Results 281 to 290 of about 296,899 (292)
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Photo-, Thermally, and pH-Responsive Microgels
Langmuir, 2006Microgels with photo-, thermally, and pH-responsive properties in aqueous suspension have been synthesized and characterized using dynamic light scattering and UV-visible spectroscopy. The new route involved first preparing poly(N-isopropylacrylamide) (PNIPAM)-allylamine copolymer microgels and a spiropyran photochrome (SP) bearing a carboxylic acid ...
Antonio, Garcia +8 more
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DNA Condensation by pH-Responsive Polycations
Biomacromolecules, 2010This work addresses the impact of pH variation on DNA-polyethylenimine (PEI) complex formation, in aqueous solution and at constant ionic strength. An initial potentiometric characterization of the acid-base behavior of PEI is carried out to measure the concentration of ionized species in the relevant systems.
Andreia F, Jorge +3 more
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Electrical conductivity of pH-responsive hydrogels
Journal of Biomaterials Science, Polymer Edition, 1997The electrical conductivity of pH-responsive hydrogels based on cross-linked poly(2-hydroxyethyl methacrylate-co-dimethylaminoethyl methacrylate) copolymers has been studied as a function of pH over the range 5-10, for copolymers containing up to 20 mol% of the amine-containing comonomer.
N F, Sheppard +3 more
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pH-Responsive Dendritic Core–Multishell Nanocarriers
Journal of Controlled Release, 2014In this paper we describe novel pH-responsive core-multishell (CMS) nanocarrier (pH-CMS), obtained by introducing an aromatic imine linker between the shell and the core. At a pH of 5 and lower the used imine linker was rapidly cleaved as demonstrated by NMR studies.
Emanuel, Fleige +4 more
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pH‐Responsive Micro‐ and Nanocarrier Systems
Angewandte Chemie International Edition, 2013Release on demand: The pH gradients between extra- and intracellular regions can be utilized for the controlled release of drugs and biological cargos from delivery systems. Biocompatible carrier systems with pH-cleavable units must fulfill many other criteria as well, for example, a long blood circulation time.
Sabrina, Nowag, Rainer, Haag
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pH‐Responsive Molecularly Imprinted Polymers
Angewandte Chemie International Edition, 2003Yasumasa, Kanekiyo +2 more
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pH-Responsive Supramolecular Structures
The integration of stimuli-responsive systems into supramolecular frameworks is an increasingly popular topic with numerous potential applications.1,2 The pockets formed through non-covalent interactions between the hydrophobic regions of amphiphilic molecules can provide a site for chemical reactions.Knežević, Anamarija, Lisjak, Ivan
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