Strontium uptake

Roca, M.C., and Vallejo, V.R., 1995, Effect of soil potassium and calcium on caesium and strontium uptake by plant roots. J. Environ. Radioac. 28 141-159. 

Shaw, G., 1993, Blockade by fertilisers of caesium and strontium uptake into crops effects on the root uptake process. 5ci. Total Environ. 137 119-133. 

Fig. 7-15. (a) Hyperbolic absorption isotherm for strontium uptake in wheat (Triticum aestivum). This gives rise to the negative and non-linear relationship between the transfer factor and external concentration of strontium shown in (b) (from Hewamanna, previously unpublished). 

Tuominen, Y. (1967). Studies of the strontium uptake of the Cladonia alpestris thallus. Annales BotaniciFennici, 4, 1-28. 

Lea D. W., Mashiotta T. A., and Spero H. J. (1999) Controls on magnesium and strontium uptake in planktonic foraminifera determined by live culturing. Geochim. Cosmochim. Acta 63, 2369-2379. 

The uptake and incorporation of other elements, magnesium or strontium, in the calcite have been investigated and shown the bioavailability of these elements. In modem ocean waters, the content and range of magnesium in biotic and abiotic deposited minerals were virtually identical in studies by Carpenter and Lohmann (1992). However, there was a more rapid strontium uptake in the calcium-rich biomineral. The composition of the calcium carbonate mineral deposited is a function of kinetics and related to the metabolism of the organism. 

Friedman M, Hirschfeld Z. 1982. EDTA enhancement of strontium uptake by intact human enamel. J Oral Rehabil 9 327-333. 

Gedalial. 1975. Strontium uptake by the developing femur bone and deciduous dentition. J Dent Res 54 B125-B130. 

Karaki H, Nakagawa H, Urakawa N. 1986. Strontium uptake during the different modes of contraction in the smooth muscle of rabbit aorta, rat aorta and guinea-pig taenia coli. Arch Int Pharmacodyn 282 93-107. 

Sugihira N, Aoki Y, Suzuki KT. 1992. ATP-dependent strontium uptake by basolateral membrane vesicles from rat renal cortes in the absence of presence of calcium. Biol Trace Elem Res 34 45-54. 

The strontium uptake of plants parallels that of calcium and may be of some practical significance in view of the long half-life of certain radioactive isotopes of strontium (Mitchell 1957, Schilling 1960). Uptake by... 

Very few investigations have dealt with the uptake of stable Sr " " and its possible effects on plant growth. Isermann (1981) reported, in an extended review of strontium uptake by plants and its effects on plant growth, that strontium is not primarily toxic to higher plants in the presence of calcium. Furthermore, it has some beneficial effect on cell integrity and permeability, on the net uptake of essential plant nutrients, and on respiration. Weinberg (1977) reported that for amylase, when strontium was substituted for calcium, the enzyme had full activity but varied in some physical properties. 

The distribution of strontium is similar to that of calcium, which means that 99% of the body burden is deposited in bone (Table 1) [45-57]. In healthy adult male volunteers, the volume of distribution was estimated at 64—71 liters [58,59]. In vitro studies of strontium uptake in bone indicate that strontium is incorporated by ion exchange with calcium [60,61]. The preference of hydroxyapatite crystals to bind calcium rather than strontium seems mainly due to the larger size of the strontium ion, which produces a mild distortion of the crystal lattice and thus probably results in a weaker binding of strontium to the components of the hydroxyapatite crystal [62]. Within long bones, strontium is preferentially deposited in the shafts [63]. 

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