Lab 7 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 are the weakest Ionizing ability
Gamma
My own remembering rule for Radioactive radiations
Aplha left, Gamma right EPI E: Short - Long P: Weak - Strong I: Strong - Weak
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 the bound fraction
Definition of isotopes
Elements with same PROTON number but different NEURON numbers
Which radiation has weakest effective pervasivness?
Alpha
