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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...

Preparative route to glucuronyl donors bearing temporary protecting group at O-3 via 6,3-lactonisation by Bz(2)O or Piv(2)O.

Carbohydrate research

Kornilov AV, Sukhova EV, Nifantiev NE.
PMID: 11728399
Carbohydr Res. 2001 Dec 07;336(4):309-13. doi: 10.1016/s0008-6215(01)00272-5.

Heating of non-substituted beta-D-glucopyranuronic acids in the presence of pivalic or benzoic anhydride in DMF gives 4-O-monoacylated or 2,4-di-O-acylated 6,3-lactones that can be easily transformed into corresponding methyl uronates bearing free OH-groups at C-2 and C-3 or C-3 only,...

[Lectin activity of antitumor substances synthesized by Bacillus subtilis B-7025].

Mikrobiolohichnyi zhurnal (Kiev, Ukraine : 1993)

Podgorskiĭ VS, Kovalenko EA, Get'man EI, Potebnia GP, Tanasienko OA.
PMID: 12557488
Mikrobiol Z. 2002 Sep-Oct;64(5):10-7.

Nutrient medium, which is optimal for synthesis of biologically active substances and allows obtaining stable outflow of Bacillus subtilis B-7025 to the culture medium, has been selected under the conditions of the bacillus periodic cultivation. It has been established...

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...

Electrospray mass spectrometric decomposition of some glucuronic acid-containing flavonoid diglycosides.

Phytochemical analysis : PCA

Frański R, Eitner K, Sikorska M, Matławska I, Stobiecki M.
PMID: 12793465
Phytochem Anal. 2003 May-Jun;14(3):170-5. doi: 10.1002/pca.703.

Mass spectrometric fragmentation patterns of herbacetin 3-O-glucopyranoside-8-O-glucuronopyranoside (1), gossypetin 3-O-glucopyranoside-8-O-glucuronopyranoside (2) and takakin 7-O-glucopyranoside-8-O-glucuronopyranoside (3) were elucidated from mass spectra obtained with electrospray ionisation. The usefulness of the fragmentation patterns observed in the positive and negative mode for structural...

A synthetic heparan sulfate pentasaccharide, exclusively containing L-iduronic acid, displays higher affinity for FGF-2 than its D-glucuronic acid-containing isomers.

Bioorganic & medicinal chemistry

Kovensky J, Duchaussoy P, Bono F, Salmivirta M, Sizun P, Herbert JM, Petitou M, Sinaÿ P.
PMID: 10482449
Bioorg Med Chem. 1999 Aug;7(8):1567-80. doi: 10.1016/s0968-0896(99)00106-6.

It has been suggested that the FGF-2 binding site on heparan sulfate chains is a trisulfated pentasaccharide containing three hexuronic acid units. The configuration at C-5 of two of them being undetermined, we have synthesized the four possible pentasaccharides,...

(1)H nuclear magnetic resonance spectroscopic analysis for determination of glucuronic and iduronic acids in dermatan sulfate, heparin, and heparan sulfate.

Analytical biochemistry

Sudo M, Sato K, Chaidedgumjorn A, Toyoda H, Toida T, Imanari T.
PMID: 11567526
Anal Biochem. 2001 Oct 01;297(1):42-51. doi: 10.1006/abio.2001.5296.

(1)H NMR spectroscopy has been established for the determination of uronate residues in glycosaminoglycans (GAGs) such as dermatan sulfate (DS), heparin (HP), and heparan sulfate (HS). Because of variation in the sulfonation positions in DS, HP, or HS, interpretation...

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...

A comparison of alginate and chitosan fibres.

Medical device technology

Qin Y.
PMID: 14994638
Med Device Technol. 2004 Jan-Feb;15(1):34-7.

Alginate and chitosan are two natural polymers with many unique properties. Both polymers can be made into fibres through the wet-spinning process. This article reviews the chemical structures of alginate and chitosan and compares their performances as novel biomaterials.

Synthesis of 2,5-anhydro-(beta-d-glucopyranosyluronate)- and (alpha-l-idopyranosyluronate)-d-mannitol hexa-O-sulfonate hepta sodium salt.

Carbohydrate research

Kuszmann J, Medgyes G, Boros S.
PMID: 15178404
Carbohydr Res. 2004 Jun 01;339(8):1569-79. doi: 10.1016/j.carres.2004.03.006.

Glycosidation of 2,5-anhydro-1,6-di-O-benzoyl-D-mannitol with methyl(2,3,4-tri-O-acetyl-alpha-d-glucopyranosyl-1-O-trichloroacetimidate)uronate in the presence of trimethylsilyl triflate afforded the corresponding 3-O-beta-glycoside, which after deprotection was converted into its hexa-O-sulfate with DMF x SO3 to give after treatment with sodium acetate and subsequent saponification of the...

Showing 1 to 12 of 4061 entries