Now showing items 848-867 of 1026

    • Samuel Randall Detwiler (1890-1957) 

      Navis, Adam R. (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2012-05-10)
      Samuel Randall Detwiler was an embryologist who studied neural development in embryos and vertebrate retinas. He discovered evidence for the relationship between somites and spinal ganglia, that transplanted limbs can be ...
    • San Diego Zoo Institute for Conservation Research 

      Love, Karen
      The San Diego Zoo Institute for Conservation Research (SDZICR) in San Diego, California, is a research organization that works to generate, use, and share information for the conservation of wildlife and their habitats. ...
    • Santiago Felipe Ramon y Cajal (1852-1934) 

      Taddeo, Sarah (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2014-06-05)
      Santiago Felipe Ramon y Cajal investigated brains in the nineteenth and twentieth centuries in Spain. He identified and individuated many components of the brain, including the neuron and the axon. He used chick embryos ...
    • “Screening for Breast Cancer with Mammography” (2013), by Peter Gøtzsche and Karsten Jørgensen 

      Lienhard, Dina A.
      Screening for Breast Cancer with Mammography is a Cochrane systematic review originally published by Peter Gøtzsche and Karsten Jørgensen in 2001 and updated multiple times by 2013. In the 2013 article, the authors discuss ...
    • "Screening for Congenital Hypothyroidism" (1991), by Delbert A. Fisher 

      Craer, Jennifer R. (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-12-31)
      In his 1991 article Screening for Congenital Hypothyroidism, Delbert A. Fisher in the US reported on the implementation and impact of mass neonatal screening programs for congenital hypothyroidism (CH) from the early 1970s ...
    • Seed Banking 1979-1994 

      Baranski, Marci (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2014-01-28)
      In the early twentieth century, scientists and agriculturalists collected plants in greenhouses, botanical gardens, and fields. Seed collection efforts in the twentieth century coincided with the professionalization of ...
    • Seed Collection and Plant Genetic Diversity, 1900-1979 

      Baranski, Marci (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-11-01)
      Farmers have long relied on genetic diversity to breed new crops, but in the early 1900s scientists began to study the importance of plant genetic diversity for agriculture. Scientists realized that seed crops could be ...
    • "Selective Growth Stimulating Effects of Mouse Sarcoma on the Sensory and Sympathetic Nervous System of the Chick Embryo" (1951), by Rita Levi-Montalcini and Viktor Hamburger 

      Navis, Adam R. (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2012-05-10)
      In "Selective Growth Stimulating Effects of Mouse Sarcoma on the Sensory and Sympathetic Nervous System of the Chick Embryo," Rita Levi-Montalcini and Viktor Hamburger explored the effects of two nerve growth stimulating ...
    • Sergio Cereceda Stone (1942- ) 

      Gilson, Hilary (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2012-05-10)
      Sergio Cereceda Stone was born 16 April 1942 in the coastal city of Valparaiso, Chile. Stone's mother Luz was a housewife and caretaker for Sergio and his younger brother Lionel; his father Sergio served among the country's ...
    • Serial Cultivation of Human Diploid Cells in the Lab (1958–1961) by Leonard Hayflick and Paul S. Moorhead 

      Ross, Christian H.
      From 1958 to 1961, Leonard Hayflick and Paul Moorhead in the US developed a way in the laboratory to cultivate strains of human cells with complete sets of chromosomes. Previously, scientists could not sustain cell cultures ...
    • "A Series of Normal Stages in the Development of the Chick Embryo" (1951), by Viktor Hamburger and Howard L. Hamilton 

      Navis, Adam R. (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2012-05-10)
      The developmental stages of the chick embryo were examined by Viktor Hamburger and Howard L. Hamilton in "A Series of Normal Stages in the Development of the Chick Embryo," published in the Journal of Morphology in 1951. ...
    • The Sex Education of Children: A Book for Parents (1931), by Mary Ware Dennett 

      Malladi, Lakshmeeramya
      Mary Coffin Ware Dennett, a supporter of sex education for children in the US in the early twentieth century, wrote The Sex Education of Children: A Book for Parents as a resource for parents teaching their children about ...
    • Sex in a Cold Climate (1998) 

      Darby, Alexis
      In 1998, Testimony Films released the documentary Sex in a Cold Climate, which reported the true stories of four survivors from the Magdalene asylums in Ireland in the twentieth century. Magdalene asylums, also called ...
    • “Sex Limited Inheritance in Drosophila” (1910), by Thomas Hunt Morgan 

      Gleason, Kevin
      In 1910, Thomas Hunt Morgan performed an experiment at Columbia University, in New York City, New York, that helped identify the role chromosomes play in heredity. That year, Morgan was breeding Drosophila, or fruit flies. ...
    • The Sex Side of Life (1919) by Mary Ware Dennett 

      Malladi, Lakshmeeramya
      Mary Ware Dennett, an activist in the US for birth control and sex education in the early twentieth century, wrote an educational pamphlet in 1915 called “The Sex Side of Life, and it was published in 1919. The pamphlet ...
    • Sex-determining Region Y in Mammals 

      Cox, Troy (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-12-31)
      The Sex-determining Region Y (Sry in mammals but SRY in humans) is a gene found on Y chromosomes that leads to the development of male phenotypes, such as testes. The Sry gene, located on the short branch of the Y chromosome, ...
    • "Sheep Cloned by Nuclear Transfer from a Cultured Cell Line" (1996), by Keith Campbell, Jim McWhir, William Ritchie, and Ian Wilmut 

      Bartlett, Zane (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2014-09-19)
      In 1995 and 1996, researchers at the Roslin Institute in Edinburgh, Scotland, cloned mammals for the first time. Keith Campbell, Jim McWhir, William Ritchie, and Ian Wilmut cloned two sheep, Megan and Morag, using sheep ...
    • Sheldon Clark Reed (1910-2003) 

      Possehl, Cassidy
      Sheldon Clark Reed helped establish the profession of genetic counseling in the US during the twentieth century. In 1947 Reed coined the term genetic counseling to describe the interaction of a doctor explaining to a patient ...
    • Sheppard-Towner Maternity and Infancy Protection Act (1921) 

      Madgett, Katherine
      In November 1921, US Congress passed the National Maternity and Infancy Protection Act, also called the Sheppard-Towner Act. The Act provided federal funds to states to establish programs to educate people about prenatal ...
    • The Shettles Method of Sex Selection 

      Blight, Alysse
      In the 1960s in the United States Landrum B. Shettles developed the Shettles method, which is a procedure for couples to use prior to and during an intercourse to increase their chances of conceiving a fetus of their desired ...