(isim) metan

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methane
The principal constituent of natural gas
A hydrocarbon that is a greenhouse gas with a global warming potential most recently estimated at 24 5 Methane is produced through anaerobic (without oxygen) decomposition of waste in landfills, animal digestion, decomposition of animal wastes, production and distribution of natural gas and oil, coal production , and incomplete fossil fuel combustion The atmospheric concentration of methane has been shown to be increasing at a rate of about 0 6% per year and the concentration of about 1 7 parts per million by volume (ppmv) is more than twice its preindustrial value However, the rate of increase of methane in the atmosphere may be stabilizing
An odorless, colorless, flammable gas with the formula CH4 that is the primary constituent of natural gas
A colorless, odorless gas composed of carbon and hydrogen Methane occurs naturally in marshes, rice paddies, oil wells, and volcanoes Methane is also formed in the digestive track of cattle and termites Methane is a greenhouse gas in the atmosphere because it absorbs long-wavelength radiation from the Earth's surface
The most simple of the hydrocarbons formed naturally from the decay of vegetative matter, similar to that which formed coal It is the principal component of natural gas and is a radiative gas
- A gaseous carbon compound produced primarily by decomposition of organic compounds under anaerobic (no oxygen) conditions It is an important greenhouse gas, with a global warming potential roughly 21 times that of carbon dioxide It is produced primarily in the gut of ruminant animals and in the anaerobic conditions created by saturated soils (wetlands), sealed landfills, or covered manure lagoons Healthy forests, in the absence of supplemental fertilization, have been shown to be an important methane sink, removing methane from the air through the action of soil organisms The scientific basis for quantifying these methane effects is poorly known at this time, however, and NCOC forestry projects will not, at this time, consider forest effects on methane sources and sinks in project accounting
See Marsh gas, under Gas
A highly flammable gas that is the main constituent of "natural gas" Methane is used as a fuel and in manufacturing chemicals
also called marsh gas, is composed of one carbon molecule and four hydrogen molecules (CH4) It is lighter than air, colourless, odourless and flammable Methane is produced wherever once-living materials decay It is released from swamps, rice paddies, garbage in landfills, and burning forests It is also produced by animals like cows during the digestive process Since methane has 25 times the heat trapping capability of carbon dioxide, and since methane production is directly related to population growth, methane is a serious contributor to the greenhouse effect [Jenson] However, it helps other chemicals to be released from coal mining, the production of petroleum products, and the use of natural gas
a colorless odorless gas used as a fuel
hydrocarbon gas composed of carbon and hydrogen with a formula of CH4 It is lighter than air, colorless, odorless and flammable It occurs in natural gas and as firedamp in coal mines With the correct amount of oxygen present, methane ignites at 595°C (1103°F)
- the main component of natural gas It also occurs in coal beds and is produced by animals and by the decay of vegetable matter This is the smallest hydrocarbon molecule, with only one carbon atom and four hydrogen atoms
A colorless, nonpoisonous, flammable gas created by anaerobic decomposition of organic compounds A major component of natural gas used in the home
A hydrocarbon with four Hydrogen atoms attached to each Carbon atom (CH4) Methane is called "swamp gas" because it is produced by bacteria when organic matter decomposes under anoxic (oxygen-free) conditions, as in swampy land Methane-producing bacteria are sensitive to oxygen, but they exist in habits such as animal digestive tracts, sanitary landfills, swamps, sludge, and other decaying organic matter, where the oxygen has already been removed by other bacteria Methane can be used as a fuel, and as a gas is significant as a contributor to the greenhouse effect _ the only major greenhouse gas produced in greater amounts by developing countries than industrialized countries (Source: Mintzer, 1992)
– A potentially explosive gas formed naturally from the decay of vegetative matter, similar to that which formed coal Methane, which is the principal component of natural gas, is frequently encountered in underground coal mining operations and is kept within safe limits through the use of extensive mine ventilation systems
(CH4) - the smallest hydrocarbon molecule with one carbon atom and four hydrogen atoms It is the chief constituent of natural gas, but also occurs in coal beds, and is produced by animals and the decay of vegetable material It is a light colourless, odourless flammable gas under normal conditions Methane is the first member in the alkane (paraffin) series At atmospheric pressure, it liquefies at -162°C
Any of very many derivatives of methane
The simplest aliphatic hydrocarbon, CH{4}, being a constituent of natural gas
a greenhouse gas whose importance has increased significantly in greenhouse warming scenarios as concentrations continue to rise Methane is about 20 times more effective as a greenhouse gas than carbon dioxide, making it an important species in the global warming estimates It is currently increasing at a rate of ~1% per year with concentrations of approximately 1 75 ppb Major natural methane sources are known to include fermentation in ruminant animals, anaerobic decay of organic material in rice paddies, natural wetlands Significant anthropogenic sources include landfills; inadvertent release of trapped and adsorbed gas during coal mining, natural gas production and distribution, and oil exploration; incomplete combustion during biomass burning Due to its relatively long chemical lifetime, methane can also be transported into the stratosphere where it can contribute to ozone loss
{i} swamp gas; gas obtained from the natural decomposition of organic matter (Chemistry)
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