Fabrication of Superfine Electron Moiré Grid

2006 ◽  
Vol 326-328 ◽  
pp. 111-114
Author(s):  
Yong Ming Xing ◽  
Satoshi Kishimoto
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Stress Analysis ◽  
High Frequency ◽  
Moire Method ◽  
Microscopic Deformation ◽  
Resolution Requirements ◽  
Scanning Electron

The electron moiré method uses a high frequency grating to measure microscopic deformation. Finer and finer gratings are being pursued to meet higher and higher resolution requirements in microscopic stress analysis. In this study, the techniques of fabricating electron grid by means of a scanning electron microscope are improved. The use of a low accelerating voltage shows a better effect than the high accelerating voltage in fabricating a superfine grid. A new group of parameters is suggested based on this consideration. A cross-line grid with a frequency of 10,000 lines/mm and a parallel grating with a frequency of 13,000 lines /mm have been successfully fabricated.

Scanning Electron Microscope Assessment of Several Resharpening Techniques on the Cutting Edges of Gracey Curettes

2007 ◽  
Vol 8 (7) ◽  
pp. 70-77 ◽  
Author(s):  
José Eduardo Cezar Sampaio ◽  
Roberto Antonio Andrade Acevedo ◽  
Jamil A. Shibli
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
High Frequency ◽  
Periodontal Diseases ◽  
Lateral Face ◽  
Root Anatomy ◽  
Scaling And Root Planing ◽  
Sharp Edges ◽  
Scanning Electron

Abstract Aim Treatment of periodontal diseases is based on efficient scaling and root planing (SRP) and adequate maintenance of the patient. The effectiveness of SRP is influenced by operator skill, access to the subgingival area, root anatomy, and the quality and type of instrument used for SRP. The aim of this study was to evaluate the cutting edges of Gracey curettes after manufacturing and after resharpening using several techniques. Methods and Material The cutting edges of a total of 41 new #5-6 stainless steel Gracey curettes were evaluated blindly using scanning electron microscopy (SEM). The quality of the cutting edges was evaluated blindly by a calibrated examiner using micrographs. Data were analyzed using a Kruskal Wallis test and nonparametric two-way multiple comparisons. Results and Conclusions Different sharpening techniques had significantly different effects on the sharpeness of cutting edges (p<0.05). Sharpening by passing the lateral face of curettes over a sharpening stone and then a #299 Arkansas stone produced a high frequency of smooth, sharp edges or slightly irregular edges between the lateral and coronal faces of the curettes. Sharpening by passing a blunt stone over the curette's lateral face produced the poorest quality cutting edge (a bevel). Sharpening of the coronal curette face produced extremely irregular cutting edges and non-functional wire edges. Sharpening with rotary devices produced extremely irregular cutting edges. Citation Andrade Acevedo RA, Sampaio JEC, Shibli JA. Scanning Electron Microscope Assessment of Several Resharpening Techniques on the Cutting Edges of Gracey Curettes. J Contemp Dent Pract 2007 November; (8)7:070-077.

scholarly journals Shoot induction and plant regeneration from cotyledon segments of the muskmelon variety "hógolyó"

1999 ◽  
Vol 5 (1-2) ◽  
Author(s):  
Cs. Bársony ◽  
Gy. Bisztray ◽  
E. Bába ◽  
E. Velich
Keyword(s):  
Electron Microscope ◽  
Plant Regeneration ◽  
Scanning Electron Microscope ◽  
High Frequency ◽  
Shoot Formation ◽  
Root Induction ◽  
Shoot Induction ◽  
Free Media ◽  
Scanning Electron

Cotyledonary segments of the casaba type muskmelon variety "Hógolyó" were used to induce organogenesis. Fifty different hormone combinations were applied to enhance the induction of shoot formation on the edge of the segments. The phases of organogenesis were followed with light- and scanning electron microscope. Shoot induction was achieved with high frequency. The shoots were transferred to hormone free media for root induction. The rooted plantlets were planted out to soil. NAA was feasible and the method can be applied in transformation experiments.  

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