| 2 | Epidemiological characteristics of syphilis in Nanchong City from 2017 to 2021显示文摘This study analysed the epidemiological characteristics of the syphilis epidemic in Nanchong City of Sichuan Province to provide a theoretical basis for syphilis prevention and control.The syphilis epidemic data reported in the China Disease Control and Prevention Information System within the Nanchong City from 2017 to 2021.Chi-squared test and linear trend Chi-squared test were used to analyse the distribution of syphilis in terms of time,region,population and development stage.From 2017 to 2021,a total of 16,819 syphilis cases were reported in Nanchong City,with an average incidence rate of 52.35×10^(-5).The number of reported cases and the incidence rate showed an increasing trend and then decreasing.There were 8315 males with an incidence rate of 51.45×10^(-5) and 8504 females with an incidence rate of 53.26×10^(-5).The male to female ratio is 0.98:1.The age group is mainly middle-aged and older people over 50 years old.Occupations are primarily farmers,houseworkers and unemployed workers.Conclusions:In the past five years,the incidence of syphilis has first increased and then decreased in Nanchong City,but the epidemic situation remains severe.In order to effectively curb syphilis epidemic as soon as possible.It is necessary to increase comprehensive intervention efforts for high-risk groups,propose feasible measures to control the epidemic.An effective coordination mechanism needs to be established and extensively mobilise the whole society to participate in publicity and cooperate.At the same time,develop an efficient follow-up service to control the spread of syphilis and to improve the health of syphilis patients. | Shuangshuang Che Bo Zhang Qin Zhang Xincai Wei Peng Wu Hongbin Lan Xueqian Lin | 2022 | Life Research2022，5，3： | 0 |
| 3 | Genesis and distribution of oils in Mahu Sag,Junggar Basin,NW China显示文摘Based on the geological and geochemical analysis of potential source rocks in different formations and the classification of crude oil types,combined with the hydrocarbon generation thermal simulation experiments,the source,genesis,and distribution of different types of oils in the Mahu large oil province of the Junggar Basin are investigated.Four sets of potential source rocks are developed in the Mahu Sag.Specifically,the source rocks of the Permian Fengcheng Formation have the highest hydrocarbon generation potential and contain mainly TypesⅡandⅠorganic matters,with a high oil generation capacity.In contrast,the source rocks in other formations exhibit lower hydrocarbon generation potential and contain mainly TypeⅢorganic matter,with dominant gas generation.Oils in the Mahu Sag can be classified as three types:A,B and C,which display ascending,mountainous and descending C_(20)-C_(21)-C_(23)tricyclic terpenes abundance patterns in sequence,and gradually increasing relative content of tricyclic terpenes and sterane isomerization parameters,indicating an increasing oil maturity.Different types of oils are distributed spatially in an obviously orderly manner:Type A oil is close to the edge of the sag,Type C oil is concentrated in the center of the sag,and Type B oil lies in the slope area between Type A and Type C.The results of oil-source correlation and thermal simulation experiments show that the three types of oils come from the source rocks of the Fengcheng Formation at different thermal evolution stages.This new understanding of the differential genesis of oils in the Mahu Sag reasonably explains the source,distribution,and genetic mechanism of the three types of oils.The study results are of important guidance for the comprehensive and three-dimensional oil exploration,the identification of oil distribution in the total petroleum system,and the prediction of favorable exploration areas in the Mahu Sag. | DANG Wenlong GAO Gang YOU Xincai WU Jun LIU Shiju YAN Qi HE Wenjun GUO Liulinbo | 2023 | Petroleum Exploration and Development2023，50，4： | 0 |
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