443 research outputs found
A semi-analytical light curve model and its application to type IIP supernovae
The aim of this work is to present a semi-analytical light curve modeling
code which can be used for estimating physical properties of core collapse
supernovae (SNe) in a quick and efficient way. To verify our code we fit light
curves of Type II SNe and compare our best parameter estimates to those from
hydrodynamical calculations. For this analysis we use the quasi-bolometric
light curves of five different Type IIP supernovae. In each case we get
appropriate results for the initial pre-supernova parameters. We conclude that
this semi-analytical light curve model is useful to get approximate physical
properties of Type II SNe without using time-consuming numerical hydrodynamic
simulations.Comment: accepted for publication in Astronomy \& Astrophysics; corrected
Fig.2, 3,
Extinction of Xist Improves Cloning
Mammalian cloning by somatic cell nuclear transfer is a notoriously inefficient process with a low birth rate. Recently in Science, Inoue et al. (2010) report that somatic cell nuclear transfer fails to regulate Xist expression from the X chromosome
Increased Resistance of Vasculogenic Mimicry-Forming Uveal Melanoma Cells against Cytotoxic Agents in Three-Dimensional Cultures
Coverage of Rickia wasmannii (Ascomycota: Laboulbeniales) on Myrmica scabrinodis (Formicidae)
Quick cytogenetic screening of breeding bulls using flow cytometric sperm DNA histogram analysis
The aim of the present study was to test the FXCycle PI/RNase kit for routine DNA analyses in order to detect breeding bulls and/or insemination doses carrying cytogenetic aberrations. In a series of experiments we first established basic DNA histogram parameters of cytogenetically healthy breeding bulls by measuring the intraspecific genome size variation of three animals, then we compared the histogram profiles of bulls carrying cytogenetic defects to the baseline values. With the exception of one case the test was able to identify bulls with cytogenetic defects. Therefore, we conclude that the assay could be incorporated into the laboratory routine where flow cytometry is applied for semen quality control.Peer reviewe
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