Publications by authors named "I Reile"
Funoran and furcellaran were isolated through a successive cascade extraction process, followed by the depolymerization of extracted polymers via an auto-hydrolysis process. The molecular weight and structural peculiarities of both native and partially depolymerized polysaccharides were investigated using size-exclusion chromatography (SEC), FTIR, and NMR spectroscopy. Immunotropic effects of the native and partially depolymerized polysaccharides were explored through various in vitro assays.
View Article and Find Full Text PDFAlginates are brown algal polysaccharides consisting of β-D-mannuronic (M) and α-l-guluronic acid (G) residues linked with 1→4 glycosidic bonds. To functionalize these natural resources for biomedical use, alginates can be chemically modified, including by sulfation. Here regioselective sulfation of alginates at M-2 in DMSO with Py∙SO is described, by either sulfating alginates directly or through using alginates with added protecting groups (PG-s), including TBDMS-ether, Piv-, Bz-esters and intramolecular 3,6-lactone.
View Article and Find Full Text PDFThis study aims to determine the catalytic activity and stability of ligand-modified UiO-66 with different functional groups (-NO, -OH) in deep oxidative desulfurization from a model fuel (MF). The planar sulfur compounds included dibenzothiophene (DBT), 2-methylbenzothiazole (2-MB), and 4,6-dimethyldibenzothiophene (4,6-DMDBT) in -dodecane as the fuel phase. The synthesized functionalized metal-organic framework (MOF) samples were characterized by X-ray powder diffraction (XRD), Fourier transform infrared (FTIR), proton nuclear magnetic resonance (H NMR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), nitrogen adsorption-desorption analysis, and microwave plasma-atomic emission spectrometer (MP-AES).
View Article and Find Full Text PDFArticle Synopsis
- Researchers synthesized cellulose palmitates (CPs) using a catalyst-free method in a superbase ionic liquid environment, focusing on varying degrees of substitution (DS) influenced by temperature, time, and vinyl palmitate ratios.
- * The study detailed the effects of reaction conditions on CPs' structural composition, revealing the importance of specific hydroxy groups in the transesterification process and identifying optimal conditions that result in a DS between 0.5 to 2.3.
- * Various spectroscopic methods verified the CPs' chemical structure and stability, while comparisons of untreated and regenerated cellulose highlighted changes in their properties due to the ion liquid system used.
Article Synopsis
- The study presents a new method for transesterifying cellulose with vinyl esters using an environmentally friendly ionic liquid, [mTBNH][OAC], allowing for improved homogeneous reactions and recyclability.
- Various long-chain cellulose esters were synthesized, achieving a degree of substitution (DS) up to 1.8, with optimized reaction parameters such as temperature and reactant ratios.
- Structural and thermal analyses indicate successful incorporation of alkyl chains into cellulose, enhancing material properties and suggesting these esters could replace traditional cellulose derivatives.