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241.
Together with the known cacospongionolide, three new related sesterterpenes have been isolated from the sponge Fasciospongia cavernosa, collected from the Northern Adriatic Sea. The structures of the new compounds were proposed on the basis of spectroscopic data. 相似文献
242.
The physical immobilization behavior of horseradish peroxidase (HRP) on cellulosic fiber surfaces was characterized using adsorption and inactivation isotherms measured by the depletion method followed by fitting of Langmuir’s and Freundlich’s models to the experimental data. The adsorption and inactivation behavior of simpler and relatively non-porous high and low crystalline cellulosic substrates (microcrystalline cellulose and regenerated cellulose) as well as more complex and porous cellulosic pulp fibers (bleached kraft softwood fibers) were investigated. The effect of the sorbent surface energy on HRP adsorption was demonstrated by increasing the hydrophobicity of the cellulosic fibers using an internal sizing agent. The influence of the fiber surface charge density on HRP adsorption was studied via modification of the cellulosic fibers using TEMPO (2,2,6,6-tetramethyl-1-piperidiniloxy radical)-mediated oxidation methods. Results showed that hydrophobic interactions had a much larger effect on HRP adsorption than electrostatic interactions. More hydrophobic fiber surfaces (lower polar surface energy) result in larger enzyme-fiber binding affinity constants and higher binding heterogeneity. It was also found that oxidation of the cellulosic fiber substrate reduces enzyme adsorption affinity but significantly increases the loading capacity per unit weight of the surface. 相似文献
243.
Dr. Sabina Rodríguez‐Hermida Dr. Min Ying Tsang Claudia Vignatti Dr. Kyriakos C. Stylianou Dr. Vincent Guillerm Dr. Javier Pérez‐Carvajal Prof. Francesc Teixidor Prof. Clara Viñas Dr. Duane Choquesillo‐Lazarte Dr. Cristóbal Verdugo‐Escamilla Dr. Inmaculada Peral Dr. Jordi Juanhuix Dr. Albert Verdaguer Dr. Inhar Imaz Prof. Daniel Maspoch Dr. José Giner Planas 《Angewandte Chemie (International ed. in English)》2016,55(52):16049-16053
Materials with surfaces that can be switched from high/superhydrophobicity to superhydrophilicity are useful for myriad applications. Herein, we report a metal–organic framework (MOF) assembled from ZnII ions, 1,4‐benzenedicarboxylate, and a hydrophobic carborane‐based linker. The MOF crystal‐surface can be switched between hydrophobic and superhydrophilic through a chemical treatment to remove some of the building blocks. 相似文献
244.