The largest diamond ever found in the U.S., a white gem named the Uncle Sam, was found here in 1924. It was 40.23 carats, which is basically the size of a gumball. And in the 1950s, a woman found a 15.33-carat diamond.
Alkaloids that possess an isoquinoline skeleton are among the most common of all alkaloids. These are derived from a 3,4-dihydroxytyramine (dopamine) precursor that undergoes a Schiff base addition with aldehydes of different origin.At least 4000 compounds of this structural type are known.hese alkaloids are mostly found in the Cactaceae, but in some other families as well. About 130 isoquinoline alkaloids are known. They are derived from a 3,4-dihydroxytyramine (dopamine) precursor and have an isoquinoline skeleton.
In Euclidean geometry, an isosceles trapezoid (isosceles trapezium in British English) is a convex quadrilateral with a line of symmetry bisecting one pair of opposite sides. It is a special case of a trapezoid.In any isosceles trapezoid two opposite sides (the bases) are parallel, and the two other sides (the legs) are of equal length (properties shared with the parallelogram). The diagonals are also of equal length.n Euclidean geometry, an isosceles trapezoid (isosceles trapezium in British English) is a convex quadrilateral with a line of symmetry bisecting one pair of opposite sides. It is a special case of a trapezoid.