Modern coal mining has been mechanized for decades, rendering obsolete the image of soot-smeared miners wielding picks and shovels (though miners still bear the unmistakable helmets with lanterns) Today, miners operate computer-driven hydraulic machinery costing hundreds of millions of dollars.
Partial NO2 oxidation and high temperatures during active regeneration modify the morphology of outer particle shells, thus rendering post-DOC and post-DPF primary soot particles less reactive in this respect.
Grayness because of the velvety, overcast drawings he made all his life: extravagantly tonal images of landscapes, farmyards and interiors rendered in a mixture of soot and spit applied to found paper with sticks and rags.
The hot gaseous products, smoke and soot rise under the influence of buoyancy and are rendered using a blackbody radiation model.
Especially in soot-laden spray flames, however, considerable spectral interference cannot be avoided, which renders interpretation of the fluorescence distribution challenging.
