The origin of SARS-CoV-2 has evoked heated debate and strong accusations, yet seemingly little resolution. I review the scientific evidence on the origin of SARS-CoV-2 and its subsequent spread through the human population. The available data clearly point to a natural zoonotic emergence within, or closely linked to, the Huanan Seafood Wholesale Ma...
Published in Plasma Physics and Controlled Fusion
Research shows that there is an asynchronous evolution process between the internal transport barriers (ITBs) formed in three channels (ion temperature, electron temperature, and density). Under the condition of a low toroidal magnetic field ( Bt ∼ 1.6 T), the electron density ITB is the easiest to implement through the fueling effect of the first ...
Dans la première partie de l’article, l’autrice rectifie la compréhension traditionnelle du terme « médiateur » appliqué à la sphère littéraire et au processus littéraire, et, sur la base d’une nouvelle définition, distingue plusieurs niveaux de médiation dans le domaine littéraire. Elle propose un paradigme complet des rôles médiateurs des femmes ...
RNA viruses have evolved sophisticated strategies to exploit the limited encoded information within their typically compact genomes. One of them, named transcriptional slippage (TS), is characterized by the appearance of indels in nascent viral RNAs, leading to changes in the open reading frame (ORF). Although members of unrelated viral families ex...
Published in Annual Review of Astronomy and Astrophysics
Galactic winds shape the stellar, gas, and metal content of galaxies. To quantify their impact, we must understand their physics. We review potential wind-driving mechanisms and observed wind properties, with a focus on the warm ionized and hot X-ray-emitting gas. Energy and momentum injection by supernovae (SNe), cosmic rays, radiation pressure, a...
Published in Frontiers in Plant Science
Inbreeding depression, the reduced fitness of inbred relative to outbred individuals was described more than two centuries ago, long before the development of population genetics. Its impact is central to evolutionary ecology and the evolution of mating systems, in particular self-fertilization in hermaphrodites. In the first half of the 20th centu...
Published in Journal of Physics A: Mathematical and Theoretical
We give a detailed canonical analysis of the n-dimensional f(Riemann) gravity, correcting the earlier results in the literature. We also write the field equations in the Fischer–Marsden form which is amenable to identifying the non-stationary energy on a spacelike hypersurface. We give pure R2 and RμνRμν theories as examples.
Published in Frontiers in Plant Science
Introduction Stephania longa, a medicinal plant renowned for producing cepharanthine, has gained significance due to the compound's notable antiviral properties against SARS-CoV-2. However, a comprehensive genetic understanding of S. longa has been lacking. This study aimed to develop a high-quality, chromosome-level genome assembly to uncover the ...
Published in Molecular biology and evolution
Protein space is characterized by extensive recurrence, or "reuse," of parts, suggesting that new proteins and domains can evolve by mixing-and-matching of existing segments. From an evolutionary perspective, for a given combination to persist, the protein segments should presumably not only match geometrically but also dynamically communicate with...
Published in Molecular biology and evolution
Pleiotropy, the phenomenon in which a single gene influences multiple traits, is a fundamental concept in genetics. However, the evolutionary mechanisms underlying pleiotropy require further investigation. In this study, we conducted parallel gene knockouts targeting 100 transcription factors in 2 strains of Saccharomyces cerevisiae. We systematica...
