A tandem time-of-flight mass spectrometer for the study of photodissociation of biopolymer ions generated by matrix-assisted laser desorption ionization was designed and constructed. A reflectron with linear and quadratic (LPQ) potential components was used. Characteristics of the LPQ reflectron and its utility as the second stage analyzer of the tandem mass spectrometer were investigated. Perf...

Our cells, muscles, and connective tissue owe their remarkable mechanical properties to biopolymer networks. Their incessant assembly, disassembly, restructuring, and active and passive mechanical deformation underlies the astounding robustness, adaptability, physical strength and motility of cells and of biological tissue in general. Unlike the flexible polymer networks discussed in standard t...

The biopolymer bacterial nanocellulose presents attractive mechanical and anti-adherent properties for innovative hernia repair solutions.

Introduction Measurement of volumetric properties of biopolymers in dilute solution has always been a difficult procedure, involving tedious experiments using densitometric or dilatometric methods to determine partial molar volumes. Measuring volume changes (∆Vunf) for biopolymer unfolding is also problematic and most often carried out using large, reinforced optical cells up to pressures of 10...

in the present study, the synthesis of diethylene triamine supported on cellulose biopolymer as a biodegradable solid basic heterogeneous catalyst was suggested. then, the applicability of the synthesized catalyst cellulose bonded n-propyl diethylene triamine (cbpdeta) was tested for the synthesis of oxindole derivatives, an important class of potentially bioactive compounds. a various series o...