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Factors affecting prednisolone release from hydrogels prepared with water-soluble dietary fibers, xanthan and locust bean gums.

Chemical & pharmaceutical bulletin

Watanabe K, Yakou S, Takayama K, Machida Y, Nagai T.
PMID: 1606645
Chem Pharm Bull (Tokyo). 1992 Feb;40(2):459-62. doi: 10.1248/cpb.40.459.

The release behavior of prednisolone from hydrogels prepared with xanthan and locust bean gums was investigated. Newly developed equipment was employed in order to increase the gum concentration in the hydrogels. The apparent release rate of prednisolone from the...

Bioactive polymers: in vitro and in vivo study of controlled release neomycin.

Journal of biomaterials applications

Dumitriu S, Dumitriu M, Dimitriu SM, Turcu T, Grigore L, Dumitriu D, Iacob M.
PMID: 1573555
J Biomater Appl. 1992 Jan;6(3):251-60. doi: 10.1177/088532829200600304.

Neomycin is coupled on xanthan-a polysaccharide of microbial biosynthesis produced by Xanthomonas campestris-through ionic complexation. The kinetics of neomycin release, in vitro, at pH = 8.2 is studied. A controlled release of neomycin, following a zero order kinetics is...

Industrially useful microbial polysaccharides.

Microbiological sciences

Sutherland IW.
PMID: 3153140
Microbiol Sci. 1986 Jan;3(1):5-9.

A number of microbial exopolysaccharides possess properties of industrial importance, especially as viscosifiers and gelling agents. This group of biopolymers is diverse in its chemical composition and structure; it includes both anionic and neutral polysaccharides, most of which are...

Direct measurement of forces between linear polysaccharides xanthan and schizophyllan.

Science (New York, N.Y.)

Rau DC, Parsegian VA.
PMID: 2144663
Science. 1990 Sep 14;249(4974):1278-81. doi: 10.1126/science.2144663.

Direct osmotic stress measurements have been made of forces between helices of xanthan, an industrially important charged polysaccharide. Exponentially decaying hydration forces, much like those already measured between lipid bilayer membranes or DNA double helices, dominate the interactions at...

The reliability of wormlike polysaccharide chain dimensions estimated from electron micrographs.


Stokke BT, Brant DA.
PMID: 2085656
Biopolymers. 1990;30(13):1161-81. doi: 10.1002/bip.360301303.

Electron micrographs of alginate, xylinan, xanthan, and scleroglucan were prepared by vacuum-drying aqueous glycerol-containing solutions, and then heavy-metal, low-angle rotary replicated. Quantitative methods for excluding streamlining effects and deformation artifacts were developed and applied to the digitized polymer contours...

Influence of acetyl and pyruvate substituents on the solution properties of xanthan polysaccharide.

International journal of biological macromolecules

Shatwell KP, Sutherland IW, Ross-Murphy SB.
PMID: 2078534
Int J Biol Macromol. 1990 Apr;12(2):71-8. doi: 10.1016/0141-8130(90)90056-g.

Xanthan, an exocellular polysaccharide produced by the plant pathogenic bacterium Xanthomonas campestris has been the subject of considerable interest in recent years because of its unusual rheological properties in solution ('weak gel') and consequent range of applications. The polymer...

Conformational investigation on the bacterial polysaccharide xanthan.

Carbohydrate research

Milas M, Rinaudo M.
PMID: 526953
Carbohydr Res. 1979 Nov;76:189-96. doi: 10.1016/0008-6215(79)80017-8.

The conformation of xanthan has been investigated as a function of temperature, ionic strength, and polymer concentration. A reversible transition induced by temperature is demonstrated; the melting temperature (TM) is directly correlated to the total ionic-strength and is independent...

Use of xantham gum to suspend large particles during flow cytometric analysis and sorting.


Freyer JP, Fillak D, Jett JH.
PMID: 2582972
Cytometry. 1989 Nov;10(6):803-6. doi: 10.1002/cyto.990100620.

In this report we describe the use of xantham gum as a biologically inert material for increasing the viscosity of a suspension of cells or particles during flow cytometric analysis and sorting. A 0.1% concentration of xantham gum in...

Effect of addition of water-soluble polysaccharides on bacterial cellulose production in a 50-L airlift reactor.

Biotechnology progress

Chao Y, Mitarai M, Sugano Y, Shoda M.
PMID: 11485444
Biotechnol Prog. 2001 Jul-Aug;17(4):781-5. doi: 10.1021/bp010046b.

Bacterial cellulose (BC) production was carried out in a batch cultivation of Acetobacter xylinum in a 50-L internal loop airlift reactor by addition of water-soluble polysaccharides into the medium. When 0.1% (w/w) agar was added, BC production reached 8.7...

Dynamic light scattering investigation of sodium caseinate and xanthan mixtures.

International journal of biological macromolecules

Nash W, Pinder DN, Hemar Y, Singh H.
PMID: 12297234
Int J Biol Macromol. 2002 Oct 01;30(5):269-71. doi: 10.1016/s0141-8130(02)00041-7.

Aqueous solutions of sodium caseinate and xanthan at pH 7 and containing 0.1 M NaCl, and their mixtures were investigated using dynamic light scattering. Sodium caseinate solutions showed a bimodal distribution of relaxation rates; with the aggregate peak distribution...

Evaluation of the use of xanthan as vehicle for cationic antifungal peptides.

Journal of controlled release : official journal of the Controlled Release Society

Ruissen AL, van der Reijden WA, van't Hof W, Veerman EC, Nieuw Amerongen AV.
PMID: 10370170
J Control Release. 1999 Jun 28;60(1):49-56. doi: 10.1016/s0168-3659(99)00052-8.

Oral candidiasis frequently occurs in individuals with dry mouth syndrome (xerostomia), in immunocompromised patients and in denture wearers. The aim of this study was to develop a formulation which will prolong the retention time of antimicrobial agents at the...

Bubble rise velocities and drag coefficients in non-Newtonian polysaccharide solutions.

Biotechnology and bioengineering

Margaritis A, te Bokkel DW, Karamanev DG.
PMID: 10397862
Biotechnol Bioeng. 1999 Aug 05;64(3):257-66. doi: 10.1002/(sici)1097-0290(19990805)64:3<257::aid-bit1>3.0.co;2-f.

Microbially produced polysaccharides have properties which are extremely useful in different applications. Polysaccharide producing fermentations start with liquid broths having Newtonian rheology and end as highly viscous non-Newtonian solutions. Since aerobic microorganisms are used to produce these polysaccharides, it...

Showing 1 to 12 of 1911 entries