Two antibiotics isolated from a culture MA-2465 were identified as aureothin and labilomycin, the chemical structures of which had been reported previously. It was also concluded that mycolutein and pulvomycin isolated as antibiotics in 1955 and 1957 respectively are also identical with aureothin and labilomycin. A cursory study of MA-2465 indicates that it is distinctly different from the cult...

13aHlcroft J Skrimhirs A, ( issoi J, Harvard-WX(inOs(, Rcynlolds F. i'eople who dclihcratley poisoni or injliore themselvcs: their problem's and their coniiacts with helpinig agcncies. Psvsc/ioMcd 1977;7:2X9-303. 2 Hawton K, Giolldacre M. Hospital admissions for ad\crse ellfects of neditcinal agents rmninlv sci poisonings amonig adoilccenits in thi (Oxford region. BrjP7scharr l982:141: 166-70. ...

e o When errors are clearly visible, the blockiness of some artifacts distinguishes them from th riginal image content, suggesting a way of reducing these artifacts. Presumably, the human viewer k e identifies the artifacts by assuming the image does not have 8-pixel by 8-pixel block features. Bloc dge variance, the sum of squared differences between adjacent block edge pixels, is one simple s ...