Abstract Increasing the surface hydrophilicity of polyetherimide (PEI) through partial hydrolysis imide groups while maintaining length main-chain was explored for adjusting its function in biomedical and membrane applications. The outcome polymer analogous reaction, i.e., degree ring opening chain cleavage, is difficult to address bulk microstructured systems, as these changes only occur at in...

Oat (Avena sativa cv Fulghum) fructan hydrolase was purified by ammonium sulfate precipitation and anion-exchange, hydrophobic interaction, and size-exclusion chromatography. The enzyme was purified to homogeneity as determined by the presence of a single band (43 kD) on a silver-stained sodium dodecyl sulfate-polyacrylamide gel. A mixture of /3-2,6-linked fructan (neokestin) isolated from oat ...

moderate to excellent entantio- and stereoselectivities (ee’s 54-100%) were observed in ple catalyzed hydrolysis of (±)-ethyl 5-oxo-endo-tricyclo[5.2.1.02,6] deca-8-ene-2-carboxylate 5 and the structurally related open chain bicyclic structures (±)-ethyl 3-acetylbicyclo[2.2.1]hept-5-ene-2-carboxylates 7, 9 and (±)-ethyl 3-propanoylbicyclo[2.2.1]hept-5-ene-2-carboxylates 8, 10. a pronounced pref...

An adequate estimation of a proteinaceous substrate decomposition is one of the problems, frequently appearing during the protein hydrolysate technology. A combination of high-resolution 1 H NMR spectroscopy data with other technics could be a good solution of this problem. In present paper we applied high-resolution 1 H NMR spectroscopy method to characterize the degree of protein hydrolysis o...

Acrylic-type polymeric systems having degradable ester bonds linked to ibuprofen were synthesized and evaluated as materials for drug delivery. Ibuprofen, as a non-steroidal anti-inflammatory drug, was linked to 2-hydroxyethyl methacrylate by activated ester methodology in one-pot procedure. The resulting methacrylic derivative of ibuprofen was copolymerized with 2-hydroxyethyl methacrylate and...

at early stages of new product development, the effort tooptimize is low and effects on the whole innovation process are high.therefore, a deeper understanding of fuzzy front end and its successcan help firms to be more successful in developing new products. wepresented and tested a conceptual model of relationships among keyvariable sre lated to the fuzzy front end,execution phase of new produ...

new biodegradable network polymers containing siloxane-linked polymeric prodrugs of 5-ammino-2-hydroxybenzoic acid (5-asa) in the main chain were prepared by ter polymerization of methacrylic acid (ma), 2-hydroxyethylmethacrylate (hema), and bis (trimethylsilyloxy) methylsilane (vbm) in the presence of some new cross-linking agents.the monomers and polymers were characterized by ft-ir and 1h-nm...