The development history, etiology, epidemiology, clinical symptoms, pathological changes and diagnosis technology of porcine circovirus 3 were summarized, and countermeasures for prevention and control of the disease ...The development history, etiology, epidemiology, clinical symptoms, pathological changes and diagnosis technology of porcine circovirus 3 were summarized, and countermeasures for prevention and control of the disease were put forward based on the prevalence status in China.展开更多
[ Objective] The paper was explore the control effects of combination of plant induced resistant agents against tobacco mosaic vires （TMV）. [ Method ] The control effects of 6 different combinations of plant induced...[ Objective] The paper was explore the control effects of combination of plant induced resistant agents against tobacco mosaic vires （TMV）. [ Method ] The control effects of 6 different combinations of plant induced resistant agents against TMV of flue-cured tobacco cultivar HangDa were studied under the environ- ment of simulated disease nursery. [ Result] The combination of 2 induced agents polypeptide-agent and 3-acetonyl-3-hydroxyoxindole （AHO） had good control effect against TMV, which could obviously delay the incidence time of TMV in infected tobacco plants. With water and Duxiao as control, their average control effects against TMV of tobacco plants during field period reached 69.64% and 43.25% after transplanting for 70 d. They also showed significant superiority accord- ing to Duncan＇s test （p = 0.05 ） in the aspects of plant height and leaf number, and the growth and development condition of leaves was good. Tobacco seedlings carrying TMV virus had no direct correlation with whether the symptoms performed, the seedlings carrying virus would perform symptom only when the incidence condition was suitable. The peak period for the incidence of TMV in seedlings carrying virus was during 19 d after transplanting. Spraying effective agents during nursery stage and field period, as well as promoting quick growth at the initial stage of tobacco seedlings after transplanting were the key measures to control its inci- dence. [ Conclusion] The study provided theoretical basis for preparing the control measures against TMV.展开更多
目的:了解国内疾控系统生物安全三级实验室(以下简称“BSL-3实验室”)关键生物安全防护设备的使用现况,为推进国内高等级生物安全实验室关键生物安全防护设备的研发与应用提供参考。方法:利用中国疾控中心流行病学动态数据采集(epidemio...目的:了解国内疾控系统生物安全三级实验室(以下简称“BSL-3实验室”)关键生物安全防护设备的使用现况,为推进国内高等级生物安全实验室关键生物安全防护设备的研发与应用提供参考。方法:利用中国疾控中心流行病学动态数据采集(epidemiological dynamic data collection,EDDC)平台在网上填报、收集信息,运用描述性研究的方法分析生物安全柜、气(汽)体消毒装置、压力蒸汽灭菌器和生物安全型高效空气过滤装置4种设备的品牌、国产/进口占比、使用类型、价格等现况。结果:国内疾控系统BSL-3实验室中生物安全柜、气(汽)体消毒装置和压力蒸汽灭菌器的进口率高于国产率,生物安全型高效空气过滤装置国产化程度较高,各类设备的品牌呈多样化。结论:建议国家和地方管理部门加大对国产产品的扶持力度,鼓励相关企业自主研发实验室关键生物安全防护设备,提升国内实验室设施、设备技术质量,实现由进口为主向自主保障的转变。展开更多
Sulfur dioxide(SO_(2))is a typical pollutant that affects human health,climate,and environmental and ecological conditions.China has been experiencing high concentrations of SO_(2),particularly in urban areas,since th...Sulfur dioxide(SO_(2))is a typical pollutant that affects human health,climate,and environmental and ecological conditions.China has been experiencing high concentrations of SO_(2),particularly in urban areas,since the 1990s.In 2010,a"joint prevention and control"(JPC)policy was issued to address air pollution problems and strengthen the regulation of SO_(2)emissions.This study aimed to describe the mitigation effects of this policy on SO_(2)emissions in 116 Chinese cities from 2003 to 2017.We applied global and local Moran's I indices to confirm the presence of significant spatial autocorrelation in SO_(2)emissions and constructed four spatial models to assess the effect of the JPC policy in reducing SO_(2)emissions and its transmission mechanism.We found that the policy decreased SO_(2)emissions by 1.89×10^(4)tons,S0_(2)intensity by 1.70 tons per km^(2),and S0_(2)per capita of 158.49 tons per 10,000 people in each city,on average,all of which are significant changes.The empirical results also show that population growth,economic structure,and environmental protection significantly decrease SO_(2)emissions.Finally,we recommended policies to encourage regional cooperation under the JPC policy,with the aim of promoting furtherreductions in SO_(2)emissions.展开更多
基金Supported by the National Key R&D Program of China(2016YFD0501105,2016YFD0501106)
文摘The development history, etiology, epidemiology, clinical symptoms, pathological changes and diagnosis technology of porcine circovirus 3 were summarized, and countermeasures for prevention and control of the disease were put forward based on the prevalence status in China.
基金Supported by Key Project of China National Tobacco Company(110200801017)Co-funded Project of Yunnan Tobacco Company KunmingBranch(2010076)~~
文摘[ Objective] The paper was explore the control effects of combination of plant induced resistant agents against tobacco mosaic vires （TMV）. [ Method ] The control effects of 6 different combinations of plant induced resistant agents against TMV of flue-cured tobacco cultivar HangDa were studied under the environ- ment of simulated disease nursery. [ Result] The combination of 2 induced agents polypeptide-agent and 3-acetonyl-3-hydroxyoxindole （AHO） had good control effect against TMV, which could obviously delay the incidence time of TMV in infected tobacco plants. With water and Duxiao as control, their average control effects against TMV of tobacco plants during field period reached 69.64% and 43.25% after transplanting for 70 d. They also showed significant superiority accord- ing to Duncan＇s test （p = 0.05 ） in the aspects of plant height and leaf number, and the growth and development condition of leaves was good. Tobacco seedlings carrying TMV virus had no direct correlation with whether the symptoms performed, the seedlings carrying virus would perform symptom only when the incidence condition was suitable. The peak period for the incidence of TMV in seedlings carrying virus was during 19 d after transplanting. Spraying effective agents during nursery stage and field period, as well as promoting quick growth at the initial stage of tobacco seedlings after transplanting were the key measures to control its inci- dence. [ Conclusion] The study provided theoretical basis for preparing the control measures against TMV.
文摘目的:了解国内疾控系统生物安全三级实验室(以下简称“BSL-3实验室”)关键生物安全防护设备的使用现况,为推进国内高等级生物安全实验室关键生物安全防护设备的研发与应用提供参考。方法:利用中国疾控中心流行病学动态数据采集(epidemiological dynamic data collection,EDDC)平台在网上填报、收集信息,运用描述性研究的方法分析生物安全柜、气(汽)体消毒装置、压力蒸汽灭菌器和生物安全型高效空气过滤装置4种设备的品牌、国产/进口占比、使用类型、价格等现况。结果:国内疾控系统BSL-3实验室中生物安全柜、气(汽)体消毒装置和压力蒸汽灭菌器的进口率高于国产率,生物安全型高效空气过滤装置国产化程度较高,各类设备的品牌呈多样化。结论:建议国家和地方管理部门加大对国产产品的扶持力度,鼓励相关企业自主研发实验室关键生物安全防护设备,提升国内实验室设施、设备技术质量,实现由进口为主向自主保障的转变。
基金Shaanxi Social Science Project(2022YA14)Xi'an Social Science Planning Project(23JX66)+1 种基金Fundamental Research Funds for the Central Universities(KYFZ23008)Proof of Concept Foundation of Xidian University Hangzhou Institute of Technology under Grant No.GNYZ2023ZC0503.
文摘Sulfur dioxide(SO_(2))is a typical pollutant that affects human health,climate,and environmental and ecological conditions.China has been experiencing high concentrations of SO_(2),particularly in urban areas,since the 1990s.In 2010,a"joint prevention and control"(JPC)policy was issued to address air pollution problems and strengthen the regulation of SO_(2)emissions.This study aimed to describe the mitigation effects of this policy on SO_(2)emissions in 116 Chinese cities from 2003 to 2017.We applied global and local Moran's I indices to confirm the presence of significant spatial autocorrelation in SO_(2)emissions and constructed four spatial models to assess the effect of the JPC policy in reducing SO_(2)emissions and its transmission mechanism.We found that the policy decreased SO_(2)emissions by 1.89×10^(4)tons,S0_(2)intensity by 1.70 tons per km^(2),and S0_(2)per capita of 158.49 tons per 10,000 people in each city,on average,all of which are significant changes.The empirical results also show that population growth,economic structure,and environmental protection significantly decrease SO_(2)emissions.Finally,we recommended policies to encourage regional cooperation under the JPC policy,with the aim of promoting furtherreductions in SO_(2)emissions.
