Unexpected Temperature-Dependent Single Chain Mechanics of Poly(N-isopropyl-acrylamide) in Water

Langmuir ◽  
2012 ◽  
Vol 28 (11) ◽  
pp. 5151-5157 ◽  
Author(s):  
Shuxun Cui ◽  
Xiangchao Pang ◽  
Shen Zhang ◽  
You Yu ◽  
Hongwei Ma ◽  
...  
Keyword(s):  
Single Chain ◽  
Temperature Dependent ◽  
Isopropyl Acrylamide

Nanoscale structure and dynamics of thermoresponsive single-chain nanoparticles investigated by EPR spectroscopy

Soft Matter ◽  
2021 ◽  
Author(s):  
Andreas Roos ◽  
Justus Friedrich Hoffmann ◽  
Wolfgang H Binder ◽  
Dariush Hinderberger
Keyword(s):  
Phase Transitions ◽  
Epr Spectroscopy ◽  
Water Soluble ◽  
Solution Temperature ◽  
Single Chain ◽  
Temperature Dependent ◽  
Critical Solution Temperature ◽  
Structure And Dynamics ◽  
Lcst Behavior ◽  
Nanoscale Structure

We characterize temperature-dependent macroscopic and nanoscopic phase transitions and nanoscopic pre-transitions of water-soluble single chain nanoparticles (SCNPs). The studied SCNPs are based on polymers displaying lower-critical solution temperature (LCST) behavior...

Single-chain mechanics of poly(N-isopropyl-acrylamide) in the water/methanol mixed solvent

Polymer ◽  
2013 ◽  
Vol 54 (14) ◽  
pp. 3737-3743 ◽  
Author(s):  
Xiangchao Pang ◽  
Kefeng Wang ◽  
Shuxun Cui
Keyword(s):  
Mixed Solvent ◽  
Single Chain ◽  
Isopropyl Acrylamide

scholarly journals Poly(N-isopropyl acrylamide)–poly(ethylene glycol)–poly(N-isopropyl acrylamide) as a thermoreversible gelator for topical administration

2020 ◽  
Vol 1 (3) ◽  
pp. 371-386 ◽  
Author(s):  
P. Haddow ◽  
W. J. McAuley ◽  
S. B. Kirton ◽  
M. T. Cook
Keyword(s):  
Ethylene Glycol ◽  
Topical Administration ◽  
Poly Ethylene Glycol ◽  
Temperature Dependent ◽  
Isopropyl Acrylamide ◽  
Poly Ethylene

PNIPAM98–PEG122–PNIPAM98 is explored as a thermoreversible gelator for topical administration, giving temperature-dependent release of progesterone over up to 6 days.

Temperature-Dependent Self-Assembly and Mixing Behavior of Symmetrical Single-Chain Bolaamphiphiles

Langmuir ◽  
2008 ◽  
Vol 24 (12) ◽  
pp. 6238-6246 ◽  
Author(s):  
Annette Meister ◽  
Simon Drescher ◽  
Vasil M. Garamus ◽  
Göran Karlsson ◽  
Gesche Graf ◽  
...  
Keyword(s):  
Self Assembly ◽  
Single Chain ◽  
Temperature Dependent ◽  
Mixing Behavior

Temperature-dependent phagocytosis of highly branched poly(N-isopropyl acrylamide-co-1,2 propandiol-3-methacrylate)s prepared by RAFT polymerization

2007 ◽  
Vol 17 (38) ◽  
pp. 4022 ◽  
Author(s):  
Sally Hopkins ◽  
Steven Carter ◽  
Linda Swanson ◽  
Sheila MacNeil ◽  
Stephen Rimmer
Keyword(s):  
Raft Polymerization ◽  
Temperature Dependent ◽  
Isopropyl Acrylamide

Temperature dependent activity and structure of adsorbed proteins on plasma polymerizedN-isopropyl acrylamide

2006 ◽  
Vol 1 (1) ◽  
pp. 61-72 ◽  
Author(s):  
Xuanhong Cheng ◽  
Heather E. Canavan ◽  
Daniel J. Graham ◽  
David G. Castner ◽  
Buddy D. Ratner
Keyword(s):  
Temperature Dependent ◽  
Isopropyl Acrylamide ◽  
Dependent Activity ◽  
Adsorbed Proteins

(111) Monocrystalline Nickel Films

1972 ◽  
Vol 30 ◽  
pp. 512-513
Author(s):  
T.E. Pratt ◽  
R.W. Vook
Keyword(s):  
Film Thickness ◽  
Deposition Rate ◽  
Room Temperature ◽  
Narrow Range ◽  
High Vacuum ◽  
Residual Pressure ◽  
Temperature Dependent ◽  
Deposition Parameters ◽  
Transmission Electron ◽  
Substrate Temperatures

(111) oriented thin monocrystalline Ni films have been prepared by vacuum evaporation and examined by transmission electron microscopy and electron diffraction. In high vacuum, at room temperature, a layer of NaCl was first evaporated onto a freshly air-cleaved muscovite substrate clamped to a copper block with attached heater and thermocouple. Then, at various substrate temperatures, with other parameters held within a narrow range, Ni was evaporated from a tungsten filament. It had been shown previously that similar procedures would yield monocrystalline films of CU, Ag, and Au.For the films examined with respect to temperature dependent effects, typical deposition parameters were: Ni film thickness, 500-800 A; Ni deposition rate, 10 A/sec.; residual pressure, 10-6 torr; NaCl film thickness, 250 A; and NaCl deposition rate, 10 A/sec. Some additional evaporations involved higher deposition rates and lower film thicknesses.Monocrystalline films were obtained with substrate temperatures above 500° C. Below 450° C, the films were polycrystalline with a strong (111) preferred orientation.

Cryo-electron microscopy of two-dimensional crystals of reduced type B botulinum neurotoxin

1992 ◽  
Vol 50 (1) ◽  
pp. 530-531
Author(s):  
P. F. Flicker ◽  
V.S. Kulkarni ◽  
J. P. Robinson ◽  
G. Stubbs ◽  
B. R. DasGupta
Keyword(s):  
Disulfide Bonds ◽  
Clostridium Botulinum ◽  
Structural Changes ◽  
Two Dimensional ◽  
Type B ◽  
Single Chain ◽  
Muscle Paralysis ◽  
Cryo Electron Microscopy ◽  
Disulfide Linkages ◽  
Intracellular Action

Botulinum toxin is a potent neurotoxin produced by Clostridium botulinum. The toxin inhibits release of neurotransmitter, causing muscle paralysis. There are several serotypes, A to G, all of molecular weight about 150,000. The protein exists as a single chain or or as two chains, with two disulfide linkages. In a recent investigation on intracellular action of neurotoxins it was reported that type B neurotoxin can inhibit the release of Ca++-activated [3H] norepinephrine only if the disulfide bonds are reduced. In order to investigate possible structural changes in the toxin upon reduction of the disulfide bonds, we have prepared two-dimensional crystals of reduced type B neurotoxin. These two-dimensional crystals will be compared with those of the native (unreduced) type B toxin.

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