研制了一种用于中药丸剂塑料球壳外层密封的专用蜡。将54号全炼石蜡和80号软质微晶蜡的混合物作为基础蜡料,考察各种添加剂对基础蜡料的熔点、运动黏度及其他性能的影响,确定该专用蜡的最佳制备配方为:54号全炼石蜡与80号软质微晶蜡的...研制了一种用于中药丸剂塑料球壳外层密封的专用蜡。将54号全炼石蜡和80号软质微晶蜡的混合物作为基础蜡料,考察各种添加剂对基础蜡料的熔点、运动黏度及其他性能的影响,确定该专用蜡的最佳制备配方为:54号全炼石蜡与80号软质微晶蜡的质量比为9∶1,低相对分子质量聚乙烯、C 5加氢石油树脂、乙烯-醋酸乙烯酯共聚物(EVA)、黏度调节助剂A、煤基费-托合成软质蜡、非晶态α-烯烃共聚物(APAO)的加入量(w,以基础蜡料的质量计)分别为1.0%,1.0%,0.5%,3.0%,20%,1.5%。在温度为120℃、时间为30 min、搅拌转速为200 r min的条件下制备的密封专用蜡在40℃及-10~-20℃下不变形、不龟裂,性能优于参比样品。展开更多
The response of two secondary provenances of Jatropha curcas originated respectively from Hainan Province and Guizhou Province to heat stress treatments was investigated.The capacity of scavenging organic free radical...The response of two secondary provenances of Jatropha curcas originated respectively from Hainan Province and Guizhou Province to heat stress treatments was investigated.The capacity of scavenging organic free radical of DPPH· in both secondary provenances firstly increased and then decreased with increasing temperature,and presented one peak pattern.The peak value was at 30 ℃ in Guizhou secondary provenance and at 35 ℃ in Hainan secondary provenance,respectively.Antioxidative ability in Hainan secondary provenance was significantly higher than that in Guizhou secondary provenance under high temperature treatment(>35 ℃).The maximal photosynthetic evolution of oxygen was at 40 ℃ in Hainan secondary provenance,whereas 35 ℃ in Guizhou secondary provenance.There was little change in the maximal primary photochemical quantum efficiency(F_v/F_m)of the PSⅡ,however the non-circle PSⅡquantum efficiency(Φ_PSⅡ)and the photochemical quenching(q_P)of Hainan were obvious higher than those of Guizhou secondary provenance.The nonphotochemical quenching(NPQ)of Hainan displayed more tolerance to high temperature than that of Guizhou secondary provenance.F_o-temperature curves showed that the inflexion temperature(T_i)of Hainan and Guizhou secondary provenance was 52 ℃ and 50 ℃ respectively.The experiment results indicated that Hainan secondary provenance of J.curcas was able to maintain relative higher function of photosynthetic apparatus because of its high antioxidative ability and more stability of membrane under high temperature condition.This would be one of possible reasons that Hainan secondary provenance displayed stronger resistance to high temperature than Guizhou secondary provenance.展开更多
文摘研制了一种用于中药丸剂塑料球壳外层密封的专用蜡。将54号全炼石蜡和80号软质微晶蜡的混合物作为基础蜡料,考察各种添加剂对基础蜡料的熔点、运动黏度及其他性能的影响,确定该专用蜡的最佳制备配方为:54号全炼石蜡与80号软质微晶蜡的质量比为9∶1,低相对分子质量聚乙烯、C 5加氢石油树脂、乙烯-醋酸乙烯酯共聚物(EVA)、黏度调节助剂A、煤基费-托合成软质蜡、非晶态α-烯烃共聚物(APAO)的加入量(w,以基础蜡料的质量计)分别为1.0%,1.0%,0.5%,3.0%,20%,1.5%。在温度为120℃、时间为30 min、搅拌转速为200 r min的条件下制备的密封专用蜡在40℃及-10~-20℃下不变形、不龟裂,性能优于参比样品。
文摘The response of two secondary provenances of Jatropha curcas originated respectively from Hainan Province and Guizhou Province to heat stress treatments was investigated.The capacity of scavenging organic free radical of DPPH· in both secondary provenances firstly increased and then decreased with increasing temperature,and presented one peak pattern.The peak value was at 30 ℃ in Guizhou secondary provenance and at 35 ℃ in Hainan secondary provenance,respectively.Antioxidative ability in Hainan secondary provenance was significantly higher than that in Guizhou secondary provenance under high temperature treatment(>35 ℃).The maximal photosynthetic evolution of oxygen was at 40 ℃ in Hainan secondary provenance,whereas 35 ℃ in Guizhou secondary provenance.There was little change in the maximal primary photochemical quantum efficiency(F_v/F_m)of the PSⅡ,however the non-circle PSⅡquantum efficiency(Φ_PSⅡ)and the photochemical quenching(q_P)of Hainan were obvious higher than those of Guizhou secondary provenance.The nonphotochemical quenching(NPQ)of Hainan displayed more tolerance to high temperature than that of Guizhou secondary provenance.F_o-temperature curves showed that the inflexion temperature(T_i)of Hainan and Guizhou secondary provenance was 52 ℃ and 50 ℃ respectively.The experiment results indicated that Hainan secondary provenance of J.curcas was able to maintain relative higher function of photosynthetic apparatus because of its high antioxidative ability and more stability of membrane under high temperature condition.This would be one of possible reasons that Hainan secondary provenance displayed stronger resistance to high temperature than Guizhou secondary provenance.
