Potassium gellan

Fig. 35.—(a) Stereo view of about a turn of the 3-fold double helix of potassium gellan (41). The two chains are drawn in open and filled bonds for distinction. Both intra- and inter-chain hydrogen bonds stabilize the helix. The vertical line is the helix axis. Octahedrally coordinated potassium ions (crossed circles) and triply hydrogen-bonded water molecules (open circles) located above the ions are integral components of the structure of 41. 

Figure 4. X-ray diffraction pattern from a well oriented and polycrystalline fiber of potassium gellan using CuKa radiation. (Reproduced with permission from Ref. 13. Copyright 1988 Elsevier.)...

Fig. 34.—X-Ray diffraction pattern from a polycrystalline and the well-oriented fiber of the potassium salt of gellan (41) shows 3-fold helix symmetry.

Potassium native gellan, 389-391,430-431 Pseudo-oligosaccharides, spirodioxanyl, 220-221 Pyramine... 

Gellan gum with various acyl contents in the presence or absence of potassium. Food Hydrocolloids 22,1148-1159. 

HV Alginate/Gellan Protamine sulfate/Calcium and Potassium Chloride 6... 

Figure 5. A stereo view of the gellan double-helix featuring the intrachain hydrogen bonds (thin dashed lines), interchain hydrogen bonds (thick dashed lines), potassium ions (filled circles), and water molecules (open circles) and the six ligands attached to each potassium ion (thin lines).

Figure 7). The gellan molecules are crosslinked by double-helix — potassium — water — potassium — double-helix interactions which are responsible for subsequent gelation process. 

An X-ray crystal structure analysis has shownthat, in oriented fibers of the potassium salt of gellan, a microbial polysaccharide, the potassium ion is coordinated to both carboxylate oxygen atoms of ) D-glucuronate and to... 

Bisisostearamidopropyl ethoxyethyl dimonium chloride C12-14 alkyl dimethyl betaine Carbomer 934 Carbomer 940 Carbomer 941 Dihydroxyethyl tallow glycinate Gellan gum Lactamide MEA Magnesium aluminum silicate Oleamide DEA Palm kernelamide MEA PEG-8 dilaurate PEG distearate PEG-4 laurate PEG-12 laurate PEG palmitate Potassium alginate PVM/MA, copolymer Sodium... 

Fig. 244A, B. Temperature dependence of the storage Young modulus E and the loss tangent tan S at 2.5 Hz and small strain amplitude A for a potassium type gellan (called FI) B for the same gdlan in the presence of 100 mmol/i KQ (called F3 gellan concentration in wt% (a) 0.7 (b) (c) 1.A (d)...

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