Salinity is a significant environmental factor that can affect the survival,metamorphosis,growth and feeding of Portunus trituberculatus.In order to analyze the key physiological characteristics of P.trituberculatus i...Salinity is a significant environmental factor that can affect the survival,metamorphosis,growth and feeding of Portunus trituberculatus.In order to analyze the key physiological characteristics of P.trituberculatus in response to short-term low salinity stress,the experiments of gradually decline and recovery as well as abrupt decline in salinity were carried out.The results showed that P.trituberculatus could survive in a certain low salinity range in the short term,and salinity 12 was the lowest tolerable salinity under the present experimental conditions.The change of the hemolymph osmotic pressure displayed significant positive correlations with water salinity,and the pressure was always higher than seawater osmotic pressure.Short-term low salinity stress changed the structure and morphology of gill tissue.The expansion of gill filament ends and epithelial cell shedding were conducive to osmotic adjustment.The activities of key ion transport enzymes such as Na^(+)-K^(+)-ATPase,carbonic anhydrase and V-ATPase also changed with the osmotic regulation,while Na^(+)-K^(+)-ATPase played a dominant role.In summary,as an osmotic adjustment species,P.trituberculatus rapidly adapt to the short-term low-salinity environment by osmotic adjustment in vivo,but salinity below salinity 12 is not conducive to its survival.Our result enriched the theoretical mechanism of osmotic regulation of P.trituberculatus,providing reference for the development of aquaculture technology of P.trituberculatus.展开更多
目的:使用网状Meta分析比较不同导尿方式在神经源性膀胱病人中的应用效果。方法:系统检索PubMed、Cochrane Library、EMbase、Web of Science、中国生物医学文献数据库、万方数据库、中国知网、维普资讯网等中英文数据库以及北美临床试...目的:使用网状Meta分析比较不同导尿方式在神经源性膀胱病人中的应用效果。方法:系统检索PubMed、Cochrane Library、EMbase、Web of Science、中国生物医学文献数据库、万方数据库、中国知网、维普资讯网等中英文数据库以及北美临床试验注册中心、世界卫生组织国际临床试验注册平台、中国临床试验注册中心等临床试验注册平台中有关不同导尿方式在神经源性膀胱病人中应用效果的随机对照试验,检索时限为从建库到2021年9月30日。由2名研究者独立筛选文献、提取资料并评估偏倚风险后,采用Stata 15和RStudio软件进行网状Meta分析。结果:共纳入29项随机对照试验,网状Meta分析结果显示,与留置导尿相比,无菌间歇导尿[OR=0.13,95%CI(0.08,0.21)]、清洁间歇导尿[OR=0.17,95%CI(0.12,0.24)]、无接触式间歇导尿[OR=0.13,95%CI(0.05,0.36)]均能降低尿路感染发生率;清洁间歇导尿能够有效降低尿路结石发生率[OR=0.11,95%CI(0.03,0.39)];无菌间歇导尿[MD=-105.16,95%CI(-130.60,-79.72)]、清洁间歇导尿[MD=-77.61,95%CI(-98.83,-56.39)]均能减少残余尿量;无菌间歇导尿[MD=70.65,95%CI(5.04,136.27)]、清洁间歇导尿[MD=81.58,95%CI(29.33,133.82)]均能改善病人膀胱容量;无菌间歇导尿[MD=12.00,95%CI(6.81,17.20)]、清洁间歇导尿[MD=11.14,95%CI(7.94,14.34)]均能促进病人膀胱压力恢复。结论:当前证据表明,无菌间歇导尿与清洁间歇导尿在减少并发症发生、促进膀胱功能恢复方面效果较佳。但受文献质量和数量影响,还需要更多高质量、大样本研究予以验证。展开更多
基金supported by the National Key R&D Pro-gram of China(No.2020YFD0900203)the China Agricul-ture Research System of MOF and MARAthe K.C.Wong Magna Fund in Ningbo University。
文摘Salinity is a significant environmental factor that can affect the survival,metamorphosis,growth and feeding of Portunus trituberculatus.In order to analyze the key physiological characteristics of P.trituberculatus in response to short-term low salinity stress,the experiments of gradually decline and recovery as well as abrupt decline in salinity were carried out.The results showed that P.trituberculatus could survive in a certain low salinity range in the short term,and salinity 12 was the lowest tolerable salinity under the present experimental conditions.The change of the hemolymph osmotic pressure displayed significant positive correlations with water salinity,and the pressure was always higher than seawater osmotic pressure.Short-term low salinity stress changed the structure and morphology of gill tissue.The expansion of gill filament ends and epithelial cell shedding were conducive to osmotic adjustment.The activities of key ion transport enzymes such as Na^(+)-K^(+)-ATPase,carbonic anhydrase and V-ATPase also changed with the osmotic regulation,while Na^(+)-K^(+)-ATPase played a dominant role.In summary,as an osmotic adjustment species,P.trituberculatus rapidly adapt to the short-term low-salinity environment by osmotic adjustment in vivo,but salinity below salinity 12 is not conducive to its survival.Our result enriched the theoretical mechanism of osmotic regulation of P.trituberculatus,providing reference for the development of aquaculture technology of P.trituberculatus.
文摘目的:使用网状Meta分析比较不同导尿方式在神经源性膀胱病人中的应用效果。方法:系统检索PubMed、Cochrane Library、EMbase、Web of Science、中国生物医学文献数据库、万方数据库、中国知网、维普资讯网等中英文数据库以及北美临床试验注册中心、世界卫生组织国际临床试验注册平台、中国临床试验注册中心等临床试验注册平台中有关不同导尿方式在神经源性膀胱病人中应用效果的随机对照试验,检索时限为从建库到2021年9月30日。由2名研究者独立筛选文献、提取资料并评估偏倚风险后,采用Stata 15和RStudio软件进行网状Meta分析。结果:共纳入29项随机对照试验,网状Meta分析结果显示,与留置导尿相比,无菌间歇导尿[OR=0.13,95%CI(0.08,0.21)]、清洁间歇导尿[OR=0.17,95%CI(0.12,0.24)]、无接触式间歇导尿[OR=0.13,95%CI(0.05,0.36)]均能降低尿路感染发生率;清洁间歇导尿能够有效降低尿路结石发生率[OR=0.11,95%CI(0.03,0.39)];无菌间歇导尿[MD=-105.16,95%CI(-130.60,-79.72)]、清洁间歇导尿[MD=-77.61,95%CI(-98.83,-56.39)]均能减少残余尿量;无菌间歇导尿[MD=70.65,95%CI(5.04,136.27)]、清洁间歇导尿[MD=81.58,95%CI(29.33,133.82)]均能改善病人膀胱容量;无菌间歇导尿[MD=12.00,95%CI(6.81,17.20)]、清洁间歇导尿[MD=11.14,95%CI(7.94,14.34)]均能促进病人膀胱压力恢复。结论:当前证据表明,无菌间歇导尿与清洁间歇导尿在减少并发症发生、促进膀胱功能恢复方面效果较佳。但受文献质量和数量影响,还需要更多高质量、大样本研究予以验证。
