Results 21 to 30 of about 9,305 (228)

THERMAL SHADOWS AND COMPOSITIONAL STRUCTURE IN COMET NUCLEI [PDF]

The Astrophysical Journal, 2011
We use a fully 3-dimensional thermal evolution model to examine the effects of a non-uniform surface albedo on the subsurface thermal structure of comets. Surface albedo markings cast "thermal shadows", with strong lateral thermal gradients. Corresponding compositional gradients can be strong, especially if the crystallization of amorphous water ice is
Guilbert-Lepoutre, A., Jewitt, D.
openaire   +2 more sources

Finite difference time domain simulation of radar wave propagation through comet nuclei dielectric models

, 2008
The 90 MHz radar-wave experiment, Comet Nucleus Sounding Experiment by Radiowave Transmission (CONSERT), on board the Rosetta mission (ESA, 2004) is expected to probe the nucleus of the comet 67P/Churyumov-Gerasimenko (67P/C-G) to reveal information on ...
Carley, Ruth A., Heggy, Essam
core   +2 more sources

Assessment of protein and DNA polymorphisms in corn (Zea mays) under the effect of non-ionizing electromagnetic radiation

Caryologia, 2023
Many reports highlight biological responses of crop plants after non-ionizing electromagnetic radiation (EMR) exposure based on the phenotypic and physiological levels.
Ekram Abdelhaliem, Hanan M. Abdalla, Ahmed A. Bolbol, Rania S. Shehata   +3 more
doaj   +1 more source

Ice, Ice, Maybe? Investigating 46P/Wirtanen’s Inner Coma for Icy Grains

The Planetary Science Journal, 2023
The release of volatiles from comets is usually from direct sublimation of ices on the nucleus, but for very or hyperactive comets other sources have to be considered to account for the total production rates.
Theodore Kareta, John W. Noonan, Walter M. Harris, Alessondra Springmann   +3 more
doaj   +1 more source

Toxoplasma gondii infection can induce retinal DNA damage:an experimental study

International Journal of Ophthalmology, 2014
AIM: To detect whether Toxoplasma gondii (T. gondii) infection of mice can induce retinal DNA damage.METHODS: A total of 20 laboratory-bred male Swiss albino mice were used and divided into four groups:control group (non-infected animals); T ...
Nagwa Mostafa El-Sayed, Eman Mohamed Aly
doaj   +1 more source

Thermal model of water and CO activity of Comet C/1995 O1 (Hale-Bopp)

, 2011
An investigation of the activity of Comet C/1995 O1 (Hale-Bopp) with a thermophysical nucleus model that does not rely on the existence of amorphous ice is presented.
H.U. Keller, U. Motschmann, N. Gortsas, Kührt, Ekkehard, Kührt, E., Gortsas, N., Keller, H.U., E. Kührt, Motschmann, U.   +8 more
core   +1 more source

The CoPhyLab comet-simulation chamber [PDF]

, 2021
The Comet Physics Laboratory (CoPhyLab) is an international research program to study the physical properties of cometary analog materials under simulated space conditions.
C. Kreuzig, E. Kaufmann, Lethuillier, A., Otto, K., Tiefenbacher, P., Tiefenbacher, P,, Blum, J.,, J. Blum, Sierks, H., M. Schweighart, B. Gundlach, Haack, D., Schweighart, M., Tiefenbacher, P.,, E. Kührt, Feller, C., Kaufmann, E., K. Otto, D. Bischoff, Pommerol, A., Bischoff, D.,, Güttler, C.,, Lethuillier, A.,, G. Kargl, Kreuzig, C.,, Molinski, N. S.,, A. Lethuillier, Kührt, E.,, Haack, D.,, Bischoff, D., Knollenberg, J., Kreuzig, C., Gundlach, B.,, T. Gilke, Kührt, E., Otto, K.,, Kaufmann, Erika,, A. Pommerol, H. Sierks, Schweighaert, M., P. Tiefenbacher, Sierks, H.,, Hänni, N.,, C. Feller, Pommerol, A.,, Capelo, H.,, Gilke, T., Macher, W., Gilke, T.,, W. Macher, Molinski, N.S., Hänni, N., N. S. Molinski, Capelo, H., H. Capelo, C. Güttler, Blum, J., Molinski, N., Kargl, G.,, Kargl, G., Schweighart, M.,, Gundlach, B., Macher, W.,, Molinski, N. S., D. Haack, N. Hänni, Feller, C.,, Knollenberg, J.,, Güttler, C., J. Knollenberg   +69 more
core   +1 more source

Dual PARP/Tankyrase Inhibition Enhances Antitumor Efficacy in PTEN-Deficient Endometrial Cancer. [PDF]

J Cell Mol Med
ABSTRACT Endometrial cancer (EC) incidence continues to rise, underscoring the need for effective therapies beyond BRCA‐mutant disease. Although PTEN loss, a frequent alteration in EC, has been implicated in impaired homologous recombination and increased sensitivity to PARP inhibitors, responses to PARP inhibitor monotherapy remain variable and are ...
Kang SW, Eum H, Lee JY, Lee MS, Kim YM, Kim TW, Lee SW.   +6 more
europepmc   +2 more sources

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, John K. Harmon, Micael C. Nolan, Steven J. Ostro   +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