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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
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
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
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
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
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
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
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
Quasi-peak audio level meter originally developed in the 1930s
programme meter (PPM) is an instrument used in professional audio that indicates the level of an audio signal. Different kinds of PPM fall into broad categories:
Peak_programme_meter
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
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
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
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
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)
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
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)
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
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
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
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)
Political party in the Maldives from 2011 to 2025
Progressive Party of Maldives (Dhivehi: ޕްރޮގްރެސިވް ޕާރޓީ އޮފް މޯލްޑިވްސް, PPM), was a political party in the Maldives. The stated goal of the party was
Progressive_Party_of_Maldives
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
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
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.
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
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
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
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
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
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
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
Meteorite composed of iron-nickel alloy called meteoric iron
55–100 ppm Ga, 190–520 ppm Ge, 0.6–5.5 ppm Ir, Ge-Ni correlation negative. IB: Ataxites and medium octahedrites, 8.7–25% Ni, 11–55 ppm Ga, 25–190 ppm Ge,
Iron_meteorite
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
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
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
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
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
Chemical compound
conditions. It is the most toxic selenium compound with an exposure limit of 0.05 ppm over an 8-hour period. Even at extremely low concentrations, this compound
Hydrogen_selenide
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
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
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
Hypothetical representation of potential future conditions
often quantified in terms of "parts-per-million carbon dioxide equivalent" (ppm CO2e), or the increment/decrement in carbon dioxide concentrations which
Climate_change_scenario
Political party in Martinique
The Martinican Progressive Party (French: Parti progressiste martiniquais, PPM) is a democratic socialist political party in Martinique. It was founded
Martinican_Progressive_Party
Water hardness measurement
translates into 1 part in about 58,000 parts of water or 17.1 parts per million (ppm). Also called Clark degree (in terms of an imperial gallon). Calcium and
Grain_per_gallon
Chemical compound of sulfur and oxygen
per million (ppm). In the US, the OSHA set the PEL at 5 ppm (13 mg/m3) time-weighted average. Also in the US, NIOSH set the IDLH at 100 ppm. In 2010, the
Sulfur_dioxide
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
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
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
Analytical technique
range of about 800 ppm. For organofluorine compounds the range is narrower, being about −50 to −70 ppm (for CF3 groups) to −200 to −220 ppm (for CH2F groups)
Fluorine-19 nuclear magnetic resonance spectroscopy
Fluorine-19_nuclear_magnetic_resonance_spectroscopy
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
Organic compounds with the formula (CH3)2C6H4
concentrations as low as 0.08 to 3.7 ppm (parts of xylene per million parts of air) and can be tasted in water at 0.53 to 1.8 ppm. Xylenes form azeotropes with
Xylene
Organic compound (C6H5OH)
taste of the distinctive Islay scotch whisky, generally ~30 ppm, but it can be over 160 ppm in the malted barley used to produce whisky. This amount is
Phenol
Centralized management of project management processes
Project portfolio management (PPM) is the centralized management of the processes, methods, and technologies used by project managers and project management
Project_portfolio_management
Chemical compound
It is a dense colorless liquid with a faint, sweet odor, detectable at 10 ppm. It is a widely used and sometimes-controversial fumigant. The combustion
1,2-Dibromoethane
Colorless flammable liquid with an ammonia-like odor
Recommended Exposure Limit (REL): 0.03 ppm (0.04 mg/m3) 2-hour ceiling OSHA Permissible Exposure Limit (PEL): 1 ppm (1.3 mg/m3) 8-hour time-weighted average
Hydrazine
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
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
Chemical compound
up to 1410 ppm (~0.14%wt), and at levels up to 279 ppm (~0.03%wt) in off the shelf cosmetic products. Levels of 1,4-dioxane exceeding 85 ppm (~0.01%wt)
1,4-Dioxane
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
Very light rail manufacturer
Parry People Movers Ltd. (PPM) was a small British manufacturer of lightweight railcars that use flywheel energy storage for traction, allowing electric
Parry_People_Movers
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
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
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
Organobromine pesticide
death vary from 1,600 to 60,000 ppm, depending on the duration of exposure (as a comparison exposure levels of 70 to 400 ppm of carbon monoxide cover the
Bromomethane
Paint containing lead compounds as pigments
its use in paint to 600 parts per million (ppm). An amendment taking effect in May 2025 modified this to 90 ppm. The amendment also included all industrial
Lead_paint
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
Hydrocarbon-based solvent mixture enriched with C6 alkanes
function in the 500 ppm n-hexane group, slightly impaired in the 200 ppm n-hexane group and petroleum benzine II group (containing 500 ppm n-hexane), and barely
Petroleum_benzine
Brand of inkjet printers by HP
introduced in 1993, offering 6 ppm B&W, and 1 ppm color. This was replaced by the HP DeskJet 1600C (1995), offering 9 ppm B&W, and 4 ppm color, which offered a
HP_DeskJet
Chemical compound
concentration of 100–200 ppm in breathing air will kill a human within 10 to 60 minutes. A hydrogen cyanide concentration of 2000 ppm (about 2380 mg/m3) will
Hydrogen_cyanide
Democrats, the CDS – People's Party (CDS–PP) and People's Monarchist Party (PPM), with the parliamentary support of CHEGA since late 2020. The Liberal Initiative
2024 Azorean regional election
2024_Azorean_regional_election
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
Chemical compound
limit value (TLV) for worker exposure is 20 ppm, which is well above the odor detection threshold of 0.4 ppm. Blood or urine concentrations of 2-butoxyethanol
2-Butoxyethanol
Political party in Portugal
(PSD), CDS – People's Party (CDS–PP) and the People's Monarchist Party (PPM). It existed between 1979 and 1983, and was refounded for the 2024 legislative
Democratic Alliance (Portugal, 1979)
Democratic_Alliance_(Portugal,_1979)
Ghost town in Missouri, United States
contained 3–5 parts per million (ppm) of dioxin, NEPACCO was able to reduce the concentration of dioxin in hexachlorophene to 0.1 ppm. The result of this purification
Times_Beach,_Missouri
Term for gas with significant amounts of hydrogen sulfide
H2S per cubic meter of natural gas, which is equivalent to approximately 4 ppm by volume under standard temperature and pressure. However, this threshold
Sour_gas
Chemical compound
occupational exposure limit for DCM of 100 ppm (8-hour time-weighted average) and a short-term exposure limit of 200 ppm for a 15-minute period. The European
Dichloromethane
Medical condition
Persistent pupillary membrane (PPM) is a condition of the eye involving remnants of a fetal membrane that persist as strands of tissue crossing the pupil
Persistent_pupillary_membrane
Following the PSD/CDS/PPM coalition win in the 2024 regional election, in the October 2025 local elections, the PSD, CDS–PP and PPM lists, alone or in coalition
Next Azorean regional election
Next_Azorean_regional_election
Chemical compound
slight garlic or fish-like scent when the compound is present above 0.5 ppm. This compound is kinetically stable: at room temperature it decomposes only
Arsine
Chemical compound
highly flammable. The odor threshold of p-xylene is 0.62 parts per million (ppm). The production of p-xylene is industrially significant, with annual demand
P-Xylene
at 28 PPM. It has since started modestly rising to 36 PPM in 2014. The Bank of Canada's medium-term planning target is to stay below 30 PPM. Most G20
Banknotes of the Canadian dollar
Banknotes_of_the_Canadian_dollar
Subpermutation of a longer permutation
is #P-complete. However, PPM can be solved in linear time when k is a constant. Indeed, Guillemot and Marx showed that PPM can be solved in time 2 O
Permutation_pattern
Chemical compound
classified by ppm levels in ambient air with 4,000 ppm having a threshold effect. The intensity of symptoms varies from acute (1,000–8,000 ppm), including
Vinyl_chloride
American corporation
through three divisions: Hexagon Asset Lifecycle Intelligence (ALI, formerly PPM), Hexagon Safety & Infrastructure, and Hexagon Geospatial. The company's
Intergraph
Unit of water hardness
(CaCO3) per litre of water. Consequently, 1 dGH corresponds to 10 ppm CaO but 17.848 ppm CaCO3 which has a molar mass of 100.09 g/mol. Water portal Carbonate
DGH
Chemical compound (C6H14)
radical reactions. Inhalation of n-hexane at 5000 ppm for 10 minutes produces marked vertigo; 2500-1000 ppm for 12 hours produces drowsiness, fatigue, loss
Hexane
Chemical compound
mild, sweet, sharp odor, detectable by most people at a concentration of 50 ppm. Tetrachloroethylene is produced industrially by the chlorination or oxychlorination
Tetrachloroethylene
Measurement in environmental chemistry
(colloidal sol) suspended form. TDS are often measured in parts per million (ppm). TDS in water can be measured using a digital meter. Generally, the operational
Total_dissolved_solids
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
Heterocyclic aromatic organic compound
shows a triplet at δ(α-C) = 150 ppm, δ(β-C) = 124 ppm and δ(γ-C) = 136 ppm, whereas benzene has a single line at 129 ppm. All shifts are quoted for the
Pyridine
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
needed] of carbon dioxide in the atmosphere, represented in parts per million (ppm). Rather than taking a single observation at the surface, an integration
XCO2
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
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
Maldivian politician (born 1967)
elected as PPM presidential candidate". Minivan News. Retrieved 5 September 2025. Naahee, Mohamed (2 April 2013). "Umar Naseer alleges PPM primaries rigged
Umar_Naseer
Species of flowering plant
to 347,000 ppm protein, 94,000 to 475,000 ppm carbohydrates, 33,000 to 167,000 ppm fiber, 14,000 to 71,000 ppm fat, and 16,000 to 81,000 ppm ash. However
Sida_rhombifolia
President of the Maldives since 2023
vice-president and the head of the Elections Department of the then-opposition (PPM). On 5 October 2023, Muizzu was appointed as the president of People's National
Mohamed_Muizzu
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
Scottish energy company
the United Kingdom and generates power for supply to the grid. It owned PPM Energy in the United States, which has now been folded into Avangrid. ScottishPower
ScottishPower
PPM
PPM
PPM
PPM
Girl/Female
Gujarati, Indian, Kannada
To Get Something
Male
Slovene
Czech and Slovak and Slovene form of Greek Stephanos, �TEFAN means "crown."
Boy/Male
Muslim
Boy/Male
Hindu, Indian, Punjabi, Sikh, Traditional
One who Sings God's Praises
Girl/Female
Indian, Telugu
Knowledge 'Respect; Science
Boy/Male
American, Australian, British, English, French
Raven; Raven-haired
Girl/Female
Arabic, Muslim
Princess
Boy/Male
Hindu
Related
Boy/Male
Hindu, Indian
Light of the Teacher
Boy/Male
Tamil
Chaithanya | சைதநà¯à®¯à®¾
Life, Knowledge, Sage
PPM
PPM
PPM
PPM
PPM