Results 61 to 70 of about 11,830 (280)

LINEAR PULSATION CHARACTERISTICS OF MIRA VARIABLE STARS

Journal of Sciences, Islamic Republic of Iran, 2003
The linear adiabatic pulsation-periods of Mira variable stars have been derived. Approximately 2701[1]models were calculated for M = 0.7 MΘ to 2 MΘ stars with radii from 180 RΘ to 340 RΘ and luminosities from 2800 LΘ to 10,000 LΘ. The chemical composition of all models is (X,Z) = (0.7,0.02). From the result of this study, linear relations on Luminosity-
openaire   +2 more sources

EDNRB‐dependent endothelin signaling reduces proliferation and promotes proneural‐to‐mesenchymal transition in gliomas

Molecular Oncology, EarlyView.
Glioma cells mainly express the endothelin receptor EDNRB, while EDNRA is restricted to a perivascular tumor subpopulation. Endothelin signaling reduces glioma cell proliferation while promoting migration and a proneural‐to‐mesenchymal transition associated with poor prognosis. This pathway activates Ca2+, K+, ERK, and STAT3 signalings and is regulated
Donovan Pineau, Leonor Garcia, Hugo Arnold, Antonija Hanžek, Maialen Arrieta, Laurent R Gauthier, Christine Granotier‐Beckers, François D Boussin, Amaury Herbet, Marie Hautière, Valentin Asei‐Ceschino, Clémentin Jacques, Laura Brard, Thomas Harnois, Valérie Coronas, Bruno Constantin, Aurélien Chatelier, Jean Chemin, Serge Urbach, Martial Seveno, Szimonetta Hideg, Chantal Ripoll, Kasandra Aguilar‐Cázarez, Min Zheng, Guo‐Hao Huang, Sheng‐Qing Lv, Lei Zhang, Philippe Rondard, Laurent Prezeau, Jean‐Philippe Pin, Hugues Duffau, Luc Bauchet, Valérie Rigau, Franck Denat, Charles Truillet, Didier Boquet, Jean‐Philippe Hugnot   +36 more
wiley   +1 more source

Observational Properties of β Cephei Stars: 88 New Samples Discovered Based on TESS and Gaia Data

The Astrophysical Journal Supplement Series
We present a systematic investigation of β Cephei (BCEP) stars by integrating photometric data from the Transiting Exoplanet Survey Satellite (TESS) with astrometric parameters from Gaia Data Release 3.
Xiang-dong Shi, Sheng-bang Qian, Li-ying Zhu, Lin-jia Li, Er-gang Zhao, David Mkrtichian, Farkhodjon Khamrakulov, Wen-xu Lin   +7 more
doaj   +1 more source

Four New Delta Scuti Pulsators from a Variability Survey of 131 Stars

, 2002
In a photometric variability survey of 131 stars with B < 14 mag, we have found four new Delta Scuti stars. We were sensitive to oscillation amplitudes as low as a few mmag.
Alexei V. Filippenko, Eyer L., Groot P., Hog E., J. L. Sokoloski, Kholopov P. N., Lars Bildsten, Lopez de Coca P., Munari U., Petersen J. O., Pojmanski G., R. Chornock, Sokoloski J. L., Udalski A., Udalski A., Udalski A., Viskum M., Viskum M.   +17 more
core   +2 more sources

Cell‐cycle‐specific lesion evolution rather than inhibition of double‐strand‐break repair underpins cisplatin radiosensitization

Molecular Oncology, EarlyView.
We analyze cisplatin–DNA adducts (CDAs) and double‐strand breaks (DSBs) in a cell‐cycle‐dependent manner. We find that CDAs form similarly across all cell cycle phases. DSBs arise only in S‐phase. CDAs might not directly impair DSB repair, but S‐phase DSB lesions evolve in the presence of CDAs and disrupt repair in G2, also causing radiosensitization ...
Ye Qiu, Xixi Lin, Emil Mladenov, Veronika Mladenova, Jürgen Thomale, Ali Sak, Yao Wang, Yunxuan Deng, Eleni Gkika, Martin Stuschke, George Iliakis   +10 more
wiley   +1 more source

The first CCD photometric study of the open cluster NGC 2126

, 2003
We present the first CCD photometric observations of the northern open cluster NGC 2126. Data were taken on eight nights in February and December 2002 with a total time span of ~57 hours.
A. Derekas, A. Gáspár, Arentoft, Bertelli, Bessell, Breger, Breger, Chevalier, Choo, Cs. Kiss, Cuffey, Cutispoto, Frandsen, Gilliland, Gy. M. Szabó, Handler, K. Sárneczky, Kim, Kim, Kim, Kiss, L. L. Kiss, M. Váradi, Mkrtichian, Monet, Ohshima, Reed, Rieke, Rodríguez, Rodríguez, Rucinski, S. Kaspi, Stellingwerf, T. R. Bedding, Thompson, Willems   +35 more
core   +1 more source

Chaos in variable stars: Topological analysis of W Vir model pulsations [PDF]

Chaos: An Interdisciplinary Journal of Nonlinear Science, 1996
The topological characterization of chaos is applied to the irregular pulsations of a model for a star of the W Virginis type, computed with a state-of-the-art numerical hydrodynamical code. The banded W Vir attractor is found to possess an additional twist when compared to the Rössler band.
Letellier, Christophe, Gouesbet, G., Soufi, F., Buchler, J.R., Kolláth, Z.   +4 more
openaire   +5 more sources

Targeting TNBC: core–shell polycationic polyurea dendrimers with inherent anticancer activity

FEBS Open Bio, EarlyView.
Core–shell polycationic PURE dendrimers were tested in TNBC‐derived tumor models. Both formulations selectively targeted TNBC and effectively reduced tumor volume. PUREG4‐OEI48 suppressed tumor growth without detectable toxicity, whereas PUREG4‐OCEI24, despite showing efficacy, induced hepatic toxicity.
Adriana Cruz, Bruna Abreu, Cindy Mendes, Catarina Freitas‐Dias, Filipe Gonçalves, Fernanda Silva, José Ramalho, Saudade André, Vasco D. B. Bonifácio, Jacinta Serpa   +9 more
wiley   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Variable Blue Straggler Stars in the Open Cluster NGC 6819 Observed in the Kepler “Superstamp” Field

The Astronomical Journal, 2023
NGC 6819 is an open cluster of age 2.4 Gyr that was in the NASA Kepler spacecraft’s field of view from 2009 to 2013. The central part of the cluster was observed in a 200 × 200 pixel “superstamp” during these four years in 30 minute cadence photometry ...
Joyce A. Guzik, Andrzej S. Baran, Sachu Sanjayan, Péter Németh, Anne M. Hedlund, Jason Jackiewicz, Lori R. Dauelsberg   +6 more
doaj   +1 more source