Analysis and Study on the Change of the Observed Geo-electric Field Data at Lhasa Geomagnetic Station before and after the Nepal MS8.1 Earthquake

In this paper,the main purpose is to analyze and research the characteristics of the geoelectric field observed data with a long time span and large amplitude abnormal change,at the Lhasa geomagnetic station( hereafter referred to as "Lhasa station "),before and after the Nepal M_S8. 1 strong earthquake,which occurred on April 25,2015. Based on the observation conditions,the observation system,and the observed data of Lhasa station preliminary discussed,the main characteristics of the abnormal change and evolution process are analyzed and studied,using the following two methods; the "synthesis energy accumulation"and the "power as MSA spectrum"analysis,from the two aspects of the"Time Domain"and"Frequency Domain. "The results show that the abnormal change of the geo-electric field observation of Lhasa station experienced a development stage following the process of "trend change- disturbance change- earthquake period-recovery period",and an evolution process of "low frequency change- high frequency change- smooth change- high frequency change ",before and after the Nepal M_S8. 1strong earthquake. Comprehensive analysis shows that the variation characteristics and evolution process of the geo-electric field at Lhasa station are basically consistent with the results of the relevant mechanism and phenomenon research. So far,this is valuable information with certain objectivity,which is typical and representative to reflect the whole process of the gestation, occurrence and complete development of such strongearthquakes.

THE STORY OF LHAMO,CASHIER AT A TIBETAN RESTAURANT

At present,Tibetan farmers and herdsmen can increase their incomes through nonagricultural industries.The economic development in the cities and towns offers a lot of opportunities for rural migrant workers in Tibet.Working in towns has become an important means for the Tibetan rural labor force to boost their incomes.With the advantages of possessing

基于黏附素HpaA B细胞表位的多抗原肽疫苗的免疫原性鉴定

目的制备以幽门螺杆菌(Hp)黏附素HpaA B细胞表位为基础的多抗原肽(MAP)疫苗,并分析其免疫原性。方法在GenBank数据库检索Hp黏附素HpaA的氨基酸及核苷酸序列。采用表位分析软件预测HpaA的B细胞表位,以此合成8分支MAP并免疫白毛黑眼兔,体外试验测定MAP与兔抗Hp多克隆抗体的亲和力,体内试验检测免疫血清抗体效价和抗体的特异性。结果HpaA的优势B细胞表位可能位于其氨基酸序列的第130~142和第212~219区段,并分别以上述B细胞表位合成8分支MAP1和MAP2。MAP1和MAP2均能在体外与兔抗Hp多克隆抗体结合,且MAP1具有较高的亲和力。仅MAP1能在体内诱导免疫应答,产生高滴度特异性抗体。结论HpaA氨基酸序列的第130~142区段为其优势B细胞表位,基于此合成的MAP具有较强的免疫原性。