In case of nuclear accident, 90Sr and 134,137Cs are major radionuclides to account. previous works (Appl. Geochem. 87, 167; ibid 93, 167), a database ion-exchange parameters allowing the description Sr2+ Cs + adsorption on purified illite smectite was developed for multi-site (MSIE) model. this study, behaviours Cs+ were obtained with <150 ?m fractions French soil samples: cambisol fluvic, calc...

Among the possible ionic crosslinkers Ca2+ is most widely used. However, due to its numerous physiological functions, other cations such as Sr2+ may be more suitable depending on application. Because a systematic comparison currently lacking, this work aims compare solutions of CaCl2 and SrCl2 alginate- cellulose-based materials investigate their effects structural biological properties 3D biop...

Inactivation of Ca channels was examined in crab muscle fibres using the voltage-clamp method. A satisfactory suppression of outward currents was attempted by the use of K+ blocking agents: TEA, 4AP and Cs ions instead of K+ ions applied extracellularly. The inactivation of Ca current appeared as a bi-exponential process. The faster component had a mean value of the time constant of 50 ms while...

Nineteen mutants that lost the ability to grow in 100 mM Ca2+ (but remained insensitive to 50 mM Sr2+) were identified in a screen of approximately 60,000 mutagenized yeast colonies. Cells carrying mutations in the CSG2 gene grow normally in low Ca2+ medium but have decreased growth rates when the Ca2+ concentration is above 10 mM. The csg2 mutant cells accumulate much higher levels of Ca2+ in ...

The lesser grain borer Rhyzopertha dominica (F.) is one of the most destructive insect pests of stored grain. This pest has been controlled successfully by fumigation with phosphine for the last several decades, though strong resistance to phosphine in many countries has raised concern about the long term usefulness of this control method. Previous genetic analysis of strongly resistant (SR) R....

The aim of this study was to assess stroke rate variability in elite female swimmers (200-m events, all four techniques) by comparing the semi-finalists at the Athens 2004 Olympic Games (n = 64) and semi-finalists at the French National 2004 Championship (n = 64). Since swimming speed (V) is the product of stroke rate (SR) and stroke length (SL), these three variables and the coefficient of var...

Transmitter release and synaptic vesicle exo- and endocytosis during high-frequency stimulation (20 pulses/s) in the extracellular presence of different bivalent cations (Ca(2+), Sr2+ or Ba2+) were studied in frog cutaneous pectoris nerve-muscle preparations. It was shown in electrophysiological experiments that almost only synchronous transmitter release was registered in a Ca(2+)-containing s...