We also compute the distributions of times to establish infection as well as the distribution of times to extinction starting from both a single virion as well as from a single infected cell for both modes of virion production.”
“The Lanyu pig is an indigenous miniature pig breed on Lanyu Islet near Taiwan, with a mitochondrial DNA genetic lineage remote from Asian and European pig breeds. The unknown population genetic structure and increased inbreeding among the small population of conserved Lanyu
pigs is now of great Navitoclax concentration conservation concern. Additionally, the presence for more than a century of exotic pig breeds in Taiwan has made gene introgression from exotic pig breeds into Lanyu pigs very possible. The present study thus aimed to investigate BTK inhibitors nuclear genetic variation within the conserved Lanyu pigs and the phylogenetic relationship and possible genetic introgression between Lanyu and exotic pig breeds by determining the polymorphism of 19 microsatellite loci. In the neighbor-joining tree
constructed from 7 pig breeds based on Cavalli-Sforza and Edward chord genetic distances, 3 major clades were recognized, in which the Asian and European breeds were separately clustered into 2 clades with a 93.0 and 99.9% bootstrap confidence value, respectively. All individuals of the Lanyu breed formed a unique subclade within the Asian clade based on the distance of the proportion of shared alleles, -ln(ps), suggesting that the Lanyu breed possesses a unique nuclear genetic structure and that no nuclear gene
introgression from exotic breeds into the conserved Lanyu pigs has occurred in recent history. Fifteen of 19 microsatellite loci deviated from Hardy-Weinberg equilibrium (by Wright’s statistic), suggesting a significant loss of heterozygosity in the conserved population. The valuable nuclear genetic structure and phylogenetic information should assist future conservation and population management of Lanyu pigs.”
“An oft used approximation to predict quantum efficiency (QE) from bare metals or those with a low work function coating such as cesium is to assume that photo-excited electrons have not scattered prior to their LY3023414 price emission. Monte Carlo simulations are used to assess that approximation, and show that, while good for bare metals, for cesiated metals a photoexcited electron may undergo several scattering events and yet be emitted. Neglecting scattered electrons therefore underestimates QE. Emitted electrons that have undergone scattering before emission elongate the response time by giving rise to a long time tail, low energy contribution to the faster non-scattered emission, for which a model is developed. The theory is applied to study variations in QE as a function of wavelength measured from cesiated metal surfaces. The extension of the findings to semiconductor photocathodes is briefly discussed. (C) 2011 American Institute of Physics. [doi:10.1063/1.