Results 51 to 60 of about 126,616 (274)

Observations of red-giant variable stars by Aboriginal Australians

, 2017
Aboriginal Australians carefully observe the properties and positions of stars, including both overt and subtle changes in their brightness, for subsistence and social application. These observations are encoded in oral tradition.
Allen R. H., Anonymous, Aristotle 350 BCE, Bailey J., Bailey J., Bates D., Battiste M., Berndt R. M., Berndt R. M., Bhathal R., Cairns H. C., Clarke P. A., Clarke P. A., Clarke P. A., Clarke P. A., Clunies Ross M., Frew D. J., Hamacher D. W., Hamacher D. W., Hamacher D. W., Hamacher D. W., Hamacher D. W., Hamacher D. W., Hamacher D. W., Hamacher D. W., Harmanec P., Haynes R. D., Herschel J. F. W., Hoffleit D., Howitt A., Isles J., Jetsu L., Johnson D. D., Johnson D. D., Leaman T. M., Maegraith B., McNight D., Meyer H. A. E., Mountford C. P., North G., Parker K. L., Prober S. M., Taplin G., Tindale N. B., Tindale N. B., Tindale N. B., White I. M., Wilk S. R., Wilk S. R.   +48 more
core   +1 more source

On the polarimetric variability of bright O-type stars [PDF]

, 2002
Polarimetric data associated with multi-parameter observational campaigns of selected bright O-type stars and their variable winds, are analysed in relation to the outcomes of the UV and optical spectroscopic studies.
Clarke, D., Henrichs, H.F., McDavid, D., Smith, R.A.   +3 more
core   +3 more sources

Imeglimin attenuates liver fibrosis by inhibiting vesicular ATP release from hepatic stellate cells

FEBS Letters, EarlyView.
Imeglimin, at clinically relevant concentrations, inhibits vesicular ATP accumulation and release from hepatic stellate cells, thereby attenuating purinergic signaling and reducing fibrogenic activation. This mechanism reveals a newly identified antifibrotic action of imeglimin beyond glycemic control.
Seiji Nomura, Lixiang Wang, Nao Hasuzawa, Ayako Nagayama, Sawako Moriyama, Kenji Ashida, Yoshinori Moriyama, Masatoshi Nomura, Ken Yamamoto   +8 more
wiley   +1 more source

Period–Luminosity Relations for Double-mode δ Sct Stars

The Astrophysical Journal
Previous studies of the period–luminosity relations (PLRs) of Delta Scuti ( δ Sct) stars have focused on those with a single pulsation mode. However, for δ Sct stars with many different pulsation modes, classifying a single mode is difficult.
Qi Jia, Xiaodian Chen, Shu Wang, Licai Deng, Jianxing Zhang, Qingquan Jiang   +5 more
doaj   +1 more source

The Araucaria Project. Bright Variable Stars in NGC 6822 from a Wide-Field Imaging Survey

, 2006
We have performed a search for variable stars in the dwarf irregular galaxy NGC 6822 using wide-field multi-epoch VI photometry down to a limiting magnitude $V$ $\sim$ 22.
Aerts, Aikawa, Antonello, Antonello, Baldacci, Baldacci, Baldacci, Breger, Clementini, de Jager, Fraser, G. Pietrzyński, Gieren, I. Soszyński, Jones, Massey, McGonegal, McGonegal, Mennickent, Pietrzynski, Pietrzynski, R. E. Mennickent, Ratnatunga, Schlegel, Schmidt, Schwarzenberg-Czerny, W. Gieren   +26 more
core   +1 more source

Finding the most variable stars in the Orion Belt with the All Sky Automated Survey [PDF]

, 2010
We look for high-amplitude variable young stars in the open clusters and associations of the Orion Belt. We use public data from the ASAS-3 Photometric V-band Catalogue of the All Sky Automated Survey, infrared photometry from the 2MASS and IRAS ...
Acke, Alonso, Bailer-Jones, Balona, Bibo, Bonnarel, Bouvier, Braune, Briceño, Briceño, Briceño, Brown, Béjar, Caballero, Caballero, Caballero, Caballero, Caballero, Caballero, Caballero, Caballero, Caballero, Caballero, Caballero, Carpenter, Cieslinski, Cohen, Cohen, Collier Cameron, de Zeeuw, Downes, Downes, Ducourant, Eiroa, Eiroa, Epchtein, Fedorovich, Franciosini, Gettel, Glass, Gregorio-Hetem, Guetter, Hamilton, Hartmann, Herbig, Herbig, Herbst, Herbst, Hernández, Hernández, Hirth, Hoffmeister, Høg, Irwin, Jablonski, Jeffries, Jones, Joy, Jura, Kaiser, Kippenhahn, Koch, Kogure, Kovalchuk, Kraemer, Kurochkin, Kwok, Königl, Landstreet, Luyten, MacConnell, Maheswar, Marconi, Marconi, McKnelly, Miller Barr, Monet, Mora, Nakano, Nesterov, Nogami, Ogura, Oliveira, Osaki, Parihar, Patterson, Patterson, Pickering, Pickering, Pojmański, Pojmański, Richter, Ripepi, Robertson, Rosenbush, Röser, Scargle, Schirmer, Scholz, Scholz, Scholz, Sherry, Shu, Skrutskie, Sloan, Speck, Stassun, Stebbins, Stephenson, Sterken, Sterzik, Struve, Szkody, Templeton, Terrell, Thorstensen, Thé, Torres, Valenti, van den Ancker, van den Ancker, Vennes, Vieira, Voges, Vrba, Walborn, Walker, Walker, Warren, Weaver, Weintraub, Wiramihardja, Wolf, Wolf, Wouterloot, Yudin, Zapatero Osorio, Zapatero Osorio   +137 more
core   +3 more sources

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

Modeling of Two Low-amplitude Radially Pulsating δ Scuti Stars: KIC 12602250 and KIC 5768203

The Astrophysical Journal
In this research, we conducted systematic photometric, spectroscopic, and theoretical modeling analyses of two δ Scuti stars—KIC 12602250 and KIC 5768203—that pulsate only in radial modes.
Shuguo Ma, A-Li Luo, Peng Wei, Chenglong Lv, Ming Yang, Fang Zuo, Yingzhen Cui, Shuo Li, Gang Meng, Wen Hou, Yuji He, Yinbi Li, Zhongyang Liu, Xiao-Xiao Ma, Jun-Chao Liang, Fei Dang, Daoye Yang, Ali Esamdin, Hao Zeng, Cai-Xia Qu   +19 more
doaj   +1 more source

Transient Corotating Clumps around Adolescent Low-mass Stars from Four Years of TESS

The Astronomical Journal, 2023
Complex periodic variables (CPVs) are stars that exhibit highly structured and periodic optical light curves. Previous studies have indicated that these stars are typically disk-free pre-main-sequence M dwarfs with rotation periods ranging from 0.2 to 2 ...
Luke G. Bouma, Rahul Jayaraman, Saul Rappaport, Luisa M. Rebull, Lynne A. Hillenbrand, Joshua N. Winn, Alexandre David-Uraz, Gáspár Á. Bakos   +7 more
doaj   +1 more source

4‐nitrobenzoate inhibits 4‐hydroxybenzoate polyprenyltransferase in malaria parasites and enhances atovaquone efficacy

FEBS Letters, EarlyView.
Atovaquone is an antimalarial requiring potentiation for sufficient efficacy. We pursued strategies to enhance its activity, showing that 4‐nitrobenzoate inhibits 4‐hydroxybenzoate polyprenyltransferase, decreasing ubiquinone biosynthesis. Since atovaquone competes with ubiquinol in mitochondria, 4‐nitrobenzoate facilitates its action, potentiating ...
Ignasi Bofill Verdaguer, Matheus Felipe Santos, Maurício Mazzine Filho, Gabriela Oliveira Castro, Agustín Hernández, Manoel Aparecido Peres, Alejandro Miguel Katzin, Marcell Crispim   +7 more
wiley   +1 more source