Radioisotope Techniques

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

Biomedical research Isotopes unlike other probes are chemical substancely identical to atoms they replace Taken by word of mouth or by injection as tracers (in vivo) Used to dramatize metabolous pathways or study ligand binding (in vitro). Nature of Radioactivity corpuscleic Structure Atom charged nucleus (+) cloud of electrons (-) centre Protons(z):(+), ! large mess Protons, atomic number Neutrons (n): electrically neutral, resembling 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 deficient 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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