Methane conversion in the presence of oxygen under low-temperature radio frequency plasma

Methane conversion in the presence of oxygen under low-temperature radio frequency （RF） plasma was investigated.The experiment results indicated that the following four factors,i.e.,discharge voltage,discharge area,O2/CH4 molar ratio and total gas flowrate,affected remarkably the reaction performance.The optimum reaction conditions of methane conversion in the presence of O2 under RF plasma are as follows：discharge voltage 1050 V,discharge area 989.1mm 2,O2/CH4 molar ratio 1/10 and total gas flowrate 200 ml/min.A methane conversion of 91% could be reached under the optimum conditions.Oxygen is good for the breaking of C-H bonds and also acts as a sort of thinner.According to the low-temperature plasma characteristics,the macroscopic kinetics model of methane conversion in the presence of O2 under radio frequency plasma was studied.

轻链近端肾小管病超微病理特征及免疫电镜的诊断价值

目的探讨轻链近端肾小管病(LCPT)的超微病理学特征及免疫电镜的诊断价值。方法选择本中心2018至2021年确诊或考虑轻链近端肾小管病病例140例,所有病例均进行免疫电镜检查,分析其超微病理特点,并探讨免疫电镜在轻链近端肾小管病诊断中的作用。结果病例以中老年为主,男性患者明显多于女性,所有病例均存在一定蛋白尿。这些LCPT患者的超微结构可分结晶型及非结晶型两大类,共5个形态学变异体。免疫病理分析,Kappa型轻链稍多,结晶型LCPT中,Kappa型占绝对优势,高达87.80%。免疫电镜在4种免疫病理检查方法中检出率最高,达94.29%。结论LCPT具有独特的超微病理表现,电镜及免疫电镜在LCPT诊断、分型及鉴别诊断上具有关键的作用,尤其在早期结晶型LCPT中。