Digestion process ofMicrosporum cookei spore wall by snail enzyme: Scanning electron-microscopic examination

1970 ◽  
Vol 26 (7) ◽  
pp. 801-803 ◽  
Author(s):  
Y. Nozawa ◽  
Y. Ito
Keyword(s):  
Microscopic Examination ◽  
Electron Microscopic Examination ◽  
Spore Wall ◽  
Electron Microscopic ◽  
Digestion Process ◽  
Scanning Electron Microscopic ◽  
Snail Enzyme ◽  
Scanning Electron

Developmental Disturbances of the Rat Molar Induced By Two Diphosphonates

1989 ◽  
Vol 3 (2) ◽  
pp. 234-240 ◽  
Author(s):  
N. Fouda ◽  
M. Caracatsanis ◽  
L. Hammarstrom
Keyword(s):  
Microscopic Examination ◽  
Alveolar Bone ◽  
Morphological Changes ◽  
Electron Microscopic Examination ◽  
Enamel Matrix ◽  
Electron Microscopic ◽  
Developmental Disturbances ◽  
Scanning Electron Microscopic ◽  
Rat Molar ◽  
Scanning Electron

Very few reports have been published about the effects of diphosphonates on the cells and tissues of developing teeth. The present study was designed to investigate possible morphological changes in ameloblasts and odontoblasts and relate these changes to defects in the enamel surface of erupted teeth. Young rats were injected subcutaneously with single or multiple doses of HEDP or Cl2MDP (10 mg P/kg b.w.). Light microscopic examination of developing maxillary first molars showed that single injections of HEDP or Cl2MDP induced subameloblastic cysts between the secretory ameloblasts and the developing enamel. The ameloblastic lining of the cysts contained numerous calcified deposits. A few days after injection, hypoplasias were seen in the enamel in areas previously occupied by cysts. In the erupted teeth, scanning electron microscopic examination revealed enamel hypoplasias which were mainly localized on the mesial sides of the cusps. In addition to the previously mentioned disturbances, multiple injections resulted in more extensive cysts, some of which contained non-mineralized enamel matrix. Inhibition of the mineralization of dentin and alveolar bone was also noticed.

Etude des ectomycorhizes de Dryas octopetala. Obtention de synthèses mycorhiziennes et de carpophores d’Hebeloma alpinum et H. marginatulum

1981 ◽  
Vol 59 (6) ◽  
pp. 1014-1020 ◽  
Author(s):  
J. C. Debaud ◽  
R. Pepin ◽  
G. Bruchet
Keyword(s):  
Microscopic Examination ◽  
Electron Microscopic Examination ◽  
Point Of View ◽  
Symbiotic Association ◽  
Electron Microscopic ◽  
Mycorrhizal Synthesis ◽  
Alpine Area ◽  
Dryas Octopetala ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

The mycorrhizal synthesis between Dryas octopetala L. and two Agaricales from alpine area: Hebeloma alpinum (Favre) Bruchet and Hebeloma marginatulum (Favre) Bruchet, have been produced in the laboratory. Both fungi yielded normal fructification after 8 months in culture. After light and scanning electron microscopic examination, macro- and microscopical features of these mycorhizae are described. This symbiotic association, existing in the field between D. octopetala and those fungi typical of the alpine area, is discussed from an ecological point of view.

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