Results 121 to 130 of about 23,534 (169)

Radioisotope-Based Protocol for Determination of Central Carbon Metabolism in T Cells

2020
T lymphocytes are the major components of the adaptive immune system. It's been known that T cells are able to engage a diverse range of metabolic programs to meet the metabolic demands during their life cycle from early development, activation to functional differentiation.
Xuyong, Chen, John William, Sherman, Ruoning, Wang   +2 more
openaire   +2 more sources

RNA-Radioisotope Probing for Studying Carbon Metabolism in Soils

2014
This chapter discusses RNA-radioisotope probing (RNA-RIP) for studying carbon metabolism in soils. Identifying the microorganisms driving bio-geochemical processes and how these are influenced by the physicochemical environment is the key to understand how microbial systems such as soils work.
O’Donnell, Anthony G., Jenkins, Sasha N., Whiteley, Andrew S.   +2 more
openaire   +2 more sources

Terrestrial radioisotopes in black shale hosted Mn-carbonate deposit (Úrkút, Hungary)

Acta Geophysica, 2013
Previously, little attention has been paid to terrestrial radioisotopes (U, Th, 40K) occurring in manganese ores, despite the fact that the biogeochemical relationship between Mn and U is versatile. Occurrence of terrestrial radioisotopes in great amounts during mining on a long-term causes significant radiation exposure.
Vigh, Tamás, Kovács, Tibor, Somlai, János, Kávási, Norbert, Polgári, Márta, Biró, Lóránt   +5 more
openaire   +1 more source

A radioisotopic tracer study of carbon formation in ethanol-air diffusion flames

Combustion and Flame, 1970
Experimental results have been obtained which show that carbon formation in ethanol-air diffusion flames occurs preferentially from the nonhydroxylated carbon atom of the ethanol molecule. The ratio of the contribution to solid carbon of the nonhydroxylated carbon atom to that of the hydroxylated atom equals 2:1.
D.F. Lieb, L.H.S. Roblee
openaire   +1 more source

Radioisotope tracer studies of inorganic carbon and Ca in microbially derived CaCO3

Geochimica et Cosmochimica Acta, 1999
Abstract Microbial calcification significantly impacts the cycling and deposition of inorganic carbon. This research employs 45 Ca and 14 C techniques as radioisotopic tracers to examine the role of cellular cycling of Ca 2+ and inorganic carbon in CaCO 3 precipitation by the unicellular green alga Nannochloris atomus .
Kimberly K Yates, Lisa L Robbins
openaire   +1 more source

Recording micro-densitometer employing beta-radiation from a carbon-14 radioisotope source

British Journal of Applied Physics, 1961
The variation of wood density through the thickness of the individual growth rings of trees is of interest to those concerned with research on the growing of trees and the subsequent utilization of the timber. An experimental instrument has been developed in which a finely collimated beam of carbon-14 beta-particles is used to measure the density ...
R A Lloyd, E H Adams
openaire   +1 more source

Estimation of groundwater residence time using environmental radioisotopes (¹⁴C,T) in carbonate aquifers, southern Poland

Isotopes in Environmental and Health Studies, 2013
Triassic carbonate aquifers in the Upper Silesia region, affected by intense withdrawal, have been investigated by means of isotopic analyses of (14)C, δ(13)C, δ(2)H, δ(18)O and (3)H. The isotopic examinations were carried out in the 1970s and in the early 1980s, and it was the first application of tracers to estimate age and vulnerability for the ...
Katarzyna, Samborska, Andrzej, Różkowski, Piotr, Małoszewski   +2 more
openaire   +2 more sources

A radioisotope method for locating points of entry of carbon monoxide into the cabin of an aircraft

The International Journal of Applied Radiation and Isotopes, 1966
Abstract The point of entry carbon monoxide exhaust gas into the cabin of a light aircraft during flight has been identified by a radioisotope technique. Krypton-85 gas was into the aircraft engine and the cabin monitored with a plastic phosphor detector.
W R, Ellis, B W, Seatonberry
openaire   +2 more sources

Investigation of the carbon dioxide distribution in cement bound wood samples using the radioisotope tracer technique

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 1992
Abstract Cement bound wood bricks are widely used as building element for light construction buildings. Static characteristics of bricks can be considerably improved by treating the raw mixture of cement-wood-water with carbon dioxide during the bonding process. Distribution of the CO2 among components and within the components is an important factor
H. Rahimi, L. Baranyai
openaire   +1 more source

Highly porous carbon-SiC composites with continuous carbon fibers for the production of radioisotopes in ISOL facilities

Journal of the European Ceramic Society
New C/SiC composites with continuous fibers were produced through impregnation of carbon fiber preforms and consolidation by hot pressing. The resulting sintered material was investigated as a potential target for nuclear applications, such as radioisotope production.
Sciti D., Corradetti S., Manzolaro M., Ballan M., Cesarotto D., Meneghetti G., Silvestroni L., Servadei F., Zoli L.   +8 more
openaire   +3 more sources