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Polymers in Physics, Chemistry and Biology: Behavior of Linear Polymers in Fractal Structures.
Polymers (Basel)
December 2024
Department of Physics, University of Milano-Bicocca, Piazza della Scienza 3, 20126 Milano, Italy.
We start presenting an overview on recent applications of linear polymers and networks in condensed matter physics, chemistry and biology by briefly discussing selected papers (published within 2022-2024) in some detail. They are organized into three main subsections: polymers in physics (further subdivided into simulations of coarse-grained models and structural properties of materials), chemistry (quantum mechanical calculations, environmental issues and rheological properties of viscoelastic composites) and biology (macromolecules, proteins and biomedical applications). The core of the work is devoted to a review of theoretical aspects of linear polymers, with emphasis on self-avoiding walk (SAW) chains, in regular lattices and in both deterministic and random fractal structures.
View Article and Find Full Text PDFUltra-weak photon emission from DNA.
Sci Rep
November 2024
Faculty of Natural Sciences, Institute of Biology, Biotechnology, and Environmental Protection, University of Silesia, Katowice, 40-032, Poland.
It is conventionally believed that macromolecules found in living cells, including DNA, RNA, and proteins, do not exhibit inherent light emission. However, recent studies have challenged this concept by demonstrating spontaneous light emission from nucleic acids under certain conditions and physiological temperatures. By noninvasive monitoring of barley genomic DNA and advanced statistical physics analyses, temperature-induced dynamic entropy fluctuations and fractal dimension oscillations were identified at a key organizational threshold.
View Article and Find Full Text PDFFractional Chern Insulators in Twisted Bilayer MoTe_{2}: A Composite Fermion Perspective.
Phys Rev Lett
November 2024
Department of Physics, Emory University, 400 Dowman Drive, Atlanta, Georgia 30322, USA.
The discovery of fractional Chern insulators (FCIs) in twisted bilayer MoTe_{2} has sparked significant interest in fractional topological matter without external magnetic fields. Unlike the flat dispersion of Landau levels, moiré electronic states are influenced by lattice effects within a nanometer-scale superlattice. This Letter examines the impact of these lattice effects on the topological phases in twisted bilayer MoTe_{2}, uncovering a family of FCIs with Abelian anyonic quasiparticles.
View Article and Find Full Text PDFEvaluating and Comparing Measures of Aperiodic Neural Activity.
bioRxiv
September 2024
Department of Cognitive Science, University of California, San Diego.
Neuro-electrophysiological recordings contain prominent aperiodic activity - meaning irregular activity, with no characteristic frequency - which has variously been referred to as 1/f (or 1/f-like activity), fractal, or 'scale-free' activity. Previous work has established that aperiodic features of neural activity is dynamic and variable, relating (between subjects) to healthy aging and to clinical diagnoses, and also (within subjects) tracking conscious states and behavioral performance. There are, however, a wide variety of conceptual frameworks and associated methods for the analyses and interpretation of aperiodic activity - for example, time domain measures such as the autocorrelation, fractal measures, and/or various complexity and entropy measures, as well as measures of the aperiodic exponent in the frequency domain.
View Article and Find Full Text PDFIntegrative biology for integrative medicine: A complete approach.
J Ayurveda Integr Med
November 2023
MIT World Peace University, Pune, India.
Background: India's AYUSH systems of medicine, Ayurveda, Yoga and Naturopathy, Unani, Siddha and Sowa-Rigpa, and Homeopathy, use natural self-healing abilities of body and mind. Their ways to treat non-communicable diseases reduce use of modern drugs with their side-effects. Scientific acceptance requires them to be explained from a modern biological perspective.
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