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In organic chemistry, Fehling's solution is a chemical reagent used to differentiate between water-soluble carbohydrate and ketone (>C=O) functional groups, and as a test for reducing sugars and non-reducing sugars, supplementary to the Tollens' reagent test. The test was developed by German chemist Hermann von Fehling in 1849. [1]
Fehling's solution was used for many years as a diagnostic test for diabetes, a disease in which blood glucose levels are dangerously elevated by a failure to produce enough insulin (type 1 diabetes) or by an inability to respond to insulin (type 2 diabetes). Measuring the amount of oxidizing agent (in this case, Fehling's solution) reduced by ...
It is often used in place of Fehling's solution to detect the presence of reducing sugars and other reducing substances. [2] Tests that use this reagent are called Benedict's tests. A positive result of Benedict's test is indicated by a color change from clear blue to brick-red with a precipitate.
Due to mutarotation, glucose is always present to a small extent as an open-chain aldehyde. By adding the Fehling reagents (Fehling (I) solution and Fehling (II) solution), the aldehyde group is oxidized to a carboxylic acid, while the Cu 2+ tartrate complex is reduced to Cu + and forms a brick red precipitate (Cu 2 O).
The most common causes of CKD are high blood pressure and diabetes, "which damage the small blood vessels and filtering units in the kidneys over time," says Nagata. Other potential causes he ...
"Diabetes may reduce blood flow to the feet, making it even more difficult to heal an injury or resist infection," says Miguel Cunha, D.P.M., board-certified foot surgeon and founder of Gotham ...
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