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Open Access Publications from the University of California

Scholarly Works (2 results)

  • Article
  • Peer Reviewed
Indoor Environmental Quality (IEQ) (1986)

This paper describes the development of a chart in which lines of equal comfort are plotted across a wide range of environmental conditions . The chart can be used in the design of outdoor spaces and buildings where air velocity and radiant fields are outside their normal indoor ranges . The basis of the chart is the comfort index DISC, as predicted by the J.B . Pierce Foundation Laboratory two-node thermophysiological model . DISC is a function of skin temperature in cold conditions and of skin wettedness alone in hot conditions . It shows a greater sensitivity to humidity in hot conditions than does ET's . Examples of the chart are given for two clothing levels .

    Cover page: Thermal comfort under an extended range of environmental conditions
    • Article
    • Peer Reviewed
    UC Davis Previously Published Works (2012)

    Background/objectives

    The results of short-term studies in humans suggest that, compared with glucose, acute consumption of fructose leads to increased postprandial energy expenditure and carbohydrate oxidation and decreased postprandial fat oxidation. The objective of this study was to determine the potential effects of increased fructose consumption compared with isocaloric glucose consumption on substrate utilization and energy expenditure following sustained consumption and under energy-balanced conditions.

    Subjects/methods

    As part of a parallel arm study, overweight/obese male and female subjects, 40-72 years, consumed glucose- or fructose-sweetened beverages providing 25% of energy requirements for 10 weeks. Energy expenditure and substrate utilization were assessed using indirect calorimetry at baseline and during the 10th week of intervention.

    Results

    Consumption of fructose, but not glucose, led to significant decreases of net postprandial fat oxidation and significant increases of net postprandial carbohydrate oxidation (P<0.0001 for both). Resting energy expenditure (REE) decreased significantly from baseline values in subjects consuming fructose (P=0.031) but not in those consuming glucose.

    Conclusions

    Increased consumption of fructose for 10 weeks leads to marked changes of postprandial substrate utilization including a significant reduction of net fat oxidation. In addition, we report that REE is reduced compared with baseline values in subjects consuming fructose-sweetened beverages for 10 weeks.
      Cover page: Consumption of fructose-sweetened beverages for 10 weeks reduces net fat oxidation and energy expenditure in overweight/obese men and women
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