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Hosseini Seyed Ehsan Butler Brayden 《Journal of Thermal Analysis and Calorimetry》2021,144(3):763-778
Journal of Thermal Analysis and Calorimetry - Solar is one of the most promising energy sources because of the abundance of solar radiation in certain parts of the world. One of the main limiting... 相似文献
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Jones MW Mantovani G Blindauer CA Ryan SM Wang X Brayden DJ Haddleton DM 《Journal of the American Chemical Society》2012,134(17):7406-7413
Direct polymer conjugation at peptide tyrosine residues is described. In this study Tyr residues of both leucine enkephalin and salmon calcitonin (sCT) were targeted using appropriate diazonium salt-terminated linear monomethoxy poly(ethylene glycol)s (mPEGs) and poly(mPEG) methacrylate prepared by atom transfer radical polymerization. Judicious choice of the reaction conditions-pH, stoichiometry, and chemical structure of diazonium salt-led to a high degree of site-specificity in the conjugation reaction, even in the presence of competitive peptide amino acid targets such as histidine, lysines, and N-terminal amine. In vitro studies showed that conjugation of mPEG(2000) to sCT did not affect the peptide's ability to increase intracellular cAMP induced in T47D human breast cancer cells bearing sCT receptors. Preliminary in vivo investigation showed preserved ability to reduce [Ca(2+)] plasma levels by mPEG(2000)-sCT conjugate in rat animal models. 相似文献
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Wulin Qiu Justin Vaughn Gongping Liu Liren Xu Mark Brayden Marcos Martinez Thomas Fitzgibbons Graham Wenz William J. Koros 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(34):11826-11829
This study reports 6FDA:BPDA‐DAM polyimide‐derived hollow fiber carbon molecular‐sieve (CMS) membranes for hydrogen and ethylene separation. Since H2/C2H4 selectivity is the lowest among H2/(C1‐C3) hydrocarbons, an optimized CMS fiber for this gas pair is useful for removing hydrogen from all‐cracked gas mixtures. A process we term hyperaging provides highly selective CMS fiber membranes by tuning CMS ultramicropores to favor H2 over larger molecules to give a H2/C2H4 selectivity of over 250. Hyperaging conditions and a hyperaging mechanism are discussed in terms of an expedited physical aging process, which is largely controlled by the hyperaging temperature. For the specific CMS material considered here, a hyperaging temperature beyond 90 °C but less than 250 °C works best. Hyperaging also stabilizes CMS materials against physical aging and stabilizes the performance of H2 separation over extended periods. This work opens a door in the development of CMS materials for the separation of small molecules from large molecules. 相似文献
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