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KMID : 0381019920250030233
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Korean Journal of Nutrition
1992 Volume.25 No. 3 p.233 ~ p.247
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A Longitudinal Study of the total Nitrogen, Total Lipid, and Lactose Contents in Human Milk and Energy Intake of Breast-fed Infants
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문수재
이민준/김정현/강정선/안홍석/송세화/최문희
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Abstract
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The changes in human milk composition from 2~5 days to 12 weeks postpartum were investigated. Mild from 62 mothers was analyzed for total nitrogen (semimicro kjeldahl), lipid (utilizing a modified Folch)and lactose (enzymatic hydrolysis). Energy
was
calculated by fractional analysis. And the daily milk intakes and major nutrients and energy intakes of 18 exclusively breast-fed infants were determined by the test-weightng procedure and the direct analysis of milk samples at 6 or 7 weeks
postpartum.
All samples were from well-defined subjects and uniform collection procedures were used.
Total nitrogen content decreased significantly from 392 to 211 mg/dl. Lipid and lactose content increased from 1.94 to 3.06 g/dl and 6.90 to 7.50 g/dl. respectively.And energy content increased 55.6 to 64.5 kcal/dl but was not statistically
significant.
The amount of milk ingested ranged from 432 to 1266 ml/day and the mean intake was 764 ml/ day. Daily mean intakes for protein and energy were 10.0g and 450kcal in 6 or 7 weeks postpartum, respectively.
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