00:01
So you're testing carbohydrates, protein, and lipids tested on food, and your results are collected in the table.
00:10
So based on the data, right, the hypothesis regarding the organic molecule content of different food.
00:17
So there are four different reagent.
00:19
I'm going to talk about what each reagent is used for.
00:25
So the first is benedict.
00:30
The benedict solution is used to test for the presence of shorthy.
00:34
Small sugar, such as glucose.
00:44
So a negative test, which means no small sugar glucose is present, will show a blue color.
00:51
But a positive test, which means the food contains glucose, will show a wide range of color, including green, yellow, orange, red, and brown.
01:08
So a wide variety of color.
01:10
And you must boil the solution to see the color change.
01:12
The second reagent is iodine.
01:17
Iodine is testing for the presence of a specific polysaccharide, which is starch.
01:25
Now, a negative test for starch will show a orange, yellowish color, but a positive starch test will show a black, bluish color.
01:39
The next reagent, sudan 3.
01:41
The sudan test for the presence of lipids.
01:49
The negative test means that there's no red layer shows up, and a positive lipid test shows a red layer showing up.
02:03
So sudan 3 also sometimes called sudan red.
02:07
The last one, bay uret, test for the presence of proteins.
02:20
A negative test will show a bluish color, a positive test of biorett will show a purple color.
02:29
Now, the bayura reagent does not require heating, which is different from the first one, benedict's.
02:36
The better solution, you have to boil the solution to show the color change.
02:41
Now, i have discussed the four reagent and then also the positive and negative reaction.
02:47
Let's take a look at our food.
02:49
First one, potato.
02:55
So potatoes show, let me write down here, benedict, a blue color, which means it's, negative.
03:08
The second reagent iodine show a blackish color.
03:16
So this is a positive reaction.
03:19
So then show a no red layer negative.
03:27
And the last one by your red, blue negative...