Post-preparative Treatment Research Articles

Electron microscopy of nucleic acids: The effect of different post-treatments on contour-length measurements

Abstract The contour-length of the DNA plasmid Colicin E1 was measured when the specimens were given three commonly used treatments, after the molecules were mounted onto nitrocellulose (Collodion) supports. Significant variations in contour-length and standard deviation were observed and related to the specimen post-preparative treatments of the specimen.

Photothermoelectric effect in CdS:Na films deposited from a chemical bath

Films of CdS and CdS:Na were formed by the chemical bath deposition technique and were given a post-preparation treatment under a vacuum of 10 -5 Torr. The photothermoelectric effect was investigated in these films. The effects of temperature and the intensity of excitation by white light on the thermoelectric power α, n and μ have been investigated. An attempt has been made to discover the type of scattering involved in the photoconducting process.