Results 141 to 150 of about 2,523 (182)

Grafting PNIPAAm from β-barrel shaped transmembrane nanopores

Biomaterials, 2016
The research on protein-polymer conjugates by grafting from the surface of proteins has gained significant interest in the last decade. While there are many studies with globular proteins, membrane proteins have remained untouched to the best of our knowledge.
Himanshu Charan, Julia Kinzel, Ulrich Glebe, Deepak Anand, Tayebeh Mirzaei Garakani, Leilei Zhu, Marco Bocola, Ulrich Schwaneberg, Alexander Böker   +8 more
openaire   +2 more sources

Thermo‐Responsive PNIPAAm Copolymers with Hydrophobic Spacers

Macromolecular Symposia, 2007
AbstractWe have synthesised and characterised three sets of acryloyl(amino‐acid)/NIPAAm co‐polymers. Three different co‐monomers were synthesised and copolymerized with N‐isopropylacrylamide (NIPAAm) by free radical polymerization in different molar ratios (12:1, 9:1, and 6:1). All series contain aliphatic spacers and are carboxylic terminated.
Florentina Stoica, Aline F. Miller, Cameron Alexander, Alberto Saiani   +3 more
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Mechanical and rheological behavior of pNIPAAM crosslinked macrohydrogel

Reactive and Functional Polymers, 2013
In this study for the first time we investigate the most common reticulated N-isopropylacrylamide (pNIPAAM) macrohydrogel for both its mechanical response and shear rheological behavior in time and frequency domains. Hydrogels are characterized by water content volume and weight measurements, FT-IR spectroscopy, scanning electron microscopy and ...
Puleo G. L., Zulli F., Piovanelli M., GIORDANO, MARCO, Mazzolai B., Beccai L., ANDREOZZI, LAURA   +6 more
openaire   +2 more sources

Novel renewable immunosensors based on temperature-sensitive PNIPAAm bioconjugates

Biosensors and Bioelectronics, 2008
A novel renewable immunosensor was created comprising a temperature-controlled surface composed of poly(n-isopropylacrylamide) (PNIPAAm)-antibody conjugates that could reversibly bind the antigen. Bovine serum albumin (BSA) and the corresponding antibody (anti-BSA) were chosen as a model antibody-antigen system to demonstrate the concept. The thermally
Ying, Liu, Sheng, Meng, Li, Mu, Guiying, Jin, Wei, Zhong, Jilie, Kong   +5 more
openaire   +2 more sources

Protein Resistance of PNIPAAm Brushes: Application to Switchable Protein Adsorption

Langmuir, 2009
Protein adsorption, as the primary process occurring when a foreign surface comes into contact with a biosystem, was studied on thin polymer brush films consisting of poly(N-isopropylacrylamide) (PNIPAAm) and poly(2-vinylpyridine) (P2VP). These films were prepared by the "grafting to" method. The protein resistance of stimuli responsive PNIPAAm-brushes
Sina, Burkert, Eva, Bittrich, Marco, Kuntzsch, Martin, Müller, Klaus-Jochen, Eichhorn, Cornelia, Bellmann, Petra, Uhlmann, Manfred, Stamm   +7 more
openaire   +2 more sources

Preparation and Characterization of Photo-Cross-Linked Thermosensitive PNIPAAm Nanogels

Macromolecules, 2006
Thermosensitive nanogels were prepared from photo-cross-linkable copolymers of N-isopropyl-acrylamide (NIPAAm) and 2-dimethylmaleinimido ethylacrylamide (DMIAAm). The colloidal nanogels were formed by UV-irradiated solutions of thermosensitive polymers in water at 45 °C.
Ruckling, D., Vo, C. D., Adler, H. J P, Völkel, A., Cölfen, H.   +4 more
openaire   +3 more sources

Determination of the Optical Properties of PNIPAAm Gels Used In Biological Applications

Therapeutic Laser Applications and Laser-Tissue Interactions IV, 2009
Poly(N-isopropylacrylamide) i.e. PNIPAAm is a temperature sensitive smart material which displays a lower critical solution temperature (LCST) at 33–35°C. At the lower critical solution temperature, the gel changes from hydrophilic to hydrophobic which has significant consequences in cell culturing.
A. Singh, A. E. Karsten, I. Mputle, A. Chetty, Kersch Naidoo   +4 more
openaire   +1 more source

Thermo-sensitive hydrogels membranes from PAAm networks and entangled PNIPAAm: effect of temperature, cross-linking and PNIPAAm contents on the water uptake and permeability

Reactive and Functional Polymers, 2004
Abstract In this work is presented an alternative route for preparation of membranes from thermo-sensitive hydrogels based on polyacrylamide (PAAm), network having poly(N-isopropylacrylamide) (PNIPAAm) entangled. The hydrogels were chemically synthesized by radical polymerisation using sodium persulfate as initiator.
Guilherme, Marcos Rogério, Da Silva, Rodrigo Cardoso, Rubira, Adley F., Geuskens, Georges, Muniz, Edvani C.   +4 more
openaire   +2 more sources

Fabrication and characterization of microgel-impregnated, thermosensitive PNIPAAm hydrogels

Polymer, 2005
Abstract Poly(N-isopropylacrylamide)/poly(ethylene glycol) diacrylate (PNIPAAm/PEG-DA) microgels were used as an additive during the polymerization and/or crosslinking of PNIPAAm hydrogels to improve their thermosensitive properties. The influence of this additive on the property of resulting PNIPAAm hydrogels was investigated and characterized.
Xian-Zheng Zhang, Chih-Chang Chu
openaire   +1 more source

Temperature-responsive collagen–PNIPAAm conjugate: preparation and fibrillogenesis

New Journal of Chemistry, 2020
A collagen–PNIPAAm conjugate is prepared using the “grafting from” method under mild conditions, and fibrillogenesis was realized by the induction of natural collagen.
Juntao Zhang, Fen Deng, Wei Liu, Yaozhi Huang, Xiao Tu, Huizhi Kou, Lang He, Benmei Wei, Chengzhi Xu, Haibo Wang   +9 more
openaire   +1 more source