The structure of the disaccharide unit of the renal glomerular basement membrane.
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A collaborative study was conducted using a modified AOAC method (sugars in chocolate) for the determination of fructose, glucose, sucrose, and maltose in presweetened cereals by high pressure liquid chromatography (HPLC). Eight samples consisting of 6 products were analyzed in duplicate by the HPLC method and the AOAC Lane-Eynon method. The AOAC method was modified to use water-alcohol (1 + 1) and Sep-Pak C18 cartridges for sample cleanup. The HPLC results indicate precision comparable to the lane-Eynon method and the chocolate method. The modified HPLC method has been adopted official first action.
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OBJECTIVE: To investigate differences in the fatty acid composition, sterols, minor carbohydrates and sugar alcohols between human and formula milk. DESIGN: We analyzed the concentrations of triglycerides, sterols, di- and monosaccharides and sugar alcohols, as well as the fatty acid composition of 10 currently available types of formula milk for term babies. Results were compared with mature human milk from 99 exclusively breast-feeding Dutch women, who collected 24-hour samples in the second week (n = 99), sixth week (n = 99) and 3 months (n = 25) after delivery. Infant formula milk data were considered different if they fell outside the mean +/- 2s.d. range of corresponding human milk data. RESULTS: The triglyceride concentrations in human milk were lower than those of the formula milk, possibly due to an incomplete collection of fat-rich hindmilk. Formula milks tended towards a higher proportion of medium chain fatty acids and lower proportions of longer-chain polyunsaturated fatty acids. Formulas had cholesterol concentrations 3-35 times lower, and much higher phytosterol concentrations, compared with the human milk. In the formula milk types the glucose, sorbitol and myoinositol concentrations were generally lower, whereas the fucose and erythreitol concentrations were in the lower mean +/- 2s.d. human milk range. The galactose concentrations in the formulas were generally higher. CONCLUSIONS: Formula milk and human milk differ considerably in fatty acid composition and concentrations of cholesterol, phytosterols, monosaccharides and sugar alcohols. The biological consequences of these differences in composition are uncertain.
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