Environmental Biodegradation Research Focus
by: B. y. Wang
Environmental Biodegradation Research Focus
By B. y. Wang
(January 2008)
Publisher: Nova Science Publishers
Number Of Pages: 320
ISBN-10 / ASIN: 1600219047
ISBN-13 / EAN: 9781600219047
Product Description:
This new book is devoted to leading-edge research on environmental
biodegradation which is the destruction of organic compounds by
microorganisms. Microorganisms, particularly bacteria, are responsible
for the decomposition of both natural and synthetic organic compounds
in nature.Mineralisation results in complete conversion of a compound
to its inorganic mineral constituents (for example, carbon dioxide from
carbon, sulphate or sulphide from organic sulphur, nitrate or ammonium
from organic nitrogen, phosphate from organophosphates, or chloride
from organochlorine). Since carbon comprises the greatest mass of
organic compounds, mineralisation can be considered in terms of CO2
evolution. Radioactive carbon-14 (14C) isotopes enable scientists to
distinguish between mineralisation arising from contaminants and soil
organic matter. However, mineralization of any compound is never 100
per cent because some of it (10-40 per cent of the total amount
degraded) is incorporated into the cell mass or products that become
part of the amorphous soil organic matter, commonly referred to as
humus.Thus, biodegradation comprises mineralisation and conversion to
innocuous products, namely biomass and humus. Primary biodegradation is
more limited in scope and refers to the disappearance of the compound
as a result of its biotransformation to another product. Compounds that
are readily biodegradable are generally utilised as growth substrates
by single microorganisms. Many of the components of petroleum products
(and frequent ground-water contaminants), such as benzene, toluene,
ethylbenzene, and xylene, are utilised by many genera of bacteria as
sole carbon sources for growth and energy.
http://depositfiles.com/en/files/gz8ohe1n9
by: B. y. Wang
Environmental Biodegradation Research Focus
By B. y. Wang
(January 2008)
Publisher: Nova Science Publishers
Number Of Pages: 320
ISBN-10 / ASIN: 1600219047
ISBN-13 / EAN: 9781600219047
Product Description:
This new book is devoted to leading-edge research on environmental
biodegradation which is the destruction of organic compounds by
microorganisms. Microorganisms, particularly bacteria, are responsible
for the decomposition of both natural and synthetic organic compounds
in nature.Mineralisation results in complete conversion of a compound
to its inorganic mineral constituents (for example, carbon dioxide from
carbon, sulphate or sulphide from organic sulphur, nitrate or ammonium
from organic nitrogen, phosphate from organophosphates, or chloride
from organochlorine). Since carbon comprises the greatest mass of
organic compounds, mineralisation can be considered in terms of CO2
evolution. Radioactive carbon-14 (14C) isotopes enable scientists to
distinguish between mineralisation arising from contaminants and soil
organic matter. However, mineralization of any compound is never 100
per cent because some of it (10-40 per cent of the total amount
degraded) is incorporated into the cell mass or products that become
part of the amorphous soil organic matter, commonly referred to as
humus.Thus, biodegradation comprises mineralisation and conversion to
innocuous products, namely biomass and humus. Primary biodegradation is
more limited in scope and refers to the disappearance of the compound
as a result of its biotransformation to another product. Compounds that
are readily biodegradable are generally utilised as growth substrates
by single microorganisms. Many of the components of petroleum products
(and frequent ground-water contaminants), such as benzene, toluene,
ethylbenzene, and xylene, are utilised by many genera of bacteria as
sole carbon sources for growth and energy.
http://depositfiles.com/en/files/gz8ohe1n9
