Ara
Toplam kayıt 129, listelenen: 31-40
Testing a hypothesis for the evolution of sex
(World Scientific Publishing Company, 2000-07-11)
An asexual set of primitive bacteria is simulated with a lit-string Penna model with a Fermi function for survival. A recent hypothesis by Jan, Stauffer, and Moseley on the evolution of sex from asexual cells as a strategy ...
Signals of chaotic behavior in PMMA
(Pergamon-Elsevier Science, 2003-07)
The time evolution of the current passing through PMMA polymer thin films under 10 V at 23degreesC (296 K) was sampled at intervals ranging from 1 to 20 s. The data showed chaotic behavior in the context of pinned charge ...
Monitoring small molecule diffusion into hydrogels at various temperatures by fluorescence technique
(Elsevier B.V., 2006-12-01)
steady state fluorescence technique was used to study small molecule diffusion into polyacrylamide (PAAm) gels at various temperatures. Pyranine (P-y), dissolved in water was introduced as a probe and fluorescence emission ...
Theory of fluidity of liquids, glass transition, and melting
(Elsevier B.V., 2006-03-01)
This is a presentation of a rigorous theory of fluidity of liquids, glass transition and melting of solids in the frame of an asymmetric double well potential model. Potential wells are doubled time to time by the local ...
Poly (styrene) latex/modified na-activated bentonite nanocomposite films: a fluorescence study
(Elsevier Science BV, 2008-12)
We studied film formation of composites of surfactant-free polystyrene (PS) nanoparticles and modified Na-activated bentonite (MLB), by steady state fluorescence (SSF) technique. The films were prepared from a mixture of ...
Synthesis and liquid crystalline behavior of random copolymer of poly(ethylene oxide) macromonomer and liquid crystalline monomer by the photon transmission technique
(Taylor & Francis Inc, 2005-12)
Random copolymers of poly(ethylene oxide) macromonomer with p-vinylbenzyl end-functional group (PEOVB) and liquid crystalline monomer, namely 6-(4-cyanobiphenyl-4'-oxy)hexyl acrylate (COA), were prepared by conventional ...
Reordering of polystyrene gel due to multiple swelling in organic vapor fast transient fluorescence technique study
(Elsevier Science SA, 2006-07-31)
Reordering of disc-shaped polystyrene (PS) gels due to multiple swelling, under organic vapor was studied by using Fast Transient Fluorescence (FTRF) technique. Disc-sbaped polystyrene gels were prepared by free radical ...
The liquid–glass transition – is it a fourth order phase transition?
(Elsevier Science, 2005-09-01)
The liquid-glass transition is analyzed using a theory of Brownian motion in liquids recently developed by the author. It is shown that if a liquid could be cooled in quasi-static process and still avoids crystallization ...
Slow release from carrageenan gels at various temperatures
(Prous Science, SA, 2007-07)
[No abstract available]
Film formation from nano-sized polystyrene latex particles
(John Wiley & Sons Ltd, 2005-05)
This work reports on the steady state fluorescence (SSF) technique for studying film formation from surfactant-free, nano-sized polystyrene (PS) latex particles prepared via emulsion polymerization. The latex films were ...