Derivative (finance) In finance, a derivative is a contract that derives its value from the performance of an underlying entity. This underlying entity can be an asset, index, or interest rate, and is often simply called the underlying.
Examples. Preservatives are either natural or chemical. Examples of chemical preservatives include nitrates, sulfites, sodium benzoate, potassium sorbate, and propyl gallate. Common natural preservatives include salt, lemon juice (citric acid), vinegar (acetic acid), sugar, and certain spices.unction. Preservatives work in one of three ways. They can prevent growth of microorganisms by creating an environment hostile to them. They can block the process of oxidation that causes foods to turn rancid.
Edit 0 12 â¦. Preservatives can be anti-microbial, to inhibit the growth of bacteria, or antioxidants, to inhibit the oxidation of food constituents. Common anti-microbials: calcium propionate, sodium nitrate, sodium nitrite, sulfites (sulfur dioxide, sodium bisulfite, potassium hydrogen sulfite, etc.) and disodium EDTA.odium benzoate and benzoic acid are two very common antimicrobial compounds used in the preservation of food; sodium benzoate actually produces benzoic acid when dissolved in water. Benzoic acid has the antimicrobial properties and is found naturally in some fruits.