Word: borenfreund
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...essence of heredity-the delicately complex deoxyribonucleic acid known as DNA-has been extracted virtually intact from human sperm for the first time by Doctors Ellen Borenfreund and Aaron Bendich. The "almost impossible" feat promises to shed new light on the transmission of hereditary traits in mammals and on the origin of genetic abnormalities. After experiments with the sperm of fish and fowl, rabbits and bulls, the Manhattan researchers carefully washed the human sperm to rid it of enzymes, then treated the DNA tough protein topcoat with a chemical that freed the 400,000 chainlike DNA molecules for examination...
...Ellen Borenfreund, Herbert S. Rosenkranz and Aaron Bendich said tritium now offers a new and improved method for the radioactive "tagging" or labelling of the genetic material of cells and viruses so scientists can trace its activity, sight unseen...
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