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Synthesis of a heteroglycuronan derivative containing the beta-D-galactopyranosyluronic acid (1-->3)-L-rhamnose repeating unit.

Carbohydrate research

Vogel C, Steffan W, Boye H, Kristen H, Betaneli VI, Ott AYa, Kochetkov NK.
PMID: 1294291
Carbohydr Res. 1992 Dec 31;237:131-44. doi: 10.1016/s0008-6215(92)84238-n.

Helferich glycosylation of the cyanoethylidene L-rhamnose derivative 3 with the galactosyluronic bromide 2 gave the disaccharide 4 as a key intermediate in the synthesis of the monomer 13 for trityl-cyanoethylidene condensation (TCC). The following formation of the monomer 13,...

The controlled release of prednisolone using alginate gel.

Pharmaceutical research

Sugawara S, Imai T, Otagiri M.
PMID: 8165187
Pharm Res. 1994 Feb;11(2):272-7. doi: 10.1023/a:1018963626248.

In a release study of alginate gel beads, swelling and erosion of the beads were observed at pH 6.8, whereas no swelling occurred at pH 1.2. The amount of released prednisolone (PL) was greater at pH 6.8 than at...

Molecular motions of D-alpha-galacturonic acid (GA) and methyl-D-alpha-galacturonic acid methyl ester (MGAM) in the solid state-A proton NMR study.

Solid state nuclear magnetic resonance

Tang HR, Belton PS.
PMID: 9808293
Solid State Nucl Magn Reson. 1998 Aug;12(1):21-30. doi: 10.1016/s0926-2040(98)00041-1.

The molecular motions of D-alpha-galacturonic acid monohydrate (GA) and its derivative methyl-alpha-D-galacturonic acid methyl ester monohydrate (MGAM) in the solid state have been studied using 1H NMR. Both protonated and deuterium exchanged samples have been used. Spin-lattice relaxation times...

Effects of alginate composition on the metabolic, secretory, and growth characteristics of entrapped beta TC3 mouse insulinoma cells.


Constantinidis I, Rask I, Long RC, Sambanis A.
PMID: 10535813
Biomaterials. 1999 Nov;20(21):2019-27. doi: 10.1016/s0142-9612(99)00104-0.

The effects of alginate composition on cell growth as well as the metabolic and secretory profile of transformed beta-cells entrapped in alginate/poly-L-lysine/alginate (APA) solid beads were investigated following entrapment of beta TC3 mouse insulinoma cells in alginate composed of...

The X-ray structure of Aspergillus aculeatus polygalacturonase and a modeled structure of the polygalacturonase-octagalacturonate complex.

Journal of molecular biology

Cho SW, Lee S, Shin W.
PMID: 11518536
J Mol Biol. 2001 Aug 24;311(4):863-78. doi: 10.1006/jmbi.2001.4919.

Polygalacturonases hydrolyze the alpha-(1-4) glycosidic bonds of de-esterified pectate in the smooth region of the plant cell wall. Crystal structures of polygalacturonase from Aspergillus aculeatus were determined at pH 4.5 and 8.5 both to 2.0 A resolution. A. aculeatus...

Phase separation in calcium alginate gels.

European biophysics journal : EBJ

Straatmann A, Borchard W.
PMID: 12692695
Eur Biophys J. 2003 Aug;32(5):412-7. doi: 10.1007/s00249-003-0298-7. Epub 2003 Apr 12.

Alginates are polysaccharides consisting of beta-D-mannuronate and alpha-L-guluronate units. In the presence of bivalent cations like calcium the guluronate blocks form physically cross-linked gels. The gelation properties of alginates play an important role in the stability of extracellular polymer...

Mode of action of recombinant Azotobacter vinelandii mannuronan C-5 epimerases AlgE2 and AlgE4.


Hartmann M, Holm OB, Johansen GA, Skjåk-Braek G, Stokke BT.
PMID: 11786996
Biopolymers. 2002 Feb;63(2):77-88. doi: 10.1002/bip.10017.

The enzymes mannuronan C-5 epimerases catalyze conversion of beta-D-mannuronic acid to alpha-L-guluronic acid in alginates at the polymer level and thereby introduce sequences that have functional properties relevant to gelation. The enzymatic conversion by recombinant mannuronan C-5 epimerases AlgE4...

Gelatin blends with alginate: gels for lipase immobilization and purification.

Biotechnology progress

Fadnavis NW, Sheelu G, Kumar BM, Bhalerao MU, Deshpande AA.
PMID: 12675601
Biotechnol Prog. 2003 Mar-Apr;19(2):557-64. doi: 10.1021/bp010172f.

Blends of natural polysaccharide sodium alginate (5%) with gelatin (3%) cross-linked with glutaraldehyde provide beads with excellent compressive strength (8 x 10(4) Pa) and regular structure on treatment with calcium chloride. Lipases from porcine pancreas, Pseudomonas cepacia, and Candida...

L-Altruronic acid formed by epimerization of D-galacturonic acid methyl esters during saponification of citrus pectin.

Carbohydrate research

Zhan D, Qiu F, Mort AJ.
PMID: 11270814
Carbohydr Res. 2001 Feb 15;330(3):357-63. doi: 10.1016/s0008-6215(00)00317-7.

While searching for oligosaccharides containing rhamnose residues in the endopolygalacturonase (EPG) digest of saponified citrus pectin, we found several oligomers containing, in addition to galacturonic acid, a sugar previously unreported in pectin. The 1- and 2-D 1H NMR spectra...

A novel pH-sensitive hydrogel composed of N,O-carboxymethyl chitosan and alginate cross-linked by genipin for protein drug delivery.

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

Chen SC, Wu YC, Mi FL, Lin YH, Yu LC, Sung HW.
PMID: 15081219
J Control Release. 2004 Apr 28;96(2):285-300. doi: 10.1016/j.jconrel.2004.02.002.

A novel pH-sensitive hydrogel system composed of a water-soluble chitosan derivative (N,O-carboxymethyl chitosan, NOCC) and alginate blended with genipin was developed for controlling protein drug delivery. Genipin, a naturally occurring cross-linking agent, is significantly less cytotoxic than glutaraldehyde and...

Development of alginate wound dressings linked with hybrid peptides derived from laminin and elastin.


Hashimoto T, Suzuki Y, Tanihara M, Kakimaru Y, Suzuki K.
PMID: 14643615
Biomaterials. 2004 Mar-Apr;25(7):1407-14. doi: 10.1016/j.biomaterials.2003.07.004.

We designed hybrid peptides, SIRVXVXPG (X: A or G), from a laminin-derived peptide, SIKVAV, and an elastin-derived peptide, VGVAPG, and tried to develop new alginate dressings linked covalently with the hybrid peptides. First, we examined the effectiveness of the...

Study of the interpolyelectrolyte reaction between chitosan and alginate: influence of alginate composition and chitosan molecular weight.

International journal of biological macromolecules

Becherán-Marón L, Peniche C, Argüelles-Monal W.
PMID: 15178017
Int J Biol Macromol. 2004 Apr;34(1):127-33. doi: 10.1016/j.ijbiomac.2004.03.010.

The interpolyelectrolyte reaction between chitosan (CHI) and alginate (ALG) was followed by conductimetry and potentiometry. Five chitosan samples, all with almost the same degree of N-acetylation (DA approximately 0.20) and molecular weights ranging from 5 x 10(3) to 2.5...

Showing 1 to 12 of 4098 entries