Biological Effects of Radiation
Objectives
This curricular unit aims to provide a comprehensive understanding of the effects of ionizing radiation in biological systems. Mainly, it seeks to provide understanding of the interaction of ionizing radiation with matter on the molecular level and how molecular-level effects lead to damage at the cell and tissue levels.
At the end of this curricular unit, students should be able to:
- Understand the effect of radiation on atoms and molecules;
- Distinguish between different mechanisms of damage at the molecular level;
- Understand the systems of defense, and repair, against radiation damage;
- Use of radiation in the characterization of biomolecules
Critically review the scientific literature pertinent in this field.
General characterization
Code
10801
Credits
3.0
Responsible teacher
Pedro António de Brito Tavares
Hours
Weekly - 2
Total - 30
Teaching language
Português
Prerequisites
Optional. No mandatory requirements.
Bibliography
- “Radiation Biology: A Handbook for Teachers and Students”, training course series no. 42, International Atomic Energy Agency, Vienna, 2010.
- “Essentials of Radiation, Biology and Protection”, Steve Forshire, Delmar Cengage Learning; 2 edition, 2008.
- A. S. Pereira, P. Tavares, P. Limão-Vieira, Eds. , Radiation in Bioanalysis: Spectroscopic Techniques and Theoretical Methods, Springer International Publishing, Cham, 2019
- Vários artigos publicados em revistas científicas internacionais.
Teaching method
The contents of the curricular unit will be presented in two classes: i) theoretical classes, illustrated whenever possible with practical cases; and ii) seminar classes, that will include presentation and group discussion of an article published in an international journal. It will also be asked that students prepare an individual essay in specific chosen themes. Evaluation will take into account the presentation (40%) and the essay (60%).
Evaluation method
CF = 0.35 x DP + 0.30 x P + 0.30 x AO + 0.05 x D
Where
CF = final grade, rounded to the nearest integer;
AO = Oral presentation of the project
D = Contribution to the debate
P = Project poster (in English)
DP = Project discussion
Attendance at 70% of the theoretical-practical classes is required to obtain an attendance grade.
In any case, the course leader reserves the right to give an oral exam, for final approval, to any student enrolled in the course.
Subject matter
1. Introduction and Historical Perspective
2. Sources and types of Ionizing Radiation
- Particulate vs. Electromagnetic
- Atomic structure, origin and nature of ionizing radiation
- Radiation dose and units
- Principles of radiation dosimetry
- Interaction of radiation with matter
3. Introduction to Radiation Chemistry
- Water radiolysis
- Free radical formation
- Direct vs indirect effects
4. Radiation-induced cell death
- Survival curves in vivo and in vitro
- Damage repair at the cellular level
- Dose rate effects
5. Radiation effects on cell cycle
6. Antioxidants
7. Radiation Effects on DNA
- Type of damage caused by ionizing radiation
- Radiation induced mutations
- Chromosome and chromatid aberrations
- DNA repair mechanisms
8. Radiation effects on proteins and lipids
9. Use of radiation in the characterization of biomolecules