Macroanatomic, light and scanning electron microscopic structure of the pecten oculi in northern bald ibis ( Geronticus eremita )

2020 ◽  
Author(s):  
Bestami Yilmaz ◽  
Ismail Demircioglu ◽  
Deniz Korkmaz ◽  
Aydın Alan ◽  
Rahsan Yilmaz ◽  
...  
Keyword(s):  
Microscopic Structure ◽  
Electron Microscopic ◽  
Scanning Electron Microscopic ◽  
Geronticus Eremita ◽  
Pecten Oculi ◽  
Scanning Electron

scholarly journals Scanning Electron Microscopic Studies of the Pecten Oculi in the Quail (Coturnix coturnix japonica)

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Aris F. Pourlis
Keyword(s):  
Functional Anatomy ◽  
Physiological Role ◽  
Coturnix Japonica ◽  
Electron Microscopic ◽  
Coturnix Coturnix ◽  
Scanning Electron Microscopic ◽  
Microscopic Studies ◽  
Pecten Oculi ◽  
Scanning Electron

The main purpose of this study is to extend the microscopic investigations of the pecten oculi in the quail in order to add some information on the unresolved functional anatomy of this unique avian organ. The pecten oculi of the quail was studied by scanning electron microscopy. Eighteen- to-twenty two highly vascularised accordion-like folds were joined apically by a heavily pigmented bridge of tissue, which holds the pecten in a fanlike shape, widest at the base. The structure of the double layered limiting membrane was recorded. The presence of hyalocytes with macrophage-like appearance was illustrated. It is assumed that the pecten oculi of the quail resembles that of the chicken. Illustrated morphological features of this species may add information on the active physiological role of the pecten. But still, the functional significance of this organ is a matter of controversies.

Scanning Electron Microscopic structure and function of the fore-gut of Indian fresh water prawn, Macrobrachium lamarrei H.M. Edwards (Decapoda-Palaemonidae)

1990 ◽  
Vol 48 (3) ◽  
pp. 516-517
Author(s):  
Sanjive Shukla ◽  
U. D. Sharma
Keyword(s):  
Buccal Cavity ◽  
Structure And Function ◽  
Microscopic Structure ◽  
Luminal Surface ◽  
Gastric Mill ◽  
Electron Microscopic ◽  
Cardiac Stomach ◽  
Scanning Electron Microscopic ◽  
And Function ◽  
Scanning Electron

The fore-gut structure of certain crustaceans is well documented. However, data on palaemonidae are scanty. The present work has been carried out on the ultrastructure of the fore-gut in relation to feeding and food movements in M. lamarrei, an omnivorous animal. The fore-gut was dissected out and slit open in various individuals for SEM studies and processed. Samples were observed under an SEM (JEOL JSM 35C) and photographed.The number, size, shape, and arrangement of bristles vary in different zones, which is devoid of gastric mill. Bristles are either simple or compound, and are present in groups at the entrance of the esophagus from the buccal cavity, on esophageal folds, and on the wall and floor of the cardiac stomach (Figs. 1-10). The simple smallest bristles (35-53 μm) are on the esophageal folds; simple as well as compound bristles (275 μm) are present on the cardiac luminal surface.

Scanning Electron Microscopic Study of the Cell Surface

1969 ◽  
Vol 27 ◽  
pp. 36-37 ◽  
Author(s):  
Toichiro Kuwabara
Keyword(s):  
Tissue Fluid ◽  
Biological Application ◽  
Biological Structure ◽  
Electron Microscopic ◽  
Surface Appearance ◽  
Minute Amount ◽  
Scanning Electron Microscopic Study ◽  
Scanning Electron Microscopic ◽  
True Structure ◽  
Scanning Electron

Although scanning electron microscopy has a great potential in biological application, there are certain limitations in visualization of the biological structure. Satisfactory techniques to demonstrate natural surfaces of the tissue and the cell have been reported by several investigators. However, it is commonly found that the surface cell membrane is covered with a minute amount of mucin, secretory substance or tissue fluid as physiological, pathological or artefactual condition. These substances give a false surface appearance, especially when the tissue is fixed with strong fixatives. It seems important to remove these coating substances from the surface of the cell for demonstration of the true structure.

A scanning electron microscopic study on dissolving process of cholesterol gallstones by chenodeoxycholic acid (CDCA)

1978 ◽  
Vol 36 (2) ◽  
pp. 522-523
Author(s):  
T. Kanetaka ◽  
M. Cho ◽  
S. Kawamura ◽  
T. Sado ◽  
K. Hara
Keyword(s):  
Electron Microscope ◽  
Chenodeoxycholic Acid ◽  
Outer Surface ◽  
Electron Microscopic ◽  
Cholesterol Gallstones ◽  
The Core ◽  
Scanning Electron Microscopic Study ◽  
Scanning Electron Microscopic ◽  
Acceleration Voltage ◽  
Scanning Electron

The authors have investigated the dissolution process of human cholesterol gallstones using a scanning electron microscope(SEM). This study was carried out by comparing control gallstones incubated in beagle bile with gallstones obtained from patients who were treated with chenodeoxycholic acid(CDCA).The cholesterol gallstones for this study were obtained from 14 patients. Three control patients were treated without CDCA and eleven patients were treated with CDCA 300-600 mg/day for periods ranging from four to twenty five months. It was confirmed through chemical analysis that these gallstones contained more than 80% cholesterol in both the outer surface and the core.The specimen were obtained from the outer surface and the core of the gallstones. Each specimen was attached to alminum sheet and coated with carbon to 100Å thickness. The SEM observation was made by Hitachi S-550 with 20 kV acceleration voltage and with 60-20, 000X magnification.

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