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Topic: Alginate

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Alginate is present in the cell walls of brown algae as the calcium, magnesium and sodium salts of alginic acid.
The rationale behind the extraction of alginate from the seaweed is to convert all the alginate salts to the sodium salt, dissolve this in water, and remove the seaweed residue by filtration.
Alginate molecules are long chains that contain two different acidic components, abbreviated here for simplicity to M and G. The way in which these M and G units are arranged in the chain and the overall ratio, M/G, of the two units in a chain can vary from one species of seaweed to another.
www.fao.org /docrep/006/y4765e/y4765e08.htm   (5954 words)

Alginates are not random copolymers but, according to the source algae, consist of blocks of similar and strictly alternating residues (that is, MMMMMM, GGGGGG and GMGMGMGM), each of which have different conformational preferences and behavior.
The primary function of the alginates are as thermally stable cold setting gelling agents in the presence of calcium ions; gelling at far lower concentrations than gelatin.
Alginate is used in a wide variety of foodstuff such as pet food chunks, onion rings, stuffed olives, low fat spreads, sauces and pie fillings.
www.lsbu.ac.uk /water/hyalg.html   (997 words)

  ADMIX - Advanced Mixing Technologies - Alginate
The alginates have different characteristics of viscosity and reactivity based on the specific algal source and the ions in solution.
The common salts used in the food and pharmaceutical industries are sodium alginate, potassium alginate, and propylene glycol alginate.
Alginates are generally acid stable and heat resistant.
www.admix.com /Alginate.htm   (238 words)

 Healthy junkfood with seaweed alginate
Moreover, alginate is high in fibre and has been proved to be palatable and safe, and as such is already in widespread use by the food industry as a gelling agent, to reconstitute powdered foods, and to thicken the frothy head of premium lagers.
Alginic acid (algine, alginate) is a viscous gum that is abundant in the cell walls of brown algae.
Alginate is used extensivly as a mold-making material in dentistry and prosthetics, and in textiles.
www.rxpgnews.com /health/fitness/article_2498.shtml   (930 words)

 Alginic acid - Wikipedia, the free encyclopedia
Alginic acid (algine, alginate) is a viscous gum that is abundant in the cell walls of brown algae.
Alginate absorbs water quickly, which makes it useful as an additive in dehydrated products such as slimming aids, and in the manufacture of paper and textiles.
Alginate is used extensively as a mold-making material in dentistry, prosthetics, lifecasting, and in textiles.
en.wikipedia.org /wiki/Alginate   (458 words)

 Alginate - Biocrawler   (Site not responding. Last check: )
Alginate is a linear copolymer with homopolymeric blocks of (1-4)-linked ß-D-mannuronate (M) and its C-5 epimer α-L-guluronate (G) residues, respectively, covalently linked together in different sequences or blocks.
In these gels, it is mostly the homopolymeric blocks that form the junctions, where the stability of the gel is determined by the relative content of G-blocks.
Purified qualities of alginates are also available for biomedical use.
www.biocrawler.com /encyclopedia/Alginate   (261 words)

 Method of making paper from water insoluble alginate fibers and the paper produced - Patent 4104115
Alginate material in fibrous form is obtained by squirting an aqueous solution of water-soluble alginate via a spinneret into a bath of an inorganic salt, whose cation will react with the alginate to produce a water-insoluble alginate.
As a result of these failures with waste calcium alginate material from the textile industry it was concluded that the calcium alginate was at fault and that in general calcium alginate fibres could not be made into a satisfactory paper without the use of a swelling agent or adhesive binder.
The crude alginate solution (for example sodium alginate) may be obtained, for example, from seaweed by the commercially known process as shown in the first stages of the left-hand side of the flow sheet.
www.freepatentsonline.com /4104115.html   (2135 words)

Alginate, also called alginic acid or algine, is a sticky copolymer (or gel) substance found abundantly in the cell walls of brown algae.
Alginate can also be harvested from some types of bacteria.
Alginate is not soluble in water or organic solvents, but can be dissolved in sodium carbonate, sodium hydroxide, or trisodium phosphate.
www.iscid.org /encyclopedia/Alginate   (168 words)

 ISP Alginates Products   (Site not responding. Last check: )
The type of alginate (high M or high G) and the amounts of calcium salt and sequestrant employed also depend on the source of the potato raw material.
The tenuous alginate network that forms in the early stages of gel formation means that the extruded shape is retained.
Alginates also reduce oil transfer into the interior of the potato and reduce moisture loss from the potato to the skin which helps to maintain the freshly cooked crispness.
www.ispcorp.com /products/food/content/brochure/alginates/potato.html   (1499 words)

 Enzyme Entrapment in Alginate Gel
Alginate, commercially available as alginic acid, sodium salt, commonly called sodium alginate, is a linear polysaccharide normally isolated from many strains of marine brown seaweed and algae, thus the name alginate.
Different types of alginate are selected for each application on the basis of the molecular weight and the relative composition of mannuronic and guluronic acids.
After sodium alginate is completely dissolved, leave the solution undisturbed for 30 minutes to eliminate the air bubbles that can later be entrapped and cause the beads to float.
www.glue.umd.edu /~nsw/ench485/lab7b.htm   (706 words)

 794. Propylene glycol alginate (WHO Food Additives Series 32)
Alginates have valuable rheological properties which can be varied to a great extent by varying the degree of polymerisation of the polysaccharide or by changing the ionic environment.
At the seventeenth meeting an ADI for propylene glycol alginate of 0-25 mg/kg bw was allocated, based on a NOEL of 2 500 mg/kg bw/day in a long-term toxicity study in rats.
The alginate moiety and the unhydrolyzed propylene glycol alginate were not absorbed from the gastrointestinal tract, but excreted in the faeces (Sharratt & Dearn, 1972).
www.inchem.org /documents/jecfa/jecmono/v32je12.htm   (3511 words)

 Sodium Alginates and other Phyco-Polysaccharides
Calcium alginate, the calcium salt of alginic acid, is used as a wound dressing for the treatment of exudative wounds.
Sodium alginate may reduce the absorption of food carotenoids, such as beta-carotene, lycopene and lutein and such minerals in foods as calcium, magnesium, zinc, manganese and chromium.
The alginate reduce the postprandial glycaemic response by forming a gel with dietary calcium in the stomach of the rat.
www.pdrhealth.com /drug_info/nmdrugprofiles/nutsupdrugs/sod_0017.shtml   (1798 words)

 Alginate synthesis in Pseudomonas aeruginosa: the role of AlgL (alginate lyase) and AlgX -- Monday and Schiller 178 ...
Alginate synthesis in Pseudomonas aeruginosa: the role of AlgL (alginate lyase) and AlgX -- Monday and Schiller 178 (3): 625 -- The Journal of Bacteriology
Alginate synthesis in Pseudomonas aeruginosa: the role of AlgL (alginate lyase) and AlgX
Peciña, A., Pascual, A., Paneque, A. Cloning and Expression of the algL Gene, Encoding the Azotobacter chroococcum Alginate Lyase: Purification and Characterization of the Enzyme.
jb.asm.org /cgi/content/abstract/178/3/625   (637 words)

 Alginate Dressings: Frequently Asked Questions   (Site not responding. Last check: )
Alginate fibres trapped in a wound are readily biodegraded [1].
Alginates have been shown to be useful in a variety of situation; sloughy wounds which also produce a degree of exudate may be dressed with alginate dressings such as Sorbsan, Tegagen, Kaltostat (or other gel forming polysaccharide dressings).
Although alginate fibres were found to be incorporated in tissue, both dressing regimes were found to be easy to use, effective and acceptable to patients and clinicians [2].
www.worldwidewounds.com /1998/june/Alginates-FAQ/alginates-questions.html   (2459 words)

 Microbial Cell Factories | Full text | Molecular and bioengineering strategies to improve alginate and ...
Alginates extracted from algae are relatively cheap products, having selling prices in the range US$ 5–20/kg for the majority of the applications [1]; however, alginates of very high purity are used in the pharmaceutical field and these are sold for up to US$ 40,000/kg [1].
Alginates are also produced by bacteria and many of their physicochemical characteristics are similar to those of algae, so that they can be used for the same applications as algal alginates, as well as in other more sophisticated contexts.
However, a drop in the mean molecular mass of alginate was observed towards the end of the incubation period, presumably as a consequence of a de-polymerization activity carried out by an alginate lyase [47].
www.microbialcellfactories.com /content/6/1/7   (9210 words)

By using an alginate capsule as an immunoisolating barrier, we believe that it is possible to transplant cells without the use of immunosuppressives that increase the risk of infection and cancer.
Alginate consists of 50 to 200 000 units of the two sugar molecules mannuronic acid (M) and guluronic acid (G).
The composition of M and G and the length of the alginate chain determine the properties of the alginate.
www.alginatecapsules.com /forskning.html   (898 words)

The gels that form the alginates are of chemical type, they are not reversible when we heat them, and they are formed in calcium presence, that it must be added of controlled form to obtain the formation of ordered molecular associations.
Shear stress vs. shear rate for 1% of alginate with different concentrations of sugar: 0 % (o) and 40 % (·) at 25 ºC. Another form of studying the newtonian or non-newtonian behaviour of a fluid would be to represent the viscosity against the shear rate and analyze its behaviour.
Viscosity vs. shear rate for 0.5% of alginate and different concentrations of sugar: 0 % (o); 20 % (·); 30 % (□); 40 % (■), at 40 ºC. The influence of the temperature on the viscosity is shown in the Fig.
ejeafche.uvigo.es /2(3)2003/006232003F.htm   (1874 words)

 Potassium alginate
Potassium alginate is the potassium salt of alginic acid
This test distinguishes potassium alginate from gum arabic, sodium carboxymethyl cellulose, carrageenan, gelatin, gum ghatti, karaya gum, carob bean gum, methyl cellulose and tragacanth gum.
Each ml of 0.25 N sodium hydroxide consumed is equivalent to 5.5 mg of carbon dioxide (CO) or 29.75 mg of potassium alginate (equivalent weight 238).
www.fao.org /docrep/W6355E/w6355e0q.htm   (485 words)

Our alginate products are the preferred choice of E F/X and lifecasting artists, taxiderists and prosthetics makers worldwide.
Use the alginate table to select the alginate formula that is just right for your application.
Whatever proportion of our alginates to water you choose (FiberGel needs precise proportions for best application), it is advisable to mix the material very thoroughly until you achieve a smooth consistency.
www.artmolds.com /category26.cfm   (456 words)

 FMC BioPolymer - Producer of carrageenan, alginate, microcrystalline cellulose, and konjac
FMC BioPolymer - Producer of carrageenan, alginate, microcrystalline cellulose, and konjac
With over 60 years of experience FMC BioPolymer is the leader in harnessing nature's renewable resources to create ingredients and technical solutions for the food, pharmaceutical, personal care and biomedical markets.
FMC, the FMC logo and all brand names, company names, service marks, logos and trade dress of FMC or its subsidiaries, affiliates or licensors are trademarks or registered trademarks of FMC Corporation or its subsidiaries, affiliates or licensors in the U.S. and other countries.
www.fmcbiopolymer.com   (86 words)

 Identification of algF in the alginate biosynthetic gene cluster of Pseudomonas aeruginosa which is required for ...
Identification of algF in the alginate biosynthetic gene cluster of Pseudomonas aeruginosa which is required for alginate acetylation.
Albrecht, M. T., Schiller, N. Alginate Lyase (AlgL) Activity Is Required for Alginate Biosynthesis in Pseudomonas aeruginosa.
Nivens, D. E., Ohman, D. E., Williams, J., Franklin, M. Role of Alginate and Its O Acetylation in Formation of Pseudomonas aeruginosa Microcolonies and Biofilms.
jb.asm.org /cgi/content/abstract/175/16/5057   (665 words)

 Sodium Alginate Thickener
Sodium Alginate is pure kelp (sea weed) - it's commonly used to thicken food.
Sprinkle the thickener into the chemical water or liquid dye slowly, mixing continuously.
The silk one allows you to draw finer lines but requires you to use more.
www.dharmatrading.com /html/eng/2008-AA.shtml   (679 words)

 The Straight Dope: What is the "propylene glycol alginate" found in salad dressings?
The Straight Dope: What is the "propylene glycol alginate" found in salad dressings?
Propylene glycol alginate is used as a thickener and stabilizer in such products as ice cream and candy as well as salad dressing.
Originally derived from brown algae and since mixed with a few other goodies, the chemical has been used for almost a century in one form or another.
www.straightdope.com /classics/a1_223a.html   (249 words)

 manufacture of the sodium alginate,mannitol,iodine
We main have two kinds of products : Sodium Alginate and Mannitol.
Sodium alginate mainly used in starching, packing and printing,the primary operation is in printing.
The chairman Wangyongchang and of all the workers adhering to the principle of "high quality,good service,users first,prestige first "and warmly welcome friends of all trade party at home and abroat to come visiting for business negotiation and technical exchanges.
www.alginate.net   (99 words)

 YouTube - Alginate spheres
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Blueberry syrup, sodium alginate and calcium chloride is all you need to make these spheres that look a little like caviar.
khymos molecular gastronomy blueberry spheres food adria alginate calciumchloride chemistry science syringe caviar
www.youtube.com /watch?v=gV_oIuQEmGE   (594 words)

 Life casting kits and alginate molding kits to create keepsake statues of hands and feet and pregnancy belly casting.
Life casting kits and alginate molding kits to create keepsake statues of hands and feet and pregnancy belly casting.
We have a huge selection of products for all ages from new born to Adult which include: 3-Dimensional life casting kits, 2-Dimensional life casting kits and a wide selection of alginate molding powders and casting plasters in a variety of sizes.
We are proud to announce we now offer a pregnancy belly casting kit.
www.castingkits.com   (211 words)

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