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您的检索式：作者名="ZENG LongWei"
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| 1 | Abiogenic hydrocarbons in commercial gases from the Songliao Basin,China显示文摘This paper discusses the kinetic fractionation, composition and distribution characteristics of carbon and hydrogen isotopes for various alkane gases formed in different environments, by different mecha- nisms and from different sources in nature. It is demonstrated that the biodegradation or thermode- gradation of complex high-molecule sedimentary organic material can form microbial gas or thermogenic gas. The δ 13C1 value ranges from -110‰ to -50‰ for microbial gases but from -50‰ to -35‰ (even heavier) for thermogenic gases. Controlled by the kinetic isotope fractionation, both microbial and thermogenic gases have δ 13C and δ D values characterized by normal distribution, i.e. δ 13C1< δ 13C2< δ 13C3< δ 13C4 and δ DCH4< δ DC2H6< δ DC3H8<δ DC4H10, and by a positive correlation between the δ 13C and δ D values. Simple carbonbearing molecules (CH4, CO and CO2) can form abiogenic alkane gases via polymerization in the abiological chemical process in nature, with δ 13C1 heavier than -30‰. Moreover, controlled by the kinetic isotope fractionation, abiogenic alkane gases are characterized by a reverse distribution of δ 13C values and a normal trend of δ D values, namely δ 13C1> δ 13C2> δ 13C3> δ 13C4 and δ DCH4<δ DC2H6< δ DC3H8< δ DC4H10. The δ 13C values and δ D values are negatively correlated. Natural gases from 26 commercial gas wells distributed in the Xujiaweizi and Yingshan-Miaotaizi faulted depressions in the Songliao Basin, China, show δ13C1 values ranging from -30.5‰ to -16.7‰ with a very narrow δ D range between -203‰―-196‰. These gases are characterized by a reverse distribution of δ 13C values but a normal distribution of δ D values, and a negative correlation between their δ 13C and δ D values, indicating an abiological origin. The present study has revealed that abiogenic hydrocarbons not only exist in nature but also can make significant contribution to commercial gas reserviors. It is estimated that the reserve volume of alkane gases with abiogenic characteristics in these 26 gas wells in the Songliao Basin is over 500×108 m3. The prospecting practice in the Songliao Basin has demonstrated that abiogenic alkane gases are of a promising resource, and it provides an example for the investigation of and search for abiogenic commercial natural gases worldwide. | WANG XianBin GUO ZhanQian TUO JinCai GUO HongYan LI ZhenXi ZHUO ShengGuang JIANG HongLiang ZENG LongWei ZHANG MingJie WANG LianSheng LIU ChunXue YAN Hong LI LiWu ZHOU XiaoFeng WANG YongLi YANG Hui WANG Guang | 2009 | Science China Earth Sciences2009，52，2： | 6 |
| 2 | Integrated Rabies Surveillance-Hunan Province,China,2020显示文摘Introduction:The objective of this paper was to assess the epidemiology of rabies in Hunan Province,analyze the associated factors,understand the status of prevention and treatment after rabies exposure,evaluate the effectiveness of prevention and treatment,and provide a scientific basis for formulating effective prevention and control measures.Methods:The surveillance data of rabies in Hunan Province in 2020 were collected and analyzed by descriptive epidemiological method.Results:In 2020,a total of 59 cases of rabies were reported in Hunan Province,with an incidence rate of 0.09/100,000.Overall,42 cases(71.19%)were due to animal bites and 43 cases(72.88%)were of grade III.The proportion of hand and combined injury of hand was the highest(40.68%).A total of 603,261 cases of rabies exposure were reported from the rabies post-exposure prophylaxis(PEP)clinic in Hunan Province.Dogs were the main animal causing injuries,accounting for 74.21%.Only 83,418(13.84%)of the animals had a clear immune history,and a total of 11 dog attacks were reported in Hunan Province.The average immunity rate of dogs in the whole province was 30.98%.In 2020,554 dogs were sampled in the whole province;20 of them were positive for a positivity rate of 3.61%.Conclusions:Rabies in Hunan Province in 2020 had a relatively low prevalence.Failure to treat wounds,immunoglobulin injections,and vaccination after exposure were the main causes of rabies.Therefore,post-exposure management of rabies should be further strengthened to reduce the risk of rabies for high-risk populations. | Hao Yang Shengbao Chen Zhihui Dai Longwei Luo Qianlai Sun Shanlu Zhao Ge Zeng Ziyan Liu Shixiong Hu | 2022 | China CDC weekly2022，4，44： | 0 |
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