Sunday, July 7, 2013

Milk fat globules

The milk fat included in the globules is the major native form of milk fat. The milk fat globule is a spherical particle that is the form in which milk fat is secreted in milk. The physical, chemical and technological properties of milk fat globules are influenced by their size.

In milk as secreted by the cow these globules average about 10 microns in diameter, with a range from 0.1 microns to ~15 microns.

The globules were significantly higher in the milk with the highest fat content.

Milk fat globule membrane is a delicate structure and can easily be ruptured by either physical or thermal shock. It forms around fat globules as they pass from secretory cells in the cow’s udder into the milk. All interactions between fats and plasma must take place through the membrane.

When the milk fat globule membrane is intact, it protects the fat exposure to naturally occurring lipase enzymes and the resulting development of a rancid off-flavor.

The density of the milk fat globules is much lower than that of the m ilk serum and as a result, milk fat globules rise at form a fat rich phase, a process commonly called creaming.

In the globule, fatty fractions e.g. sterols, triglycerides that are less soluble in water are found in the interior of the globule.

The lipids of milk fat serve nutritionally as an energy source, act as a solvent for the fat soluble vitamins and supply essential fatty acids.
Milk fat globules

The most popular posts

  • Citrus is the largest genus in the family Rutaceae and is the most traded horticultural product in the world. Consumption of citrus fruits or their product...
  • People accept food on the basis of certain characteristics that they define and perceive with their senses. Food color has been usually related to the pro...
  • Riboflavin is also known as vitamin B2. The primary form of the vitamin is as an integral component of the coenzymes flavin mononucleotide (FMN) and flavin...
  • Originally from Central Asia, garlic is one of the earliest of cultivated plants. Historical evidence shows it was uses by the Babylonians 4500 years ago. ...

SAF-DYNAMICS of Food Science and Technology