Men who play guitar are sort of a perfectionist. They are very particular about things in their life in general. The right chord, the right pitch, the right music, the right rhythm etc. They may not know something about everything, but they will definitely know everything about something.
The starch test. Many different food groups contain a carbohydrate known as starch. Using an iodine solution, you can test for the presence of starch. When starch is present, the iodine changes from brown to blue-black or purple. change of color to a blue-black or purple color suggests that starch is present. If there is no change in color, this suggests no starch is detectable. Note the change of the iodine to black on the potato (right) but not the apple (left). (10% Tincture of iodine.) Potato contains starch, but apple does not.
A positive result therefore means non-reducing sugars are present on the original sample. Starch is easily detected in substances by its ability to change the colour of the iodine in potassium iodide solution from yellow to blue-black.Lipids do not dissolve in water, but do dissolve in ethanol. positive result therefore means non-reducing sugars are present on the original sample. Starch is easily detected in substances by its ability to change the colour of the iodine in potassium iodide solution from yellow to blue-black.