Astringent agent

Silver bromide is used in photographic film and plates. It also is used in photochromic glass. In medicine it is used as a topical anti-infective and astringent agent. 

Pastes Ointment-like mixtures of starch, dextrin, zinc oxide, sulfur, calcium carbonate, or other medicinal substances made into a smooth paste with glycerin, soft soap, petrolatum, lard, or other fats, and medicated with antiseptic or astringent agents, designed for external use. Early pastes, such as Pasta Glycyrrhizae and Pasta Althaeae, were internal preparations, most of which were of gum-like consistency. The modern pastes were introduced by the noted... 

Silver nitrate is used as a caustic, antiseptic, and astringent agent. The silver ion is precipitated by the chloride in tissue fluids, so that it does not readily penetrate. 

Alum Astringent crystalline double sulfate of an alkali. K2SO4AL2 (S04)j 24H2O. Used in the processing of pickles and as a flocking agent. Excess aluminum in the environment can be hazardous. 

Asthma. A condition marked by recurrent attacks of paroxysmal dyspnea, with wheezing resulting from spasmodic contraction of the bronchi. Some cases of asthma are allergic manifestations in sensitized persons. Astringent. An agent that causes tissue to contract. 

Astringents act by precipitating proteins in superficial layers of cells and are used to diminish the excretion or exudation of superficial cells. They are also used as local haemostatics and mummifying agents (discussed elsewhere). The different types of astringents used in dentistry are ... 

In dentistry, when astringents and antiseptics are used to harden and dry tissues of the pulp and root canal so that the tissues are resistant to infection, they are termed as mummifying agents. It is used in certain dental procedures when it is not possible to completely remove the pulp and contents of root canal. For this, generally a combination of various mummifying agents are used in the form of paste or semi-liquid preparation like tannic acid glycerine. 

N.A. Silicic acid, silicates, flavonoids, phenolic acid, nicotine, sterols.100 Regeneration of connective tissue, clotting agent, astringent effect on genitourinary system. 

Ellagic acid is an astringent, hemostatic, antioxidant, antimutagenic, and possibly an antineoplastic agent from strawberries, raspberries, grapes, walnuts, and pecans. Its human dietary role in cancer prevention is uncertain and in planta function is unknown. 

Red clover acts as a dermatological agent and possesses mildly antispasmodic and expectorant properties. Tannins are known to have astringent properties. Traditionally, red clover has been used for chronic skin disease, whooping cough, and specifically for eczema and psoriasis. 

Uses Creosote is a flammable, oily liquid with a characteristic smoky smell, caustic burning taste, but colorless in pure form. It is primarily used as a wood preservative and as a waterproofing agent, animal dip, an ingredient in fuel oil, and in the manufacture of chemicals and lampblack. It is extensively used in the pharmaceutical industry as an antiseptic, disinfectant, antipyretic, astringent, styptic, germicide, and expectorant. 

By careful processing, the winemaker brings the wine to a finished state. The white and rose wines will have maintained their bouquet and aroma and flavors. The red table wines will have been softened by careful fining with such agents as gelatin and PVPP, will be fruity, and will have distinctive varietal aromas and flavors with minimal astringency. 

Anti-acids, astringents and antiseptic agents may contain a variety of aluminium salts. Organic salts, alumina, the hydroxide and phosphates may be attacked with concentrated hydrochloric acid and diluted to bring the aluminium concentration into the range 10—50 pg ml"1. Alternative procedures for antacids using hydrochloric/nitric acid [67] and extraction with 4M hydrochloric acid [95] have been proposed. For silicates, the sample is best taken up in perchloric/hydrofluoric acid, evaporated to dryness to remove silica, and then the residue dissolved in warm hydrochloric acid [87], In each case the nitrous oxide/acetylene flame is the preferred atom cell, and the method of standard additions may be used to minimise any errors arising from lateral diffusion. 

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