Richard Laib

Learn More
The mutagenic properties of 2-methylpropene (MP) and 2-methyl-1,2- epoxypropane (MEP) were investigated in the Salmonella assay. A simple exposure system, consisting of gastight tissue culture flasks, was used. This method has the advantage that the volatile test chemical is present during the entire incubation period and that several concentrations of the(More)
Four structurally related aliphatic epoxides (1,2-epoxypropane, 1,2-epoxyisobutane, cis- and trans-2,3-epoxybutane) have been tested in the Salmonella/microsome assay, modified for volatile substances, using the strains TA1535 and TA100. The aim of the study was to evaluate the effect of methylation on the mutagenicity of 1,2-epoxypropane in this(More)
Drawing on experience with over 400 cases of significant cervical spine trauma, we have noted 12 helpful roentgen signs that may serve to direct the physician's attention to such serious underlying changes as fractures and dislocations. These 12 anatomic alterations may provide both direct and indirect evidence of traumatic lesions which are not clearly(More)
  • 1