Results 61 to 70 of about 3,847,981 (341)

Microbes contribute to setting the ocean carbon flux by altering the fate of sinking particulates

Nature Communications, 2022
Sinking particulate organic carbon out of the surface ocean sequesters carbon on decadal to millennial timescales. Predicting the particulate carbon flux is therefore critical for understanding both global carbon cycling and the future climate.
Trang T H Nguyen, E. Zakem, A. Ebrahimi, Julia A. Schwartzman, Tolga Çaglar, K. Amarnath, Uria Alcolombri, François J. Peaudecerf, T. Hwa, R. Stocker, O. Cordero, N. Levine   +11 more
semanticscholar   +1 more source

The role of histone modifications in transcription regulation upon DNA damage

FEBS Letters, EarlyView.
This review discusses the critical role of histone modifications in regulating gene expression during the DNA damage response (DDR). By modulating chromatin structure and recruiting repair factors, these post‐translational modifications fine‐tune transcriptional programmes to maintain genomic stability.
Angelina Job Kolady, Siyao Wang
wiley   +1 more source

Generalized model of blockage in particulate flow limited by channel carrying capacity

, 2015
We investigate stochastic models of particles entering a channel with a random time distribution. When the number of particles present in the channel exceeds a critical value $N$, a blockage occurs and the particle flux is definitively interrupted.
Angelani, L., Barre, C., Gabrielli, A., Talbot, J., Viot, P.   +4 more
core   +1 more source

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

Inducing the Effect of a Ga₂O₃ Nano-Particle on the CsF-RbF-AlF₃ Flux for Brazing Aluminum to Carbon Steels

Crystals, 2020
In this study, a Ga2O3 nano-particle was added into CsF-RbF-AlF3 flux to develop a highly active flux for brazing aluminum alloy to steel, and the spreadability and wettability of Zn-Al filler metal that matched the CsF-RbF-AlF3 flux-doped Ga2O3 nano ...
Zhen Yao, Songbai Xue, Jinlong Yang, Junxiong Zhang   +3 more
doaj   +1 more source

Trapped and Leaking Energetic Particles in Injection Flux Tubes of Saturn's Magnetosphere

Geophysical Research Letters, 2023
In Saturn's magnetosphere, the radially‐inward transport of magnetic fluxes is usually carried by localized flux tubes with sharply‐enhanced equatorial magnetic fields.
Ze‐Fan Yin, Yi‐Xin Sun, Xu‐Zhi Zhou, Dong‐Xiao Pan, Zhong‐Hua Yao, Chao Yue, Ze‐Jun Hu, Elias Roussos, Michel Blanc, Hai‐Rong Lai, Qiu‐Gang Zong   +10 more
doaj   +1 more source

Spin of the ground state and the flux phase problem on the ring

, 2004
As a continuation of our previous work, we derive the optimal flux phase which minimizes the ground state energy in the one-dimensional many particle systems, when the number of particles is odd in the absence of on-site interaction and external ...
Fumihiko Nakano, Kusmartsev F V, Lieb E H, Lieb E H, Nakano F, Yu F   +5 more
core   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Galactic cosmic rays on extrasolar Earth-like planets I. Cosmic ray flux

, 2015
(abridged abstract) Theoretical arguments indicate that close-in terrestial exoplanets may have weak magnetic fields, especially in the case of planets more massive than Earth (super-Earths).
Atri, D., Grenfell, J. L., Grießmeier, J. -M., Stadelmann, A., Tabataba-Vakili, F.   +4 more
core   +6 more sources

Microbial dynamics of elevated carbon flux in the open ocean’s abyss

Proceedings of the National Academy of Sciences of the United States of America, 2021
Significance The ocean’s “biological pump” exports sinking particles containing carbon, nutrients, and energy to the deep sea, contributing centrally to the global carbon cycle.
Kirsten E. Poff, Andy O Leu, J. Eppley, D. Karl, E. Delong   +4 more
semanticscholar   +1 more source