What are the physico-chemical properties of milk? How knowledge of physico-chemical properties of milk helps in effective quality control and processing of milk to different value added dairy products?

Milk is a complex fluid consisting of water, fats, proteins, carbohydrates, minerals, and vitamins. Understanding the physico-chemical properties of milk is crucial for ensuring its quality, safety, and suitability for processing into various dairy products. The physico-chemical properties include physical characteristics such as color, density, viscosity, freezing point, and chemical characteristics like pH, acidity, protein content, fat content, lactose content, and mineral composition.

The color of milk is usually white to slightly yellowish due to the presence of fat globules and carotene. Changes in color can indicate adulteration or spoilage. Density or specific gravity measures the weight of milk relative to water and varies with fat content; this helps detect dilution or adulteration. Viscosity refers to the thickness or flow properties of milk, which can change due to temperature or composition alterations. The freezing point of milk is an important property used to detect added water, as pure milk freezes around -0.54°C; _________ _____ _________ _______ ____ _______ ______ ____ ________ ________ ____ __________.
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