Results 21 to 30 of about 8,069 (192)
Radar Observations of Comet Nuclei and Comae [PDF]
Highlights of Astronomy, 2005 Nine comets have been detected with either the Arecibo (12.6 cm wavelength) or Goldstone (3.5 cm) radar systems. Included are six nucleus detections and five detections of echoes from coma grains. The radar backscatter cross sections measured for the nuclei correlate well with independent estimates of their sizes and are indicative of surface densities
Donald B. Campbell +3 more
openaire +1 more source
Ameliorative potential of β-1,3-D-Glucan on acrylamide-induced cytogenetic alterations in mice. [PDF]
Journal of Bioscience and Applied Research, 2016 Acrylamide (AA) is formed in food during heat preparation (frying and baking), causing DNA toxicity. So, the aim of this study is applied β-1,3-D-Glucan (BDG) as a natural polysaccharide ameliorative to reduce the DNA hepatotoxicity and genotoxicity of ...
Mohamed A. Ismail
doaj +1 more source
Comets and the Origin of Life: Structure of Comets Nuclei and Dust [PDF]
Symposium - International Astronomical Union, 2004 From observations of fragmentation events, clues to a gravitational aggregates structure of some comets nuclei are given. From in-situ and remote light scattering observations, a very high porosity is estimated for dust in comae. These results suggest a possible survival of cometary organics during atmospheric entry at the epoch of intense bombardment.
A. Chantal Levasseur-Regourd +1 more
openaire +1 more source
Splitting of Long-period Comet C/2018 F4 (PANSTARRS)
The Astronomical Journal, 2023 Long-period comet C/2018 F4 (PANSTARRS) was observed to show duplicity of its inner region in 2020 September, suggestive of a splitting event. We here present analyses of our observations of the comet taken from the LCO Outbursting Objects Key project ...
Man-To Hui +6 more
doaj +1 more source
ON COLLISION OF SECONDARY NUCLEI OF COMET P/SHOEMAKER-LEVI 9 (1993E) WITH JUPITER
Odessa Astronomical Publications, 2017 In July 1994 the comet P/Shoemaker-Levi which in July 1992 split in the Roche lobe of Jupiter onto 21 fragments, then collided with Jupiter at the altitude near – 45°.
K. I. Churyumov, V. G. Kruchinenko
doaj +1 more source
Conditions for the formation of anomalous tail of comet
Open Astronomy, 2019 The time and velocity of ejection of dust particles of anomalous tails from cometary nuclei are determined. It is revealed that some comets cause the formation of an anomalous tail is the collision of their comet nucleus with other bodies of the Solar ...
Safarov Abduljalol G. +1 more
doaj +1 more source
Open Astronomy, 2020 The hypothesis on the role of the meteoroid impacts in the comet nuclei splitting as well as acceleration of their heliocentric velocity are considered.
Guliyev Ayyub, Guliyev Rustam
doaj +1 more source
Advanced Healthcare Materials, EarlyView.Antimicrobial peptide (AMP)‐loaded nanocarriers provide a multifunctional strategy to combat drug‐resistant Mycobacterium tuberculosis. By enhancing intracellular delivery, bypassing efflux pumps, and disrupting bacterial membranes, this platform restores phagolysosome fusion and macrophage function.
Christian S. Carnero Canales +11 more
wiley +1 more source
Evaluation of the genotoxicity of some standart and eco-friendly detergents with Vicia faba
Caryologia, 2021 The increasing use of detergents as a result of rapid increase of population and irregular industrialization has a big role in the environmental pollution.
Özlem Aksoy, Aylin Horozal
doaj +1 more source
Advanced Science, EarlyView.High‐grade serous ovarian carcinoma (HGSOC) is plagued by platinum resistance, with malignant ascites closely linked to poor outcomes. Here, we identify ASCOR, a circRNA enriched in ascites small extracellular vesicles (sEVs) from platinum‐resistant HGSOC patients, as a predictor of poor survival. ASCOR enhances platinum resistance in vitro and in vivo
Hanyuan Liu +10 more
wiley +1 more source