< b > RESPONSE < / b > < br > < br > Vulcan blood is presumed to be green in color , the explanation for this ( first definitely advanced in the installment  Obsession ,  from the original program ) being that the oxiferous ( oxygen-carrying ) protein < i > < b > hemoglobin , < / b > < / i > in Vulcan blood cells , is chemically based on the ...
View my complete profile. A secondary standard is a substance which may be used for standardizations, and whose content of the active substance has been found by comparison against a primary standard.iew my complete profile. A secondary standard is a substance which may be used for standardizations, and whose content of the active substance has been found by comparison against a primary standard.
A primary standard in metrology is a standard that is sufficiently accurate such that it is not calibrated by or subordinate to other standards. Primary standards are defined via other quantities like length, mass and time. Primary standards are used to calibrate other standards referred to as working standards. See Hierarchy of Standards.