نتایج جستجو برای: polymersome

تعداد نتایج: 167  

Journal: :Nanoscale 2014
David Gräfe Jens Gaitzsch Dietmar Appelhans Brigitte Voit

Polymeric vesicles or polymersomes are one of the supramolecular entities at the leading edge of synthetic biology. These small compartments have shown to be feasible candidates as nanoreactors, especially for enzymatic reactions. Once cross-linked and equipped with a pH sensitive material, the reaction can be switched off (pH 8) and on (pH 6) in accordance with the increased permeability of th...

2011
Ho Cheung Shum David A. Weitz

We introduce an approach that combines the concepts of emulsiontemplating and dewetting for fabricating polymersomes with a large number of compartments. The resultant polymersome gel behaves as a gel-like solid, but is a true vesicle suspended in an aqueous environment. Due to the thin membranes that separate the compartments, the polymersome gels have a high volume fraction of internal phase ...

Journal: :Biomacromolecules 2007
Madhavan Nallani Hans-Peter M de Hoog Jeroen J L M Cornelissen Anja R A Palmans Jan C M van Hest Roeland J M Nolte

Polystyrene-polyisocyanopeptide (PS-PIAT) polymersomes containing CALB in two different locations, one in the aqueous inner compartment and one in the bilayer, were investigated for enzymatic ring-opening polymerization of lactones in water. It is shown that the monomers 8-octanolactone and dodecalactone yield oligomers with this polymersome system. It is also observed that the polymerization a...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2009
Joshua S Katz Dalia H Levine Kevin P Davis Frank S Bates Daniel A Hammer Jason A Burdick

Biodegradable polymersomes are promising vehicles for a range of applications. Their stabilization would improve many properties, including the retention and controlled release of polymersome contents, yet this has not been previously accomplished. Here, we present the first example of stabilizing fully biodegradable polymersomes through acrylation of the hydrophobic terminal end of polymersome...

Journal: :Biomaterials science 2016
Xifeng Liu Michael J Yaszemski Lichun Lu

We report a new crosslinked polymersome with pH-responsive swelling properties through acidic hydrolysis of hydrophobic contents from the amphiphilic polymer chains. Its unique stability under physiological conditions and large swelling capability under low pH conditions give this polymersome promising potential for anticancer drug delivery.

2011
Ho Cheung Shum David A. Weitz

Abtract We introduce an approach that combines the concepts of emulsion-templating and dewetting for fabricating polymersomes with a large number of compartments. The resultant polymersome gel behaves as a gel-like solid, but is a true vesicle suspended in an aqueous environment. Due to the thin membranes that separate the compartments, the polymersome gels have a high volume fraction of intern...

Journal: :Nanoscale 2010
Hans-Peter M De Hoog Isabel W C E Arends Alan E Rowan Jeroen J L M Cornelissen Roeland J M Nolte

In this study we report the immobilization of enzyme-containing polymersomes into a macromolecular hydrogel. Whereas free enzyme shows progressive leakage from the hydrogel in a period of days, leakage of the polymersome-protected enzyme is virtually absent. The preparation of the hydrogel occurs under mild conditions and does not inhibit the activity of the encapsulated enzymes nor does it aff...

Journal: :Nanoscale 2021

Schematic overview of the thiol assisted polymersome attachment and formation solid supported planar polymer membranes.

Journal: :Nanoscale 2021

Polymersome-based bioluminescent nanocompartment to achieve enzyme protection and switch kinetics produce a persistent light signal.

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