Now showing items 1062-1066 of 1066

    • x-ray absorption analysis of MCG-6-30-15: discerning three kinematic systems 

      Holczer, T.; Behar, E.; Arav, N. (IOP Publishing Ltd., 2010-01)
      By analyzing the X-ray spectrum of MCG -6-30-15 obtained with the High Energy Transmission Grating (HETGS) spectrometer on board the Chandra observatory, we identify three kinematically distinct absorption systems; two ...
    • XMM-Newton RGS observation of the warm absorber in Mrk 279 

      Ebrero, J.; Constantini, E.; Kaastra, J. S.; Detmers, R. G.; Arav, N.; Kriss, G. A.; Korista, K. T.; Steenbrugge, K. C. (EDP Sciences, 2010-09/10)
      Context. The Seyfert 1 galaxy Mrk 279 was observed by XMM-Newton in November 2005 on three consecutive orbits, showing significant short-scale variability (average soft band variation in flux ~20%). The source is known to ...
    • XMM-Newton unveils the complex iron K alpha region of Mrk 279 

      Costantini, E.; Kaastra J. S.; Korista, K.; Ebrero, J.; Arav, N.; Kriss, G.; Steenbrugge, K. C. (EDP Sciences, 2010-03/04)
      We present the results of a similar to 160 ks-long XMM-Newton observation of the Seyfert 1 galaxy Mrk 279. The spectrum shows evidence of both broad and narrow emission features. The FeK alpha line may be equally well ...
    • You and Earth's Resources 

      Cairns, John (Ethics in Science and Environmental Politics, 2014-01-22)
      Earth is a finite planet with finite resources, so any decisions humankind makes in the beginning of the twenty-first century will affect the lives of not only the future generation but the current generation as well. The ...
    • Zampanolide and Dactylolide: Cytotoxic Tubulin-Assembly Agents and Promising Anticancer Leads 

      Chen, Qiao-Hong; Kingston, David G. I. (The Royal Society of Chemistry, 2014-06-19)
      Zampanolide is a marine natural macrolide and a recent addition to the family of microtubule-stabilizing cytotoxic agents. Zampanolide exhibits unique effects on tubulin assembly and is more potent than paclitaxel against ...