Results 21 to 30 of about 229,895 (346)

Effects of Titanium Dioxide Nanoparticles on Porcine Prepubertal Sertoli Cells: An “In Vitro” Study

open access: yesFrontiers in Endocrinology, 2022
The increasing use of nanomaterials in a variety of industrial, commercial, medical products, and their environmental spreading has raised concerns regarding their potential toxicity on human health.
Francesca Mancuso   +21 more
doaj   +1 more source

Spitzer Space Telescope Observations of the Nucleus of Comet 103P/Hartley 2 [PDF]

open access: yes, 2009
We have used the Spitzer Space Telescope InfraRed Spectrograph (IRS) 22-μm peakup array to observe thermal emission from the nucleus and trail of comet 103P/Hartley 2, the target of NASA’s Deep Impact Extended Investigation (DIXI). The comet was observed
A'Hearn, M. F.   +9 more
core   +2 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

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

Chandra's Close Encounter with the Disintegrating Comets 73P/2006 (Schwassmann--Wachmann--3) Fragment B and C/1999 S4 (LINEAR) [PDF]

open access: yes, 2008
On May 23, 2006 we used the ACIS-S instrument on the Chandra X-ray Observatory (CXO) to study the X-ray emission from the B fragment of comet 73P/2006 (Schwassmann-Wachmann 3) (73P/B).
Arnaud   +29 more
core   +1 more source

Effects of the Planar Galactic Tides and Stellar Mass on Comet Cloud Dynamics

open access: yes, 2009
We report the first results of a research program to explore the sensitivity of the orbits of Oort cloud comets to changes in the strength of the Galactic tides in the plane of the disk and also to changes in the mass of the host star.
Gonzalez, Guillermo   +2 more
core   +1 more source

How satellite InSAR has grown from opportunistic science to routine monitoring over the last decade

open access: yesNature Communications, 2020
In the past decade, a new generation of radar satellites have revolutionised our ability to measure Earth’s surface deformation globally and with unprecedented resolution.
Juliet Biggs, Tim J. Wright
doaj   +1 more source

Follow-up observations of Comet 17P/Holmes after its extreme outburst in brightness end of October 2007

open access: yes, 2009
We present follow-up observations of comet 17/P Holmes after its extreme outburst in brightness, which occurred end of October 2007. We obtained 58 V-band images of the comet between October 2007 and February 2008, using the Cassegrain-Teleskop-Kamera ...
Barnard   +9 more
core   +1 more source

The unusual volatile composition of the Halley-type comet 8P/Tuttle: Addressing the existence of an Inner Oort Cloud

open access: yes, 2008
We measured organic volatiles (CH4, CH3OH, C2H6, H2CO), CO, and water in comet 8P/Tuttle, a comet from the Oort cloud reservoir now in a short-period Halley-type orbit.
B. P. Bonev   +26 more
core   +1 more source

Home - About - Disclaimer - Privacy