SFC (solid fat content)

Question 1

What is the plastic range?

Answer 1

temp range at which a fat can be easily deformed.

Question 2

Why is fat plastic?

Answer 2

because it is a liquid in solid (crystalline) mixture. The cystaline structure is holded by van der wall bonds that are easily broken and can reformed also easily.

Question 3

What is polymorphism?

Answer 3

the capability of TG to crystallize in a variety of different crystals and to change from one form to the other.

Question 4

T or F : you can determine the solid fat content with dialometry

Answer 4

false, it is the solid fat index

Question 5

Higer is the temperature of fat/oil mixture, and ____ is the density

Answer 5

lower (because higher is the specific volume).

Question 6

What are the two ways to measure the solid fat

Answer 6

Dialometry and NMR

Question 7

What is measured in dialometry?

Answer 7

teh change in specific volume per unit temperature

Question 8

What are the three phases of the curve of dialometry?

Answer 8

a- volume expansion of fat b- expansion due to change in state c-volume expansion of oil

Question 9

What is NMR ?

Answer 9

tehcnique to measure the SFC by probing using radio waves and magnetic field. Higher is the NMR signal and the more there is liquid in the fat

Question 10

What is the structure of alpha, beta and B’

Answer 10