All articles starting with E

Epona

Epona was a Celtic goddess of horses whose worship spread across the Roman Empire in the first to third centuries CE, with a festival on 18 December.

Epona Corona is a 225-km-diameter corona on Venus at 28°S, 208.5°E, IAU-named in 1994 for the Celtic horse goddess Epona; formerly treated as a single multiple corona, now split into individually named components.

Éponine

Éponine is a character in Victor Hugo's Les Misérables (1862), the Thénardiers' indulged daughter who falls into poverty, loves Marius unrequitedly, and dies at the barricade; famous as the mezzo-soprano role singing "On My Own" in the musical.

Eponym

Eponym: a word or name derived from a proper name, or the person from whom something takes its name. Covers etymology (Greek eponymos), medical eponyms and their possessive-style disputes, controversies, and genericized trademarks.

Sep 19, 2026

Eponym Chronicle

The Eponym Chronicle is an Assyrian text detailing annual limmu and events from 857 BC to 700 BC. It fixes regnal years for the Neo-Assyrian Empire.

Sep 19, 2026

Eponym dating of Qataban

Eponym dating of Qataban, or Qatabanian eponyms, was the system by which the South Arabian kingdom of Qataban marked years in inscriptions through eponyms serving two-year terms.

EPOOzo-2 study

EPOOzo-2 (NCT07325851) is a prospective observational study of 120 patients receiving palliative ozone therapy at Dr. Negrín University Hospital's Chronic Pain Unit, Gran Canaria, Spain, 2026-2029, measuring quality of life.

EPOS (research infrastructure)

EPOS (the European Plate Observing System) is a distributed European research infrastructure integrating solid Earth science data and services, established as a consortium with its seat in Rome in 2018.

Epothilone

Epothilone, a 16-membered macrolide from Sorangium cellulosum So ce90, stabilizes microtubules like paclitaxel; its lactam analogue ixabepilone (Ixempra) is FDA-approved for breast cancer.

Epoxiconazole

Epoxiconazole: systemic triazole (DMI, FRAC 3) fungicide, C17H13ClFN3O, inhibiting fungal CYP51; first registered 1993 by BASF, EU approval expired 30 April 2020; used on cereals against Septoria, rusts, Fusarium head blight.

Sep 29, 2026

Epoxidation

Epoxidation is the chemical conversion of an alkene into an epoxide, a three-membered cyclic ether, by adding a single oxygen atom across the carbon–carbon double bond.

Epoxide

An epoxide, also known as an oxirane, is a cyclic ether with one oxygen and two carbon atoms in a strained three-membered ring, making it a key building block in organic synthesis and epoxy resins.

Epoxide hydrolase

Epoxide hydrolase (EH; mEH/EPHX1, sEH/EPHX2) is a cofactor-independent enzyme family that hydrolyzes epoxides to vicinal diols via an Asp-His-Asp/Glu triad and covalent intermediate; sEH is a drug target for hypertension, inflammation, and pain.

Epoxide ring-opening reactions

Epoxide ring-opening reactions are nucleophilic cleavages of the strained three-membered epoxide ring that release about 27 kcal/mol of strain and yield diols, halohydrins, or amino alcohols.

Oct 22, 2026

Epoxide–anhydride ring-opening copolymerization

Epoxide–anhydride ring-opening copolymerization (ROCOP) is a chain-growth polymerization in which an epoxide and a cyclic anhydride react in alternation, yielding degradable, often fully alternating polyesters from commercialized monomers.

Epoxidized natural rubber

Epoxidized natural rubber (ENR) is natural rubber modified with epoxy groups along its backbone, a renewable elastomer whose polarity bonds directly to silica fillers in tire treads.

Epoxy

Epoxy, also called epoxy resin or polyepoxide, is a thermosetting polymer cured with hardeners such as amines into strong cross-linked networks, used widely in adhesives and coatings.

Epoxy asphalt

Epoxy asphalt is a paving binder in which thermosetting epoxy resin cures within conventional asphalt, gaining strength over time and used chiefly on orthotropic steel bridge decks.

Sep 19, 2026

Eppendorf

Eppendorf AG is a family-owned German manufacturer of laboratory instruments and consumables, founded in Hamburg in 1945 and known for its microliter pipette, Eppendorf Tube, and centrifuges.

Eppendorf tube

An Eppendorf tube is a small single-use polypropylene microcentrifuge tube, typically holding 0.5 to 2 mL, used in laboratories to mix, store, and centrifuge microliter-scale samples.

Epping Forest

Epping Forest, an ancient wood-pasture in Essex and northeast London, is managed by the City of London Corporation as Conservators under the Epping Forest Act 1878; it is an SSSI and SAC of 1,630.74 ha with 55,000 veteran pollards.

EPPO Code

EPPO Codes are 5-6 letter unique identifiers for plants and pests in agriculture and plant protection, developed by Bayer in the 1970s and maintained by EPPO since 1996; over 98,500 species coded as of June 2025.

EPR (nuclear reactor)

The EPR, or European Pressurized Reactor, is a 1,600 MWe generation III+ pressurized water reactor developed by France and Germany; four are operating as of 2025.

EPR paradox

The EPR paradox is a 1935 argument by Einstein, Podolsky, and Rosen that, if locality holds, quantum mechanics is incomplete; Bohr replied, and Bell later reconsidered it.

EPR steering

EPR steering, also called quantum steering, is a form of quantum nonlocality where measuring one half of an entangled state remotely prepares the other half's states.

Epratuzumab

Epratuzumab (AMG 412, hLL2, LymphoCide) is a humanized anti-CD22 IgG1 monoclonal antibody with partial B-cell depletion, tested in SLE through phase III EMBODY trials, which failed, leaving it unapproved.

Oct 20, 2026

Eprenetapopt

Eprenetapopt (APR-246, PRIMA-1MET) is an investigational small-molecule p53 reactivator prodrug converted to methylene quinuclidinone; developed by Aprea Therapeutics for TP53-mutant MDS/AML, its phase 3 trial missed its primary endpoint and it is not FDA approved.