Results 101 to 110 of about 164,599 (350)

Prebiotic chemicals—amino acid and phosphorus—in the coma of comet 67P/Churyumov-Gerasimenko

Science Advances, 2016
The detection of glycine and phosphorus in the coma of 67P shows that comets contain all ingredients to help spark life on Earth. The importance of comets for the origin of life on Earth has been advocated for many decades.
K. Altwegg, H. Balsiger, A. Bar-Nun, J. Berthelier, A. Bieler, P. Bochsler, C. Briois, U. Calmonte, M. Combi, H. Cottin, J. de Keyser, F. Dhooghe, B. Fiethe, S. Fuselier, S. Gasc, T. Gombosi, K. Hansen, M. Haessig, A. Jäckel, E. Kopp, A. Korth, L. Le Roy, U. Mall, B. Marty, O. Mousis, T. Owen, H. Rème, M. Rubin, T. Sémon, C. Tzou, J. Hunter Waite, P. Wurz   +31 more
semanticscholar   +1 more source

ON THE ORIGIN OF COMETS

Chinese Journal of Space Science, 1982
Abstract The fact that comets are rich in volatile material shows that they were formed and kept for a long time in the outer, low-temperature regions of the solar system. In this paper we analyse the structure in the outer edge of the solar nebula and show that no formation zone of comets can exist there. Our view is that the comets evolved from the
null Hu Zhong-wei, null Yang Ke-zhong
openaire   +1 more source

Far‐UV emissions from the SL9 impacts with Jupiter [PDF]

, 1995
Observations with the International Ultraviolet Explorer (IUE) during the impacts of the fragments of comet D/Shoemaker-Levy 9 with Jupiter show far-UV emissions from the impact sites within a similar to 10 min time scale.
Liu, X, Rego, D, Fireman, G, Ajello, JM, Combi, M. R., Harris, W. M., Feldman, P. D., ben Jaffel, L., Liu, X., Strobel, DF, Jessup, K. L., Feldman, PD, Talavera, A., Livengood, T. A., Gladstone, GR, Budzien, SA, McGrath, MA, Clarke, J. T., ben Jaffel, L, Talavera, A, Prangé, R., Strobel, D. F., Ajello, J. M., Fireman, G., Vincent, M. B., Vincent, MB, Jessup, KL, Emerich, C., Miller, S., Hall, D. T., Combi, MR, Gladstone, G. R., McGrath, M. A., Woodney, L, Emerich, C, Rego, D., Budzien, S. A., Harris, WM, Miller, S, Clarke, JT, Ballester, GE, Livengood, TA, Ballester, G. E., Prangé, R, Woodney, L., Hall, DT   +45 more
core   +1 more source

An Optimized Freeze‐Dry Multimodal Workflow for Sequential Micro‐CT Imaging, Histology, and Molecular Profiling: A Use Case in Human Liver Fibrosis

Advanced Science, EarlyView.
Optimized freeze‐drying and eosin staining deliver artifact‐free micro‐CT images of liver tissue at near‐histological detail, then hand the same specimen back for sectioning, staining, and sequencing. Fibrotic volume distinguishes normal liver from cirrhosis, while preserved RNA reveals inflammatory gene upregulation—one biopsy, three dimensions, and a
Kristijan Skok, Laura Činč Ćurić, Jernej Vajda, Silvia Schauer, Martin Wagner, Rudolf Stauber, Carolin Lackner, Karl Kashofer, Markus Plass, Giovanny Rodriguez Blanco, Ian R. Wanless, Uroš Maver, Katrin Panzitt, Boštjan Vihar   +13 more
wiley   +1 more source

Near-Earth Asteroids as Possible Parent Bodies of Meteor Streams [PDF]

Учёные записки Казанского университета: Серия Естественные науки, 2016
The genetic relationship of meteor streams with near-Earth asteroids (NEAs) is being actively studied. A genetic link with the asteroid is possible only for streams in which meteoroids have the geocentric speed smaller than 50 km/s, thereby meaning the ...
M.G. Sokolova, M.V. Sergienko
doaj  

Systematic satellite observations of the impact of aerosols from passive volcanic degassing on local cloud properties [PDF]

Atmospheric Chemistry and Physics, 2014
The impact of volcanic emissions, especially from passive degassing and minor explosions, is a source of uncertainty in estimations of aerosol indirect effects.
S. K. Ebmeier, A. M. Sayer, R. G. Grainger, T. A. Mather, E. Carboni   +4 more
doaj   +1 more source

Krypton isotopes and noble gas abundances in the coma of comet 67P/Churyumov-Gerasimenko [PDF]

Science Advances, 2018
Noble gases in comet 67P/Churyumov-Gerasimenko indicate nonhomogenized protoplanetary disk material at its location of formation. The Rosetta Orbiter Spectrometer for Ion and Neutral Analysis mass spectrometer Double Focusing Mass Spectrometer on board ...
M. Rubin, K. Altwegg, H. Balsiger, A. Bar-Nun, J. Berthelier, C. Briois, U. Calmonte, M. Combi, J. de Keyser, B. Fiethe, S. Fuselier, S. Gasc, T. Gombosi, K. Hansen, E. Kopp, A. Korth, D. Laufer, L. Le Roy, U. Mall, B. Marty, O. Mousis, T. Owen, H. Rème, T. Sémon, C. Tzou, J. Waite, P. Wurz   +26 more
semanticscholar   +1 more source

Fabry's Comet and Barnard's Comet [PDF]

Nature, 1886
NOT having seen any mention of the rapid apparent growth of the tail of Fabry's comet, probably some of your readers are not aware to how great a length it extended. On April 26 occurred the first fine night after a very unusual series of overcast ones, and about 14h. G.M.T. I was surprised to see the tail reaching up to, or at least to within 1° of δ,
openaire   +2 more sources

PCLS (Precision Cut Lung Slices) as a putative model for genotoxicity testing by application of the comet assay

, 2022
S.2Actually, precision cut lung slices are under extensive investigation to serve as a model for acute inhalation toxicology. Slices can be employed as an ex-vivo/in-vitro model as alternative method in the context of REACH and the 3Rs. Moreover, this in
Sewald, K., Ritter, D., Knebel, J., Switalla, S.   +3 more
core   +1 more source

Macrophage RSAD2 Couples mtDNA Synthesis With a Self‐Amplifying Inflammatory Circuit to Orchestrate Tissue Repair

Advanced Science, EarlyView.
Macrophage RSAD2 dually regulates CMPK2—the rate‐limiting enzyme for mitochondrial DNA synthesis—by suppressing its ubiquitination and promoting its phosphorylation via Csnk2a2 recruitment. This amplifies mtDNA production, which simultaneously activates a cGAS‐STING‐IRF3‐RSAD2 feedforward loop and the NLRP3 inflammasome, driving a self‐sustaining ...
Haomiao Yuan, Shukui Du, Chunfei Li, Xinjie Li, Shuyang Mu, Anran Qu, Hengxu Yan, Chongchong Xu, Jinnong Yang, Jingkai Sun, Yijun Wang, Jiayang Xiao, Fuyuan Zhang, Linlin Wang, Tiegang Li, Rui Zhao, Dawei Guan   +16 more
wiley   +1 more source