目的:评估主动脉瓣狭窄(AS)患者经导管主动脉瓣置换(TAVR)术前及术后室性心律失常(VAs)发生率。方法:连续收集自2018年1月1日-2019年12月31日在武汉亚洲心脏病医院接受TAVR治疗的症状性重度AS患者81例,排除TAVR术前存在永久起搏器植入...目的:评估主动脉瓣狭窄(AS)患者经导管主动脉瓣置换(TAVR)术前及术后室性心律失常(VAs)发生率。方法:连续收集自2018年1月1日-2019年12月31日在武汉亚洲心脏病医院接受TAVR治疗的症状性重度AS患者81例,排除TAVR术前存在永久起搏器植入病史、术后因并发症植入永久起搏器、术后30 d内死亡、术前无24 h Holter检查结果及失访的患者共14例,最终67例患者纳入分析。TAVR术前及术后1个月行24 h Holter观察VAs的发生情况。VAs分类依据改良的Lown分级系统。结果:TAVR术前VAs Lown分级为1~2级40例(59.7%),3~4级23例(34.3%)。TAVR术后1个月,VAs 1~2级人群占比升高,但差异无统计学意义(P>0.05)。3~4级人群比例显著降低(P<0.05)。其中,室性心动过速(VT)的发生率从11.9%下降至7.5%,但差异无统计学意义(P>0.05)。结论:VAs常见于AS人群中,TAVR术后1个月严重VAs(改良Lown分级3~4级)的患者比例显著降低,可能与瓣膜置换术后左心室功能改善有关。展开更多
The interpretation of The Story of an Hour has been a heated topic in literature study. Many people believeitcriticizes the oppressionon female from male society. However, this paper holds that, from the perspective o...The interpretation of The Story of an Hour has been a heated topic in literature study. Many people believeitcriticizes the oppressionon female from male society. However, this paper holds that, from the perspective of New Criticism, a work should be interpreted based on the text.Therefore,thispapersuggests the story is about the confusion between freedom and fetter and deals with the subtle and complicated living status of human being.展开更多
This study aimed to understand the growing development and physiological characteristics of seeds harvested different days after pollination and the seedlings emerged from the seeds of yellow-seeded Brassica napus L.....This study aimed to understand the growing development and physiological characteristics of seeds harvested different days after pollination and the seedlings emerged from the seeds of yellow-seeded Brassica napus L..Two yellow-seeded cultivars‘Hongyuan 558’and‘Qinyou 806’were selected in this study,and 50 seeds were collected 30,35,and 40 d after pollination,respectively.The seeds were weighed and placed on filter paper for hydroponic experiments.The seed germination rate was determined 3-5 d later.The physiological indicators including superoxide dismutase(SOD),peroxidase(POD),and catalase(CAT)activities and malondialdehyde(MDA)content were measured for the seeds harvested different days after pollination and the 7-day-seedlings emerged from the seeds.The results showed that the seed dry weights and germination rates of both‘Qinyou 806’and‘Hongyuan 558’increased as the days after pollination increased,especially 30-35 d after pollination.The germination rate and dry and fresh weights of the seeds showed no significant differences between the two cultivars,and almost all the seeds germinated 40 d after pollination.As the days after pollination increased,the SOD activities in the seeds of both cultivars first increased and then decreased,reaching their peaks 35 d after pollination,which may be related to encountering adverse stress.The POD activity in the seeds of‘Qinyou 806’kept declining,and that of‘Hongyuan 558’first increased and then decreased,which may be related to the antioxidant mechanism and adaptive regulation.The CAT activities in the seeds of both cultivars first decreased and then increased.The MDA content in the seeds of‘Qinyou 806’first decreased and then increased,while that of‘Hongyuan 558’kept reducing and was the highest in the seeds 30 d after pollination,which indicated‘Hongyuan 558’was mildly affected by the environment and had strong resistance.The activities of SOD and POD in the seedlings of two cultivars that were emerged from the seeds 35-40 d after pollination became weakened,which may be related to their exposure to stress.The CAT activity in the seedlings of‘Hongyuan 558’was generally higher than that of‘Qinyou 806’,indicating that‘Hongyuan 558’had stronger stress resistance.The MDA content in the seedlings emerged from the seeds 35-40 d after pollination showed a decreasing trend,indicating that the seedlings emerged from the seeds harvested at this stage had mild cell membrane damage and enhanced stress resistance.In conclusion,‘Hongyuan 558’had strong environmental adaptability and stress resistance.展开更多
文摘目的:评估主动脉瓣狭窄(AS)患者经导管主动脉瓣置换(TAVR)术前及术后室性心律失常(VAs)发生率。方法:连续收集自2018年1月1日-2019年12月31日在武汉亚洲心脏病医院接受TAVR治疗的症状性重度AS患者81例,排除TAVR术前存在永久起搏器植入病史、术后因并发症植入永久起搏器、术后30 d内死亡、术前无24 h Holter检查结果及失访的患者共14例,最终67例患者纳入分析。TAVR术前及术后1个月行24 h Holter观察VAs的发生情况。VAs分类依据改良的Lown分级系统。结果:TAVR术前VAs Lown分级为1~2级40例(59.7%),3~4级23例(34.3%)。TAVR术后1个月,VAs 1~2级人群占比升高,但差异无统计学意义(P>0.05)。3~4级人群比例显著降低(P<0.05)。其中,室性心动过速(VT)的发生率从11.9%下降至7.5%,但差异无统计学意义(P>0.05)。结论:VAs常见于AS人群中,TAVR术后1个月严重VAs(改良Lown分级3~4级)的患者比例显著降低,可能与瓣膜置换术后左心室功能改善有关。
文摘The interpretation of The Story of an Hour has been a heated topic in literature study. Many people believeitcriticizes the oppressionon female from male society. However, this paper holds that, from the perspective of New Criticism, a work should be interpreted based on the text.Therefore,thispapersuggests the story is about the confusion between freedom and fetter and deals with the subtle and complicated living status of human being.
基金Supported by Major Project of Agricultural Biological Breeding(2023ZD0404205)Science and Technology Plan Project of Changsha City(kq2107016)。
文摘This study aimed to understand the growing development and physiological characteristics of seeds harvested different days after pollination and the seedlings emerged from the seeds of yellow-seeded Brassica napus L..Two yellow-seeded cultivars‘Hongyuan 558’and‘Qinyou 806’were selected in this study,and 50 seeds were collected 30,35,and 40 d after pollination,respectively.The seeds were weighed and placed on filter paper for hydroponic experiments.The seed germination rate was determined 3-5 d later.The physiological indicators including superoxide dismutase(SOD),peroxidase(POD),and catalase(CAT)activities and malondialdehyde(MDA)content were measured for the seeds harvested different days after pollination and the 7-day-seedlings emerged from the seeds.The results showed that the seed dry weights and germination rates of both‘Qinyou 806’and‘Hongyuan 558’increased as the days after pollination increased,especially 30-35 d after pollination.The germination rate and dry and fresh weights of the seeds showed no significant differences between the two cultivars,and almost all the seeds germinated 40 d after pollination.As the days after pollination increased,the SOD activities in the seeds of both cultivars first increased and then decreased,reaching their peaks 35 d after pollination,which may be related to encountering adverse stress.The POD activity in the seeds of‘Qinyou 806’kept declining,and that of‘Hongyuan 558’first increased and then decreased,which may be related to the antioxidant mechanism and adaptive regulation.The CAT activities in the seeds of both cultivars first decreased and then increased.The MDA content in the seeds of‘Qinyou 806’first decreased and then increased,while that of‘Hongyuan 558’kept reducing and was the highest in the seeds 30 d after pollination,which indicated‘Hongyuan 558’was mildly affected by the environment and had strong resistance.The activities of SOD and POD in the seedlings of two cultivars that were emerged from the seeds 35-40 d after pollination became weakened,which may be related to their exposure to stress.The CAT activity in the seedlings of‘Hongyuan 558’was generally higher than that of‘Qinyou 806’,indicating that‘Hongyuan 558’had stronger stress resistance.The MDA content in the seedlings emerged from the seeds 35-40 d after pollination showed a decreasing trend,indicating that the seedlings emerged from the seeds harvested at this stage had mild cell membrane damage and enhanced stress resistance.In conclusion,‘Hongyuan 558’had strong environmental adaptability and stress resistance.
