Military use infrared systems
for night operation. Infra red systems used in military are provided with
additional infra red illuminators. The advantages of these systems are low
background contrast and limited range. In these systems, very fast and highly
sensitive infra red detectors and electro-optical scanners are used. Display of
infra red systems is very much similar to TV display. Two popular military infra
red systems are infra red line scanner system and forward looking infra red
system. Infra red line scanner system is used for the production of imagery of
the terrain over flown. Here scanning of ground is carried out in narrow strips
at right angles to the line of flight of the motion of aircraft followed by
recording on a film. Forward looking infra red systems are often used with
radar and can perform multi sensor operations. Some other infra red systems
used in military are cyclone airbone infra red reconnaissance system, TA-7M2
aerial camera, FFV UNI reconnaissance pod, vinten airbone camera, Minisan
camera, pave spike video film recorders, return beam vidicon camera, laser beam
image reproducer and laser radar recorder.
Strong India
Monday, June 4, 2012
Tuesday, May 22, 2012
Photorespiration
Plants undergo respiratory
processes like animals and microorganisms. Plants can degrade carbohydrates by
means of glycolysis and the Krebs cycle. Plants are also capable of catalyzing
the general reactions of protein and amino acid metabolism. The organelles
which support these reactions in plant cell are microsomes, mitochondria and
cytoplasm. On illumination, plants undergo an additional metabolic activity. This is known as photorespiration. This
process is opposite to photosynthesis and decreases plant growth and crop
yield. Photorespiration arises in plants when rubisco catalyzes the oxygenation
of ribulose-1,5-biphosphate. Photorespiration produces adverse effects in crops
like wheet, rice, legumes and sugar. Therefore for better yields,
photorespiration has to be stopped. Researchers are struggling hard to develop
methods to stop photorespiration and to enhance photosynthesis.
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