All articles starting with P
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Pecos Bill
Pecos Bill, a mythical Southwestern cowboy of American tall tales (fakelore), first published by Edward O'Reilly in The Century Magazine in 1923; stories tell of his coyote upbringing, cyclone riding, and Slue-Foot Sue.
Pécs
Pécs (Fünfkirchen, Pečuh, Latin Quinque Ecclesiae, Roman Sopianae) is Hungary's fifth-largest city, seat of Baranya County, with 137,976 residents in 2026, a UNESCO-listed 4th-century early Christian necropolis, Hungary's first university (1367), and European Capital of Culture 2010.
PECS block
The PECS (pectoral nerve) block is an ultrasound-guided fascial plane block that numbs the anterior chest wall, used mainly for breast surgery and pacemaker insertion.
Pectate lyase
Pectate lyase, a pectin-degrading enzyme family with a tunnel-like fold; pollen members are major allergens, notably Amb a 1 (w230) of short ragweed, 38 kDa, sensitizing over 90% of ragweed-allergic patients and anchoring US ragweed extract standardization.
Pecten (genus)
Pecten (O. F. Müller, 1776) is a genus of scallops, family Pectinidae, including the king scallop Pecten maximus of the northeast Atlantic, the Mediterranean P. jacobaeus, and the Australian commercial scallop P. fumatus.
Pecten maximus
Pecten maximus, the king or great Atlantic scallop (coquille Saint-Jacques, Jakobsmuschel, vieira), is a large northeast Atlantic pectinid bivalve reaching 150 mm, fished mainly by dredge, with 74,494 t landed in 2023.
Pectic acid lyase
Pectic acid lyase (pectate lyase, EC 4.2.2.2) is a calcium-dependent polysaccharide lyase that cleaves de-esterified pectin by anti beta-elimination, yielding unsaturated oligogalacturonates; alkaline enzymes from PL families 1, 2, 3, 9, 10.
Pectin
Pectin (E 440) is a plant polysaccharide of α-1,4-linked D-galacturonic acid, extracted from citrus peel and apple pomace, used as a gelling agent in jams and as a dietary fiber and biomaterial.
Pectin lyase
Pectin lyase (EC 4.2.2.10, PMGL) is a PL1-family β-helix lyase that cleaves methyl-esterified pectin by β-elimination without forming methanol; used in fruit juice clarification, GRAS-listed (GRN 32) and EFSA-evaluated.
Pectin methylesterase
Pectin methylesterase (PME, EC 3.1.1.11, CE8) demethylesterifies pectin homogalacturonan, releasing methanol; plant and microbial isoforms differ in action pattern, PMEIs inhibit it, and it drives citrus juice cloud loss.
Pectinatus
Pectinatus, genus of strictly anaerobic, Gram-negative-staining beer-spoilage bacteria (P. cerevisiiphilus, P. frisingensis, P. haikarae) causing turbidity and hydrogen sulfide odors; grows in beer using glycerol, limited by 5.2% ethanol.
Pectobacterium
Pectobacterium, formerly pectinolytic Erwinia, is a genus of Gram-negative soft-rot plant pathogenic enterobacteria causing blackleg and tuber rot, especially on potato, via quorum-sensing-regulated cell wall-degrading enzymes; 17-19 species recognized.
Pectobacterium carotovorum
Pectobacterium carotovorum (formerly Erwinia carotovora), a Gram-negative pectinolytic plant pathogen causing soft rot and potato blackleg; regulated by AHL quorum sensing, split into subspecies carotovorum, brasiliense, and odoriferum.
Pectoral nerve block II
The pectoral nerve block II (PECS II) is an ultrasound-guided nerve block of the chest wall, introduced in 2012 and used mainly as an opioid-sparing adjunct for breast surgery.
Pectoralis major
Pectoralis major, musculus pectoralis major, the large fan-shaped chest muscle running from clavicle, sternum, and ribs to the humerus; adducts, flexes, and medially rotates the arm, innervated by medial and lateral pectoral nerves, and widely used as a reconstructive flap.
Pectus carinatum
Pectus carinatum (pigeon chest) is a congenital chest wall deformity with outward sternal protrusion, second most common after pectus excavatum, male-predominant 3-4:1, treated first with orthotic bracing and secondarily by Ravitch or Abramson surgery.
Pectus excavatum
Pectus excavatum (funnel chest, sunken chest) is the most common congenital chest wall deformity, a concave sternum from abnormal costal cartilage growth, treated by Ravitch or Nuss surgery or vacuum bell therapy.
Peculiar velocity
A peculiar velocity is a galaxy's velocity remaining after the Hubble flow from the universe's uniform expansion is subtracted, caused by gravitational tugs from surrounding matter concentrations.
PED_HUIL0124 trial
PED_HUIL0124 (NCT06222229) is a Spanish multicenter randomized trial at Hospital Universitario Infanta Leonor comparing functional bandaging versus no immobilization in children aged 5-16 with mild ankle sprain, using OXAFQ-C and pain outcomes.
Pedaganjam Mound
Pedaganjam Mound is an ancient archaeological mound at Pedaganjam village in Andhra Pradesh, India, protected as a centrally protected monument by the Archaeological Survey of India.
Pedagogy
Pedagogy is the art and science of teaching, covering teaching methods, learning activities, assessment, and learning theory; also called the theory of instruction, distinct from curriculum and assessment.
Pedagogy of the Oppressed
Pedagogy of the Oppressed (Pedagogia do Oprimido) is a book by Brazilian educator Paulo Freire, written 1967 to 1968, arguing education either domesticates the oppressed or frees them.
Pedal steel guitar
Pedal steel guitar: electric lap-played steel guitar with foot pedals and knee levers changing string pitch, descended from Joseph Kekuku's Hawaiian steel guitar; E9 and C6 tunings, ten strings, defining voice of country music.
Pedaliaceae
Pedaliaceae R.Br., the sesame family, is a Lamiales family of mucilage-gland-covered herbs and shrubs from warm regions, with about 11 accepted genera including Sesamum (sesame), Harpagophytum (devil's claw), and the Malagasy Uncarina.
Pedasa
Pedasa (Pedasus, Pidasa), ancient Lelegian city at Gökçeler, Konacık, Bodrum, Turkey; founded 12th/11th century BC, famed for its Athena Sanctuary, fortified acropolis, and tumuli; the only systematically excavated Lelegian city.
Pedavegi
Pedavegi, also spelled Peddavegi, is a village in Andhra Pradesh, India, occupying the site of ancient Vengi, capital of the Salankayana, Vishnukundin, and Eastern Chalukya dynasties.
Peddi
Peddi (పెద్ది) is a 2026 Telugu sports action drama directed by Buchi Babu Sana, starring Ram Charan, Janhvi Kapoor, Shiva Rajkumar, and Jagapathi Babu, with A. R. Rahman's music. Released 4 June 2026 at 189 minutes, it follows an unrecognized village's cricketer fighting for official recognition; mixed reviews, IMDb 5.2/10, streaming on Netflix.
Peddler
Peddler (also pedlar; aliases cheapjack, higler, hawker): an itinerant trader selling goods door to door or on the street without fixed premises, historically central to goods distribution, now largely an informal-economy street-vending occupation governed by laws like the Pedlars Act 1871.
Peder Fredricson
Peder Fredricson, Swedish show jumper born 1972 in Flen, six-time Olympian, Tokyo 2020 team gold and individual silver on All In, Rio 2016 silver, 2021 world number one.
Peder Kongshaug
Peder Kongshaug (born 2001, Wimbledon) is a Norwegian speed skater from Stavanger, Olympic team pursuit gold medalist at Beijing 2022, 1500m world champion 2025, and Norwegian 1500m record holder.