scholarly journals Measurement of carbon monoxide concentration levels within an underground parking lot throughout the day

2020 ◽  
Author(s):  
Jacit Villanueva ◽  
BCIT School of Health Sciences, Environmental Health ◽  
Dale Chen
Keyword(s):  
Carbon Monoxide ◽  
Sampling Period ◽  
Weather Conditions ◽  
Ease Of Use ◽  
Government Regulations ◽  
Carbon Monoxide Concentration ◽  
Parking Lot ◽  
Mode Of Transportation ◽  
Ease Of Access ◽  
Subsequent Rise

Background: During the fall and winter months, people opt to using cars as a mode of transportation to and from work, school, or recreation. The ease of access, comfort, and efficiency of travel prompt an increase in drivers. Underground lots are ideal parking spaces during these months, which see an increase in traffic and subsequent rise in emissions, specifically carbon monoxide (CO) that can be hazardous to health at certain concentrations. This study is to determine the levels of CO in a confined parking space Methods: Air quality and composition were determined via passive dosi-tubes that were affixed onto columns within the Langara College underground parking lot in the morning and picked up for analysis in the afternoon. Results: There is an increase in carbon monoxide concentration within the underground parking lot, during peak hours. Traffic within the lot is found to be higher during poor weather conditions which correlate with ease of use and comfort of driving a car. There is also an increase in traffic on Tuesdays and Thursdays, which is likely dictated by class times. Carbon monoxide levels did not fail to meet government regulations during any sampling period. Conclusions: The air composition in the Langara underground parking lot is safe even during periods of high traffic, for the average person. However, individuals with underlying medical conditions should enter with caution, as the recorded CO levels can aggravate pre-existing cardio-pulmonary diseases.  

Pollutant emission from a heat station supplied with agriculture biomass and wood pellet mixture

2012 ◽  
Vol 33 (2) ◽  
pp. 231-242 ◽  
Author(s):  
Marek Juszczak ◽  
Katarzyna Lossy
Keyword(s):  
Carbon Monoxide ◽  
Pollutant Emission ◽  
Heat Output ◽  
Wood Pellets ◽  
Wood Pellet ◽  
Carbon Monoxide Concentration ◽  
Heat Efficiency ◽  
Air Stream ◽  
Fuel Mixtures ◽  
Lower Carbon

Pollutant emission from a heat station supplied with agriculture biomass and wood pellet mixtureTests for combustion of hay and sunflower husk pellets mixed with wood pellets were performed in a horizontal-feed as well as under-feed (retort) wood pellet furnace installed in boilers with a nominal heat output of 15 and 20 kW, located in a heat station. During the combustion a slagging phenomenon was observed in the furnaces. In order to lower the temperature in the furnace, fuel feeding rate was reduced with unaltered air stream rate. The higher the proportion of wood pellets in the mixture the lower carbon monoxide concentration. The following results of carbon monoxide concentration (in mg/m3presented for 10% O2content in flue gas) for different furnaces and fuel mixtures (proportion in wt%) were obtained: horizontal-feed furnace supplied with hay/wood: 0/100 - 326; 30/70 - 157; 50/50 - 301; 100/0 - 3300; horizontal-feed furnace supplied with sunflower husk/wood: 50/50 - 1062; 67/33 - 1721; 100/0 - 3775; under-feed (retort) furnace supplied with hay/wood: 0/100 - 90; 15/85 - 157; 30/70 - 135; 50/50 - 5179; under-feed furnace supplied with sunflower husk/wood: 67/33 - 2498; 100/0 - 3128. Boiler heat output and heat efficiency was low: 7 to 13 kW and about 55%, respectively, for the boiler with horizontal-feed furnace and 9 to 14 kW and 64%, respectively, for the boiler with under-feed furnace.

An Evaluation of the Box Model Estimating Carbon Monoxide Concentration in the City of Caracas, Venezuela

2014 ◽  
pp. 421-426
Author(s):  
Arcangelo Sena D’Anna ◽  
Luis Díaz Alarcón ◽  
Alberto Espinoza Cedeño ◽  
Enrique Chacón Melgarejo
Keyword(s):  
Carbon Monoxide ◽  
Box Model ◽  
Carbon Monoxide Concentration ◽  
The City

scholarly journals Studying the recurrent diagrams of carbon monoxide concentration at early ignitions in premises

2018 ◽  
Vol 3 (9 (93)) ◽  
pp. 34-40 ◽  
Author(s):  
Boris Pospelov ◽  
Vladimir Andronov ◽  
Evgenіy Rybka ◽  
Ruslan Meleshchenko ◽  
Pavlo Borodych
Keyword(s):  
Carbon Monoxide ◽  
Carbon Monoxide Concentration

Spatial heterogeneity of low-density populations of Melanoplus sanguinipes (Orthoptera: Acrididae) associated with grazing and vegetation treatments

2001 ◽  
Vol 133 (6) ◽  
pp. 843-855 ◽  
Author(s):  
Dennis J. Fielding ◽  
M.A. Brusven ◽  
Bahman Shafii ◽  
William J. Price
Keyword(s):  
Spatial Distribution ◽  
Vegetation Type ◽  
Sampling Period ◽  
Weather Conditions ◽  
Abundant Species ◽  
Rangeland Management ◽  
Low Density ◽  
Melanoplus Sanguinipes ◽  
Nymphal Stage ◽  
Dry Conditions

AbstractThe objectives of this study were to determine whether the spatial distribution of Melanoplus sanguinipes F., the most abundant species of grasshopper on rangeland in southern Idaho, varied annually in response to changing patterns of grazing and to investigate how vegetation affects the spatial distribution of low-density populations of M. sanguinipes at scales relevant to most rangeland-management activities. A lattice of 72 sites was established across nine pastures, covering approximately 5000 ha. At each site, densities of M. sanguinipes, percent canopy coverage by plant species, and percent forage utilization by livestock were estimated twice per year, in June when M. sanguinipes was in the nymphal stage and in August during the adult stage, for 4 years, 1991–1994. Spatial analyses of variance were used to evaluate the influence of grazing and vegetation type on densities of M. sanguinipes. In August of each year, densities of M. sanguinipes were lower on heavily grazed sites than on lightly grazed sites, except in 1993, when the opposite trend was observed. Above-normal precipitation in 1993 resulted in abundant growth of annual forbs and regrowth of grazed plants. The distribution of nymphs in June of 1993 and 1994 reflected the grazing patterns of the previous summer. Densities of M. sanguinipes were lower on crested wheatgrass habitats than on annual grasslands for every sampling period from June 1991 to June 1993, after which no differences were observed. We interpret the results to suggest that grazing effects on low-density populations of M. sanguinipes were contingent on weather conditions; under dry conditions, grazed habitats were less favorable to M. sanguinipes but, during relatively cool wet summers, grazing created conditions that were more favorable to M. sanguinipes.

Forecasting of Carbon Monoxide Concentration Based on Sequence-to-Sequence Deep Learning Approach

2021 ◽  
pp. 518-529
Author(s):  
Nur’atiah Zaini ◽  
Lee Woen Ean ◽  
Ali Najah Ahmed
Keyword(s):  
Carbon Monoxide ◽  
Deep Learning ◽  
Learning Approach ◽  
Carbon Monoxide Concentration

Lung diffusing capacity: rebreathing method, applicability in nonuniform ventilation

1965 ◽  
Vol 20 (1) ◽  
pp. 99-102 ◽  
Author(s):  
P. S⊘lvsteen
Keyword(s):  
Carbon Monoxide ◽  
Nonuniform Distribution ◽  
Diffusing Capacity ◽  
Carbon Monoxide Concentration ◽  
Straight Line ◽  
Co Concentration ◽  
Concentration Changes ◽  
Rectilinear Section ◽  
Rebreathing Method

We have calculated how the carbon monoxide concentration changes when subjects with different distributions of ventilation and lung diffusing capacity (Dl) respire in a small bag. The curve [loge CO concentration in the bag] versus [time] will sooner or later appear as a straight line. Dl is calculated from the slope of the rectilinear section of the curve and from lung and bag volume. If the curve becomes rectilinear within the period considered, Dl is calculated too low. In some cases the curve will not be rectilinear until more than 45 sec have passed, but will appear to be rectilinear during the period from 30 to 45 sec. If such an experiment is discontinued when 45 sec (the usual duration of experiment) have passed, Dl can be calculated at too high, at correct, or at too low values. nonuniform distribution of lung diffusing capacity Submitted on February 18, 1964

scholarly journals Relationship between cigarette smoking and the carbon monoxide concentration in the exhaled breath with perioperative respiratory complications

2018 ◽  
Vol 68 (5) ◽  
pp. 462-471 ◽  
Author(s):  
Seyda Efsun Ozgunay ◽  
Derya Karasu ◽  
Seyhan Dulger ◽  
Canan Yilmaz ◽  
Zeynep Tabur
Keyword(s):  
Carbon Monoxide ◽  
Cigarette Smoking ◽  
Exhaled Breath ◽  
Respiratory Complications ◽  
Carbon Monoxide Concentration

Can cumulative tobacco consumption, FTND score, and carbon monoxide concentration in expired air be predictors of chronic obstructive pulmonary disease?

2004 ◽  
Vol 6 (4) ◽  
pp. 649-653 ◽  
Author(s):  
Carlos Jiménez-Ruiz ◽  
Marc Miravitlles ◽  
Víctor Sobradillo ◽  
Rafael Gabriel ◽  
José Luis Viejo ◽  
...  
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Carbon Monoxide ◽  
Pulmonary Disease ◽  
Tobacco Consumption ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Carbon Monoxide Concentration ◽  
Expired Air
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