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Thio relaxers use ATG, or ammonium thioglycolate, which is also used in permanent waving, but at a much higher pH and concentration than used in permanent waves. It is usually higher than a pH of 10. These relaxers are also thicker with a higher viscosity, or thickness, which makes for an easier relaxer application.
pH sensitive polymers can be synthesized using several common polymerization methods. Functional groups may need to be protected so that they do not react depending on the type of polymerization. The masking can be removed after polymerization so that they regain their pH-sensitive functionality.
This multi-page article lists pharmaceutical drugs alphabetically by name. Many drugs have more than one name and, therefore, the same drug may be listed more than once. Brand names and generic names are differentiated by capitalizing brand names. See also the list of the top 100 bestselling branded drugs, ranked by sales.
Despite the claims of the relaxer being safe and natural, the product contained copper, ammonium, and chloride salts and a pH of less than the listed level of 3. [3] Due to these factors, people using the product suffered from hair loss, scalp burns, and (in some cases) green hair color. [4]
Sodium hydroxide is used in some relaxers to straighten hair. However, because of the high incidence and intensity of chemical burns, manufacturers of chemical relaxers use other alkaline chemicals in preparations available to consumers. Sodium hydroxide relaxers are still available, but they are used mostly by professionals.
Studies of proteins adapted to low pH have revealed a few general mechanisms by which proteins can achieve acid stability. In most acid stable proteins (such as pepsin and the soxF protein from Sulfolobus acidocaldarius ), there is an overabundance of acidic residues which minimizes low pH destabilization induced by a buildup of positive charge.
Hair relaxers have seen a considerable resurgence in popularity among the Black hair community. Here is why some women are deciding to go back to relaxers after years of dealing with their natural ...
The use of acidosis for a low pH creates an ambiguity in its meaning. The difference is important where a patient has factors causing both acidosis and alkalosis, wherein the relative severity of both determines whether the result is a high, low, or normal pH. [citation needed] Alkalemia occurs at a pH over 7.45.
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