All articles starting with E

Enzyme Commission number

An Enzyme Commission (EC) number is a four-part numerical code identifying an enzyme by the reaction it catalyzes, assigned by the IUBMB's Nomenclature Committee since 1961.

Enzyme electrode

An enzyme electrode is an electrochemical sensor in which an immobilized enzyme layer on an electrode lets reaction products be measured, the core of biosensors like blood glucose meters.

Enzyme immobilization is the attachment or confinement of enzymes to or within insoluble materials so the catalyst can be reused. Methods include adsorption, covalent binding, entrapment, and cross-linking.

Sep 29, 2026

Enzyme immunoassay

An enzyme immunoassay (EIA) is a biochemical test using an enzyme-labeled antibody to detect and quantify analytes in biological samples; the plate-based ELISA is its most common form.

Sep 29, 2026

Enzyme induced carbonate precipitation

Enzyme induced carbonate precipitation (EICP) is a ground improvement method in which urease enzyme catalyzes calcium carbonate precipitation, bonding soil particles to strengthen sands, control dust, and heal cracks.

Oct 21, 2026

Enzyme Induction

Enzyme induction: increased synthesis of an inducible enzyme in response to an inducer, classically via repressor-operator control (lac operon) and, in drug metabolism, via nuclear receptor activation of CYP enzymes, causing drug-drug interactions.

Enzyme inhibitor

An enzyme inhibitor is a molecule that binds to an enzyme and decreases its catalytic activity. Inhibitors include reversible types, covalent irreversible agents, and widely used drugs.

Enzyme kinetics

Enzyme kinetics, also called Michaelis-Menten kinetics, studies how substrate, inhibitor, and enzyme concentrations determine enzyme-catalyzed reaction rates, defined by the hyperbolic Michaelis-Menten equation with parameters Km and Vmax, now fitted by nonlinear regression rather than Lineweaver-Burk plots.

Enzyme promiscuity

Enzyme promiscuity is the ability of an enzyme to catalyze reactions beyond its specialized function, often serving as a starting point for evolving new enzyme functions.

Oct 21, 2026

Enzyme Replacement Therapy

Enzyme replacement therapy (ERT) administers a missing enzyme, first for Gaucher disease in 1991, later Pompe, Fabry, MPS, alpha-mannosidosis, cTTP (Adzynma), and pancreatic insufficiency; limited by blood-brain barrier and antibodies.

Sep 29, 2026

Enzyme-assisted extraction

Enzyme-assisted extraction (EAE) is a green extraction method that uses hydrolytic enzymes such as cellulases and pectinases to degrade plant cell walls, improving yields of bioactive compounds.

Enzyme-embedded self-degrading plastics

Enzyme-embedded self-degrading plastics are biodegradable polyesters containing plastic-degrading enzymes dispersed during manufacture, so moisture and warmth activate the enzyme to cut the polymer apart from within.

Oct 21, 2026

Enzyme-modified dextrin

Enzyme-modified dextrin, also called resistant dextrin or resistant maltodextrin (NUTRIOSE, FiberSMART), is a soluble starch-derived dietary fiber made by acid-heat dextrinization plus enzymatic treatment; FDA GRAS since 2013, 3 to 9 g per serving.

Enzyme-powered nanomotor

An enzyme-powered nanomotor (EMNM) is a micro- or nanoscale device that converts chemical energy into motion using enzymes as biocatalysts, propelling itself on fuels such as glucose or urea.

Enzyte

Enzyte, a "natural male enhancement" dietary supplement from Berkeley Premium Nutraceuticals/Vianda of Cincinnati, known for Smiling Bob ads, QTc prolongation findings, and FTC and state fraud settlements.

Eoarchean

The Eoarchean is the earliest era of the Archean eon, spanning 4031 to 3600 million years ago, containing Earth's oldest dated rocks and oldest contested evidence for life.

Eobard Thawne

Eobard Thawne, also called Reverse-Flash and Professor Zoom, is a DC Comics supervillain from the 25th century who replicated the Flash's powers, debuting in The Flash #139 (1963), and poses as Harrison Wells in The CW's The Flash.

Eobard Thawne (Arrowverse)

Eobard Thawne (Arrowverse), the Reverse-Flash, is a 22nd-century speedster villain in The CW's Arrowverse, played by Tom Cavanagh and Matt Letscher, archenemy of Barry Allen who posed as Harrison Wells, drew power from the Negative Speed Force, and died in 2022.

Eobu sasa

Eobu sasa (어부사시사) is a 1651 cycle of 40 Korean sijo songs by Yun Seondo, describing the scenery and leisurely life of a fishing village through the four seasons.

Eobusa

Eobusa (어부사) is a Korean gasa poem, the Fisherman's Song revised by the scholar Yi Hyeon-bo in 1549 and later sung among the twelve gasa.

Eobuwie

Eobuwie, also known as MODIVO S.A., is a Polish online retailer of footwear and accessories, majority-owned by the CCC shoe retailer and operating across European markets.

eobuwie.pl

eobuwie.pl is a Polish online footwear and accessories retailer founded in 2006 and headquartered in Zielona Góra, which since January 2022 has operated as a brand within MODIVO S.A., the e-commerce arm of Poland's CCC Group.

Eocaecilia

Eocaecilia micropodia, Early Jurassic stem-group caecilian from the Kayenta Formation, Arizona; oldest known caecilian, described 1993, notable for retaining limbs and primitive skull bones.

Eocene

The Eocene is a geologic epoch from 56 to 33.9 million years ago, the second epoch of the Paleogene Period and the longest warm interval of the Cenozoic.

Eocene Thermal Maximum 2

Eocene Thermal Maximum 2 (ETM-2, H-1, Elmo event), a hyperthermal warming ~53.7–54.1 Ma, ~1.8 Myr after the PETM, with a −1.5‰ carbon isotope excursion, ~3°C warming, and 2,600–3,800 Gt C released.

Eocene–Oligocene extinction event

The Eocene–Oligocene extinction event, or Eocene–Oligocene transition, was a period of faunal turnover about 34 million years ago, as Earth's climate shifted from greenhouse to icehouse.

Eocrinoidea

Eocrinoidea (Jaekel, 1918) is an extinct class of Cambrian to Ordovician stalked echinoderms with a sack-like theca, brachioles, and five ambulacra; gogiids are its largest order, and the group may be paraphyletic.

Eocyathispongia

Eocyathispongia (Eocyathispongia qiania) is a monotypic genus of 600-million-year-old Ediacaran fossil animal from the Doushantuo Formation, South China, described in 2015 as a sponge-grade organism with three hollow tubes and pinacocyte-like cells; its sponge identity is disputed and only one specimen is known.