The dissolution kinetics and molecular weight in main-chain scission type resists such as poly(methyl methacrylate) (PMMA) ZEP520A were investigated using a quartz crystal microbalance (QCM) method Gel Permeation Chromatography (GPC) to clarify the effects of after polymer degradation on kinetics. G-values main chain scissions PMMA are estimated GPC measurement. G-value showed higher than that ...

The depolymerization of natural biomass-based lignin is a definitive challenge, as it involves the integral breakdown complex and well-constructed structures. A sustainable method called ‘ionoSolv pretreatment’ employs ionic liquids in biomass processing. In this study, Bronsted acidic IL (BAIL); 1-methyl-3-(3-sulfopropyl)-imidazolium chloride, [C3SO3HMIM]Cl was synthesized commendably used to ...

A low molecular weight polypeptide with multiplication-stimulating activity (MSA) was isolated from serum-free media conditioned by a clone of normal Buffalo rat liver cells. The purification of MSA was achieved by gel permeation chromatography of the acid-soluble growth-promoting activity on Bio-Gel P-10 in 1 M acetic acid and followed by reversed phase high pressure liquid chromatography on m...

A unique polypeptide, called enhancing factor (EF), which enhances the binding of labeled epidermal growth factor (EGF) to cells, has been isolated. It has been purified to homogeneity from the acid-soluble proteins of mouse intestines. Earlier, EF was partially purified by two cycles of gel-permeation chromatography on Bio-Gel columns. We now report the final purification of EF on high-perform...

For purification of peptides, it is often difficult to use methods similar to those applied in the purification of other organic compounds, mainly due to their complexity. Purification of organic molecules often uses methods based on crystallization to isolate the desired molecule. As efficiency and high yields are of vital importance for optimal economy of any industrial manufacturing process,...