The competition between chain entropy and bending rigidity in compact polymers can be addressed within a lattice model introduced by Flory in 1956 [Proc. R. Soc. London A 234, 60 (1956)]]. It exhibits a transition between an entropy dominated disordered phase and an energetically favored crystalline phase. The nature of this order-disorder transition has been debated ever since the introduction...

The Flory-Huggins theory of flexible polymers mixtures @P. J. Flory, Principles of Polymer Chemistry ~Cornell University Press, Ithaca, 1953!# and the Lebwohl-Lasher model of nematogens @G. Lasher, Phys. Rev. A 5, 1350 ~1972!; P. A. Lebwohl and G. Lasher, ibid. 6, 426 ~1972!# are combined to understand the phase behaviors of mixtures of flexible polymers ~coils! and small molecular liquid cryst...

Background AFD is an X linked disorder of lysosomal storage that can have various cardiac manifestations, most commonly resulting in LVH. Echocardiographic data on LVH distribution emphasised concentric hypertrophy in males and later onset in females with less hypertrophy. However this modality is often limited in visualisation of the left ventricular apex. Methods 27 patients (mean age 47, 33%...

Concentrated solutions of low-molecular-weight DNA (Mw=35000) with a known molecular-weight distribution can be prepared in several hours, and require no additional fractionation procedures. This is achieved by sonication of the DNA in 1.0 M-NaCl at high power at 0--2 degrees C. No denaturation of the DNA is detectable, even after 8h of continuous sonication. After 2h, the molecular-weight dist...

Abstract A new compound Lomax model is proposed and analyzed. The novel distribution derived based on compounding the zero truncated Poisson exponentiated exponential distribution. density can be “monotonically left skewed,” right skewed” “symmetric” with various useful shapes. hazard rate “upside down bathtub-increasing,” “bathtub ( U -shape),” decreasing,” “increasing-constant” increasing.” R...

The contribution of neutral polymer brush to the curvature elasticity of the grafting surface is investigated theoretically. Using self-consistent field theory, we accurately evaluate the dependence of bending modulus on parameters including chain length, Flory-Huggins parameter and grafting density and reveal the importance of solvent. The results show that the brush-induced bending modulus fo...