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Articles by H. Morovvati
Total Records ( 2 ) for H. Morovvati
  M. Khaksary Mahabady , H. Morovvati and K. Khazaeil
  The morphology of lingual papillae of 10 healthy young adult Iranian buffaloes was studied by using light microscopy. It could be divided into three areas: the lingual apex, lingual body and lingual root. Filiform, conical, fungiform and lenticular papillae were considered as mechanical papillae but circumvallate papillae were considered as gustatory papillae. No foliate papillae were seen on the dorsal surface. Filiform papillae were distributed over the entire dorsal surface of the tongue, with the filiform papillae on torus linguae shaped as caudally directed pointed spines or conical shape. The convex surfaced fungiform papillae were raised above the lingual mucosa. The conical papillae are blunt pointed cone shape. Lenticular papillae were distributed on the torus linguae. The oval shape circumvallate papillae were located on the lateral and caudal part of torus linguae. A few taste buds were observed in the lateral epithelium of the papillae. The lingual papillae of the Iranian buffalo (Bubalus bubalus) exhibited some characteristics different from those of domestic ruminants.
  A.A. Movahedinia , A. Savari , H. Morovvati , P. Koochanin , J.G. Marammazi and M. Nafisi
  To determine the variation pattern of apical openings in mitochondrial-rich cells, short term and long term exposure to different salinities was studied. The results obtained suggest that morphological adaptations of mitochondria-rich cells reflect the animal's ionic and osmotic requirements. Yellowfin seabream, Acanthopagrus latus, are capable of tolerating direct exposure of salinities from 5 to 60‰ without showing mortalities. This species was also able to tolerate gradual decrease in salinity in the surrounding medium from seawater to freshwater through a period of 10 days and successfully adapt to freshwater without showing mortality. This is the shortest period reported in a true marine fish for adaptation to freshwater through an acceptable experimental duration. Three subtypes of mitochondria-rich cells were detected in photomicrographs created from scanning electron microscope; shallow basin, deep hole and wavy convex mitochondria-rich cells. After decrease in salinity to 20‰ the apical membrane of mitochondria-rich cells showed changes in morphology and on day 7 most of the mitochondria-rich cells were of the wavy convex or shallow basin subtypes. However, on day 21 they returned to their original state prior to changes in salinity. When transferred to hypoosmotic medium (5‰ and FW), rapid responses were exhibited in the apical membrane of mitochondria-rich cell which stabilized after 21 days and all subtypes of mitochondria-rich cells were observed in photomicrographs of gill filaments. Seabream transferred to 20‰ and hypoosmotic environments showed rapid decrease in mitochondria-rich cells, which was restored to normal levels as those in seawater within 7 days.
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