All articles starting with G
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Geita (city)
Geita, a gold-mining city in northwestern Tanzania and capital of Geita Region (created 2012), grew from 14,000 people in 1988 to over 360,000 by the 2022 census, driven by the Geita Gold Mine.
Gejje Pooje (ಗೆಜ್ಜೆಪೂಜೆ)
Gejje Pooje (ಗೆಜ್ಜೆಪೂಜೆ), also transliterated Gejjepooje, is a 1969 Kannada drama directed by Puttanna Kanagal from M.K. Indira's novel, starring Kalpana; it won Best Feature Film in Kannada and Best Screenplay at the 17th National Film Awards.
Gekko
Gekko (Laurenti, 1768) is a gecko genus of Asia, including the tokay gecko and the diverse subgenus Japonigekko (38–41 East Asian species), with six species groups and rapidly growing species counts.
GEKKO XII
GEKKO XII is a twelve-beam neodymium glass laser for inertial confinement fusion research at Osaka University, Japan, completed in 1983 and reaching 20 kJ output.
Gekkonidae
Gekkonidae, the typical geckos, is the largest gekkotan lizard family, over 1,400 species in 118 genera, circumglobal between 50°N and 50°S, known for van der Waals-based adhesive toe pads with keratinous setae and spatulae.
Gel
A gel is a non-fluid colloidal or polymer network expanded throughout its whole volume by a fluid, as defined by IUPAC in 2007, solid enough to hold its shape yet soft and largely liquid by volume.
Gel casting
Gel casting is a ceramic powder forming method that solidifies a concentrated slurry in a mold by in-place polymerization, developed at Oak Ridge National Laboratory and reported in 1991.
Gel electrophoresis
Gel electrophoresis: laboratory technique separating proteins, DNA, or RNA by size and charge in agarose or polyacrylamide gels; invented from Tiselius's 1937 apparatus, with SDS-PAGE, 2D gels, PFGE, and capillary variants.
Gel extraction
Gel extraction is a molecular biology technique that purifies a DNA fragment out of a slice cut from an agarose gel, usually with a silica spin-column kit.
Gel layer
A gel layer is a concentrated layer of rejected macromolecular solute or colloidal particles that forms on a membrane surface during ultrafiltration, adding resistance and causing the limiting flux.
Gel permeation chromatography
Gel permeation chromatography (GPC), also called size-exclusion chromatography, is a liquid chromatography technique that separates polymers by size in solution to determine molar mass distributions.
Gel polymer electrolyte
A gel polymer electrolyte, also called a plasticized polymer electrolyte, is a quasi-solid battery electrolyte in which a polymer network traps liquid electrolyte, first reported in 1975.
Gel stent implantation
Gel stent implantation is a minimally invasive glaucoma procedure that lowers eye pressure by shunting fluid under the conjunctiva through the XEN Gel Stent, first FDA-cleared in 2016.
Gela
Gela (Greek Ghéla) is a Sicilian city, founded c. 689-688 BCE by Rhodian and Cretan colonists, mother city of Agrigento, ruled by tyrant Gelon, destroyed by Carthage in 405 BCE and by Phintias c. 282 BCE; modern Terranova, renamed 1927, petrochemical center.
Gelada
Gelada (Theropithecus gelada, gelada baboon, bleeding-heart baboon): the only living species of Theropithecus, a grass-eating monkey endemic to the Ethiopian Highlands, with a multi-level society and under 250,000 wild individuals.
Geladaindong Peak
Geladaindong Peak (各拉丹冬, Geladandong), 6,621 m, is the highest summit of the Tanggula Mountains in Qinghai, China, and the glacier source of the Yangtze River's Tuotuo headwater; first climbed 1985, now closed in Sanjiangyuan National Park.
Gelasian
The Gelasian is a geological stage from about 2.58 to 1.80 million years ago, now the lowest stage of the Pleistocene and defining the base of the Quaternary.
Gelasius Dobner
Gelasius Dobner, born Job Felix Dobner (1719–1790), was a Piarist priest and historian in Prague who founded the critical method in Czech historiography, dismantling Hájek's chronicle.
Gelasius I
Gelasius I was the 49th pope, reigning from 492 until his death in 496, and wrote the influential "two powers" doctrine separating priestly and royal authority.
Gelasius II
Gelasius II, born John of Gaeta, was pope from January 1118 until his death at Cluny in January 1119, after a violent election and exile under Emperor Henry V.
Gelastic seizures with hypothalamic hamartoma
Gelastic seizures with hypothalamic hamartoma (GS-HH, ORPHA:86906) is a rare epilepsy syndrome with early-onset ictal laughter or crying from a non-neoplastic hypothalamic hamartoma, often progressing to intractable epilepsy, cognitive decline, and precocious puberty.
Gelati Monastery
Gelati Monastery (გელათის მონასტერი), founded 1106 by David IV the Builder near Kutaisi, Georgia, is a UNESCO World Heritage medieval Orthodox monastery with a 12th-century apse mosaic, 12th-17th century murals, and a famed Academy.
Gelatin
Gelatin, also called collagen hydrolysate or collagen peptide, is a protein obtained by partial hydrolysis of collagen from animal skins, bones, and tendons, used in food, pharmaceuticals, and photography.
Gelatin methacryloyl
Gelatin methacryloyl (GelMA), also called gelatin methacrylate, is a gelatin derivative that crosslinks into a hydrogel under light and serves as a common bioink for 3D bioprinting.
Gelatin silver print
A gelatin silver print is a black-and-white photograph whose image consists of metallic silver particles in a gelatin layer on paper, introduced in the 1880s.
Gelatin zymography
Gelatin zymography is a gel-based enzyme activity assay in which gelatin cast into an SDS-polyacrylamide gel is digested by separated gelatinases, detecting MMP-2 and MMP-9 as clear bands.
Gelatinase
Gelatinase (gelatinase A, MMP-2; gelatinase B, MMP-9): zinc-dependent matrix metalloproteinases degrading gelatin and type IV collagen, key to ECM remodeling, metastasis, and wound healing.
Gelatinase B
Gelatinase B (MMP-9, 92 kDa type IV collagenase) is the largest matrix metalloproteinase, a zinc endopeptidase secreted by neutrophils and macrophages that degrades gelatin and type IV collagen; no selective inhibitor has passed clinical trials.
Gelatine dessert
Gelatine dessert: a sweet dish set with gelatin from animal collagen, from medieval banquet jellies to Jell-O, patented as a powder by Peter Cooper in 1845 and popularized by the Genesee Pure Food Company from 1900.
Gelatinous drop-like corneal dystrophy
Gelatinous drop-like corneal dystrophy (GDLD, OMIM 204870), also called subepithelial amyloidosis of the cornea, is a rare autosomal recessive TACSTD2-related corneal amyloidosis causing childhood-onset vision loss, commonest in Japan, with recurrent deposits after keratoplasty.