搜索结果: 1-15 共查到“理学 tracers”相关记录41条 . 查询时间(0.077 秒)
The natural abundance of 14C in total CO2 dissolved in seawater (DIC) is a property applied to evaluate the water age structure and circulation in the ocean and in ocean models. In this study we use t...
Use of rare earth oxides as tracers to identify sediment source areas for agricultural hillslopes
rare earth oxides sediment source areas agricultural hillslopes
2014/12/31
Understanding sediment sources is essential to enable more effective targeting of in-field mitigation approaches to reduce diffuse pollution from agricultural land. In this paper we report on the appl...
Radio and Far-Infrared Emission as Tracers of Star Formation and Active Galactic Nuclei in Nearby Cluster Galaxies
AWM7 A426
2014/12/24
We have studied the radio and far-infrared (FIR) emission from 114 galaxies in the seven nearest clusters (<100 Mpc) with prominent X-ray emission to investigate the impact of the cluster environment ...
DUST-CORRECTED STAR FORMATION RATES OF GALAXIES. I. COMBINATIONS OF H alpha AND INFRARED TRACERS
ISM evolution
2014/12/22
We combine Hα emission-line and infrared (IR) continuum measurements of two samples of nearby galaxies to derive dust attenuation-corrected star formation rates (SFRs). We use a simple energy balance ...
Biased swimming cells do not disperse in pipes as tracers: a population model based on microscale behaviour
Algae dispersion swimming pipe
2012/5/17
There is much current interest in modelling suspensions of algae and other micro-organisms for biotechnological exploitation, and many bioreactors are of tubular design. Using generalized Taylor dispe...
Octanol-water partition coefficients (Kow) vs. pH for fluorescent dye tracers (fluorescein, eosin Y), and implications for hydrologic tracer tests
fluorescein eosin Y tracer octanol-water retardation
2017/4/11
Values of the octanol-water partition coefficient (Kow) have been measured vs. pH for two fluorescent dyes (fluorescein,
eosin Y) commonly used in hydrologic tracer tests. Values for both fluorescent...
Galaxy Zoo: Dust lane early-type galaxies are tracers of recent, gas-rich minor mergers
galaxies: evolution — galaxies: interactions — galaxies: active — galax-ies: elliptical and lenticular
2011/10/17
We present the second of two papers concerning the origin and evolution of local early-type galaxies exhibiting dust features. We use optical and radio data to examine the nature of AGN activity in th...
The deeply obscured AGN of NGC4945 I. Spitzer-IRS maps of [Ne V], [Ne II], H2 0-0 S(1), S(2), and other tracers
Galaxies:active – Galaxies:nuclei – Galaxies:individual:NGC 4945 – ISM:lines and bands
2011/9/27
The nearly edge-on galaxy NGC4945 is one of the closest galaxies where an AGN and starburst coexist, and is one of the brightest sources at 100 keV. Near and mid-infrared spectroscopy have shown very ...
Diurnal variations of polar organic tracers in summer forest aerosols: A case study of a Quercus and Picea mixed forest in Hokkaido, Japan
secondary organic aerosol isoprene 2-methyltetrols levoglucosan
2017/4/12
We investigated the summertime formation of secondary organic aerosols (SOA) via the oxidation of isoprene, α/β-
pinene and β-caryophyllene in a Quercus crispula and Picea glehnii mast mixed forest l...
Ergosterol, arabitol and mannitol as tracers for biogenic aerosols in the eastern Mediterranean
biogenic aerosols the eastern Mediterranean Ergosterol arabitol mannitol
2011/2/24
Aerosols containing biological components can have a significant effect on human health by causing primarily irritation, infection and allergies. Specifically, airborne fungi can cause a wide array of...
Analysis of 13C and 18O isotope data of CO2 in CARIBIC aircraft samples as tracers of upper troposphere/lower stratosphere mixing and the global carbon cycle
13C and 18O isotope data CO2 CARIBIC aircraft samples the global carbon cycle
2010/9/21
The project CARIBIC (http://caribic-atmospheric.com) aims to study atmospheric chemistry and transport by regularly measuring many compounds in the free troposphere and the upper troposphere/lowermost...
Description and evaluation of the Model for Ozone and Related chemical Tracers,version 4 (MOZART-4)
Description evaluation Model Ozone Related chemical Tracers
2010/2/5
The Model for Ozone and Related chemical Tracers, version 4 (MOZART-4) is an offline global chemical transport model particularly suited for studies of the troposphere. The updates of the model from i...
Short-term climatic impact of the 1991 volcanic eruption of Mt. Pinatubo and effects on atmospheric tracers
Short-term climatic impact the 1991 volcanic eruption Mt. Pinatubo atmospheric tracers
2009/12/9
Large explosive volcanic eruptions are capable of injecting considerable amounts of particles and sulphur gases (mostly sulphur dioxide) above the tropopause, causing increases in the stratospheric ae...
Inverse modelling of atmospheric tracers:non-Gaussian methods and second-order sensitivity analysis
Inverse modelling atmospheric tracers non-Gaussian methods second-order sensitivity analysis
2009/10/30
For a start, recent techniques devoted to the reconstruction of sources of an atmospheric tracer at continental scale are introduced. A first method is based on the principle of maximum entropy on the...
The Application of Radioactive Tracers for Determination of Bed-Load Transport in Alluvial Rivers
Radioactive Tracers Bed-Load Transport Alluvial Rivers
2009/10/28
Radioactive isotopes have been applied for determining the transport rate of
bed load in an alluvial river on the basis of: centroid velocity of the tracer
particles, size and material-transporting ...