Intestinal Absorption of 45 Ca and 89 Sr as Affected By Ca, Sr and Mg
نویسندگان
چکیده
منابع مشابه
Reconstructing past seawater Mg/Ca and Sr/Ca from mid-ocean ridge flank calcium carbonate veins.
Proxies for past seawater chemistry, such as Mg/Ca and Sr/Ca ratios, provide a record of the dynamic exchanges of elements between the solid Earth, the atmosphere, and the hydrosphere and the evolving influence of life. We estimated past oceanic Mg/Ca and Sr/Ca ratios from suites of 1.6- to 170-million-year-old calcium carbonate veins that had precipitated from seawater-derived fluids in ocean ...
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[1] Reliable temperature estimates from both surface and subsurface ocean waters are needed to reconstruct past upper water column temperature gradients and past oceanic heat content. This work examines the relationships between trace element ratios in fossil shells and seawater temperature for surface-dwelling foraminifera species, Globigerinoides ruber (white) and Globigerina bulloides, and d...
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Huang J, Hove-Madsen L, Tibbits GF. SR Ca refilling upon depletion and SR Ca uptake rates during development in rabbit ventricular myocytes. Am J Physiol Cell Physiol 293: C1906–C1915, 2007. First published October 10, 2007; doi:10.1152/ajpcell.00241.2007.— While it has been reported that a sparse sarcoplasmic reticulum (SR) and a low SR Ca pump density exist at birth, we and others have recent...
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[1] Records of seawater chemistry help constrain temporal variations in geochemical processes that impact the global carbon cycle and climate through Earth’s history. Here we reconstruct Cenozoic seawater Sr/Ca (Sr/Casw) using fossil Conus and turritellid gastropod Sr/Ca. Combined with an oxygen isotope paleotemperature record from the same samples, the gastropod record suggests that Sr/Casw wa...
متن کاملSeasonal dripwater Mg/Ca and Sr/Ca variations driven by cave ventilation: Implications for and modeling of speleothem paleoclimate records
A 4-year study in a central Texas cave quantifies multiple mechanisms that control dripwater composition and how these mechanisms vary at different drip sites. We monitored cave-air compositions, in situ calcite growth, dripwater composition and drip rate every 4–6 weeks. Three groups of drip sites are delineated (Groups 1–3) based on geochemical variations in dripwater composition. Quantitativ...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1973
ISSN: 0032-5791
DOI: 10.3382/ps.0521208