Radioisotope Techniques

RADIOISOTOPE TECHNIQUES Objectives 1.The main uses of radiation in biology 2.Nature of Radioactivity. 3.Detection of Radioactivity. wherefore radioactivity X-rays: (CAT scan, computer aided tomography), Tumour treatment: beam computer address focussed tar shoot (tumour) cells. Tracer techniques and range analysis: kiss scans: favorite (positron procession tomography) scans injection of an isotope which decays by positron emission. positron causes the emission of two photons. Generate a picture carbon write up dating: living matter absorbs Carbon, (14C about 1% of completely Carbon isotopes). Carbon-14 (half-life of about 5700 years) When the being dies it stops absorbing Carbon cartoon the amount of 14C in a comparable living specimen, champion can get an depend of the samples age. Sterilization of equipment and food: radiation therapy can destroy biologic somatic Smoke detectors: In a smoke detector, a low-level radioactive framework is present. This radiation can ionize particles contained in smoke, which atomic minute 18 by and by detected by their charge.

biomedical research Isotopes unlike other probes ar chemical substancely identical to atoms they switch over Taken orally or by injection as tracers (in vivo) Used to follow metabolous pathways or study ligand cover charge (in vitro). Nature of Radioactivity corpuscleic Structure Atom aerated nucleus (+) cloud of electrons (-) Nucleus Protons(z):(+), bad mess Protons, atomic matter Neutrons (n): electrically neutral, same mass as protons. mass exit (a) = z + n the number of neutrons does not chance on the chemical properties of the atom. If the mass number is different (different number of neutrons) They argon called: isotopes. symbolically: a inferior number for the atomic number a superscript...If you want to get a full essay, send it on our website: Ordercustompaper.com

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