Stable and radioactive carbon in forest soils of Chhattisgarh, Central India: Implications for tropical soil carbon dynamics and stable carbon isotope evolution

2016 ◽  
Vol 123 ◽  
pp. 47-57 ◽  
Author(s):  
A.H. Laskar ◽  
M.G. Yadava ◽  
R. Ramesh
Keyword(s):  
Soil Carbon ◽  
Carbon Isotope ◽  
Forest Soils ◽  
Stable Carbon Isotope ◽  
Central India ◽  
Carbon Dynamics ◽  
Tropical Soil ◽  
Stable Carbon ◽  
Radioactive Carbon ◽  
Soil Carbon Dynamics

scholarly journals The Influences of Hydrology on the Radiogenic and Stable Carbon Isotope Composition of Cave Drip Water, Grotta di Ernesto (Italy)

Radiocarbon ◽  
2010 ◽  
Vol 52 (4) ◽  
pp. 1529-1544 ◽  
Author(s):  
J Fohlmeister ◽  
A Schröder-Ritzrau ◽  
C Spötl ◽  
S Frisia ◽  
R Miorandi ◽  
...  
Keyword(s):  
Soil Carbon ◽  
Water Cycle ◽  
Isotope Composition ◽  
Stable Carbon Isotope ◽  
Carbon Dynamics ◽  
Calcite Dissolution ◽  
Drip Water ◽  
Soil Carbon Dynamics ◽  
Ne Italy ◽  
Cave Drip Water

14C and δ13C values of C-containing species in cave drip waters are mainly controlled by the C isotope composition of karst rock and soil air, as well as by soil carbon dynamics, in particular the amount of soil CO2 in the unsaturated soil zone and the process of calcite dissolution. Here, we investigate soil carbon dynamics by analyzing the 14C activity and δ13C values of C dissolved in cave drip water. Monthly over a 2-yr period, we collected drip water from 2 drip sites, one fast and one relatively slow, within the shallow Grotta di Ernesto Cave (NE Italy). The 14C data reveal a pronounced annual cycle. In contrast, the δ13C values do not show an annual pattern and only small interannual variability compared to the δ13C values of soil waters. The annual 14C drip-water cycle is a function of drip-rate variability, soil moisture, and ultimately hydrology.

scholarly journals Micro alloying of SiC by radioisotope

2019 ◽  
Vol 222 ◽  
pp. 02013
Author(s):  
Alina Kuznetsova ◽  
Mikhail Dolgopolov ◽  
Albina Gurskaya ◽  
Viktor Chepurnov ◽  
Galina Puzyrnaya ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Silicon Carbide ◽  
Carbon Isotope ◽  
Silicon Substrate ◽  
Stable Carbon Isotope ◽  
Normal Pressure ◽  
Stable Carbon ◽  
Radioactive Carbon ◽  
Silicon Carbide Film ◽  
Gas Chamber

The endotaxia is the process of growth of one crystal structure inside the volume of another. In this case we are talking about the formation of the Silicon Carbide film in the Silicon substrate. The Silicon substrate is placed in the gas chamber. The sample is exposed to the stream of methane gas CH4 at temperature of 1360 - 1380 ◦C and at normal pressure. Moreover, gas contains both the stable Carbon isotope C12 and the radioactive Carbon isotope C14, and hydrogen H2 in the gas acts as a carrier of Carbon.

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