The Future of Protein:
In the long-term studies on preschool children the diets fed included a large proportion of plant food, so that digestibility was below that recorded for diets based on milk and eggs. Once the factor of digestibility is taken into account, the amount of protein that appears to support expected growth rates of 2—5-year-old children in the long-term studies Table 35, studies B,C, and D does not differ markedly from the requirement of high-quality protein predicted from the short-term studies.
This observation indicates that the amino acid composition of practical diets is not necessarily a limiting factor for preschool children when consumed in the proportions used in the long-term studies. However, the habitual home diets of some populations may provide the same foods in different proportions, and their constituent proteins may not supply an adequate combination of essential amino acids.
Under these circumstances the poor protein quality may require higher intakes. The margin of safety is obviously less for children than for adults, and the range of national diets needs to be examined with respect to amino acid content as well as digestibility, before concluding that no further adjustment for these factors is needed.
How this is to be done is shown in section 7. Long-term balance studies provide little information that might allow a firm estimate to be made of the safe levels of intake of school-age children and adolescents.
A sample of data from studies of 7—9-year-old girls is included in Table 35 studies E and F. In the United States of America a single study of 14—year-old boys 89 indicated that an intake of — mg N per kg per day from a mixed diet was needed to produce consistently positive N balances.
This represents an average intake, not corrected for digestibility, of 0. Energy, work and leisure. London, Heinemann Educational Books Ltd. Human physiological work capacity.
International Biological Programme Cambridge, Cambridge University Press, Studies on expenditure of energy and consumption of food by miners and clerks.
Fife, Scotland, Medical Research Council, Protein requirements of young Chinese male adults for ordinary Chinese mixed dietary protein and egg protein of usual levels of energy intake. Protein-energy requirements of developing countries: Tokyo, United Nations University,pp.
The evaluation of soy protein isolate alone and in combination with fish in adult Japanese men. Protein requirements of young adult males with a rural Mexican diet.
Assessment of protein-energy needs of Indian adults using short-term nitrogen balance methodology. Tokyo, United Nations University, Protein requirements of Chinese male adults.
Nitrogen balance of young Turkish adults on graded levels of protein intake.Energy consumption of supermarket depends more on temperature than humidity. • Multiple regression analysis is a flexible tool to consider for energy use prediction. Simone Giostra and Partners is a New-York based office dedicated to the pursuit of beauty and performance in the built environment.
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Power is the rate at which work is done, and energy is the capacity for doing work. Energy is often expressed in kilowatt-hours, and power is often expressed in kilowatts. A simple way of understanding the relationship between work, power and energy involves turning a bolt inside a tight nut using a.
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The Energy Biosciences Institute (EBI), a partnership institution at the University of California at Berkeley, Lawrence Berkeley National Lab, and the University of Illinois Urbana-Champaign, was formed in with sponsorship from the global energy company BP.