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. Author manuscript; available in PMC: 2014 Jun 9.
Published in final edited form as: Front Biosci (Landmark Ed). 2014 Jun 1;19:967–985. doi: 10.2741/4261

Figure 2.

Figure 2

Plots of the first two principal-component scores for rat energy metabolism. Male Sprague-Dawley rats (Charles River Laboratories) were fed a LF (blue circle) or HF (red circle) diet between 4 and 13 weeks of age. There were 16 rats per diet group. See Table 2 for experimental detail. At 13 weeks of age, rats were placed in a computer-controlled Oxymax instrument (an open circuit calorimeter; Columbus Instruments, OH) to measure 24-h O2 consumption, CO2 production, RQ, and heat production (34). The 24 hourly observations for each measured variable were reduced into two dimensions (two principal-component scores): “dimension 1” and “dimension 2”. The principal-component analysis is considered as a data reduction technique. (A) RQ scores; (B) HP scores; (C) VO2 scores; and (D) VCO2 scores.

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