
chap4 cntbdv
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Biology
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University
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60 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which is traditional scaffold fabricating methods?
1. Solvent casting particulate leaching
2. Gas foaming
3. Phase separation
4. Melt moulding
5. Emulsion freeze-drying
6. Solution casting
7. Freeze-drying
8. Stereolithography Apparatus (SLA) system
9. Fused Deposition Modeling (FDM)
1,2,3
4, 5, 6
7, 8, 9
1, 2, 3, 4, 5, 6, 7
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Arrange the following steps into a scaffolding process of phase separation?
1: Dissolving polymers in phenol or naphthalene
2: Add bioactive molecules (such as alkaline phosphatase)
3: Lower the temperature
4: Solvent sublimation
5: Scaffold foam with biological molecules that work inside the structure
6: Solvent evaporation
7: Dissolving PLA in methylene chloride one more time
1, 2, 3, 4, 5
7, 5, 4, 3, 1
2, 6, 3, 5, 4
2, 7, 5, 4, 3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which is Solid freeform fabrication (SFF)?
1. Three dimensional printing (3DP)
2. Stereolithography Apparatus (SLA) system
3. Fused Deposition Modeling (FDM)
4. Plotter 3D system
5. Phase change jet printing
6. Melt moulding
7. Emulsion freeze-drying
8. Solution casting
1, 2, 3, 4, 5
1, 2, 4, 8
3, 5, 6, 7
All above correct
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the common materials for scaffolds?
1. PPF (Poly(propylene fumarate))
2. PGA (Poly(glycolic acid))
3. PLA (poly(lactic acid))
4. PLGA (poly(lactic acid-co-glycolic acid))
5. PCL (poly(ε-caprolactone) )
6. PHB (poly(hydroxy butyrate))
7. PVC (Polyvinyl clorua)
8. PE (polyetylen)
1, 2, 3, 4, 5, 6
2, 4, 5, 7, 8
2, 3, 4, 7
1, 7, 8, 9
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In phase separation, we lower the temperature for what purpose?
Create liquid-liquid phase separation and cool to make a two-phase solid
Cool to make a two-phase solid and dry scaffold
Soak gelatin in water to remove and dry scaffold
Create liquid-liquid phase separation and Created scaffold has the shape of the mold
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the limitations of tissue engineering scaffold by using gas foaming method?
Only 10-30% of pores are interconnected. The mesh fibers have weak mechanical properties. Solvent backlog make high risk of toxins and cancer
Can not ensure the interconnection of pores.
Only thin scaffold layers can be created because it is difficult to remove salt particles inside the mold.
Can not control exactly the size and shape of pores
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which scaffold parameters the solid freeform fabrication (SFF) method can controls ?
Pore size, porous state, the distribution of pores, as well as how to organize the artificial vessel system
Pore size, the spatial distribution of pores
Porous state, pore size
The mesh fibers have weak mechanical properties
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