Results 91 to 100 of about 4,196,526 (247)

Acid‐Responsive Nanobot‐Integrated Core‐Shell Microneedles Reprogram the Degenerative Annulus Fibrosus Microenvironment Through Epigenetic Suppression of Ferroptosis

Advanced Science, EarlyView.
An acid‐responsive core‐shell microneedle system normalizes the degenerative annulus fibrosus microenvironment by consuming pathological H+, generating O2, and providing NIR‐amplified redox buffering. Mechanistically, it epigenetically suppresses ferroptosis via DNMT3A‐dependent methylation of the ATF3 promoter, relieving ATF3‐mediated repression of ...
Lu Tan, Yan Zheng, Yue Lan, Zhuo Cheng, Siya Wang, Changqing Li, Yanqiu Wang, Minghan Liu   +7 more
wiley   +1 more source

Initial Mass Functions of Young Stellar Clusters from the Gemini Spectroscopic Survey of Nearby Galaxies. I. Young Massive Clusters in the Antennae Galaxies

The Astronomical Journal
The stellar initial mass function (IMF) is a key parameter to understand the star formation process and the integrated properties of stellar populations in remote galaxies.
Jae-Rim Koo, Hyun-Jeong Kim, Beomdu Lim
doaj   +1 more source

Young and old massive star clusters and their stellar populations - Theoretical challenges for the next decade

, 2015
Several models presented in the literature compete to explain the origin of multiple stellar populations in globular clusters (GC), but they all fail to reproduce the large variety of present-day characteristics of these systems. In parallel, independent
Corinne Charbonnel
core   +1 more source

Covert Optical Fingerprints Within Overt Structural Colors via Cascaded Cavity Resonances

Advanced Science, EarlyView.
Cascaded photonic–plasmonic cavities combine vivid structural colors with hidden stochastic optical fingerprints in a single monolithic platform. Layered cavities control the overt appearance, while disordered nanogap resonances generate covert scattering with limited mutual influence.
Gyurin Kim, Jiyeong Ma, Juhwan Kim, JuHyeong Lee, Heungchan Kwon, Young Min Song, Hyeon‐Ho Jeong   +6 more
wiley   +1 more source

Automated Computer Vision Cluster Identification in the Fireworks Galaxy

The Astrophysical Journal
We present the integrated photometry, radii, and spatial distribution of young (≤25 Myr) star cluster candidates in NGC 6946. NGC 6946, also known as the Fireworks Galaxy, is a highly star-forming galaxy with numerous young massive clusters.
Debby Tran, Benjamin Williams, Emily Levesque, Emerson Bowles, Bo-Eun Choi, L. Clifton Johnson, Anil Seth, Tobin M. Wainer   +7 more
doaj   +1 more source

EWOCS-IX: JWST/NIRCam observations of Westerlund 2

Astronomy & Astrophysics
Context. Investigating substellar populations in young massive clusters offers crucial insights into the formation of brown dwarfs (BDs) and the role of environmental conditions in shaping their properties. Westerlund 2 (Wd2), as one of the nearest dense
Almendros-Abad V., Guarcello M. G., Mužić K., Scholz A., Andersen M., Bayo A., Best W., Capela D., Gennaro M., Ginsburg A., Lovell J. B., Monsch K., Moraux E., Prisinzano L., Rom T., Sabbi E., Zeidler P., Argiroffi C., Bonito R., Calzetti D., Cusimano V., Damiani F., Drake J. J., Haworth T. J., Richardson N. D., Robberto M., Sciortino S., Wright N. J., Ziliotto T.   +28 more
doaj   +1 more source

The Dynamical Ejections of Massive Stars from Young Star Clusters [PDF]

, 2017
Massive stars form in star clusters or OB associations which may be expanded clusters. Such stars can be expelled with a high velocity from their birth cluster through a strong close encounter with other cluster members.
Oh, Seungkyung
core  

Solvent‐Free Synthesis of Ultrabright Carbon Dots With Near‐Unity Quantum Yield for High‐Performance Light‐Emitting Diodes

Advanced Science, EarlyView.
A rational, solvent‐free synthesis utilizing 2,6‐diaminonaphthalene produces ultrabright green‐emissive carbon dots. Regulated by a self‐limiting oxidative capping mechanism, excitons undergo ultrafast intra‐particle funneling from the nitrogen‐doped carbon core to emissive surface traps.
Hyeonjin Park, Su Hwan Lee, Sejeong Seo, Soye Park, Soo min Ji, Hyunda Jo, Sehyeon Park, Young‐Hoon Kim, Woosung Kwon   +8 more
wiley   +1 more source

Integration of the D‐Genome Reshapes Gene Transcription, Chromatin Architecture, and Metabolome of Allohexaploid Wheat, Leading to Enhanced Environmental Adaptability

Advanced Science, EarlyView.
Integration of the D‐genome reshapes gene transcription, chromatin architecture, and the metabolome of hexaploid wheat, leading to enhanced adaptability to salt, UV‐B, and alkali stress. ABSTRACT The hybridization‐led integration of the D‐genome into domesticated tetraploid wheat gave rise to allohexaploid wheat, the most cultivated wheat globally ...
Yanyan Liu, Tao Zhu, Ziru Zhou, Wei Chen, Chao He, Xinkai Zhou, Xin Wang, Chuanye Chen, Bo Yang, Jiaqi Wei, Caixia Lan, Mengmeng Liu, Handong Su, Qiang Li, Xin Hu, Siteng Bi, Weizhi Ouyang, Xingwang Li, Hailiang Mao, Masahiro Kishi, Kerstin Kaufmann, Alisdair R. Fernie, Dijun Chen, Wenhao Yan   +23 more
wiley   +1 more source

FEAST: JWST Uncovers the Emerging Timescales of Young Star Clusters in M83

The Astrophysical Journal
We present JWST NIRCam observations of the emerging young star clusters (eYSCs) detected in the nearby spiral galaxy M83. The NIRcam mosaic encompasses the nuclear starburst, the bar, and the inner spiral arms.
Alice Knutas, Angela Adamo, Alex Pedrini, Sean T. Linden, Varun Bajaj, Jenna E. Ryon, Benjamin Gregg, Ahmad A. Ali, Eric P. Andersson, Arjan Bik, Giacomo Bortolini, Anne S. M. Buckner, Daniela Calzetti, Ana Duarte-Cabral, Bruce G. Elmegreen, Helena Faustino Vieira, John S. Gallagher, Kathryn Grasha, Kelsey Johnson, Thomas S.-Y. Lai, Drew Lapeer, Matteo Messa, Göran Östlin, Elena Sabbi, Linda J. Smith, Monica Tosi   +25 more
doaj   +1 more source