The neutron capture cross section for <sup>180</sup>Hf relative to the <sup>197</sup>Au（n,γ）<sup>198</sup>Au reaction ismeasured at neutron energies of 0.52,1.10 and 1.60 MeV usi...The neutron capture cross section for <sup>180</sup>Hf relative to the <sup>197</sup>Au（n,γ）<sup>198</sup>Au reaction ismeasured at neutron energies of 0.52,1.10 and 1.60 MeV using the activation method.Theactivities of the products are measured with a high resolution HPGe detector gamma ray spec-trometer.The errors of the measured results are 5%～6%.Our results have a good agreementwith those of other authors within errors.Cross sections for the reaction are calculated withUNF code and recommended data are also given.展开更多
目的检测吗啡(morphine,Mo)r点燃条件位置性偏爱(conditioned place preference,CPP)重现大鼠海马CA1区多巴胺(dopamine,DA)递质的变化,揭示海马CA1区DA递质的变化与吗啡点燃诱发CPP重现的关系.方法用恒量法(10mg/kg)给大鼠连续颈背部...目的检测吗啡(morphine,Mo)r点燃条件位置性偏爱(conditioned place preference,CPP)重现大鼠海马CA1区多巴胺(dopamine,DA)递质的变化,揭示海马CA1区DA递质的变化与吗啡点燃诱发CPP重现的关系.方法用恒量法(10mg/kg)给大鼠连续颈背部皮下注射(subcutaneous,SC)吗啡8d建立CPP模型;用生理盐水替代吗啡训练大鼠10d,使形成的CPP逐渐消退;单次SC2.5mg/kg吗啡点燃已消退的CPP.用荧光分光光度法检测吗啡点燃CPP重现大鼠海马CA1区DA递质的变化.结果SC10mg/kg吗啡8d建立CPP,生理盐水训练10d使已形成的CPP消退,小剂量吗啡(2.5mg/kg)使消退的CPP重现;吗啡点燃CPP重现大鼠海马CA1区DA含量与对照组比较显著增加(P<0.05).结论吗啡点燃CPP重现时大鼠海马CA1区DA增加,小剂量吗啡诱发大鼠CPP重现行为可能与海马CA1区中DA含量增加有关.展开更多
研究了LLDPE g GMA (甲基丙烯酸缩水甘油酯 )对PA66/PE相容性的影响。结果表明LLDPE g GMA是PA66/PE合金良好的反应型增容剂 ,对于PA66/PE合金 ,LLDPE g GMA的加入使合金的拉伸强度、弯曲强度、Izod缺口冲击强度有明显提高。但刚性和耐...研究了LLDPE g GMA (甲基丙烯酸缩水甘油酯 )对PA66/PE相容性的影响。结果表明LLDPE g GMA是PA66/PE合金良好的反应型增容剂 ,对于PA66/PE合金 ,LLDPE g GMA的加入使合金的拉伸强度、弯曲强度、Izod缺口冲击强度有明显提高。但刚性和耐热性略有降低 ,并且DMA谱图证实了LLDPE g GMA对PA66/PE的反应增容作用 。展开更多
文摘The neutron capture cross section for <sup>180</sup>Hf relative to the <sup>197</sup>Au（n,γ）<sup>198</sup>Au reaction ismeasured at neutron energies of 0.52,1.10 and 1.60 MeV using the activation method.Theactivities of the products are measured with a high resolution HPGe detector gamma ray spec-trometer.The errors of the measured results are 5%～6%.Our results have a good agreementwith those of other authors within errors.Cross sections for the reaction are calculated withUNF code and recommended data are also given.
文摘目的检测吗啡(morphine,Mo)r点燃条件位置性偏爱(conditioned place preference,CPP)重现大鼠海马CA1区多巴胺(dopamine,DA)递质的变化,揭示海马CA1区DA递质的变化与吗啡点燃诱发CPP重现的关系.方法用恒量法(10mg/kg)给大鼠连续颈背部皮下注射(subcutaneous,SC)吗啡8d建立CPP模型;用生理盐水替代吗啡训练大鼠10d,使形成的CPP逐渐消退;单次SC2.5mg/kg吗啡点燃已消退的CPP.用荧光分光光度法检测吗啡点燃CPP重现大鼠海马CA1区DA递质的变化.结果SC10mg/kg吗啡8d建立CPP,生理盐水训练10d使已形成的CPP消退,小剂量吗啡(2.5mg/kg)使消退的CPP重现;吗啡点燃CPP重现大鼠海马CA1区DA含量与对照组比较显著增加(P<0.05).结论吗啡点燃CPP重现时大鼠海马CA1区DA增加,小剂量吗啡诱发大鼠CPP重现行为可能与海马CA1区中DA含量增加有关.
文摘研究了LLDPE g GMA (甲基丙烯酸缩水甘油酯 )对PA66/PE相容性的影响。结果表明LLDPE g GMA是PA66/PE合金良好的反应型增容剂 ,对于PA66/PE合金 ,LLDPE g GMA的加入使合金的拉伸强度、弯曲强度、Izod缺口冲击强度有明显提高。但刚性和耐热性略有降低 ,并且DMA谱图证实了LLDPE g GMA对PA66/PE的反应增容作用 。
