The aim of this study is performing free vibration analysis segmented Timoshenko beams on two parameter elastic foundation by using the transfer matrix method (TMM). Pasternak model which has an incompressible shear layer vertical elements attached to Winkler springs was considered. formulations are based closed-form solutions equations motion were obtained. natural frequencies calculated equat...

various basidiomycetes and deuteromycetes, grown in liquid and solid culture media, were compared for their laccase-producing ability and for the inducing effect of soil and agricultural residues on laccase production. laccase activity in extracts of all solid media was higher than that of the liquid media. in liquid cultures, fungal laccase activity in ex-tracts of pea (pisum sativum) straw-tr...

DNA is generally considered to be chemically rather inert, but self-cleaving DNA molecules have recently been isolated from in vitro selection experiments; their properties advance the idea that, like RNA, DNA can serve as both a catalyst and an information storage medium.

ALFRED E. CORNEBISE, Typhus and doughboys. The American Polish Typhus Relief Expedition 1919-21, Newark, NJ, University of Delaware Press; Toronto and London, Associated University Presses, 1982, 8vo, pp. 188, illus., £16.60. To preserve his sanity during the Russian Civil War, so Pasternak tells us, Dr Zhivago threw himself into the care of victims of typhus, which in many parts of Eastern Eur...