All articles starting with H
20,046 articles
Halonitrophenols
Halonitrophenols are phenol compounds whose rings carry both a halogen atom and a nitro group, making them far more acidic than chlorophenols or nitrophenols alone.
Haloperidol
Haloperidol (Haldol), a butyrophenone typical antipsychotic synthesized at Janssen in Belgium on 11 February 1958 as R-1625, acts via dopamine D2 blockade; WHO essential medicine since 1977 for psychosis, with EPS and QT risks.
Halophile
Halophile: salt-loving microorganism requiring or tolerating high NaCl, found across Archaea, Bacteria, and Eukarya; classified slight, moderate, or extreme; uses salt-in or salt-out osmoadaptation; industrially valued for halozymes and bioplastics.
Halophyte
Halophyte: salt-tolerant plant surviving at about 200 mM NaCl or more; also called salt-loving plants, contrasted with glycophytes. About 1% of flora; tolerate salt via vacuolar ion compartmentalization, compatible solutes, and salt glands.
Haloprogin
Haloprogin (C9H4Cl3IO, brand Halotex) is a discontinued halogenated phenolic ether topical antifungal, approved 1982, used at 1% twice daily for tinea and cutaneous candidiasis; mechanism unknown, more skin irritation than clotrimazole.
Halorespiration
Halorespiration, now called organohalide respiration (OHR), is an anaerobic bacterial process in which halogenated compounds serve as terminal electron acceptors and are reductively dehalogenated, important in bioremediation.
Halorhodopsin
Halorhodopsin (HR), a microbial rhodopsin chloride pump, uses light-absorbing retinal to pump chloride into cells; Natronomonas pharaonis HR (590 nm) is the optogenetic neural silencer, distinct from proton-pumping bacteriorhodopsin.
Halorubrum
Halorubrum is a genus of red-pigmented, extremely halophilic archaea (haloarchaea) with about 40 valid species, dominant in salt lakes and salterns; type species H. saccharovorum, including the Antarctic H. lacusprofundi.
Halosulfuron methyl
Halosulfuron-methyl (CAS 100784-20-1/100785-20-1) is a sulfonylurea, WSSA Group 2 ALS-inhibiting herbicide for nutsedge and broadleaf weed control in corn, rice, and turf; trade names include Sedgehammer and Permit.
HaloTag
HaloTag is a protein tagging technology in which an engineered 33 kDa bacterial dehalogenase covalently binds chloroalkane ligands, allowing one fusion construct for imaging, purification, and degradation.
Halothane
Halothane (Fluothane), a halogenated hydrocarbon inhalational anesthetic introduced in 1956, C2HBrClF3; removed from the WHO Essential Medicines List in 2025 over hepatotoxicity and greenhouse gas impact, still used in some low-resource settings.
Haloti Ngata
Haloti Ngata (Etuini Haloti Ngata), Tongan-American NFL defensive tackle born 1984, Oregon All-American, Ravens first-round pick 2006, five Pro Bowls, Super Bowl XLVII champion, retired 2019.
Halotti beszéd és könyörgés
Halotti beszéd és könyörgés, the Funeral Sermon and Prayer, is the earliest surviving coherent Hungarian text, a 32-line sermon and prayer in the Pray Codex.
Haloxyfop
Haloxyfop (haloxyfop-P, haloxyfop-R methyl ester) is an aryloxyphenoxypropionate, ACCase-inhibiting herbicide controlling grass weeds in broadleaf crops; the R-enantiomer is active, and EU approval ended in 2020.
Haloxylon
Haloxylon (saxaul) is a genus of about 12 Amaranthaceae shrubs and small trees of saline and arid deserts from Spain and North Africa to Central Asia and Mongolia, used for sand fixation, fodder, fuel, and medicine.
Haloxylon ammodendron
Haloxylon ammodendron (saxaul, saxoul), an Amaranthaceae C4 xero-halophytic desert shrub from Iran to Mongolia and N. & W. China; groundwater-dependent phreatophyte, IUCN Least Concern, widely planted for sand fixation and windbreaks.
Halparuntiya I (Gurgum)
Halparuntiya I was a king of Gurgum, a Neo-Hittite kingdom centered on modern Kahramanmaraş in southern Turkey, who reigned around 910 BC as the son of Muwizi and father of Muwatalli II.
Halparuntiya II (Gurgum)
Halparuntiya II, also rendered Qalparunda, was a king of the Neo-Hittite kingdom of Gurgum, reigning from about 860 BC and appearing as a tributary of Shalmaneser III.
Halparuntiya III (Gurgum)
Halparuntiya III, also Qalparunda III, was a king of the Neo-Hittite state of Gurgum, capital at Marqas (modern Kahramanmaraş, Turkey), around 800 BC, known from a gate lion bearing a seven-generation genealogy.
Halqa-e Arbab-e Zauq
Halqa-e Arbab-e Zauq (حلقہ اربابِ ذوق), meaning "Circle of Connoisseurs," is a Lahore-based Urdu literary society founded in 1939 that became the principal vehicle of modernism in 20th-century Urdu poetry.
Hals (Mercurian crater)
Hals is a 100-km-diameter impact crater on Mercury at 54.8°S, 115°W in quadrangle H-12, named for Dutch painter Frans Hals and adopted by the IAU in 1985.
Halsa
Halsa, former municipality on Nordmøre in Møre og Romsdal, Norway (pop. 1,574 in 2019, no. 1571); merged with Hemne and part of Snillfjord into Heim municipality, Trøndelag, on 1 January 2020 under the municipal reform. Distinct from Halsa in Meløy, Nordland.
Halsey (singer)
Halsey, born Ashley Nicolette Frangipane (1994, Edison, New Jersey), is an American pop and alternative-rock singer known for concept albums Badlands, Hopeless Fountain Kingdom, Manic, If I Can't Have Love I Want Power, and The Great Impersonator.
Halsey discography
Halsey discography: the recorded output of Ashley Nicolette Frangipane (born 1994), five studio albums from Badlands (2015) to The Great Impersonator (2024), plus live albums, EPs, and singles including "Closer" and "Without Me".
Halsi Copper-plates of the Kadambas
The Halsi Copper-plates of the Kadambas (हलसि ताम्रपत्र) are seven sets of copper-plate land grants issued by the Kadamba dynasty from Halsi, Karnataka, in the fifth and sixth centuries.
Halstead complexity measures
Halstead complexity measures are software metrics introduced by Maurice Halstead in 1977 to measure program complexity, effort, and likely errors from counts of operators and operands in source code.
Halstock
Halstock, Dorset village with a Romano-British villa (Halstock Roman Villa) excavated 1967–1985 by Ron Lucas, occupied c. AD 140–400; also St Juthware legend and 847 grant to Sherborne Abbey.
Halston
Halston (Roy Halston Frowick, 1932-1990), American fashion designer and first celebrity designer, famed for the Ultrasuede shirtdress model 704, Jackie Kennedy's pillbox hat, Studio 54 glamour, and name licensing.
Halston (miniseries)
Halston is a five-episode Netflix limited series (premiered May 14, 2021) starring Ewan McGregor as designer Roy Halston Frowick, directed by Daniel Minahan, executive produced by Ryan Murphy, based on Steven Gaines's Simply Halston.
Halston Sage
Halston Sage (born Halston Jean Schrage, 1993, Los Angeles) is an American actress known for Grace King in How to Rock, Lt. Alara Kitan in The Orville, Ainsley Whitly in Prodigal Son, Paper Towns, Dazzler in Dark Phoenix, and producing The List.