Showing papers in "Carbohydrate Research in 2011"

TL;DR: The results revealed that the morphologies and size distribution of the CSs can be controlled by adjusting the experimental parameters.

TL;DR: Characterization of the fibers by AFM, TEM, and SEM showed that fiber diameter decreases with treatment and final nanofibril size was 10-15nm, and FT-IR, XRD, and TGA studies confirmed the removal of hemicellulose and lignin during the chemical treatment process.

TL;DR: A comparison of the pectic and hemicellulosic cell wall polysaccharides between the commonly used vegetables broccoli, carrot, and tomato reveals organ-specific characteristics, pointing to particularly long, linear pectins in tomato compared with the other vegetable organs studied, suggesting possible implications toward functional behavior.

TL;DR: Sulfated polysaccharides from brown seaweeds S. japonica and U. pinnatifida distinctly inhibited proliferation and colony formation in both breast cancer and melanoma cell lines in a dose-dependent manner indicated that the use of sulfated Polysaccharide-fucoidans frombrown seaweeds might be a potential approach for cancer treatment.

TL;DR: The TMHTMAPC exhibited enhanced antibacterial activity compared with TMC, and the activity of TMHTC increased with an increase in the degree of substitution, which indicates that the free amino group on chitosan backbone is the main functional group interacting with divalent cations.

TL;DR: The type and the amount of reducing agent, as well as the pH of the solution was shown to affect the size and morphology of the NPs.

TL;DR: It is noteworthy that hemicelluloses isolated with the different alkaline solutions presented different chemical compositions and slightly dissimilar structural features, indicating that alkalinity played an important role in cleaving the chemical linkages between the hemiceLLuloses and the lignins.

TL;DR: The energetics of the closed-ring mechanism of the acid-catalysed dehydration of d-fructose to 5-hydroxymethylfurfural (HMF) is studied by carrying out canonical ensemble free-energy calculations using bias-sampling, hybrid Quantum Mechanics/Molecular Mechanics Molecular Dynamics simulations with explicit water solvent at 363 K.

TL;DR: The FA-CS nanoparticles exhibited improved uptake of HT-29 and could become a potential targeted drug delivery system for colorectal cancer.

TL;DR: A system for determining the transgalactosylation activity of β-Galactosidase from Aspergillus oryzae was developed, and its activity was determined under conditions for the synthesis of galacto-oligosaccharides and lactulose.

TL;DR: Eleven of these 'hybrid'-oligosaccharides were annotated in this study and pointed to a gastrointestinal degradation of the feeding-related HMOs, followed by conjugation with blood group specific antigenic determinants present in the gastrointestinal mucus layer.

TL;DR: The dissociation constants of 2CS-Hdhba and the stability constants of some of its metal complexes have been determined pH-metrically and the Schiff base behaves as a bidentate chelate with a single negative charge.

TL;DR: CoSO(4) in an ionic liquid, 1-(4-sulfonic acid) butyl-3-methylimidazolium hydrogen sulfate (IL-1), was found to be an efficient catalyst for the hydrolysis of cellulose at 150°C, which led to 84% conversion of MCC after 300min reaction time.

TL;DR: Al-promoted SO₄ ²⁻-/ZrO₂SBA-15 catalysts were prepared and characterized by XRD, BET, ICP and NH₃-TPD techniques and the introduction of the Al stabilizes the tetragonal phase of the ZrO and thus increases the number and intensity of acid sites.

TL;DR: The results clearly indicated that two kinds of acid-soluble chitosan had a potential to control the contamination of apricot fruits caused by B. seminalis.

TL;DR: Experimental results show the halides to influence at least two distinct steps in the reaction leading from d-xylose to furfural under acidic conditions, via different mechanisms.

TL;DR: The acidic C-2 hydrogen of imidazolium cations was shown to play a major role in the dehydration of fructose in the absence of a catalyst, such as sulfuric acid or CrCl(3) in sufficient quantities.

TL;DR: The thermodynamic study revealed negative value of enthalpy change and free energy change, indicating spontaneous and endothermic nature of the adsorption of eosin Y on to TEPA-CS.

TL;DR: A new method for the quantification of chitin and chitosan is described, based on the specific reaction between polyiodide anions and ch itosan and on measuring the optical density of the insolublepolyiodide-chitOSan complex.

TL;DR: The efficiency and fidelity of the Cu(I)-catalyzed azide-alkyne reaction are substantiated by good yields and exclusive formation of the expected 1,4-disubstituted triazole product.

TL;DR: This study aims to optimize the conditions for furfural production from hemicellulose extracted from delignified palm pressed fiber via two-stage process: acid hydrolysis followed by dehydration, using response surface methodology (RSM).

TL;DR: Among the solvents DMSO is the most efficient in promoting the dehydration of fructose to HMF, and no rehydration byproducts such as levulinic acid and formic acid are detected.

TL;DR: Good to excellent agreement was observed between predicted and experimental (1)H and (13)C NMR chemical shifts showing the utility of the method for structural determination or confirmation of synthesized oligosaccharides.

TL;DR: LMWCs could be easily and numerously generated with acid depolymerization for further biological applications and kinetics investigation showed that the complex salt, formed by amine on chitosan and acetic acid, acted as catalyst.

TL;DR: The characteristics of the interplay between the trans-sialidase and the mucins of T. cruzi are focused on and the known carbohydrate structures of the muc Ins are summarized, which are characteristic of each differentiation stage.

TL;DR: From the commercial extract of the leaves of Stevia rebaudiana, two new diterpenoid glycosides were isolated besides the known steviol glycoside including stevioside, rebaudiosides A-F, rubusoside, and dulcoside A.

TL;DR: GC-MS analysis confirms the formation of a small amount of methyl levulinate in methanolorganic solvent system.

TL;DR: In this study, chitosan-tripolyphosphate (TPP) fibers with varying phosphate contents were prepared through wet spinning in STPP baths of different pH to evaluate the influence of solution pH on the extent of ionic cross-linking and physico-chemical properties of the fibers.

TL;DR: Bioactive copper(II) complexes with polysaccharides, like pullulan and dextran, are important in both veterinary and human medicine for the treatment of hypochromic microcitary anemia and hypocupremia.

TL;DR: The 5-HMF formation reaction was found to be faster in ionic liquids than in the DMSO system, and effects of water in the reaction system, chromium valence and reaction temperature on the conversion of glucose into 5- HMF were discussed in this work.