All articles starting with P
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Psophocarpus tetragonolobus
Psophocarpus tetragonolobus, the winged bean or goa bean, is a twining tropical legume grown in hot, humid regions for its edible pods, seeds, leaves, and tubers.
Psoralea
Psoralea L. (fountainbush) is a Cape-centered legume genus in tribe Psoraleeae, described by Linnaeus in 1753, native Mozambique to South Africa, with about 129 species after absorbing Otholobium.
Psoralen
Psoralen is a plant-derived furocoumarin found in celery, figs, and parsley that becomes phototoxic under UVA light and is used in PUVA therapy for psoriasis and vitiligo.
Psoriasiform napkin dermatitis
Psoriasiform napkin dermatitis (PND), ICD-11 EH40.02, is a sharply marginated scaly diaper-area eruption of infancy resembling psoriasis; HLA studies and follow-up data distinguish it from true psoriasis, though some cases eventuate into napkin psoriasis.
Psoriasis
Psoriasis is a chronic immune-mediated inflammatory disease of skin, nails, and joints affecting 2-3% of people, driven by the IL-23/Th17 axis, with plaque, guttate, pustular, inverse, and erythrodermic types, treated with topicals, phototherapy, systemics, and biologics.
Psoriasis Area and Severity Index
Psoriasis Area and Severity Index (PASI), introduced by Fredriksson and Pettersson in 1978, is a 0–72 composite score grading erythema, induration, scaling, and area in four weighted body regions; the standard psoriasis trial endpoint (PASI 75/90/100).
Psoriasis susceptibility 1 candidate gene 2 protein
PSORS1C2 (SPR1, C6orf17) encodes a 136-amino-acid predicted secreted protein at 6p21.33 in the PSORS1 psoriasis locus, tissue-enriched in skin and implicated in keratinocyte cornification, with mixed evidence for a psoriasis role.
Psoriatic arthritis
Psoriatic arthritis (PsA) is a chronic inflammatory joint disease occurring in 7–42% of people with psoriasis, typically 7–10 years after skin symptoms, marked by dactylitis, enthesitis, and nail changes, treated with NSAIDs, DMARDs, biologics, and JAK inhibitors.
Psoriatic onychodystrophy
Psoriatic onychodystrophy (nail psoriasis, psoriatic nail dystrophy): nail deformity from psoriasis of the nail matrix or bed, affecting up to 90% of psoriasis patients over a lifetime, marked by pitting, oil-drop sign, onycholysis, and crumbling.
Psoriatic spondyloarthritis
Psoriatic spondyloarthritis (axial psoriatic arthritis, ICD-11 FA21.0) is spine and sacroiliac inflammation in psoriatic arthritis, affecting roughly 25–70% of PsA patients; clinically similar to axial spondyloarthritis but with psoriasis, nail, and dactylitis features.
Psorophora
Psorophora (Gang Mosquito) is a New World mosquito genus in tribe Aedini with 49 species in three subgenera, type species Ps. ciliata, floodwater breeding, painful bites, and Ps. columbiae as heartworm vector.
Psoroptic mange
Psoroptic mange, or sheep scab, is a highly contagious, pruritic skin disease of sheep, cattle, goats, rabbits, and wildlife caused by nonburrowing Psoroptes mites, chiefly P. ovis and P. cuniculi, treated with macrocyclic lactones and lime sulfur.
PSPACE
PSPACE is the complexity class of decision problems decidable using polynomial memory regardless of time; it contains P and NP, and Savitch's theorem shows nondeterminism adds nothing.
PSpice
PSpice is a commercial SPICE-based circuit simulator for analog and mixed-signal electronic circuits, originally developed by MicroSim Corporation and now sold by Cadence Design Systems as part of its PCB design toolset.
PSR B0329+54
PSR B0329+54, also cataloged as PSR J0332+5434, is a bright radio pulsar discovered at Cambridge in 1968, the brightest below 1 GHz in the northern hemisphere and a standard target for pulsar studies.
PSR B0355+54
PSR B0355+54 is a middle-aged radio pulsar about 3,400 light-years away in Perseus, whose supersonic motion has produced one of the most extensively studied pulsar wind nebulae in X-ray astronomy.
PSR B0525-66
PSR B0525-66 is a pulsar in the Large Magellanic Cloud, inside the supernova remnant LHA 120-N 49. It is associated with the gamma-ray event of March 5, 1979.
PSR B0525+21
PSR B0525+21, also cataloged as PSR J0528+2200, is a slowly rotating radio pulsar in Taurus near the Crab Nebula, with a spin period of about 3.7 seconds.
PSR B0540-69
PSR B0540-69 is a young 50 ms pulsar in the Large Magellanic Cloud, discovered in X-rays in 1984, known for a sudden spin-down rate transition in 2011.
PSR B0656+14
PSR B0656+14, also cataloged as PSR J0659+1414, is a middle-aged pulsar about 288 parsecs from the Sun and one of the Three Musketeers neutron stars, tied to the Monogem Ring remnant.
PSR B0740-28
PSR B0740-28, also cataloged as PSR J0742-2822, is a bright, young radio pulsar in the constellation Puppis, discovered in 1973, rotating once every 166.8 ms.
PSR B0809+74
PSR B0809+74 is a nearby radio pulsar at 0.43 kpc, bright from about 12 MHz to 10 GHz and known for drifting subpulses, nulling, and mode changing.
PSR B0823+26
PSR B0823+26, also cataloged as PSR J0826+2637, is a radio pulsar in the constellation Cancer with a 0.53-second spin period, discovered in 1968 and known for nulling.
PSR B0834+06
PSR B0834+06, also cataloged as PSR J0837+0610, is a bright radio pulsar in the constellation Cancer and one of the first four pulsars discovered, in 1968.
PSR B0950+08
PSR B0950+08, also cataloged as PSR J0953+0755 and originally CP 0950, is a nearby radio pulsar discovered in 1968, with a spin period of about 253 milliseconds.
PSR B1055-52
PSR B1055-52 is a middle-aged radio, X-ray, and gamma-ray pulsar in the constellation Carina, discovered in 1972, notable for emitting about half its radiant energy as gamma-rays.
PSR B1133+16
PSR B1133+16 is a bright, nearby radio pulsar, the brightest of the first four pulsars discovered at Cambridge in 1968, known for its double-peaked profile.
PSR B1237+25
PSR B1237+25 is an isolated ordinary radio pulsar spinning once every 1.3824 seconds, best known as the textbook example of a five-component core/double-cone pulse profile and a long-studied laboratory for mode changing and nulling.
PSR B1257+12
PSR B1257+12, known as the Lich pulsar, is a millisecond pulsar in Virgo whose three confirmed planets, found by pulse timing in 1992, were the first discovered outside the Solar System.
PSR B1257+12 C
PSR B1257+12 C, officially named Poltergeist, is a super Earth exoplanet orbiting the pulsar PSR B1257+12, announced in 1992 as one of the first planets found outside the Solar System.