搜索结果: 16-28 共查到“知识库 理学 EC”相关记录28条 . 查询时间(0.032 秒)
Fossil and non-fossil sources of organic carbon（OC）and elemental carbon（EC）in Göteborg, Sweden
Fossil and non-fossil sources organic carbon OC elemental carbon EC Gö teborg
2009/3/13
Particulate matter was collected at an urban site in Göteborg (Sweden) in February/March 2005 and in June/July 2006. Additional samples were collected at a rural site for the winter period. Total...
On the isolation of elemental carbon (EC) for micro-molar 14C accelerator mass spectrometry: development of a hybrid reference material for 14C-EC accuracy assurance, and a critical evaluation of the thermal optical kinetic (TOK) EC isolation procedure
elemental carbon EC TOK
2009/2/18
The primary objective of the research reported here has been the development of a hybrid reference material (RM) to serve as a test of accuracy for elemental carbon (EC) isotopic (14C) speciation meas...
Size distribution of EC and OC in the aerosol of Alpine valleys during summer and winter
Size distribution EC OC aerosol of Alpine valleys
2009/1/14
Collections of samples were conducted for the determination of the size distributions of EC and OC during the intensive sampling campaigns of the POVA program, in two Alpine valleys of the French Alps...
A TGA/FT-IR study for measuring OC and EC in aerosol samples
TGA/FT-IR study OC EC aerosol samples
2008/12/30
Carbon analysis consists in the evaluation of the carbonaceous content of the aerosol (TC) but, more importantly, of its distribution between the two components EC (Elemental Carbon) and OC (Organic C...
缺中子176Ir核β+/EC衰变研究
异能态EC/β+衰变 氦喷嘴带传输系统 衰变纲图 半衰期
2008/12/5
在210MeV的束流能量下, 利用重离子熔合蒸发反应146Nd(35Cl, 5nγ)176Ir产生具有β+/EC衰变性质的核素176Ir,由氦喷嘴快速带传输系统将反应产物传送到低本底区进行测量. 经过实验数据的离线处理分析,对早先发表的176Ir衰变γ跃迁进行确认的同时又发现了3个新能级和10条新的γ射线, 丰富了176Os核的低位激发态能级纲图. 并根据典型γ射线的衰变时间谱建议了176Ir核的...
Seasonal variation of PM10 main constituents in two valleys of the French Alps. I: EC/OC fractions
Seasonal variation valley French Alps. I: EC/OC fractions
2008/12/1
Daily PM10 samples were collected at two urban sites within two valleys in the French Alps (Chamonix and St Jean de Maurienne) during a period of two and a half years. The carbonaceous species EC (ele...
利用16O重离子束轰击142Nd和147Sm同位素靶分别生成153Er和157Yb.借助氦喷嘴带传输系统和X-γ、γ-γ符合测量方法分离鉴别核素并测量其衰变性质.首次建立了153Er和157Yb的EC/β+衰变纲图.从中指认出153Ho的一个新三(准)粒子态和两个新单粒子态,指认出157Tm的一个新的同质异能态和一条新转动带.低位能级系统分析表明:在Ho和Tm这两条奇A核的同位素链中基态形状的转变...
缺中子核素129Ce的(EC/β+)衰变
(EC/β+)衰变 氦喷嘴快速带传输系统 化学提纯 衰变纲图
2008/1/26
利用102MeV16O6+束轰击同位素靶117Sn,通过熔合蒸发4n反应产生核素129Ce.由氦喷嘴快速带传输系统将反应产物送到低本底区.通过化学分离来制备待测的Ce样品,与此同时用16O束轰击117Sn的两种相邻的同位素靶118Sn和116Sn,并比较上述3种反应中的产物来进一步区分元素Ce的不同的同位素.结果一种半衰期为4.1min的活性被鉴定为129Ce.基于X–γ–t和γ–γ–t符合测量,...
缺中子120Ba核EC/β+衰变的再研究
EC/β+衰变 氦喷嘴反冲快速带传输系统 衰变纲图
2008/1/26
利用171MeV 32S束轰击92Mo靶,熔合蒸发(2n2p)反应合成了120Ba核.由氦喷嘴反冲快速带传输系统将反应产物送到低本底区.位于带子两侧的两个平面型高纯锗探测器对反应产物进行了符合测量.经离线数据分析,对早先发表的120Ba衰变γ射线予以确认,并补充了19条强度较弱、能量较低的γ射线.建议了120Ba的衰变纲图共包括35条γ射线和25条能级.
The Impact of EC and pH on the Adsorption of Zn and Cd by Palygorskite Mineral
Palygorskite Zn Cd Langmuir Freundlich adsorption
2011/11/4
The effects of various experimental parameters were investigated using a batch adsorption technique. Adsorption of Cd and Zn by pure palyorskite as a function of pH(pH 6, 8 and 10), EC (EC 4, 6 and 8)...
Epstein-Barr病毒基因组编码的BARF-1和EC-LF4蛋白质与免疫球蛋白结构同源
Epstein-Barr病毒 BARF-1 EC-LF_4 IDEAS软件包 ALIGN程序
2007/12/19
摘要 将EB病毒蛋白质BARF-1和EC-LF4与NBRF蛋白质库的序列进行局部同源性检索以及与已知的Ig V或C功能区相关分子进行对准比较,检查了同源性积分的统计学意义,并进行了二级结构预测和疏水性分析,确定了BARF-1的第13-124位和第126-221位残基片段分别与V和C样功能区类似,EC-LF4的第20-135位残基片段与V样功能区相似,BARF-1是非膜蛋白,EC-LF4是膜整合蛋白...
Efficiency of LH+EC Current Drive in Tokamaks Featuring an Internal Transport Barrier
LH+EC Current Drive Tokamaks an Internal Transport Barrier
2010/10/14
In the present paper we study the effects due to the occurrence of radial transport of particles in a tokamak on the efficiency of current drive due to combined action of lower hybrid waves and electr...
Chocolate Authenticity Control Concerning Compliance with the Conditions for Adding Cocoa Butter Equivalents as Laid Down by Directive 2000/36 EC
chocolate authenticity cocoa butter equivalent triglycerides
2014/3/17
Chocolate samples (22 in total, including 11 samples of milk chocolate) were bought from retail store in Prague
and tested for their CBEs contents in relation to the declaration of CBE addition on t...