A previously published hydrothermal brine-river water mixing model driven by ocean crust production suggests that the molar Mg/Ca ratio of seawater (mMg/Ca(sw)) has varied significantly (approximately 1.0-5.2) over Precambrian time, resulting in six intervals of aragonite-favouring seas (mMg/Ca(sw) > 2) and five intervals of calcite-favouring seas (mMg/Ca(sw) < 2) since the Late Archaean. To ev...

This study investigated the modulatory effect of magnesium (Mg++) on basal and agonist-stimulated intracellular free calcium (Ca++) concentration ([Ca++]i) in vascular smooth muscle cells from spontaneously hypertensive rats (SHR). Effects of increasing extracellular Mg++ concentration ([Mg++]e) on vasopressin (AVP)-induced [Ca++]i responses were determined in primary cultured unpassaged vascul...

The utility of the Mg/Ca elemental ratio calcite ((Mg/Ca)calcite) as a temperature indicator in continental carbonate deposits is matter debate due to different results obtained by diverse authors. In this study, we aimed test reliability (Mg/Ca)calcite fluvial carbonates. We selected recent tufa stromatolite records four rivers on Iberian Peninsula for trace element analysis based six-monthly ...

In this study, the mineral contents of bread with boiled grape, date, carob and mulberry fruit juices at five different concentrations were determined. The fluctuations of B and Cu contents in bread with pekmez (molasses) were determined between 4.10 to 4.49 mg/kg and 2.74 and 3.34 mg/kg respectively. Ca, Mg, K, P and S were the main macro-elements of bread samples. The highest values of Ca...