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Van Mulders SE Stassen C Daenen L Devreese B Siewers V van Eijsden RG Nielsen J Delvaux FR Willaert R 《Astrobiology》2011,11(1):45-55
This study investigates the effects of microgravity on colony growth and the morphological transition from single cells to short invasive filaments in the model eukaryotic organism Saccharomyces cerevisiae. Two-dimensional spreading of the yeast colonies grown on semi-solid agar medium was reduced under microgravity in the Σ1278b laboratory strain but not in the CMBSESA1 industrial strain. This was supported by the Σ1278b proteome map under microgravity conditions, which revealed upregulation of proteins linked to anaerobic conditions. The Σ1278b strain showed a reduced invasive growth in the center of the yeast colony. Bud scar distribution was slightly affected, with a switch toward more random budding. Together, microgravity conditions disturb spatially programmed budding patterns and generate strain-dependent growth differences in yeast colonies on semi-solid medium. 相似文献
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Peter W. A. Roming Thomas E. Kennedy Keith O. Mason John A. Nousek Lindy Ahr Richard E. Bingham Patrick S. Broos Mary J. Carter Barry K. Hancock Howard E. Huckle S D. Hunsberger Hajime Kawakami Ronnie Killough T Scott Koch Michael K. Mclelland Kelly Smith Philip J. Smith Juan Carlos Soto Patricia T. Boyd Alice A. Breeveld Stephen T. Holland Mariya Ivanushkina Michael S. Pryzby Martin D. Still Joseph Stock 《Space Science Reviews》2005,120(3-4):95-142
The Ultra-Violet/Optical Telescope (UVOT) is one of three instruments flying aboard the Swift Gamma-ray Observatory. It is designed to capture the early (∼1 min) UV and optical photons from the afterglow of gamma-ray
bursts in the 170–600 nm band as well as long term observations of these afterglows. This is accomplished through the use
of UV and optical broadband filters and grisms. The UVOT has a modified Ritchey–Chrétien design with micro-channel plate intensified
charged-coupled device detectors that record the arrival time of individual photons and provide sub-arcsecond positioning
of sources. We discuss some of the science to be pursued by the UVOT and the overall design of the instrument. 相似文献
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