Lab 7 Flashcards

1
Q

List the 3 possible interactions btw gamma radiation and matter.

A

Photoelectric effect,
Compton Scattering and
Pair production

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2
Q

What is Compton Scattering?

A

γ-photon colliding with free or loosly bound electron in the absorber

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3
Q

Which radiation type has the highest ionizing ability?

A

Alpha

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4
Q

Where is progesterone produced?

A

Ovary, and small amounts in adrenal medulla

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5
Q

What is detected in pregnancy in humans?

A

Presens of hCG secretion by trophoblast cells in placenta

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6
Q

What is pair production?

A

May happend when high energy photon come near atomic nucleus of the absorber

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7
Q

Give step of ELISA?

A
  • 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
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8
Q

What is the shortest effective distance?

A

Alpha

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9
Q

What is the strongest pervasive radiation?

A

Gamma

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10
Q

Which are the weakest Ionizing ability

A

Gamma

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11
Q

My own remembering rule for Radioactive radiations

A
Aplha left, Gamma right
EPI
E:  Short - Long
P: Weak - Strong
I: Strong - Weak
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12
Q

Which ions inhibit iodine accumulation?

A

Thiocyanate ions

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13
Q

Particles in Beta-radiation

A

Electron and

Positron

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14
Q

Which radiation has longest effective distance?

A

Gamma

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15
Q

Which radiation has strongest effective pervasivness?

A

Gamma

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16
Q

Name the isotopes of hydrogen.

A

Protium,
Deuterium and
Tritium

17
Q

What is background count?

A

Cosmic radiation and

Internal electronic noise of the apparatus

18
Q

How to detect progesterone in blood?

A

ELISA + RIA

19
Q

Which animals can estrone sulphate be detected in the blood by ELISA or RIA?

A

Swine and

Horse

20
Q

Most common Hydrogen isotope?

A

Protium

21
Q

What does alfa particles consist of?

A

2 protons and 2 neutrons = Helium nucleus

22
Q

What does gamma particles consist of?

A

Quantum of electromagnetic radiation of high energy

23
Q

Define Becquerel

A

Number of disintegrations per second

24
Q

The steps of RIA

A

Separate unbound and measure the bound fraction

25
Q

Definition of isotopes

A

Elements with same PROTON number but different NEURON numbers

26
Q

Which radiation has weakest effective pervasivness?

A

Alpha