نتایج جستجو برای: forsterite
تعداد نتایج: 553 فیلتر نتایج به سال:
Introduction: Forsteritic (Mg2SiO4, Fo) and fayalitic (Fe2SiO4, Fa) olivines exist as micron-sized dust grains in a variety of astrophysical and planetary environments. While an estimated ~ 95% of the silicate material that dominates the interstellar medium by mass is assumed to be amorphous [1], crystalline silicate dust particles are known to be present in dust disks around main-sequence star...
We demonstrate rapid switching between picosecond and femtosecond operational regimes in a Cr(4+):forsterite laser, using an electrically-contacted GaInNAs SESAM with saturable absorption characteristics controlled via the quantum-confined Stark effect. Additionally, continuous picosecond pulse duration tuning by over a factor 3 is reported.
Despite excellent bioactivity of bioactive ceramics such as hydroxyapatite, their clinical applications have been limited due to their poor mechanical properties. Using composite coatings with improved mechanical properties could be a solution to this problem. Therefore, the strength of metal substrate and the bioactivity of the improved composite coating combined could yield suitable results. ...
In chloroethene-contaminated sites undergoing in situ bioremediation, groundwater acidification is a frequent problem in the source zone, and buffering strategies have to be implemented to maintain the pH in the neutral range. An alternative to conventional soluble buffers is silicate mineral particles as a long-term source of alkalinity. In previous studies, the buffering potentials of these m...
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