The physiological cost of muscular work measured by the discharge of carbon dioxide. Part I.—The energy output of dock labourers during “heavy work"

The metabolism Sub-Committee of the Food (War) Committee of the Royal Society at its first meeting considered the following two methods of inquiry for the determination of the energy output of men and women workers:— A. The Douglas-Haldane method, by which determinations of CO 2 and of O 2 are made, was adopted for recommendation to new workers as the standard method. B. Waller’s method by which determinations of CO 2 alone are made at short frequent intervals, was to be taken on trial.

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The physiological cost of muscular work measured by the discharge of carbon dioxide. Part II. —The energy output of labourers on cold storage work

Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character ◽

10.1098/rspb.1920.0014 ◽

1920 ◽

Vol 91 (639) ◽

pp. 229-248

Keyword(s):

Cold Storage ◽

Royal Society ◽

Statistical Treatment ◽

Probable Error ◽

Energy Output ◽

Arithmetic Means ◽

Physiological Cost ◽

Heavy Work ◽

Normal Work ◽

Minimum Interference

In pursuance of the investigation of dock labour initiated for the Food (War) Committee of the Royal Society last year, and thanks to the courtesy of several officials of the Port of London Authority and of several willing labourers, we were able to make two series of hourly observations of the CO 2 output of four labourers engaged upon heavy work in cold storage. A first short series was made during December, 1918, at the East Surrey Docks; a second and longer series at the Charterhouse Cold Storage Chambers, Smithfield Market during July, 1919. The data we have been able to obtain are obviously scanty, but, we believe, sufficient to prove the possibility of acquiring valuable information by an expeditious method, applied during normal work, and involving a minimum interference with that work. Our attempt to submit such scanty results to statistical treatment may perhaps be regarded as premature; we have, however, found it convenient, if only for the purpose of bringing out the necessity of more extensive observations, to work out the standard deviation and the ± probable error in the arithmetic means of the two series of observations made under different conditions.

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

Epidemiology and Infection ◽

10.1017/s0022172400031624 ◽

1923 ◽

Vol 21 (4) ◽

pp. 440-450 ◽

Cited By ~ 2

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.

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THE PHYSIOLOGICAL COST OF MUSCULAR WORK MEASURED BY THE EXHALATION OF CARBON DIOXIDE

BMJ ◽

10.1136/bmj.1.3149.669 ◽

1921 ◽

Vol 1 (3149) ◽

pp. 669-671 ◽

Cited By ~ 4

Author(s):

A. D. Waller ◽

G. De Decker

Keyword(s):

Carbon Dioxide ◽

Muscular Work ◽

Physiological Cost

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Spectrophotometeric Determination of Trifluoperazine HCL in Pure Forms and Pharmaceutical Preperations

International Journal of Pharmaceutical and Clinical Research ◽

10.25258/ijpcr.v9i5.8593 ◽

2017 ◽

Vol 9 (5) ◽

Author(s):

Mohammad Hamzah Hamzah ◽

Rawa M M Taqi ◽

Muna M. Hasan ◽

Raid J. M. Al-Timimi

Keyword(s):

Standard Method ◽

Limit Of Detection ◽

Molar Absorptivity ◽

Dosage Forms ◽

Oxidizing Agent ◽

Optimum Conditions ◽

Limit Of Quantification ◽

Cerium Ion ◽

Blank Solution

A simple and accurate spectrophotometric method for the determination of Trifluoperazine HCl in pure and dosage forms was developed. The method is based on the reaction between Trifluoperazine HCl and p-chloroaniline in the presence of cerium ion as oxidizing agent which lead to the formation of violate color product that absorbed at a maximum wavelength 570nm while the blank solution was pink. Under the optimum conditions a linear relationship between the intensity and concentration of TRF in the range 4-50μg/ml was obtained . The molar absorptivity 3.74×103 L.mol-1.cm-1 , Limit of detection (2.21μg/ml), while limit of quantification was 7.39μg/ml. The proposed analytical method was compared with standard method using t-test and F-test , the obtained results shows there is no significant differences between proposed method and standard method. Based on that the proposed method can be used as an alternative method for the determination of TRF in pure and dosage forms.

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