Canine TSH may be measured at 30 minutes as part of a TRH stimulation test in the diagnosis of secondary hypothyroidism. Normal dogs should increase cTSH by at least 0.4 ng/mL. Total T3 (TT3) â The analysis of TT3 is of little value in the diagnosis of hypothyroidism principally because of the high prevalence of cross-reacting T3 autoantibodies (T3AA) in hypothyroid dogs.
The forward (leading) edge of the sail is called the luff, which, in a mainsail, is parallel to the mast. The aft (back) edge of a sail is called the leech (also spelled leach), which is opposite the luff, and forms the hypotenuse of the triangle.
The more stuff you get outside of that line, the more tendency there is for the sail to twist and open up. Square-top sails have so much area out there, the challenge is minimizing twist so that you have an appropriate profile up the sail. As you go higher off the water, the wind velocity is higher, so you want a certain amount of twist in a leech. On the triangular-sail boats, we're working hard to introduce that twist.