搜索结果: 1-15 共查到“知识库 理学 elements”相关记录186条 . 查询时间(1.591 秒)
Platinum-Group Elements Geochemistry and Chromian Spinel Composition in Podiform Chromitites and Associated Peridotites from the Cheshmeh-Bid Deposit, Neyriz, Southern Iran: Implications for Geotectonic Setting
Cheshmeh-Bid Chromitite trace elements platinum-group elements boninitic magma supra-subduction zone
2018/4/10
Dunite and serpentinized harzburgite in the Cheshmeh-Bid area, northwest of the Neyriz ophiolite in Iran, host podiform chromitite that occur as schlieren-type, tabular and aligned massive lenses of v...
Abundances of rare earth elements in crude oils and their partitions in water
rare earth elements crude oil partition coefficient NMR Junggar Basin
2017/8/9
Patterns of the entire range of REE in crude oils and coexisting water, collected from mud volcanoes in Xinjiang Province of China, are reported here for the first time. Crude oils show light REE enri...
Simultaneous determination of 58 major and trace elements in volcanic glass shards from the INTAV sample mount using femtosecond laser ablation-inductively coupled plasma-mass spectrometry
volcanic glass tephra LA-ICP-MS element abundance femtosecond lasert
2017/4/10
Four volcanic glass samples on the INternational focus group on Tephrochronology And Volcanism (INTAV) sample
mount described by Kuehn et al. (2011) were analyzed to establish a new methodology for m...
THE BASE CHANGE FUNDAMENTAL LEMMA FOR CENTRAL ELEMENTS IN PARAHORIC HECKE ALGEBRAS
PARAHORIC HECKE Algebra
2015/9/29
Let G be an unramified group over a p-adic field F, and let E/F be a finite
unramified extension field. Let θ denote a generator of Gal(E/F). This paper concerns the
ma...
SPLITTING FIELDS OF CHARACTERISTIC POLYNOMIALS OF RANDOM ELEMENTS IN ARITHMETIC GROUPS
SPLITTING FIELDS CHARACTERISTIC POLYNOMIALS RANDOM ELEMENTS ARITHMETIC GROUPS
2015/8/26
We discuss rather systematically the principle, implicit in earlier works, that for a “random” element in an arithmetic subgroup of a (split, say) reductive algebraic group over a number field, the sp...
A g-element for a graded R-module is a one-form with properties similar to a Lefschetz class in the cohomology ring of a compact complex projective manifold, except that the induced multiplication map...
Trace elements mobility in soils from the hydrothermal area of Nisyros (Greece)
volatile elements fumarolic gases volcanoes
2015/8/18
Nisyros Island, Greece, is a stratovolcano known for its intense hydrothermal activity. On June 2013, during a multidisciplinary field campaign, soil samples were collected in the caldera area to dete...
AUTOMATIC TIE ELEMENTS DETECTION FOR LASER SCANNER STRIP ADJUSTMENT
airborne laser scanning segmentation strip adjustment
2015/8/13
Measurements with airborne laser scanners are performed in strips, usually with multiple length strips and a few cross strips. Due
to i) wrong or inaccurate calibration of the entire measurement syst...
GEOTRACES—A Global Study of the Marine Biogeochemical Cycles of Trace Elements and Their Isotopes
Marine Biogeochemical Cycles Trace Elements Their Isotopes
2015/7/28
Since the late 1990s there has been a growing impetus for a comprehensive global study of the marine biogeochemical cycles of trace elements and their isotopes (TEIs). This has led to the development ...
A sweeping preconditioner for time-harmonic Maxwell’s equations with finite elements
Maxwell’s equations Frequency domain Finite element methods Preconditioners Fast solvers Perfectly matched layers Block LDLt factorization High-frequency waves
2015/7/14
This paper is concerned with preconditioning the stiffness matrix resulting from finite element discretizations of Maxwell’s equations in the high frequency regime. The moving PML sweeping preconditio...
Long-term effect of diet amended by risk elements contaminated soils on risk element penetration and physiological parameters of rats
risk elements soil soil ingestion
2015/7/2
The long-term accumulation of risk elements (As, Cd, Pb) originated from differently contaminated soils in rat organism was investigated during a model two-generation experiment. The effect of soil co...
Impact of cadmium on the level of hepatic metallothioneins, essential elements, and selected enzymes in the experimental rat model
metal intoxication liver blood plasma detoxification Rattus norvegicus L.
2015/7/2
The response of different strains of laboratory rats (Rattus norvegicus L.) on both acute (via intraperitoneal injection) and chronic (via drinking water and/or diet) cadmium intoxication was investig...
COMPUTATIONAL DETECTION AND ANALYSIS OF TRANSCRIPTIONAL CONTROL ELEMENTS IN LYMPHOCYTE DEVELOPMENT
Lymphocyte T cells
2015/5/26
Lymphocyte development and differentiation in mammals follow
complex gene regulatory mechanisms with control at the transcriptional stage playing a major role. B and T cells, the two large subsets o...
Regulocator: A Novel Method for the Identification of Conserved Elements in Genomic DNA
ReguLocator DNA Conserved Elements
2015/5/26
The process of generating RNA message from a gene is termed "transcription," and is performed by aptly named "transcription factors." These transcription factors can function singly or in conjunction ...
Microbial Community Composition and the Effects of Trace Elements on Methanogenesis Associated with Deep Subsurface Coal
Biological sciences Coalbed methane Coal biodegradation Methanogenesis Trace elements
2015/1/28
Biogenic coalbed methane (CBM), an end product of anaerobic coal biodegradation, is a natural gas. It is generated and trapped in large quantities in deep, unmineable coalbeds. This dissertation descr...