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...

background: sulfur compounds must be removed from petroleum because they contribute to environmental pollution. a strong alkaline solution such as caustic soda is used to remove these compounds. this spent caustic has high values for chemical oxygen demand (cod) concentration, ph and total sulfur. in this study, the regeneration and treatment methodology of sulfidic spent caustic was investigat...

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...

in order to simultaneously improve wet and dry strengths of paper and decrease environmental issues related to the wet strength resins, in this study effect of application method of wet strength additives on paper properties was investigated. wet strength resins were applied in four methods including spraying an aqueous glyoxal solution on to the surface of wet paper, addition of aminated polya...

Progress in the processing of wet tissues, without the need of fixation and complex preparation procedures, may facilitate the microscopic examination of tissues and cells. Microscopic examination of tissues is a central tool in clinical diagnosis as well as in diverse areas of research. The authors present the application of Wet SEM, a technology for imaging fully hydrated samples at atmospher...

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...

Highly stable DNA-mediated Pt@DNA organosols were prepared by a simple wet chemical method and fruitfully utilized as catalysts for the reduction of aromatic nitro compounds substrates surface-enhanced Raman scattering (SERS) studies.

Toluidine Blue O (TBO) is a cationic dye which is extensively used in the industries. In the present paper a simple and efficient wet chemical method was introduced for removal of TBO from waste aqueous solution. Magnetic multi-walled carbon nanotubes were synthesized using commercially available multi-wall carbon nanotubes and magnetic iron oxide nanoparticles which were examined for removal o...

In this paper, we present result on the development of a simulation tool for the three-dimensional anisotropic wet chemical etching of bulk silicon etching or bulk micromaching. As a test of our simulation tool, we present several simulation results. Several simulation results demonstrate our simulation tool which is quite efficient for the design and development of MEMS device structure. The d...