FACTOID # 106: Americans are 15% more innovative than the Japanese. But in percentage terms, the Japanese grant 3.5 times more patents.
 
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Encyclopedia > Specimen

In biology, specimen is an individual animal or a plant or a microorganism that is used as a representative to study the properties of the whole population of that species.


  Results from FactBites:
 
Nikon MicroscopyU: Specimen Contrast in Optical Microscopy (5471 words)
Specimen shading introduced by the compensator results in one side of the image appearing dark while the other side is brighter, leading to the perception of a pseudo three-dimensional image.
When considering transparent phase specimens that are poorly imaged in brightfield illumination, the role of the specimen in altering the optical path length (in effect, the relative phase shift) of waves passing through is of paramount importance.
A majority of phase specimens that are observed in culture vessels or sandwiched between a microscope slide and coverslip are relatively flat or plate-like as illustrated in Figure 4 for a hypothetical specimen immersed in a homogeneous medium.
STEM Specimen Preparation, BNL Biology (1404 words)
The ideal specimen for the STEM is one that can be applied to the grid in water or 20 mM ammonium acetate which volatilizes during freeze-drying.
For a new specimen in an unusual buffer, a grid of TMV by itself washed with the buffer is made as a control.
Some specimens, such as membrane proteins, have to be solubilized in a detergent and these are always difficult to work with although some successful results have been obtained.
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