[Agren & Andersson 2012] Accumulation of litter and particular decomposed plant parts on top of the mineral soil. Often sub-divided into litter (S, L and F) and humus (H) horizons. This horizon consists mostly of organic matter. In forest soils, this horizon is often called forest floor
[GEMET] A gaseous chemical element; an essential element in cellular respiration and in combustion processes; the most abundant element in the earth's crust and about 20% of the air by volume.
[GEMET] A gaseous chemical element; an essential element in cellular respiration and in combustion processes; the most abundant element in the earth's crust and about 20% of the air by volume.
Number concentration means number of molecule per unit volume, and is used in the construction molecular_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chemical formula for o-tolualdehyde is C8H8O. O-tolualdehyde is a member of the group of aldehydes. The IUPAC name for o-tolualdehyde is 2-methylbenzaldehyde.
Mass concentration means mass per unit volume and is used in the construction mass_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chemical formula for o-cresol is C7H8O. O-cresol is a member of the group of alcohols. The IUPAC name for o-cresol is 2-methylphenol.
Number concentration means number of molecule per unit volume, and is used in the construction molecular_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chemical formula for o-cresol is C7H8O. O-cresol is a member of the group of alcohols. The IUPAC name for o-cresol is 2-methylphenol.
Mass concentration means mass per unit volume and is used in the construction mass_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chemical formula for o-xylene is C8H10. O-xylene is a member of the group of hydrocarbons known as aromatics. The IUPAC name for o-xylene is 1,2-xylene.
Number concentration means number of molecule per unit volume, and is used in the construction molecular_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chemical formula for o-xylene is C8H10. O-xylene is a member of the group of hydrocarbons known as aromatics. The IUPAC name for o-xylene is 1,2-xylene.
Mass concentration means mass per unit volume and is used in the construction mass_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chemical formula for o-tolualdehyde is C8H8O. O-tolualdehyde is a member of the group of aldehydes. The IUPAC name for o-tolualdehyde is 2-methylbenzaldehyde.
Amount fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The chemical formula for o-cresol is C7H8O. O-cresol is a member of the group of alcohols. The IUPAC name for o-cresol is 2-methylphenol.
Amount fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The chemical formula for o-tolualdehyde is C8H8O. O-tolualdehyde is a member of the group of aldehydes. The IUPAC name for o-tolualdehyde is 2-methylbenzaldehyde.
Amount fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The chemical formula for o-xylene is C8H10. O-xylene is a member of the group of hydrocarbons known as aromatics. The IUPAC name for 1,2-xylene.
Number concentration means number of molecule per unit volume, and is used in the construction molecular_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chmical formula for tetrabromo-o-chlorotoluene is C7H3Br4Cl. It is a member of the group of halogenated organics and aromatics. The IUPAC name is 1,2,3,4-tetrabromo-5-chloro-6-methylbenzene
Mass concentration means mass per unit volume and is used in the construction mass_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chmical formula for o,p-DDE is C14H8Cl4. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2-dichloro-1-(4-chlorophenyl)ethenyl]benzene
Number concentration means number of molecule per unit volume, and is used in the construction molecular_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chmical formula for o,p-DDD is C14H10Cl4. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2-dichloro-1-(4-chlorophenyl)ethyl]benzene
Number concentration means number of molecule per unit volume, and is used in the construction molecular_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chmical formula for o,p-DDT is C14H9Cl5. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2,2-trichloro-1-(4-chlorophenyl)ethyl]benzene
Number concentration means number of molecule per unit volume, and is used in the construction molecular_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chmical formula for o,p-DDE is C14H8Cl4. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2-dichloro-1-(4-chlorophenyl)ethenyl]benzene
Mass concentration means mass per unit volume and is used in the construction mass_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chmical formula for o,p-DDT is C14H9Cl5. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2,2-trichloro-1-(4-chlorophenyl)ethyl]benzene
Amount fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The chmical formula for o,p-DDT is C14H9Cl5. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2,2-trichloro-1-(4-chlorophenyl)ethyl]benzene
Mass concentration means mass per unit volume and is used in the construction mass_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chmical formula for o,p-DDD is C14H10Cl4. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2-dichloro-1-(4-chlorophenyl)ethyl]benzene
Amount fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The chmical formula for o,p-DDE is C14H8Cl4. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2-dichloro-1-(4-chlorophenyl)ethenyl]benzene
Mass concentration means mass per unit volume and is used in the construction mass_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. The chmical formula for tetrabromo-o-chlorotoluene is C7H3Br4Cl. It is a member of the group of halogenated organics and aromatics. The IUPAC name is 1,2,3,4-tetrabromo-5-chloro-6-methylbenzene
Amount fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The chmical formula for o,p-DDD is C14H10Cl4. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2-dichloro-1-(4-chlorophenyl)ethyl]benzene
Amount fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The chmical formula for tetrabromo-o-chlorotoluene is C7H3Br4Cl. It is a member of the group of halogenated organics and aromatics. The IUPAC name is 1,2,3,4-tetrabromo-5-chloro-6-methylbenzene
Mass concentration means mass per unit volume and is used in the construction mass_ concentration_ of_ X_ in_ Y, where X is a material constituent of Y. Precipitation is liquid or frozen water that forms in the atmosphere and falls to the earth. It comes in many forms, like rain, snow, and sleet. The chmical formula for o,p-DDE is C14H8Cl4. It belongs to the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2-dichloro-1-(4-chlorophenyl)ethenyl]benzene
Mass concentration means mass per unit volume and is used in the construction mass_ concentration_ of_ X_ in_ Y, where X is a material constituent of Y. Precipitation is liquid or frozen water that forms in the atmosphere and falls to the earth. It comes in many forms, like rain, snow, and sleet. The chmical formula for o,p-DDT is C14H9Cl5. It belongs to the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2,2-trichloro-1-(4-chlorophenyl)ethyl]benzene
Mass concentration means mass per unit volume and is used in the construction mass_ concentration_ of_ X_ in_ Y, where X is a material constituent of Y. Precipitation is liquid or frozen water that forms in the atmosphere and falls to the earth. It comes in many forms, like rain, snow, and sleet. The chmical formula for o,p-DDD is C14H10Cl4. It belongs to the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2-dichloro-1-(4-chlorophenyl)ethyl]benzene
Mass concentration means mass per unit volume and is used in the construction mass_ concentration_ of_ X_ in_ Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_ expressed_ as_ nitrogen". "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. Aerosol particles take up ambient water (a process known as hygroscopic growth) depending on the relative humidity and the composition of the particles. The chmical formula for tetrabromo-o-chlorotoluene is C7H3Br4Cl. It belongs to the group of halogenated organics and aromatics. The IUPAC name is 1,2,3,4-tetrabromo-5-chloro-6-methylbenzene
Mass concentration means mass per unit volume and is used in the construction mass_ concentration_ of_ X_ in_ Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_ expressed_ as_ nitrogen". "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. Aerosol particles take up ambient water (a process known as hygroscopic growth) depending on the relative humidity and the composition of the particles. The chmical formula for o,p-DDD is C14H10Cl4. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2-dichloro-1-(4-chlorophenyl)ethyl]benzene
Mass concentration means mass per unit volume and is used in the construction mass_ concentration_ of_ X_ in_ Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_ expressed_ as_ nitrogen". "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. Aerosol particles take up ambient water (a process known as hygroscopic growth) depending on the relative humidity and the composition of the particles. The chmical formula for o,p-DDE is C14H8Cl4. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2-dichloro-1-(4-chlorophenyl)ethenyl]benzen
Mass concentration means mass per unit volume and is used in the construction mass_ concentration_ of_ X_ in_ Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_ expressed_ as_ nitrogen". "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. Aerosol particles take up ambient water (a process known as hygroscopic growth) depending on the relative humidity and the composition of the particles. The chmical formula for o,p-DDT is is C14H9Cl5. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2,2-trichloro-1-(4-chlorophenyl)ethyl]benzene
Mass concentration means mass per unit volume and is used in the construction mass_ concentration_ of_ X_ in_ Y, where X is a material constituent of Y. "Gas and particle" means a system consisting of both gas and suspended liquid or solid particles in air (except cloud droplets). The chmical formula for o,p-DDT is is C14H9Cl5. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2,2-trichloro-1-(4-chlorophenyl)ethyl]benzene
Mass concentration means mass per unit volume and is used in the construction mass_ concentration_ of_ X_ in_ Y, where X is a material constituent of Y. "Gas and particle" means a system consisting of both gas and suspended liquid or solid particles in air (except cloud droplets). The chmical formula for tetrabromo-o-chlorotoluene is C7H3Br4Cl. It belongs to the group of halogenated organics and aromatics. The IUPAC name is 2-chloronaphthalene
Mass concentration means mass per unit volume and is used in the construction mass_ concentration_ of_ X_ in_ Y, where X is a material constituent of Y. "Gas and particle" means a system consisting of both gas and suspended liquid or solid particles in air (except cloud droplets). The chmical formula for o,p-DDD is C14H10Cl4. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2-dichloro-1-(4-chlorophenyl)ethyl]benzene
Mass concentration means mass per unit volume and is used in the construction mass_ concentration_ of_ X_ in_ Y, where X is a material constituent of Y. "Gas and particle" means a system consisting of both gas and suspended liquid or solid particles in air (except cloud droplets). The chmical formula for o,p-DDE is C14H8Cl4. It is a member of the group of persistent organic pollutants (POPs). The IUPAC name is 1-chloro-2-[2,2-dichloro-1-(4-chlorophenyl)ethenyl]benzen
A bench-top elemental analyser that is capable of operating in three modes: CHN, CHNS and Oxygen, is fully automated, and includes a 60 position autosampler. CHN and CHNS are determined via the classical Pregl-Dumas method where samples are combusted in a pureoxygen environment. Oxygen determination is based on the classical Unterzuacher method which incorporates the modifications of Oita, Conway and Culmo where samples are converted to carbon monoxide following after pryolisation and reaction with a platinised carbon reagent. The analyser has an accuracy of <=0.3% and a precision of <=02%. The analytical range is from 0.001 -3.6 mgs for C, 0.001-1.0 for H, 0.001-6 mgs for N and 0.001 to 2.0 mgs for S and O.
A bench-top elemental analyser that is capable of operating in three modes: CHN, CHNS and Oxygen, is fully automated, and includes a 60 position autosampler. CHN and CHNS are determined via the classical Pregl-Dumas method where samples are combusted in a pureoxygen environment. Oxygen determination is based on the classical Unterzuacher method which incorporates the modifications of Oita, Conway and Culmo where samples are converted to carbon monoxide following after pryolisation and reaction with a platinised carbon reagent. The analyser has an accuracy of <=0.3% and a precision of <=02%. The analytical range is from 0.001 -3.6 mgs for C, 0.001-1.0 for H, 0.001-6 mgs for N and 0.001 to 2.0 mgs for S and O.
[Wikipedia] Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. After hydrogen and helium, oxygen is the third-most abundant element in the universe by mass. At standard temperature and pressure, two atoms of the element bind to form dioxygen, a colorless and odorless diatomic gas with the formula O. Diatomic oxygen gas currently constitutes 20.95% of the Earth's atmosphere, though this has changed considerably over long periods of time. Oxygen makes up almost half of the Earth's crust in the form of oxides.