Synthesis of linseed oil based biodegradable homo and copolymers: role as multifunctional greener additives in lube oil

Abstract

Homopolymer of linseed oil and its four copolymers with styrene, 1-decene, isodecyl acrylate and octyl acrylate, respectively, have been synthesized in this present context. The prepared polymers are characterized by NMR and FTIR spectroscopy. The molecular weights have been measured by gel permeation chromatography. Their effectiveness as pour point depressant (PPD), viscosity index improver (VII) and their shear stability in terms of permanent shear stability index have been evaluated in lube oil. The copolymers acted as better PPDs than the homopolymer whereas the homopolymer of linseed oil excelled as VII. Further it was observed that all the prepared polymers were stable enough under severe mechanical shear.     

Assessment of terrestrial radionuclides in the sandy soil from Guliakhali beach area of Chattogram,Bangladesh

Journal of Radioanalytical and Nuclear Chemistry - A study was conducted to assess the concentrations of primordial radionuclides in fifteen sandy soil samples collected from a newly discovered...     

Cell Surface Display of Cellulase Activity–Free Xylanase Enzyme on <Emphasis Type="BoldItalic">Saccharomyces Cerevisiae</Emphasis> EBY100

Cellulase-free xylanase has potential for its application in the selective removal of hemicellulose from kraft pulp to give good strength to paper. In this study, a gene (xyn) encoding cellulase activity–free xylanase enzyme (Xyn) was isolated from Paenibacillus polymyxa PPL-3. The xyn gene encoded a protein of 221 amino acids, and the purified Xyn was about 22.5 kDa measured by sodium dodecyl sulfate–polyacrylamide gel electrophoresis. Moreover, the cellulase activity–free xylanase enzyme (Xyn) was displayed on the cell surface of Saccharomyces cerevisiae EBY100 using Aga2p as an anchor protein. Cell surface display of xylanase enzyme (Xyn) on S. cerevisiae EBY100 was confirmed by immunofluorescence microscopy. Optimum cell surface display of xylanase enzyme (Xyn) was observed at pH 7 and 40 °C. Therefore, cell surface–displayed xylanase enzyme (Xyn) can be used in the paper industry.