Plateau, however the vegetation cover evidently decreased in the hilly and gully areas of Loess Plateau, Liupan Mountains region and the northern hillside of Qinling Mountains. The response of NDVI to climate changes varied with different vegetation types. NDVI of sandy land vegetation, grassland and cultivated land show a significant increasing trend, but forest shows a decreasing trend. The results obtained in this study show that the spatiotemporal variations of vegetation cover are the outcome of climate changes and human activities. Temperature is a control factor of the seasonal change of vegetation growth. The increased temperature makes soil drier and unfavors vegetation growth in summer, but it favors vegetation growth in spring and autumn because of a longer growing period. There is a significant correlation between vegetation cover and precipitation and thus, the change in precipitation is an important factor for vegetation variation. The improved agricultural production has resulted in an increase of NDVI in the farmland, and the implementation of large-scale vegetation construction has led to some beneficial effect in ecology.XIN ZhongBao1,2, XU JiongXin1 & ZHENG Wei1, 2 1 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 2 Graduate University of the Chinese Academy of Sciences, Beijing 100049, China 2008Science China Earth Sciences2008,51,1:112
12Remarks on Urban Spatial Growth Management ResearchCHEN Jinfu,Professor,Director,Teaching & Research Office on Urban Planning,Architecture and Urban Planning School,Huazhong University of Science and Technology PhD Candidate,College of Public Administration,Huazhong University of Science and Technology,Wuhan,P.R.China.REN Lijuan,Postgraduate,Architecture and Urban Planning School,Huazhong University of Science and Technology,Wuhan,P.R.China.YU Cheng,Postgraduate,Architecture and Urban Planning School,Huazhong University of Science and Technology,Wuhan,P.R.China.XU Xiaolei,Postgraduate,Architecture and Urban Planning School,Huazhong University of Science and Technology,Wuhan,P.R.China.LI Xinyan,Lecturer,Architecture and Urban Planning School,Huazhong University of Science and Technology,Wuhan,P.R.China. 2010China City Planning Review2010,19,2:180
13MICROSTRUCTURAL MODEL OF GATORIZED WASPALOY IN THE ISOTHERMAL FORGING PROCESS显示文摘A microstructural model, which was to predict the evolution of microstructure of Gatorized Waspeloy in the isothermal forcing process, was developed in terms of dynamic recrystallization and grain growth. Three steps of experiment were conducted during developing the model: (1) .Specimens were compressed in M FS testing machine; (2) Dynamic recrystallization and grain growth were discussed; (3) Dynamic recrys- tallization model and grain growth mode were set up. The agreement of simulated results and experimental data is fine.J.P. Hu (Chongqing Iron and Steel Designing Research Institute, Chongqing 400013, China) J. Y. Zhuang, J.H. Du, Q. Deng, D. Feng and Z. Y. Zhong (Central Iron and Steel Research Institute, Beijing 100081, China) P. Janschek and J. Kramer (Thyssen Umformte 2001Acta Metallurgica Sinica(English Letters)2001,14,3:61
14METAMORPHIC MECHANISMSAND THEIR CONFIGURATION MODELS显示文摘The concept of metamorphic mechanisms is presented, configuration models and configuration transformations relating to a set of new matrix operations are discussed and proposed. The configuration of a metamorphic mechanism reflects the connectivity change in the mechanism during motions which results in mobility change and presents the characteristics of the mechanism which is discussed in various applications particularly in decorative artifacts. The characteristics is further investigated with mobility analysis.Dai Jiansheng (Department of Mechanical Engineering, School of Physical Sciences and Engineering, King’s College, University of London,Strand,London WC2R 2LS, United kingdom) Zhang Qixian (Robotics Research Institute,Beijing University of Aeronautics and 2000Chinese Journal of Mechanical Engineering2000,13,3:61
15Temperature variations recovered from tree-rings in the middle Qilian Mountain over the last millennium显示文摘Based on the cross-dated tree-ring samples collected from the middle Qilian Moun- tain, a standard ring-width chronology had been developed, which covered the period AD 1000 to 2000. The correlations between the chronology and climatic records from the nearby meteorological stations indicated that temperature was the dominant climatic factor for tree growth at upper timberline, and the most important climatic factor for the tree growth in the area was the mean temperature from previous December to current April. The temperature variations recovered from the ring-width data showed a cold period during the “Little Ice Age” and the con- tinuous warming during the twentieth century. Comparison between the ring-width chronology and δ18O records from the Dunde ice core in the Qilian Mountain indicated that there was a con- sistent trend in both time series. A significant correlation existed between our ring-width chro- nology and the Northern Hemispheric temperature, suggesting that the climate changes in the Qilian Mountain were not only driven by regional factors, but also responsive to the global cli- mate.LIU Xiaohong1,2, QIN Dahe1, SHAO Xuemei , CHEN Tuo1 & REN Jiawen12 1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China 2. Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 2005Science China Earth Sciences2005,48,4:66
16Magnetostratigraphy of the late Cenozoic Laojunmiao anticline in the northern Qilian Mountains and its implications for the northern Tibetan Plateau uplift显示文摘Cenozoic sediments in the foreland basin--Jiuquan Basin in west Hexi Corridor recorded tectonic uplift information of the Qilian Mountains. High resolution paleomagnetic dating of the Laojunmiao (LJM) section across the central LJM anticline in the southern Jiuquan Basin reveals ages of the Getanggou Member, Niugetao Member in the Shulehe Formation, the Yumen Conglomerate, Jiuquan Conglomerate and Gobi Formation at >13-8.3 Ma, 8.3-4.9 Ma, 3.66-0.93 Ma, 0.84-0.14 Ma and 0.14-0 Ma, respectively. Sedimentary evolution study suggests that the Qilian Mountains should begin to rise gradually since ~8-6.6 Ma, accompanied by sedimentary environments changing from lacustrine mudstones-sandstones to alluvial conglomerates. Rapid uplift of the Qilian Mountains began at ~3.66 Ma, followed by a series of stepwise or intermittent intensive uplifts at about <1.8-1.23 Ma, 0.93-0.84 Ma and 0.14 Ma, which finally resulted in the present high Qilian Mountains.FANG Xiaomin1,2, ZHAO Zhijun3,2, LI Jijun2, YAN Maodu2, PAN Baotian2, SONG Chunhui2 & DAI Shuang2 1. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China 2. Key Laboratory of Western China’s Environmental Systems, Ministry of Education & College of Resources and Environment, Lanzhou University, Lanzhou 730000, China 3. College of Geography, Nanjing Normal University, Nanjing 210097, China 2005Science China Earth Sciences2005,48,7:61
17Current status and future tendency of lake eutrophication in China显示文摘Current trophic status and trend of Chinese freshwater lakes were investigated in this study. The results showed that all lakes studied were commonly undergoing the eutrophication process, water quality decreased and lake's ecosystem is being declined. Most of the urban lakes are facing serious eutrophication. Many medium-sized lakes are in metrophic or eutrophic status, some local water are even approaching the hypertrophic level. The famous five freshwater lakes in China have entered into eutrophication in the condition of higher nutrient load. Lake Taihu, Hongze and Caohu are already in eutrophic state. Eutrophic lakes are mainly distributed in the middle and lower reaches of Yangtze River and Yungui plateau. Lake eutrophication developed rapidly. Among the 34 lakes studied in 1970's, most of lakes were in the mesotrophic status,mesotrophic water area accounted for 91.8%. With the nine year of 1978-1987 the area percentage of oligotrophic lakes decreased from 3.2% to 0.53%, and that of eutrophic lakes increased from 5.0% to 55.01%. Recent data showed 57.5% lakes were in eutrophic and hypertrophic status of the 40 surveyed lakes.Eutrophic trend of Lake Taihu, Chaohu and Xuanwu in the region of the middle and lower reaches of Yangtze River was predicated using the ecological stress model. The results showed that in 2008 Lake Taihu, Chaohu and Xuanwu might be of eutrophication, eutrophication and hypertrophication, respectively if no control measurement is taken. Provided the pollution water treatment rate is 60% in 2030, approximately 30 billion ton pollution water would still be discharged directly in the lakes. Therefore, in 2030 the urban lakes in China might be eutrophication or hypertrophication, and most of the medium-sized lakes at the urban-rural fringe might be in eutrophication or hypertrophication. The famous five biggest freshwater lakes in China might be eutrophication if control countermeasures are taken as now.Lake eutrophication has become a serious environmental problem in China. Based on the domestic and foreign experiences of the eutrophic control technologies, both nutrient pollution control and lake ecological restoration should be carried out and this may be the guidance for the eutrophic control of lakes in China.JIN Xiangcan, XU Qiujin & HUANG Changzhu Chinese Research Academy of Environmental Sciences, Beijing 100012, China 2005Science China(Life Sciences)2005,48,z2:68
18Inhibiting effect of antisense oligonucleotides phosphorthioate on gene expression of TIMP-1 in rat liver fibrosis显示文摘AIM To observe the inhibition of antisenseoligonucleotides (asON) phosphorthioate to thetissue inhibitors metalloproteinase-1 (TIMP-1)gene and protein expression in the liver tissue ofimmunologically induced hepatic fibrosis rats.The possibility of reversing hepatic fibrosisthrough gene therapy was observed.METHODS Human serum albumin (HSA) wasused to attack rats, as hepatic fibrosis model, inwhich asONs were used to block the gene andprotein expressing TIMP-1. According to theanalysis of modulator, structure protein, codingseries of TIMP-1 genome, we designed fourdifferent asONs. These asONs were injected intothe hepatic fibrosis models through coccygealvein. The results was observed by RT-PCR formeasuring TIMP-1 mRNA expression,immunohistochemistry and in situ hybridizationfor collagen Ⅰ, Ⅲ, special staining of collagenfiber, and electron microscopic examination.RESULTS Hepatic fibrosis could last within 363days in our modified model. The expressinglevel of TIMP-1 was high during hepatic fibrosisprocess. It has been proved by theimmunohistochemical and the electronmicroscopic examination that the asONphosphorthioate of TIMP-1 could exactly expressin vivo. The effect of colchicine wasdemonstrated to inhibit the expressing level ofmRNA and the content of collagen Ⅰ, Ⅲ in theliver of experimental hepatic fibrosis rats.However, the electron microscopy research andthe pathologic grading of hepatic fibrosisshowed that there was no significant differencebetween the treatment group and the modelgroup (P>0.05).CONCLUSION The experimental rat model ofhepatic fibrosis is one of the preferable modelsto estimate the curative effect of anti-hepaticfibrosis drugs. The asON phosphorthioate ofTIMP-1 could block the gene and proteinexpression of TIMP-1 in the liver of experimentalhepatic fibrosis rats at the mRNA level. It ispossible to reverse hepatic fibrosis, and it isexpected to study a new drug of anti-hepaticfibrosis on the genetic level. Colchicine has verylimited therapeutic effect on hepatic fibrosis,furthermore, its toxicity and side effects areobvious.Qing He Nie Yong Qian Cheng Yu Mei Xie Yong Xing Zhou Yi Zhan Cao The Center of Infectious Disease Diagnosis and Treatment of PLA,Tangdu Hospital,Forth Military Medical University,Xi’an 710038,Shaanxi Province,ChinaDr,Qing He Nie graduated from Qinghai Medical College as a doctor in 1983,got master degree at Beijing 302 Army Hospital in 1993,got doctor degree at the Third Military Medical University in 1998,engaged in postdoctoral research at the Fourth Military Medical University from 1998 to 2000,now an associate professor,specialized in clinical and experimental research of infectious diseases,had more than 90 papers published,coauthor of ten books,first author of one book. 2001World Journal of Gastroenterology2001,7,3:73
19义务教育均衡发展是实现教育公平的基石显示文摘我国义务教育均衡发展取得了很大成就,但依然面临着诸多问题和挑战。基于问题及其原因分析,相应的政策建议是明确政府是义务教育均衡发展的全部责任方,把地方促发展和中央给补偿有机结合起来;建立以'有质量的公平增长'为导向的义务教育资源配置机制;建立国家义务教育质量标准,发挥义务教育质量监测对教育公平发展的作用,并实行相应的问责制度;建立全国通用的义务教育卡,取消义务教育学校借读费,完善异地接受义务教育的保障机制;资助承担义务教育责任的民办学校。Center for Educational Policy Analysis of China National Institute for Educational Research 2007教育研究2007,28,2:75
20Estimation on the response of glaciers in China to the global warming in the 21st century显示文摘Glaciers in China can be categorized into 3 types, i.e. the maritime (temperate) type, sub-continental (sub-polar) type and extreme Continental (polar) type, which take 22%, 46% and 32% of the total existing glacier area (59 406 km2) respectively. Researches indicate that glaciers of the three types show different response patterns to the global warming. Since the Maxima of the Little Ice Age (the 17th century), air temperature has risen at a magnitude of 1.3℃on average and the glacier area decreased corresponds to 20% of the present total glacier area in western China. it is estimated that air temperature rise in the 2030s, 2070s and 2100s will be of the order of 0.4-1.2, 1.2-2.7 and 2.1-4.0 K in western China. With these scenarios, glaciers in China will suffer from further shrinkage by 12%, 28% and 45% by the 2030s, 2070s and 2100s. The uncertainties may account for 30%-67% in 2100 in China.SHI Yafeng & LIU Shiyin Laboratory of Ice Core and Cold Regions Environment, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China 2000Chinese Science Bulletin2000,45,7:71
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