نتایج جستجو برای: earths
تعداد نتایج: 1434 فیلتر نتایج به سال:
a simple, sensitive and selective method for solvent extraction and spectrophotemetric determination of lanthanum (ii) europium (iii), and cerium (iii) is described , the rare earth metals are extracted into chloroform solution of n-phenylbenzohydroxamic acid (pbha) at ph 9-10 various parameters are studied to optimize the extraction conditions. the molar absorptivity is found to increase from ...
A sequence of eight twice-daily meals, each marked with different rare earth elements, was fed to 24 Spanish goats (BW = 20.6 +/- 1.94 kg) to produce meal-based profiles of rare earth markers within segments of the gastrointestinal digesta on subsequent slaughter. Accumulative mean residence time and time delay of rare earths and segmental and accumulative mean residence times of indigestible N...
The radial density of planets increases with depth due to compressibility, leading impacts on their convective dynamics. To account for these effects, including the presence a quasi-adiabatic temperature profile and entropy sources dissipation, compressibility is expressed through dissipation number, $\mathcal{D}$, proportional planet's radius gravity. In Earth's mantle, effects are moderate, b...
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