BACKGROUND The anomalous properties of water have been of great interest for generations of scientists. However the impact of small amount of deuterium content which is always present in water has never been explored before. For the first time the fundamental properties of deuterium depleted (light) water at 4°C and 20°C are here presented. RESULTS The obtained results show the important role...

Abstract Dynamic models of solar system evolution suggest that D-type asteroids formed beyond Saturn's orbit and represent invaluable witnesses the prevailing conditions in outer system. Here, we report a comprehensive petrographic isotopic characterization carbonaceous chondrite Tarda, recent fall recovered Moroccan Sahara. We show Tarda shares strong similarities with D-type-derived Tagish La...

Improving our knowledge on the relative contribution of irrigation water, precipitation, and groundwater to tree transpiration is necessary for an efficient sustainable use water resources in agriculture. For this purpose, we applied deuterium (2H) enriched trace uptake by apple trees under field pot conditions. 2H-enriched was supplied Alpine valley mimicking sprinkler irrigation. Labeled infi...

Two stations of rainfall sampling and measurements of meteorological parameters were used in this study. The first one, located in Algiers, is under Mediterranean climatic influence. The second one, located in the Ahaggar massif, in the middle of Sahara desert, is subject to the extreme inflow of African western monsoon. In Algiers, the mean isotopic contents of precipitation [δO= -5‰; δ H= -28...

Abstract In this study, the influence of varying temperatures on transport behavior conservative solutes in heterogeneous porous media has been investigated. Column flow experiments employing potassium bromide as tracer were conducted at four temperature levels (3°C, 10°C, 20°C, and 30°C) measured electrical conductivity (EC) signal was interpreted through inverse modeling. Additional performed...

Among all isotopes those which would be expected to show the greatest differences from the original element are the isotopes of hydrogen. The addition of one or two protons to a relatively large atom is an insignificant change in comparison with that undergone by the transformation of hydrogen to its nearest isotope, deuterium, for here the extra proton practically doubles the mass. In fact deu...

Increased calcium uptake in vascular tissue, leading to elevated cytosolic free calcium, has been implicated in the pathophysiology of hypertension. This study examined the dose-dependent effect of deuterium oxide (5%, 10%, or 20% in drinking water) on systolic blood pressure, aortic calcium uptake, and platelet cytosolic free calcium in spontaneously hypertensive rats. Starting at age 8 weeks,...

To examine the validity of the deuterium (D) incorporation technique for measurement of human cholesterol synthesis rates, D uptake from D2O into cholesterol was compared to sterol balance in 13 subjects each under three controlled diet settings. Subjects (age 62 +/- 3.6 yr, body weight 74 +/- 4.0 kg, BMI 27 +/- 1.4) consumed weight maintenance diets enriched in either corn oil, beef tallow, or...