In Russian standards, obligatory tests of the base metal include Tkb and NDT tests and there are more stringent requirements for the Charpy V-notch impact test and CTOD test.
Enzyme analysis may occasionally help to detect heterozygotes but is often inconclusive due to random X-chromosomal inactivation; hence, molecular testing of females is obligatory [ 3].
In the Netherlands, reporting of suspected cases of SBV infection in animals (occurrence of arthrogryposis hydranencephaly syndrome in calves, lambs, and goat kids) is obligatory; a report is followed by confirmatory testing of brain tissue samples by RT-PCR.
That is due to the fact that these processes are based on two factors: The monetary cost of conducting the appropriate and necessary testing of all devices, and the magnitude of obligatory time required in the testing process.
In addition to the obligatory clinical tests, imaging of the lacrimal drainage system (LDS) is useful in its clinical evaluation.
Obligatory psychological testing for gun owners is a common subject of discussion, but it has always been rejected.
However, there is no other comparable standard available besides the above mentioned ASTM method, which is obligatory for the ASTM test of skin antiseptics [ 19] and which includes the validation of neutralization.
Klapp Lekholm and Cliffordson (2008) investigated how parental education at the school level and student level related to the grades from the end of school-year 9 (i.e., at the end of compulsory education) in Swedish, English, and mathematics, and achievement on a set of obligatory national tests in the same core subjects administered to ninth-grade students in Sweden.
The bottles are full of a cloudy yellow liquid and are no doubt urine samples, handed over in advance ahead of the obligatory drugs test.
The result is remarkably good and has, with the obligatory tonic added, withstood the acid test of approval by some of the confirmed gin drinkers in my village.
