Intro to SEM - Sample Preparation Flashcards
What are 6 types of Electron Microscopes?
What does an SEM do? and how does it work?
What is a TEM? and how does it work?
What is the difference between SEM and TEM?
What is the Resolotion of the following:
- Human Eye
- Light Scope
- SEM
- TEM
What is the difference in sample preperation between a biological sample and non-biological sample?
What is important in sample preparation for an SEM?
Why do we clean the surface of the specimen? and what techniques are used?
Why do we fixate a specimen? Why is fixation so important?
What is a common fixative?
Why do we dehydrate biological samples?
How do we dehydrate a sample?
Describe the following drying methoda:
- Air Drying
- Critical Point Drying (CPD)
- Freeze Drying
What is the Critical Point? and describe the CPD process?
Critical Point = temperature/pressure combination specific for the transitional fluid at which point a transition occurs and the density of the liquid phase equals that of the vapor phase
How do we freeze dry a speciment?