Convenient p H Stat Reaction Vessel for Small Volumes

History of the study of human body composition: A brief review

“…Undoubtedly, technological advances will continue to move the field forward and, ultimately, help to expand knowledge of human body composition variability throughout the life-cycle in health and disease. Anderson (1958) and E.C. Anderson and W. Langham (1959) …”

Evaluation of Adjusted Net 40 K Count as a Predictor of Muscle Mass in Yearling Beef Bulls

“…Considerable work has been done to measure natural K 40 radiation particularly I in human subjects (Woodward et al, 1956;Forbes and Hursh, 1963). Kulwich et al (1958) Using a pooled prediction equation for fat-free lean in 115 market weight pigs, Addison (1973) reported that 78.3 percent of the variation was accounted·for by the live K 40 cound and 78.7 percent was accounted for when weight was added to the model. Both prediction equations had standard errors of 2.94 pounds, but animals were similar in type and within a narrow weight range.…”

“…There are two properties of potassium that make its quantitative measurement in the living animal both useful and practical as an estimator of lean. First, a high proportion and relatively constant amount of the total body potassium is contained in the intracellular, non~fat (muscle) phase of body tissue (Kulwich et al, 1958;Forbes, 1963;Pfau et al, 1963). Second, all naturally occurring potassium has associated with it a radioactive isotope K 40 which makes up a constant fraction (.0119% ± .000056%) of the total potassium (Anderson, 1959;Forbes, 1963;Ward et al, 1967).…”

Estimation of Total Body Fat from Potassium-40 Content

“…6,10) to their work ( 2 ) . We have searched the writings of the Los Alamos group without finding more than oblique and vague references to fat determination in man by this technique.…”