+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Unequal distribution of a stable isotopic calcium tracer between casein and whey fractions of infant formulas, human milk and cow's milk

, : Unequal distribution of a stable isotopic calcium tracer between casein and whey fractions of infant formulas, human milk and cow's milk. Journal of Nutrition 120(12): 1672-1676

Measurement of calcium absorption with tracers assumes a complete equilibration of tracer with milk calcium. In this study, the equilibration of tracer between the micellar casein and soluble fractions (primarily whey) of infant formulas, human milk and cow's milk was measured in vitro using milk samples enriched with 42Ca and analyzed by thermal ionization mass spectrometry. Incomplete equilibration of tracer occurred with the micellar casein fraction of all milks. The least equilibration with micellar casein was found with premature infant formula, for which the ratio of slopes of the equilibration lines (whey/casein) was 8.5/1. These differences may be due to Ca-casein binding in cow's milk-based formulas. The effects of the lack of tracer equilibration in vivo cannot be determined. However, unequal bioavailability of casein- vs. whey-bound Ca may exist.


PMID: 2262813

Other references

Zastrow, F.; Buchholz, B.; Lison, A.E.; Gottschalk, I.S., 1982: Gastrointestinal complications following kidney transplant. Die Medizinische Welt 33(24): 883-884

Meijer, W.J.; Horcajadas, J.A.; Salas, M., 2001: Phi29 family of phages. Continuous research spanning more than three decades has made the Bacillus bacteriophage phi29 a paradigm for several molecular mechanisms of general biological processes, such as DNA replication, regulation of transcription, phage morphogenesis,...

Syrett, Pj, 1987: Nitrogen assimilation by eukaryotic algae. Inorganic nitrogen metabolism edited by W R Ulrich: 1

Dreyfuss, F.; Librach, G., 1952: Cold precipitable serum globulins in subacute bacterial endocarditis. Globulins precipitating spontaneously at 4[degree]-11[degree]C were found in 61.6% of 180 sera examined in 50 cases of subacute bacterial endocarditis, only 8 of the 50 cases failing to show such a globulin at any time during the observed course....

Pastor, F.J.; Guarro, J., 2008: Alternaria infections: laboratory diagnosis and relevant clinical features. The genus <i>Alternaria</i> contains several species of melanized hyphomycetes that cause opportunistic human infections. The published literature contains 210 reported cases of human alternarioses between 1933 and the present day. The...

Macpherson, C.F.; Shek, R.P.; Pay, P., 1973: Immunochemical analysis of rat brain microsomes. Immunochemistry 10(6): 409-415

Mueller-Heubach, E., 1969: Prolapsus uteri causing hydronephrosis. Journal of the American Geriatrics Society 17(11): 1055-1063

Favre Duchartre M., 1979: The taxalean theory of angiosperm embryo sac interpretation and some of its developments. The morphology of the central cells [egg cells caped with neck-cells synergids] fits with their secretory function and with the chrono-cyto-morphologic comportments of angiosperm embryos and endosperms.

Chingle, M.P.; Odunze, P.A.; Mohammed, A.; Bitto, T.T.; Sodipo, O.Y.; Zoakah, A.I., 2017: Predictors of male condom utilization in Plateau State, Nigeria. Nigerian men play major roles in the reproductive decision-making process, including issues concerning fertility. Despite efforts made by the government to reduce the incidence of HIV by using condom as a means of dual protection, the utilization...

Kim, D.W.; Lee, E.J.; In, H.S.; Kim, S.J., 2011: Sonographic differentiation of partially cystic thyroid nodules: a prospective study. There is no prospective study related to the sonographic differentiation of malignant PCTN from benign PCTN. This prospective study was designed to evaluate differentiation of benign from malignant PCTNs with thyroid sonography. Two hundred thirte...