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The Canadian formulation of Preparation H includes a yeast extract called Biodyne which was removed in 1995 from the formulation sold in the United States. This yeast extract was the primary ingredient of the original formulation by inventor George Sperti , [ 5 ] [ 6 ] and Pfizer believes that it removes wrinkles from skin and heals dry ...
Hydrolyzed protein is a solution derived from the hydrolysis of a protein into its component amino acids and peptides. While many means of achieving this process exist, the most common method is prolonged heating with hydrochloric acid, [1] sometimes with an enzyme such as pancreatic protease to simulate the naturally occurring hydrolytic process.
George Speri Sperti (January 17, 1900, Covington, Kentucky – April 29, 1991, Cincinnati, Ohio) was an Italian-American who invented Preparation H hemorrhoid medication. He also invented the Sperti Ultraviolet Lamp, Aspercreme for pain relief, and KVa Power Meter. [1] [2] Sperti graduated from the University of Cincinnati in 1923. Shortly ...
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Between the two World Wars, the preparation was often called "Carrel–Dakin solution," even though Dakin did the bulk of the research work that led to its formulation. The name of Carrel was dropped after World War II, presumably due to his active involvement in eugenics movements and the advocacy of elimination of "inferior" humans. [1]
Burow's solution is an aqueous solution of aluminium triacetate.It is available in the U.S.A. as an over-the-counter drug for topical administration, with under the brand name Domeboro (Moberg Pharma) [1] The preparation has astringent and antibacterial properties and may be used to treat a number of skin conditions, including insect bites and stings, rashes caused by poison ivy and poison ...
Lufenuron is a veterinary preparation (known as Program) that attacks the larval flea's ability to produce chitin, necessary for the adult's hard exoskeleton, but it does not kill fleas. Flea medicines need to be used with care because many of them also affect mammals. Pyrethrin based flea treatments meant for dogs can be hazardous to cats.
Diff-Quik may be utilized on material which is air-dried prior to alcohol fixation rather than immersed immediately (i.e. "wet-fixed"), although immediate alcohol fixation results in improved microscopic detail.