Soils as Source and Sink of Environmental Carbon Dioxide

2010 ◽  
pp. 11-12 ◽  
Author(s):  
Rattan Lal
Keyword(s):  
Carbon Dioxide ◽  
Source And Sink

Effect of Tilt Angle on Subcritical/Supercritical Carbon Dioxide-Based Natural Circulation Loop With Isothermal Source and Sink

2015 ◽  
Vol 8 (1) ◽  
Author(s):  
Ajay Kumar Yadav ◽  
M. Ram Gopal ◽  
Souvik Bhattacharyya
Keyword(s):  
Carbon Dioxide ◽  
Tilt Angle ◽  
Flow Instability ◽  
Natural Circulation ◽  
Three Dimensional ◽  
Extensive Literature ◽  
Cfd Models ◽  
Natural Circulation Loop ◽  
Carbon Dioxide Co2 ◽  
Source And Sink

In recent years, a growing popularity of carbon dioxide (CO2) as a secondary fluid has been witnessed in both forced as well as in natural circulation loops (NCLs). This may be attributed to the favorable thermophysical properties of CO2 in addition to the environmental benignity of the fluid. However, an extensive literature review shows that studies on CO2-based NCLs are very limited. Also, most of the studies on NCLs do not consider the three-dimensional variation of the field variables. In the present work, three-dimensional computational fluid dynamics (CFD) models of a NCL with isothermal source and sink have been developed to study the effect of tilt angle in different planes. Studies have been carried out employing subcritical (liquid and vapor) as well as supercritical phase of CO2 as loop fluid at different operating pressures and temperatures. Results are obtained for a range of tilt angles of the loop, and a significant effect is observed on heat transfer, mass flow rate, and stability of the loop. It was also found that changing the orientation of the loop could be an elegant and effective solution to the flow instability problem of NCLs.

Africa as source and sink for atmospheric carbon dioxide

1993 ◽  
Vol 7 (1-3) ◽  
pp. 41-49 ◽  
Author(s):  
P. Branchu ◽  
H. Faure ◽  
J.-P. Ambrosi ◽  
E.M. van Zinderen Bakker ◽  
L. Faure-Denard
Keyword(s):  
Carbon Dioxide ◽  
Atmospheric Carbon Dioxide ◽  
Atmospheric Carbon ◽  
Source And Sink

scholarly journals The need for “apples-to-apples” comparisons of carbon dioxide source and sink estimates

Eos ◽  
2012 ◽  
Vol 93 (41) ◽  
pp. 404-405 ◽  
Author(s):  
Daniel Hayes ◽  
David Turner
Keyword(s):  
Carbon Dioxide ◽  
Source And Sink

Terrestrial Biosphere as a Source and Sink of Atmospheric Carbon Dioxide

2012 ◽  
pp. 1-15 ◽  
Author(s):  
Rattan Lal ◽  
K. Lorenz ◽  
R. F. Hüttl ◽  
B. U. Schneider ◽  
Joachim von Braun
Keyword(s):  
Carbon Dioxide ◽  
Atmospheric Carbon Dioxide ◽  
Terrestrial Biosphere ◽  
Atmospheric Carbon ◽  
Source And Sink

Electron Cytochemical Study of Carbon Dioxide Laser Effect on Rhesus Monkey Cornea

1974 ◽  
Vol 32 ◽  
pp. 224-225
Author(s):  
K. C. Tsou ◽  
J. Morris ◽  
P. Shawaluk ◽  
B. Stuck ◽  
E. Beatrice
Keyword(s):  
Carbon Dioxide ◽  
Electron Microscope ◽  
Rhesus Monkey ◽  
Carbon Dioxide Laser ◽  
Cytochemical Study ◽  
Laser Effect

While much is known regarding the effect of lasers on the retina, little study has been done on the effect of lasers on cornea, because of the limitation of the size of the material. Using a combination of electron microscope and several newly developed cytochemical methods, the effect of laser can now be studied on eye for the purpose of correlating functional and morphological damage. The present paper illustrates such study with CO2 laser on Rhesus monkey.

The Critical Point Drying Method Applied to Scanning Electron Microscopy of L-929 Cells

1970 ◽  
Vol 28 ◽  
pp. 278-279
Author(s):  
Charles TurnbiLL ◽  
Delbert E. Philpott
Keyword(s):  
Electron Microscopy ◽  
Carbon Dioxide ◽  
Surface Tension ◽  
Critical Point ◽  
Freeze Drying ◽  
Attractive Alternative ◽  
Crystal Formation ◽  
Critical Point Drying ◽  
Time Required ◽  
Scanning Electron

The advent of the scanning electron microscope (SCEM) has renewed interest in preparing specimens by avoiding the forces of surface tension. The present method of freeze drying by Boyde and Barger (1969) and Small and Marszalek (1969) does prevent surface tension but ice crystal formation and time required for pumping out the specimen to dryness has discouraged us. We believe an attractive alternative to freeze drying is the critical point method originated by Anderson (1951; for electron microscopy. He avoided surface tension effects during drying by first exchanging the specimen water with alcohol, amy L acetate and then with carbon dioxide. He then selected a specific temperature (36.5°C) and pressure (72 Atm.) at which carbon dioxide would pass from the liquid to the gaseous phase without the effect of surface tension This combination of temperature and, pressure is known as the "critical point" of the Liquid.

A global perspective of ground level, 'ambient' carbon dioxide for assessing the response of plants to atmospheric CO2

2001 ◽  
Vol 7 (7) ◽  
pp. 789-796 ◽  
Author(s):  
L. H. Ziska ◽  
O. Ghannoum ◽  
J. T. Baker ◽  
J. Conroy ◽  
J. A. Bunce ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ground Level ◽  
Global Perspective ◽  
Atmospheric Co2
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