All articles A–Z
519,064 articles
Diphenylphosphine
Diphenylphosphine, IUPAC name diphenylphosphane (Ph₂PH), is a colorless, air-sensitive, pyrophoric secondary phosphine liquid with a boiling point of 280 °C, used chiefly to make phosphine ligands and as a hydrophosphination reagent.
Diphenylpyraline
Diphenylpyraline (CAS 147-20-6, Hispril, Lergobine) is a first-generation piperidine sedating antihistamine, H1 antagonist with anticholinergic action, used for allergic rhinitis and pruritus; also a cocaine-like dopamine transporter inhibitor.
Diphosphine
Diphosphine, also called diphosphane, biphosphine, or hydrogen hemiphosphide, is the liquid phosphorus hydride P₂H₄, the phosphorus analog of hydrazine, best known as the impurity that makes commercial phosphine ignite spontaneously in air.
Diphosphomevalonate decarboxylase
Diphosphomevalonate decarboxylase, also called mevalonate diphosphate decarboxylase (EC 4.1.1.33), is the terminal enzyme of the mevalonate pathway, producing isopentenyl diphosphate for isoprenoid and cholesterol biosynthesis.
Diphtheria
Diphtheria, also called the strangling angel, is a toxin-mediated bacterial disease from Corynebacterium diphtheriae causing throat pseudomembranes; preventable by DTP toxoid vaccine, fatal in 5-10% of cases.
Diphtheria & tetanus toxoids & acellular pertussis vaccine adsorbed
Diphtheria & tetanus toxoids & acellular pertussis vaccine adsorbed, sold as DAPTACEL, is a Sanofi DTaP vaccine approved in the United States in 2002 for infants and children under 7.
Diphtheria and tetanus toxoids and acellular pertussis adsorbed and inactivated poliovirus vaccine
Diphtheria and tetanus toxoids and acellular pertussis adsorbed and inactivated poliovirus vaccine, sold as Quadracel, is a Sanofi Pasteur DTaP-IPV vaccine approved in 2015 for children 4 through 6.
Diphtheria and tetanus toxoids and acellular pertussis adsorbed, inactivated poliovirus, haemophilus b conjugate [meningococcal protein conjugate] and hepatitis b [recombinant] vaccine
Vaxelis (DTaP-IPV-Hib-HepB) is a hexavalent infant combination vaccine by MCM/MSP Vaccine Company, EMA-approved 2016 and FDA-licensed December 21, 2018, given at 2, 4, and 6 months and not used as a booster.
Diphtheria and tetanus vaccine adsorbed
Diphtheria and tetanus vaccine adsorbed (DT, Dual Antigen) is a WHO-prequalified pediatric toxoid vaccine by Serum Institute of India for children under 7 when pertussis vaccination is contraindicated; 0.5 ml IM doses, thiomersal-preserved.
Diphtheria and tetanus vaccine adsorbed for adults and adolescents
Diphtheria and Tetanus Vaccine Adsorbed for Adults and Adolescents (dT) is a WHO-prequalified reduced-diphtheria-antigen toxoid vaccine by Serum Institute of India, prequalified since 4 April 1995, given intramuscularly, stored at 2-8°C with 36-month shelf life.
Diphtheria toxin
Diphtheria toxin, the ADP-ribosylating A-B toxin of Corynebacterium diphtheriae carrying the tox gene, inactivates elongation factor 2 to cause diphtheria; discovered by Roux and Yersin in 1888.
Diphtheria, tetanus, pertussis and haemophilus influenzae type b conjugate vaccine
DTwP-Hib (Diphtheria, tetanus, pertussis and Haemophilus influenzae type b conjugate vaccine), also DTwP+Hib, a tetravalent adsorbed infant combination vaccine; whole-cell pertussis plus Hib conjugate, 3 doses from 6 weeks, WHO-prequalified products from Serum Institute of India and others.
Diphtheria, tetanus, pertussis, hepatitis b and haemophilus influenzae type b conjugate vaccine adsorbed
Diphtheria, tetanus, pertussis, hepatitis B and Haemophilus influenzae type b conjugate vaccine adsorbed (DTwP-HepB-Hib), a WHO-prequalified liquid pentavalent infant vaccine by Serum Institute of India, prequalified 22/09/2010, 2-dose vial, thiomersal-preserved, distinct from hexavalent HEXASII.
Diphthong
Diphthong: a vowel sound in which the tongue moves within one syllable to produce two vowel qualities, from Greek 'two sounds'. Contrasted with hiatus (two syllables) by duration and F2 curvature; reduces to monophthongs; studied in Spanish, Romanian, and English.
Diphylla
Diphylla, the hairy-legged vampire bat genus (Diphylla ecaudata), a monotypic Desmodontinae bat from Mexico to Brazil that roosts in caves and feeds entirely on bird blood.
Diphyllobothriasis
Diphyllobothriasis, fish or broad tapeworm infection, is an intestinal disease from eating raw or undercooked fish carrying Dibothriocephalus latus and related diphyllobothriid tapeworms; worms exceed 10 m, infections last up to 25 years, and praziquantel treats them.
Diphyllobothriasis and sparganosis
Diphyllobothriasis and sparganosis (ICD-10 B70) are diphyllobothriid tapeworm diseases: intestinal adult-worm infection from raw fish (Dibothriocephalus, Adenocephalus) and tissue larval infection from Spirometra spargana, treated with praziquantel.
Diphyllobothrium
Diphyllobothrium, broad or fish tapeworms (Diphyllobothriidae); most human-infecting species now Dibothriocephalus or Adenocephalus. Two-bothria scolex, up to 15 m adults, fish-borne diphyllobothriasis, eggs 55–75 µm with operculum.
Dipicolinic acid
Dipicolinic acid (pyridine-2,6-dicarboxylic acid, DPA) is a pyridinedicarboxylic acid that accumulates as a calcium chelate in Bacillus and Clostridium endospores, conferring heat resistance, and serves as a tridentate ligand in coordination chemistry.
Dipika Chikhlia
Dipika Chikhlia, also credited Deepika Chikhalia Topiwala, is an Indian actress born 1965 in Mumbai, famous as Sita in Ramanand Sagar's 1987 Doordarshan Ramayan; later a 1991 member of Parliament and producer of Dhartiputra Nandini.
Dipika Kakar
Dipika Kakar Ibrahim (Faiza), born 1986 in Pune, is an Indian TV actress known as Simar in Sasural Simar Ka (2011-2017), winner of Bigg Boss 12 (2018), lead of Kahaan Hum Kahaan Tum, and diagnosed with stage 2 liver cancer in 2025.
Dipika Pallikal
Dipika Pallikal Karthik, Indian squash player from Chennai; first Indian in women's world top 10 (Dec 2012), Arjuna Award 2012, CWG 2014 doubles gold, 2022 World Doubles twin golds, 2023 Asian Games mixed doubles gold; wife of cricketer Dinesh Karthik.
Dipika Pandey Singh
Dipika Pandey Singh, born 1976, is an Indian National Congress politician serving as a Jharkhand minister for rural development, rural work, and Panchayati Raj, and MLA from Mahagama since 2019.
Dipivefrin
Dipivefrin (dipivalyl epinephrine, brand Propine) is an epinephrine prodrug eye drop for glaucoma; 0.1% twice daily, 17-fold better corneal penetration, discontinued in the US.
Dipka Coal Mine
Dipka Coal Mine, also known as the Dipka Opencast Project, is a large opencast coal mine in Korba district, Chhattisgarh, India, operated by South Eastern Coalfields Limited.
Diplexer
A diplexer is a filter device that lets two signals at different frequency bands share one antenna and feeder, combining them for transmission or splitting them for reception.
Diplo
Diplo (Thomas Wesley Pentz, born 1978, Tupelo, Mississippi) is an American DJ and producer behind Major Lazer, Jack Ü, Silk City, and LSD, with three Grammy wins from 13 nominations.
Diplocaulus
Diplocaulus is an extinct boomerang-headed lepospondyl tetrapod (not a modern amphibian) from the Carboniferous-Permian of North America, with D. minimus from Late Permian Morocco; its tabular horns acted as a hydrofoil.
Diplocynodon
Diplocynodon (Pomel, 1847) is an extinct European alligatoroid crocodyliform genus spanning late Paleocene to Middle Miocene, known from over 300 localities; a 2026 revision confirms 9 valid species of 11.
Diplodia tip blight
Diplodia tip blight, also called Sphaeropsis tip blight or Diplodia blight, is a fungal pine disease caused by Diplodia sapinea, killing shoots of two- and three-needle pines, especially Austrian pine, after stress such as drought or hail.