Determination of Carbon Dioxide Production by Prairie Grain Wireworm and Germinating Wheat Seeds Using Mass Fragmentography1

1980 ◽  
Vol 73 (4) ◽  
pp. 561-563 ◽  
Author(s):  
Neil D. Westcott ◽  
Young W. Lee ◽  
John F. Doane
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Production ◽  
Wheat Seeds

Variation in the respiratory quotient of birds and implications for indirect calorimetry using measurements of carbon dioxide production

1995 ◽  
Vol 198 (1) ◽  
pp. 213-219 ◽  
Author(s):  
G Walsberg ◽  
B Wolf
Keyword(s):  
Carbon Dioxide ◽  
Power Consumption ◽  
Indirect Calorimetry ◽  
Respiratory Quotient ◽  
Current Knowledge ◽  
Bird Species ◽  
Passer Domesticus ◽  
Carbon Dioxide Production ◽  
Accurate Estimation

Determination of animal power consumption by indirect calorimetry relies upon accurate estimation of the thermal equivalent of oxygen consumed or carbon dioxide produced. This estimate is typically based upon measurement or assumption of the respiratory quotient (RQ), the ratio of CO2 produced to O2 consumed. This ratio is used to indicate the mixture of lipids, carbohydrates and proteins in the metabolic substrate. In this analysis, we report the RQ for two bird species, Passer domesticus and Auriparus flaviceps, under several dietary and fasting regimes. RQ commonly differed substantially from those typically assumed in studies of energy metabolism and often included values below those explainable by current knowledge. Errors that could result from these unexpected RQ values can be large and could present the primary limit to the accuracy of power consumption estimates based upon measurement of carbon dioxide production.

scholarly journals Determination of Optimal PEEP by Carbon Dioxide Production (VCO2) in ARDS Patients

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Mohamed Samir Abdelghafar ◽  
Zahretelwady Mohamed Salaheldin Mohamed
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Production

Contactless, probeless and non-titrimetric determination of acid–base reactions using broadband acoustic resonance dissolution spectroscopy (BARDS)

The Analyst ◽  
2018 ◽  
Vol 143 (4) ◽  
pp. 956-962 ◽  
Author(s):  
M. Rizwan Ahmed ◽  
Sean McSweeney ◽  
Jacob Krüse ◽  
Bastiaan Vos ◽  
Dara Fitzpatrick
Keyword(s):  
Carbon Dioxide ◽  
Acoustic Resonance ◽  
Carbon Dioxide Production ◽  
Acid Base ◽  
Titrimetric Determination

Carbon dioxide production due to an acid–base reaction.

Difference in Caloric Expenditure in Sitting Versus Standing Desks

2012 ◽  
Vol 9 (7) ◽  
pp. 1009-1011 ◽  
Author(s):  
Christopher Reiff ◽  
Kara Marlatt ◽  
Donald R. Dengel
Keyword(s):  
Carbon Dioxide ◽  
Oxygen Consumption ◽  
Minute Ventilation ◽  
Carbon Dioxide Production ◽  
Caloric Expenditure ◽  
Gas System ◽  
The Hours ◽  
Mathematical Problems ◽  
Healthy Participants

Background:Traditional desks require students to sit; however, recently schools have provided students with nontraditional standing desks. The purpose of this study was to investigate differences in caloric expenditure of young adults while sitting at a standard classroom desk and standing at a nontraditional standing classroom desk.Methods:Twenty (10 male/10 female) young (22.8 ± 1.9 y), healthy participants reported to the laboratory between the hours of 7:00 AM and 2:00 PM following a 12-h fast and 48-h break in exercise. Participants were randomly assigned to perform a series of mathematical problems either sitting at a normal classroom desk or standing at a nontraditional standing desk. Inspired and expired gases were collected for 45-min for the determination of oxygen consumption (VO2), carbon dioxide production (VCO2), and minute ventilation (VE) using a metabolic gas system.Results:There were significant increases from sitting to standing in VO2 (0.22 ± 0.05 vs. 0.28 ± 0.05 L·min−1, P ≤ .0001), VCO2 (0.18 ± 0.05 vs. 0.24 ± 0.050 L·min−1, P ≤ .0001), VE (7.72 ± 0.67 vs. 9.41 ± 1.20 L·min−1, P ≤ .0001), and kilocalories expended per minute (1.36 ± 0.20 kcal/ min, P ≤ .0001 vs. 1.02 ± 0.22 kcal/min, P ≤ .0001).Conclusions:Results indicate a significant increase in caloric expenditure in subjects that were standing at a standing classroom desk compared with sitting at a standard classroom desk.

scholarly journals On the Estimation of Metabolism from Determinations of Carbon Dioxide Production and on the Estimation of External Work from the Respiratory Metabolism

1923 ◽  
Vol 21 (4) ◽  
pp. 440-450 ◽  
Author(s):  
Major Greenwood ◽  
Ethel M. Newbold
Keyword(s):  
Carbon Dioxide ◽  
Food Consumption ◽  
Carbon Dioxide Production ◽  
Respiratory Metabolism ◽  
External Work ◽  
Muscular Work ◽  
Scientific Papers ◽  
The Great War ◽  
Urgent Necessity

Towards the close of the Great War, when economy of food consumption was an urgent necessity, considerable attention was paid to the determination of the energetic needs of various kinds of muscular work. The majority of scientific papers then published dealt with the problem.

scholarly journals The respiration of barley plants I—Methods for the determination of carbohydrates in leaves

1935 ◽  
Vol 117 (806) ◽  
pp. 483-504 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Analytical Methods ◽  
Higher Plants ◽  
Carbon Dioxide Production ◽  
Subsequent Paper ◽  
Oxidative Breakdown ◽  
External Conditions ◽  
Experimental Difficulty

There is much evidence to show that under normal circumstances the respiration of higher plants involves the oxidative breakdown of hexose carbohydrate. During leaf starvation under carefully controlled external conditions, a gradual exhaustion of the carbohydrate substrate is, therefore, one of the important internal changes likely to affect the rate of carbon-dioxide production. The researches to be described here, and in a subsequent paper, were planned in order to test this possibility; an attempt has been made to discover the relation between the con­centration of readily available carbohydrate and the rate of carbon-dioxide production in starving leaves. The chief experimental difficulty involved was that of making accurate determinations of the various hexose sources present in the leaf, and methods whereby this could be done were tested extensively. Since the validity of many of the conclusions reached depends primarily on the accuracy of the analytical methods, it was considered important that an account of these should be included here. It is with this phase of the problem that the present paper is concerned.

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