Results 61 to 70 of about 5,916 (262)

JWST-TST High Contrast: Asymmetries, Dust Populations, and Hints of a Collision in the β Pictoris Disk with NIRCam and MIRI

The Astronomical Journal
We present the first JWST Mid-Infrared Instrument (MIRI) and Near Infrared Camera (NIRCam) observations of the prominent debris disk around β Pictoris.
Isabel Rebollido, Christopher C. Stark, Jens Kammerer, Marshall D. Perrin, Kellen Lawson, Laurent Pueyo, Christine Chen, Dean Hines, Julien H. Girard, Kadin Worthen, Carl Ingerbretsen, Sarah Betti, Mark Clampin, David Golimowski, Kielan Hoch, Nikole K. Lewis, Cicero X. Lu, Roeland P. van der Marel, Emily Rickman, Sara Seager, Rémi Soummer, Jeff A. Valenti, Kimberly Ward-Duong, C. Matt Mountain   +23 more
doaj   +1 more source

Targeting Dnmt3a/m5C/RelA Axis Attenuates Microglia Inflammatory Response and Improves Postoperative Recovery in Chronic Compressive Cervical Spinal Cord Injury

Advanced Science, EarlyView.
A pro‐inflammatory microglial subset persists after decompression in chronic compressive cervical spinal cord injury and shows enhanced Dnmt3a‐driven m5C signaling. By stabilizing RelA mRNA, this axis sustains NF‐κB activation and postoperative neuroinflammation.
Tianyu Qin, Yuan Jiang, Yongheng Xie, Huanwei Qu, Wenbin Yan, Jingle Chen, Yining Chen, Huayi Li, Naibo Feng, Jiajun Wu, Chao Zhang, Zhengqi Huang, Ming Shi, Zhihuai Deng, Guozhi Xiao, Houqing Long   +15 more
wiley   +1 more source

Microblasting Wound Dressings Mechanically Disrupt Polymicrobial Biofilms to Enhance Healing in Treatment‐Resistant Wounds

Advanced Science, EarlyView.
Treatment‐resistant wounds caused by polymicrobial biofilms are refractory to conventional therapies due to the dense extracellular matrices. We developed μBLAST, a microblasting wound dressing that combines MnO2‐doped biosilica and a H2O2‐releasing mesh to generate localized oxygen microbubbles that mechanically disrupt biofilms.
Yujin Ahn, Joo Hun Lee, Christian Hurd, Jiye Lee, Junggeon Park, Adam A. Markowicz, Zheyuan Zhang, Joanne Hwang, Guillermo L. Monroy, Simon A. Rogers, Woonggyu Jung, Stephen A. Boppart, Hyunjoon Kong   +12 more
wiley   +1 more source

Discovery of a Debris Disk around TWA 20

The Astrophysical Journal
We report the discovery of a debris disk surrounding the M3 star TWA 20, revealed by JWST coronagraphic observations using the Near Infrared Camera. With reference differential imaging (RDI), we resolve the disk in scattered light in the F200W filter at ...
Skyler Palatnick, Maxwell A. Millar-Blanchaer, Jingwen Zhang, Kellen Lawson, Briley L. Lewis, Katie A. Crotts, Aarynn L. Carter, Beth Biller, Julien H. Girard, Sebastian Marino, Raphaël Bendahan-West, Giovanni M. Strampelli, Andrew D. James, Klaus Subbotina Stephenson, Rodrigo Ferrer-Chavez, Mark Booth, Ben J. Sutlieff, Aniket Sanghi, Clémence Fontanive, Emily Rickman, Isabel Rebollido, Kielan Hoch, William O. Balmer   +22 more
doaj   +1 more source

Micro‐Galvanic Coupling Programs the Therapeutic Zinc Ion Window to Reconfigure Immune Cascades for Pro‐Regenerative Bone Healing

Advanced Science, EarlyView.
This study utilized alloy micro‐galvanic coupling design to regulate the release of essential elements, thereby programming immune responses and promoting regeneration. The sacrificial anodic process of Zn‐0.8Mg reduced Zn2+ release compared to the “large cathode‐small anode” coupling of Zn‐0.8Fe.
Chaoyang Sun, Bo Jia, Jiahui Shi, Shuang Li, Guo Bao, Dong Bian, Kai Chen, Junlong Tan, Xuenan Gu, Yan Guan, Yu Qin, Xinhua Qu, Xiaogang Wang, Yufeng Zheng, Hongtao Yang   +14 more
wiley   +1 more source

Tandem Duplication‐Driven Neofunctionalization of UDP‐Glycosyltransferases Shapes the Diversification of Triterpenoid Saponins in the Cucurbitaceae

Advanced Science, EarlyView.
We present a chromosome‐level genome assembly of Siraitia grosvenorii and, through comparative genomics, uncover a conserved UGT73 tandem array driving triterpenoid saponin diversification in Cucurbitaceae. Crystalized SgUGT73AM30 further reveals the regioselectivity mechanism underlying its catalytic activity.
Guangyi Wang, Mengmeng Li, Xuehui Dai, Yanchen Zhang, Yuhan Wu, Zhaotao Yan, Chenfei Tian, Hongkai Fan, Haili Liu, Xiaowei Zhang, Yiming Yang, Jiayu Lu, Yuwei Sun, Yong Wang   +13 more
wiley   +1 more source

A Uniform Analysis of Debris Disks with the Gemini Planet Imager. I. An Empirical Search for Perturbations from Planetary Companions in Polarized Light Images

The Astrophysical Journal
The Gemini Planet Imager (GPI) has excelled in imaging debris disks in the near-infrared. The GPI Exoplanet Survey imaged 24 debris disks in polarized H -band light, while other programs observed half of these disks in polarized J and/or K 1 bands. Using
Katie A. Crotts, Brenda C. Matthews, Gaspard Duchêne, Thomas M. Esposito, Ruobing Dong, Justin Hom, Rebecca Oppenheimer, Malena Rice, Schuyler G. Wolff, Christine H. Chen, Clarissa R. Do Ó, Paul Kalas, Briley L. Lewis, Alycia J. Weinberger, David J. Wilner, Mark Ammons, Pauline Arriaga, Robert J. De Rosa, John H. Debes, Michael P. Fitzgerald, Eileen C. Gonzales, Dean C. Hines, Sasha Hinkley, A. Meredith Hughes, Ludmilla Kolokolova, Eve J. Lee, Ronald A. López, Bruce Macintosh, Johan Mazoyer, Stanimir Metchev, Maxwell A. Millar-Blanchaer, Eric L. Nielsen, Jenny Patience, Marshall D. Perrin, Laurent Pueyo, Fredrik T. Rantakyrö, Bin B. Ren, Glenn Schneider, Remi Soummer, Christopher C. Stark   +39 more
doaj   +1 more source

CONSTRAINTS ON PLANETESIMAL COLLISION MODELS IN DEBRIS DISKS

The Astrophysical Journal, 2016
ABSTRACT Observations of debris disks offer a window into the physical and dynamical properties of planetesimals in extrasolar systems through the size distribution of dust grains. In particular, the millimeter spectral index of thermal dust emission encodes information on the grain size distribution. We have made new VLA observations of
Meredith A. MacGregor, David J. Wilner, Claire Chandler, Luca Ricci, Sarah T. Maddison, Steven R. Cranmer, Sean M. Andrews, A. Meredith Hughes, Amy Steele   +8 more
openaire   +3 more sources

Chemically Gradient Ordered Nanodomains Enable Large Tensile Ductility in Gigapascal Lightweight Refractory High‐Entropy Alloys

Advanced Science, EarlyView.
A high‐strength lightweight refractory high‐entropy alloy achieves extraordinary ductility owing to the introduction of coherent chemically gradient ordered nanodomains (CGONs). The CGONs not only serve as effective barriers to dislocation motion (strengthening) but also significantly promote dislocation nucleation and multiplication (ductilizing) upon
Wei Zhang, Dingshun Yan, Yong Zhang, Zhiming Li   +3 more
wiley   +1 more source

Size Limits on Tidal Debris around White Dwarfs: The Kilometer-size Barrier

The Astrophysical Journal Letters
Compact disks of planetary debris orbiting white dwarfs provide a crucial window into our understanding of evolved planetary systems. The formation of these disks has been widely modeled with tidal fragmentation of minor planets that are rubble piles ...
Jordan K. Steckloff, Dimitri Veras, Kathryn Volk   +2 more
doaj   +1 more source