alginic acid


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Related to alginic acid: alginic acid sodium salt

alginic acid

 [al-jin´ik]
a hydrophilic colloidal carbohydrate obtained from seaweed, used as a tablet binder and emulsifying agent.

alginate

A gelatinous polysaccharide extract from brown algae and salt of alginic acid, which is a linear polymer of mannuronic and glucuronic acids, found in the cell walls of algae. It is widely used in processed foods and in medicinal, industrial and household products, including swabs, filters and fire retardants.

Source
Laminaria spp and Macrocystis pyrifera; a chemically different version of algin is produced by the bacterium Azobacter vinelandii.
 
Dentistry
Alginate can be formulated with gypsum into a plaster like compound to take impressions for crown and bridgework.
 
Surgery
Alginates are used as foam, clotting agents and gauze in absorbable surgical dressings and packing.
 
Wound care
Alginate dressings are derived from seaweed made of soft non-woven fibres, and are available as pads, ropes or ribbons. Alginate dressings are extremely lightweight, absorb many times their own weight, form a gel-like covering over the wound, and maintain a moist environment. They are best used for wounds with significant exudate.

Pros
Especially useful for packing exudative wounds; do not physically inhibit wound contraction as does gauze; highly absorbent.
 
Cons
Requires a secondary dressing; too drying if wound has little exudate.

alginic acid

An ANTACID drug used in the treatment of stomach ulcer and indigestion. When supplied in combination with other drugs brand names are Gastrocote, Gaviscon and Topal.
References in periodicals archive ?
Due the increasing demand of alginate in the country, the research was planned to explore the potential of Carica papaya waste for the production of alginic acid using Azotobacter vinelandii.
Alginic acids composing cell walls of seaweeds have been reported to have characteristics of forming viscous gel so that palatability preference is lowered, accompanied by a reduction in feed intakes (Beresford et al., 2000).
The active matter calcium salt of alginic acid in the cell walls of algae varies from 7 percent to the 25 percent of the dry mass.
Terwet(r)1004 and alginic acid failed to obtain more than 80% conidial germination; hence they were excluded as ingredients for WG formulation due to adverse effects on conidial viability (Table 4).
Briefly, 2.0 % alginate solutions were prepared by adding alginic acid sodium into NaCl, and HEPES in deionized water.
Alginic acid is a colloidal polysaccharide extracted from various species of cell walls of brown seaweed (Phaeophyceae).
(2.) Draget et al., "Alginic Acid Gels - The Effect of Alginate Chemical Compositionand Molecular Weight," CarboPol.
Demulcents, such as alginic acid, Ceratonia siliqua (carob), U/mar rubra (slippery elm), A/thaea officinalis (marshmallow), and Aloe vera (aloe) leaf gel can reduce acute symptoms and heal acid-damaged tissues.
Various biodegradable polymers used for the formulation of in situ gels include gellan gum, alginic acid, xyloglu-can, pectin, chitosan, poly (DL-lactic acid), poly (DL-lactide-co-glycolide), and poly-caprolactone.
It is a combination of two ingredients, alginic acid and calcium carbonate that activates the disintegration system.
The microgel material may be made from a variety of gellants including hydrophilic proteins such as gelatin and collagen, and hydrophilic polysaccharides such as agar, curdlan, scleroglucan, schizophyllan, gellan gum, alginic acid, carrageenan, mannan, pectin and hyaluronic acid.