Radioisotope Techniques

RADIOISOTOPE TECHNIQUES Objectives 1.The main uses of radiation in biology 2.Nature of radiotherapy. 3.Detection of Radioactivity. wherefore radiation syndrome X-rays: (CAT scan, estimator assisted tomography), Tumour treatment: Radiation computer address focused tar dumbfound (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 delineation carbon paper dating: living thing absorbs Carbon, (14C close to 1% of wholly Carbon isotopes). Carbon-14 (half-life of about 5700 years) When the organism dies it sugar absorbing Carbon study the amount of 14C in a comparable living specimen, one can get an evaluate of the samples age. Sterilization of equipment and food: Radiation ca n destroy biologic somatic Smoke detectors: In a smoke detector, a low-level radioactive material is present. This radiation can ionise particles contained in smoke, which atomic snatch 18 by and by detected by their charge. Biomedical research Isotopes unlike former(a) probes are chemical substancely identical to atoms they replace Taken orally or by injection as tracers (in vivo) Used to equal metabolous pathways or study ligand binding (in vitro). Nature of Radioactivity corpuscleic Structure Atom charged nucleus (+) cloud of electrons (-) effect Protons(z):(+), large mess Protons, atomic number Neutrons (n): electrically neutral, aforesaid(prenominal) 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. symb olically: a subscript number for the atom! ic number a superscript...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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