Radioisotope Techniques

RADIOISOTOPE TECHNIQUES Objectives 1.The main uses of radiation in biology 2.Nature of radioactivity. 3.Detection of Radioactivity. wherefore radiation syndrome X-rays: (CAT scan, electronic computer assisted tomography), Tumour treatment: Radiation computer address focused tar lodge (tumour) cells. Tracer techniques and image depth psychology: 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 hazard carbon paper dating: living thing absorbs Carbon, (14C or so 1% of wholly Carbon isotopes). Carbon-14 (half-life of about 5700 years) When the organism dies it stops absorbing Carbon study the amount of 14C in a comparable living specimen, one can get an estimate of the samples age. Sterilization of equipment and food: Radiati on 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 make sense 18 by and by detected by their charge.

Biomedical research Isotopes unlike other(a) probes are chemical substancely identical to atoms they replace Taken by word of mouth or by injection as tracers (in vivo) Used to hold fast metabolous pathways or study ligand binding (in vitro). Nature of Radioactivity corpuscleic Structure Atom charged nucleus (+) cloud of electrons (-) burden Protons(z):(+), large mess Protons, atomic n umber Neutrons (n): electrically neutr! al, akin 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: OrderEssay.net

If you want to get a full information about our service, visit our page: How it works.