13 results on '"Yong Wang"'
Search Results
2. Transmission Characteristics of Different Students during a School Outbreak of (H1N1) pdm09 Influenza in China, 2009.
- Author
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Ligui Wang, Chenyi Chu, Guang Yang, Rongzhang Hao, Zhenjun Li, Zhidong Cao, Shaofu Qiu, Peng Li, Zhihao Wu, Zhengquan Yuan, Yuanyong Xu, Dajun Zeng, Yong Wang, and Hongbin Song
- Subjects
H1N1 influenza ,INFLUENZA transmission ,DISEASE outbreaks ,SCHOOL children ,PUBLIC health ,INFECTIOUS disease transmission ,PREVENTION - Abstract
Many outbreaks of A(H1N1)pdm09 influenza have occurred in schools with a high population density. Containment of school outbreaks is predicted to help mitigate pandemic influenza. Understanding disease transmission characteristics within the school setting is critical to implementing effective control measures. Based on a school outbreak survey, we found almost all (93.7%) disease transmission occurred within a single grade, only 6.3% crossed grades. Transmissions originating from freshmen exhibited a star-shaped network; other grades exhibited branch- or line-shaped networks, indicating freshmen have higher activity and are more likely to cause infection. R
0 for freshmen, calculated as 2.04, estimated as 2.76, was greater than for other grades (P,0.01). Without intervention, the estimated number of cases was much greater when the outbreak was initiated by freshmen than by other grades. Furthermore, the estimated number of cases required to be under quarantine and isolation for freshmen was less than that of equivalent other grades. So we concluded that different grades have different transmission mode. Freshmen were the main facilitators of the spread of A(H1N1)pdm09 influenza during this school outbreak, so control measures (e.g. close contact isolation) priority used for freshmen would likely have effectively reduced spread of influenza in school settings. [ABSTRACT FROM AUTHOR]- Published
- 2014
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3. Molecular characterization of Leishamania isolates from China by inter-simple sequence repeat polymerase chain reaction.
- Author
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Yong Wang, Yuetao Yang, Junyun Wang, Yifang Bao, Liren Guan, Chunhua Gao, and Feng Shi
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LEISHMANIA , *POLYMERASE chain reaction , *PHYLOGENY , *SYMPTOMS - Abstract
Leishmania has distinct epidemiological and biological characteristics and causes a variety of clinical symptoms. To understand the genetic diversity and the phylogenetic relationships among Leishmania isolates from China, 29 Leishmania isolates from different geographic origins, vectors, and hosts were analyzed using 21 inter-simple sequence repeat polymerase chain reaction (ISSR-PCR) primers. A total of 864 polymorphic bands were obtained. According to the results of the neighbor-joining phylogenetic tree and principal component analysis, the 29 isolates studied clustered into six groups. Isolates of Leishmania donovani complex from China share the highest similarity with the reference strain of L. donovani (DD8). This study helps to elucidate the genetic relationship among Leishmania isolates from China and similarities between Chinese isolates and World Health Organization reference strains. Furthermore, ISSR-PCR could also be a quick, simple, and reliable method for Leishmania species identification. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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4. Polymorphisms of TCF7L2 and HHEX genes in Chinese women with polycystic ovary syndrome.
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Pei Xu, Yena Che, Yunxia Cao, XiaoKe Wu, Haixiang Sun, Fengjing Liang, Jing Sun, Lu Ke, Long Yi, and Yong Wang
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FEMALE infertility ,CHROMOSOME polymorphism ,HORMONE synthesis ,GENETIC polymorphisms ,CASE studies - Abstract
Purpose This study was to evaluate whether polymorphisms of TCF7L2 (rs7903146) and HHEX (rs1111875) genes responsible for insulin secretion are associated with the polycystic ovary syndrome (PCOS) in Chinese people. Methods 326 PCOS patients and 290 healthy individuals as controls were studied. Blood samples were obtained for DNA analyses and hormone measurements. Genotyping of the TCF7L2 (rs7903146) and HHEX (rs1111875) genes was carried out by the polymerase chain reaction-restriction fragment length polymorphism method. Results We did not find statistically significant differences in the distribution of the TCF7L2 rs7903146 and HHEX rs1111875 polymorphisms between the Chinese women with PCOS and the controls. Levels of hormones such as insulin, FSH, LH, LH/FSH, P, T and E2 were also similar between the different genotypes of the genes TCF7L2 and HHEX, respectively, which was confirmed within either the PCOS subjects or controls. Conclusions There was no association of either of the two variants, rs7903146 of TCF7L2 and rs1111875 of HHEX, with the occurrence of PCOS in the Chinese population. [ABSTRACT FROM AUTHOR]
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- 2010
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5. Investigation of bathymetry and water quality of Lake Nam Co, the largest lake on the central Tibetan Plateau, China.
- Author
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Junbo Wang, Liping Zhu, Gerhard Daut, Jianting Ju, Xiao Lin, Yong Wang, and Xiaolin Zhen
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WATER quality ,BATHYMETRIC maps ,WATER levels ,LAKES ,GEOLOGICAL surveys ,STREAM chemistry ,WATER temperature ,HYDROGEN-ion concentration ,GEOLOGICAL basins - Abstract
- Abstract Comprehensive field investigations have been conducted four times on Nam Co, central Tibet, from September 2005 to September 2008. Here, we present the preliminary results focusing on the bathymetric survey and water quality measurements. The isobathic map shows that Nam Co is a high-altitude, deep lake where a flat and large basin lies in the central part with a water depth of more than 90 m. Water depth data from the northwestern bank areas of Nam Co provide unquestionable evidence of rising water levels in the last 3 decades because of the formation of two small islands that were still peninsulas in the 1970s. Water quality measurements taken at 19 stations during three summer field campaigns (2006, 2007 and 2008) covering almost all of the lake areas showed that the temperature, pH, dissolved oxygen and electric conductivity of surface water are on average 11.43°C, 9.21, 8.90 mg l[ABSTRACT FROM AUTHOR]
−1 and 1,851 μS cm−1 , respectively. The surface water shows no obvious spatial variability among all the stations. Vertical fluctuations of profiles, however, display some differences in thermocline and related parameters, such as pH and dissolved oxygen. According to the vertical variations of water quality parameters, the water column in relatively deep lake areas of Nam Co could be divided into three layers with distinctly various features: the epilimnion is from the surface to about 18–20 m depth in which the parameters are homogeneous with higher temperature and abundant sunlight; the metalimnion ranged from 20–60 m where a thermocline develops; the deepest layer forms a cold and dark hypolimnion. - Published
- 2009
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6. Waterbird Population Changes in the Wetlands at Chongming Dongtan in the Yangtze River Estuary, China.
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Zhijun Ma, Yong Wang, Xiaojing Gan, Bo Li, Yinting Cai, and Jiakuan Chen
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WATER birds ,BIRD populations ,WETLANDS ,HABITATS ,ECOLOGY - Abstract
We studied the changes in wetland habitats and waterbird communities between the 1980s and the 2000s at Chongming Dongtan, a Ramsar site in the Yangtze River estuary, an ecologically important region. This region is an important stopover site for shorebirds along the East Asian–Australasian flyway and is extensively used by waterfowl. A net loss of 11% of the wetland area was estimated during study periods at Chongming Dongtan. The change was dependent on wetland types: while the area of artificial habitats such as paddy fields and aquacultural ponds more than doubled, more than 65% of natural habitats including sea bulrush ( Scirpus mariqueter) and common reed ( Phragmites australis) marshes were lost over the two decades. An exotic plant species introduced from North America, smooth cordgrass ( Spartina alterniflora), occupied 30% of the vegetated intertidal zone by the 2000s. Although waterbird species richness did not change between the 1980s (110) and the 2000s (111), 13 species found in 1980s were replaced by 14 newly recorded species. Moreover, there were more species with declining trends (58) than with increasing trends (19). The population trends of species were affected by residential status and habitat types. Transients, wintering migrants, and habitat specialists were more likely to show declining trends compared to those breeding at Dongtan (including year-round and summer residents) and habitat generalists. Furthermore, species associated mainly with natural wetlands were more likely to decline than those associated mainly with artificial wetlands. These patterns suggest that the loss and change of wetland habitats at Chongming Dongtan adversely affected local population dynamics and might have contributed to the global decline of some waterbird species. Because Chongming Dongtan provides stopover and wintering habitats for many migratory waterbirds, protection and restoration of natural wetlands at Chongming Dongtan are urgently needed. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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7. Different responses of different altitudes surrounding Taklimankan Desert to global climate change.
- Author
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Chongyi, E., Yong, Wang, Taibao, Yang, Jiankang, Han, Hongchang, Hu, and Fengmei, Yang
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GLOBAL warming research ,GLOBAL warming & the environment ,CLIMATE change research ,CLIMATE research ,ICE caps ,ICE cores ,WAVELETS (Mathematics) - Abstract
Chongce Ice Cap (35°14′N, 81°07′E), located in the south margin of Taklimakan Desert, West Kunlun Mts. of China was sampled by coring in 1992, and this provides us with climate proxy of high altitudes (6,530 m). Through analyzing the weather observation stations surrounding Taklimakan Desert, the climate record of Hotan station was chosen to be the representative of low altitudes. Wavelet analysis were used to investigate the climatic variations of patterns, cycles and frequencies of different altitudes from 1954 to 1992, and different responses of different altitude surrounding Taklimakan Desert to global warming were recorded: (1) coherent decline of snow accumulation rate and dust deposition of high altitude recorded in Chongce ice core; (2) coherent increase of summer half-year precipitation and SAT of Hotan; (3) consistent variation tendency between dust deposit recorded in Chongce ice core and Hotan spring sandstorm days; (4) opposite variation tendency between Hotan precipitation and Chongce ice core snow accumulation rate and consistent cycles in general. By analyzing the mechanism of different responses, the predominant factors were determined of different altitudes: (1) at the low altitude, the vapor supply is predominant, and more vapor supplying means more precipitation; (2) at the high altitude, probably the population of dust aerosols which act as cloud ice nuclei in high altitude takes advantage over the vapor supply to affect the precipitation, and so the dust aerosol population reducing results in the wet deposition being reduced, thus the dust aerosol is the predominant factor. [ABSTRACT FROM AUTHOR]
- Published
- 2008
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8. Environmental changes reflected by n-alkanes of lake core in Nam Co on the Tibetan Plateau since 8.4 kaB.P.
- Author
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Xiao Lin, LiPing Zhu, Yong Wang, JunBo Wang, ManPing Xie, JianTing Ju, Mäusbacher, Roland, and Schwalb, Antje
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ALKANES ,GAS chromatography ,MASS spectrometry ,LAKES ,AQUATIC plants - Abstract
The n-alkanes are extracted from NMLC-1 core that was drilled in the Nam Co, central Tibet. They are measured by using Gas Chromatography and Mass Spectrometry (GC/MS) for componential and quantitative analyses. According to the constructed depth-age model, the component and concentration of n-alkanes, together with total organic carbon (TOC), total nitrogen (TN) and carbonate are used to elucidate palaeoenvironmental changes of Nam Co during the past 8.4 ka. The results indicate that Holocene environment performs three stages in the lake area. In the stage of 8.4-6.7 kaB.P., it was warmer while precipitation slightly increased. This stage was ended by an obvious cold/dry event. During 6.7- 5.8 kaB.P., temperature increased rapidly and reached its maximum values at about 6.0 kaB.P. The environments were warm/wet optimum for the blooming of terrestrial plants and submerged aquatic plants. After that, temperature decreased continuously and showed the lowest values at about 3.0 kaB.P. From 2.9 kaB.P. to the present, temperature rose again but alternated with cold and warm. The lake area tended to be dry after 1.4 kaB.P. During 600-400 aB.R, the environmental feature was the reflection of "Little Ice Age". [ABSTRACT FROM AUTHOR]
- Published
- 2008
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9. VEGF C−634G polymorphism is associated with protection from isolated ventricular septal defect: case–control and TDT studies.
- Author
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Jun Xie, Long Yi, Zheng-Feng Xu, Xu-Ming Mo, Ya-Li Hu, Dong-Jin Wang, Hao-Zhen Ren, Bing Han, Yong Wang, Chi Yang, Ye-Lin Zhao, Dong-Quan Shi, Yong-Zhong Jiang, Li Shen, Di Qiao, Shi-Lin Chen, and Bao-Jun Yu
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GENETIC polymorphisms ,VENTRICULAR septal defects ,CONGENITAL heart disease ,CHROMOSOME polymorphism ,VASCULAR endothelial growth factors ,HUMAN genetics - Abstract
The ventricular septal defect (VSD) is the most common congenital heart defect and no candidate susceptibility gene has been identified. Endocardial cushion and outflow septal morphogenesis, malalignment of which induces VSD, have been suggested to be mediated by the vascular endothelial growth factor (VEGF). Three single-nucleotide polymorphism (SNP) variants in promoter and 5′-UTR region of the VEGF gene, C−2578A (rs699947), G−1154A (rs1570360) and G−634C (rs2010963), were reported to alter its expression. We assessed the association in a Chinese population between these SNPs and VSD using a double approach: case–control and TDT designs. Among the three SNPs, only −634C allele was less frequently present in 222 patients compared to 352 controls (odds ratio: 0.76, 95% CI: 0.59–0.97, X
2 =5.06, P=0.024, not significant after a Bonferroni correction). This was significantly less transmitted to VSD patients (trios: 142) (odds ratio: 0.39, 95% CI: 0.25–0.62, X2 =8.11, df=1, P=0.004, corrected P=0.024). A similar result was observed for haplotype −2578C/−1154G/−634C allele in both studies (in TDT: X2 =7.51, df=1, P=0.006, corrected P=0.048). All these associations for the first time demonstrated that –634C allele was in a significant protective association against VSD, suggesting that VEGF dysregulation was involved in the pathological processes of VSD.European Journal of Human Genetics (2007) 15, 1246–1251; doi:10.1038/sj.ejhg.5201890; published online 11 July 2007 [ABSTRACT FROM AUTHOR]- Published
- 2007
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10. Retention capacities of several bryophytes for Hg(II) with special reference to the elevation and morphology of moss growth.
- Author
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Shou-Qin Sun, Ding-Yong Wang, Ming He, Xian-Yuan Li, and Cheng Zhang
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BRYOPHYTES ,MOSSES ,PLANT morphology ,MOUNTAINS - Abstract
Hg(II) Retention capacities of nine bryophyte species, collected from Jinfo Mountains (JFM) in Chongqing, China, had been investigated with special reference to the effect of morphology and elevation of moss growth. Results indicated that adsorption capacities of bryophytes for Hg(II) became stronger with the increase of multi-branches and leafy-shoots, as well as the elevation of moss growth, which was observed both in adsorption isotherm and adsorption kinetics experiments. Contrarily, the desorption kinetics showed a decrease tendency with the increase of multi-branches and leafy-shoots and the elevation of moss growth. The results demonstrated that bryophytes with higher multi-branches and leafy-shoots and higher growth elevation had a stronger adsorption capacity and a weaker desorption tendency, and therefore had a stronger retention capacity to Hg(II). The results disclosed the different relative sensitivity and retention capacity of mosses to pollution resulting from heavy metals, due to the differences in growth elevation and morphology. These should be considered when bryophytes were chosen as a tool for biomonitoring materials to environmental pollution, especially caused by Hg(II). [ABSTRACT FROM AUTHOR]
- Published
- 2007
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11. Total Innovation Management: a novel paradigm of innovation management in the 21st century.
- Author
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Qingrui Xu, Jin Chen, Zhangshu Xie, Jingjiang Liu, Gang Zheng, and Yong Wang
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DIFFUSION of innovations ,CASE studies ,TECHNOLOGICAL innovations ,INFORMATION dissemination ,INDUSTRIAL research - Abstract
Based on an ecosystem view of innovation management and in-depth case studies of firms in China and abroad, a novel paradigm of innovation management—Total Innovation Management (TIM)—is put forward in this paper. This new paradigm draws on three distinct areas of recent research, namely the innovation theory of the firm, the resource-based view (RBV), and the complexity theory. It introduces the theoretical framework of TIM, and presents a tri-dimensional innovation strategy model, which includes all elements of innovation, all innovators, and innovation in all times and spaces, and aims at value added and created. [ABSTRACT FROM AUTHOR]
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- 2007
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12. Ten polymorphic microsatellite loci in Tibetan chicken, Gallus gallus domesticus.
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Kong Yang, Xia Luo, Yong Wang, Ying Yu, and Zhihua Chen
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CHICKENS ,MICROSATELLITE repeats ,GENE libraries - Abstract
Through an improved enrichment protocol, a genomic library for (AC)
12 repeats was constructed and 34 microsatellite loci were isolated and characterized in an endangered animal, Tibetan chicken, Gallus gallus domesticus. In the 34 loci, ten loci showed a distinct allelic variation ranging from 4 to 14 alleles in 54 individuals tested. Polymorphism information content (PIC) ranged from 0.590 to 0.869 with an average of 0.713. Average observed and expected heterozygosities were 0.7988 (ranged from 0.310 to 1.000) and 0.7495 (ranged from 0.609 to 0.897), respectively. These ten microsatellites loci would be the valuable genetic markers for further investigation of Tibetan chicken. [ABSTRACT FROM AUTHOR]- Published
- 2010
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13. Test of the uplift of Tibetan Plateau by FG5 absolute gravimeter at Lhasa station.
- Author
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Weimin, Zhang, Yong, Wang, Houze, Xu, Chijun, Zhang, Xinghua, Hao, and Ming, Liu
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GRAVIMETRY , *GRAVIMETERS (Geophysical instruments) , *GRAVIMETRIC analysis - Abstract
Presents a study which monitored the uplift of the Tibetan Plateau using the FG5 absolute gravimeter. Observational accuracy of absolute gravimeter FG5; Results of absolute gravimetry at Lhasa station in China and analysis of its errors; Gravity decrease and uplift at Lhasa.
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- 2001
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