In order to provide the age for the ISEA (one reversed event in the CNS) a combined rock magnetic, pa-leomagnetic and geochronologic study has been conducted on two Cretaceous andesitic basalt lava flows from Sanbaoyi...In order to provide the age for the ISEA (one reversed event in the CNS) a combined rock magnetic, pa-leomagnetic and geochronologic study has been conducted on two Cretaceous andesitic basalt lava flows from Sanbaoying, Liaoning Province of northeastern China. Rock magnetic investigations show that pseudo-single domain (PSD) ti-tanomagnetite with poor-Ti content is the dominant mag-netic mineral in Sanbaoying lava flows. Detailed systematic thermal demagnetization allowed us to isolate two rema-nence components after removing a low temperature com-ponent at 100℃/150℃; an intermediate temperature com-ponent with normal polarity at 150℃/200℃—380℃/400℃ and the characteristic remanence component (ChRM) with reversed polarity above 400℃/450℃. 40Ar/39Ar dating results show that Sanbaoying rocks were erupted at 116.0±0.3 Ma. Combination of paleomagnetic results and 40Ar/39Ar dating indicates that the reversed event recorded in Sanbaoying lavas corresponds to the ISEA event in the CNS. Our age determination for ISEA reversed event provides chronologi-cal evidence to study the relevance between global geological events that occurred in the CNS and geodynamo processes.展开更多
目的了解城乡结合部医生心血管疾病急救的水平、培训状况及需求,探讨提高医生急救技能的方法。方法以"急救水平""心血管疾病""培训""城乡结合部""社区医生""first aid level/co...目的了解城乡结合部医生心血管疾病急救的水平、培训状况及需求,探讨提高医生急救技能的方法。方法以"急救水平""心血管疾病""培训""城乡结合部""社区医生""first aid level/condition""cardiovascular disease""training""Rural-urban fringe zone"为检索词,检索中国生物医学文献数据库、中国学术期刊全文数据库、万方知识服务平台、中国科技期刊全文数据库、Pub Med和Web of Science数据库,设计调查问卷。经分层随机抽样,对浦东城乡结合部某综合性医院及其辐射的6家社区医院的160名医生问卷调查。结果调查对象平均得分(14.42±2.39)分,总体正确率为72.1%。心血管疾病急救知识中掌握最差的是体外除颤仪的使用(52.5%),其次是心电图解读(54.0%)、急性心肌梗死的临床症状(61.0%)和心肺复苏的步骤(65.0%)。综合医院的得分高于社区医院(P<0.05),参加过培训且培训次数越多、培训方式有情景模拟的得分更高(P<0.05)。52.6%的调查对象选择未专门开展此项培训是影响参加心血管疾病急救培训的主要因素,98.1%的调查对象认为心血管疾病急救培训非常必要。结论浦东城乡结合部医生尤其是社区医生对心血管急救的掌握水平不容乐观,培训缺乏,需求很高。体外除颤仪普及程度很低,建议针对薄弱点建立有效培训体系。展开更多
文摘In order to provide the age for the ISEA (one reversed event in the CNS) a combined rock magnetic, pa-leomagnetic and geochronologic study has been conducted on two Cretaceous andesitic basalt lava flows from Sanbaoying, Liaoning Province of northeastern China. Rock magnetic investigations show that pseudo-single domain (PSD) ti-tanomagnetite with poor-Ti content is the dominant mag-netic mineral in Sanbaoying lava flows. Detailed systematic thermal demagnetization allowed us to isolate two rema-nence components after removing a low temperature com-ponent at 100℃/150℃; an intermediate temperature com-ponent with normal polarity at 150℃/200℃—380℃/400℃ and the characteristic remanence component (ChRM) with reversed polarity above 400℃/450℃. 40Ar/39Ar dating results show that Sanbaoying rocks were erupted at 116.0±0.3 Ma. Combination of paleomagnetic results and 40Ar/39Ar dating indicates that the reversed event recorded in Sanbaoying lavas corresponds to the ISEA event in the CNS. Our age determination for ISEA reversed event provides chronologi-cal evidence to study the relevance between global geological events that occurred in the CNS and geodynamo processes.
文摘目的了解城乡结合部医生心血管疾病急救的水平、培训状况及需求,探讨提高医生急救技能的方法。方法以"急救水平""心血管疾病""培训""城乡结合部""社区医生""first aid level/condition""cardiovascular disease""training""Rural-urban fringe zone"为检索词,检索中国生物医学文献数据库、中国学术期刊全文数据库、万方知识服务平台、中国科技期刊全文数据库、Pub Med和Web of Science数据库,设计调查问卷。经分层随机抽样,对浦东城乡结合部某综合性医院及其辐射的6家社区医院的160名医生问卷调查。结果调查对象平均得分(14.42±2.39)分,总体正确率为72.1%。心血管疾病急救知识中掌握最差的是体外除颤仪的使用(52.5%),其次是心电图解读(54.0%)、急性心肌梗死的临床症状(61.0%)和心肺复苏的步骤(65.0%)。综合医院的得分高于社区医院(P<0.05),参加过培训且培训次数越多、培训方式有情景模拟的得分更高(P<0.05)。52.6%的调查对象选择未专门开展此项培训是影响参加心血管疾病急救培训的主要因素,98.1%的调查对象认为心血管疾病急救培训非常必要。结论浦东城乡结合部医生尤其是社区医生对心血管急救的掌握水平不容乐观,培训缺乏,需求很高。体外除颤仪普及程度很低,建议针对薄弱点建立有效培训体系。