Maleic anhydride-acylated chitosan (MAAC) was prepared and employed to improve the wet strength of handsheets. UV-Vis spectroscopy, elemental analysis, and chemical titration methods were used to analyze the resultant MAAC. Pretreatment and curing conditions were investigated when MAAC was used to improve the wet strength of handsheets. The results revealed that the wet strength performance was...

This paper presents the fabrication and characterisation of wet and reactive ion etched ridge waveguide InGaAs/InGaAsP/InP lasers with an operating wavelength of 1.5μm. Characterisation results of InGaAs/InGaAsP/InP lasers are given of two etching methods, namely wet chemical etching and reactive ion etching. Relative advantages and disadvantages of these two methods are also discussed comparat...

We present an extension of equilibrium wetting to nonequilibrium situations particularly suited to systems with anisotropic interactions. Both critical and complete wetting transitions were found and characterized. We have identified a region in the space of parameters (temperature and chemical potential) where the wet and non-wet phases coexist. Emphasis is made on the analogies and difference...