Results 21 to 30 of about 4,657 (224)

The Earth and Comets' Tails [PDF]

Scientific American, 1910
IN spite of the unreserved predictions of astronomers, the earth did not pass through the tail of Halley's comet on May 18–19, nor subsequently. The tail as seen in the morning sky, previous to the transit of the comet across the sun's disc, appeared like a long and straight beam of light stretching from the horizon to Aquila.
openaire   +3 more sources

Mechanically Mutable Matrices: A Hierarchical Investigation of Decellularized Sea Cucumber Collagen as an Adaptable Scaffold Material

Advanced Functional Materials, EarlyView.
Sea cucumber mutable collagenous tissue (MCT) is a remarkable collagen‐based material which can rapidly undergo large changes in stiffness through transiently bound effector proteins. Here, we investigate the hierarchical structure and mechanical response of MCT from Cucumaria frondosa across length scales with a wide range of methods, also exploring ...
Nathalie R. H. Singh, Amy K. Lin, Sabra Rostami, Cameron Hastie, Paul W. Wiseman, Patrick Flammang, Christopher Moraes, Matthew J. Harrington   +7 more
wiley   +1 more source

Characterization of the Dust and Sodium Tails of Comet C/2020 F3 (NEOWISE) from Parker Solar Probe and Amateur Observations

The Planetary Science Journal
Comet C/2020 F3 (NEOWISE) reached perihelion on 2020 July 3 at 0.29 au and exhibited a highly structured dust tail. Using a simplified Finson–Probstein model, structures such as striae, observed in the tail in images obtained by the Parker Solar Probe ...
Qasim Afghan, Geraint H. Jones, Karl Battams, Oliver Price, Andrew J. Coates   +4 more
doaj   +1 more source

Cytotoxicity and Genotoxicity Evaluation of Fluorapatite/bioactive Glass Nanocomposite Foams With Two Various Weight Ratios as Bone Tissue Scaffold: an in vitro study [PDF]

Iranian Journal of Materials Science and Engineering, 2022
The optimization of biomaterials biodegradation rate similar to tissue regeneration, is one of the main goals in the field of tissue engineering. However, the necessity to assess their possible toxicity is always considered.
Ebrahim Zabihi, Roghayeh Pourbagher, Seyedali Seyedmajidi   +2 more
doaj  

MED1, a novel binding partner of BRCA1, regulates homologous recombination and R-loop processing

Scientific Reports, 2022
Homologous recombination (HR) is a major repair pathway of DNA double-strand breaks and is closely related to carcinogenesis. HR deficiency has been established as a therapeutic target.
Harunori Honjoh, Michihiro Tanikawa, Osamu Wada-Hiraike, Katsutoshi Oda, Hirofumi Inaba, Asako Kukita, Yoshiko Kawata, Misako Kusakabe, Saki Tsuchimochi, Ayumi Taguchi, Yuichiro Miyamoto, Kenbun Sone, Tetsushi Tsuruga, Mayuyo Mori-Uchino, Yoko Matsumoto, Yutaka Osuga   +15 more
doaj   +1 more source

Recent Advances in Ferrite‐Based Materials for Biomedical Applications: A Comprehensive Review

Advanced Materials, EarlyView.
Ferrite nanoplatforms are presented as tunable biomedical materials in which synthesis control, cation engineering, defect/morphology regulation, and surface functionalization govern structure–property–bioactivity relationships. These design strategies enable multifunctional applications including MRI contrast, magnetic hyperthermia, targeted drug ...
Pramod D. Mhase, Varsha C. Pujari, Akash V. Fulari, Sunil M. Patange, Sean Li, Danyang Wang, Sagar E. Shirsath   +6 more
wiley   +1 more source

Recurrent Cometary Activity Discovered on Quasi-Hilda Jupiter Family Comet 362P/(457175) 2008 GO98

The Astrophysical Journal Letters
We report the discovery of recurrent activity on quasi-Hilda comet (QHC) 362P/(457175) 2008 GO _98 . The first activity epoch was discovered during the perihelion passage of 362P in 2016, so we were motivated to observe it for recurrent cometary activity
Kennedy A. Farrell, Colin Orion Chandler, Chadwick A. Trujillo, William J. Oldroyd, Jarod A. DeSpain, Mark Jesus Mendoza Magbanua, Maxwell K. Frissell, Phineas Stone   +7 more
doaj   +1 more source

Exocomets size distribution in the $$\beta$$ β Pictoris planetary system

Scientific Reports, 2022
The star $$\beta$$ β  Pictoris harbors a young planetary system of about 20 million years old, which is characterized by the presence of a gaseous and dusty debris disk, at least two massive planets and many minor bodies.
Alain Lecavelier des Etangs, Lucie Cros, Guillaume Hébrard, Eder Martioli, Marc Duquesnoy, Matthew A. Kenworthy, Flavien Kiefer, Sylvestre Lacour, Anne-Marie Lagrange, Nadège Meunier, Alfred Vidal-Madjar   +10 more
doaj   +1 more source

β‐Elemene Rescues Radiation‐Induced Enteritis by Orchestrating a Host‐Microbiome Circuit That Fuels Epigenetic DNA Repair

Advanced Science, EarlyView.
This study elucidates that β‐elemene promotes cellular uptake of L. gasseri‐derived lactate by enhancing the membrane translocation of MCT1 in a CD147‐dependent manner. Intracellular lactate, through the lactylation of RBBP4 at the K26 site, recruits EP300 to the promoter regions of downstream genes (POLD1/POLD3), catalyzing H3K27ac modification.
Jiancheng He, Jiapeng Bao, Shukang Deng, Weijie Zang, Haoming Yan, Zihao Zhao, Guangze Zhang, Ruiqing Liu, Junjie Chen, Yilin Hu, Wanjiang Xue   +10 more
wiley   +1 more source

Statistical Analysis of Comet Disconnection Events Using STEREO HI and a Data-assimilative Solar Wind Model

The Astrophysical Journal
Comets tails can reveal information about the local solar wind conditions. They can exhibit various signatures of interactions with the solar wind including bending, developing kinks, and sometimes undergoing tail disconnections.
Sarah Watson, Chris Scott, Mathew Owens, Luke Barnard, Matthew Lang   +4 more
doaj   +1 more source