All articles starting with P
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PSAP
PSAP (prosaposin; also GLBA, SAP1, SAP2) is a human gene at 10q22.1 encoding prosaposin, cleaved into lysosomal saposins A–D that activate sphingolipid hydrolases; mutations cause combined PSAP deficiency, metachromatic leukodystrophy, Krabbe, and atypical Gaucher disease.
PsAPASH syndrome
PsAPASH syndrome (ORPHA:641390), a rare autoinflammatory disorder combining psoriatic arthritis, pyoderma gangrenosum, acne, and hidradenitis suppurativa; first described 2015, adult onset, prevalence under 1 per million, no linked mutations, treated with TNF-alpha and IL-17 inhibitors.
Psara (Ψαρά)
Psara (Ψαρά) is a small Greek island in the northeastern Aegean, about 10 nautical miles northwest of Chios, area 42 km2, in the Regional Unit of Chios. Known for its fireship fleet in the Greek War of Independence and its destruction by Ottoman forces on June 21-22, 1824.
PSAT/NMSQT
The PSAT/NMSQT, or Preliminary SAT, is a standardized digital test for US high school students, cosponsored by the College Board, that qualifies them for National Merit Scholarships.
Psathyrellaceae
Psathyrellaceae is a family of Agaricales mushrooms, also called brittlestems and ink caps, proposed by Redhead et al. in 2001; type genus Psathyrella (400-600 species), with Coprinellus, Coprinopsis, Parasola, and Candolleomyces; Psathyrella is polyphyletic and deliquescence evolved repeatedly.
PsbP, C-terminal
PsbP, C-terminal: the conserved alpha/beta/alpha C-terminal domain of PsbP, the 23 kDa extrinsic photosystem II protein; carries His-144/Asp-165, supports the central beta-sheet, and mediates PSII binding.
PSCA
PSCA (prostate stem cell antigen, PRO232) is a GPI-anchored Thy-1/Ly-6 family cell surface glycoprotein on chromosome 8q24.2, overexpressed in prostate, bladder, and pancreatic cancer and targeted by PSCA-CAR T cell trials.
PSCA (gene)
PSCA (prostate stem cell antigen) gene, chromosome 8q24.2, encodes a 123-aa GPI-anchored Thy-1/Ly-6 cell surface protein overexpressed in prostate, bladder, and pancreatic cancers; rs2294008 links it to gastric and bladder cancer risk.
PSCAD
PSCAD (Power Systems Computer Aided Design) is a graphical simulation environment for power systems electromagnetic transient studies, serving as the front end to the EMTDC simulation engine.
PSCAT study
PSCAT (Prediction Study of Complications After Severe Trauma), NCT01713205, is a Chinese multicenter observational study led by Jiang Jianxin, Daping Hospital, enrolling about 3,500 severe trauma patients from 2012 to predict sepsis and MODS complications using biomarkers.
PSE&G
PSE&G, formally Public Service Electric and Gas Company, is a New Jersey utility delivering electricity and natural gas to about 2.4 million electric and 1.9 million gas customers.
PSE&G Gas System Modernization Program
The PSE&G Gas System Modernization Program is a New Jersey Board of Public Utilities approved program under which PSE&G replaces aging gas mains, running since 2015.
PSEG
Public Service Enterprise Group (PSEG) is a New Jersey utility holding company founded in 1903, operating the state's largest electric and gas utility and nuclear plants.
PSEG Linden generating station
The PSEG Linden generating station is a natural gas-fired combined cycle power plant in Linden, New Jersey, built by PSEG and sold to ArcLight's Alpha Generation in 2021.
PSEG Long Island
PSEG Long Island, a subsidiary of Public Service Enterprise Group, has operated the Long Island Power Authority's electric grid, serving about 1.1 million customers, since 2014.
PSEG Nuclear
PSEG Nuclear is the nuclear subsidiary of New Jersey utility PSEG, operating the Salem and Hope Creek plants, which supply about 40% of the state's electricity.
PSEN1
PSEN1 (presenilin 1, AD3, PS1, S182) is a chromosome 14 gene encoding the catalytic subunit of γ-secretase; its mutations are the leading cause of autosomal dominant early-onset Alzheimer's disease, with onset ages 30–60 and complete penetrance.
PSEN2
PSEN2 (presenilin 2, AD4) is a chromosome 1 gene encoding a γ-secretase catalytic subunit; mutations such as N141I and M239V cause early-onset familial Alzheimer's disease with onset at 40 to 70 years.
Psephology
Psephology is the statistical study of elections and voting behavior, from Greek psephos (pebble). Coined at Oxford around 1951 by R.B. McCallum and David Butler; covers polls, results analysis, and forecasting.
Pseudallescheria
Pseudallescheria is a genus of ascomycetous fungi in the order Microascales, found in soil, best known through Pseudallescheria boydii and synonymized under Scedosporium in 2014.
Pseudechis
Pseudechis, Australian black snakes, including the mulga snake or king brown (Pseudechis australis), is an elapid snake genus from Australia and southern New Guinea with PLA2-rich anticoagulant venoms, except the procoagulant red-bellied black snake.
Pseudemys
Pseudemys, the river cooters, is a North American genus of freshwater basking turtles in Emydidae, related to Trachemys and Graptemys, with seven to eight contested species and an unstable phylogeny.
Pseudepigrapha
Pseudepigrapha (singular: pseudepigraphon) are ancient Jewish and early Christian religious writings attributed to Old Testament figures like Enoch and Moses, dating mainly from the Second Temple period.
Pseudo Echo
Pseudo Echo: Melbourne new wave/synth-pop band formed 1982 by Brian Canham and Pierre Gigliotti; Funky Town cover hit No. 1 in Australia 12 weeks; albums Autumnal Park, Love an Adventure, Race; reunited 1998.
Pseudo-continuous arterial spin labeling
Pseudo-continuous arterial spin labeling (pCASL) is an MRI technique that labels arterial blood water with radiofrequency pulses to map brain blood flow without contrast agents, recommended for clinical use.
Pseudo-Cushing syndrome
Pseudo-Cushing syndrome, also called non-neoplastic hypercortisolism, is tumor-free HPA-axis-driven hypercortisolism from obesity, depression, alcoholism, PCOS, diabetes, or stress, mimicking true Cushing syndrome and reversing when the underlying condition is treated.
Pseudo-Dionysius the Areopagite
Pseudo-Dionysius the Areopagite, also called Pseudo-Denys, is the anonymous author of the Corpus Areopagiticum, Greek Christian writings composed around 500 CE and long attributed to St Paul's Athenian convert.
Pseudo-dynamic testing
Pseudo-dynamic testing is an earthquake engineering method in which inertia and damping are modeled numerically while the restoring force is physically measured from a test specimen, allowing full-scale seismic testing without a shake table.
Pseudo-halide anion engineering in perovskites
Pseudo-halide anion engineering is a perovskite solar cell strategy that introduces halide-like polyatomic anions, mainly thiocyanate and formate, to passivate defects and has enabled efficiencies exceeding 25%.
Pseudo-labeling
Pseudo-labeling is a semi-supervised learning technique in which a model treats its most confident predictions on unlabeled data as true labels, introduced for deep networks by Dong-Hyun Lee in 2013.