Although one cannot completely discount the potential for laboratory error in strain propagation, the fact that the three European isolates are distinct from each another and were obtained at different times suggests that they are unlikely to have arisen from repeated laboratory contamination from a single stock of Schu S4.
Aliquots from two throat swab specimens collected during the 2008 2009 influenza were used for propagation of stocks by infection of MDCK cell cultures.
To prevent "the free propagation of the stock of those who are seriously afflicted by lunacy, feeble-mindedness, habitual criminality, and pauperism," he urged "stern compulsion," which might take the form of marriage restrictions or even sterilization.
The analysis activities subset consists of five parts: network input, output, stock, and flow analysis; network propagation event analysis; path length analysis; indirect effects analysis; and network connectivity analysis.
This process of propagation occurs in stocks of waiting passengers and in passenger flows, as well as in stocks and flows of vehicles.
The summary of studies to date suggests: nonlocal hatchery stocks consistently reproduce very poorly in the wild; hatchery stocks that use wild, local fish for captive propagation generally perform better than nonlocal stocks, but often worse than wild fish.
These growth plaques were then collected for further propagation and frozen stocks were prepared for subsequent cell splitting such that cells could be maintained at fewer than 12 subcultures.
The demographic processes that lead to species endangerment, as well as many management activities (e.g., stocking of nonindigenous fish, artificial propagation), can quickly alter the genetic and phenotypic attributes of wild populations (Reisenbichler and Rubin 1999; Stockwell et al. 2003; Blanchet et al. 2008).
Commercial production of sturgeons can decrease pressure on wild populations, by increasing the opportunities for artificial propagation to enhance natural stocks, and producing high value meat, and caviar (Ovissipour and Rasco 2011, Ovissipour and Rasco 2012).
This approach allows a propagation laboratory to develop propagation stock best suited to secondary metabolite production in the end-user facility.
