Robert N. Leamnson

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Envelope glycoprotein of avian tumor virus is linked by disulfide bonds in a structure that we have designated VGP to stand for viral glycoprotein. VGP appears to contain one molecule of gp85 and one of gp37. Under nonreducing conditions, VGP is the only glycoprotein component that is stable in the presence of ionic detergent, although in the presence of(More)
A method for obtaining large quantities of defective interfering (DI) rabies virus particles that fulfill all the criteria delineated by Huang and Baltimore (1970) is described. The purified rabies DI virion was found to be much shorter (60 to 80 nm) than the complete virion (180 nm) and to have a viral genome of about half the size of normal rabies RNA but(More)
This reflective essay suggests certain precepts that should be effective in the design of instruction and its evaluation, particularly if advanced or experimental technology is involved. The arguments are based on the assumption that human learning is a biological process that, when reduced to its essentials, is the product of evolution and does not change(More)
We have been characterizing molecular clones of two subgroup E avian retroviruses (NTRE-2 and NY203RAV-60) that produce different proliferative diseases after inoculation into susceptable K28 chickens. Both viruses arose by recombination between exogenous and endogenous viral genomes. To further characterize regions of these viruses that are important for(More)
This special issue of The Journal of International Forum of Educational Technology & Society comprises an eclectic group of essays and studies that, collectively, investigates newer educational technologies in the light of learning as a biological process. All of the contributors would appear to share a common belief; learning is the result of something(More)
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