When observing the results of a Von Kossa stain microscopically, it is noted that the calcium salts are staining a yellow to yellow brown color instead of the expected black. What is a plausible explanation for these results?

This is a photomicrograph of a Gram stain taken from a 36 year old woman who sought medical care for difficulty breathing. She later died from empyema (pus in a body cavity). The reagent responsible for staining the bacteria shown here is:  91.jpg 

Both myelin sheath and nissl substances can be demonstrated by:

Which of the following fixatives do not contain an aldehyde?

Identify the corrective action that would be taken here. 5.jpg 

PAS with diastase will demonstrate:

Long periods of dehydration in ethanol during processing should be avoided because:

The preferred fixative for this stain is:  19.jpg 

An example of a stain that will demonstrate elastic is:

The tissue shown here was stained with the GMS stain.  What is the most likely explanation for the finding shown here?  53.jpg