NACA Technical Notes

Note presenting an investigation of the intergranular corrosion of high-purity aluminum in hydrochloric acid studied as a function of iron content, heat treatment, and acid composition under conditions where the rate of intergranular penetration was of the order of 1 millimeter per week

Adenine auxotrophic heterozygosity in Candida krusei

Candida krusei CK18 carries heterozygosity for a recessive adenine biosynthesis allele, as it can be induced by UV irradiation to form adenine mutants at high frequency. The resultant mutants were characterized with the phenotype of red colony and residual growth on minimal media. The majority of the descendant prototrophic segregates were capable of continuous segregation to adenine mutants, suggesting gene conversion as one possible mechanism for the occurrence of the adenine auxotroph in the isolate.link_to_subscribed_fulltex