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#Post#: 317--------------------------------------------------
Tugasan 5 AK - Nirogen cycle
By: riskzal Date: February 9, 2011, 9:42 pm
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Sila submit tugasan berkumpulan tajuk Nitrogen cycle di sini.
Harap maklum
#Post#: 318--------------------------------------------------
Re: Tugasan 5 AK - Nirogen cycle
By: Amar 4ak Date: February 9, 2011, 9:53 pm
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AMAR&WAN&MEGAT&FAREZ
HTML http://www.iteachbio.com/Life%20Science/Ecology/NitrogenCycle.jpg
The nitrogen cycle is the process by which nitrogen is converted
between its various chemical forms. This transformation can be
carried out via both biological and non-biological processes.
Important processes in the nitrogen cycle include fixation,
mineralization, nitrification, and denitrification. The majority
of Earth's atmosphere (approximately 78%) is nitrogen,[1] making
it the largest pool of nitrogen. However, atmospheric nitrogen
is unavailable for biological use, leading to a scarcity of
usable nitrogen in many types of ecosystems. The nitrogen cycle
is of particular interest to ecologists because nitrogen
availability can affect the rate of key ecosystem processes,
including primary production and decomposition. Human activities
such as fossil fuel combustion, use of artificial nitrogen
fertilizers, and release of nitrogen in wastewater have
dramatically altered the global nitrogen cycle.
#Post#: 319--------------------------------------------------
Re: Tugasan 5 AK - Nirogen cycle
By: haziq 4ak Date: February 9, 2011, 9:55 pm
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[move]haziq , pidot[/move]
Nitrogen cycle
The nitrogen cycle is the process by which nitrogen is converted
between its various chemical forms. This transformation can be
carried out via both biological and non-biological processes.
Important processes in the nitrogen cycle include fixation,
mineralization, nitrification, and denitrification. The majority
of Earth's atmosphere (approximately 78%) is nitrogen,[1] making
it the largest pool of nitrogen. However, atmospheric nitrogen
is unavailable for biological use, leading to a scarcity of
usable nitrogen in many types of ecosystems. The nitrogen cycle
is of particular interest to ecologists because nitrogen
availability can affect the rate of key ecosystem processes,
including primary production and decomposition. Human activities
such as fossil fuel combustion, use of artificial nitrogen
fertilizers, and release of nitrogen in wastewater have
dramatically altered the global nitrogen cycle.
What is nitrogen used for?
Nitrogen is a component of many organic molecules. It forms
an essential part of amino acids (which make up proteins) and
DNA. Nitrogen is essential for all living cells.
What is the nitrogen cycle?
Nitrogen is the major component of earth's atmosphere. It
enters the food chain by means of nitrogen-fixing bacteria and
algae in the soil. This nitrogen which has been 'fixed' is now
available for plants to absorb. These types of bacteria form a
symbiotic relationship with legumes--these types of plants are
very useful because the nitrogen fixation enriches the soil and
acts as a 'natural' fertilizer. The nitrogen-fixing bacteria
form nitrates out of the atmospheric nitrogen which can be taken
up and dissolved in soil water by the roots of plants. Then,
the nitrates are incorporated by the plants to form proteins,
which can then be spread through the food chain. When organisms
excrete wastes, nitrogen is released into the environment.
Also, whenever an organism dies, decomposers break down the
corpse into nitrogen in the form of ammonia. This nitrogen can
then be used again by nitrifying bacteria to fix nitrogen for
the plants.
HTML http://upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Nitrogen_Cycle.svg/320px-Nitrogen_Cycle.svg.png
HTML http://2.bp.blogspot.com/_Iq3rNTB2Qjw/TOz5kGHguEI/AAAAAAAAAHg/L7XFnZXWfQc/s400/nitrogencycle.jpg
#Post#: 320--------------------------------------------------
Re: Tugasan 5 AK - Nirogen cycle
By: to0thy Date: February 9, 2011, 9:56 pm
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[move]AMIRUL & ILYAS [/move]
Kitaran nitrogen adalah proses dimana nitrogen diubah antara
pelbagai bentuk kimia. Transformasi ini dapat dilakukan baik
melalui proses biologi dan non-biologi. Proses penting dalam
kitaran nitrogen meliputi fiksasi, mineralisasi, nitrifikasi,
dan denitrifikasi. Sebahagian besar atmosfera bumi (sekitar 78%)
merupakan nitrogen, [1] sehingga kolam terbesar nitrogen. Namun,
nitrogen atmosfera tidak tersedia untuk penggunaan biologi,
mengarah ke kelangkaan nitrogen boleh digunakan dalam pelbagai
jenis ekosistem. Kitaran nitrogen menjadi minat khusus untuk
ekologi kerana ketersediaan nitrogen boleh mempengaruhi laju
proses ekosistem kunci, termasuk pengeluaran primer dan
dekomposisi. Kegiatan manusia seperti pembakaran bahan bakar
fosil, penggunaan baja nitrogen buatan, dan pelepasan nitrogen
dalam air sisa telah secara dramatik mengubah kitaran nitrogen
global.
GAMBAR :
HTML http://en.wikipedia.org/wiki/File:Nitrogen_Cycle.svg
#Post#: 321--------------------------------------------------
Re: Tugasan 5 AK - Nirogen cycle
By: wan nabil 4ak Date: February 9, 2011, 9:57 pm
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nabil cute ;)
afiq macho 8)
nitrogen cycle
The nitrogen cycle is the process by which nitrogen is converted
between its various chemical forms. This transformation can be
carried out via both biological and non-biological processes.
Important processes in the nitrogen cycle include fixation,
mineralization, nitrification, and denitrification. The majority
of Earth's atmosphere (approximately 78%) is nitrogen,[1] making
it the largest pool of nitrogen. However, atmospheric nitrogen
is unavailable for biological use, leading to a scarcity of
usable nitrogen in many types of ecosystems. The nitrogen cycle
is of particular interest to ecologists because nitrogen
availability can affect the rate of key ecosystem processes,
including primary production and decomposition. Human activities
such as fossil fuel combustion, use of artificial nitrogen
fertilizers, and release of nitrogen in wastewater have
dramatically altered the global nitrogen cycle.
HTML http://en.wikipedia.org/wiki/File:Nitrogen_Cycle.svg
#Post#: 322--------------------------------------------------
Re: Tugasan 5 AK - Nirogen cycle
By: syedtough Date: February 9, 2011, 9:57 pm
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[move]Syed 8) and Imran ::)[/move]
The nitrogen cycle is the process by which nitrogen is
converted between its various chemical forms. This
transformation can be carried out via both biological and
non-biological processes. Important processes in the nitrogen
cycle include fixation, mineralization, nitrification, and
denitrification. The majority of Earth's atmosphere
(approximately 78%) is nitrogen,[1] making it the largest pool
of nitrogen. However, atmospheric nitrogen is unavailable for
biological use, leading to a scarcity of usable nitrogen in many
types of ecosystems. The nitrogen cycle is of particular
interest to ecologists because nitrogen availability can affect
the rate of key ecosystem processes, including primary
production and decomposition. Human activities such as fossil
fuel combustion, use of artificial nitrogen fertilizers, and
release of nitrogen in wastewater have dramatically altered the
global nitrogen cycle. ;D ;D
HTML http://en.wikipedia.org/wiki/File:Nitrogen_Cycle.svg
#Post#: 324--------------------------------------------------
Re: Tugasan 5 AK - Nirogen cycle
By: Hamizan 4AK Date: February 9, 2011, 10:02 pm
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[move]HAMIZAN N HAFIZ[/move]
The nitrogen cycle is the process by which nitrogen is converted
between its various chemical forms. This transformation can be
carried out via both biological and non-biological processes.
Important processes in the nitrogen cycle include fixation,
mineralization, nitrification, and denitrification. The majority
of Earth's atmosphere (approximately 78%) is nitrogen,[1] making
it the largest pool of nitrogen. However, atmospheric nitrogen
is unavailable for biological use, leading to a scarcity of
usable nitrogen in many types of ecosystems. The nitrogen cycle
is of particular interest to ecologists because nitrogen
availability can affect the rate of key ecosystem processes,
including primary production and decomposition. Human activities
such as fossil fuel combustion, use of artificial nitrogen
fertilizers, and release of nitrogen in wastewater have
dramatically altered the global nitrogen cycle.
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