Abstract In this study, sound absorbing materials were produced through foam forming technique using hardwood and softwood pulps with varying chemical composition, ultrastructural, morphological properties as raw materials. The absorption of the foams measured related to ultrastructure morphology pulp fibres. All fibre provided comparable those conventional porous used for acoustic purposes. ge...

Five canine cutaneous histiocytomas were studied by electron microscopy and esterase cytochemistry. The tumor cells contained irregular nuclei, characteristic lysosomal granules, and perinuclear microfilaments. The cells showed activity with anaphthyl acetate esterase stains. These characteristics are evidence that this tumor originates from the mononuclear phagocyte system. Canine cutaneous hi...