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James Alexander Thomson, affectionately known as Jamie Thomson, is an American developmental biologist whose pioneering work in isolating and…
PeopleThomson, James A., Dr.Stem CellsBiographyTheodor Boveri investigated the mechanisms of heredity. He developed the chromosomal theory of inheritance and the idea of chromosomal individuality…
PeopleHeredityBiographySidney Q. Cohlan studied birth defects in the US during the twentieth century. Cohlan helped to discover that if a pregnant woman ate too much…
Abnormalities, HumanRetinoidsVitamin AHypervitaminosisTetracyclineThe copper intrauterine device, or IUD, is a long-term, reversible contraceptive first introduced by Howard Tatum and Jamie Zipper in 1967. Health…
ContraceptivesCopper intrauterine contraceptivesDalkon Shield (Intrauterine contraceptive)Levonorgestrel intrauterine contraceptivesNorgestrelBenjamin Harrison Willier is considered one of the most versatile embryologists to have ever practiced in the US. His research spanned most of the…
TransplantationBiographyIn 1973, Ronald Ericsson developed the Ericsson method, which is a technique used to separate human male sperm cells by their genetic material.…
TechnologySex ChromosomesGonosomesSpermSpermatozoaThe one gene-one enzyme hypothesis, proposed by George Wells Beadle in the US in 1941, is the theory that each gene directly produces a single enzyme…
Beadle, George Wells, 1903-1989GeneticsGenetics, ExperimentalDrosophila melanogasterStafford Leak Warren studied nuclear medicine in the United States during the twentieth century. He used radiation to make images of the body for…
Warren, Stafford L. (Stafford Leak), 1896-1981RadiologyMedical radiologyRadiology--ResearchCancer--Interventional radiologyErnest Everett Just was an early twentieth century American experimental embryologist involved in research at the Marine Biological Laboratory (MBL)…
FertilizationBiographyInvertebratesThe International Treaty on Plant Genetic Resources for Food and Agriculture, referred to as the Plant Treaty, was approved on 3 November 2001 by…
LawGermplasm resources, PlantGermplasm resources, Plant--Law and legislationbiodiversityUnited Nations associations