对采集自北冰洋楚科奇海(水深26m-69.6m)的10个表层沉积物样品,运用分散差速离心法处理,55℃热处理6 min后,经系列稀释后涂布于SC、R2A、ISPⅡ和改良的M1培养基,并在培养基中添加萘啶酮酸、放线菌酮、制霉素来抑制革兰氏阴性细菌和霉菌.在28℃条件下培养1-4周,根据菌落形态不同分离出了73个放线菌菌株.运用BOX-PCR方法去掉重复菌株后,从中选择30株代表菌株进行后续研究.经1
2011年11月23日,我国在挪威开展了极区冬季电离层加热实验。加热电磁波的极化方式为O波,加热方式为线性调频加热,加热波束的指向为地磁场方向,占空比为18分钟开,12分钟关。通过对UHF雷达探测数据的处理分析,发现此次加热实验中等离子体线的回波功率增强特征异常明显,在整个加热周期内均存在不同程度的增幅,最大增幅可达到几千倍,甚至上万倍。另一方面,等离子体线回波功率增幅存在一定时间演化特征,在加热
Aerosols in the atmosphere can scatter and absorb solar radiation and their spatial/temporal distributions are highly inhomogeneous due to short lifetimes (about a few weeks of less).Through scatterin
Electron microscopy is unique and superb technique in aerosol research: it simultaneously provides morphology and composition information of individual aerosols.However, conventional types of the inst
Many observational and numerical studies have indicated that urban-induced aerosol effect could modify cloud property, precipitation, and further weather pattern over and downwind of urban region.Eun
Chemical transport models (CTMs) are available in the forecast and reconstruction of the radioactive pollution caused by nuclear disasters.The Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident o
Shanxi Province is located in the northern Loess plateau.The spatial and temporal distribution of water vapor in the Loess Plateau was analyzed by using the NCEP data and GPS-MET observation data of S
Aerosol has significant effects on direct/indirect climate forcing, visibility, tropospheric chemistry and human health.Water can represent an extensive proportion of the mass of aerosol particles, an
Shallow convective clouds including cumulus humilis and cumulus congestus clouds which in develpoment phase were detected on the Loess Plateau for ten times in August,2013 by using Shanxi cloud physic
Despite its fundamental role in driving the genesis and evolution of tropical cyclones as well as large scale atmospheric waves including ENSO, monsoon and MJO, the spatial and temporal distribution o