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Biomedical subjects

C Gray

Publications and source records attributed to C Gray.

At least 325 records · Page 18Linked to original sources
PubMed1977

Aluminum oxide cleanup of feed grade fats for residues of dieldrin.

A method is described for the analysis of dieldrin in feed grade fats. Fat samples in petroleum ether are cleaned up by column chromatography on 10% deactivated aluminum oxide followed by Florisil and analyzed by electron capture gas chromatography. Fourteen laboratories tested the method for determining dieldrin in naturally contaminated feed grade fats. Recoveries averaged greater than 90% with a coefficient of variation of 13% (0.54 ppm +/- 0.07), indicating that the method is sufficiently reproducible to be used by different laboratories for detecting dieldrin in feed grade fats.

Aluminum↗
PubMed1975

Nucleotide sequence of an RNA polymerase binding site from the DNA of bacteriophage fd.

The primary structure of a strong RNA polymerase binding site in the replicative form DNA of phage fd has been determined by direct DNA sequencing. It is: (see article). The molecule contains regions with 2-fold symmetry and sequence homologies to promoter regions from other DNAs. The startpoint of transcription is located in the center of the binding site.

Base Sequence↗