The relationship between carbon monoxide abundance and visual extinction in interstellar clouds

1982 ◽  
Vol 262 ◽  
pp. 590 ◽  
Author(s):  
M. A. Frerking ◽  
W. D. Langer ◽  
R. W. Wilson
Keyword(s):  
Carbon Monoxide ◽  
Interstellar Clouds ◽  
Visual Extinction ◽  
The Relationship

scholarly journals DIBs, Interstellar Dust, and Extinction

2013 ◽  
Vol 9 (S297) ◽  
pp. 147-152 ◽  
Author(s):  
G. C. Clayton
Keyword(s):  
Interstellar Medium ◽  
Interstellar Dust ◽  
Dust Grains ◽  
Weak Correlation ◽  
Interstellar Clouds ◽  
The Galaxy ◽  
The Relationship

AbstractThe relationship between DIBs and dust is still unknown. The correlation between reddening and DIB strength means that the DIBs are mixed in with the dust and gas in interstellar clouds. The DIBs are relatively stronger in the diffuse interstellar medium than in dense clouds. There is only a weak correlation between the DIBs and the UV extinction parameters including the 2175 Å bump strength and the far-UV rise. In addition, the bump dust grains are sometimes polarized, while the DIBs are not. However, observations of DIBs in the SMC show that when the 2175 Å bump is weak or missing so are the DIBs. Two of the four sightlines that deviate strongly from the CCM UV extinction in the Galaxy show weak DIBs.

scholarly journals Carbon monoxide in collapsing interstellar clouds

1975 ◽  
Vol 199 ◽  
pp. 69 ◽  
Author(s):  
T. de Jong ◽  
A. Dalgarno ◽  
S.-I. Chu
Keyword(s):  
Carbon Monoxide ◽  
Interstellar Clouds

scholarly journals The clinical effect of smoking and environmental factors in spontaneous pneumothorax: a case-crossover study in an Inland province

2020 ◽  
Vol 14 ◽  
pp. 175346662097740
Author(s):  
Dohun Kim ◽  
Sang-Yong Eom ◽  
Chang-Seob Shin ◽  
Yong-Dae Kim ◽  
Si-Wook Kim ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Relative Humidity ◽  
Air Pollutants ◽  
Spontaneous Pneumothorax ◽  
Conditional Logistic Regression ◽  
Air Pressure ◽  
Case Crossover ◽  
Matched Data ◽  
Stratified Analysis ◽  
The Relationship

Background: The factors that trigger spontaneous pneumothorax have not been sufficiently evaluated. The purpose of this study is to analyze the relationship between the development of spontaneous pneumothorax and meteorological parameters, including air pollutants. Methods: This is a retrospective study using the medical records of 379 patients who were admitted for spontaneous pneumothorax (SP) over a period of 4 years. Meteorological and air pollution data were obtained from the National Meteorological Office and the Ministry of Environment. We employed a case-crossover design to evaluate the short-term association between SP and meteorological factors including air pollutants. Conditional logistic regression was used to analyze bi-directional matched data. Results: Increase of relative humidity (RH) and of carbon monoxide (CO) were associated with the risk of pneumothorax, with odds ratio (OR) for RH = 1.18 (1.02–1.36), CO = 1.23 (1.02–1.48). Moreover, as air pressure (AP) decreased, risk of pneumothorax increased, with OR = 1.30 (1.05–1.59) but others did not. In the stratified analysis, the effect of RH was positive in ex-smokers (OR = 3.31) and non-smokers (OR = 1.32), but negative in current smokers (OR = 0.72). The effect of AP was significant in younger patients (OR = 1.33), males (OR = 1.40), and non-smokers (OR = 1.36). CO was related only with non-smokers (OR = 1.35) Conclusion: The triggering factors for spontaneous pneumothorax were relative humidity, carbon monoxide, and air pressure. The effect of the trigger was prominent in patients who were younger (<45 years), non- or ex-smokers, and male. The reviews of this paper are available via the supplemental material section.

Observations of the J equals 2 yields 1 transition of carbon monoxide in interstellar clouds

1975 ◽  
Vol 196 ◽  
pp. L39 ◽  
Author(s):  
P. F. Goldsmith ◽  
R. L. Plambeck ◽  
R. Y. Chiao
Keyword(s):  
Carbon Monoxide ◽  
Interstellar Clouds

Relating Vehicle Emission Regulations to Air Quality

1988 ◽  
Vol 202 (4) ◽  
pp. 235-242
Author(s):  
M L Williams
Keyword(s):  
Carbon Monoxide ◽  
Air Quality ◽  
Motor Vehicles ◽  
Vehicle Emission ◽  
Gaseous Pollutants ◽  
Oxides Of Nitrogen ◽  
Emission Regulations ◽  
European Regulations ◽  
Emission Limits ◽  
The Relationship

The European regulations governing the emissions of gaseous pollutants from gasoline-engined motor vehicles is reviewed and discussed, including the so-called ‘Luxembourg Agreement’. The relationship between the regulation emission limits and those measured in practice from ‘as-received’ vehicles in use is also discussed. Having discussed the relationship between regulations and emissions, the further relationships between vehicle emissions and air quality are also discussed, giving particular attention to carbon monoxide, oxides of nitrogen and lead.

scholarly journals The abundances of atomic carbon and carbon monoxide compared with visual extinction in the Ophiuchus molecular cloud complex

1989 ◽  
Vol 344 ◽  
pp. 311 ◽  
Author(s):  
Margaret A. Frerking ◽  
Jocelyn Keene ◽  
Geoffrey A. Blake ◽  
T. G. Phillips
Keyword(s):  
Carbon Monoxide ◽  
Molecular Cloud ◽  
Atomic Carbon ◽  
Visual Extinction ◽  
Cloud Complex

scholarly journals Optimization of the Cremator Settings for the Disposal of Poultry Waste By Incineration in a Beet-emitting Boiler

2020 ◽  
Author(s):  
Victor Konovalov ◽  
Anna Konovalova ◽  
Vladimir Konovalov ◽  
Sergey Denisov ◽  
Gali Gumarov
Keyword(s):  
Carbon Monoxide ◽  
Moisture Content ◽  
Regression Models ◽  
Initial Moisture Content ◽  
Ash Content ◽  
Chicken Manure ◽  
The Relationship ◽  
Heat Released ◽  
Carbon Monoxide Content ◽  
Continental Climate

The purpose of this work is to substantiate the parameters of the boiler unit, which ensures the cremation of manure using microwave radiation. The substantiation of the amount of heat released during the burning of chicken manure at the industrial keeping of poultry in the conditions of sharply continental climate on the basis of minimization of product utilization values - ash content of wastes and pollution of smoke emissions is presented. Using the obtained regression models of magnetron emission power, moisture content of the burnt manure mass, mass air consumption for the specified product utilization parameters, the analysis of the relationship between the obtained parameters is made. Correlation analysis has shown a high correlation between the amount of heat released during the combustion of manure and the concentration of carbon monoxide in the smoke emissions. Rationally, the value of carbon monoxide content in the flue gases is 3.9%, corresponding to the amount of heat released 2.1 MJ/kg at the combustion of a kilogram of manure at the ash content of the residue of 18.4% and the initial moisture content of the manure of 38.4%. It provides power of radiation of magnetron 400 W on 1 kg of a waste and the mass flow rate of air of 13.8 kg/h.

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