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Biopolymers compose the morphological structures generated in all living organisms. The macroscopic physical properties of biopolymers like keratin are due both to molecular level structure and microcrystallinity, the self-consistent packing arrays of molecular order within a defined space. Processing fiber into end products can retain the microcrystalline properties of the starting materials.
A synthetic protocol for the preparation of a variety of high-quality periodic mesoporous organosilicas (PMOs) is presented. These nanostructured organosilicas have been synthesized by the acid-catalyzed hydrolysis and condensation of bis(triethoxysilyl) precursors containing different organic bridging groups. Polyoxyethylene(10) stearyl ether (Brij76) is employed as the structure director using the...
The sorption and desorption of alachlor, metolachlor and linuron onto kaolinite and Namontmorillonite and the influence of natural organic matter sorbed to these clays was examined. The intensity of adsorption was a function of the herbicide and clay. Sorption isotherms conformed to the Freundlich equation with K f(ads) values ranging from l.63 x 10 -3 ...
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