Results 41 to 50 of about 288,189 (359)

The Peculiar Volatile Composition of CO-dominated Comet C/2016 R2 (PanSTARRS) [PDF]

open access: yesAstronomical Journal, 2019
Comet C/2016 R2 (PanSTARRS) has a peculiar volatile composition, with CO being the dominant volatile, as opposed to H2O, and one of the largest N2/CO ratios ever observed in a comet.
A. McKay   +16 more
semanticscholar   +1 more source

Catalogue of emission lines in the spectrum of the comet C/2004 Q2 (Machholz) on 15 January, 2004

open access: yesВісник Астрономічної школи, 2013
Idetified the emission lines in the spectrum of comet C/2004 Q2 (MACHHOLZ), obtained in the region λλ4760÷6580ÅÅ on 15 January, 2005 with the 2-meter telescope of Shamakha AO of NAS of Azerbaijan.
Kh. M. Mikailov   +3 more
doaj   +1 more source

The COMET toolkit for composing customizable genetic programs in mammalian cells

open access: yesNature Communications, 2020
Engineering mammalian cells to carry out sophisticated and customizable genetic programs requires a toolkit of multiple orthogonal and well-characterized transcription factors (TFs).
Patrick S. Donahue   +5 more
semanticscholar   +1 more source

The way of K.I. Churyumov to science

open access: yesВісник Астрономічної школи, 2016
A brief biography and details about the scientific work of the famous scientist, doctor of physical and mathematical sciences, corresponding member of the National Academy of Sciences of Ukraine, professor Klim Ivanovich Churyumov are presented.
V. M. Efimenko
doaj   +1 more source

A Study of the 1668 Deungrok, Records of Celestial Phenomena from the Joseon Dynasty [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2012
This paper will introduce and overview in general the Seongbyeon Deungrok issued by the Gwansang-gam, the Astronomical Board in the Joseon Dynasty of Korea. All the Chinese characters in the 1668 Seongbyeon Deungrok was deciphered at first and these were
Il-Seong Nha, Yoon Hong, Nami Ahn
doaj   +1 more source

Nickel oxide nanoparticles exposure as a risk factor for male infertility: “In vitro” effects on porcine pre-pubertal Sertoli cells

open access: yesFrontiers in Endocrinology, 2023
Lately, nickel oxide nanoparticles (NiO NPs) have been employed in different industrial and biomedical fields. Several studies have reported that NiO NPs may affect the development of reproductive organs inducing oxidative stress and, resulting in male ...
Iva Arato   +16 more
doaj   +1 more source

InSAR slip rate determination on the Altyn Tagh Fault, northern Tibet, in the presence of topographically correlated atmospheric delays

open access: yesGeophysical Research Letters, 2008
The interseismic strain across the Altyn Tagh Fault at 85°E has been measured using 59 interferograms from 26 ERS‐1/2 SAR acquisitions on a single track for the period 1993–2000.
J. R. Elliott   +3 more
doaj   +1 more source

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

open access: yesNature, 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   +3 more sources

The ethanolic extract of Gomphrena celosioides is not carcinogenic and has antigenotoxic effects and chemopreventive Properties [PDF]

open access: yesBrazilian Journal of Biology
Gomphrena celosioides, popularly known as perpétua, perpétua brava, bachelor´s button and prostate globe amarahth, is used for the treatment of urinary tract disorders, kidney stones, for skin diseases, infectious diseases, gastrointestinal and ...
M. M. M. D. Levenhagen   +7 more
doaj   +1 more source

Pre-discovery Activity of New Interstellar Comet 2I/Borisov beyond 5 au [PDF]

open access: yesAstronomical Journal, 2019
Comet 2I/Borisov, the first unambiguous interstellar comet ever found, was discovered in 2019 August at ∼3 au from the Sun on its inbound leg. No pre-discovery detection beyond 3 au has yet been reported, mostly due to the comet’s proximity to the Sun as
Q. Ye 叶   +17 more
semanticscholar   +1 more source

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