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Spray-on hair generally works in one of two ways. Either it directly colors the scalp and enhances whatever hair is in the area by thickening it, or it generates hair-like filaments that cling to the scalp and existing hair. [1] Spray-on hair was one of the products pioneered by Ronco in the 1980s, under the name "GLH-9" (Great Looking Hair ...
Hair spray (also hair lacquer or spritz) is a common cosmetic hairstyling product that is sprayed onto hair to protect against humidity and wind and have it stay in a desired shape. Hair sprays typically consist of several components for the hair as well as a propellant.
In 1948, Chase Products became the first company to package hair spray. Hair spray became very popular in the 1950s due to its ability to keep hair in place and prevent hair from falling out of a styled look. [4] Famous Hair Products. Bear's grease made from bear fat and marrow had been in use as early as the 11th century as a baldness remedy.
An electron donating group (EDG) or electron releasing group (ERG, Z in structural formulas) is an atom or functional group that donates some of its electron density into a conjugated π system via resonance (mesomerism) or inductive effects (or induction)—called +M or +I effects, respectively—thus making the π system more nucleophilic.
A 19th-century advertisement for hair care products. Hair conditioner is a hair care cosmetic product used to improve the feel, texture, appearance and manageability of hair. Its main purpose is to reduce friction between strands of hair to allow smoother brushing or combing, which might otherwise cause damage to the scalp. [1]
Delocalizing the radical ion stabilizes the transition state structure. As a result, the energy of activation decreases, enhancing the rate of the overall reaction. According to the captodative effect, the rate of a reaction is the greatest when both the EDG and EWG are able to delocalize the radical ion in the transition state structure. [7]
Diethylene glycol (DEG) is an organic compound with the formula (HOCH 2 CH 2) 2 O. It is a colorless, practically odorless, and hygroscopic liquid with a sweetish taste. It is a four carbon dimer of ethylene glycol.
An electron-withdrawing group (EWG) is a group or atom that has the ability to draw electron density toward itself and away from other adjacent atoms. [1] This electron density transfer is often achieved by resonance or inductive effects.
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