Characterization of polyvinyl chloride part II. The unperturbed end to end distance values obtained from a new GPC method and viscometry

1971 ◽  
Vol 11 (3) ◽  
pp. 187-193 ◽  
Author(s):  
Richard K. S. Chan
Keyword(s):  
Polyvinyl Chloride ◽  
End Distance ◽  
End To End

scholarly journals A bisazobenzene crosslinker that isomerizes with visible light

2012 ◽  
Vol 8 ◽  
pp. 2184-2190 ◽  
Author(s):  
Subhas Samanta ◽  
Harris I Qureshi ◽  
G Andrew Woolley
Keyword(s):  
Visible Light ◽  
Thermal Relaxation ◽  
Bright Light ◽  
Large Change ◽  
Light Sources ◽  
Functional Changes ◽  
End Distance ◽  
End To End ◽  
Azobenzene Derivatives

Background: Large conformational and functional changes of azobenzene-modified biomolecules require longer azobenzene derivatives that undergo large end-to-end distance changes upon photoisomerization. In addition, isomerization that occurs with visible rather than UV irradiation is preferred for biological applications. Results: We report the synthesis and characterization of a new crosslinker in which a central piperazine unit links two azobenzene chromophores. Molecular modeling indicates that this crosslinker can undergo a large change in end-to-end distance upon trans,trans to cis,cis isomerization. Photochemical characterization indicates that it does isomerize with visible light (violet to blue wavelengths). However, the thermal relaxation rate of this crosslinker is rather high (τ½ ~ 1 s in aqueous buffer at neutral pH) so that it is difficult to produce large fractions of the cis,cis-species without very bright light sources. Conclusion: While cis-lifetimes may be longer when the crosslinker is attached to a biomolecule, it appears the para-piperazine unit may be best suited for applications where rapid thermal relaxation is required.

Self‐avoiding walks with span limitations. I. The mean square end‐to‐end distance

1980 ◽  
Vol 72 (4) ◽  
pp. 2702-2707 ◽  
Author(s):  
Ronnie Barr ◽  
Chava Brender ◽  
Melvin Lax
Keyword(s):  
Mean Square ◽  
End Distance ◽  
The Mean ◽  
End To End ◽  
Self Avoiding Walks

Isolation and molecular characterization of polyvinyl chloride (PVC) plastic degrading fungal isolates

2013 ◽  
Vol 54 (1) ◽  
pp. 18-27 ◽  
Author(s):  
Muhammad Ishtiaq Ali ◽  
Safia Ahmed ◽  
Geoff Robson ◽  
Imran Javed ◽  
Naeem Ali ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Polyvinyl Chloride ◽  
Fungal Isolates
Sign in / Sign up

Export Citation Format

Share Document