Gum arabic karaya

The extracellular plant gums and mucilages (gum arabic, karaya gum. and tragacanlh, for example) generally have a more complex structure... 

Gums. Gum arabic, karaya. Stabilisers in flavour emulsions (van Ketel 1984 Ilchyshyn and Smith... 

Several naturally occurring anionic polysaccharides exist alginic acid, pectin, carrageenans, xanthan gum, hyaluronic acidic, gum exudates (gum arabic, karaya, traganth, etc.). Cross-linking sites that occur when a polyvalent cation (e.g. Ca +) causes interpolysaccharide binding are called "junction zones . 

Gum ghatti is the calcium and magnesium salt of a complex polysaccharide which contains L-arabinose, D-galactose, D-mannose, and D-xylose and D-glucuronic acid (48) and has a molecular weight of approximately 12,000. On dispersion in water, gum ghatti forms viscous solutions of viscosity intermediate between those of gum arabic and gum karaya. These dispersions have emulsification and adhesive properties equivalent to or superior to those described for gum arabic. 

Polysaccharide materials Starch, cellulose, plant gums (arabic gum, tragacanth, karaya, ghatti, guar, locust bean, fruit tree gum) Paper, paint binders, adhesives... 

Because of their large interfacial area, emulsions are basically unstable. In order to produce a stable emulsion, a surfactant is mostly needed. The surfactants are adsorbed at the oil-water interface, forming a link between the two phases of different polarity. For this purpose, a wide variety of emulsifying agents is currently available. Polysaccharides such as arabic gum, tragacanth, Karaya gum, and different seaweed carbohydrate polymers have been employed. They, however, show considerable batch-to-batch variations and might support microbial growth. 

Although many plant gum exudates are known (37,38), only gum arabic, ghatti, karaya, and tragacanth have wide industrial use. 

Binders used include gum arabic, gum tragacanth, glue, dextrin, sodium alginate, rubber cement, and karaya gum. 

Natural gums include plant exudates, seed gums, plant extracts, seaweed extracts, and the extracellular microbial polysaccharides. Plant exudates include gum arabic, gum ghatti, gum karaya, and gum tragacanth. Seed gums include... 

Pectin and pectinates alginate, agar, carrageenan, furcellaran Gums (arabic, guar, locust bean, carob, karaya, adragant, tara, sterculia, tamarind, ghatti)... 

Plant exudates Gum Arabic Adraganta gum Karaya gum Gatti gum... 

Figure 3. Five gum samples from species of major artistic importance. Note the similarity in shade of the kuteera, karaya, and pale gum arabic tears. All three tears of gum arabic are from the same tree yet one is as dark as the cherry gum. Chemically, the pale and dark samples are identical by monosaccharide analysis. Note the opacity of the sample from Anogeissus latifolia.

Add to each of two test tubes 5 ml of soap solution. Add to one tube 2-3 drops of one per cent solution of gum karaya (or gum tragacanth or gum arabic). Place thumb over each tube, shake well for 10 seconds, and observe the length of time required for the lather to disappear in each tube. 

Tragacanth has at times been adulterated with gum karaya, gum ghatti, and gum arabic. Such admixtures can usually be detected by means of the U. S. Pharmacopeia (22) and British Pharmacopoeia (5) tests for foreign gums or during the application of the identification methods previously discussed. 

Other gums (plant exudates consisting of high polymer polysaccharides, some with a low nitrogen content) as karaya, acacia (gum arabic), and gum tragacanth may occasionally act as sensitizers (Nilsson 1960). 

Premium Gel. See Bentonite Premium Granular Gum Arabic] Premium Powdered Gum Arabic. See Acacia Premium Powdered Gum Karaya No. 1 Special] Premium Powdered Gum Karaya No. 7 Premium Powdered Gum Karaya No. 2 HV] Premium Powdered Gum Karaya No. 2 Premium Powdered Gum Karaya No. 3. See Karaya (Sterculia urens) gum Premium Spray Dried Gum Arabic. See, Acacia Prenol Prenol. See3-Methyl-2-buten-1-ol Prenyl acetate... 

Gum karaya is the dried exudation of Sterculia spp., especially Sterculia mens, and is sometimes known as Sterculia gum. Of the exudate gums, it ranks second to gum arabic in commercial utilization. 

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