Alkaline earth elements and alkali metals (Mg, Ca, Na and K) play an important role in the geochemical evolution of saline lakes as the final brine type is defined by the abundance of these elements. The role of major ions in brine evolution has been studied in great detail, but little has been done to investigate the behaviour of minor alkali elements in these systems despite their similar che...

We present a theoretical study of the defect properties of pure and anion deficient strontium chloride. We examine intrinsic defects obtaining an anion Frenkel enthalpy in good agreement with experimental values. We show that alkali cation interstitials are important at low temperatures in monovalent doped crystals.

1. Depolarization of embryonic chick myotubes from negative potentials elicits a rapid spike followed by a long-duration after-potential. The ionic basis of the long-duration after-potential was examined by making intracellular recordings from cultured myotubes, and by making whole-cell patch-clamp recordings from myoblasts and myoballs. 2. The peak potential of the long-duration after-potentia...

The Baltic Sea is one of the most contaminated seas by the radioactive isotope of strontium in the world; therefore the activity of ⁹⁰Sr is regularly controlled. Due to that fact, seawater samples for ⁹⁰Sr determination were collected at 16 stations located in the southern Baltic Sea between 2005 and 2010. In this period average activity of ⁹⁰Sr was 7.8 Bq m⁻³ and varied within the range from 3...

The results from this study illustrate the first time electrospray ionization-ion mobility spectrometry (ESI-IMS) has been used to separate inorganic cations in aqueous solutions. Using ESI-IMS nine inorganic cation solutions were analyzed. Counter ions affected both the sensitivity and the identity of the response ions. Aluminum sulfate, lanthanum chloride, strontium chloride, uranyl acetate, ...

In a previous paper (1) it was shown that discrimination against strontium as compared to calcium, in the formation of synthetic hydroxyapatite, Calo(POJ)6(OH)2, was greater in large, more slowly grown crystals than in small, more rapidly precipitated crystals. The exclusion of strontium as compared to calcium in the hydroxyapatite crystals increases as the preparation conditions approach equil...

STUDY QUESTION Does the application of three different artificial activating stimuli lead to a difference in pre- and post-implantation embryo development in the wobbler mouse, a mouse model with oocyte activation deficient round-headed sperm cells similar to human globozoospermia? SUMMARY ANSWER No gross differences were found between strontium chloride, electrical pulses or ionomycin with r...

Calcium absorption tests have rarely been validated for being representative for absolute bioavailability (true absorption) or for intraindividual variation. Therefore, we investigated the reproducibility of the absolute bioavailability of strontium chloride, a marker for intestinal calcium absorption, in healthy male volunteers (n = 8) by measuring the area under the plasma strontium concentra...

A large part of the strontium-go from fallout that reaches man is from fallout on vegetation, and any process affecting its absorption by animals affects its transfer to man. The 90Sr content of vegetation comes from two sources, that in the soil from previous fallout which is incorporated through the roots into the plant tissue, and that from current fallout producing a surface contamination o...