All articles starting with D
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Deontay Wilder
Deontay Wilder, "The Bronze Bomber" (born 1985, Tuscaloosa, Alabama), American heavyweight boxer, 2008 Olympic bronze medalist and former WBC heavyweight champion (2015-2020, 10 defenses), famed for right-hand knockout power; record 45-4-1 with 43 KOs.
Deontay Wilder vs. Tyson Fury
Deontay Wilder vs. Tyson Fury: heavyweight boxing trilogy, 2018-2021. First fight split draw (115-111, 114-112, 113-113), Fury won rematches by TKO7 (2020) and KO11 (2021).
Deontay Wilder vs. Tyson Fury II
Deontay Wilder vs. Tyson Fury II, the February 22, 2020 Las Vegas rematch, saw Fury stop WBC champion Wilder by seventh-round TKO after their 2018 split draw, taking the heavyweight title.
Deontic logic
Deontic logic, or deontic modal logic, is the branch of logic studying obligation, permission, and prohibition, with roots in ethics and law and modern uses in computer science.
Deontology
Deontology is the family of normative ethical theories holding that actions are right or wrong by duties, rules, and rights rather than consequences alone. Key forms: Kantian ethics, Ross's prima facie duties, contractualism; distinguished by agent-relative constraints and priority of the right over the good.
Deool Band 2
Deool Band 2 (देऊळ बंद 2) is a 2026 Marathi devotional drama sequel written and directed by Pravin Tarde, starring Mohan Joshi and Snehal Tarde, released 21 May 2026 by Vatavruksha Entertainment and streaming on Prime Video.
Deopara inscription of Vijayasena
The Deopara inscription (देओपरा शिलालेख), also called the Deopara Prashasti, is a Sanskrit panegyric on stone at Deopara, Bangladesh, composed by Umapatidhara for the Sena king Vijayasena.
Deor
Deor, also called The Lament of Deor, is a 42-line Old English poem in the 10th-century Exeter Book, in which a displaced poet consoles himself with the refrain "that passed away, so may this".
Deorbit of Mir
The deorbit of Mir was the deliberate, controlled reentry of Russia's Mir space station into the South Pacific Ocean on March 23, 2001, after 15 years in orbit.
Deorbit sail
A deorbit sail, also called a drag sail, is a deployable membrane that raises a satellite's atmospheric drag so it reenters and burns up sooner, without propellant.
Deoria
Deoria (देवरिया) is a district in eastern Uttar Pradesh, India, created from Gorakhpur district on 16 March 1946. Census 2011: 3,100,946 people, 71.13% literacy, 1,017 sex ratio, 2,540 sq km, headquarters at Deoria town.
Déou attack
The Déou attack was a jihadist assault on a Burkinabè military detachment at Déou, in Oudalan Province, Burkina Faso, on 12 September 2022, killing two soldiers and wounding about ten.
Deoxidation of steel
Deoxidation of steel is the removal of dissolved oxygen from liquid steel by adding elements with a strong oxygen affinity, chiefly aluminum, silicon, and manganese, producing sound steel.
Deoxo reactor
A deoxo reactor is a catalytic vessel that removes oxygen from gas streams by reacting it with hydrogen over a platinum or palladium catalyst, converting the two gases to water.
Deoxycholic acid
Deoxycholic acid (DCA), a secondary bile acid made by gut bacteria from cholic acid via the bai operon; FXR/TGR5 ligand, cancer-linked, and the drug Kybella for submental fat.
Deoxycorticosterone
Deoxycorticosterone (DOC), also called 11-deoxycorticosterone or cortexone, is a steroid hormone synthesized by the adrenal gland, a precursor of corticosterone and aldosterone with mineralocorticoid activity.
Deoxycytidine
Deoxycytidine (2′-deoxycytidine, dC) is a pyrimidine deoxyribonucleoside, one of the four nucleoside components of DNA, and the metabolic starting point for anticancer drugs such as gemcitabine and cytarabine.
Deoxycytidylate deaminase
Deoxycytidylate deaminase (dCMP deaminase, DCTD, EC 3.5.4.12) is a zinc-dependent cytidine deaminase superfamily hexameric enzyme converting dCMP to dUMP for thymidylate synthesis, allosterically activated by dCTP and inhibited by dTTP.
Deoxycytidylate hydroxymethylase
Deoxycytidylate hydroxymethylase (dCMP hydroxymethylase, EC 2.1.2.8, T4 gene 42 product gp42) is the first virus-encoded enzyme discovered; a thymidylate synthase homodimer homologue that converts dCMP to 5-hydroxymethyl-dCMP using methylenetetrahydrofolate, enabling glucosylated, restriction-resistant T4 phage DNA.
Deoxydehydration
Deoxydehydration (DODH) is a catalytic reaction that removes two adjacent hydroxyl groups from a vicinal diol to form an alkene, studied for converting biomass polyols to olefins.
Deoxyfluorination
Deoxyfluorination is a chemical reaction that replaces oxygen-containing groups with fluorine, converting alcohols into alkyl fluorides and carbonyls into geminal difluorides; it is the most widely used method for installing aliphatic C–F bonds.
Deoxygenative alkylation
Deoxygenative alkylation is a set of synthetic organic reactions in which an alcohol's hydroxyl group is replaced by an alkyl group, usually via radical intermediates under photoredox or metal catalysis.
Deoxyguanosine
Deoxyguanosine (2′-deoxyguanosine, abbreviated dGuo or dG) is one of the four deoxynucleoside building blocks of DNA, consisting of the nucleobase guanine attached to a deoxyribose sugar.
Deoxyhypusine
Deoxyhypusine is a non-proteinogenic L-lysine derivative, Nε-(4-aminobutyl)-lysine, formed by deoxyhypusine synthase on eIF5A as the intermediate in hypusine biosynthesis, which activates eIF5A in eukaryotic and archaeal cells.
Deoxyhypusine synthase
Deoxyhypusine synthase (DHS, DHPS), the NAD+-dependent enzyme catalyzing the first step of eIF5A hypusination, transferring spermidine's aminobutyl group to Lys50; inhibited by GC7 (Ki 10 nM) and newer allosteric inhibitors.
Deoxynojirimycin
Deoxynojirimycin (1-DNJ, DNJ), also known as moranoline, is a naturally occurring iminosugar from mulberry that potently inhibits α-glucosidase; its derivatives miglitol, miglustat, and migalastat are approved medicines.
Deoxypyridinoline
Deoxypyridinoline (DPD), also called lysyl pyridinoline, is a collagen crosslink found almost exclusively in bone and dentin whose urinary excretion serves as a marker of bone resorption.
Deoxyribonuclease
Deoxyribonuclease (DNase), EC 3.1.-, any enzyme hydrolyzing phosphodiester bonds in DNA. Two families: cation-dependent neutral-pH DNase I and cation-independent acidic DNase II; dornase alfa treats cystic fibrosis.
Deoxyribonuclease II
Deoxyribonuclease II (DNase II, acid DNase, DNase IIα) is a lysosomal endonuclease active at pH ~5.2 without divalent cations, leaving 3'-phosphate/5'-OH ends; essential for apoptotic and erythroid DNA clearance, lethal when knocked out in mice.
Deoxyribose
Deoxyribose (2-deoxy-D-ribose, thyminose), C5H10O4, is the pentose sugar of DNA, ribose lacking its 2-hydroxyl; covers structure, stability, metabolism, DNA damage, and prebiotic research.