Mass measurements have been performed on stopping cosmic ray carbon nuclei in a nuclear emulsion stack, which was exposed to the primary radiation in a high altitude balloon flight. The mass determinations are based on measurements of mean track width and residual range in the range intervals 0...
Natural abundance carbon-13 and silicon-29 ENDOR studies of cyclopolysilane radical anionsmagnetic resonance, nuclear quadrupole resonance (organic substancesPublication » Natural abundance carbon-13 and silicon-29 ENDOR studies of cyclopolysilane radical anions....
Relative C and N ion abundances in high-excitation planetary nebulae are evaluated from theoretical recombination spectra of the C III, N III, C Iv, N IV ions. Such nebulae are found to be overabundant in carbon, and the relative C IV abundance increases with electron temperature. The fact...
Autotrophic carbon-fixing bacteria are the main drivers of carbon sequestration and elemental cycle in wetland ecosystems. Their relationship with environmental factors in karst soils such as soil organic carbon (SOC) fractions, which are affected by natural degradation and human disturbance, is key to...
The 12C/13C ratio in the present near-solar interstellar medium has been found to be 70±10, interpreted as reflecting “galactic chemical evolution” over the age of the solar system (Prantzos et al., 1996). Isotopic measurement of solar-wind carbon in lunar soils has not produced ...
Linking winter and summer events in a migratory bird by using stable-carbon isotopes. Science 282, 1884–1886 (1998). Article CAS PubMed Google Scholar Anders, A. D. & Marshall, M. R. Increasing the accuracy of productivity and survival estimates in assembling landbird population status. ...
The carbon isotope composition of ethyl alcohol produced during alcohol fermentation depended on the substrate used and was characterized by the value of &
摘要: Examines the possible relationship between salinity stress and natural abundance of carbon and nitrogen on a Lethent Clay Loam in California. Collection of soil and crop samples; Correlation of crop stress with soil salinity; Use of the primary enzyme for carbon dioxide fixation....
The abundance and sinking of particulate black carbon (PBC) were examined for the first time in the western Arctic and Subarctic Oceans. In the central Arctic Ocean, high PBC concentrations with a mean of 0.021 ± 0.016 μmol L−1were observed in the marginal ice zone (MIZ). ...
a碳钢与0Cr18Ni9之间 Between carbon steel and 0Cr18Ni9[translate] acalcuation calcuation[translate] aI meet 我见面[translate] a多元统计分析与SAS软件应用 Multi-dimensional statistical analysis and SAS software application[translate] aLateral driving angle 侧向驾驶的角度[translate] ...