18,587 articles
Karl Albert Hasselbalch
Karl Albert Hasselbalch (1874–1962) was a Danish physiologist and biochemist who created the Henderson–Hasselbalch equation in 1916, co-demonstrated the Bohr effect in 1904, and later led the Royal Danish Agricultural Society.
Karl Deisseroth
Karl Deisseroth is an American neuroscientist and practicing psychiatrist at Stanford University, known for creating optogenetics and hydrogel-tissue chemistry and for sharing the 2026 Nobel Prize in Physiology or Medicine.
Karl Drlica
Karl Drlica (born 1943) is an American molecular biologist at the Public Health Research Institute and Rutgers New Jersey Medical School in Newark, known for work on DNA gyrase, supercoiling, and fluoroquinolone resistance.
Karl Engelman
Karl Engelman was an American physician-scientist in clinical pharmacology and hypertension, known for his 1967 study showing para-chlorophenylalanine inhibits serotonin synthesis in carcinoid syndrome, and for pheochromocytoma drug tests.
Karl Ernst von Baer
Karl Ernst von Baer, also known as Karl Maksimovich Baer, was a Prussian-Estonian embryologist and naturalist (1792–1876) who discovered the mammalian ovum, described the notochord, and founded comparative embryology.
Karl Everhard Goebel
Karl Everhard Goebel, full name Karl Immanuel Eberhard Ritter von Goebel (1855–1932), was a German botanist and leading plant morphologist, professor of botany at Munich from 1891 to 1931.
Karl Friedrich Meyer
Karl Friedrich Meyer (1884–1974) was a Swiss-born American bacteriologist, virologist, and epidemiologist who spent his career at the University of California, setting canning-industry botulism standards and controlling psittacosis.
Karl Friston
Karl John Friston (born 1959) is a neuroscientist and psychiatrist at University College London, known for developing the neuroimaging methods SPM, VBM, and DCM, and for originating the free-energy principle.
Karl G. Nicholson
Karl G. Nicholson, also published as Karl Nicholson, is a British physician-scientist, Professor of Infectious Diseases at the University of Leicester, known for influenza antiviral and vaccine trials.
Karl Gottfried Paul Döhle
Karl Gottfried Paul Döhle (1855–1928) was a German pathologist and bacteriologist at the University of Kiel who described Döhle bodies in 1911 and gave his name to Heller–Döhle aortitis.
Karl H. Beyer Jr.
Karl H. Beyer Jr. (1914–1996) was an American pharmacologist who led the Merck Sharp & Dohme team that discovered probenecid and the thiazide diuretics, winning the 1974 Lasker Award.
Karl H. Weisgraber
Karl H. Weisgraber is a lipoprotein biochemist who defined the structure-function relationships of apolipoprotein E, whose E4 form is a major genetic risk factor for Alzheimer's disease.
Karl Habel
Karl Habel (1908–1981) was an American virologist and immunologist who spent nearly 30 years at the National Institutes of Health, developed an improved killed rabies vaccine, and was first to cultivate mumps virus in eggs.
Karl Henry Beyer, Jr.
Karl Henry Beyer, Jr. (1914–1996) was an American pharmacologist who led the discovery of probenecid and the thiazide diuretics, including chlorothiazide, and won the Albert Lasker Award in 1974.
Karl Herrup
Karl Herrup is a neurobiologist and professor at the University of Pittsburgh known for rejecting the amyloid hypothesis of Alzheimer's disease and for the cell-cycle hypothesis of neuronal death.
Karl J. Niklas
Karl J. Niklas (K. J. Niklas) is a plant evolutionist and paleobotanist, Liberty Hyde Bailey Professor emeritus at Cornell, known for quantitative studies of plant form, biomechanics, and allometry.
Karl Kandler
Karl Kandler is a German-trained neuroscientist and professor of neurobiology at the University of Pittsburgh who studies how auditory brain circuits are wired before hearing begins.
Karl Kleist
Karl Kleist (1879–1960) was a German psychiatrist, neurologist, and neuroanatomist, professor at Frankfurt from 1920, who first described several apraxias and founded the Wernicke–Kleist–Leonhard classification of endogenous psychoses.
Karl Landsteiner
Karl Landsteiner (1868–1943), Austrian-born physician and immunologist, discovered the ABO blood groups in 1900–1901 and the Rh factor with Wiener, enabling safe blood transfusion; Nobel Prize in Physiology or Medicine 1930, Rockefeller Institute.
Karl Lenggenhager
Karl Lenggenhager (1903–1989) was a Swiss surgeon, full professor, and director of the Surgical University Clinic at the Inselspital in Bern from 1942 to 1971, known for introducing low-dose heparin prophylaxis against postoperative thrombosis in 1935.
Karl Lenhard Rudolph
Karl Lenhard Rudolph (K. Lenhard Rudolph) is a German physician-scientist in stem cell and aging research, leading a group at the Leibniz Institute on Aging in Jena.
Karl Lennert
Karl Lennert (1921–2012) was a German pathologist at Kiel University who created the Kiel classification of non-Hodgkin lymphomas, the first built on immunological findings, and described Lennert lymphoma.
Karl Lisch
Karl Lisch (1907–1999) was an Austrian ophthalmologist who led the eye department at the Wörgl hospital and gave his name to the Lisch nodule, an iris lesion that remains a diagnostic criterion for neurofibromatosis type 1.
Karl M. Johnson
Karl M. Johnson (died October 2023) was an American physician and virologist who isolated Machupo virus, co-identified Hantaan virus, and led the 1976 commission that named Ebola virus.
Karl Maramorosch
Karl Maramorosch (1915–2016) was an American plant pathologist and virologist who showed that some plant pathogens multiply in insect vectors and pioneered insect cell culture, winning the 1980 Wolf Prize in Agriculture.
Karl Mark Ansel
Karl Mark Ansel, publishing as K. Mark Ansel, is an immunologist and professor at the University of California, San Francisco who studies how RNA regulation shapes T cell responses.
Karl Matter
Karl Matter is a Swiss-trained cell biologist, professor at the UCL Institute of Ophthalmology since 2001, known for work on tight junctions and epithelial protein sorting.
Karl Meyer (biochemist)
Karl Meyer (1899–1990) was a German-born American biochemist who spent most of his career at Columbia University, isolated and named hyaluronic acid in 1934, and shared the 1956 Lasker Award.
Karl O. Stetter
Karl O. Stetter is a German microbiologist, born 1941, and professor emeritus at Regensburg who coined "hyperthermophile" and cultivated over 1500 strains of heat-loving microbes.
Karl Oskar Medin
Karl Oskar Medin (1847–1927) was a Swedish pediatrician and professor at the Karolinska Institutet who first described poliomyelitis as an epidemic disease, from the 1887 Stockholm outbreak.