Francis J. Ryan

Q: What Schools Are Affiliated With Francis J. Ryan

Francis J. Ryan is affiliated with the following schools: University of California, Berkeley, Stanford University, Columbia University

Francis J. Ryan's AcademicInfluence.com Rankings

Francis J. Ryan

Biology

#4305

Historical Rank

Genetics

#467

Historical Rank

Zoology

#543

Historical Rank

biology Degrees

Download Badge

Biology

Francis J. Ryan's Degrees

Masters Zoology University of California, Berkeley

Why Is Francis J. Ryan Influential?

(Suggest an Edit or Addition)

According to Wikipedia, Francis Joseph Ryan was an American zoologist. He was professor and chair of Columbia University's department of zoology. Biography Ryan was born on February 1, 1916, in Brooklyn, New York. He received his B.A. from Columbia University in 1937 and his Ph.D. in 1941. He then joined the faculty and eventually became assistant professor, associate professor, full professor and department head. He was a mentor of future Nobel Prize winner Joshua Lederberg, who credited Ryan for "taking a callow underclassman from Washington Heights, brash and argumentative as precocious students often are, and turned [him] into a scientist."

(See a Problem?)

Francis J. Ryan's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

THE TUBE METHOD OF MEASURING THE GROWTH RATE OF NEUROSPORA (1943) (392)
Periodic selection in Escherichia coli. (1951) (311)
Selective mechanisms in bacteria. (1951) (156)
Spontaneous Mutation in Non-Dividing Bacteria. (1955) (123)
Elective Production of Thymine-less Mutants (1960) (82)
Bacterial mutation in a stationary phase and the question of cell turnover. (1959) (81)
Reverse-mutation and adaptation in leucineless Neurospora. (1946) (59)
A colicin produced by cells that are sensitive to it. (1955) (47)
Nuclear segregation and the growth of clones of spontaneous mutants of bacteria. (1954) (41)
Mutations during the Growth of Biochemical Mutants of Escherichia Coli. (1949) (41)
Temperature change and the subsequent rate of development (1941) (37)
BACK-MUTATION AND ADAPTATION OF NUTRITIONAL MUTANTS (1946) (35)
The Proportions of Nuclear Types in Neurospora Heterocaryons as Determined by Plating Conidia. (1953) (34)
THE GERMINATION OF CONIDIA FROM BIOCHEMICAL MUTANTS OF NEUROSPORA (1948) (29)
Adaptation to use lactose in Escherichia coli. (1952) (28)
Spontaneous mutation in spheroplasts of Escherichia coli. (1963) (28)
THE DIRECT ENUMERATION OF SPONTANEOUS AND INDUCED MUTATIONS IN BACTERIA (1955) (27)
The Stimulus for Maturation and for Ovulation of the Frog's Egg (1940) (26)
THE CONSEQUENCES OF MUTATION DURING THE GROWTH OF BIOCHEMICAL MUTANTS OF ESCHERICHIA COLI IV (1949) (24)
THE DELAYED APPEARANCE OF MUTANTS IN BACTERIAL CULTURES. (1954) (22)
The biosynthesis of pantothenic acid. (1945) (22)
Attempt to Reproduce Some of Moewus' Experiments on Chlamydomonas and Polytoma (1955) (21)
Effect of temperature on natural mutation in Escherichia coli. (1959) (20)
Replication of Deoxyribonucleic Acid in Non-dividing Bacteria (1961) (20)
Nuclear segregation and the growth of clones of bacterial mutants induced by ultraviolet light. (1954) (20)
Mutations Involving the Requirement of Uracil in Clostridium. (1946) (16)
The consequences of mutation during the growth of biochemical mutants of Escherichia coli; the pattern of adaptation of histidineless cultures. (1948) (15)
Distribution of Numbers of Mutant Bacteria in Replicate Cultures (1952) (15)
On the Stability of Nutritional Mutants of Bacteria. (1948) (13)
Phenotypic (Phenomic) Lag in Bacteria (1955) (13)
The four‐carbon respiratory system and growth of the mold neurospora (1944) (12)
Reverse-Mutation and Adaptation in Leucineless Neurospora. (1946) (12)
DIRECTED MUTATION IN A SYNCHRONIZED BACTERIAL POPULATION. (1963) (11)
THE TIME-TEMPERATURE RELATION OF DIFFERENT STAGES OF DEVELOPMENT (1941) (10)
The Consequences of Mutation during the Growth of Biochemical Mutants of Escherichia coli: I. The Pattern of Adaptation of Histidineless Cultures. (1948) (10)
The consequences of mutation during the growth of biochemical mutants of Escherichia coli; the mechanism of inhibition of histidine-independent bacteria by histidineless bacteria. (1949) (8)
The application of Neurospora to bioassay. (1946) (7)
The use of antibiotics, vitamin analogues and other compounds in experimental gas gangrene. (1946) (7)
Crossing-Over and Second Division Segregation in Fungi (1943) (7)
THE CONSEQUENCES OF MUTATION DURING THE GROWTH OF BIOCHEMICAL MUTANTS OF ESCHERICHIA COLI III (1949) (7)
The necessary involvement of both complementary strands of DNA in the specification of messenger RNA (1962) (6)
The Growth of Clostridium septicum and Its Inhibition (1947) (5)
On the Inability of Antibodies to Induce Mutations in Bacteria (1953) (5)
THE CONSEQUENCES OF MUTATION DURING THE GROWTH OF BIOCHEMICAL MUTANTS OF ESCHERICHIA COLI II (1949) (5)
UNIQUE SENSITIVITY OF A PANTOTHENICLESS MUTANT OF NEUROSPORA TO CONSTITUENTS OF THE GROWTH MEDIUM (1953) (5)
The Relation of the Bacterial Production of Ammonia Gas to the Growth of Other Microorganisms (1947) (5)
AN UNIDENTIFIED GROWTH FACTOR FOR A GAS GANGRENE CLOSTRIDIUM1 (1944) (4)
Mutations Involving the Production of Conidia and the Requirement for Leucine in a Mutant of Neurospora. (1948) (4)
The Consequences of Mutation during the Growth of Biochemical Mutants of Escherichia coli (1948) (4)
Competitive Suppression of Prototrophs (1953) (4)
SECTION OF BIOLOGY: NATURAL MUTATION IN NONDIVIDING BACTERIA* (1957) (3)
The consequences of mutation during the growth of biochemical mutants of Escherichia coli; the inhibition of histidine-independent bacteria by histidineless bacteria in unshaken cultures. (1949) (3)
CONTRIBUTIONS FROM MICROBIOLOGY TO THE CONCEPT OF THE GENE AND ALLELISM (1956) (2)
The Importance of B. O. Dodge's Work for the Genetics of Fungi (1961) (2)
Cell Heredity: An Analysis of the Mechanisms of Heredity at the Cellular Level (1962) (2)
Analogs of leucine and the utilization of L-leucine by Neurospora. (1952) (2)
The effect of tip clearance on an axial flow fan (1955) (1)
Bacterial Genetics. Werner Braun. Philadelphia-London: Saunders, 1953. 238 pp. Illus. $6.50 (1954) (1)
[Mutations in micro-organisms]. (1950) (0)
Incisive Selection: Sexuality and the Genetics of Bacteria . François Jacob and Elie L. Wollman. Academic Press, New York, 1961. xv + 374 pp. Illus. $10. (1962) (0)
Natural mutation in nondividing bacteria. (1957) (0)
Adaptation in Micro-Organisms. (1954) (0)
International Congress of Genetics Travel Grants (1962) (0)
Mutation in micro-organisms. (1950) (0)
Microbial Variation: V. D. Timakov, editor. (Translated from the Russian by G. H. Beale) 1st edition, 202 pages, illustrated. New York, N. Y., Pergamon Press, 1959. $6.50 (1960) (0)
Bacterial Genetics. Werner Braun. Philadelphia-London: Saunders, 1953. 238 pp. Illus. $6.50 (1954) (0)
Cell heredity [by] Ruth Sager [and] Francis J. Ryan. (1961) (0)
[Importance of mutants in the study of fermentation metabolism]. (1950) (0)
[Mechanism of bacterial adaptation. I. Hereditary and non-hereditary adaptation]. (1958) (0)
EVOLUTION AS OBSERVED IN MICROORGANISMS (1955) (0)
[Mechanism of bacterial adaptation. II. Role of mutation and selection]. (1959) (0)
Applicability of approaches of microbial genetics to characterization of mammalian cells. (1962) (0)
Interactions During the Growth of Mutating Populations of Bacteria (1947) (0)
Attempt to Reproduce Some of Moewus' Experiments on Chlamydomonas and Polytoma (1955) (0)
Mutation in microorganisms. (1950) (0)
Sexuality and the Genetics of Bacteria. François Jacob and Elie L. Wollman. Academic Press, New York, 1961. xv + 374 pp. Illus. $10 (1962) (0)
Travel Grants for XIth International Congress of Genetics (1962) (0)

This paper list is powered by the following services:

Other Resources About Francis J. Ryan

en.wikipedia.org

What Schools Are Affiliated With Francis J. Ryan?

Francis J. Ryan is affiliated with the following schools:

Francis J. Ryan's Academic­Influence.com Rankings

Francis J. Ryan's Degrees

Why Is Francis J. Ryan Influential?

Francis J. Ryan's Published Works

Published Works

Other Resources About Francis J. Ryan

What Schools Are Affiliated With Francis J. Ryan?

Francis J. Ryan's AcademicInfluence.com Rankings