42,772 articles
Johann Wilhelm Hittorf
Johann Wilhelm Hittorf (1824–1914) was a German physicist at the University of Münster who discovered cathode rays in 1869 and established the transport numbers of ion migration in electrolysis.
Johanna Blake
Johanna M. Blake is an American research hydrologist and geochemist at the USGS New Mexico Water Science Center in Albuquerque, who received a 2025 Presidential Early Career Award.
Johannes A. Lercher
Johannes A. Lercher is an Austrian catalysis scientist who directs the Institute for Integrated Catalysis at Pacific Northwest National Laboratory and holds a chemistry chair at the Technische Universität München.
Johannes C. Mol
Johannes C. Mol is a Dutch chemist at the University of Amsterdam whose 1968 isotope-labeling experiments on olefin metathesis are cited by the Nobel Committee.
Johannes Diderik van der Waals
Johannes Diderik van der Waals was a Dutch physicist who won the 1910 Nobel Prize in Physics for his equation of state for gases and liquids.
Johannes Geiss
Johannes Geiss (1926–2020) was a German-Swiss experimental physicist at the University of Bern, best known for leading the Apollo Solar Wind Composition experiment on the Moon.
Johannes Hjelmslev
Johannes Hjelmslev, born Johannes Trolle Petersen, was a Danish mathematician, professor at the University of Copenhagen from 1917, known for his 1907 axiomatic reconstruction of plane geometry.
Johannes Kepler
Johannes Kepler was a German astronomer and mathematician, 1571 to 1630, whose three laws of planetary motion, drawn from Tycho Brahe's observations, later underpinned Newton's theory of gravitation.
Johannes Martin Bijvoet
Johannes Martin Bijvoet (1892–1980) was a Dutch crystallographer who in 1951 determined the first absolute configuration of an organic molecule by X-ray diffraction, using anomalous scattering.
Johannes Mollerup
Johannes Mollerup (1872–1937) was a Danish mathematician, professor at the Technical University of Denmark from 1916, known for the Bohr–Mollerup theorem and the Danish analysis textbook he wrote with Harald Bohr.
Johannes Nicolaus Brønsted
Johannes Nicolaus Brønsted was a Danish physical chemist and professor at Copenhagen who defined acids as proton donors and bases as proton acceptors in 1923.
Johannes Rydberg
Johannes Robert Rydberg (1854–1919) was a Swedish physicist at Lund University whose 1890 formula for spectral series, with the Rydberg constant, underlies Bohr's 1913 atomic model.
Johannes Stark
Johannes Stark (1874–1957) was a German experimental physicist who won the 1919 Nobel Prize in Physics for discovering the splitting of spectral lines in electric fields, the Stark effect.
Johannes V. Barth
Johannes V. Barth, born 1962, is a German surface physicist who has held the chair of surface and interface physics at the Technical University of Munich since 2006.
Johannes van der Corput
Johannes Gualtherus van der Corput (1890–1975) was a Dutch analytic number theorist whose method of exponential sums transformed number theory, whose 1935 sequence became the prototype for quasi-Monte Carlo methods, and who founded Amsterdam's Mathematisch Centrum.
Johannes van Laar
Johannes Jacobus van Laar (1860–1938) was a Dutch mathematical chemist who, with Bakhuis Roozeboom, founded phase theory and derived the van Laar equation for activity coefficients.
Johannes Walther
Johannes Walther (1860–1937) was a German geologist and paleontologist who formulated Walther's Law of correlation of facies, founded modern sediment research and biogeology, and served as president of the Leopoldina academy from 1924 to 1931.
Johannes Wislicenus
Johannes Adolf Wislicenus (1835–1902) was a German chemist and founder of stereochemistry who first synthesized lactic acid in 1862 and later led the chemical institute at Leipzig.
Johannite
Johannite is a rare, radioactive copper uranyl sulfate mineral forming bright green crystals in oxidized uranium deposits, first found in 1819 at Jáchymov, Czech Republic.
John A. Cherry
John A. Cherry is a Canadian hydrogeologist who helped found the science of contaminant hydrogeology, co-authored the 1979 textbook Groundwater, and won the 2020 Stockholm Water Prize.
John A. Gladysz
John A. Gladysz (J. A. Gladysz), born 1952, is an American organometallic chemist and Distinguished Professor at Texas A&M University, known for molecular gyroscopes and recoverable fluorous catalysts.
John A. Orcutt
John A. Orcutt, also published as J. A. Orcutt, is an American marine geophysicist and Distinguished Professor at the Scripps Institution of Oceanography who discovered magma chambers beneath mid-ocean ridges.
John A. Parrish
John A. Parrish is an American physician-scientist and dermatologist, Edward Wigglesworth Professor Emeritus at Harvard Medical School, who led dermatology at Massachusetts General Hospital and founded the Wellman Center for Photomedicine.
John A. Peacock
John A. Peacock is a cosmologist and Professor of Cosmology at the University of Edinburgh, known for leading the 2dF Galaxy Redshift Survey and co-inventing the halo model.
John A. Pickett
John A. Pickett, born 1945, is a British chemical ecologist at Cardiff University known for pioneering semiochemical pest control and the push-pull cropping system used across East Africa.
John A. Pople
Sir John Anthony Pople (1925–2004) was a British theoretical chemist who developed the computational methods and GAUSSIAN program that made quantum chemistry practical, winning the 1998 Nobel Prize in Chemistry.
John A. Porco
John A. Porco Jr. is an organic chemist at Boston University, the Samour Family Professor of Chemistry since 2018, known for total synthesis of natural products and dearomatization strategies.
John A. Pyle
John A. Pyle is a British atmospheric chemist at Cambridge known for modeling ozone depletion by CFCs and co-chairing the Montreal Protocol's Scientific Assessment Panel from 2008 to 2023.
John A. Ripmeester
John A. Ripmeester is a Canadian materials chemist at the National Research Council Canada in Ottawa, known for the structural chemistry of clathrate hydrates and solid-state NMR methods.
John Adam Fleming
John Adam Fleming (1877–1956) was an American geophysicist who directed the Carnegie Institution's Department of Terrestrial Magnetism from 1935 to 1946 and led the World Magnetic Survey.