Lab 8 past Qs Flashcards
List the 3 possible interactions btw gamma radiation and matter
Photoelectric effect, Compton Scattering and Pair production
What is Compton Scattering?(
γ-photon colliding with free or loosly bound electron in the absorber
Which radiation type has the highest ionizing ability?(
alpha
Where is progesterone produced?(
ovary, and small amounts in adrenal medulla)
What is detected in pregnancy in humans?(
presens of hCG secretion by trophoblast cells in placenta)
What is pair production?(
may happend when high energy photon come near atomic nucleus of the absorber
Give step of ELISA?
(enzyme linked to antigen or antibody, after immunological reaction and separation a chromogenic substrate of the given enzyme is added. If complex exist, colour reaction)
What is the shortest effective distance?
alpha
What is the strongest pervasive radiation?
gamma
Which ions inhibit iodine accumulation?
(thiocyanate ions)
Particles in Beta-radiation
(electron and positron)
Which radiation has longest effective distance?(
gamma
Which radiation has strongest effective pervasivness?(
gamma
name the isotopes of hydrogen.(
protium, deuterium and tritium
What is background count?(
cosmic radiation and internal electronic noise of the apparatus
How to detect progesterone in blood? (
ELISA + RIA)
Which animals can estrone sulphate be detected in the blood by ELISA or RIA?
(Swine and Horse
Most common Hydrogen isotope?(
protium
What does alfa particles consist of?(
2 protons and 2 neutrons = Helium nucleus
What does gamma particles consist of?(
quantum of electromagnetic radiation of high energy
Define Becquerel
(number of disintegrations per second
The steps of RIA
separate unbound and measure thebound fraction
Definition of isotopes(
elements with same proton number but different neutron numbers
Which radiation has weakest effective pervasivness?(
alpha
