搜索结果: 16-29 共查到“理学 trace elements”相关记录29条 . 查询时间(0.281 秒)
Cumulative Semivariogram Models of Trace Elements from Springs in Saudi Arabia
Cumulative Semivariogram Models Trace Elements Saudi Arabia
font style='font-size:12px;'>
2009/10/26
Trace elements are rarely distributed in earth's crust and they are invariably in
low concentrations. Due to this low concentration they are not analyzed by
conventional hydrochemical methods but by...
Use of immobile trace elements for the correlation of Telychian bentonites on Saaremaa Island,Estonia,and mapping of volcanic ash clouds
bentonites K-bentonites Telychian correlation isopach schemes East Baltic
font style='font-size:12px;'>
2009/10/21
Thirty suspected altered volcanic ash (bentonite) samples from the Nässumaa-825 and Orissaare-859 sections were analysed by the X-ray fluorescence method. Twenty of these samples revealed chemica...
Relationships between size-fractionated indoor and outdoor trace elements at four retirement communities in southern California
size-fractionated indoor outdoor trace elements four retirement communities southern California
font style='font-size:12px;'>
2009/7/22
Indoor and outdoor water soluble trace elements (TEs) were analyzed on quasi-ultrafine (UF), accumulation, and coarse PM filter samples collected at four retirement communities, three located in the S...
Trace elements in South America aerosol during 20th century inferred from a Nevado Illimani ice core, Eastern Bolivian Andes（6350 m asl）
Trace elements South America aerosol Nevado Illimani ice core Eastern Bolivian Andes
font style='font-size:12px;'>
2009/3/11
A 137 m ice core drilled in 1999 from Eastern Bolivian Andes at the summit of Nevado Illimani (16º 37' S, 67º 46' W, 6350 m asl) was analyzed at high temporal resolution, allowing a characte...
Preconcentration of Trace Elements on Amberlite XAD-4 Resin Functionalised with 1,2-bis (o-aminophenylthio) Ethane and Their Determination by FAAS in Environmental Samples
Water trace element preconcentration Amberlite XAD-4 FAAS 1 2-bis (o-aminophenylthio) ethane chelating resin
font style='font-size:12px;'>
2010/4/8
The use of chemically modified XAD-4-1,2-bis (o-aminophenylthio) ethane chelating resin for preconcentrating Cr6+, Mn2+, Fe3+, Co2+, Cu2+, Cd2+, Zn2+, Pb2+, and Ni2+ was studied using flame atomic abs...
Sedimentary cycles of trace elements in Salawusu River Valley since 150 ka BP
font style='font-size:12px;'>
2007/8/24
The paper makes some analyses on 11 trace elements in the Milanggouwan stratigraphical section in the Salawusu River valley, which is regarded as a prototype geology-palaeoclimate record s...
Trace elements in agroecosystems and impacts on the environments.
font style='font-size:12px;'>
2007/7/28
期刊信息
篇名
Trace elements in agroecosystems and impacts on the environments.
语种
日文
撰写或编译
作者
He,Z. L.,X. E. Yang,and P. J. Stoffella.
第一作者单位
刊物名称
International Symposium on Trace Elements and Health-Trace...
The Effect of Acid Digestion on the Recoveries of Trace Elements: Recommended Policies for the Elimination of Losses
Open wet digestion losses recovery elimination trace elements differential pulse polarography
font style='font-size:12px;'>
2010/4/19
Digestion of biological materials is very important for trace element determinations. Although the microwave technique is mostly used, there are cases where open wet digestion is needed. This study ex...
Analysis and Discussion of Trace Elements in Teeth of Different Animal Species
Trace Elements Different Animal Species
font style='font-size:12px;'>
2010/10/15
Human, bovine and swine teeth were analyzed by Proton Induced X-ray Emission (PIXE). The aim of this work was to determine the concentration of trace elements in enamel and dentine of different animal...
Assimilation and retention of selenium and other trace elements from crustacean food by juvenile striped bass (Morone saxatilis)
Assimilation and retention of selenium other trace elements crustacean food juvenile striped bass Morone saxatilis
font style='font-size:12px;'>
2014/5/27
Estimates of the assimilation and retention of trace elements from food by fish are useful for linking toxicity with the biogeochemical cycling of these elements through aquatic food webs. Here we use...
XAFS study of the coordination and local relaxation around Co2+, Zn2+, Pb2+, and Ba2+ trace elements in calcite
XAFS coordination local relaxation trace elements calcite
font style='font-size:12px;'>
2012/3/31
Analysis of divalent Co, Zn, Pb, and Ba XAFS spectra of synthetic and natural calcite samples
containing trace concentrations of these heavy metals confirms their substitution in the unique Ca
site ...
The effect of trace elements on the olivine-wadsleyite transformation
trace elements olivine-wadsleyite transformation
font style='font-size:12px;'>
2012/4/1
Multianvil experiments were conducted at 1400 to 1600 8 C on olivine and peridotite starting compositions to determine the partitioning of Ti, Al, Cr, Ni, Ca, and Na between coexisting olivine and wad...
Comparative Study of the Mobility of Major and Trace Elements During Alteration of an Andesite and a Rhyolite to Bentonite, in the Islands of Milos and Kimolos, Aegean, Greece
Alteration Andesite Bentonite Element Mobilization Mordenite Phosphates REE Fractionation Residual Enrichment Rhyolite Smectite Water:Rock Ratio
font style='font-size:12px;'>
2011/12/8
Abstract: Progressive alteration by seawater of an andesite in the Aegean Island of Milos and an ignimbrite in the Aegean Island of Kimolos, Greece, formed bentonites with or without zeolites. Both pr...
Trace elements fractionation by impact-induced volatilization: SIMS study of lunar HASP samples
Trace elements fractionation impact-induced volatilization SIMS study lunar HASP samples
font style='font-size:12px;'>
2012/4/5
Impactisadominantprocessactingonthesurfacesofplanetarybodiesandisthemajor
processthatmodi?esthephysicalandchemicalnatureofplanetarymaterialsonatmo-
sphere-freebodiesoncevolcanicactivityhasceased.Ele...