To evaluate the patient, disease, and tumor characteristics of the 3 morphologically distinct groups of vitreous seeds in retinoblastoma presenting for treatment with ophthalmic artery chemosurgery (OAC): dust (class 1), spheres (class 2), and clouds (class 3) in primary and recurrent vitreous seeds.
Cream in your milk and butter piled high on toast give the extra you need to take you out of the dry-as-dust class".
"In the old one, the kids breathe coal dust in class".
Samples typically exhibited overpressures of 5 7 bar, and deflagration index KSt = V1/3 (dP/dt)max ∼ 10 80 bar m/s, which places these materials in European Dust Explosion Class St-1.
SCE used a totally enclosed 20 liter (L) chamber, flame from a 10,000 J (10 kJ) ignition source, reported that gin dust was a class 'A' explosible dust.
Of the 45 specific occupational exposures grouped into six classes (dusts, coal products, printing, paints, metals and miscellaneous), only exposure to diesel exhaust fumes showed an association with NHL (Table 4).
Many widely available and/or easily obtainable laboratory or commercial appliances can be used to generate mineral aerosols, and several distinct classes of dust generators (fluidization devices, dustfall chambers, rotating drums/tubes) are used for geological particulate studies.
When choosing a specific instrument, investigators must consider some important caveats: different classes of dust generators characterize different properties (complete collection of a small puff of aerosol versus sampling of a representative portion of a large aerosol cloud) and physical processes (resuspension of deposited dust versus in situ production of dust).
Students spent their days in cramped classes on dust or gravel floors, having to memorize lessons for lack of paper.
George Orwell thought books gave off "more and nastier dust than any other class of objects yet invented".
