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Stefan Šiljković

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last 3 solved tasks
How much is 4x5?

Edward A. Doisy

Born 13 Nov 1893; died 23 Oct 1986 at age 92.Edward Adelbert Doisy was an American biochemist who shared (with Henrik Dam) the 1943 Nobel Prize for Physiology or Medicine for his isolation and synthesis of vitamin K, a substance that encourages blood clotting (1939), used in medicine and surgery. With the embryologist Edgar Allen (1922-34), he developed assay techniques that facilitated research on sex hormones. Doisy and his associates isolated the sex hormones estrone (theelin, 1929; the first estrogen to be crystallized), estriol (theelol, 1930), and estradiol (dihydrotheelin, 1935). In 1936-39 he isolated two forms of the vitamin, (K1 from lucerne seed and K2 from fish meal, in a pure crystalline form), determined their chemical structures, and synthesized the vitamin.«

Cross-eyed dog

A man took his Rottweiler to the vet and said "My dog's cross-eyed, is there anything you can do for him?"

"Well," said the vet, "lets have a look at him." So he picks the dog up and has a good look at its eyes.

"Hmm," says the vet, "I'm going to have to put him down"

"Just because he's cross-eyed?" says the man.

"No, because he's heavy," says the vet.

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