The present invention is drawn to the use of alkanes that are highly transparent to UV wavelengths ranging from about 170 nm to 260 nm in optical couplants, optical cements, optical elements, optical inspection media for semiconductor wafers and devices, and immersion photolithography, particularly at 193 and 248 nm exposure wavelength.

 
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> Jet fuel compositions

> Process for the production of propylene from a feed comprising olefins containing four and/or five carbon atoms with co-production of desulphurized gasoline with a high octane number

~ 00543