Baihua Lake is one of the largest artificial freshwater lakes of the southwest plateau of China,and is also the main drinking-water source of the capital ci
议题背景 船舶主流市场是指在远海、近海或在内河航运的三大主流船型:散货轮 集装箱船 油船船舶非主流市场是指除上述三大主流船型之外的船舶.
Introduction: Metals contamination especially in agricultural soils is the burning issue in the present era.Although,some heavy metals are essential for pla
为探明药用植物根围AM真菌遗传多样性,于2010年8月在河北省安国市3个样地(中药材种植基地、霍庄、大户村)用随机抽样法采集7种中药材根围土壤样品,分离筛选双网无梗囊霉(Acaulospora bireticulata)为试验菌种,进行孢子DNA提取、PCR扩增、序列测定及聚类分析,研究了双网无梗囊霉遗传多样性与土壤因子、宿主植物之间的关系,并选取两条代表菌株所测序列,连同从NCBI数据库中下载的
间充质干细胞具有自我增殖的能力,能够在一定条件下分化形成特定类型的细胞,脐带间充质干细胞移植进异体内后能分泌大量的生物活化因子,并具有免疫原性小,免疫抑制功能,能长时间生
Critical Customer Requirements Reliability - No unplanned engine stops Serviceability - Maintenance friendly design,OEM support Operational cost - High efficien
Serpentinitic soils contain high concentration of geogenic Ni.During serpentinitic mineral weathering,the release of Ni from the soils into ecosystems sugge