Physical world and mathematics

Dimethyl phthalate

Dimethyl phthalate (DMP) is the dimethyl ester of phthalic acid, a colorless oily liquid used as a plasticizer and solvent and once widely as an insect repellent.

Dimethyl sulfate

Dimethyl sulfate (DMS), the dimethyl ester of sulfuric acid, is a colorless, oily liquid used industrially as a methylating agent in chemical manufacture, classified as a probable human carcinogen.

Dimethyl sulfide (DMS) is a colorless, volatile organosulfur liquid with a disagreeable odor, produced abundantly by marine organisms, which guides foraging seabirds and seals and is used industrially as a gas odorant.

Dimethyl sulfoxide

Dimethyl sulfoxide, or DMSO, is a colorless organosulfur compound used as a polar aprotic solvent, as the standard cryoprotectant for frozen cells, and in organic synthesis.

Dimethyl terephthalate

Dimethyl terephthalate (DMT) is the dimethyl ester of terephthalic acid, an aromatic compound with formula C₁₀H₁₀O₄ used principally to make polyethylene terephthalate (PET), and a product of PET methanolysis recycling.

Dimethylacetamide

Dimethylacetamide (DMAc), systematically N,N-dimethylacetamide, is a high-boiling, water-miscible polar aprotic solvent used to dissolve polymers in fiber and membrane production and pharmaceutical synthesis, and is being restricted in the European Union for toxicity.

Dimethylamine

Dimethylamine, also known as N-methylmethanamine, is a colorless, flammable secondary amine with the formula (CH3)2NH, produced on a large scale as a precursor to solvents such as dimethylformamide.

Dimethylaniline

Dimethylaniline, most commonly N,N-dimethylaniline, is a toxic tertiary aromatic amine, a yellow to brown oily liquid used mainly as an intermediate in dye and vanillin manufacture.

Dimethylarginine

Dimethylarginine refers to two isomers, ADMA and SDMA, non-proteinogenic amino acids formed from methylated arginine in proteins; ADMA inhibits nitric oxide synthase and both are cardiovascular risk markers.

Dimethylethanolamine

Dimethylethanolamine (DMEA), also called dimethylaminoethanol or Deanol, is a flammable organic compound made from dimethylamine and ethylene oxide, used mainly as a polyurethane foam catalyst and neutralizing amine for water-based coatings.

Dimethylformamide

Dimethylformamide (DMF), also known as N,N-dimethylmethanamide, is a colorless, water-miscible organic amide with formula HCON(CH3)2, used at large industrial scale as a polar aprotic solvent.

Dimethylglyoxime

Dimethylglyoxime (dmgH2), also called diacetyl dioxime, is a white crystalline dioxime widely used in analytical chemistry as a chelating reagent that forms an insoluble scarlet precipitate with nickel.

Dimethylmercury

Dimethylmercury is a colorless, volatile organomercury compound and potent neurotoxin that permeates laboratory gloves almost instantly, historically used as an NMR reference standard and linked to several lab fatalities.

Dimethylurea

Dimethylurea, formally 1,3-dimethylurea, is a symmetrical urea derivative with one methyl group on each of urea's two nitrogen atoms, giving formula C₃H₈N₂O. It is a colorless crystalline solid used to synthesize caffeine and in textile finishing.

Oct 10, 2026

Dimitar Sasselov

Dimitar Sasselov is a Harvard astronomer who studies exoplanets and the origins of life, directing Harvard's Origins of Life Initiative and serving on NASA's Kepler mission.

Dimitri A. Sverjensky

Dimitri A. Sverjensky is an Australian-born theoretical geochemist, professor at Johns Hopkins University since 1984, known for the Deep Earth Water model and mineral-water interface research.

Dimitri Basov

Dimitri Basov, also known as Dmitri N. Basov, is a condensed matter physicist who studies quantum materials with infrared light and chairs physics at Columbia University.

Dimitri Mihalas

Dimitri Mihalas (1939–2013) was an American astrophysicist and National Academy of Sciences member known for his work on stellar atmospheres, radiation transport, and radiation hydrodynamics.

Oct 10, 2026

Dimitrie Pompeiu

Dimitrie Pompeiu (1873–1954) was a Romanian mathematician who worked in complex analysis and mechanics, introduced the distance between sets now called the Hausdorff distance, and posed the Pompeiu problem in 1929.

Dimitris Bertsimas

Dimitris Bertsimas, born in Greece in 1962, is a Greek-born American applied mathematician, Boeing Professor at MIT Sloan since 1988, known for robust optimization, machine learning, and healthcare analytics.

Dimitris E. Katsoulis

Dimitris E. Katsoulis (born 1955, Athens) is a Greek-born silicon chemist at Dow in Midland, Michigan, known for polyoxometalates, silicone chemistry, and 64 US patents.

Dimmock v Secretary of State for Education and Skills

Dimmock v Secretary of State for Education and Skills is a 2007 High Court judicial review brought by Stewart Dimmock over distributing An Inconvenient Truth to English schools.

Dimyristoylphosphatidylcholine

Dimyristoylphosphatidylcholine (DMPC) is a synthetic phosphatidylcholine with two saturated 14-carbon myristoyl chains and a phase transition near 24 °C, widely used in liposomes and model membranes for membrane studies and drug delivery.

Oct 22, 2026

Dineutron correlation

Dineutron correlation is the pairing of two neutrons, usually spin zero, into a compact cluster on the surface of neutron-rich halo nuclei like ¹¹Li, though two free neutrons do not bind.

Dinitrobenzene

Dinitrobenzene is any of three isomers of benzene bearing two nitro groups, pale crystalline solids used chiefly in dye manufacture and known for causing methemoglobinemia.

Oct 22, 2026

Dinitrogen activation

Dinitrogen activation is the chemical process of weakening or cleaving the strong N≡N triple bond of N₂ so its nitrogen atoms form new bonds, most importantly reducing N₂ to ammonia for fertilizer.

Dinitrogen tetroxide

Dinitrogen tetroxide, also called nitrogen tetroxide or NTO, is a red-brown liquid oxidizer, boiling at 21.2 °C, used in the Titan II missile and the Apollo program.