东北农业大学 蓄产品加工 乳笔记(Northeast Agricultural University dairy diary).docVIP

东北农业大学 蓄产品加工 乳笔记(Northeast Agricultural University dairy diary).doc

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东北农业大学 蓄产品加工 乳笔记(Northeast Agricultural University dairy diary)

东北农业大学 蓄产品加工 乳笔记(Northeast Agricultural University dairy diary) 540 lactose. Lactose and salts in milk are the major factors leading to the freezing point depression. Boiling point: the boiling point of milk is 101.33Kpa Specific heat: the sum of the components of each component. Conductivity: the presence of electrolytes in the milk that conducts the electric current. The conductivity of milk is related to its composition, especially the content of chloride and lactose. When the normal milk is 25 degrees centigrade, the conductivity is 0.001 Oxidation-reduction potential: if milk is contaminated by microorganisms, the reduction potential can be reduced with the consumption of oxygen and the reduction of metabolic products. Abnormal milk: the composition and properties of normal milk cow is basically stable, when feeding and management, disease and other factors, the impact of temperature, composition and properties of milk often change, the milk that abnormal milk, not suitable for processing high quality products. Abnormal milk classification: abnormal physiological milk: malnutrition, colostrum, milk, abnormal milk: high acidity, alcohol positive milk, low acidity alcohol positive milk. Frozen milk, low component milk. Mixed foreign body milk, abnormal flavor milk, microbial contamination milk, pathological abnormal milk: mastitis milk, other diseases milk. Causes and properties of abnormal milk: colostrum: endocrine milk for one week after calving. Properties: Brown, with odor, bitterness, viscosity, especially in three days, colostrum characteristics are more prominent. Fat, protein, especially whey, has high protein content. Milk: milk produced two weeks before dry periods. Alcohol positive milk: when dairy products are tested for raw milk, they are usually tested by 68% or 70% alcohol. Milk which produces a flocculent clot is called an alcohol positive milk. Low component milk: the dry matter of milk is less than 11%, and the rate of milk fat is less than 2.7

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