per mil to +8 per mil versus SMOW, respectively); and (3) the intermediate group (δ 13 and δ 18 range from +20 per mil to +30 per mil versus PDB and -10 per mil to -15 per mil versus SMOW, respectively) is due to precipitation of the mineral-carbon system dissolved in water...
THE bands belonging to the Swan spectrum of carbon appear in the vacuum electric furnace at about 2400° C. At temperatures above 2600° they are strong and clear-cut, even the band at λ6191, difficult to obtain in the carbon arc, being well defined. It has been noted by one of us,...
Measurement of carbon-13 dioxide/carbon-12 dioxide abundance by nondispersive infrared heterodyne ratiometry as an alternative to gas isotope ratio mass sp... Measurement of carbon-13 dioxide/carbon-12 dioxide abundance by nondispersive infrared heterodyne ratiometry as an alternative to gas isotope ...
Carbon nitride has been synthesized in macroscopic amounts by means of the original method based on an ecologically safe technology using inorganic initial compounds. The product has been characterized by mass spectrometry (MS), X-ray diffraction, and quantitative chemical analysis. The MS and thermoc...
The mass of an atom of an isotope relative to 1/12 the mass of an atom of carbon-12. （一个同位素的原子质量相对于碳-12中一个原子的1/12的质量的比值。）[作揖]相对于碳-12的相对同位素质量可以通过以下方式计算：将该同位素的原子质量除以碳-12的原子质量，并乘以一个比例因子。该比例...
The relative mass (m) is a dimensionless number which is defined as the mass of an atom, a molecule or an ion divided by 1/12th of the mass of the 12C carbon atom. The charge number (z) is the total charge on an ion divided by the elementary charge (e), 1.602177 × 10− 19...
22 p.p.m.v. over the past 610,000 years. When these data are used in combination with indicators of ocean carbonate mineral saturation to force carbon cycle models, the maximum imbalance between the supply and uptake of CO2is 1–2% during the late Pleistocene. This long-term balance ...
When these data are used in combination with indicators of ocean carbonate mineral saturation to force carbon cycle models, the maximum imbalance between the supply and uptake of COis 1-2% during the late Pleistocene. This long-term balance holds despite glacial-interglacial variations on shorter ...
Two methods of measuring rates of gluconeogenesis based on label redistribution after the introduction of [U-13C]glucose into the whole body are examined. These methods are compared with methods previously derived for carbon-14 tracers. It is shown that the three approaches (stoichiometric, dilution...
et al. Early lithium plating behavior in confined nanospace of 3D lithiophilic carbon matrix for stable solid-state lithium metal batteries. Small 15, e1904216 (2019). Article CAS Google Scholar Liang, Z. et al. Composite lithium metal anode by melt infusion of lithium into a 3D ...