What do you mean by milk foams, Chemistry

Assignment Help:

Q. What do you mean by Milk Foams?

The proteins and water in milk are extended into thin films by agitation. These thin films enclose small air bubbles to make foam in which the protein and water provide the continuous network of the colloidal dispersion, and the air is the discontinuous or dispersed phase. This arrangement is possible because the native proteins in milk have a low surface tension and low vapour pressure. The low surface tension makes it possible to spread the liquid proteins into thin films, and the low vapour pressure reduces the likelihood that evaporation will occur.

In fluid milks, the concentration of protein is too low to permit the production of foam with any stability. However, evaporated milk can be whipped into foam with a very large volume. The increased protein and fat concentrations of undiluted evaporated milk make it possible for the foam to form, and the foam will even have some limited stability. Foam formation and stability are enhanced if the undiluted evaporated milk is chilled until ice crystals start to form in it. This condition causes the fat to be rather firm, which concentrates the protein in the remaining unfrozen water and also helps to give some rigidity to the cell walls in the foam.

Stability can be achieved by adding lemon juice because the acid promotes precipitation of the milk proteins to give more strength to the cell walls.


Related Discussions:- What do you mean by milk foams

Determine uncertainty of velocity, Uncertainty in position of a 0.25 g par...

Uncertainty in position of a 0.25 g particle is 10 -5   . Uncertainty of velocity  ( h = 6.6 x 10 -34 Js) is: (1)  1.2 x 10 34       (2)  2.1 x 10 -29   (3)  1.6 x 1

Mechanism of Methanol, What are the different mechanism to produce methanol...

What are the different mechanism to produce methanol(CH3OH)?

What are the compositions of the equilibrated top layers, What are the comp...

What are the compositions of the equilibrated top Layers? Figure is a temperature-composition phase diagram for the binary system of water (A) and phenol (B) at 1 bar. These li

Polarization in a dielectric on application electric field, Polarization in...

Polarization in a dielectric on application of electric field is Displacement/separation of opposite charge centres.

Determine the crude fibre content in the given of flour, Q. Determine the c...

Q. Determine the crude fibre content in the given of flour? To determine the crude fibre content in the given sample of flour. After undertaking this activity, you will be a

Moles!, a tablet of extra strength tylenol contains 5.00x10^2 mg of acetami...

a tablet of extra strength tylenol contains 5.00x10^2 mg of acetaminophen. Calculate the number of moles of acetaminophen present in one tablet of extra strength tylenol?

Characterization of wastewater, a) Describe why not all of the organic matt...

a) Describe why not all of the organic matter in wastewater is converted to carbon dioxide and water in biological treatment. b) What is the importance of the BOD in the charact

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd