Perforation Plate Development in Knightia excelsa R. Br. : A Scanning Electron Microscope Study

1972 ◽  
Vol 20 (1) ◽  
pp. 79 ◽  
Author(s):  
BA Meylan ◽  
BG Butterfield
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Microscope Study ◽  
Secondary Wall ◽  
Electron Microscope Study ◽  
Middle Lamella ◽  
Scanning Electron Microscope Study ◽  
Perforation Plate ◽  
Perforation Plates ◽  
Scanning Electron

The development of perforation plates in the vessels of Knightia excelsa R. Br. is described. The primary walls and middle lamella in the region of the perforation remain intact late in the differentiation of the adjoining vessel members. Only after the secondary wall has been laid down, forming prominent borders over this perforation partition, does the latter show any sign of degeneration. The breakdown process involves a change in the nature of the partition, which becomes granular in appearance. Small holes then develop in it before its final disappearance.

Scalariform Perforation Plate Development in Laurelia novae-zelandiae A. Cunn. : A Scanning Electron Microscope Study

1972 ◽  
Vol 20 (3) ◽  
pp. 253 ◽  
Author(s):  
BG Butterfield ◽  
BA Meylan
Keyword(s):  
Electron Microscope ◽  
Secondary Wall ◽  
Electron Microscope Study ◽  
Middle Lamella ◽  
Scanning Electron Micrographs ◽  
Scanning Electron Microscope Study ◽  
Perforation Plate ◽  
Enzymatic Action ◽  
Perforation Plates ◽  
Scanning Electron

The development of the scalariform perforation plates in Laurelia novae- zelandiae A. Cunn. is described and illustrated with scanning electron micrographs. The primary walls and middle lamella in the areas to be perforated remain intact late in the differentiation of .the adjoining vessel members. After the secondary wall has beenlaid down on other areas of the vessel member walls, the perforation partitions are broken down by an enzymatic action on the surface of the partitions. This process leaves a network of fibrils which later disappear, possibly by the action of the transpiration stream.

Scanning Electron Microscope Study of Root Canal Filling (First Report)

1987 ◽  
Vol 41 (6) ◽  
pp. 1238-1243
Author(s):  
Yohichiroh Soh ◽  
Junroh Tahara ◽  
Takashi Hayashikawa ◽  
Masatoshi Hitaka ◽  
Kohzoh Kubota ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Root Canal ◽  
Microscope Study ◽  
Electron Microscope Study ◽  
Root Canal Filling ◽  
Scanning Electron Microscope Study ◽  
First Report ◽  
Scanning Electron
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