1 introduction carrageenans are sulfated galactans, extracted from red algae ( rhodophyta), composed of d-galactose residues linked alternately in a α-1,3 and β-1,4 bonds they are classified as kappa (κ), iota (ι), and lambda (λ) according to their sulfate substitution pattern and 3,6-anhydrogalactose content these. Carrageenan or known as carrageen gum is a family of polysaccharides which extracted from red seaweeds of the rhodophycaea family (gunning et al, 1998) kappaphycus alvarezii (euchema cottoni) is used in this process because it contains mainly kappa (k) carrageenan and this is the carrageenan that forms a gel. The yieid and gel strength of carrageenan were obtained with alkali treatment ( 69o koh), for kappa car- rageenan and 6c/o naoh for iota carrageenan, at 800c for a period of 3 hours, using diliferent extract recovery methods (eg freeze- thawing, gel pressing and alcohol precipitation) the largest carrageenan yield. Rhodophyta (red algae), pheophyta (brown algae) collectively known as agarophytes agar, carrageenan and alginate are high valued seaweed polysaccharides, which are used as gelation and thickening gave the highest yield (234%) and gel strength 715 g/cm2 in kappa carrageenan extracts. Abstract this works present the extraction and isolation process of kappa carrageenan from red seaweed product from this research can be use in pharmaceutical industry for production of capsule as it give advantages in aspect of economical, health and cultural to extract and isolate kappa carrageenan, alkali. Carrageenan carrageenans form gels at low concentrations v source v structural unit v molecular structure, κ -carrageenan, ι -carrageenan, λ - carrageenan carrageenan (e407) is a collective term for scaffolding polysaccharides prepared by alkaline extraction (and modification) from red seaweed. Benefiting from this exceptional location, gelymar is one of the very few using fresh/wet high purity red seaweed in its manufacturing process gelymar is one of the main worldwide supplier of kappa ii and high viscosity carrageenans it has developed the broadest spectrum of extraction technologies in the world, using half.
Carrageenans are linear sulfated polysacharrides extracted from certain species of red algae (seaweed) of the rodophyceae class the concentration and composition of carrageenan found in seaweed varies by the species of plant for example, some seaweeds may be heavy in both kappa and iota carrageenans, while. Propenies of any particular carrageenan depend on the algal source, the method of extraction which grows in western temperate climates, but other useful red seaweed sources were later found in tropical demonstrates that the calrageenan in the untreated weed belongs to the mu/kappa carrageenan family, and. Carrageenan is extracted from species of red seaweeds this cell wall hydrocolloid is extracted with water under neutral or alkaline conditions at elevated temperature carrageenan is a multifunctional about 70% of the world's carrageenan production is based on kappa carrageenan itforms firm gels in the presence of. Cargill's is a supplier of carrageenan that is extracted from red seaweed and is used as thermo reversible gelling and thickening agent.
Natural gelling agent derived from red algae, used to create smooth, elastic gels ( iota carrageenan) or firm, brittle gels (kappa carrageenan) the salts chosen to extract carrageenan greatly depend on the desired final product and desired gelling properties, since they cause molecular rearrangement. The alkaline pretreatment duration and extraction parameters (ph, temperature, and extraction duration) of seaweeds have been systematically varied in order to produce κ/ι-hybrid carrageenans exhibiting a wide range of chemical properties the mechanical spectra and the setting and melting temperatures of gels.
Carrageenans or carrageenins are a family of linear sulfated polysaccharides that are extracted from red edible seaweeds they are widely used in the food industry, for their gelling, thickening, and stabilizing properties their main application is in dairy and meat products, due to their strong binding to food proteins. Total production of k-carrageenan extracted from red seaweed of which 55% is contributed by philippines, followed by indonesia (38%) and malaysia (25%) ( awang, et al, 2012) carrageenan is an alternating copolymer of α-(1-3)-d- galactose and β-(1-4)-3,6- anhydro-d-galactose and is classified as kappa (κ), iota (ὶ).
What is carrageenan according to the google: carrageenans or carrageenins are a family of linear sulfated polysaccharides that are extracted from red edible seaweeds they are widely used in the food industry, for their gelling, thickening, and stabilizing properties edible seaweeds, like kelp and nori,. It is then heated with water containing an alkali, such as sodium hydroxide, for several hours, with the time depending on the seaweeds being extracted and determined by iota-containing seaweeds can also be processed by his method , although the markets for iota carrageenan are significantly less than those for kappa.
With a view to findout a suitable method for carrageenan extraction from kappaphycus alvarezii, a detailed investigation was made on quantitative and qualitative estimation of carrageenan subjected to different physical and chemical treatments the dried material presoaked in koh and heated for 5 hours at 900c and. Carrageenan is a general name for polysaccharides extracted from certain kinds of algae which are built up, in contrast to agar, from d-galactopyranose units only now the industry uses a variety of sources of red algae for the production of different types of carrageenan with hand-collected plants from chile, eucheumoid. Commercial carrageenans are extracted from the carrageenophyte red seaweed genera kappaphycus gigartina, eucheuma, chondrus, and hypnea, in which the carrageenans comprise up to 50% of the dry weight  κ-carrageenan is mostly extracted from kappaphycus alvarezii, known in the trade as.