The present study investigated the possible changes in the mixis potential of rotifer resting eggs produced by a single stock of Brachionus plicatilis and collected and preserved annually from 1985-1998. Several clone...The present study investigated the possible changes in the mixis potential of rotifer resting eggs produced by a single stock of Brachionus plicatilis and collected and preserved annually from 1985-1998. Several clones derived from each batch of resting eggs were cultured under the same conditions for 21 days. The percentage of clones appearing resting eggs and the average yield of resting eggs produced from each clone were recorded and statistically analyzed to find the differences between the mixis potential of those resting egg batches. Results showed that different batches of resting eggs had different mictic levels among their descendent clones; but no regular relationship was found between the mixis potential of resting eggs and their collection times/preservation periods. Several internal and external factors that might affect the mixis potential of resting eggs were discussed.展开更多
The purpose of this study was to analyse and compare the match characteristics of wheelchair PTT （Para table tennis） classes that played in the team tournament at the Rio 2016 Paralympic. Eight PTT matches of each s...The purpose of this study was to analyse and compare the match characteristics of wheelchair PTT （Para table tennis） classes that played in the team tournament at the Rio 2016 Paralympic. Eight PTT matches of each selected class （1, 2, 4 and 5） were analysed.The variables analysed were DR （duration of rally） and RT （rest time）. In observing the characteristics of the matches in Classes 1, 2, 4 and 5, the DR corresponded to 3.4 ± 1.2, 4.2 ± 1.5, 4.5 ± 1.6 and 5.2 ± 1.2 seconds, and RT to 13.8 ± 3.5, 14 ± 3.5, 13.3 ± 3.1 and 12.3± 3.3 seconds. In Classes 1 and 2, significant differences in DR were found, but none in RT （p 〉 0.05）. In the DR and RT of classes 4 and 5 there were significant differences （p 〈 0.05）. The results indicated that the DR in Classes 1 and 2 were different because of sitting balance due to severe reduction of function in Class 1 playing arm, interfering in the rally and rest. In Classes 4 and 5 the differences in DR and RT were caused by little sitting balance in Class 4. These characteristics should be used by coaches to check the disadvantages that Class 1 presents against Class 2, and the physical limitations of Class 4 that can directly influence DR in the team tournament against athletes with normal trunk muscle function （Class 5）. Planned training prescriptions between classes would aim at achieving better sport performance in training and team tournaments.展开更多
目的探讨全髋关节置换(Total hip arthroplasty,THA)术后下肢深静脉血栓形成(Lower extremity deep vein thrombosis,DVT)的影响因素及其预防措施。方法选择2020年1月至2022年7月在本院行THA治疗的88例作为研究对象,分析术后DVT发生的...目的探讨全髋关节置换(Total hip arthroplasty,THA)术后下肢深静脉血栓形成(Lower extremity deep vein thrombosis,DVT)的影响因素及其预防措施。方法选择2020年1月至2022年7月在本院行THA治疗的88例作为研究对象,分析术后DVT发生的影响因素。结果88例THA患者术后发生DVT 33例(37.50%),其余55例(62.50%)患者未发生DVT;单因素分析显示,年龄、假体类型、术中出血量、手术用时、术后卧床时间与THA患者术后DVT发生有关,差异有统计学意义(P<0.05);多因素分析显示,年龄≥60岁、骨水泥型假体、术中出血量>400mL、手术用时>4h、术后卧床时间>4d是THA患者术后DVT发生的高危因素(P<0.05)。结论THA患者术后DVT发生与年龄、假体类型、术中出血量、手术用时、术后卧床时间有关,针对各因素制定相应的预防对策干预,可能减少DVT发生。展开更多
文摘The present study investigated the possible changes in the mixis potential of rotifer resting eggs produced by a single stock of Brachionus plicatilis and collected and preserved annually from 1985-1998. Several clones derived from each batch of resting eggs were cultured under the same conditions for 21 days. The percentage of clones appearing resting eggs and the average yield of resting eggs produced from each clone were recorded and statistically analyzed to find the differences between the mixis potential of those resting egg batches. Results showed that different batches of resting eggs had different mictic levels among their descendent clones; but no regular relationship was found between the mixis potential of resting eggs and their collection times/preservation periods. Several internal and external factors that might affect the mixis potential of resting eggs were discussed.
文摘The purpose of this study was to analyse and compare the match characteristics of wheelchair PTT （Para table tennis） classes that played in the team tournament at the Rio 2016 Paralympic. Eight PTT matches of each selected class （1, 2, 4 and 5） were analysed.The variables analysed were DR （duration of rally） and RT （rest time）. In observing the characteristics of the matches in Classes 1, 2, 4 and 5, the DR corresponded to 3.4 ± 1.2, 4.2 ± 1.5, 4.5 ± 1.6 and 5.2 ± 1.2 seconds, and RT to 13.8 ± 3.5, 14 ± 3.5, 13.3 ± 3.1 and 12.3± 3.3 seconds. In Classes 1 and 2, significant differences in DR were found, but none in RT （p 〉 0.05）. In the DR and RT of classes 4 and 5 there were significant differences （p 〈 0.05）. The results indicated that the DR in Classes 1 and 2 were different because of sitting balance due to severe reduction of function in Class 1 playing arm, interfering in the rally and rest. In Classes 4 and 5 the differences in DR and RT were caused by little sitting balance in Class 4. These characteristics should be used by coaches to check the disadvantages that Class 1 presents against Class 2, and the physical limitations of Class 4 that can directly influence DR in the team tournament against athletes with normal trunk muscle function （Class 5）. Planned training prescriptions between classes would aim at achieving better sport performance in training and team tournaments.
文摘目的探讨全髋关节置换(Total hip arthroplasty,THA)术后下肢深静脉血栓形成(Lower extremity deep vein thrombosis,DVT)的影响因素及其预防措施。方法选择2020年1月至2022年7月在本院行THA治疗的88例作为研究对象,分析术后DVT发生的影响因素。结果88例THA患者术后发生DVT 33例(37.50%),其余55例(62.50%)患者未发生DVT;单因素分析显示,年龄、假体类型、术中出血量、手术用时、术后卧床时间与THA患者术后DVT发生有关,差异有统计学意义(P<0.05);多因素分析显示,年龄≥60岁、骨水泥型假体、术中出血量>400mL、手术用时>4h、术后卧床时间>4d是THA患者术后DVT发生的高危因素(P<0.05)。结论THA患者术后DVT发生与年龄、假体类型、术中出血量、手术用时、术后卧床时间有关,针对各因素制定相应的预防对策干预,可能减少DVT发生。
