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A positive result for Seliwanoff's test is indicated by the development of a deep cherry-red color, which signifies the presence of ketoses, such as fructose, in the tested solution. This reaction occurs when the carbohydrate is heated with Seliwanoff's reagent, which contains concentrated hydrochloric acid and resorcinol. In contrast, aldoses, like glucose, typically produce a light pink color or no significant color change. This test is used to differentiate between aldoses and ketoses in carbohydrates.
What else can I help you with?
What color is positive test result for glucose?
the color of a positive test results is bright green
Positive result for bial-orcinol test?
bluish color if pentose is present.
What is the positive result for sakaguchi test?
A positive result for the Sakaguchi test is the formation of a white or yellow precipitate in the presence of arginine or histidine in the test sample. This precipitate forms when ninhydrin (reagent used in the test) reacts with the guanidine group of arginine or the imidazole group of histidine.
What is a positive test result for starch?
A positive test result for starch is the formation of a blue-black color when iodine solution is added to the sample being tested. This color change indicates the presence of starch in the sample.
Is the DNA test result positive or negative?
The DNA test result is positive.
What is the positive result for murexide test or test for purines?
The positive result for the murexide test, which is used to detect purines like uric acid and guanine, is the formation of a purple color when the sample is treated with ammonia and concentrated nitric acid. This color change indicates the presence of purines in the sample.
In the lugols solution test what color is a positive test?
A positive Lugol's solution test will result in a dark blue or black coloration, indicating the presence of starch.
Why phenylalanine give negative result with xanthoproteic test?
Phenylalanine gave a yellow to orange color in xanthoproteic test which means it is positive.
Is the crystal violet test result positive or negative?
The crystal violet test result is positive.
Have you received a positive hCG test strip result"?
"Did you get a positive hCG test strip result?"
which of the different carbohydrates test would give a positive result for maltose describe its color change?
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What is positive color for iodine test?
The positive color for the iodine test is a dark blue or black color. This color change indicates the presence of starch in the test substance.
