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Carrageenan, kappa highly pure Carrageenans are agar-related hydrocolloids consisting of esters of galactose and anhydrogalactose polysaccarides. Kappa Carrageenan is obtained by alkaline extraction from red algae ( Rhodophyceae ) of the order Gigartinales , purified by filtration and recovered by KCl precipitation. In ionic solutions, heat-solubilized kappa Carrageenan self-assembles into helical structures and gels during cooling, the gel parameters depending on the ions present: Potassium ions form rigid gels, calcium gels are strong but more flexibel.
Product Detail
Carrageenan, kappa highly pure Carrageenans are agar-related hydrocolloids consisting of esters of galactose and anhydrogalactose polysaccarides. Kappa Carrageenan is obtained by alkaline extraction from red algae ( Rhodophyceae ) of the order Gigartinales , purified by filtration and recovered by KCl precipitation. In ionic solutions, heat-solubilized kappa Carrageenan self-assembles into helical structures and gels during cooling, the gel parameters depending on the ions present: Potassium ions form rigid gels, calcium gels are strong but more flexibel.
Product Detail
Carrageenan, kappa highly pure Carrageenans are agar-related hydrocolloids consisting of esters of galactose and anhydrogalactose polysaccarides. Kappa Carrageenan is obtained by alkaline extraction from red algae ( Rhodophyceae ) of the order Gigartinales , purified by filtration and recovered by KCl precipitation. In ionic solutions, heat-solubilized kappa Carrageenan self-assembles into helical structures and gels during cooling, the gel parameters depending on the ions present: Potassium ions form rigid gels, calcium gels are strong but more flexibel.
Product Detail
GELRITE ® Gelrite ® for microbiology GELRITE ® is a highly-purified, natural heteropolysaccharide which forms stable, agar-like gels when exposed to soluble salts. Compared to agar however, only about half the amount is required. Advantages over agar: consistent product quality almost 100 % batch-to-batch conformity forms remarkably clear gels reduces preparation time as gels form faster remains stable even at high temperatures and is therefore also ideal for thermophilic microorganisms; gels can withstand repeated autoclaving without any changes to gel strength indicates no toxic contaminations (e.g. through phenols, as found in agar) is chemically inert against most media additives is resistant to enzymatic degradation is non-toxic (no signs of toxicity in rats exposed to a dose of 5.000 mg/kg) is very economical to use GELRITE ® has been specially developed as a gelling agent for microbiological culture media. It can however, replace agar in other applications, too. Polymerisation of GELRITE ® is enhanced in the presence of (bivalent) kations. It is therefore supplemented by MgCl 2 if a solid gel structure is required. Elevated salt concentrations increase gelling temperature (e.g. 500 mM Na + to approx. 68 °C with 1 % GELRITE ® ). When using very high salt concentrations like e.g. seawater, gelling capacity may be significantly reduced. Chemical composition: Linear polysaccharide comprising of O-acetylate glycuronic acid, glucose and rhamnose units.
Product Detail
GELRITE ® Gelrite ® for microbiology GELRITE ® is a highly-purified, natural heteropolysaccharide which forms stable, agar-like gels when exposed to soluble salts. Compared to agar however, only about half the amount is required. Advantages over agar: consistent product quality almost 100 % batch-to-batch conformity forms remarkably clear gels reduces preparation time as gels form faster remains stable even at high temperatures and is therefore also ideal for thermophilic microorganisms; gels can withstand repeated autoclaving without any changes to gel strength indicates no toxic contaminations (e.g. through phenols, as found in agar) is chemically inert against most media additives is resistant to enzymatic degradation is non-toxic (no signs of toxicity in rats exposed to a dose of 5.000 mg/kg) is very economical to use GELRITE ® has been specially developed as a gelling agent for microbiological culture media. It can however, replace agar in other applications, too. Polymerisation of GELRITE ® is enhanced in the presence of (bivalent) kations. It is therefore supplemented by MgCl 2 if a solid gel structure is required. Elevated salt concentrations increase gelling temperature (e.g. 500 mM Na + to approx. 68 °C with 1 % GELRITE ® ). When using very high salt concentrations like e.g. seawater, gelling capacity may be significantly reduced. Chemical composition: Linear polysaccharide comprising of O-acetylate glycuronic acid, glucose and rhamnose units.
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Agar-Agar, danish standardized carrageenan mixture, sugar-containing, powdered Each lot of this Carrageenan mixture is standardised with sugars and KCl to the gel strength noted in the type analysis. Further information on analysis data see Chemicals A-Z.
Product Detail
Agar-Agar, danish standardized carrageenan mixture, sugar-containing, powdered Each lot of this Carrageenan mixture is standardised with sugars and KCl to the gel strength noted in the type analysis. Further information on analysis data see Chemicals A-Z.
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