• Journal of Nutrition and Health
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• v.28 no.5
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• pp.397-405
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• 1995

The present study examined the effects of swimming on some plasma parameters of lipid metabolism in the middle-aged women. The control group(C) was the women who lived without any intentional physical exercise, and the first experimental group(S I) and the second experimental group(S II) had gone swimming everyday at least one hour for 3-6 months, and more than one year, respectively. The results obtained were summarized as follows: 1) Energy and nutrient intakes of the three groups were not different, but the body fat(%) of two experimental groups(S I, S II) was significantly lower than that of control. 2) Total cholesterol and HDL-cholesterol in plasma were not significantly changed by swimming and swimming period. However, total lipids and LDL-cholesterol were significantly lower in the two experimental groups than in control. 3) The level of plasma triglycerides of SI was not different from the control, but SII showed significantly lower triglycerides. 4) Acid-soluble acylcarnitine and $\beta$-hydroxybutyrate concentration in plasma were significantly greater in SII than in control. There results suggest that regular swimming in a longer period might help to protect the risk of obesity and cardiovascular disease by modulating lipid metabolism.

• Microbiology and Biotechnology Letters
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• v.20 no.6
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• pp.668-676
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• 1992

For the purpose of optimizing poly-l3-hydroxybutyrate (PHB) production from Alcaligenes eutrophus, two-stage fed-batch culture was adopted. In this system, specifk growth rate was maximized during the first stage whereas specific production rate was maximized during the second stage. The optimal concentrations of glucose and ammonium chloride were 16.6 and 0.54 g/I in the growth stage and 20.0 and 0.07 g/l in the production stage, respectively. Proportional feedback control considering time lag was suggested for PHB production process and a simulator was developed for real-time control purpose.