PubMed · 14786747
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V MARIN SANCHEZ. 1950. [Veritol test in thoracic surgery].. https://pubmed.ncbi.nlm.nih.gov/14786747/
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Starting from the developmental work of Dittgen and co-workers [1] and of Gröning [2], the authors constructed an air-suspension device which permits to coat crystals, granules and pellets on a laboratory scale. The device developed is a glass apparatus for coating almost 10 g of particles. The motion of the particles to be coated is characterized by a high-speed rotation on a circular orbit associated with a raise by the air current and a fall caused by gravity. This combined motion prevents the development of zones of varying particle sizes. The usefulness of this apparatus is demonstrated by the example of the application of a polyacrylate depot coating to pholedrine sulphate and quinidine sulphate pellets. Scanning electron micrographs are used for the optical assessment of the coating.
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