Results 131 to 140 of about 3,997,963 (398)

Thermally Activated Processes in Polymer Glasses [PDF]

open access: yesarXiv, 2005
A derivation is given for the Vogel-Fulcher-Tammann thermal activation law for the glassy state of a bulk polymer. Our microscopic considerations involve the entropy of closed polymer molecular chains (i.e. polymer closed strings). For thin film polymer glasses, one obtains open polymer strings in that the boundary surfaces serve as possible string ...
arxiv  

New Design for Conserving Polymer Powder for the SIS Rapid Prototyping Process [PDF]

open access: yes, 2005
Selective Inhibition of Sintering (SIS) is a Rapid Prototyping process that makes parts in a layerbased method by using polymer powders. Current SIS machines accomplish this layer-based method by heating a fixed area of polymer powder.
Asiabanpour, Bahram   +4 more
core  

Effects of polymer polydispersity on the phase behaviour of colloid-polymer mixtures

open access: yes, 2005
We study the equilibrium behaviour of a mixture of monodisperse hard sphere colloids and polydisperse non-adsorbing polymers at their $\theta$-point, using the Asakura-Oosawa model treated within the free-volume approximation.
Aarts D G A L   +26 more
core   +1 more source

RhoA and Rac1 as Mechanotransduction Mediators in Colorectal Cancer

open access: yesAdvanced Biology, EarlyView.
Analysing RhoA and Rac1 protein levels in Colorectal cancer (CRC) samples under mechanical strain highlights their potential as diagnostic markers. Monitoring their activity could offer valuable insights into how cancer spreads, paving the way for new approaches to better understand and diagnose colorectal cancer.
Sharda Yadav   +5 more
wiley   +1 more source

A coarse grained model of polymer networks focusing on the intermediate length scales [PDF]

open access: yesarXiv, 2008
We propose a coarse-grained model for polymer chains and polymer networks based on the meso-scale dynamics. The model takes the internal degrees of freedom of the constituent polymer chains into account using memory functions and colored noises. We apply our model to dilute polymer solutions and polymer networks.
arxiv  

Free Energy Barrier for Electric Field Driven Polymer Entry into Nanoscale Channels

open access: yes, 2011
Free energy barrier for entry of a charged polymer into a nanoscale channel by a driving electric field is studied theoretically and using molecular dynamics simulations. Dependence of the barrier height on the polymer length, the driving field strength,
B. Hornblower   +2 more
core   +1 more source

Hydrophilic Polymers [PDF]

open access: yesPolymers, 2019
Hydrophilic polymers are a major area of polymer research with prominent fields of application, e [...]
openaire   +3 more sources

A highly stretchable, transparent, and conductive polymer

open access: yesScience Advances, 2017
A polymer is described that is conductive and stretchable, which can lead to electronics that can conform to the human body. Previous breakthroughs in stretchable electronics stem from strain engineering and nanocomposite approaches.
Yue Wang   +15 more
semanticscholar   +1 more source

Regulating Protein Immobilization During Cell‐Free Protein Synthesis in Hyaluronan Microgels

open access: yesAdvanced Biology, EarlyView.
Bifunctional microgels carrying a linear DNA template and Ni2+‐activated NTA moieties are used as platform for cell‐free protein synthesis and in situ protein immobilization. By varying the concentration of NTA moieties in the microgels, the amount of GFP‐His immobilized inside the microgel and released to the microgel environment can be regulated ...
Anika Kaufmann   +2 more
wiley   +1 more source

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