Results 51 to 60 of about 8,595 (212)

First Observations and Characteristics of Positive Upward Illumination Strokes

Geophysical Research Letters, Volume 53, Issue 1, 16 January 2026.
Abstract Upward Illumination (UI) strokes are a subtype of cloud‐to‐ground (CG) return strokes characterized by two concurrent branches striking the ground a few milliseconds apart. The luminous channel of an UI stroke does not connect to the main channel, which gives this phenomenon its name.
Antonio C. V. Saraiva, Paola B. Lauria, Marcelo M. F. Saba, Ivan T. Cruz, Tagianne P. da Silva, Diego R. R. da Silva, Rasha U. Abbasi, Ny Kieu, Listz S. Araujo, Miguel B. Guimarães, Jeff L. Lapierre   +10 more
wiley   +1 more source

Forecasts for Helium Reionization Detection with Fast Radio Bursts in the Era of Square Kilometre Array

The Astrophysical Journal
The observed dispersion measures (DMs) of fast radio bursts (FRBs) are a good indicator of the amount of ionized material along the propagation paths.
Jun-Jie Wei, Chong-Yu Gao
doaj   +1 more source

Effect of primordial black holes on the global 21 cm signal

Astronomy & Astrophysics
The 21 cm global signal, a treasure trove of information about the nature of the first luminous sources of the Universe, has traditionally been modelled assuming that these early sources were predominantly star-forming galaxies.
Chatterjee Atrideb
doaj   +1 more source

A Proteochemometric Model for Ligands of the SLC5 Transporter Family

Archiv der Pharmazie, Volume 359, Issue 1, January 2026.
A novel proteochemometric model was developed to predict the activity and selectivity of SLC5 family inhibitors. The model's performance was validated using 10‐fold cross‐validation on publicly available datasets achieving Q2 = 0.79 and MSE < 0.32. Detailed analysis of the results enabled the identification of a new, previously unrecognized selectivity‐
Martin Juhás, Gerhard Ecker
wiley   +1 more source

Constraints on the Thomson optical depth to the Cosmic Microwave Background from the Lyman-α forest

Physical Review Research
We present the first constraints on the electron optical depth to reionization, τ_{e}, from the Lyman-α forest alone for physically motivated reionization models that match the reionization's end point, z_{end}, required by the same astrophysical probe ...
Olga Garcia-Gallego, Vid Iršič, Martin G. Haehnelt, James S. Bolton   +3 more
doaj   +1 more source

Impact of the primordial black hole population on 21-cm observables at high redshift

Astronomy & Astrophysics
The 21-centimetre (21-cm) signal is one of the most promising probes of the high-redshift Universe. It has typically been modelled without accounting for the effects of active galactic nuclei (AGNs) in the pre-JWST era, primarily due to the lack of ...
Chatterjee Atrideb, Maity Barun, Koushiki   +2 more
doaj   +1 more source

Update and ADMET Profile of the Latin American Natural Product Database: LANaPDB

Molecular Informatics, Volume 44, Issue 11-12, November‐December 2025.
LANaPDB was updated with 1,164 nonduplicate new compounds coming from Argentina and Panama. Moreover, 41 ADMET (absorption, distribution, metabolism, excretion, and toxicity)‐related parameters were determined, and the results were compared with the Universal Natural Products Database and the approved small‐molecule drugs.
Alejandro Gómez‐García, Martin J. Lavecchia, Dionisio A. Olmedo, Pablo N. Solís, José L. Medina‐Franco   +4 more
wiley   +1 more source

Cutoff and Emergence of Dart Leaders in an Unbranched Positive Leader Simulation

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract Channel cutoff is the process by which an active lightning channel cools down, goes dark, and loses its ability to effectively conduct electricity. Current cutoff precedes several lightning phenomena, notably dart leaders and return strokes, but the process by which a hot, highly‐conducting leader channel can undergo current cutoff is poorly ...
J. G. Pantuso, C. L. da Silva, D. P. Jensen, M. Stock, J. Wemhoner, S. Heckman, B. M. Hare, A. F. R. Leal, R. G. Sonnenfeld, O. Scholten, X.‐M. Shao   +10 more
wiley   +1 more source

Signatures of Stellar Reionization of the Universe [PDF]

The Astrophysical Journal, 1997
The high ionization level and universal metallicity (1% solar) of the intergalactic gas at redshifts z<5 implies that nonlinear structure had started to form in the universe at earlier times than we currently probe. In Cold Dark Matter (CDM) cosmologies, the first generation of baryonic objects emerges at redshifts z=10-50.
Haiman, Zoltan, Loeb, Abraham
openaire   +4 more sources

Therapeutic Implications of Biomolecular Corona on Lipid Nanoparticle‐Based Gene Delivery Systems

Small Science, Volume 5, Issue 9, September 2025.
This image illustrates the role of the biomolecular corona in lipid nanoparticles (LNPs), highlighting its impact on the stability, immune response, biodistribution, and targeted delivery. Formed after injection, the corona influences how LNPs circulate, interact with the cells, and modulate the immune response.
Antonietta Greco, Claudia Corbo
wiley   +1 more source