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1083篇 您的检索式:作者名="LONG ZHOU"
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1Multimodality treatment in hepatocellular carcinoma patients with tumor thrombi in portal vein显示文摘AIM To compare the therapeutic effect andsignificances of multimodality treatment forhepatocellular carcinoma (HCC) with tumorthrombi in portal vein (PVTT).METHODS HCC patients (n = 147) with tumortrombi in the main portal vein or the first branchof portal vein were divided into four groups bythe several therapeutic methods. There wereconservative treatment group in 18 out ofpatients (group A); and hepatic artery ligation(HAL) and/or hepatic artery infusion (HAl)group in 18 patients (group B), in whompostoberative chemoembolization was doneperiodically; group of removal of HCC with PVTTin 79 (group C) and group of transcatheterhepatic arterial chemoembolization (TACE) orHAl and/or portal vein infusion (PVI) afteroperation in 32 (group D).RESULTS The median survival period was 12months in our series and the 1-, 3-, and 5-yearsurvival rates were 44.3%, 24.5% and 15.2%,respectively. The median survival times were 2,5, 12 and 16 months in group A, B, C and D,respectively. The 1-, 3- and 5-year survival rateswere 5.6%, 0% and 0% in group A; 22.2%,5.6% and 0% in group B; 53.9%, 26.9% and16.6% in group C; 79.3%, 38.9% and 26.8% ingroup D, respectively. Significant differenceappeared in the survival rates among the groups(P<0.05).CONCLUSION Hepatic resection with removalof tumor thrombi and HCC should increase thecurative effects and be encouraged for theprolongation of life span and quality of life forHCC patients with PVTT, whereas the besttherapeutic method for HCC with PVTT is withregional hepatic chemotherapy orchemoemblization after hepatic resection withremoval of tumor thrombi.Jia Fan Zhi Quan Wu Zhao You Tang Jian Zhou Shuang Jian Qiu Zeng Chen Ma Xin Da Zhou Sheng Long Ye Liver Cancer Institute, Zhongshan Hospital, Fudan University Medical Center (Former Shanghai University), 136 Yixueyuan Road, Shanghai 200032, China 2001World Journal of Gastroenterology2001,7,1:80
2Heavy Metal Transfer from Soil to Vegetable in Southern Jiangsu Province, China显示文摘Vegetable fields in peri-urban areas receive large amounts of extraneous heavy metals because of rapid urbanization and industrialization in China. The concentrations of Cu, Zn, and Pb in 30 soil samples and 32 vegetable samples, collected from 30 different sites in southern Jiangsu Province of China, were measured and their transfer from soil to vegetable was determined. The results showed that the soil samples had wide ranges of pH (4.25–7.85) and electrical conductivity (EC) (0.24–3.42 dS m-1). Among the soil samples, there were four soil samples containing higher Cu and two soil samples containing higher Zn concentrations than those specified in the Chinese Soil Environmental Quality Standard II. However, no vegetable sample was found to contain a high level of Cu or Zn. In contrast, one vegetable sample contained 0.243 mg Pb kg-1 FW, which was above the Chinese Food Hygiene Standard, whereas the corresponding soil Pb concentration was lower than the Chinese Soil Environmental Quality Standard II. The transfer coefficients of Cu of all vegetable samples exceeded the suggested coefficient range, implying that extraneous Cu had high mobility and bioavailability to vegetables. There was no significant correlation between extractable soil heavy metal concentrations with four kinds of extractants and soil pH, EC, heavy metal concentrations in vegetables and soils, except that soil pH correlated well with the extractable soil Cu, Zn, and Pb concentrations with 1.0 mol L-1 NH4NO3. Moreover, diethylenetriamine pentaacetic acid (DTPA) extraction method was a more effcient method of extracting heavy metals from the soils independent of soil pH and EC than other three methods used.HAO Xiu-Zhen ZHOU Dong-Mei HUANG De-Qian CANG Long ZHANG Hai-Lin WANG Hui 2009Pedosphere2009,19,3:46
3TGF-β signaling in cancer metastasis显示文摘转变生长因素(TGF )- 发信号的事件是众所周知的控制多样的进程和众多的回答例如房间增长,区别, apoptosis,和移植。在癌症的 TGF- 发信号戏上下文依赖者角色:在 pre 恶意的房间, TGF- 首先作为肿瘤 suppressor 工作,当在癌症的以后的阶段发信号的 TGF- 支持侵略和转移时。最近的研究也建议了在 TGF- 发信号和另外的发信号的小径之间的串音例如河马, Wnt, EGFR/RAS,和 PI3K/AKT 小径,可以实质地贡献我们 TGF- 发信号和癌症的当前的理解。由于 TGF- 的广阔效果, TGF- 和它的下游的发信号部件的封锁提供多重治疗学的机会。因此,为为众多的疾病表明治疗的 anti-TGF- 的眼界显得明亮并且将提供珍贵信息并且想在这药上分子的设计。在这评论,我们集中于最近的卓见进在可以贡献新奇指向癌症的治疗的发展的癌症转移发信号的 TGF- 的规定。Feng Xie Li Ling Hans van Dam Fangfang Zhou Long Zhang 2018Acta Biochimica et Biophysica Sinica2018,50,1:36
4Using Remote Sensing and GIS Technologies to Estimate Grass Yield and Livestock Carrying Capacity of Alpine Grasslands in Golog Prefecture,China显示文摘Remote sensing data from the Terra Moderate-Resolution Imaging Spectroradiometer (MODIS) and geospatial data were used to estimate grass yield and livestock carrying capacity in the Tibetan Autonomous Prefecture of Golog, Qing-hai, China. The MODIS-derived normalized difference vegetation index (MODIS-NDVI) data were correlated with the aboveground green biomass (AGGB) data from the aboveground harvest method. Regional regression model between the MODIS-NDVI and the common logarithm (LOG10) of the AGGB was significant (r2 = 0.51, P < 0.001), it was, there-fore, used to calculate the maximum carrying capacity in sheep-unit year per hectare. The maximum livestock carrying capacity was then adjusted to the theoretical livestock carrying capacity by the reduction factors (slope, distance to water, and soil erosion). Results indicated that the grassland conditions became worse, with lower aboveground palatable grass yield, plant height, and cover compared with the results obtained in 1981. At the same time, although the actual livestock numbers decreased, they still exceeded the proper theoretical livestock carrying capacity, and overgrazing rates ranged from 27.27% in Darlag County to 293.99% in Baima County. Integrating remote sensing and geographical information system technologies, the spatial and temporal conditions of the alpine grassland, trend, and projected stocking rates could be forecasted for decision making.YU Long ZHOU Li LIU Wei ZHOU Hua-Kun 2010Pedosphere2010,20,3:32
5新加坡最大回用水处理厂污水短程硝化厌氧氨氧化脱氮工艺显示文摘总结了新加坡樟宜回用水处理厂4次采样的结果,该厂日处理城市污水80万t.在好氧区很好地实现了部分硝化和亚硝酸盐积累,其中好氧氨氧化率平均为72.2%,亚硝酸盐积累率平均为76.0%.在缺氧区氨氮和亚硝酸盐得到了同步去除(厌氧氨氧化).物料衡算结果表明:初沉池的出水总氮的37.5%是通过自养脱氮去除,27.1%是通过传统的硝化/反硝化脱氮去除,其余部分总氮则存在于活性污泥和出水中.微生物和动力学研究表明:短悬浮或游离的厌氧氨氧化菌可存在于污泥龄较短的污水处理系统.最后从出水氮质量浓度、pH、碱度、曝气能耗及反应器容积等方面,将樟宜回用水处理厂的分段进水活性污泥法工艺与新加坡其他3个回用水处理厂的MEL/LE工艺进行了对比分析.Cao Yeshi Kwok Bee Hong Yan Zhou Yu Liu He Jianzhong Chua Seng Chye Wah Yuen Long Yahya Ghani 2015北京工业大学学报2015,41,10:32
6Patterns of synonymous codon usage bias in chloroplast genomes of seed plants显示文摘Codon usage in chloroplast genome of six seed plants (Arabidopsis thaliana, Populus alba, Zea mays, Triticum aestivum, Pinus koraiensis and Cycas taitungensis) was analyzed to find general patterns of codon usage in chloroplast genomes of seed plants. The results show that chloroplast genomes of the six seed plants had similar codon usage patterns, with a strong bias towards a high representation of NNA and NNT codons. In chloroplast genomes of the six seed plants, the effective number of codons (ENC) for most genes was similar to that of the expected ENC based on the GC content at the third codon position, but several genes with low ENC values were laying below the expected curve. All of these data indicate that codon usage was dominated by a mutational bias in chloroplast genomes of seed plants and that selection appeared to be limited to a subset of genes and to only subtly affect codon us-age. Meantime, four, six, eight, nine, ten and 12 codons were defined as the optimal codons in chloroplast genomes of the six seed plants.ZHOU Meng LONG Wei LI Xia 2008Forestry Studies in China2008,10,4:30
7Recent advances in friction and lubrication of graphene and other 2D materials:Mechanisms and applications显示文摘Two-dimensional materials having a layered structure comprise a monolayer or multilayers of atomic thickness and ultra-low shear strength.Their high specific surface area,in-plane strength,weak layer-layer interaction,and surface chemical stability result in remarkably low friction and wear-resisting properties.Thus,2D materials have attracted considerable attention.In recent years,great advances have been made in the scientific research and industrial applications of anti-friction,anti-wear,and lubrication of 2D materials.In this article,the basic nanoscale friction mechanisms of 2D materials including interfacial friction and surface friction mechanisms are summarized.This paper also includes a review of reports on lubrication mechanisms based on the film-formation,self-healing,and ball bearing mechanisms and applications based on lubricant additives,nanoscale lubricating films,and space lubrication materials of 2D materials in detail.Finally,the challenges and potential applications of 2D materials in the field of lubrication were also presented.Lincong LIU Ming ZHOU Long JIN Liangchuan LI Youtang MO Guoshi SU Xiao LI Hongwei ZHU Yu TIAN 2019Friction2019,7,3:29
8;he regulation of TGF-β/SMAD signaling by protein deubiquitination显示文摘Juan Zhang Xiaofei Zhang Feng Xie Zhengkui Zhang Hans van Dam Long Zhang Fangfang Zhou 2014Protein & Cell2014,5,7:27
9Analysis of the Results of Two Nationwide Surveys on Clonorchis sinensis Infection in China显示文摘Objective To examine Clonorchis sinensis infection in China and evaluate the effectiveness of efforts to prevent and control it,two nationwide surveys were undertaken in 31 provinces,autonomous regions,and municipalities(PAMs) during 1988-92(the 1990 survey) and during 2001-04(the 2003 survey).Methods During the period 2001-04,two sampling methods were applied.The first method repeated the stratified cluster random sampling used in the 1990 survey;the second method applied two-characteristic stratified cluster random sampling in 27 PAMs-the 2003 endemic area(EA) survey.The Kato-Katz thick smear method was used for the nationwide survey.Results The infection rates of Clonorchis sinensis in the 1990 and 2003 surveys were 0.311% and 0.579%,respectively.The infection rate was 2.40% in the 2003 EA survey,and it was estimated that 12.49 million people in China were infected with Clonorchis sinensis.Conclusion The 2003 survey showed that the standardized infection rate of Clonorchis sinensis increased by 74.85% compared with the 1990 survey.The infection rate in males was higher than in females;the infection rate among people eating raw fish or eating out frequently was higher than among those who did not.CHEN Ying Dan ZHOU Chang Hai XU Long Qi 2012Biomedical and Environmental Sciences2012,25,2:22
10A feasible strategy for focal cerebral ischemiareperfusion injury: remote ischemic postconditioning显示文摘It is difficult to control the degree of ischemic postconditioning in the brain and other ischemia-sensitive organs.Remote ischemic postconditioning could protect some ischemia-sensitive organs through measures on terminal organs.In this study,a focal cerebral ischemia-reperfusion injury model was established using three cycles of remote ischemic postconditioning,each cycle consisted of 10-minute occlusion of the femoral artery and 10-minute opening.The results showed that,remote ischemic postconditioning significantly decreased the percentage of the infarct area and attenuated brain edema.In addition,inflammatory nuclear factor-κB expression was significantly lower,while anti-apoptotic Bcl-2 expression was significantly elevated in the cerebral cortex on the ischemic side.Our findings indicate that remote ischemic postconditioning attenuates focal cerebral ischemia/reperfusion injury,and that the neuroprotective mechanism is mediated by an anti-apoptotic effect and reduction of the inflammatory response.Qiang Liu Shengnian Zhou Yaodong Wang Fang Qi Yuan Song Siwei Long 2014Neural Regeneration Research2014,9,15:21
11LncRNA SNHG12 ameliorates brain microvascular endothelial cell injury by targeting miR-199a显示文摘Long non-coding RNAs regulate brain microvascular endothelial cell death, the inflammatory response and angiogenesis during and after ischemia/reperfusion and oxygen-glucose deprivation/reoxygenation(OGD/R) insults. The long non-coding RNA, SNHG12, is upregulated after ischemia/reperfusion and OGD/R in microvascular endothelial cells of the mouse brain. However, its role in ischemic stroke has not been studied. We hypothesized that SNHG12 positively regulates ischemic stroke, and therefore we investigated its mechanism of action. We established an OGD/R mouse cell model to mimic ischemic stroke by exposing brain microvascular endothelial cells to OGD for 0, 2, 4, 8, 16 or 24 hours and reoxygenation for 4 hours. Quantitative real-time polymerase chain reaction showed that SNHG12 levels in brain microvascular endothelial cells increased with respect to OGD exposure time. Brain microvascular endothelial cells were transfected with pc DNA-control, pc DNA-SNHG12, si-control, or si-SNHG12. After exposure to OGD for 16 hours, these cells were then analyzed by 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide, trypan blue exclusion, western blot, and capillary-like tube formation assays. Overexpression of SNHG12 inhibited brain microvascular endothelial cell death and the inflammatory response but promoted angiogenesis after OGD/R, while SNHG12 knockdown had the opposite effects. miR-199a was identified as a target of SNHG12, and SNHG12 overexpression reversed the effect of miR-199a on brain microvascular endothelial cell death, the inflammatory response, and angiogenesis. These findings suggest that SNHG12 suppresses endothelial cell injury induced by OGD/R by targeting miR-199a.Fa-Qing Long Qing-Jie Su Jing-Xia Zhou De-Sheng Wang Peng-Xiang Li Chao-Sheng Zeng, Yi Cai 2018Neural Regeneration Research2018,13,11:21
12Efficacy of intramuscular matrine in the treatment of chronic hepatitis B显示文摘BACKGROUND: Hepatitis B virus (HBV) infection, a glo- bal public health problem, is the leading cause of cirrhosis and hepatocellular carcinoma (HCC) worldwide. There are more than 350 million HBV carriers in the world and up to one million die annually due to hepatitis B associated liv- er disease. So far no optimal treatment is available for pa- tients with chronic hepatitis B. In the paper we investigated the efficacy of intramuscular matrine in the treatment of chronic hepatitis B. METHODS: One hundred and twenty patients with chronic hepatitis B were randomly divided into matrine treatment group (n =60) and control group (n =60). The patients of the matrine group were given intramuscularly with matrine (an alkaloid extracted from a traditional Chinese herb Radix Sophorae Flavescentis by Guangzhou Ming Xing Pharmaceu cal Factory, Guangzhou, China) of 100 mg daily for 90 days in addition to conventional liver-protective drugs in- cluding glucurone, inosine, compound vitamin B and caryophyllin. The control group received conventional liv- er-protective drugs alone. Clinical manifestations and labo- ratory parameters including liver biochemistry and serum hepatitis B virus markers were monitored before and after treatment in the two groups. RESULTS: Significant differences were seen between the two groups in terms of improvement of clinical symptoms and signs, recovery of liver functions, and serum conver- sion from hepatitis Be antigen to HBe antibody and from positive to negative serum HBV DNA (P <0.05-0.01). The result of the matrine group was more marked than that of the control group. Serious side-effects were not observed except mild pain at the site of injection of matrine in a few patients. CONCLUSION: These results indicate that intramuscular matrine may be an economical, efficacious, safe drug for the treatment of chronic hepatitis B.Yao Long, Xiao-Tian Lin, Kun-Lun Zeng and Lian Zhang Zhanjiang, China Department of Infectious Diseases, Affiliated Hospital of Guangdong Medical College, Zhanjiang 524001, China Haibin Centre Hospital, Zhanjiang 524005, China Centre of Hepatology of Nanfang Hospital, First Military Medical University, Guang- zhou 510515, China 2004Hepatobiliary & Pancreatic Diseases International2004,3,1:21
13Efficient production of omega-3 fatty acid desaturase (sFat-1)-transgenic pigs by somatic cell nuclear transfer显示文摘Omega-3(ω-3) fatty acid desaturase transgenic pigs may improve carcass fatty acid composition. The use of transgenic pigs is also an excellent large animal model for studying the role of ω-3 fatty acids in the prevention and treatment of coronary heart disease and cancer. Transgenic pigs carrying synthesized fatty acid desaturase-1 gene (sFat-1) from Caenorhabditis briggsae by somatic cell nuclear transfer (SCNT) were produced for the first time in China. Porcine fetal fibroblast cells were transfected with a sFat-1 expression cassette by the liposome-mediated method. Transgenic embryos were reconstructed by nuclear transfer of positive cells into enucleated in vitro matured oocytes. A total of 1889 reconstructed embryos were transferred into 10 naturally cycling gilts. Nine early pregnancies were established, 7 of which went to term. Twenty-one piglets were born. The cloning efficiency was 1.1% (born piglets/transferred embryos). The integration of the sFat-1 gene was confirmed in 15 live cloned piglets by PCR and Southern blot except for 2 piglets. Expression of the sFat-1 gene in 12 of 13 piglets was detected with RT-PCR. The data demonstrates that an efficient system for sFat-1 transgenic cloned pigs was developed, which led to the successful production of piglets expressing the sFat-1 gene.PAN DengKe1, ZHANG Li1, ZHOU YanRong2, FENG Chong1, LONG Chuan1, LIU Xiao1, WAN Rong3, ZHANG Jian3, LIN AiXing3, DONG EnQiu4, WANG ShuChen4, XU HouGang4 & CHEN HongXing2 1 Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China 2 Beijing Institute of Biotechnology, Beijing 100071, China 3 China Agricultural University, Beijing 100193, China 4 Yutian Breeding Swine Farms, Yutian 064104, China 2010Science China(Life Sciences)2010,53,4:21
14Near-diffraction-limited linearly polarized narrow-linewidth random fiber laser with record kilowatt output显示文摘In this paper, we propose and experimentally investigate a linearly polarized narrow-linewidth random fiber laser(RFL) operating at 1080 nm and boost the output power to kilowatt level with near-diffraction-limited beam quality using a master oscillation power amplifier. The RFL based on a half-opened cavity, which is composed of a linearly polarized narrow-linewidth fiber Bragg grating and a 500 m piece of polarization-maintained Ge-doped fiber, generates a 0.71 W seed laser with an 88 pm full width at half-maximum(FWHM) linewidth and a 22.5 dB polarization extinction ratio(PER) for power scaling. A two-stage fiber amplifier enhances the seed laser to the maximal 1.01 k W with a PER value of 17 dB and a beam quality of M_x^2=1.15 and M_y^2=1.13. No stimulated Brillouin scattering effect is observed at the ultimate power level, and the FWHM linewidth of the amplified random laser broadens linearly as a function of the output power with a coefficient of about 0.1237 pm∕W.To the best of our knowledge, this is the first demonstration of a linearly polarized narrow-linewidth RFL with even kilowatt-level near-diffraction-limited output, and further performance scaling is ongoing.JIANGMING XU LONG HUANG MAN JIANG JUN YE PENGFEI MA JINYONG LENG JIAN WU HANWEI ZHANG PU ZHOU 2017Photonics Research2017,5,4:20
15Measurement-device-independent quantum communication without encryption显示文摘Security in communication is vital in modern life. At present, security is realized by an encryption process in cryptography. It is unbelievable if a secure communication is achievable without encryption. In quantum cryptography, there is a unique form of quantum communication, quantum secure direct communication, where secret information is transmitted directly over a quantum channel. Quantum secure direct communication is drastically distinct from our conventional concept of secure communication, because it does not require key distribution, key storage and ciphertext transmission, and eliminates the encryption procedure completely. Hence it avoids in principle all the security loopholes associated with key and ciphertext in traditional secure communications. For practical implementation, defects always exist in real devices and it may downgrade the security. Among the various device imperfections, those with the measurement devices are the most prominent and serious ones. Here we report a measurementdevice-independent quantum secure direct communication protocol using Einstein-Podolsky-Rosen pairs. This protocol eradicates the security vulnerabilities associated with the measurement device,and greatly enhances the practical security of quantum secure direct communication. In addition to the security advantage, this protocol has an extended communication distance, and a high communication capacity.Peng-Hao Niu Zeng-Rong Zhou Zai-Sheng Lin Yu-Bo Sheng Liu-Guo Yin Gui-Lu Long 2018Science Bulletin2018,63,20:19
16Protective effect of selenium-enriched lactobacilluson CCI_4-induced liver injury in mice and its possible mechanisms显示文摘AIM: To study the protective effects and mechanisms of Se-enriched lactobacillus on liver injury caused by carbon tetrachloride (CCl4) in mice.MWTHODS: Seventy-two ICR mice were randomly divided into four groups: normal group, CCl4-induced model group,low Se-enriched lactobacillus treatment group (L-Se group),and high Se-enriched lactobacillus treatment group (H-Se group). During a 3-wk experimental period, the common complete diet was orally provided daily for normal group and model group, and the mice in L-Se and H-Se groups were given a diet with 2 and 4 mg of organoselenium from Se-enriched lactobacillus per kg feed, respectively. From the 2nd wk of experiment, the model group, L-Se group,and H-Se group received abdominal cavity injection of olive oil solution containing 500 mL/L CCl4 (0.07 mL/100 g body mass) to induce liver injury, and the normal group was given olive oil on every other day for over 2 wk. In the first 2 wk post injection with CCl4, mice in each group were killed. The specimens of blood, liver tissue, and macrophages in abdominal cavity fluid were taken. Then the activities of the following liver tissue injury-associated enzymes including glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), alanine aminotransferase (ALT) and aspartate aminotransferase (AST) as well as malondialdehyde (MDA) content were assayed. Changes of phagocytic rate and phagocytic index in macrophages were observed with Wright-Giemsa stain. Plasma TNF-α level was measured by radioimmunoassay. The level of intracellular free Ca2+ ([Ca2+]i) in hepatocytes was detected under a laser scanning confocal microscope.RESULTS: During the entire experimental period, the AST and ALT activities in liver were greatly enhanced by CCl4 and completely blunted by both low and high doses of Se-enriched lactobacillus. The Se-enriched lactobacillus-protected liver homogenate GSH-Px and SOD activities were higher or significantly higher than those in model group and were close to those in normal group. CCl4 significantly increased MDA content in liver homogenates, while administration of Se-enriched lactobacillus prevented MDA elevation. Phagocytic rate and phagocytic index of macrophages decreased after CCl4 treatment compared to those in normal control, but they were dramatically rescued by Se-enriched lactobacillus, showing a greatly higher phagocytic function compared to model group. CCl4 could significantly elevate plasma TNF-α and hepatocyte [Ca2+]i level, which were also obviously prevented by Se-enriched lactobacillus.CONCLUSION: Se-enriched lactobacillus can intervene in CCl4-induced liver injury in mice by enhancing macrophage function activity to keep normal and beneficial effects,elevating antioxidant-enzyme activities and reducing lipid peroxidation reaction, inhibiting excessive release of TNF-α,preventing the dramatic elevation of [Ca2+]i in hepatocytes.Long Chen Dao-Dong Pan Juan Zhou Ying-Zi Jiang 2005World Journal of Gastroenterology2005,11,37:19
17ERK kinase phosphorylates and destabilizes the tumor suppressor FBW7 in pancreatic cancer显示文摘Shunrong Ji Yi Qin Si Shi Xiangyuan Liu Hongli HU Hu Zhou Jing Gao Bo Zhang Wenyan Xu Jiang Liu Dingkong Liang Liang Liu Chen Liu Jiang Long Haijun Zhou Paul J Chiao Jin Xu Quanxing Ni Daming Gao Xianjun Yu 2015Cell Research2015,25,5:19
18Hydrogeochemical and Isotopic Evidence for Flow Paths of Karst Waters Collected in the Heshang Cave,Central China显示文摘Understanding of hydrological processes in caves is important to help us interpret paleoclimate records from speleothems. In this study,we integrated hydrogeological and hydrogeochemical properties to characterize the hydraulic behavior of karst waters in the Heshang Cave,Central China. Using geological and topographical analyses,we identified regional watershed boundaries and hydrogeological connections that were controlled by anticlinal geometry and faults. Water samples were collected from the Heshang Cave and potential recharge sites. Geochemical data of c(Sr2+)/c(Ca2+) and c(Mg2+)/c(Ca2+) ratios suggest that the drainage system in Heshang Cave consists of two flow paths. For vadose waters,including drip water and rimstone pool water,c(Sr2+)/c(Ca2+) ratio ranges from 0.000 6 to 0.001 1,and c(Mg2+)/c(Ca2+) ratio ranges from 0.97 to 1.1,indicating that recharge was mainly from rainfall infiltration through the overlying Cambrian dolomite stratum. In contrast,slope current and underground river waters have higher c(Sr2+)/c(Ca2+) ratios(values from 0.002 2 to 0.002 8),and lower c(Mg2+)/c(Ca2+) ratios(values from 0.50 to 0.64). These waters show homogeneous isotopic composition(δ18O:-7.15‰–-6.95‰; δD:-52.73‰–-51.31‰),implying recharge of allogeneic water from the Xiaoer River via karst conduits that pass through Ordovician limestone and Cambrian dolomite stratum.Xiang Long Ziyong Sun Aiguo Zhou Deliang Liu 2015Journal of Earth Science2015,26,1:18
19银白杨叶绿体基因组密码子用法分析(英文)显示文摘通过计算银白杨叶绿体基因组中各基因的ENc值、RSCU值、CAI值和GC3s的含量,分析银白杨叶绿体基因组密码子用法,并采用目前普遍使用的多变量统计分析方法(对应分析)和ENc.plot方法探讨了若干重要因子对银白杨叶绿体基因组密码子用法的效应。对应分析结果显示在影响最大的第一条向量轴上,基因的坐标位置与GC3s(r=349)极显著相关,而与该基因的表达水平(CAI)无显著相关性,但是在第二、三向量轴上基因的坐标位置与该基因的表达水平(CAI)呈极显著相关(r=-0.348和r=0.602,),说明碱基突变是影响密码子发挥作用的主要因素,而少数基因密码子用法受到翻译选择的作用;ENC-plot分析结果也证明了这一点。图2表2参34。ZHOU Meng LONG Wei LI Xia 2008Journal of Forestry Research2008,19,4:17
20Effectiveness of Different Waist Circumference Cut-off Values in Predicting Metabolic Syndrome Prevalence and Risk Factors in Adults in China显示文摘Objective To study the effectiveness of waist circumference cut-off values in predicting the prevalence of metabolic syndrome(MetS) and risk factors in adults in China. Methods A cross-sectional survey was condcuted in 14 provinces(autonomous region, municipality) in China. A total of 47 325 adults aged ≥20 years were selected by multistage stratified sampling, and questionnaire survey and physical and clinical examination were conducted among them. MetS was defined according to the International Diabetes Federation(IDF) criteria and modified IDF criteria.Results The age-standardized prevalence of MetS was 24.2%(22.1% in men and 25.8% in women) and 19.5%(22.1% in men and 18.0% in women) according to the IDF criteria and modified IDF criteria respectively. The age-standardized prevalence of pre-MetS was 8.1%(8.6% in men and 7.8% in women) according to the modified IDF criteria. The prevalence of MetS was higher in urban residents than rural residents and in northern China residents than in southern China residents. The prevalence of central obesity was about 30% in both men and women according to the ethnicity-specific cut-off values of waist circumference for central obesity(90 cm for men and 85 cm for women). Multivariate regression analysis revealed no significant difference in risk factors between the two MetS definitions. Conclusion Using both the modified IDF criteria and ethnicity-specific cut-off values of waist circumference can provide more useful information about the prevalence of MetS in China.ZHOU Hai Cheng LAI Ya Xin SHAN Zhong Yan JIA Wei Ping YANG Wen Ying LU Ju Ming WENG Jian Ping JI Li Nong LIU Jie TIAN Hao Ming JI Qiu He ZHU Da Long CHEN Li GUO Xiao Hui ZHAO Zhi Gang Li Qiang ZHOU Zhi Guang GE Jia Pu SHAN Guang Liang 2014Biomedical and Environmental Sciences2014,27,5:17
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