OBJECTIVES: We present new @entity1568 isotopic discrimination factor between diets and scalp hairs (  (15) NHair-Diet :   (15) NHair -   (15) NDiet ) for indigenous residents in three communities in the Papua New Guinea Highlands who consumed various amounts and qualities of protein. The   @entity13140 is important for precise evaluation of the dietary habits of @entity1 populations; in both contemporary and traditional lifestyles. Several hypotheses have been proposed regarding factors that affect   @entity13140 values, based largely on observations from animal feeding experiments. However, variations and factors controlling   @entity13140 in @entity1 are not well understood, mainly due to the difficulty of controlling the diets of @entity1 . MATERIALS AND METHODS: These residents were studied because they have maintained relatively traditional dietary habits, which allow quantitative recording of diets.   @entity13140 was estimated by comparing hair   @entity13140 values to mean dietary   @entity13140 values calculated from the recorded intake of each food item and their   @entity13140 values. RESULTS: The results showed that: i) there was a significant difference in   @entity13140 among study locations (3.9        0.9    for most urbanized, 5.2        1.0    for medium and 5.0        0.9    for least urbanized communities; range   =   1.2-7.3    for all @entity1 ); and ii) estimated   @entity13140 values were negatively correlated with several indicators of animal protein intake (% @entity1568 in diet: range   =   0.9-7.6%). DISCUSSION: We hypothesize that a combination of several factors, which presumably included @entity1133 recycling and @entity3689 and protein recycling and/or de novo synthesis during metabolic processes, altered the   @entity13140 values of the @entity1 . Am J Phys Anthropol, 2015.    2015 Wiley Periodicals, Inc.

Association of protein intakes and variation of diet-scalp hair XXXX isotopic discrimination factor in Papua New Guinea highlanders.

@entity1 :: ('9606', 'Species') :: ['participants', 'humans', 'human'] @entity1568 :: ('MESH:D009584', 'Chemical') :: ['nitrogen'] @entity1133 :: ('MESH:D014508', 'Chemical') :: ['urea'] @entity3689 :: ('D000596', 'Chemical') :: ['amino acid'] @entity13140 :: ('CHEBI:36934', 'Chemical') :: ['(15) N']
@entity1568 :: (MESH:D009584,Chemical) :: ['nitrogen']
