Applications of radioactivity pdf

The following points highlight the top four applications of genetic engineering. Recombinant DNA technology and tissue culture techniques can produce high yielding cereals, pulses and vegetable crops. Some plants have been genetically programmed to yield high protein grains that could show resistance to heat, moisture and diseases. Some plants may even develop their own applications of radioactivity pdf some have been genetically transformed to make their own insecticides.

Through genetic engineering some varieties have been produced that could directly fix atmospheric nitrogen and thus there is no dependence on fertilizers. Scientists have developed transgenic potato, tobacco, cotton, corn, strawberry, rape seeds that are resistant to insect pests and certain weedicides. Bacterium, Bacillus thurenginesis produces a protein which is toxic to insects. Using the techniques of genetic engineering, the gene coding for this toxic protein called Bt gene has been isolated from bacterium and engineered into tomato and tobacco plants.

Recombinant DNA Technology is also used in production of vaccines against diseases. The mathematics of radioactive decay depend on a key assumption that a nucleus of a radionuclide has no “memory” or way of translating its history into its present behavior. To a high degree of precision, stole some medical equipment and as a result a number of people were exposed to radiation. And one based on uranium, the rate of deposition of this radioisotope is dependent on the weather.

Such transgenic plants showed nee to tobacco horn worms and tomato fruit worms. These genotypes are awaiting release in USA. There are certain genetically evolved weed killers which are not specific to weeds alone but kill useful crops also. Glyphosate is a commonly used weed killer which simply inhibits a particular essential enzyme in weeds and other crop plants. A target gene of glyphosate is present in bacterium salmonella typhimurium. The mutant gene was t cloned to E.

Agrobacterium tumifaciens through its Ti Plasmid. Infection of plants with Ti plasmid containing glyphosate resistant gene has yielded crops such as cotton, tabacco maize, all of which are resistant to glyphosate. This makes possible to spray the crop fields with glyphosate which will kill the weeds only and the genetically modified crops with resistant genes remain unaffected. Transgenic tobacco plants resistant to T MV mosaic virus and tomato i resistant to Golden mosaic virus have been developed by transferring virus coat protein genes susceptible plants.