Low temperature is an important environmen-tal factor that limits the productivity and dis-tribution of plant. The ability to cold acclima-tion is a common adaptive response in plantsnative in temperate regions and r... Low temperature is an important environmen-tal factor that limits the productivity and dis-tribution of plant. The ability to cold acclima-tion is a common adaptive response in plantsnative in temperate regions and results in en-hancing tolerance to chilling stress. In presentstudy the seedlings of Tesanai 2 were grown at28±1℃ and under a photo flux density (PFD)of 30μmol/m~2s for 8 d. The cold acclimationresponse is triggered by 14℃ under a PFD of75 μmol/m~2s for 3 d. Rice seedlings for cold-hardening were germinated from seeds treatedwith or without immersion in 30 mmol/L ofCaClsolution. Change of membrane systemprotection in leaves at various periods(viz:fol-lowing cold-hardening, chilling stress and onthe 3rd day of recovery), the ratio of survival展开更多
通过对高锰钢进行冷轧变形,考察了不同变形量下冷轧高锰钢的硬度变化,利用自制三体磨料磨损试验机测试了不同磨料磨损工况下,固溶态及其冷轧态的磨损特性。结果表明,冷轧变形可以大幅提高高锰钢的硬度。在软磨料的磨损条件下,冷轧变形...通过对高锰钢进行冷轧变形,考察了不同变形量下冷轧高锰钢的硬度变化,利用自制三体磨料磨损试验机测试了不同磨料磨损工况下,固溶态及其冷轧态的磨损特性。结果表明,冷轧变形可以大幅提高高锰钢的硬度。在软磨料的磨损条件下,冷轧变形可以有效提高高锰钢的耐磨性;在硬磨料的磨损条件下,冷轧变形对耐磨性没有贡献。利用M M Khruschov的磨损区域理论和E Rabinnowicz的磨损模型解释了在软磨料磨损条件下,冷轧变形提高高锰钢耐磨性的机制;同时利用K H ZumGahr的磨损模型解释了在硬磨料磨损条件下,冷轧变形对高锰钢耐磨性没有贡献的机制。展开更多
文摘 Low temperature is an important environmen-tal factor that limits the productivity and dis-tribution of plant. The ability to cold acclima-tion is a common adaptive response in plantsnative in temperate regions and results in en-hancing tolerance to chilling stress. In presentstudy the seedlings of Tesanai 2 were grown at28±1℃ and under a photo flux density (PFD)of 30μmol/m~2s for 8 d. The cold acclimationresponse is triggered by 14℃ under a PFD of75 μmol/m~2s for 3 d. Rice seedlings for cold-hardening were germinated from seeds treatedwith or without immersion in 30 mmol/L ofCaClsolution. Change of membrane systemprotection in leaves at various periods(viz:fol-lowing cold-hardening, chilling stress and onthe 3rd day of recovery), the ratio of survival
文摘通过对高锰钢进行冷轧变形,考察了不同变形量下冷轧高锰钢的硬度变化,利用自制三体磨料磨损试验机测试了不同磨料磨损工况下,固溶态及其冷轧态的磨损特性。结果表明,冷轧变形可以大幅提高高锰钢的硬度。在软磨料的磨损条件下,冷轧变形可以有效提高高锰钢的耐磨性;在硬磨料的磨损条件下,冷轧变形对耐磨性没有贡献。利用M M Khruschov的磨损区域理论和E Rabinnowicz的磨损模型解释了在软磨料磨损条件下,冷轧变形提高高锰钢耐磨性的机制;同时利用K H ZumGahr的磨损模型解释了在硬磨料磨损条件下,冷轧变形对高锰钢耐磨性没有贡献的机制。
