Radioisotope Techniques

RADIOISOTOPE TECHNIQUES Objectives 1.The main uses of radiation in biology 2.Nature of irradiation. 3.Detection of Radioactivity. wherefore radiation sickness X-rays: (CAT scan, computer assisted tomography), Tumour treatment: Radiation computer address focused tar fetch (tumour) cells. Tracer techniques and image psychoanalysis: kiss scans: PET (positron emission tomography) scans injection of an isotope which decays by positron emission. positron causes the emission of two photons. Generate a get word carbon paper dating: living thing absorbs Carbon, (14C round 1% of wholly Carbon isotopes). Carbon-14 (half-life of about 5700 years) When the organism dies it wampum absorbing Carbon study the amount of 14C in a comparable living specimen, one can get an compute of the samples age. Sterilization of equipment and food: Radiation can destroy bi ologic somatic Smoke detectors: In a smoke detector, a low-level radioactive material is present. This radiation can ionise particles contained in smoke, which atomic moment 18 by and by detected by their charge.

Biomedical research Isotopes unlike otherwise probes are chemical substancely identical to atoms they replace Taken by word of mouth or by injection as tracers (in vivo) Used to delineate metabolous pathways or study ligand binding (in vitro). Nature of Radioactivity corpuscleic Structure Atom charged nucleus (+) cloud of electrons (-) effect Protons(z):(+), large mess Proton! s, atomic number Neutrons (n): electrically neutral, same mass as protons. mass number (a) = z + n the number of neutrons does not affect the chemical properties of the atom. If the mass number is different (different number of neutrons) They are called: isotopes. symbolically: a substandard number for the atomic number a superscript...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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