Rare animals and the main distribution areas in Guangxi Beibu Gulf were listed by data collection and local visiting in Guangxi Beibu Gulf, and status quo of Chinese White Dolphins was analyzed in terms of distributio...Rare animals and the main distribution areas in Guangxi Beibu Gulf were listed by data collection and local visiting in Guangxi Beibu Gulf, and status quo of Chinese White Dolphins was analyzed in terms of distribution area, the amount of resources and environmental pressures. Furthermore, it was proposed that marine pollution, habitat loss and human fishing result in the most serious damages on rare animals and it is urgent to take countermeasures.展开更多
[Objective] The aim was to assess the status quo of animal and plant resources in Turks River after the construction of the reservoir.[Method] Through field investigation,document check and sample identification,the d...[Objective] The aim was to assess the status quo of animal and plant resources in Turks River after the construction of the reservoir.[Method] Through field investigation,document check and sample identification,the distribution of animal and plants resources in Turks River after the construction of the reservoir was studied and corresponding protection measures were proposed.[Result] Under the influence of reservoir,there were fifteen types of rare animals,one species of national primary protected animals,seven species of national secondary protected animals,one species of provincial primary protected animals,six species of provincial secondary protected animals;there were twenty one species of rare plants,including two species of national secondary plant,five species of national tertiary protected animals,six types of Xinjiang primary protected plants,two species of Xinjiang secondary protected plants and six types of tertiary protected plants in Xinjiang.Protective policies for the land ecological environment were proposed,including corresponding compensation according to the rules and policies of government,plans being formulated for rare species protection,construction of natural reserves and artificial breeding base,usage of the environment in the reservoir and changes of ecological situation etc.[Conclusion] The study provided basis for the protection of animal and plants resources in Turks.展开更多
In humans, infection with the coronavirus, especially the severe acute respiratory syndrome coronavirus(SARS-CoV) and the emerging Middle East respiratory syndrome coronavirus(MERS-CoV), induces acute respiratory fail...In humans, infection with the coronavirus, especially the severe acute respiratory syndrome coronavirus(SARS-CoV) and the emerging Middle East respiratory syndrome coronavirus(MERS-CoV), induces acute respiratory failure, resulting in high mortality. Irregular coronavirus related epidemics indicate that the evolutionary origins of these two pathogens need to be identified urgently and there are still questions related to suitable laboratory animal models. Thus, in this review we aim to highlight key discoveries concerning the animal origin of the virus and summarize and compare current animal models.展开更多
Identification of security risk factors for small reservoirs is the basis for implementation of early warning systems.The manner of identification of the factors for small reservoirs is of practical significance when ...Identification of security risk factors for small reservoirs is the basis for implementation of early warning systems.The manner of identification of the factors for small reservoirs is of practical significance when data are incomplete.The existing grey relational models have some disadvantages in measuring the correlation between categorical data sequences.To this end,this paper introduces a new grey relational model to analyze heterogeneous data.In this study,a set of security risk factors for small reservoirs was first constructed based on theoretical analysis,and heterogeneous data of these factors were recorded as sequences.The sequences were regarded as random variables,and the information entropy and conditional entropy between sequences were measured to analyze the relational degree between risk factors.Then,a new grey relational analysis model for heterogeneous data was constructed,and a comprehensive security risk factor identification method was developed.A case study of small reservoirs in Guangxi Zhuang Autonomous Region in China shows that the model constructed in this study is applicable to security risk factor identification for small reservoirs with heterogeneous and sparse data.展开更多
目的了解广西地区猪、鼠、狗、猕猴和鱼5种动物戌型肝炎病毒(HEV)基因型和亚型分布。方法对广西地区猪、鼠、狗HEV抗体阳性血清170份,鼠肝组织150份,3月龄以下狗粪便标本80份,鱼胆汁标本120份,3月龄以下猪粪便标本129份,龙虎山自然景...目的了解广西地区猪、鼠、狗、猕猴和鱼5种动物戌型肝炎病毒(HEV)基因型和亚型分布。方法对广西地区猪、鼠、狗HEV抗体阳性血清170份,鼠肝组织150份,3月龄以下狗粪便标本80份,鱼胆汁标本120份,3月龄以下猪粪便标本129份,龙虎山自然景区猴粪便标本130份,用巢式逆转录聚合酶链反应法(RT-nPCR)检测戊型肝炎病毒核糖核酸(HEV RNA),对RT-nPCR阳性扩增产物进行克隆测序,用Vector NTI Suite 9.0和Treeview软件与目前新分型方法所选参考序列进行核苷酸序列相似性比较和生物进化树分析。结果广西地区170份猪、鼠和狗血清HEV RNA检测均为阴性。在150份鼠肝组织,120份鱼胆汁标本,80份狗和130份猕猴粪便标本中均未检出HEV RNA;3月龄以下猪粪便标本HEV RNA阳性率10.08(13/129)。对13株猪HEV开放读码框架(ORF)1区部分核酸序列进行分析,其与Ⅰ、Ⅱ、Ⅲ和Ⅳ型HEV的相似性分别为73%~77%,76%~79%,76%~81%,82%~97%;与6个亚型的相似分别为4a:82%~94%;4b:82%~98%;4c:82%~87%;4d:81%~87%;4f:84%~86%;4g:81%~84%,其中2株与Ⅳa亚型相似性是高为82%~94%,11株与Ⅳb亚型相似性最高为82%~98%。结论广西地区猪HEV均为基因型4,2株属于基因型Ⅳa,Ⅱ株为Ⅳb。HEV在猪、鼠、狗血清、鼠肝组织、鱼胆汁、狗和猕猴粪便标本中均未检出。展开更多
基金Supported by the Ocean Public Welfare Scientific Research Project,State Oceanic Administration People’s Republic of China(2010050012)~~
文摘Rare animals and the main distribution areas in Guangxi Beibu Gulf were listed by data collection and local visiting in Guangxi Beibu Gulf, and status quo of Chinese White Dolphins was analyzed in terms of distribution area, the amount of resources and environmental pressures. Furthermore, it was proposed that marine pollution, habitat loss and human fishing result in the most serious damages on rare animals and it is urgent to take countermeasures.
基金Supported by Sino-German Cooperation Program(PPP[2008]3086)
文摘[Objective] The aim was to assess the status quo of animal and plant resources in Turks River after the construction of the reservoir.[Method] Through field investigation,document check and sample identification,the distribution of animal and plants resources in Turks River after the construction of the reservoir was studied and corresponding protection measures were proposed.[Result] Under the influence of reservoir,there were fifteen types of rare animals,one species of national primary protected animals,seven species of national secondary protected animals,one species of provincial primary protected animals,six species of provincial secondary protected animals;there were twenty one species of rare plants,including two species of national secondary plant,five species of national tertiary protected animals,six types of Xinjiang primary protected plants,two species of Xinjiang secondary protected plants and six types of tertiary protected plants in Xinjiang.Protective policies for the land ecological environment were proposed,including corresponding compensation according to the rules and policies of government,plans being formulated for rare species protection,construction of natural reserves and artificial breeding base,usage of the environment in the reservoir and changes of ecological situation etc.[Conclusion] The study provided basis for the protection of animal and plants resources in Turks.
基金National Key Research and Development Project of China,Grant/Award Number:2016YFD0500304CAMS Innovation Fund for Medical Sciences,Grant/Award Number:NO.2016-I2M-1-014\2016-12M-006the Chinese National Major S&T Project,Grant/Award Number:NO.2017ZX10304402-001-003
文摘In humans, infection with the coronavirus, especially the severe acute respiratory syndrome coronavirus(SARS-CoV) and the emerging Middle East respiratory syndrome coronavirus(MERS-CoV), induces acute respiratory failure, resulting in high mortality. Irregular coronavirus related epidemics indicate that the evolutionary origins of these two pathogens need to be identified urgently and there are still questions related to suitable laboratory animal models. Thus, in this review we aim to highlight key discoveries concerning the animal origin of the virus and summarize and compare current animal models.
基金supported by the National Nature Science Foundation of China(Grant No.71401052)the National Social Science Foundation of China(Grant No.17BGL156)the Key Project of the National Social Science Foundation of China(Grant No.14AZD024)
文摘Identification of security risk factors for small reservoirs is the basis for implementation of early warning systems.The manner of identification of the factors for small reservoirs is of practical significance when data are incomplete.The existing grey relational models have some disadvantages in measuring the correlation between categorical data sequences.To this end,this paper introduces a new grey relational model to analyze heterogeneous data.In this study,a set of security risk factors for small reservoirs was first constructed based on theoretical analysis,and heterogeneous data of these factors were recorded as sequences.The sequences were regarded as random variables,and the information entropy and conditional entropy between sequences were measured to analyze the relational degree between risk factors.Then,a new grey relational analysis model for heterogeneous data was constructed,and a comprehensive security risk factor identification method was developed.A case study of small reservoirs in Guangxi Zhuang Autonomous Region in China shows that the model constructed in this study is applicable to security risk factor identification for small reservoirs with heterogeneous and sparse data.
文摘目的了解广西地区猪、鼠、狗、猕猴和鱼5种动物戌型肝炎病毒(HEV)基因型和亚型分布。方法对广西地区猪、鼠、狗HEV抗体阳性血清170份,鼠肝组织150份,3月龄以下狗粪便标本80份,鱼胆汁标本120份,3月龄以下猪粪便标本129份,龙虎山自然景区猴粪便标本130份,用巢式逆转录聚合酶链反应法(RT-nPCR)检测戊型肝炎病毒核糖核酸(HEV RNA),对RT-nPCR阳性扩增产物进行克隆测序,用Vector NTI Suite 9.0和Treeview软件与目前新分型方法所选参考序列进行核苷酸序列相似性比较和生物进化树分析。结果广西地区170份猪、鼠和狗血清HEV RNA检测均为阴性。在150份鼠肝组织,120份鱼胆汁标本,80份狗和130份猕猴粪便标本中均未检出HEV RNA;3月龄以下猪粪便标本HEV RNA阳性率10.08(13/129)。对13株猪HEV开放读码框架(ORF)1区部分核酸序列进行分析,其与Ⅰ、Ⅱ、Ⅲ和Ⅳ型HEV的相似性分别为73%~77%,76%~79%,76%~81%,82%~97%;与6个亚型的相似分别为4a:82%~94%;4b:82%~98%;4c:82%~87%;4d:81%~87%;4f:84%~86%;4g:81%~84%,其中2株与Ⅳa亚型相似性是高为82%~94%,11株与Ⅳb亚型相似性最高为82%~98%。结论广西地区猪HEV均为基因型4,2株属于基因型Ⅳa,Ⅱ株为Ⅳb。HEV在猪、鼠、狗血清、鼠肝组织、鱼胆汁、狗和猕猴粪便标本中均未检出。