منابع مشابه
Development of methods for body composition studies.
This review is focused on experimental methods for determination of the composition of the human body, its organs and tissues. It summarizes the development and current status of fat determinations from body density, total body water determinations through the dilution technique, whole and partial body potassium measurements for body cell mass estimates, in vivo neutron activation analysis for ...
متن کاملShielding studies on a total-body neutron activation facility
Background: Prompt gamma neutron activation analysis (PGNAA) is known as a non-invasive technique capable of measuring elemental concentration in voluminous samples in a short period of time. Also it is a valuable diagnostic tool for total body elemental measurements. 252Cf and 241Am-Be sources which are usually used in this method, generate not only neutrons, but also emit high-energy and unwa...
متن کاملThe effect of back pain on body posture, Somatotype and body composition in women
Background: Low back pain causes movement and occupational restrictions in women. The aim of this study was to compare women with and without low back pain and its relationship with body type, muscle percentage and fat. Methods: The statistical population consisted of women with low back pain (28 people, 30 to 60 years old) were randomly selected and 28 people were selected as healthy or contr...
متن کاملInfluence of body composition on physical activity validation studies using doubly labeled water.
This study investigated the influence of two approaches (mathematical transformation and statistical procedures), used to account for body composition [body mass or fat-free mass (FFM)], on associations between two measures of physical activity and energy expenditure determined by doubly labeled water (DLW). Complete data for these analyses were available for 136 African American (44.1%) and Hi...
متن کاملBody Composition Analyzer Based on PGNAA Method
Determination of the elemental compositions of a human body is a useful tool for understanding general physiology relationships, diagnosing some disease and cancers. Measurements of body composition yield data about normal growth, maturity and the process of ageing. Practically, these measurements provide standards against which departures from normality may be judged. It is necessary to define...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1947
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(17)30906-7