The peptidoglycan of bacterial cell walls is biosynthesized in a complex reaction cycle in which lipid intermediates serve as carriers of activated sugar fragments (1). The lipid intermediates (e.g., lipid-P-P-disaccharide-pentapeptide) have been identified as derivatives of an acyclic isoprenoid alcohol which has a chain length of 11 isoprene units (2, 3). In the cyclic reaction, the disacchar...

In January of that year George D Lundberg, Editor of the Journal of the American Medical Association [JAMA], was sacked by the American Medical Association (Anderson 1999). Some five months later, Jerome P Kassirer, Editor of the New England Journal of Medicine, left the Journal when his contract with the Massachusetts Medical Society, the journal’s owners, was not renewed (Smith 1999). At the ...

The rainfall and runoff relationship becomes an intriguing issue as urbanization continues to evolve worldwide. In this paper, we developed a simulation model based on the soil conservation service curve number (SCS-CN) method to analyze the rainfall-runoff relationship in Guangzhou, a rapid growing metropolitan area in southern China. The SCS-CN method was initially developed by the Natural Re...

We report on the metal distribution in the intracluster medium around the radio galaxy 4C+55.16 (z = 0.24) observed with the Chandra X-ray Observatory. The radial metallicity profile shows a dramatic change at 10 arcsec (∼ 50 kpc) in radius from half solar to twice solar at inner radii. Also found was a plume-like feature located at∼ 3 arcsec to the south-west of the centre of the galaxy, which...