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Amino acids, specifically the primary amine group found in proteins, react with ninhydrin to produce a purple-blue color. This reaction is commonly used to detect and visualize amino acids in biological samples such as human skin.

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What substances are found on the human skin that react with ninhydrin resulting to stain or violet coloration on the skin?

Ninhydrin (2,2-dihydroxyindane-1,3-dione) is a substance intended to discover the existence of Ammonia or anything that contains Amines. When this substance reacts with these Amines a blue-purple stain will be observed. Since, the skin contains amino acid, a blue-purple stain will be noticed.


What is the chemical substance found in a firefly?

Luciferin, a protein that reacts with oxygen to produce light.


Why ninhydrin test is positive for all proteins?

The ninhydrin test is positive for all proteins because it reacts with free amino groups found in the amino acids that make up proteins. When ninhydrin is applied, it forms a colored complex, typically purple or blue, indicating the presence of amino acids. Since all proteins consist of amino acids linked by peptide bonds, the test detects these amino groups, leading to a positive result for any protein. This makes the ninhydrin test a general method for assessing the presence of proteins in a sample.


Which chemical is used by police to find bribe?

One chemical that can be used by police to detect traces of bribe money is called 2,4-Dinitrophenylhydrazine (2,4-DNPH). This chemical reacts with the substances often found in banknotes and produces a color change, making it easier to identify tainted money.


What is The reaction of aluminum metal with oxygen gas typically produces the product with the formula of what?

The reaction of aluminum metal with oxygen gas typically produces aluminum oxide, which has the formula Al₂O₃. This compound forms when aluminum reacts with oxygen in a highly exothermic reaction, resulting in a white, powdery substance that is commonly found in nature as a component of various minerals.


What is one substance that is found in higher concentrations in the venule than in the arteriole?

Carbon dioxide is one substance that is found in higher concentrations in the venule than in the arteriole. This is because carbon dioxide is produced by cells during metabolism and diffuses from the tissues into the blood, resulting in higher concentrations in the venous circulation.


What substance is found at the side of the test tube containing the mixture of sulfur and iron filings after heating?

When sulfur and iron are heated together Fe and sulphur ions are formed. These ions make FeS together. FeS is black in color.


Which substance found in th cytoplasm of an ameba is an inorganic compound?

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What does sodium reacts with?

Sodium is so reactive it is usually found in compounds. It reacts most violently with water, creating sodium hydroxide.


What is the simplest substance found on earth?

the simplest substance is air


What is the substance found naturally in fruits such as apples and citrus?

The substance found in apples and citrus fruits are vitamin C.


What gas that is found in the air which is needed for the toast to burn?

Oxygen is the gas found in the air that is necessary for toast to burn. When toast is heated, it undergoes a combustion reaction where oxygen reacts with the toast to produce heat and light, resulting in the burning process.