alginate

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alginate

 [al´jĭ-nāt]
a salt of alginic acid, a colloidal substance from brown seaweed; used, in the form of calcium, sodium, or ammonium alginate, for dental impression materials.

al·gi·nate

(al'ji-nāt),
An irreversible hydrocolloid consisting of salts of alginic acid, a colloidal acid polysaccharide obtained from seaweed and composed of mannuronic acid residues; used in dental impression materials.

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.

al·gi·nate

(al'ji-nāt)
An irreversible hydrocolloid consisting of salts of alginic acid, a colloidal acid polysaccharide obtained from seaweed and composed of mannuronic acid residues; used in dental impression materials.

al·gi·nate

(al'ji-nāt)
Elastic dental impression material composed of potassium alginate from kelp, calcium sulfate, and other ingredients; usually a powder to mix with water. Setting reaction cross-links alginic acid to form a semisolid.
References in periodicals archive ?
The presented modification of this dyeing process utilizes alkyl silanes acting as anchor molecules between the modified alginates and the polymeric fibers.
In this article, you'll learn about a unique approach-known as raft-forming alginate (10) --that provides inclusive relief and protection from this chronic condition that affects so many aging individuals.
The polymer films were obtained from the dispersion of polymers (sodium alginate and hydroxypropyl methylcellulose) in distilled water under environmentally controlled conditions and mechanical agitation at 400 rpm using an RZR 2020 homogenizer (Heildoph).
Future prospects and current trends of the Alginate market by the end of forecast period (2019-2025)
these include reversible hydrocolloid this includes agar impression material, irreversible hydrocolloid this includes alginate impression material, modelling plastic impressions these includes impression compounds, plaster impression material, wax impression material, silicone based impression materials, polysulfide impression materials and polyether impression materials.3
The receipt of regulatory approval to divest the heritage DuPont N and H Alginates business is a step in finalising the integration of FMC's Health and Nutrition Business.
The calcium sodium alginate dressing had the highest absorption capacity and after 4 hours, it degraded.
Sodium alginate (4g) was dispersed in 200 mL distilled water, and 20% (w/w, based on alginate) glycerol was added as a plasticizer to avoid the brittleness of the films.
The expression of genes related to alginate biosynthesis was investigated using reverse transcriptase-polymerase chain reaction (RT-PCR).
Alginate particle size is a crucial factor for many applications [12-15].
"Alginate dressings is the fastest-growing segment of wound dressings market"