Results 31 to 40 of about 3,411,943 (277)

Problems of the dynamics and the origin of comets [PDF]

Astronomical School’s Report, 2000
We consider some problems concerning the dynamics of comets far from the Sun. In this connection an estimate for the different hypotheses of the comet origin is given.
openaire   +2 more sources

Genotoxicity of nitroso compounds and sodium dichromate in a model combining organ cultures of human nasal epithelia and the comet assay [PDF]

, 2001
Genotoxic effects of xenobiotics are a possible step in tumor initiation in the mucosa of the upper aerodigestive tract. Using the comet assay, detecting genotoxicity in human tissue has been restricted to single incubations in vitro, but in vivo most ...
Bergner, Albrecht, Kastenbauer, Ernst R., Gamarra, Fernando, Kleinsasser, Norbert H., Harréus, Ulrich A., Huber, Rudolf M., Wallner, Barbara C., Juchhoff, Jutta   +7 more
core   +1 more source

Spectrometer Testing: Dark frame evaluation of StellarNet Black Comet spectrometer [PDF]

, 2017
This document presents an evaluation of the dark current present in a StellarNet Black Comet spectrometer for potential applications in a number of research projects within the Sensors and Instrumentation Research Group and the Institute of Materials and
Smith, DR, Hobson, PR
core   +4 more sources

InSAR Time Series Analysis of L-Band Data for Understanding Tropical Peatland Degradation and Restoration

Remote Sensing, 2019
In this study, satellite radar observations are employed to reveal spatiotemporal changes in ground surface height of peatlands that have, and have not, undergone restoration in Central Kalimantan, Indonesia.
Zhiwei Zhou, Zhenhong Li, Susan Waldron, Akiko Tanaka   +3 more
doaj   +1 more source

Cometary Dynamics—Formation and Evolution of the Oort Cloud

Astronomy
In this review, the formation of the Oort Cloud is illuminated from several aspects. One is the history of the subject with an outline of the fundamental discoveries by Öpik, Oort and Hills. It is argued that the basic reason for judging Oort as the real
Hans Rickman
doaj   +1 more source

Comparative Evaluation of Genotoxicity of Captan in Amphibian Larvae (Xenopus laevis and Pleurodeles waltl) Using the Comet Assay and the Micronucleus Test [PDF]

, 2006
Captan (N-trichloromethylthio-4-cyclohexene-1,2-dicarboximide) is a fungicide used to inhibit the growth of many types of fungi on plants used as foodstuffs.
Gauthier, Laury, Devaux, Alain, Gauthier, L., Mouchet, F., Ferrier, V., Mouchet, Florence, Ferrier, Vincent, Mailhes, Corinne, Devaux, A.   +8 more
core   +1 more source

Determination of double- and single-stranded DNA breaks in bovine sperm is predictive of their fertilizing capacity

Journal of Animal Science and Biotechnology, 2022
Background The analysis of chromatin integrity has become an important determinant of sperm quality. In frozen-thawed bovine sperm, neither the sequence of post-thaw injury events nor the dynamics of different types of sperm DNA breaks are well ...
Jordi Ribas-Maynou, Ariadna Delgado-Bermúdez, Yentel Mateo-Otero, Estel Viñolas, Carlos O. Hidalgo, W. Steven Ward, Marc Yeste   +6 more
doaj   +1 more source

TESS-CoMET

, 2018
R script to calculate CoMET function in ...
Guillermo Ortí (69121), Ortí, Guillermo, Rafael Rivero-Vega (6001235), Davis, Aaron, Rivero-Vega, Rafael, Emanuell Duarte Ribeiro (6001232), Aaron Davis (205288), Ricardo Betancur-R (245801), Duarte Ribeiro, Emanuell, Betancur-R, Ricardo   +9 more
core   +1 more source

Single Cell Analysis of Human RAD18-Dependent DNA Post-Replication Repair by Alkaline Bromodeoxyuridine Comet Assay [PDF]

, 2013
Damage to DNA can block replication progression resulting in gaps in the newly synthesized DNA. Cells utilize a number of post-replication repair (PRR) mechanisms such as the RAD18 controlled translesion synthesis or template switching to overcome the ...
Himabindu Gali, Mórocz Mónika, Downes C. Stephen, Raskó István, Haracska Lajos, Downes, C. Stephen, Gali Himabindu, C Stephen Downes, Mórocz, Mónika, Lajos Haracska, Mónika Mórocz, Gali, Himabindu, Raskó, István, Haracska, Lajos, István Raskó   +14 more
core   +2 more sources

Realistic Models for the Comet Dynamical Environment [PDF]

AIAA/AAS Astrodynamics Specialist Conference and Exhibit, 2006
An outgassing jet model is presented in support of spacecraft navigation for future missions to comets. The outgassing jet is modelled as an emission cone while the comet is modelled as a uniform density triaxial ellipsoid. The comet’s motion about the Sun is included in the model.
Byram, Sharyl Marie, Scheeres, Daniel J., Combi, Michael R.   +2 more
openaire   +1 more source