PubMed Health⌕ Search

Biomedical subjects

R L Steere

Publications and source records attributed to R L Steere.

5 recordsLinked to original sources
PubMed1977

Separation and infectivity of circular and linear forms of potato spindle tuber viroid.

Potato spindle tuber viroid can be separated into two fractions by polyacrylamide gelelectrophoresis in the presence of formamide and urea. One fraction contains predominantly circular molecules; the second fraction contains almost exclusively linear molecules. The purity of the fractions was estimated by electron microscopy of formaldehyde-denatured molecules. The length distributions of denatured circular and linear molecules were determined. Both circular and linear molecules were found to be infectious.

Electrophoresis, Polyacrylamide Gel↗
PubMed1977

A resistance monitor with power cut-off for automatic regulation of shadow and support film thickness in freeze-etching and related techniques.

A resistance monitor with sensors and automatic power cut-off has been developed to control the thickness of Pt-C shadow and C replica films in freeze-etching and related techniques. The monitor and sensors, in conjunction with newly modified evaporators, should considerably reduce the amount of C and Pt required and should prove useful in other applications employing vacuum evaporation of thin films of Pt, C, or other conducting materials.

Cell Membrane↗