Chemical combinatorics. Part 3.—Stereochemical invariance law and the statistical mechanics of flexible molecules

Author(s):  
M. Gordon ◽  
W. B. Temple
CrystEngComm ◽  
2014 ◽  
Vol 16 (27) ◽  
pp. 6224-6233 ◽  
Author(s):  
Adam Idu Jion ◽  
Raj Rajagopalan

Mathematical ‘strings’ can be used with computer simulations and statistical mechanics to calculate the fraction of growth units and activation energies of flexible molecules present at the crystal–solution interface.


Author(s):  
K. A. Fisher ◽  
M. G. L. Gustafsson ◽  
M. B. Shattuck ◽  
J. Clarke

The atomic force microscope (AFM) is capable of imaging electrically conductive and non-conductive surfaces at atomic resolution. When used to image biological samples, however, lateral resolution is often limited to nanometer levels, due primarily to AFM tip/sample interactions. Several approaches to immobilize and stabilize soft or flexible molecules for AFM have been examined, notably, tethering coating, and freezing. Although each approach has its advantages and disadvantages, rapid freezing techniques have the special advantage of avoiding chemical perturbation, and minimizing physical disruption of the sample. Scanning with an AFM at cryogenic temperatures has the potential to image frozen biomolecules at high resolution. We have constructed a force microscope capable of operating immersed in liquid n-pentane and have tested its performance at room temperature with carbon and metal-coated samples, and at 143° K with uncoated ferritin and purple membrane (PM).


1992 ◽  
Vol 2 (5) ◽  
pp. 1215-1236 ◽  
Author(s):  
Jonathan V. Selinger ◽  
Robijn F. Bruinsma

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