Titlesort ascending By Description Created Last modified
Ruth Winkley 1924 4 Jul 2018 - 4:41:00am
Ruth S. Lynch 1922 3 Jul 2018 - 9:41:00pm
Russell L. Cecil 1925 4 Jul 2018 - 4:41:00am
Rudolph Nunnemacher 1936 4 Jul 2018 - 4:41:00am
Rudolf Höber 1929 4 Jul 2018 - 4:41:00am
Rudolf Carl Virchow (1821-1902) Megan Kearl Rudolf Carl Virchow lived in nineteenth century Prussia, now Germany, and proposed that omnis cellula e cellula, which translates to each cell comes from another cell, and which became and fundamental concept for cell theory. He helped found two fields, cellular pathology and comparative pathology, and he contributed to many others. Ultimately Virchow argued that disease is caused by changes in normal cells, also known as cellular pathology. 2012-03-17 4 Jul 2018 - 4:40:59am
Roy W. Miner 1923 4 Jul 2018 - 4:41:00am
Roy John Britten (1919-2012) Abhinav Mishra Roy John Britten studied DNA sequences in the US in the second half of the twentieth century, and he helped discover repetitive elements in DNA sequences. Additionally, Britten helped propose models and concepts of gene regulatory networks. Britten studied the organization of repetitive elements and, analyzing data from the Human Genome Project, he found that the repetitive elements in DNA segments do not code for proteins, enzymes, or cellular parts. Britten hypothesized that repetitive elements helped cause cells to 2014-10-24 4 Jul 2018 - 4:40:59am
Roy Chapman Andrews (1884-1960) Paige Madison Roy Chapman Andrews traveled the world studying fossils, from mammals to dinosaurs, during the first half of the twentieth century. Andrews worked and collected fossil specimens for the American Museum of Natural History (AMNH) in New York City, New York. Throughout his career, Andrews collected bones of many animal species, including a previously unknown species of a horned, herbivorous dinosaur, later named Proceratops andrewsi in his honor. Andrews published widely read narratives about his travels and field experiences, such as On the Trail of Ancient Man and Across Mongolian Plains. 2015-01-22 4 Jul 2018 - 4:40:59am
Roxana S. Ferris 1920s 6 Feb 2013 - 3:28:04am
Ross Granville Harrison (1870-1959) Kimberly A. Buettner A pioneer in experimental embryology, Ross Granville Harrison made numerous discoveries that advanced biology. One of the most significant was his adaptation of the hanging drop method from bacteriology to carry out the first tissue culture. This method allowed for further studies in embryology as well as experimental improvements in oncology, virology, genetics, and a number of other fields. 2007-09-01 4 Jul 2018 - 4:40:59am
Ross Granville Harrison 1921 4 Jul 2018 - 4:41:00am
Ross Granville Harrison 1925 21 Aug 2015 - 1:32:55am
Rosalyn Sussman Yalow (1921-2011) Jennifer R. Craer Rosalyn Sussman Yalow co-developed the radioimmunoassay (RIA), a method used to measure minute biological compounds that cause immune systems to produce antibodies. Yalow and research partner Solomon A. Berson developed the RIA in the early 1950s at the Bronx Veterans Administration (VA) Hospital, in New York City, New York. Yalow and Berson's methods expanded scientific research, particularly in the medical field, and contributed to medical diagnostics. For this achievement, Yalow received the Nobel Prize in Physiology or Medicine in 1977. 2013-09-10 4 Jul 2018 - 4:40:59am
Rosalind Elsie Franklin (1920-1958) Lindsey O'Connell Rosalind Elsie Franklin worked with X-ray crystallography at King's College London, UK, and she helped determine the helical structure of DNA in the early 1950s. Franklin's research helped establish molecular genetics, a field that investigates how heredity works on the molecular level. The discovery of the structure of DNA also made future research possible into the molecular basis of embryonic development, genetic disorders, and gene manipulation. 2013-11-17 4 Jul 2018 - 4:40:59am
Roger Wolcott Sperry (1913–1994) Dina A. Lienhard Roger Wolcott Sperry studied the function of the nervous system in the US during the twentieth century. He studied split-brain patterns in cats and humans that result from separating the two hemispheres of the brain by cutting the corpus callosum, the bridge between the two hemispheres of the brain. He found that separating the corpus callosum the two hemispheres of the brain could not communicate and they performed functions as if the other hemisphere did not 2018-02-26 30 Nov 2018 - 4:59:49am
Roger Arliner Young 1927-1929, 1931 or later 4 Jul 2018 - 4:41:00am
Roderick MacDonald 1930s?-1949? 4 Jul 2018 - 4:41:00am
Roberts Rugh Late 1920s-Early 1930s 21 Aug 2015 - 2:10:07am
Roberto Caldeyro-Barcia (1921–1996) Olivia Mandile Roberto Caldeyro-Barcia studied fetal health in Uruguay during the second half of the twentieth century. Caldeyro-Barcia developed Montevideo units, which are used to quantify intrauterine pressure, or the force of contractions during labor. Intrauterine pressure is a useful measure of the progression of labor and the health of a fetus. 2017-07-02 4 Jul 2018 - 4:40:58am
Robert William Hegner 1920s 6 Feb 2013 - 3:28:04am
Robert William Briggs (1911-1983) Adam R. Navis Robert William Briggs was a prolific developmental biologist. However, he is most identified with the first successful cloning of a frog by nuclear transplantation. His later studies focused on the problem of how genes influence development. 2007-11-08 4 Jul 2018 - 4:40:59am
Robert Weill 1928 4 Jul 2018 - 4:41:00am
Robert T. Hance 1925 4 Jul 2018 - 4:41:00am
Robert S. McEwen 1922 4 Jul 2018 - 4:41:00am
Robert Lanza (1956- ) Christopher Rojas During the twentieth and twenty-first centuries, Robert Paul Lanza studied embryonic stem cells, tissues, and endangered species as chief scientific officer of Advanced Cell Technology, Incorporated in Worcester, Massachusetts. Lanza's team cloned the endangered species of gaur Bos gaurus. Although the gaur did not survive long, Lanza successfully cloned another cow-like creature, called the banteng (Bos javanicus). Lanza also worked on cloning human embryos to harvest stem cells, which could be used to treat dieases. While 2015-02-11 4 Jul 2018 - 4:40:59am
Robert Huettner with Dr. & Mrs. William P. Procter Alfred F. (Alfred Francis) Huettner early 1930s 4 Jul 2018 - 4:41:00am
Robert Guthrie (1916–1995) Meilin Zhu Robert Guthrie developed a method to test infants for phenylketonuria (PKU) in the United States during the twentieth century. PKU is an inherited condition that causes an amino acid called phenylalanine to build to toxic levels in the blood. Untreated, PKU causes mental disabilities. Before Guthrie’s test, physicians rarely tested infants for PKU and struggled to diagnosis it. Guthrie’s test enabled newborns to be quickly and cheaply screened at birth and then treated for PKU if necessary, preventing irreversible neurological damage. 2017-02-23 4 Jul 2018 - 4:40:59am
Robert Geoffrey Edwards (1925-2013) Samuel Philbrick Robert Geoffrey Edwards worked with Patrick Christopher Steptoe to develop in-vitro fertilization (IVF) techniques during the 1960s and 1970s in the United Kingdom. Louise Brown, the world' s first "test-tube baby," was born as a result of Edwards and Steptoe's IVF techniques in 1978, and since then more than four million children have been born using IVF techniques. Publicity and controversy accompanied Edwards and Steptoe's work as conservative religious institutions expressed concern over the morality of the IVF procedure. 2011-06-20 4 Jul 2018 - 4:40:59am
Robert Evans Snodgrass 1932 21 Aug 2015 - 1:33:07am
Robert Chambers and Charles G. Rogers 1923 4 Jul 2018 - 4:41:00am
Robert Chambers 1922 4 Jul 2018 - 4:40:59am
Robert Chambers 1920s 6 Feb 2013 - 3:28:05am
Robert Chambers 1925 4 Jul 2018 - 4:41:00am
Robert B. Bowen 1922 4 Jul 2018 - 4:41:00am
Robert and Richard Huettner in front of locomotive Alfred F. (Alfred Francis) Huettner 1930 4 Jul 2018 - 4:41:00am
Robert Alan Good (1922-2003) Angel Lopez Robert Alan Good was an American physician and scientific researcher who explored the cellular mechanisms of immunity. His research and discoveries earned him the label of "father of modern immunology." Though his work in immunology is considered his greatest scientific achievement, Good is also well known for his work with tissue engineering. From his research on immunology, Good was able to perform the first successful allogeneic (donor and recipient are unrelated) bone marrow transplant. 2010-11-16 4 Jul 2018 - 4:40:59am
Rita Levi-Montalcini (1909-2012) Adam R. Navis Rita Levi-Montalcini is a Nobel Laureate recognized for her work in the discovery and characterization of nerve growth factor. Nerve growth factor (NGF) promotes the growth and maintenance of the nervous system in a developing system. The majority of her career has been devoted to investigating the many aspects of NGF. 2007-11-08 4 Jul 2018 - 4:40:59am
Richard Woltereck (1877-1944) B. R. Erick Peirson Richard Woltereck was a German zoologist and hydrobiologist who studied aquatic animals and extended the concept of Reaktionsnorm (norm of reaction) to the study of genetics. He also provided some of the first experimental evidence for the early twentieth-century embryological theory of heredity known as cytoplasmic inheritance. Through experiments on the water flea, Daphnia, Woltereck investigated whether variation produced by environmental impacts on development could play a role in heredity and evolution. 2012-05-13 4 Jul 2018 - 4:40:59am
Richard Weissenberg 1936 4 Jul 2018 - 4:41:00am
Richard Swann Lull 1925-09-28 6 Feb 2013 - 3:28:04am
Richard Doll (1912–2005) Phil Gaetano Richard Doll was an epidemiologist and public figure in the twentieth and early twenty-first centuries. Working primarily at the University of Oxford, in Oxford, England, Doll established a definitive correlation between cigarette smoking and lung cancer. Furthermore, Doll’s work helped legitimize epidemiology as a scientific discipline. Doll’s research also helped establish modern guidelines for oncological studies, as well as for contemporary and future research on the effect of smoking on pregnancy and fetal development. 2017-09-20 4 Jul 2018 - 4:40:59am
Richard A. Fennell 1932 4 Jul 2018 - 4:41:00am
Ricardo Hector Asch (1947- ) Hilary Gilson Ricardo Hector Asch was born 26 October 1947 in Buenos Aires, Argentina, to a lawyer and French professor, Bertha, and a doctor and professor of surgery, Miguel. Asch's middle-class family lived among the largest Jewish community in Latin America, where a majority of males were professionals. After his graduation from National College No. 3 Mariano Moreno in Buenos Aires, Asch worked as a teaching assistant in human reproduction and embryology at the University of Buenos Aires School of Medicine where he received his medical degree in 1971. 2009-06-10 4 Jul 2018 - 4:40:59am
Reminiscences of Dr. Edwin Grant Conklin (1863-1952), Biologist [2 of 2] Edwin Grant Conklin 1952-11-19 4 Jul 2018 - 4:40:59am
Reminiscences of Dr. Edwin Grant Conklin (1863-1952), Biologist [1 of 2] Edwin Grant Conklin 1952-11-19 4 Jul 2018 - 4:40:59am
Reinhard Dohrn 1932 6 Feb 2013 - 3:28:04am
Reid Hunt 1921 4 Jul 2018 - 4:41:00am
Regnier de Graaf (1641-1673) Ellen M. Dupont Regnier de Graaf, a Dutch physician and anatomist, was born 30 July 1641 in Schoonhoven, the Netherlands. Though he published papers on both pancreatic and male reproductive anatomy, he is best known for his discovery of the mature ovarian follicles as well as his contributions to the general body of knowledge surrounding the female mammalian reproductive organs. 2008-09-30 4 Jul 2018 - 4:40:59am
Reginald D. Manwell 1927-1928, 1930, 1935 4 Jul 2018 - 4:41:00am