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Articles 1681 - 1682 of 1682

Full-Text Articles in Molecular Genetics

Biochemical Properties Of Salmonella Potsdam Bacteriophage P4/2, Clyde L. Roggenkamp Sep 1966

Biochemical Properties Of Salmonella Potsdam Bacteriophage P4/2, Clyde L. Roggenkamp

Loma Linda University Electronic Theses, Dissertations & Projects

Over 90% recovery of phage P4/2 was realized with differential centrifugation concentration and purification, whereas only about 16% was recovered from the aqueous two-phase polymer - Genetron - ECTEOLA-cellulose column system. Purity of preparations was greatest with the density gradient centrifugation (A260 = 2.66 and A280 = 1.80 per 1012 plaque-forming units). With the chemical system of concentration and purification followed by an ECTEOLA anion exchange run, the A260 was 6.6 and the A280 was 4.3.

Three tests were employed to determine the configuration of P4/2 DNA: (1) a formalin denaturation test, (2) a thermal …


An Experimental Attempt To Modify The Sex Ratio Of Drosophila Melanogaster, Herman Weingrod May 1942

An Experimental Attempt To Modify The Sex Ratio Of Drosophila Melanogaster, Herman Weingrod

Bachelors’ Theses

Sex control has been defined as the science of producing male or female offspring at will by artificial means. Because of the far reaching consequences of such a technique, man has always had a strong desire to control the sex of his offspring. The ancient Egyptians attempted it by means of magic, while the old Hebrew Talmud offered suggestions for its practice based on practical experience. The problem as such forms part of the folklore and superstition of many ancient races and peoples.