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Showing 1 to 20 of 320 for “"Strontium"”.
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Recrystallisation Of Strontium Titanate
The recrystallisation rate of amorphous strontium titanate is dramatically enhanced by thermal annealing in water vapour as compared with a dry ambient. Time resolved optical reflectivity (TRR) has been combined with Rutherford backscattering spectrometry (RBS) and ion channelling to investigate …
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A cold strontium Rydberg gas
… an alkaline earth metal, in this particular case strontium. We have studied a wide range of Rydberg states, and have developed a sensitive ``step-scan" spectroscopic technique that detects the spontaneous ionization of the Rydberg gas. The step-scan method is used to acquire Stark maps, and these …
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Strontium in Drinking Water: Assessing Strontium as a Drinking Water Contaminant in Virginia Private Wells
… unaware of the quality of their drinking water. Strontium is a water quality contaminant gaining recognition at the federal level. At concentrations >1.5 mg/L, strontium substitutes calcium in the bones leading to bone density disorders (e.g. rickets). This is particularly problematic for …
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Strontium and samarium diffusion in diopside
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1982.
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The rubidium-strontium geochronology of argillaceous sediments
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1962.
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Use of biotite for strontium age measurements
Thesis. (Ph.D.) Massachusetts Institute of Technology. Dept. of Geology, 1951.
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Calcium and strontium ionic flux of lipid bilayers
Bilayer lipid membranes were formed from lecithin,. cerebroside, ceramide and tripalmitin. The electrical potential across the lecithin and cerebroside membranes were measured in the presence of Na+, Ca++ and Sr++, and from these membrane specific resistance, transference number and ionic flux were …
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461nm laser for studies in ultracold neutral strontium
… for the purposes of studying ultracold neutral strontium. The dipole-allowed 1 S0 → 1P1 transition at 460.862 nm can be used in laser cooling and trapping; optical imaging, Zeeman slowing, and photoassociative spectroscopy. We produce light at this wavelength by converting infrared light at …
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The strontium isotopic composition and origin of carbonatites
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1962.
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Studies in the synthesis of n-butyl strontium
1. Strontium does not easily react with n-butyl bromide in ether or benzene to produce an organostrontium compound. Strontium amalgam reacts to give a trace of the butyl mercury compound, perhaps through the formation of an organostrontium compound as intermediate. 2. The conversion, 2BuLi + SrCl₂ …
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Synthesis and Characterization of Methylammonium Strontium Bromide Hybrid Perovskite
… Sr-containing hybrid perovskite, methylammonium strontium bromide (MASrBr3). We report on the preparation of MASrBr3 thin films and studied the effects of annealing temperature, annealing time, and precursor solution concentration on crystal growth using XRD and UV-Vis spectroscopy. The …
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Caesium and strontium exchange at specific clay mineral sites
The sorption of caesium and strontium onto clay minerals by exchange with other, charge compensating cations was studied by batch experiments. It was demonstrated that, for clay minerals with a net negative charge arising from isomorphous substitution within the crystal lattice, caesium and …
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Strontium isotope tracing of prehistoric human mobility in France
… This research project explores the use of strontium isotope ratios (87Sr/86Sr) to trace prehistoric human mobility patterns. Strontium isotope ratios vary across the landscape based on the age and composition of the underlying geology. Through diet humans incorporate strontium into their …
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Phase formation and structural transformation of strontium ferrite SrFeOx
Non-stoichiometric strontium iron oxide is described by an abbreviated formula SrFeOx (2.5 ≤ x ≤ 3.0) exhibits a variety of interesting physical and chemical properties over a broad range of temperatures and in different gaseous environments. The oxide contains a mixture of iron in the trivalent …
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