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Topics referred to by the same term
PPMS can refer to: Primary Progressive Multiple Sclerosis Pilgrim Park Middle School, Wisconsin PMMS This disambiguation page lists articles associated
PPMS
Topics referred to by the same term
Look up PPM or ppm in Wiktionary, the free dictionary. PPM may refer to: Planned preventive maintenance Project portfolio management Public performance
PPM
Quasi-peak audio level meter originally developed in the 1930s
designed for monitoring analogue audio signals, these PPMs are now also used with digital audio. PPMs do not provide effective loudness monitoring. Newer
Peak_programme_meter
for each chemical element shown as mg/kg, or parts per million (ppm) by mass (10,000 ppm = 1%). The Earth's crust is one "reservoir" for measurements of
Abundance of elements in Earth's crust
Abundance_of_elements_in_Earth's_crust
Disease that damages the myelin sheaths around nerves
isolated syndrome (CIS) Relapsing-remitting MS (RRMS) Primary progressive MS (PPMS) Secondary progressive MS (SPMS) CIS can be characterised as a single lesion
Multiple_sclerosis
Data compression technique
Prediction by partial matching (PPM) is an adaptive statistical data compression technique based on context modeling and prediction. PPM models use a set of previous
Prediction by partial matching
Prediction_by_partial_matching
Water that contains a high concentration of dissolved salts
000 to 10,000 ppm (0.3–1%); and in highly saline water is 10,000 to 35,000 ppm (1–3.5%). Seawater has a salinity of roughly 35,000 ppm, equivalent to
Saline_water
Astronomical catalogue
The PPM Star Catalogue (Positions and Proper Motions Star Catalogue) is the successor of the SAO Catalogue. It contains precise positions and proper motions
PPM_Star_Catalogue
Chemical compound
atmosphere at 428 parts per million (ppm), or about 0.043% (as of July 2025) having risen from pre-industrial levels of 280 ppm or about 0.028%. Burning fossil
Carbon_dioxide
Set of units to describe small values
no associated units of measurement. Commonly used are parts-per-million – ppm, 10−6 parts-per-billion – ppb, 10−9 parts-per-trillion – ppt, 10−12 parts-per-quadrillion
Parts-per_notation
Earth's most severe extinction event
to 2,500 ppm (for comparison, the concentration immediately before the Industrial Revolution was 280 ppm, and the amount today is about 426 ppm). There
Permian–Triassic extinction event
Permian–Triassic_extinction_event
Medical condition
topical atropine to dilate the pupil may help break down PPMs.[citation needed] In dogs, PPM is inherited in the Basenji but can occur in other breeds
Persistent_pupillary_membrane
Very light rail manufacturer
year. PPMs were demonstrated on narrow gauge railways (Welshpool and Llanfair Light Railway, Ffestiniog Railway, and Welsh Highland Railway). PPMs utilise
Parry_People_Movers
Audio signal level measurement device
material more closely than the more modern and initially more expensive PPMs.[citation needed] For this reason, many audio practitioners[who?] prefer
VU_meter
million (ppm), compared to iron with 50,000 ppm, copper with 70 ppm, lead with 16 ppm, arsenic with 5 ppm, silver with 0.1 ppm, and gold with 0.005 ppm. Ancient
Tin sources and trade during antiquity
Tin_sources_and_trade_during_antiquity
Third planet from the Sun
reducing CO2 concentration to levels lethally low for current plants (10 ppm for C4 photosynthesis) in approximately 100–900 million years. A lack of
Earth
Organic monomer
ppm (rat, 4 hr) 4447 ppm (mouse, 2 hr) 3750 ppm (rat) 4808 ppm (mammal) LCLo (lowest published) 4400 ppm (rat, 8 hr) 4400 ppm (rabbit, 8 hr) 4207 ppm
Methyl_methacrylate
Toolkit for manipulation of images
format (PBM) portable graymap format (PGM) portable pixmap format (PPM) PBM, PGM and PPM, sometimes collectively referred to as the portable anymap format
Netpbm
distribution comes with PPM included, other distributions can use PPM after acquiring and building PPM module from CPAN. PPM uses so called “PPM Repositories”,
Perl_package_manager
Chemical element with atomic number 91 (Pa)
of about 0.3–3 parts 231Pa per million parts (ppm) of ore. Whereas the usual content is closer to 0.3 ppm (e.g. in Jáchymov, Czech Republic), some ores
Protactinium
Process of extracting tin from the ground
element in the Earth's crust, with approximately 2 ppm (parts per million), compared to iron with 50,000 ppm. Tin extraction and use can be dated to the beginnings
Tin_mining
Chemical compound
25 ppm; for exposure of 1 hour is 400 ppm. Ammonia is an irritant and irritation increases with concentration; the permissible exposure limit is 25 ppm,
Ammonia
Proprietary electronic system used for radio and television ratings gathering
The Portable People Meter (PPM), also known as the Nielsen Meter, is a system developed by Arbitron (now Nielsen Audio) to measure how many people are
Portable_People_Meter
Subset of artificial intelligence
examine three representative lossless compression methods, LZW, LZ77, and PPM. According to AIXI theory, a connection more directly explained in Hutter
Machine_learning
Natural satellite orbiting Earth
The spacecraft showed that concentrations may possibly be as high as 1,000 ppm. Using the mapper's reflectance spectra, indirect lighting of areas in shadow
Moon
American film director
DaSilva was diagnosed with primary progressive multiple sclerosis (PPMS). PPMS is an accelerated form of multiple sclerosis that has a steady worsening
Jason_DaSilva
Portuguese political alliance
AD – Democratic Alliance and also included the People's Monarchist Party (PPM). Marcelo Rebelo de Sousa led a failed attempt to establish a new Democratic
Democratic Alliance (Portugal, 2024)
Democratic_Alliance_(Portugal,_2024)
American corporation
through three divisions: Hexagon Asset Lifecycle Intelligence (ALI, formerly PPM), Hexagon Safety & Infrastructure, and Hexagon Geospatial. The company's
Intergraph
Instrument which measures very small variations in the Earth's magnetic field
and at sea to locate wrecked ships, sometimes for recreational diving. PPMs were once widely used in mineral exploration. They have largely been superseded
Proton_magnetometer
Poisonous and flammable gas
petrochemical workers, are set to alarm at as low as 5 to 10 ppm and to go into high alarm at 15 ppm. Metabolism causes oxidation to sulfate, which is harmless
Hydrogen_sulfide
American folk singer (1936–2009)
Mary Allin Travers (November 9, 1936 – September 16, 2009) was an American singer who found fame as a member of the 1960s folk trio Peter, Paul and Mary
Mary_Travers
NMR via protons, hydrogen-1 nuclei
The 2.5 ppm + 3.5 Hz signal will be split into 2.5 ppm + 7 Hz and 2.5 ppm. The 2.5 ppm − 3.5 Hz signal will be split into 2.5 ppm and 2.5 ppm − 7 Hz.
Proton nuclear magnetic resonance
Proton_nuclear_magnetic_resonance
Eclipsing binary in the constellation Taurus
Other designations V1094 Tau, AG+21 394, BD+21 605, HD 284195, SAO 76494, PPM 93323, CCDM J04121+2157, WDS J04121+2157, TYC 1263-642-1, GSC 01263-00642
V1094_Tauri
Human-caused changes to climate on Earth
produce atmospheric CO2 concentrations that range widely between 380 and 1400 ppm. The environmental effects of climate change are broad and far-reaching,
Climate_change
Chemical compound hydrogen phosphide
respiratory poison, and is immediately dangerous to life or health at 50 ppm. Phosphine has a trigonal pyramidal structure. Phosphines are compounds that
Phosphine
Chemical acid found in vinegar
(eight hours) to acetic acid vapours at 10 ppm can produce some irritation of eyes, nose, and throat; at 100 ppm marked lung irritation and possible damage
Acetic_acid
Medical condition
as toxic pneumonitis or pulmonary edema, with concentrations around 400 ppm and beyond potentially fatal. Chronic exposure to low levels can result in
Chlorine_gas_poisoning
American biotechnology corporation
multiple sclerosis (RRMS) and primary progressive multiple sclerosis (PPMS). The PPMS form of the disease previously had no approved treatments. 2017: Hemlibra
Genentech
Chemical compound
characteristic odor that is detectable at concentrations as low as 0.08 ppm. As an aromatic hydrocarbon, naphthalene's structure consists of a fused
Naphthalene
Liquid fuel used in diesel engines
the 1990s specifications allowed a content of 2000 ppm max of sulfur, reduced to a limit of 350 ppm by the beginning of the 21st century with the introduction
Diesel_fuel
median lethal concentration (LC50) in air of more than 200 parts per million (ppm) but not more than 2,000 parts per million by volume of gas or vapor, or
List_of_highly_toxic_gases
Portuguese politician
People's Monarchist Party (PPM) since 2017. He was a member of the Lisbon Municipal Assembly between 2009 and 2013, nominated by the PPM as part of the "Lisboa
Gonçalo_da_Câmara_Pereira
Chemical compound
exhibits resonances at 2.91 ppm (m), 1.75 ppm (m), and 0.63 ppm (m) at an intensity of 22% of the reference resonance at 0 ppm. Sodium trimethylsilyl propionate
DSS_(NMR_standard)
Water that has a high mineral content
116 ppm Calgary, Alberta: 165 ppm[citation needed] Regina, Saskatchewan: 496 ppm Saskatoon, Saskatchewan: 160–180 ppm Winnipeg, Manitoba: 77 ppm Toronto
Hard_water
Brightest star in the constellation Orion
Rigel is a blue supergiant star in the equatorial constellation of Orion. It has the Bayer designation β Orionis, which is Latinized to Beta Orionis and
Rigel
Organic compound (H–CHO); simplest aldehyde
05 ppm formaldehyde for hardwood plywood, 0.09 ppm formaldehyde for particleboard, 0.11 ppm formaldehyde for medium-density fiberboard, and 0.13 ppm formaldehyde
Formaldehyde
Portuguese football manager (born 1963)
Managerial record by team and tenure Team From To Record PPM Ref. P W D L GF GA GD Win % Benfica 20 September 2000 5 December 2000 11 6 3 2 17 9 +8 054
José_Mourinho
Extremely bitter chemical compound
chemical compounds known, with bitterness thresholds of 0.05 ppm for the benzoate and 0.01 ppm for the saccharinate. Commercially, it is usually available
Denatonium
American aviator, aerospace engineer and business magnate (1905–1976)
Pseudoaddiction" (PDF). Practical Pain Management. 6 (7). Montclair, New Jersey: PPM Communications, Inc.: 12–29. Archived from the original (PDF) on September
Howard_Hughes
PPM America, Inc. is a U.S.-based investment management firm that is registered with the SEC as an investment advisor. It managed $9.7 billion assets
PPM_America,_Inc.
Double star system in the constellation Cygnus
Albireo /ælˈbɪrioʊ/ is a double star designated Beta Cygni (β Cygni, abbreviated Beta Cyg, β Cyg). The International Astronomical Union uses the name "Albireo"
Albireo
Binary star in the constellation of Canes Venatici
Cor Caroli /ˌkɔːr ˈkærəlaɪ/ is a binary star in the northern constellation of Canes Venatici. It is the brightest star in the constellation, lying at the
Cor_Caroli
Chemical element with atomic number 79 (Au)
(ppm) can be economical. Typical ore grades in open-pit mines are 1–5 ppm; ore grades in underground or hard rock mines are usually at least 3 ppm. Because
Gold
Island country in South Asia
of the Maldives. In 2018, the then ruling Progressive Party of Maldives (PPM)'s tensions with opposition parties and the subsequent crackdown was termed
Maldives
Large body of salt water
recovered from the Dead Sea, where it occurs at 55,000 parts per million (ppm). Desalination is the technique of removing salts from seawater to leave
Sea
Chemical compound
Zoamix. Dinitolmide is usually added to feed in doses of 125 ppm (preventive) or 250 ppm (curative). It is a broad-spectrum anticoccidial drug, preventing
Dinitolmide
Triatomic oxygen molecule
chlorine, and detectable by many people at concentrations of as little as 0.1 ppm in air. Ozone's O3 structure was determined in 1865. The molecule was later
Ozone
Atmospheric constituent and greenhouse gas
2026, the concentration of carbon dioxide in the atmosphere reached 432 ppm or 0.0432% (on a molar basis), representing a mass of 3380 gigatonnes. This
Carbon dioxide in the atmosphere of Earth
Carbon_dioxide_in_the_atmosphere_of_Earth
Physical constant for the strength of gravity induced by a mass
cited with a relative standard uncertainty of 0.046% (460 ppm), lowered to 0.012% (120 ppm) by 1986. But the continued publication of conflicting measurements
Gravitational_constant
Speed of electromagnetic waves in vacuum
−280 ppm 1926 Albert A. Michelson, rotating mirror 299796000±4000 +12 ppm 1950 Essen and Gordon-Smith, cavity resonator 299792500±3000 +0.14 ppm 1958
Speed_of_light
Chemical element with atomic number 29 (Cu)
been reported to be at least 3 ppm in the diet. However, higher concentrations of copper (100 ppm, 200 ppm, or 500 ppm) in the diet of rabbits may favorably
Copper
Scale for measuring spiciness of peppers
dried pepper mass. This "parts per million of heat" (ppmH) is found with the following calculation: ppmH = peak area ( capsaicin ) + 0.82 ⋅ peak area ( dihydrocapsaicin)
Scoville_scale
Radioactive isotope of potassium
potassium, with a half-life of 1.248 billion years. It makes up about 117 ppmTooltip parts-per-million of natural potassium, making that mixture very weakly
Potassium-40
Type of fuel
Ultra-low-sulfur diesel (ULSD) is [./10 ppm Diesel diesel fuel] with substantially lowered sulfur content. Since 2006, almost all of the petroleum-based
Ultra-low-sulfur_diesel
Second-longest river in Europe
with average bottom gradient 0.12% (1200 ppm), from Passau to Devín Gate the gradient lessens to 0.06% (600 ppm). Middle Section: From Devín Gate to Iron
Danube
Brightest star in the constellation Auriga
24608, HR 1708, SAO 40186, PPM 47925, ADS 3841, CCDM J05168+4559, WDS 05167+4600, LTT 11619, NLTT 14766 A: GJ 194 HL: GJ 195 H: PPM 47938, G 96-29, LTT 11622
Capella
Contagious disease caused by SARS-CoV-2
sodium hypochlorite 0.5% hydrogen peroxide 0.2–7.5% povidone-iodine 50–200 ppm hypochlorous acid Other solutions, such as benzalkonium chloride and chlorhexidine
COVID-19
American racing driver
2011, Mr. Geisler raced at his two home tracks: Lernerville Speedway and PPMS. Lynn Geisler won at least one race a year at Lernerville Speedway from 1982
Lynn_Geisler
Hydrocarbon compound (C6H6)
parts of air (1 ppm) in the workplace during an 8-hour workday, 40-hour workweek. The short term exposure limit for airborne benzene is 5 ppm for 15 minutes
Benzene
Measure of water hardness
parts per million calcium carbonate ( ppm CaCO 3 or grams CaCO 3 per litre|mg/L). One dKH is equal to 17.848 mg/L (ppm) CaCO 3, e.g. one dKH corresponds to
Carbonate_hardness
American technology company
Asset Management, Software Asset Management, Project Portfolio Management (PPM), Conversational AI virtual support agents, and Integration Platform as a
TeamDynamix
Chemical compound
diseases. The LC50 (median lethal dose) for humans has been estimated to be 174 ppm for a 1-hour exposure. It is also included in the NOx family of atmospheric
Nitrogen_dioxide
limited to an annual average of 10 ppm sulfur, with a maximum of 80 ppm allowed per batch at the refinery gate and up to 95 ppm downstream. At this point, nearly
Petroleum refining in the United States
Petroleum_refining_in_the_United_States
Pharmaceutical compound
remarkably high levels of NMPEA (~2300–5300 ppm). NMPEA is also present at low concentrations (< 10 ppm) in a wide range of foodstuffs. NMPEA is a positional
N-Methylphenethylamine
Flammable liquid hydrocarbon mixture
set a recommended exposure limit (REL) of 100 ppm (400 mg/m3) over an 8-hour workday. At levels of 1000 ppm, which equates to 10 times the lower exposure
Naphtha
Monarchist political party in Portugal
Duarte Pio of Braganza, succeeding him as the royal pretender. In 1979 the PPM entered an electoral pact with the Social Democratic Party and CDS – People's
People's Monarchist Party (Portugal)
People's_Monarchist_Party_(Portugal)
Indian police officer and politician
Rajeev Kumar (born 31 January 1966) IPS PPM is a retired Indian police officer and bureaucrat, who is currently serving as a member of the Rajya Sabha
Rajeev Kumar (politician, former police officer)
Rajeev_Kumar_(politician,_former_police_officer)
Defunct socialist party in Mexico
abbreviated PPM) was a Marxist, Socialist political party in Mexico, founded in 1977. PPM was led by Alejandro Gascón Mercado [Wikidata]. PPM was mainly
Mexican_People's_Party
Liquid distilled from pine resin
(permissible exposure limit) for turpentine exposure in the workplace as 100 ppm (560 mg/m3) over an 8-hour workday. The same threshold was adopted by the
Turpentine
Project management software company
traded company that develops and provides project portfolio management (PPM) cloud software applications, a type of enterprise software that supports
Planisware
International environmental NGO
grassroots movement. The 350 in the name stands for 350 parts per million (ppm) of carbon dioxide (CO2), which has been identified as a safe upper limit
350.org
Physical constant relating particle kinetic energy with temperature
1 ppm, and at least one measurement from a second technique with a relative uncertainty below 3 ppm. The acoustic gas thermometry reached 0.2 ppm, and
Boltzmann_constant
Organic compound; 6-sided hydrocarbon ring
ppm (mouse, 2 h) 26,600 ppm (rabbit, 1 h) NIOSH (US health exposure limits): PEL (Permissible) TWA 300 ppm (1050 mg/m3) REL (Recommended) TWA 300 ppm
Cyclohexane
Class of enzymes
sequence homology to ancient PPP enzymes. The current assumption is that PPMs evolved separately from PPPs but converged during evolutionary development
Protein_phosphatase
Hydroponic nutrient solution
210 ppm P 31 ppm S 64 ppm Cl 0.14 ppm / 0.65 ppm B 0.11 ppm / 0.5 ppm Na 0 ppm / 0.023 ppm / 1.2 ppm* Mg 48.6 ppm K 235 ppm Ca 200 ppm / 160 ppm Mn 0
Hoagland_solution
Healthcare management company
buying up other PPM business around the country. In August 1995, MedPartners announced the acquisition of Mullikin Medical Enterprises, a PPM company based
CVS_Caremark
Chemical compound
Governmental Industrial Hygienists is 0.02 ppm. MIC is toxic by inhalation, ingestion and contact in quantities as low as 0.4 ppm. Exposure symptoms include coughing
Methyl_isocyanate
Series of Sport Utility Vehicles (SUVs)
version) is detuned for Euro III-compliance so the low-quality diesel fuel (500 ppm), most common in African and Central Asian countries, can be used. The engine
Mercedes-Benz_G-Class
Form of signal modulation using time shifts
Pulse-position modulation (PPM) is a form of signal modulation in which M message bits are encoded by transmitting a single pulse in one of 2 M {\displaystyle
Pulse-position_modulation
Command-line software
images from PDF files. pdfimages can extract images embedded within PDFs as PPM/PBM, PNG, TIFF, JPEG, JPEG2000, and JBIG2 files and can convert and output
Pdfimages
Colorless gas with the formula NO
set a recommended exposure limit (REL) of 25 ppm (30 mg/m3) over an 8-hour workday. At levels of 100 ppm, nitric oxide is immediately dangerous to life
Nitric_oxide
Toxic gaseous compound (COCl2)
like rotten banana peels. The odor detection threshold for phosgene is 0.4 ppm, four times the threshold limit value (time weighted average). Its high toxicity
Phosgene
Hydrocarbon compound; precursor to styrene and polystyrene
per million (ppm) for one day or 3 ppm for ten days is not expected to have any adverse effect in children. Lifetime exposure of 0.7 ppm ethylbenzene
Ethylbenzene
Series of interconnected biochemical reactions
temperatures are moderate, carbon dioxide concentrations are around 200 ppm or higher, and groundwater is plentiful. The C3 plants, originating during
C3_carbon_fixation
Star in the constellation Aquarius
Alpha Aquarii is a yellow supergiant star in the constellation of Aquarius. Its identifier is a Bayer designation that is Latinized from α Aquarii, and
Alpha_Aquarii
Capital city of India
At NSUT, located in Sector 3, Dwarka, pollution levels were as low as 93 PPM.[citation needed] On 7 November 2017, the Indian Medical Association declared
New_Delhi
Star in the constellation Microscopium
Alpha Microscopii (α Microscopii) is a star in the southern constellation of Microscopium. It is visible to the naked eye with an apparent visual magnitude
Alpha_Microscopii
Capital of Telangana, India
PM2.5's. Ground water around Hyderabad, which has a hardness of up to 1000 ppm, around three times higher than is desirable, is the main source of drinking
Hyderabad
Body of salt water covering most of Earth
acidification, with atmospheric carbon dioxide (CO2) levels exceeding 410 ppm (in 2020). CO2 from the atmosphere is absorbed by the oceans. This produces
Ocean
Capital and largest city of Portugal
for Lisbon city hall, 1976–2025 Election BE PCP APU CDU PS HR PAN PSD CDS PPM CR IL CH O/I Turnout 1976 20.7 35.5 15.2 19.0 0.4 9.2 66.5 1979 25.1 23.4
Lisbon
PPMS
PPMS
PPMS
PPMS
Girl/Female
American, Arabic, Australian, British, Danish, English, Finnish, French, Greek, Indian, Jamaican, Japanese, Muslim, Russian, Telugu, Ukrainian
Defending Men; .molody Feminine of Alexander; Defender and Helper of Mankind; Feminine of Alexander; Defender of Mankind
Girl/Female
Indian, Telugu
Beauty Peasant Attraction
Girl/Female
Tamil
Fog, Honey dow
Boy/Male
American, Australian, British, English
Field Belonging to Mack
Female
English
 Feminine form of English Vernon, VERNA means "place of alder trees."Â
Girl/Female
Christian & English(British/American/Australian)
White Wave
Girl/Female
Polish Irish
Bitter.
Boy/Male
American, Anglo, British, English, German, Norse
Ruler of All; Rule with Mercy; Ruler
Surname or Lastname
English (South Wales)
English (South Wales) : patronymic from Noe.
Girl/Female
British, English
Holy Book
PPMS
PPMS
PPMS
PPMS
PPMS