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Joe Smith

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Remove 7 letters from this sequence (DIESTRUCSKTALIONOO) to reveal a familiar English word.
MATH PUZZLE: Can you replace the question mark with a number?
I am both a killer and a savior, it depends on those who wield me. I will bring you from deep water to the shallows, or maybe I could be the one who will hang you in the gallows. What am I?

Pituitary hormone

In 1937, the successful isolation of the first of the protein pituitary hormones was published in Science journal. Bovine prolactin (bPRL), the lactogenic hormone, was obtained in pure crystalline form by three doctors at the Yale University School of Medicine. This meticulous, time-consuming work by A. White, H.R. Catchpole and C.N.H. Long was done long before the availability of modern chromatographic methods of analysis and purification. The peanut-sized pituitary gland at the base of the brain is the master endocrine gland in vertebrate animals. Different pituitary hormones control the functioning of most of the body's endocrine glands, stimulate growth and control the water balance of the body. Prolactin was first named for its ability to promote milk production in response to the suckling stimulus of hungry young mammals.«[Ref: White, A., Catchpole, H.R. and Long, C.N.H., 'A crystalline protein with high lactogenic activity', Science (23 Jul 1937), 86, 82-83.]

A man went into a restaurant a...

A man went into a restaurant and asked for crab. When the waiter brought it, the man objected, "Just a minute, that crab only has one claw!"
"Yes, said the waiter, it was in a fight."
"Well," said the man, "Bring me the winner!"
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