Hershey, A.D.


Hershey, A.D.

▪ American biologist
in full  Alfred Day Hershey  
born Dec. 4, 1908, Owosso, Mich., U.S.
died May 22, 1997, Syosset, N.Y.

      American biologist who, along with Max Delbrück (Delbrück, Max) and Salvador Luria (Luria, Salvador), won the Nobel Prize for Physiology or Medicine in 1969. The prize was given for research done on bacteriophages (bacteriophage) (viruses that infect bacteria).

      Hershey earned a doctorate in chemistry from Michigan State College (now Michigan State University) in 1934 and then took a position at Washington University School of Medicine in St. Louis, Mo. He joined the staff of the Genetics Research Unit of the Carnegie Institution of Washington in 1950 after giving up his position as professor at Washington University. In 1963 he became director of the Genetics Research Unit.

      Hershey, Delbrück, and Luria began exchanging information on phage research in the early 1940s. In 1945 Hershey and Luria, working independently, demonstrated the occurrence of spontaneous mutation in both the bacteriophages and the host. The next year, Hershey and Delbrück independently discovered the occurrence of genetic (genetics) recombination in phages—i.e., that different strains of phages inhabiting the same bacterial cell can exchange or combine genetic material. Delbrück incorrectly interpreted his results as specifically induced mutations, but Hershey and one of his students proved that the results they had obtained were recombinations by showing that the genetic processes in question correspond with the crossing-over of parts of similar chromosomes observed in cells of higher organisms.

      Hershey is most noted for the so-called blender experiment that he performed with Martha Chase in 1952. By showing that phage DNA is the principal component entering the host cell during infection, Hershey proved that DNA, rather than protein, is the genetic material of the phage.

* * *


Universalium. 2010.

Look at other dictionaries:

  • Hershey´s — Saltar a navegación, búsqueda Compañía Hershey The Hershey Bar Fundación 9 de febrero de 1894 Sede …   Wikipedia Español

  • Hershey — steht für: Orte in den Vereinigten Staaten: Hershey (Kalifornien) Hershey (Nebraska) Hershey (Pennsylvania) Sonstiges: die Hershey Bahn (Kuba) die Hershey Company das Hershey Chase Experiment Hershey s Chocolate World Personen: Alfred Day Hershey …   Deutsch Wikipedia

  • Hershey — Hershey, NE U.S. village in Nebraska Population (2000): 572 Housing Units (2000): 249 Land area (2000): 0.500693 sq. miles (1.296788 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.500693 sq. miles (1.296788… …   StarDict's U.S. Gazetteer Places

  • Hershey —   [ həːʃɪ], Alfred Day, amerikanischer Molekularbiologe, * Owosso (Michigan) 4. 12. 1908, ✝ Syosset (N. Y.) 22 5. 1997. Hershey lehrte von 1934 bis 1950 als Bakteriologe an der Washington University in Saint Louis (Missouri). Anschließend… …   Universal-Lexikon

  • Hershey, NE — U.S. village in Nebraska Population (2000): 572 Housing Units (2000): 249 Land area (2000): 0.500693 sq. miles (1.296788 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.500693 sq. miles (1.296788 sq. km) FIPS… …   StarDict's U.S. Gazetteer Places

  • Hershey, PA — U.S. Census Designated Place in Pennsylvania Population (2000): 12771 Housing Units (2000): 5887 Land area (2000): 14.405785 sq. miles (37.310809 sq. km) Water area (2000): 0.047337 sq. miles (0.122603 sq. km) Total area (2000): 14.453122 sq.… …   StarDict's U.S. Gazetteer Places

  • Hershey — Alfred Day …   Scientists

  • Hershey — Hershey, Alfred D …   Enciclopedia Universal

  • Hershey — (izg. hèrši), Alfred Day (1908 1997) DEFINICIJA američki biolog, genetičar i virolog, Nobelova nagrada za medicinu 1969 (s M. Delbrückom i S. Luriom) …   Hrvatski jezični portal

  • Hershey's — Compañía Hershey Fundación 9 de febrero de 1894 Sede …   Wikipedia Español


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.