Hellenistic glass is the typical "'soda-lime-silica glass "', to which lime was not intentionally added, but it was provided through the agent of sand.
22.
Amongst the samples of iron, cindery material and silica glass that Philby brought back from the site was a 25 lb chunk of iron.
23.
It will be easier for astronauts to patch holes in the thermal silica glass fiber tiles that cover the rest of a shuttle, Poulos said.
24.
As for the silica glass fiber tiles that cover much of each shuttle, engineers initially thought they had a good putty-type repair method on hand.
25.
Step-index optical fiber is generally made by doping high-purity fused silica glass ( SiO 2 ) with different concentrations of materials like titanium, germanium, or boron.
26.
The glasses from this period contain high levels of barium oxide ( BaO ) and lead, distinguishing them from the soda-lime-silica glasses of Western Asia and Mesopotamia.
27.
NASA was checking the carbon panel and the silica glass-fiber thermal tiles for evidence of burning, either from the intense heat of re-entry or from something else.
28.
Since the February disaster, NASA has made considerable progress in devising a technique to fix holes in the silica glass fiber tiles that cover much of each shuttle.
29.
The silica glass structure ( that is, the conformation of its atomic structure ) is shaped in such a way that it allows Na + ions some mobility.
30.
Most photonic crystal fibers have been fabricated in silica glass, but other glasses have also been used to obtain particular optical properties ( such as high optical non-linearity ).
