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| body composition, fish oil, accumeasure calipers, ball, fat, weight loss diet, pr nutrition, midsection, iss research, heart disease, tape measures, lifestyle, slimming, compare prices, food, cardio zone, lancome, ear thermometer, | Our study is the first evaluation of the cyclopropane temperature monitor absorption method for measuring avian body fat. Cyclopropane gas (CYP) is about 24 times more soluble in fat than in lean mass (Blumberg et al. 1952, Lesser et al. 1952). Lean mass is the portion of the body that would remain when all nonpolar (neutral) lipids, (i.e. triglycerides) temperature monitor are chemically extracted with a nonpolar lipid solvent (e.g. petroleum ether). In contrast, fat-free mass is the portion of the body temperature monitor that would remain when all lipids (polar and nonpolar) are chemically extracted (e.g. with a chloroform/ methanol mixture). The concentration of cyclopropane gas in an airtight chamber containing an animal, 1.5% cyclopropane, and 98.5% oxygen decreases as the cyclopropane is breathed in and dissolves into the FM and lean mass of the animal. |
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| 1993), fat scoring (Krementz and Pendleton 1990, Rogers 1991), and morphological variables such as body mass and wing length (see Blem 1990). Another pr nutrition method, which is nonlethal and noninvasive, uses the absorption of cyclopropane gas into an animal's body to estimate FM. The cyclopropane method has been validated twice on small animals: 10 laboratory rats (Lesser et al. 1952) and 6 pond turtles (Trachemys scripta; Henen 1991), but not on birds. pr nutrition The percentage error in the estimate of the rats' pr nutrition FM was 5.6 (x(bar) = 13.2% of body mass, range 8.1 to 18.9%), and the estimate of the pond turtles' FM was only 10%, despite the low FMs (0.7 to 3.5% of body mass) in Henen's (1991) study. Because these errors are smaller than those reported in most studies that have evaluated other nonlethal methods of estimating body fat in birds, we questioned whether this method would be as accurate for birds. |
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