Results 121 to 130 of about 967,800 (166)

Heat conduction in polymer chains with controlled end-to-end distance

The Journal of Chemical Physics, 2020
The low thermal conductance of polymers is one of the major drawbacks for many polymer-based products. However, a single polymer chain when stretched can have high thermal conductivities. We use non-equilibrium molecular dynamics simulations to study the steady-state thermal conductance along finite macromolecules under mechanical control of the end-to-
Mohammadhasan Dinpajooh, Abraham Nitzan
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Endpoint Cluster Identification for End-to-End Distance Estimation

2006 IEEE International Conference on Communications, 2006
Distributed systems such as peer-to-peer networks and distributed servers can optimize their performance by adapting to the underlying network. End-to-end measurements are an important basis for such adaptivity. Although most applications measure similar properties of the network, the measurements are mostly done in application-specific ways.
Matthias Scheidegger, Torsten Braun, Florian Baumgartner   +2 more
openaire   +1 more source

Determination of End-to-End Distances in Oligomers by Pulsed EPR

The Journal of Physical Chemistry, 1996
Conformations of end-labeled alkanes in a rigid polymer matrix were investigated using the pulsed double electron-electron resonance (DEER) method. To this end, dipolar spectra of a series of aliphatic dicarbonic acids with 8−20 methylene units and chain ends bifunctionalized with nitroxide radicals were recorded in a polystyrene matrix. The biradicals
Pfannebecker, V., Klos, H., Hubrich, M., Volkmer, T., Heuer, A., Wiesner, U., Spiess, H.   +6 more
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Estimating topological distances based on end-to-end path sharing

2009 IEEE Sarnoff Symposium, 2009
Quality of Service (QoS) of large-scale distributed systems depends on the properties of the network connecting the nodes/hosts of the system. Topological information about the underlying network is beneficial for improving the performance, devising reliability schemes, ensuring low overhead, and enhancing the scalability of such systems.
Bengi Karacali, Mark Karol
openaire   +1 more source

Persistence Length, End-to-End Distance, and Structure of Coarse-Grained Polymers

Journal of Chemical Theory and Computation, 2018
Coarse-grained (CG) polymer simulations can access longer times and larger lengths than all-atom (AA) molecular dynamics simulations; however, not all CG models correctly reproduce polymer properties on all length scales. Here we coarse-grain atomistic position data from polyethylene (PE) and polytetrafluoroethylene (PTFE) melt simulations by combining
K. Michael Salerno, Noam Bernstein
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Mean end-to-end distance of branched polymers

Journal of Physics A: Mathematical and General, 1979
The author uses Monte Carlo methods to calculate the mean end-to-end distance of randomly branched polymer molecules. Molecular realisations are brown on the square and simple cubic lattices, and consist of N bifunctional monomers and Nf polyfunctional branching units of functionality f.
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Direct Measurement of the End‐to‐End Distance of Individual Polyfluorene Polymer Chains

ChemPhysChem, 2005
AbstractWide‐field imaging of individual multichromophoric molecules and successive photobleaching were used to determine, accurately, the relative position of the chromophores in such systems. First, a polyphenylene dendrimer with well‐defined geometry was used to establish the accuracy in localization that can be obtained by this methodology.
Muls, B., Uji-i, H., Melnikov, S., Moussa, A., Verheijen, W., Soumillion, J., Jacob, J., Müllen, K., Hofkens, J.   +8 more
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Unperturbed Mean-Square End-to-End Distance of Polyethylene

The Journal of Chemical Physics, 1961
It is shown that previous methods for calculating the mean-square end-to-end distance 〈r02〉 of polyethylene are invalid, since no account is taken of interactions between rotations around chain bonds. With the aid of recently developed matrix methods the value of 〈r02〉/nl2 is calculated to be 6.75 at 160°C in excellent agreement with the results ...
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End-to-end distance distribution in bradykinin observed by Förster resonance energy transfer

Biochimica et Biophysica Acta (BBA) - General Subjects, 2000
Förster resonance energy transfer (FRET) was used to study the conformational dynamics of bradykinin related peptides. The fluorescent probe aminobenzoic acid (Abz) bound to the amino terminal of bradykinin maintained its fluorescence characteristics, like high quantum yield and excited state decay dominated by a lifetime of 8.3 ns.
Souza, E. S. de, Hirata, I. Y., Juliano, L., Ito, A. S.   +3 more
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The distribution of end-to-end distances of the weakly bending rod model

Biopolymers, 2000
The weakly bending rod model is an approximation to a worm-like chain in the limit where the ratio L(0)/P of the contour length L(0) to the persistence length P is not too large. The range of validity of the weakly bending rod model is investigated by deriving analytical expressions for its distribution of end-to-end distances P(L) and its moments and
J M, Schurr, B S, Fujimoto
openaire   +2 more sources