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This is a misspelling of Liebermann-Burchard test and is probably the result of Optical Character Recognition confusing a 'c' for an 'e'.
it is a test for presence of cholestrol and if two layers form, upper layer becomes red and lower one becomes yellow, it indicates the presence of cholestrol.
Testosterone has an -OH group, which gives a positive result with the Lieberman-Burchard test. (A greenish blue color is seen.)
it is a test for the presence of sterol. emerald green color indicates positivity to the test
It is a test for unsaturated steroids (as cholesterol) and triteness based on the formation of a series of colors (as pink to blue to green) with acetic an-hydride in the presence of concentrated sulfuric acid called also Liebermann-Burchard test
A Salkowski's test is a test for cholesterol. When concentrated sulfuric acid is added to a chloroform solution of cholesterol, the chloroform layer shows a red to blue colour and the acid layer shows a green fluorescence. This test is named after a German chemist by the name of Ernest Leopold Salkowski.
how would the determination of chlesterol in eggs be carried out using the libermanns burchard test
When conc. sulfuric acid is added to cholesterol, a water molecule is removed from C3 of cholesterol molecule, and it is oxidised to form3,5-cholestadiene.This product is converted to a polymer containing a chromophore which results in the green colouration indicating a positive test.
A red color is the positive result>
yes,it give positive test
A pregnancy test can show a positive result if you have miscarried. There is still enough hormone in your body to produce a positive result.
Any amount of Vyvanse could result in a positive amphetamine test.