室内毒力测定表明,在控制美国白蛾幼虫有效药剂中,印楝素、天然除虫菊素和苦参碱的LD50分别为1.87μ/g、3.75μ/g和4.69μ/g;功夫菊酯、高效氯氰菊酯、氰戊菊酯的LD50分别为6.95μ/g、13.47μ/g和53.94μ/g。快速防治美国白蛾幼虫药剂...室内毒力测定表明,在控制美国白蛾幼虫有效药剂中,印楝素、天然除虫菊素和苦参碱的LD50分别为1.87μ/g、3.75μ/g和4.69μ/g;功夫菊酯、高效氯氰菊酯、氰戊菊酯的LD50分别为6.95μ/g、13.47μ/g和53.94μ/g。快速防治美国白蛾幼虫药剂适宜选择生物农药天然除虫菊和苦参碱,化学农药4.5%高氯EC、80%敌敌畏EC、40%灭多威EC;初期或虫口密度较低时,建议选择生物农药8000I U/g B T WP和仿生农药25%灭幼脲SC和5%氟铃脲EC。展开更多
Background: The objective of this study was to investigate the effects of footwear on posture and balance while walking. The types of footwear investigated in this study were open back shoes, commonly worn by hospital...Background: The objective of this study was to investigate the effects of footwear on posture and balance while walking. The types of footwear investigated in this study were open back shoes, commonly worn by hospitalized patients, and closed back shoes. Previous studies have shown that open back shoes, or slippers, increase the risk of falling (among elderly). We hypothesized that our findings would suggest that open back shoes negatively affect gait mechanics in healthy individuals. Methods: Healthy individuals (n = 12) participated in a walking test while wearing closed back shoes and open back shoes. The explanatory variables in this study were the analysis of gait, posture, and balance before and after walking. The objective variable was footwear (closed back shoes vs. open back shoes). A paired t-test was performed to detect significant differences between the two conditions. Results: Among the test items measured, we found a significant difference in minimum wide tilt angle and left-right differences in step length and intensity while walking between the conditions of closed back shoes and open back shoes. These results suggest that open back shoes could negatively impact posture and balance while walking, even in healthy subjects. Conclusion: It is imperative to improve patient awareness of the risk of falling. We believe that the inclusion of our findings in educational pamphlets and in-house notices could help improve patient awareness and more effectively prevent falls among patients.展开更多
This paper analyzed the consistency of some parameters of soils in the literature and experimental results from fall cone test and its application to soil plasticity classification.Over 500 data from both literatures ...This paper analyzed the consistency of some parameters of soils in the literature and experimental results from fall cone test and its application to soil plasticity classification.Over 500 data from both literatures and experiments using fall cone and Casagrande methods were compiled to assess the relationships among specified water content,cone penetration index ebT,and plasticity angle eaT of finegrained soils.The results indicate that no unique correlation exists among b,liquid limit of the fall cone test(LLc)and a.The water content at 1 mm cone penetration eC0T correlates well with b,plasticity ratio eRpT(i.e.the ratio of plastic limit to liquid limit),and a.Finally,the potential of using the btan a diagram to classify soil plasticity was also discussed.展开更多
目的:比较三种功能性移动能力测试工具在预测老年人跌倒危险方面的有效性。方法:116名老年人受试者参与本研究并分为跌倒组和非跌倒组。对受试者进行5次坐到站测试(five times sit to stand test,FTSST)、3m计时起立行走测试(timed up a...目的:比较三种功能性移动能力测试工具在预测老年人跌倒危险方面的有效性。方法:116名老年人受试者参与本研究并分为跌倒组和非跌倒组。对受试者进行5次坐到站测试(five times sit to stand test,FTSST)、3m计时起立行走测试(timed up and go test,TUGT)和计时10m步行测试(timed 10-meter walk test,TWT)。结果:跌倒组和非跌倒组的受试者在FTSST、TUGT和TWT之间的比较有显著差异(P<0.001)。Spearman相关分析结果均显示FTSST、TUGT和TWT与跌倒史之间显著相关(P<0.001)。Logistic回归分析显示FTSST、TUGT和TWT的时间与跌倒危险显著关联(OR:1.1643—1.2503)。接受者操作特征(ROC)曲线下的面积比较FTSST、TUGT和TWT之间无显著性差异(P>0.05),并且三种测试工具可以显著预测跌倒危险(AUC:0.68—0.73,P<0.001)。结论:FTSST、TUGT和TWT作为简便、快捷的功能性测试工具可以有效预测老年人跌倒危险。展开更多
文摘室内毒力测定表明,在控制美国白蛾幼虫有效药剂中,印楝素、天然除虫菊素和苦参碱的LD50分别为1.87μ/g、3.75μ/g和4.69μ/g;功夫菊酯、高效氯氰菊酯、氰戊菊酯的LD50分别为6.95μ/g、13.47μ/g和53.94μ/g。快速防治美国白蛾幼虫药剂适宜选择生物农药天然除虫菊和苦参碱,化学农药4.5%高氯EC、80%敌敌畏EC、40%灭多威EC;初期或虫口密度较低时,建议选择生物农药8000I U/g B T WP和仿生农药25%灭幼脲SC和5%氟铃脲EC。
文摘Background: The objective of this study was to investigate the effects of footwear on posture and balance while walking. The types of footwear investigated in this study were open back shoes, commonly worn by hospitalized patients, and closed back shoes. Previous studies have shown that open back shoes, or slippers, increase the risk of falling (among elderly). We hypothesized that our findings would suggest that open back shoes negatively affect gait mechanics in healthy individuals. Methods: Healthy individuals (n = 12) participated in a walking test while wearing closed back shoes and open back shoes. The explanatory variables in this study were the analysis of gait, posture, and balance before and after walking. The objective variable was footwear (closed back shoes vs. open back shoes). A paired t-test was performed to detect significant differences between the two conditions. Results: Among the test items measured, we found a significant difference in minimum wide tilt angle and left-right differences in step length and intensity while walking between the conditions of closed back shoes and open back shoes. These results suggest that open back shoes could negatively impact posture and balance while walking, even in healthy subjects. Conclusion: It is imperative to improve patient awareness of the risk of falling. We believe that the inclusion of our findings in educational pamphlets and in-house notices could help improve patient awareness and more effectively prevent falls among patients.
文摘This paper analyzed the consistency of some parameters of soils in the literature and experimental results from fall cone test and its application to soil plasticity classification.Over 500 data from both literatures and experiments using fall cone and Casagrande methods were compiled to assess the relationships among specified water content,cone penetration index ebT,and plasticity angle eaT of finegrained soils.The results indicate that no unique correlation exists among b,liquid limit of the fall cone test(LLc)and a.The water content at 1 mm cone penetration eC0T correlates well with b,plasticity ratio eRpT(i.e.the ratio of plastic limit to liquid limit),and a.Finally,the potential of using the btan a diagram to classify soil plasticity was also discussed.
文摘目的:比较三种功能性移动能力测试工具在预测老年人跌倒危险方面的有效性。方法:116名老年人受试者参与本研究并分为跌倒组和非跌倒组。对受试者进行5次坐到站测试(five times sit to stand test,FTSST)、3m计时起立行走测试(timed up and go test,TUGT)和计时10m步行测试(timed 10-meter walk test,TWT)。结果:跌倒组和非跌倒组的受试者在FTSST、TUGT和TWT之间的比较有显著差异(P<0.001)。Spearman相关分析结果均显示FTSST、TUGT和TWT与跌倒史之间显著相关(P<0.001)。Logistic回归分析显示FTSST、TUGT和TWT的时间与跌倒危险显著关联(OR:1.1643—1.2503)。接受者操作特征(ROC)曲线下的面积比较FTSST、TUGT和TWT之间无显著性差异(P>0.05),并且三种测试工具可以显著预测跌倒危险(AUC:0.68—0.73,P<0.001)。结论:FTSST、TUGT和TWT作为简便、快捷的功能性测试工具可以有效预测老年人跌倒危险。
