disaccharide
2.A disaccharide that is produced from the partial hydrolysis of cellulose.
3.The major SCS is chondroitin sulfate C (CSC) that is the polymer of disaccharide units, which are glucuronic acid connect with sulfated N-acetylgalactosamine by β1→3 glucosidic bond. And the disaccharide units are connect by β1→4 glucoside bond to each other, forming the liner chain polysaccharides.
4.The cucumber resistant differences of N-acetylchitooligosaccharide analogues (β-1,3-N-acetyl-glucosamine disaccharide and β-1,3-N-acetyl -glucosamine trisaccharide) and Lewisa trisaccharide may be caused by the differences of the sugar residues, the substituents on the reducing terminal residue or (and) the oligosaccharide backbone structures.
5.The monosaccharide,disaccharide and polysaccharide have considerable influnence on the pollen germination,the tube growth and callus formation in Cercis chinensis,Syringa oblata,Prunus persica and Forsythia suspensa in vitro. The sensitivity discrepancy in view of sugar existed in the pollens of four ornamental plants.
6.Results The Bartonella sp.strains could decompose disaccharide without disassociation of glycose,trisaccharide and spirits,and produce bacillosporin with positive of glucose oxidation and ureolysis test,negative of hydrogen sulfide production test and oxidase test.
7.On the basis of 2D NMR spectral analyses, the disaccharide of 27 and 38, as well as 29 (58) , 30, 32(59),33(48),34,49,50,52,53,54 was confirmed as 1→2 linkage.
8.Six pure DS oligosaccharides (disaccharide, tetrasaccharide, hexasaccharide, octasaccharide, decasaccharide and dodecasaccharide) were obtained, The purity of each sample was confirmed on capillary electrophoresis (CE), polyacrylamide gel electrophoresis (PAGE) and analytical SAX HPLC and the structure was elucidated by using electrospray ionization mass spectrometry (ESI MS),and high field magnetic resonance (NMR) spectrometry.
