Miscible polyisoprene/polybutadiene blends: Relationship between average statistical segment length and vinyl content

2008 ◽  
Vol 109 (3) ◽  
pp. 2029-2042
Author(s):  
Michael R. Ambler

2018 ◽  
Vol 140 (2) ◽  
Author(s):  
Kevin D. Dorfman

The development of bright bisintercalating dyes for deoxyribonucleic acid (DNA) in the 1990s, most notably YOYO-1, revolutionized the field of polymer physics in the ensuing years. These dyes, in conjunction with modern molecular biology techniques, permit the facile observation of polymer dynamics via fluorescence microscopy and thus direct tests of different theories of polymer dynamics. At the same time, they have played a key role in advancing an emerging next-generation method known as genome mapping in nanochannels. The effect of intercalation on the bending energy of DNA as embodied by a change in its statistical segment length (or, alternatively, its persistence length) has been the subject of significant controversy. The precise value of the statistical segment length is critical for the proper interpretation of polymer physics experiments and controls the phenomena underlying the aforementioned genomics technology. In this perspective, we briefly review the model of DNA as a wormlike chain and a trio of methods (light scattering, optical or magnetic tweezers, and atomic force microscopy (AFM)) that have been used to determine the statistical segment length of DNA. We then outline the disagreement in the literature over the role of bisintercalation on the bending energy of DNA, and how a multiscale biomechanical approach could provide an important model for this scientifically and technologically relevant problem.



1992 ◽  
Vol 25 (20) ◽  
pp. 5547-5550 ◽  
Author(s):  
Frank S. Bates ◽  
Mark F. Schulz ◽  
Jeffrey H. Rosedale ◽  
Kristoffer Almdal


1995 ◽  
Vol 273 (7) ◽  
pp. 626-632 ◽  
Author(s):  
A. Dondos ◽  
G. Staikos




Polymer ◽  
1998 ◽  
Vol 39 (17) ◽  
pp. 4155-4158 ◽  
Author(s):  
C. Gans ◽  
J. Schnee ◽  
U. Scherf ◽  
G. Staikos ◽  
E. Pierri ◽  
...  


1993 ◽  
Vol 26 (20) ◽  
pp. 5457-5460 ◽  
Author(s):  
J. K. Kallitsis ◽  
K. Gravalos ◽  
A. Dondos


2020 ◽  
Author(s):  
Ibrar Ul Hassan Akhtar

UNSTRUCTURED Current research is an attempt to understand the CoVID-19 pandemic curve through statistical approach of probability density function with associated skewness and kurtosis measures, change point detection and polynomial fitting to estimate infected population along with 30 days projection. The pandemic curve has been explored for above average affected countries, six regions and global scale during 64 days of 22nd January to 24th March, 2020. The global cases infection as well as recovery rate curves remained in the ranged of 0 ‒ 9.89 and 0 ‒ 8.89%, respectively. The confirmed cases probability density curve is high positive skewed and leptokurtic with mean global infected daily population of 6620. The recovered cases showed bimodal positive skewed curve of leptokurtic type with daily recovery of 1708. The change point detection helped to understand the CoVID-19 curve in term of sudden change in term of mean or mean with variance. This pointed out disease curve is consist of three phases and last segment that varies in term of day lengths. The mean with variance based change detection is better in differentiating phases and associated segment length as compared to mean. Global infected population might rise in the range of 0.750 to 4.680 million by 24th April 2020, depending upon the pandemic curve progress beyond 24th March, 2020. Expected most affected countries will be USA, Italy, China, Spain, Germany, France, Switzerland, Iran and UK with at least infected population of over 0.100 million. Infected population polynomial projection errors remained in the range of -78.8 to 49.0%.



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