Evaluation of the F2000 bonding procedure: a high resolution SEM study

2001 ◽  
Vol 29 (7) ◽  
pp. 499-507 ◽  
Author(s):  
Lorenzo Breschi ◽  
Pietro Gobbi ◽  
Mirella Falconi ◽  
Luigi Ciavarelli ◽  
Gabriella Teti ◽  
...  
Keyword(s):  
High Resolution ◽  
Sem Study

High-Resolution Scanning Electron Microscopy of Biological Specimens

1988 ◽  
Vol 46 ◽  
pp. 186-187
Author(s):  
M. Müller ◽  
R. Hermann
Keyword(s):  
High Resolution ◽  
Freeze Drying ◽  
Room Temperature ◽  
Structural Information ◽  
Freeze Substitution ◽  
Critical Point Drying ◽  
Sem Study ◽  
Major Factors ◽  
Structural Preservation ◽  
Preparation Techniques

Three major factors must be concomitantly assessed in order to extract relevant structural information from the surface of biological material at high resolution (2-3nm).Procedures based on chemical fixation and dehydration in graded solvent series seem inappropriate when aiming for TEM-like resolution. Cells inevitably shrink up to 30-70% of their initial volume during gehydration; important surface components e.g. glycoproteins may be lost. These problems may be circumvented by preparation techniques based on cryofixation. Freezedrying and freeze-substitution followed by critical point drying yields improved structural preservation in TEM. An appropriate preservation of dimensional integrity may be achieved by freeze-drying at - 85° C. The sample shrinks and may partially collapse as it is warmed to room temperature for subsequent SEM study. Observations at low temperatures are therefore a necessary prerequisite for high fidelity SEM. Compromises however have been unavoidable up until now. Aldehyde prefixation is frequently needed prior to freeze drying, rendering the sample resistant to treatment with distilled water.

Cosmetology treatments on human hair: An SEM study

1996 ◽  
Vol 54 ◽  
pp. 940-941
Author(s):  
D.F. Bowling
Keyword(s):  
High School ◽  
High Resolution ◽  
Human Hair ◽  
Optical Microscope ◽  
Convincing Evidence ◽  
Brightness Contrast ◽  
Sem Study

High school cosmetology students study the methods and effects of various human hair treatments, including permanents, straightening, conditioning, coloring and cutting. Although they are provided with textbook examples of overtreatment and numerous hair disorders and diseases, a view of an individual hair at the high resolution offered by an SEM provides convincing evidence of the hair‘s altered structure. Magnifications up to 2000X provide dramatic differences in perspective. A good quality classroom optical microscope can be very informative at lower resolutions.Students in a cosmetology class are initially split into two groups. One group is taught basic controls on the SEM (focus, magnification, brightness, contrast, specimen X, Y, and Z axis movements). A healthy, untreated piece of hair is initially examined on the SEM The second group cements a piece of their own hair on a stub. The samples are dryed quickly using heat or vacuum while the groups trade places and activities.

Plasma Membrane Stability during Rehydration of Dried Typha latifolia Pollen: a High Resolution Cryo-SEM Study

2003 ◽  
Vol 9 (S03) ◽  
pp. 502-503 ◽  
Author(s):  
Jaap Nijsse ◽  
Paul Walther ◽  
Elena Golovina ◽  
Folkert A. Hoekstra
Keyword(s):  
Plasma Membrane ◽  
High Resolution ◽  
Typha Latifolia ◽  
Membrane Stability ◽  
Sem Study

Comparative Study of Thick Film Dielectrics

1982 ◽  
Vol 1 (1) ◽  
pp. 11-16 ◽  
Author(s):  
W. Vermeirsch
Keyword(s):  
High Resolution ◽  
Comparative Study ◽  
Thick Film ◽  
Fine Line ◽  
Test Programme ◽  
Bulk Porosity ◽  
Sem Study ◽  
Chip Carrier ◽  
Selection Of

Increasing density requirements urge the thick film hybrid manufacturers to print high resolution patterns and to consider the application of multilayer hybrids. The introduction of compact interconnection technologies such as TAB and chip carrier will no doubt accelerate this process. Paste manufacturers are carrying out research to develop inks suited for fine line printing. The properties of dielectric pastes, necessary for multilayer applications, have not been studied so extensively. A programme was initiated to compare various dielectrics in combination with various conductors. From the test programme two tests were found to be most significant for the dielectric's characterisation. These tests, in combination with an SEM‐study of surface and bulk porosity, permitted a quick and reliable selection of an appropriate dielectric paste to be made.

High resolution SE-I SEM study of enamel crystal morphology

1990 ◽  
Vol 14 (1) ◽  
pp. 70-78 ◽  
Author(s):  
Robert P. Apkarian ◽  
Marc D. Gutekunst ◽  
David C. Joy
Keyword(s):  
High Resolution ◽  
Crystal Morphology ◽  
Sem Study ◽  
Enamel Crystal

A High Resolution SEM Study of Human Minor Salivary Glands

2000 ◽  
Vol 38 (4) ◽  
pp. 219-226 ◽  
Author(s):  
A. Riva ◽  
R. Puxeddu ◽  
L. Uras ◽  
F. Loy ◽  
S. Serreli ◽  
...  
Keyword(s):  
High Resolution ◽  
Salivary Glands ◽  
Minor Salivary Glands ◽  
Sem Study

scholarly journals A High Resolution SEM Study of the Effects Supplementation Different Ratio Of n-6:n-3 on the Endometrial Pregnant Rat

2016 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Amira Kassem ◽  
Md Zuki Abu Bakar ◽  
Goh Yong Meng ◽  
Noordin Mohamed Mustapha
Keyword(s):  
Fatty Acids ◽  
High Resolution ◽  
Control Diet ◽  
Dietary Fatty Acids ◽  
Cod Liver Oil ◽  
Pregnant Rat ◽  
Sem Study ◽  
Ad Libitum ◽  
And Control ◽  
Scanning Electron

This study, therefore, aims to investigate the effects of dietary fatty acids onendometrial pinopode expression. Twenty eight  rats were randomly divided into four groups  (seven  rat per treatment).Treatment diets were rat chow only control diet ( con ), rat chow containing  0.9 ml soybean oil (SO) + 0.9 ml cod liver oil (CLO)  the ratio 1:1, rat chow added with 1.5 ml SO  + 0 .3 ml CLO  the ratio 6:1 and rat chow added with  1.74 ml  SO + 0.06 ml CLO   the ratio 30:1 ,feeds of 15g/ day were given and water was available ad libitum .. The endometrial samples were evaluated under SEM. developing pinopodes were seen during increasing progesterone concentrations especially in Diet 1:1 group, and regressing pinopodes were found with decreasing progesterone in Diet 30:1  groups. In both Diet 1:1 treated and control animals, on days 15 of pregnancy, scanning electron micros copy revealed the microvilli of the uterine epithelial cells in the treated animals were more dense than those in the Diet 30:1 treated animals.

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