Results 271 to 280 of about 296,899 (292)
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pH-responsive Dendritic Gelators
Chemistry Letters, 2011Abstract The pH responsibility of cationic charged dendrons, which were previously synthesized for DNA-sensing applications, was investigated. The first and second generation amide dendrons G1 and G2 formed hydrogels under basic conditions, but the hydrogel returned to the fluid state under acidic conditions; this process was completely ...
Ching-Yi Chen +6 more
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pH responsive graft copolymers of chitosan
International Journal of Biological Macromolecules, 2016Grafting suitable polymers onto chitosan can produce cationic or polyampholyte polymers or hydrogels that are potential smart biomedical materials. Chitosan-graft-[poly(diethylamino)ethyl methacrylate] has been prepared in three different physical forms as linear free chains in solution, chemical gels crosslinked with glutaraldehyde, and poly ...
Elvan, Yilmaz +3 more
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pH-responsive PepFect cell-penetrating peptides
International Journal of Pharmaceutics, 2016A series of cell-penetrating PepFect peptide analogues was developed by substitutions of the galanin-derived N-terminal sequence. Histidine modifications were incorporated in order to make the peptides pH-responsive. The peptides were all able to form non-covalent complexes with an oligonucleotide cargo by co-incubation in buffer.
Regberg +5 more
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pH-Responsive Reversibly Swellable Nanotube Arrays
Langmuir, 2009We demonstrate a technique for synthesizing substrate-bound arrays of submicrometer-sized reversibly swellable tubes by using porous templates. The sacrificial template approach allows straightforward control over the tube length, diameter, and lateral arrangement of the resultant surface-bound nanotubes.
Khek-Khiang, Chia +2 more
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pH‐Responsive Polymers as Gene Carriers
Macromolecular Rapid Communications, 2010AbstractDespite the immense potential of non‐viral delivery system in gene therapy its application has been impaired greatly by various impediments having contrasting traits. Therefore it is an absolute necessity to develop some non‐viral vectors which are endowed with special characteristics to act differently in intracellular as well as extracellular
Park, IK +5 more
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Polyelectrolyte compaction by pH-responsive agents
Physical Chemistry Chemical Physics, 2009Compaction of negatively charged polyanions by polycations with different characteristics is investigated using Monte Carlo simulation in a coarse-grain model. Two different routes are tested and the results compared. In one, the polycation/polyanion charge ratio is varied by increasing the amount of polycations, keeping all the chain characteristics ...
A F, Jorge +3 more
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pH-Responsive Chitosan-Mediated Graphene Dispersions
Langmuir, 2010Homogeneous aqueous suspensions of graphene have been prepared by chemical reduction of graphene oxide in the presence of chitosan. The graphene sheets in thus prepared suspensions can be switched reversibly between a well dispersed and a more aggregated state with pH as a stimulus.
Ming, Fang +4 more
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pH-responsive release from polypeptide microcapsules
Journal of Applied Polymer Science, 1997Microcapsules were prepared from [Glu(OMe)] m (Sar) n (m = 21, n = 19) and [Lys(Z)] m (Sar) n (m = 27, n = 15), and were chemically modified to obtain a pH-responsive releasing membranes. One membrane was prepared by partially deprotecting the ester groups of [Glu(OMe)] m (Sar) n .
T. Kidchob, S. Kimura, Y. Imanishi
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pH-Responsive Biocompatible Supramolecular Peptide Hydrogel
The Journal of Physical Chemistry B, 2019Peptide-based hydrogels are highly promising for various biomedical applications owing to their precise self-assembly, biocompatibility, and sensitivity toward biologically relevant external stimuli. Herein, we report pH-responsive self-assembly and gelation of a highly biocompatible amphiphilic peptide PEP-1.
Goutam Ghosh +3 more
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Electrospinning polyelectrolyte complexes: pH-responsive fibers
Soft Matter, 2015Fibers were electrospun from a solution comprised of oppositely charged polyelectrolytes, poly(acrylic acid) and poly(allylamine hydrochloride), in efforts to achieve highly confined macromolecular packaging featuring reversible responsive behavior under pH stimuli.
Boas, Mor +4 more
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