نتایج جستجو برای: lactase
تعداد نتایج: 1109 فیلتر نتایج به سال:
Oral glucose supply is important for neonatal calves to stabilize postnatal plasma glucose concentration. The objective of this study was to investigate ontogenic development of small intestinal growth, lactase activity, and glucose transporter in calves (n = 7 per group) that were born either preterm (PT; delivered by section 9 d before term) or at term (T; spontaneous vaginal delivery) or spo...
This Opinion of the EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA) deals with lactose thresholds in lactose intolerance and galactosaemia. LACTASE DEFICIENCY AND LACTOSE INTOLERANCE: Primary lactase deficiency, also referred to as lactase-nonpersistence (LNP), is genetically determined and a normal, developmental phenomenon characterised by the down-regulation of lactase activit...
Lactase persistence (LP) is a genetically determined trait whereby the enzyme lactase is expressed throughout adult life. Lactase is necessary for the digestion of lactose--the main carbohydrate in milk--and its production is downregulated after the weaning period in most humans and all other mammals studied. Several sources of evidence indicate that LP has evolved independently, in different p...
Lactase persistence (LP) is a genetically determined trait whereby the enzyme lactase is expressed throughout adult life. Lactase is necessary for the digestion of lactose—the main carbohydrate in milk—and its production is downregulated after the weaning period in most humans and all other mammals studied. Several sources of evidence indicate that LP has evolved independently, in different par...
-1. Phlorizin hydrolase activity has been determined in the intestinal homogenates of ten species. The activity decreased in the following order: frog, rabbit, squirrel, rat and monkey. The activity was either very low or could not be detected in chicken, pigeon, guinea-pig, goat and human. 2. The enzyme was optimally active in the pH range 5.0-5.7 in all the species investigated except in the ...
In most human populations, the ability to digest lactose contained in milk usually disappears in childhood, but in European-derived populations, lactase activity frequently persists into adulthood (Scrimshaw and Murray 1988). It has been suggested (Cavalli-Sforza 1973; Hollox et al. 2001; Enattah et al. 2002; Poulter et al. 2003) that a selective advantage based on additional nutrition from dai...
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