Radius of gyration of stiff chain molecules as a function of the chain length and the interactions with the solvent

1970 ◽  
Vol 49 ◽  
pp. 51 ◽  
Author(s):  
R. G. Kirste
Keyword(s):  
Chain Length ◽  
Radius Of Gyration ◽  
Chain Molecules ◽  
Stiff Chain

THE "FOLDING" BEHAVIORS OF HOMOPOLYMERS WITH ONE END FIXED

2004 ◽  
Vol 18 (15) ◽  
pp. 2123-2139 ◽  
Author(s):  
BIN XUE ◽  
JUN WANG ◽  
WEI WANG
Keyword(s):  
Molecular Dynamics ◽  
Chain Length ◽  
Conformational Changes ◽  
Canonical Ensemble ◽  
Interaction Strength ◽  
Simulation Method ◽  
Dynamics Simulation ◽  
Radius Of Gyration ◽  
Native Conformation ◽  
Collapse Temperature

We study the "folding" behaviors of homopolymers with one end fixed. By using canonical ensemble molecular dynamics simulation method, we observe the conformational changes during folding processes. Long chains collapse to the helical nuclei, then regroup to helix from the free-end to form the compact conformations through the middle stages of helix-like coil and helix-like cone, while short chains do not apparently have the above mentioned middle stages. Through simulated annealing, the native conformation of homopolymer chain in our model is found to be helix. We show the relations between specific heat C v (T) and radius of gyration R g (T) as functions of temperature, chain length and the interaction strength, respectively. We find that these two quantities match well and can be combined to interpret the "folding" process of the homopolymer. It is found that the collapse temperature Tθ and the native-like folding temperature T f do not change with the chain length in our model, however the interaction strength affects the values of Tθ and T f .

Equilibrium and dynamical properties of gaussian stiff chain molecules

1994 ◽  
Vol 81 (1) ◽  
pp. 91-99 ◽  
Author(s):  
Roland G. Winkler ◽  
Ludger Harnau ◽  
Peter Reineker
Keyword(s):  
Chain Molecules ◽  
Dynamical Properties ◽  
Stiff Chain

Light Scattering by very Stiff Chain Molecules

Nature ◽  
1953 ◽  
Vol 171 (4345) ◽  
pp. 259-260 ◽  
Author(s):  
A. PETERLIN
Keyword(s):  
Light Scattering ◽  
Chain Molecules ◽  
Stiff Chain
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