نتایج جستجو برای: strontium compounds

تعداد نتایج: 233356  

2014
Erik Hennings Horst Schmidt Wolfgang Voigt

The title compounds, strontium perchlorate trihydrate {di-μ-aqua-aquadi-μ-perchlorato-strontium, [Sr(ClO4)2(H2O)3] n }, strontium perchlorate tetra-hydrate {di-μ-aqua-bis-(tri-aqua-diperchloratostrontium), [Sr2(ClO4)4(H2O)8]} and strontium perchlorate nona-hydrate {hepta-aqua-diperchloratostrontium dihydrate, [Sr(ClO4)2(H2O)7]·2H2O}, were crystallized at low temperatures according to the solid-...

Journal: :American Journal of Modern Physics 2022

We use the idea of Wigner probability distribution (WPD) in a reduced scattering phase space (RPS) for elastic cross-section, with help Tight-Binding (TB) numerical procedure allowing us to consider anisotropic quantum effects, phenomenologically predict several phases these two novel unconventional superconductors. Unlike our previous works pieces evidences that compounds are unitary strong re...

Journal: :Biophysical journal 1999
M A Xu-Friedman W G Regehr

Strontium can replace calcium in triggering neurotransmitter release, although peak release is reduced and the duration of release is prolonged. Strontium has therefore become useful in probing release, but its mechanism of action is not well understood. Here we study the action of strontium at the granule cell to Purkinje cell synapse in mouse cerebellar slices. Presynaptic residual strontium ...

Strontium carbonate (SrCO3) is one of the most important strontium compounds that have been used in a variety of technological and industrial applications. In the present investigation, nano-structured strontium carbonate was synthesized by mechano-chemical reaction of celestite ore (SrSO4) collected from Dasht-e kavir, Iran and sodium carbonate during high energy mechanical milling.The milling...

Journal: :Acta Crystallographica Section A Foundations of Crystallography 2011

Journal: :Biointerphases 2013
Julia Kokesch-Himmelreich Matthias Schumacher Marcus Rohnke Michael Gelinsky Jürgen Janek

Commonly used implants for therapeutic approaches of non-systemically impaired bone do not sufficiently support the healing process of osteoporotic bone. Since strontium (II) has been proven as an effective anti-osteoporotic drug new types of strontium enriched calcium phosphate bone cements were developed. As osteoporosis is characterized by an imbalance of osteoblast and osteoclast activity t...

Journal: :Dalton transactions 2012
Phillip Jochmann Julien P Davin Stefanie Maslek Thomas P Spaniol Yann Sarazin Jean-Francois Carpentier Jun Okuda

The synthesis and attempted isolation of neutral bis(allyl)strontium [Sr(C(3)H(5))(2)] (1) resulted in the isolation of potassium tris(allyl)strontiate K[Sr(C(3)H(5))(3)] (2). In situ generated 1 shows a pronounced Brønsted basicity, inducing polymerisation of THF. Ate complex 2 crystallises as [K(THF)(2){Sr(C(3)H(5))(3)}(THF)](∞) (2·(THF)(3)). The salt-like solid state structure of 2·(THF)(3) ...

2010

Characteristics of strontium Strontium was discovered in 1790 in a mine close to the Scottish village Strontian and was isolated in 1808. Strontium is one of the alkaline earth metals and is never found in its free form in nature because it easily oxidises, forming strontium oxide. Strontium, along with calcium and magnesium belongs to group 2 of the periodic table which are divalent cations, w...

2001
I. Galloway

The aim was to investigate the angular dependence of the β-particle backscatter count rate, using a strontium-90 source. In addition the empirical relationship between the atomic number (Z number) of a scatterer and the count rate at a specific angle was investigated along with consideration of how this relationship behaves with simple compounds. Thick samples are used throughout. A brief inves...

2000
K. M. Rabe

Using first-principles calculations based on a variational density functional perturbation theory, we investigate the lattice dynamics of solid solutions of barium and strontium titanates. Averaging the information available for the related pure compounds yields results equivalent to those obtained within the virtual crystal approximation, providing frequencies which are a good approximation to...

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