Pest damage is a significant factor that cuts agricultural production, and cultivation of pest-resistant varieties is the most economic and effective approach of controlling pest damage. Plant pest resistance includes...Pest damage is a significant factor that cuts agricultural production, and cultivation of pest-resistant varieties is the most economic and effective approach of controlling pest damage. Plant pest resistance includes antixenosis, antibiosis, and tolerance. Current popular methods for the genetic improvement of crop pest resistance are traditional breeding method, transgenic breeding, and molecular mark-assisted breeding. This paper introduced major mechanisms and genetic bases of plant pest resistance, ＂and reviewed research progress of domestic and international genetic improvement of plant pest resistance, analyzed the problems and its de- velopment prospects.展开更多
目的探讨尿管腹部外固定法在前列腺绿激光汽化术(greenlight photoselective vaporization of the prostate,PVP)后患者的应用效果。方法采用目的抽样法,选取行PVP患者172例,对照组83例,观察组89例。对照组术后尿管给予常规大腿外侧上1/...目的探讨尿管腹部外固定法在前列腺绿激光汽化术(greenlight photoselective vaporization of the prostate,PVP)后患者的应用效果。方法采用目的抽样法,选取行PVP患者172例,对照组83例,观察组89例。对照组术后尿管给予常规大腿外侧上1/3外固定法,观察组术后尿管采用腹部外固定法。比较2组活动后尿液颜色改变的发生率、留置尿管期间的满意度及尿管外固定装置的牢固性。结果观察组活动后尿液颜色变红改变的发生率明显低于对照组,观察组患者留置尿管期间在舒适度、方便度、保护隐私方面的满意度及满意度总分均高于对照组,观察组尿管外固定装置的牢固性优于对照组,差异均有统计学意义(P<0.05)。结论PVP术后尿管固定于腹部可减少患者活动后出血的发生率,促进康复,提高留置尿管期间的满意度,值得临床推广。展开更多
目的监测舰艇在遭受水下非接触爆炸冲击试验过程中所受冲击作用大小及舰员的生理参数变化,为实船水下爆炸冲击试验的安全防护提供依据。方法在水面舰艇遭受水下1 000 kg TNT当量的沉底水雷相距100 m的非接触爆炸冲击作用时,利用动态多...目的监测舰艇在遭受水下非接触爆炸冲击试验过程中所受冲击作用大小及舰员的生理参数变化,为实船水下爆炸冲击试验的安全防护提供依据。方法在水面舰艇遭受水下1 000 kg TNT当量的沉底水雷相距100 m的非接触爆炸冲击作用时,利用动态多参数生理记录检测仪(简称生参仪)对处在舰艇不同位置的9名舰员和1名模拟假人进行生理指标(心电图、心率、呼吸率、体表温度)及两轴向加速度值(Gz、Gy)监测记录;假人只监测Gz、Gy值。同时在舰艇内多个部位安放生参仪检测盒,监测记录舰体所受冲击力的大小。结果人体表心脏水平所受冲击力Gz值为(0.23～2.17)G,Gy值为(-0.39～0.66)G,在人体可承受的范围内。假人体胸部所受冲击力Gz值为(0.13～1.92)G,Gy值为(-0.42～0.85)G,高于同一位置的真人体。舰体所受Gz值为(3.41～>9)G～(-2.90～-5.45)G;Gy值为(0.91～2.98)G～(-0.49～-1.82)G,明显高于人体所受的冲击强度。爆炸前、后舰员的心率及呼吸率明显增快,爆炸前最快心率(107～171)次/min,最快呼吸率(22～29)次/min;爆炸后最快心率(113～155)次/min,最快呼吸率(24～33)次/min,爆炸后30 min内平均心率和平均呼吸率均高于爆炸前,平均心率前后对比有统计学意义(t=2.929,P=0.019)。体表温度爆炸前后无明显变化。爆炸过程中没有发生人体损伤。结论水下爆炸冲击试验对人体自主神经功能有较大影响,本试验中舰员所受冲击作用强度及生理参数变化在安全范围内。展开更多
基金Sponsored by Special Fund for Modern Agricultural Industry Technology System(CARS-09)Jiangsu Provincial Scientific and Technological Support Program(BE2013305)Program of Nantong Scientific and Technological Bureau(H2012014)
文摘Pest damage is a significant factor that cuts agricultural production, and cultivation of pest-resistant varieties is the most economic and effective approach of controlling pest damage. Plant pest resistance includes antixenosis, antibiosis, and tolerance. Current popular methods for the genetic improvement of crop pest resistance are traditional breeding method, transgenic breeding, and molecular mark-assisted breeding. This paper introduced major mechanisms and genetic bases of plant pest resistance, ＂and reviewed research progress of domestic and international genetic improvement of plant pest resistance, analyzed the problems and its de- velopment prospects.
文摘目的探讨尿管腹部外固定法在前列腺绿激光汽化术(greenlight photoselective vaporization of the prostate,PVP)后患者的应用效果。方法采用目的抽样法,选取行PVP患者172例,对照组83例,观察组89例。对照组术后尿管给予常规大腿外侧上1/3外固定法,观察组术后尿管采用腹部外固定法。比较2组活动后尿液颜色改变的发生率、留置尿管期间的满意度及尿管外固定装置的牢固性。结果观察组活动后尿液颜色变红改变的发生率明显低于对照组,观察组患者留置尿管期间在舒适度、方便度、保护隐私方面的满意度及满意度总分均高于对照组,观察组尿管外固定装置的牢固性优于对照组,差异均有统计学意义(P<0.05)。结论PVP术后尿管固定于腹部可减少患者活动后出血的发生率,促进康复,提高留置尿管期间的满意度,值得临床推广。
