39 research outputs found
Solution and gelling properties of gellan benzyl esters
Gellan benzyl esters of different degrees of esterification were prepared, and their gelation behavior was examined. Native gellan and gellan benzyl ester aqueous solutions and the ensuing aqueous gels obtained by cooling their solutions with added salt were studied by means of rheological and small-angle X-ray scattering experiments. Although esterification causes no fundamental changes in the gellan ordered structure, the introduction of bulky benzyl ester groups reduces the backbone propensity of double-helix formation and subsequent helix-helix association (gelation). In consequence, gellan-based gels become less stable both mechanically and thermally with esterification
Structure of Tobacco Mosaic Virus A-protein in Low Ion Concentration at Alkaline pH. (Commemoration Issue Dedicated to Professor Tatsuo Ooi, On the Occasion of His Retirment)
Bed-integrated local exhaust ventilation system combined with local air cleaning for improved IAQ in hospital patient rooms
Challenges of polyester-cotton textiles co-fractionation
Waste problem on plastic relates to micro plastic issue and synthetic textile fibers pronounce part of the problem. Inherently the problems in recycling are rising form the structure of the textiles, comprising of textile fiber blends, yarn and garment structures and well the components typical for clothing. In chemical separation methods, the sensitivity of both of the polymers defines strict limits to which conditions are possible without depolymerizing or damaging markedly either of the main components. In this paper we discuss the challange of available processes