scholarly journals Stability of Novel Plasma Markers Associated with Cardiovascular Disease: Processing within 36 Hours of Specimen Collection

2002 ◽  
Vol 48 (10) ◽  
pp. 1781-1784 ◽  
Author(s):  
Jennifer K Pai ◽  
Gary C Curhan ◽  
Carolyn C Cannuscio ◽  
Nader Rifai ◽  
Paul M Ridker ◽  
...  
Keyword(s):  
Cardiovascular Disease ◽  
Specimen Collection ◽  
Plasma Markers

scholarly journals Effects of a carbohydrate-restricted diet on emerging plasma markers for cardiovascular disease

2006 ◽  
Vol 3 (1) ◽  
Author(s):  
Richard J Wood ◽  
Jeff S Volek ◽  
Steven R Davis ◽  
Carly Dell'Ova ◽  
Maria Luz Fernandez
Keyword(s):  
Cardiovascular Disease ◽  
Restricted Diet ◽  
Plasma Markers

Specimen Collection Effect in Scanning Electron Microscopy Images

1972 ◽  
Vol 30 ◽  
pp. 448-449
Author(s):  
J. Temple Black ◽  
Jose Guerrero
Keyword(s):  
Surface Morphology ◽  
Secondary Electron Emission ◽  
Secondary Electrons ◽  
Charge Effects ◽  
Material Density ◽  
Specimen Collection ◽  
The Subject ◽  
Curved Paths ◽  
Subject Material ◽  
Microscopy Images

In the SEM, contrast in the image is the result of variations in the volume secondary electron emission and backscatter emission which reaches the detector and serves to intensity modulate the signal for the CRT's. This emission is a function of the accelerating potential, material density, chemistry, crystallography, local charge effects, surface morphology and especially the angle of the incident electron beam with the particular surface site. Aside from the influence of object inclination, the surface morphology is the most important feature In producing contrast. “Specimen collection“ is the name given the shielding of the collector by adjacent parts of the specimen, producing much image contrast. This type of contrast can occur for both secondary and backscatter electrons even though the secondary electrons take curved paths to the detector-collector.Figure 1 demonstrates, in a unique and striking fashion, the specimen collection effect. The subject material here is Armco Iron, 99.85% purity, which was spark machined.

Sign in / Sign up

Export Citation Format

Share Document