RESUMO
The use of rectangular-element random phase plates to generate a line focus is described. Photographic records of the resultant focus are presented and compared with theoretical calculations made by using an interference code. Good agreement is found. The code is used to investigate possible design modifications to produce a more square-topped line focus. A 12-ps Raman-shifted KrF (lambda = 0.268 microm) laser pulse is used in combination with such plates to produce a laser plasma. The plasma conditions are extensively characterized by using time-resolved extreme UV spectroscopy and a pinhole camera, and their suitability for x-ray laser applications is discussed.
RESUMO
A novel and simple XUV imaging technique using a laser-produced plasma source is described. A spatial resolution of better than 0.8 mum is demonstrated.
RESUMO
Human rotaviruses containing rearranged genomes were found to package up to 1,800 additional base pairs in virus particles. The viruses compared were indistinguishable in respect of their particle diameters and their apparent S values. Particles containing rearranged genomes were found to be of a higher density than rotavirus particles containing a standard genome as determined by equilibrium density ultracentrifugation. The increase in density was directly proportional to the number of additionally packaged base pairs.
