Results 71 to 80 of about 157,342 (249)

Stabilizing Anion–Anion Aggregates via Dihydrogen Bonds in Non‐Classical Inorganic Molecules

Aggregate, Volume 7, Issue 1, January 2026.
Despite Coulomb's law, the anionic [o‐FESAN]− cluster forms stable anti‐electrostatic aggregates via short dihydrogen bonds. Experimental (nuclear magnetic resonance, dynamic light scattering, and X‐ray diffraction) and theoretical (density functional theory) studies reveal that C–H···H–B interactions overcome long‐range repulsion, enabling cluster ...
Adnana Zaulet, Miquel Nuez‐Martinez, Pipsa Hirva, Reijo Sillanpää, Francesc Teixidor, Clara Viñas   +5 more
wiley   +1 more source

Semi-supervised Learning for Photometric Supernova Classification

, 2011
We present a semi-supervised method for photometric supernova typing. Our approach is to first use the nonlinear dimension reduction technique diffusion map to detect structure in a database of supernova light curves and subsequently employ random forest
Breiman, Breiman, Breiman, Breiman, Chad M. Schafer, Chapelle, Coifman, Darren Homrighausen, Dovi Poznanski, Dubath, Falck, Freeman, Gong, Grimmett, Hastie, Homeier, Johnson, Joseph W. Richards, Kessler, Kessler, Kunz, Kuznetsova, Lafon, Newling, Nugent, Peter E. Freeman, Poznanski, Poznanski, Poznanski, Richards, Richards, Richards, Rodney, Ruppert, Sullivan, Wasserman   +35 more
core   +1 more source

Observational data on galactic supernova remnants: I. The supernova remnants within l = 0◦ - 90◦ [PDF]

Serbian Astronomical Journal, 2003
We have collected all the available data on Galactic supernova remnants given in the literature. The data on Galactic supernova remnants located in the Galactic longitude interval l=0◦-90◦ in all the spectral bands are presented in this work.
Guseinov O.H., Ankaj A., Tagieva S.O.
doaj   +1 more source

Logarithmic and Strong Coupling Models in Weyl‐Type f(Q,T)$f(Q,T)$ Gravity

Annalen der Physik, Volume 538, Issue 1, January 2026.
This work explores Weyl‐type f(Q,T) gravity using recent observational datasets — CC, Pantheon+, Union 3.0, and DESI DR2. Through MCMC analysis of logarithmic and strong coupling models, the study reveals a transition from deceleration to acceleration, quintessence‐to‐phantom dynamics, and late‐time consistency with LCDM, offering a geometry‐driven ...
Rahul Bhagat, S. K. Tripathy, B. Mishra
wiley   +1 more source

Radial Velocity Monitoring and Analysis of Gaia Astrometry of Selected Intermediate Mass Stars to Constrain Their Multiplicity Status

Astronomische Nachrichten, Volume 347, Issue 1, January 2026.
ABSTRACT We present new radial velocity measurements of 13 selected intermediate mass stars (2–6 M⊙). The measurements were performed between 29 April and 6 September 2024 at the University Observatory Jena using the échelle spectrograph FLECHAS. The radial velocity of eight stars was found to be constant during our spectroscopic monitoring, namely: 17
J. Bätz, M. Mugrauer, K.‐U. Michel, J. Reichert, A. Tschirschky, L. Pietsch, F. Edelmann, R. Neuhäuser   +7 more
wiley   +1 more source

Explosive Nucleosynthesis of Weak r-Process Elements in Extremely Metal-Poor Core-Collapse Supernovae

, 2008
There have been attempts to fit the abundance patterns of extremely metal-poor stars with supernova nucleosynthesis models for the lighter elements than Zn. On the other hand, observations have revealed that the presence of EMP stars with peculiarly high
Aoki, Chieffi, Frölich, Heger, Heger, Hideyuki Umeda, Honda, Honda, Iwamoto, Maeda, Nagataki, Natsuko Izutani, Nozomu Tominaga, Popham, Pruet, Pruet, Pruet, Pruet, Qian, Sneden, Sneden, Tominaga, Tominaga, Travaglio, Umeda, Umeda, Wanajo, Wanajo, Yoshida   +28 more
core   +1 more source

Green monomeric photosensitizing fluorescent protein for photo-inducible protein inactivation and cell ablation

BMC Biology, 2018
Background Photosensitizing fluorescent proteins, which generate reactive oxygen species (ROS) upon light irradiation, are useful for spatiotemporal protein inactivation and cell ablation.
Yemima Dani Riani, Tomoki Matsuda, Kiwamu Takemoto, Takeharu Nagai   +3 more
doaj   +1 more source

Supernova 1988A: another clumped supernova [PDF]

Monthly Notices of the Royal Astronomical Society, 1991
The evolution of the forbidden multiplet (1F) oxygen lines in the optical spectrum of SN 1988A is used to determine the evolution of the optical depth in those transitions which in turn can be used to derive the number density of oxygen in the ejecta.
openaire   +1 more source

Sulphur Analogues of Homoisoflavonoids as Potential Treatments for Neovascular Eye Diseases

ChemMedChem, Volume 21, Issue 2, January 2026.
Neovascular eye diseases are characterised by the abnormal growth of often fragile blood vessels in the eye. Treatment focuses on reducing angiogenesis as well as reducing oxidative stress induced inflammation, a key underlying cause. Synthetic sulphur analogues of naturally occurring homoisoflavonoids, synthesised in three steps, have shown promise as
Jacob D. Hiles, Ola Deri, Kamakshi Sishtla, Joseph C. Bear, Jeremy K. Cockcroft, Elizabeth I. Opara, Ali A. Al‐Kinani, Raid G. Alany, Timothy W. Corson, Sianne L. Schwikkard   +9 more
wiley   +1 more source

Hydrogen-rich to stripped-envelope: observational continuity and biases in CCSNe

Frontiers in Astronomy and Space Sciences
Although historically classified into discrete subclasses, there is growing evidence that indicates that core-collapse supernovae (CCSNe) categories often overlap, reflecting continuous variations in progenitor structure, mass-loss history, and ...
Anjasha Gangopadhyay, Priscila J. Pessi, Priscila J. Pessi   +2 more
doaj   +1 more source