Chemical definition
Chemically milk is defined as an emulsion of fat in watery solution of sugar and mineral salts and with proteins in a colloidal state.
Emulsion: A creamy liquid in which particles of oils are suspended.
Colloidal: State or form in which diffusion rate is very slow and produce considerable amount of light scattering phenomena in solution.
Solution: Form or state in which calculated amount of solute when dissolved in known volume of solvent is known as solution.
Colostrum:
The milk produced by an animal immediately after parturition from 3 to 10 milking following is known as colostrum. The composition differ from the normal milk that, It is low in water, sugar and fat percent and higher in casein, albumin, globulin and ash contents.
Table: The average chemical composition of milk of different species (Percentage Composition)
|
Name of Species |
Water |
Fat |
Protein |
Lactose |
Ash |
|
Ass |
90.0 |
1.3 |
1.7 |
6.5 |
0.5 |
|
Buffalo |
84.2 |
6.6 |
3.9 |
5.2 |
0.8 |
|
Camel |
86.5 |
3.1 |
4.0 |
5.6 |
0.8 |
|
Cat |
84.6 |
3.8 |
9.1 |
4.9 |
0.6 |
|
Cow |
86.6 |
4.6 |
3.4 |
4.9 |
0.7 |
|
Dog |
75.4 |
9.6 |
11.2 |
3.1 |
0.7 |
|
Elephant |
67.8 |
19.6 |
3.1 |
8.8 |
0.7 |
|
Ewe |
79.4 |
8.6 |
6.7 |
4.3 |
1.0 |
|
Goat |
86.5 |
4.5 |
3.5 |
4.7 |
0.8 |
|
Guinea-pig |
82.2 |
5.5 |
8.5 |
2.9 |
0.9 |
|
Human |
87.7 |
3.6 |
1.8 |
6.8 |
0.1 |
|
Llama |
86.5 |
3.2 |
3.9 |
5.6 |
0.8 |
|
Mare |
89.1 |
1.6 |
2.7 |
6.1 |
0.5 |
|
Porpoise |
41.1 |
45.8 |
11.2 |
1.3 |
0.6 |
|
Reindeer |
68.2 |
17.1 |
10.4 |
2.3 |
1.5 |
|
Sow |
89.6 |
4.8 |
1.3 |
3.4 |
0.9 |
|
Whale |
70.1 |
19.6 |
9.5 |
– |
1.0 |