Results 131 to 140 of about 1,344 (291)

Prediction and Observation of a Stellar Occultation by Haumea’s Satellite Namaka

Research Notes of the AAS
Abstract Stellar occultations are an ideal way to characterize the physical and orbital properties of trans-Neptunian binary systems. In this research note, we detail the prediction and observation of a stellar occultation observed with NASA’s Infrared Telescope Facility on 2025 March 16th (UT), with drop-outs from both the dwarf planet ...
Flavia L. Rommel, Benjamin C. N. Proudfoot, Bryan J. Holler, Jose L. Ortiz, Estela Fernández-Valenzuela   +4 more
openaire   +2 more sources

Streptavidins Coordinate Biotin Sequestration and Self‐Resistance Within a Biotin‐Pathway Antibiotic Network

Advanced Science, EarlyView.
A conserved genomic region between two streptavidin genes in Streptomyces packages biosynthetic gene clusters for diverse biotin‐pathway antibiotics: acidomycin, stravidin, the new non‐proteinogenic amino acid ANDA, and the new BioA inhibitor α‐methyl‐KAPA.
Sumire Kurosawa, Jingjun Mo, Xiaotong Diao, Feng Xie, Tingting Wang, Haowen Zhao, Dalei Wu, Rolf Müller, Chengzhang Fu   +8 more
wiley   +1 more source

Cassini Uvis Stellar Occultation Observations of Saturn\u27s Rings

, 2010
The Cassini spacecraft\u27s Ultraviolet Imaging Spectrograph (UVIS) includes a high-speed photometer (HSP) that has observed more than 100 stellar occultations by Saturn\u27s rings.
J. E. Colwell, R. G. Jerousek, D. Pettis, Esposito, L. W., Bradley, E. T., L. W. Esposito, M. Sremčević, Pettis, D., E. T. Bradley, Colwell, J. E., Sremčević, M., Jerousek, R. G.   +11 more
core   +1 more source

No thick carbon dioxide atmosphere on the rocky exoplanet TRAPPIST-1 c. [PDF]

Nature, 2023
Zieba S, Kreidberg L, Ducrot E, Gillon M, Morley C, Schaefer L, Tamburo P, Koll DDB, Lyu X, Acuña L, Agol E, Iyer AR, Hu R, Lincowski AP, Meadows VS, Selsis F, Bolmont E, Mandell AM, Suissa G.   +18 more
europepmc   +1 more source

Multimodal Imaging Reveals Rapid Catecholamine Uptake and Release by Neutrophils

Advanced Science, EarlyView.
We show that immune cells (neutrophils) synthesize, uptake, and store catecholamine neurotransmitters such as dopamine or adrenaline. They also release them in response to specific stimuli (serotonin), which we directly visualize using fluorescent nanosensors. We further demonstrate that catecholamines affect neutrophil functions (NETosis) and platelet
Jennifer Mohr, Anne Schmitz, Meshkat Dinarvand, Franziska Wulfert, Sangeetha Shankar, Bjoern F. Hill, Michael Wojak, Juliana Gretz, Marie Britz, Elsa Neubert, Magdalena Shumanska, Sofia Kaushik, Linda Kartaschew, Ivan Bogeski, James Daniel, Sebastian Jung, Johannes Eble, Guido Wabnitz, Luise Erpenbeck, Sebastian Kruss   +19 more
wiley   +1 more source

Juno's Close Encounter With Ganymede-An Overview. [PDF]

Geophys Res Lett, 2022
Hansen CJ, Bolton S, Sulaiman AH, Duling S, Bagenal F, Brennan M, Connerney J, Clark G, Lunine J, Levin S, Kurth W, Mura A, Paranicas C, Tosi F, Withers P.   +14 more
europepmc   +1 more source

Reinnervation of Muscle Targets Enhances the Separability of Motor Unit Signals Following Peripheral Nerve Transfers

Advanced Science, EarlyView.
Injured or cut peripheral nerves can be surgically rerouted to reinnervate new muscle targets. This study demonstrates reinnervated muscles exhibit enhanced separability between individual motor unit signals, which can simplify signal recording and decomposition. These findings highlight the potential of reinnervated muscle to serve as a key biological
Kiara N Quinn, Siyu Wang, Lang Qin, Alessandro Ascani Orsini, Kenzi Griffith, Rachana Suresh, Fausto Kang, Pierce L Perkins, Neha Joshi, Alexis L Lowe, Sami Tuffaha, Nitish V Thakor   +11 more
wiley   +1 more source

Constraints on Quaoar’s Rings and Atmosphere from JWST/NIRCam Observations of a Stellar Occultation

The Planetary Science Journal
Observations of stellar occultations have revealed that small bodies are capable of hosting ring systems. The trans-Neptunian object Quaoar is the host of an enigmatic ring system, with two rings located well outside the Roche limit. To better understand
Benjamin Proudfoot, Bryan J. Holler, Ko Arimatsu, Flavia L. Rommel, Cameron Collyer, Estela Fernández-Valenzuela   +5 more
doaj   +1 more source

An exomoon survey of 70 cool giant exoplanets and the new candidate Kepler-1708 b-i. [PDF]

Nat Astron, 2022
Kipping D, Bryson S, Burke C, Christiansen J, Hardegree-Ullman K, Quarles B, Hansen B, Szulágyi J, Teachey A.   +8 more
europepmc   +1 more source

Dynamic Self‐Clickable Decellularized Matrix Hydrogels for Regulating Vascularity and Enhancing Muscle Regeneration

Advanced Science, EarlyView.
Dynamic decellularized hydrogels are prepared using bovine decellularized small intestine submucosa (SIS) norbornene (dSIS‐NB). Bovine dSIS contained significant amounts of disulfide‐rich fibrillin‐I, enabling ‘self‐clickable’ thiol‐norbornene gelation and spatiotemporal tuning of hydrogel physicochemical properties.
Van Thuy Duong, Tuba Marjan, Ngoc Ha Luong, Taimoor H. Qazi, Chien‐Chi Lin   +4 more
wiley   +1 more source