Dairy Chemistry And Biochemistry

LACTOSE 23 0 it contributes to the nutritive value of milk and its products; however, many non-Europeans have limited or zero ab ...

DAIRY CHEMISTRY AND BIOCHEMISTRY H B H-C-OH HO-C-H HO-C-H H-C I H-C CHzOH I ' CHzOH -$ OH O-&D-CPLPetopyrPnaPyl~i~)-@-D-Gluc ...

LACTOSE 25 Glucose- 1 -phoSPhE UDP gliiccisr-4-rpinier.osr gnlncros~llrr~~l~?.\:fr,.cl.vr cr-I~/ctnlDu/ttil? *LACTOSE Glucose Fi ...

26 DAIRY CHEMISTRY AND BIOCHEMISTRY oL I I I I 2 4 6 8 PH Figure 2.4 Effect of pH on the rate of mutarotation of lactose. At equ ...

LACTOSE^27 2.2.4 Signgcance of mutarotation The a- and 8-forms of lactose differ with respect to: 0 solubility; 0 crystal shape ...

Solubility, g anhydrous lactose I100 g water --*- sggggsggg ...

LACTOSE 200 100 29 2.1 1 Figure 2.6 Initial solubility of a-lactose and b-lactose, final solubility at equilibrium (line l ...

30 DAIRY CHEMISTRY AND BIOCHEMISTRY Figure 2.7 The most common crystal form of a-lactose hydrate. 93.5"C. The a-hydrate is the s ...

LACTOSE 31 Table 2.3 Some physical properties of the two common forms of lactose (modified from Jenness and Patton, 1959) Proper ...

32 LACTOSE IN SOLUTION a-b [Pl/[al= 1.64-0.0027T DAIRY CHEMISTRY AND BIOCHEMISTRY L .- Amorphous Lactose V a-Hydrate (lactose. I ...

LACTOSE 33 MILK,WHEY, PERMEATE Rapid drying Concentrated lactose syrup * “LACTOSE GLASS” (Non-crystalline) a-HYDRATE Cryslalliza ...

34 DAIRY CHEMISTRY AND BIOCHEMISTRY has a pronounced tendency to cake owing to its very high lactose content ( - 70%). Problems ...

LACTOSE 35 Figure 2.11 Schematic representation of a straight through drying plant for whey (modified from Hynd, 1980). Thermopl ...

36 DAIRY CHEMISTRY AND BIOCHEMISTRY Crystalline lactose (%) 45 55 65 75 1 I I^3 0 4 8 12 16 Lactic acid added (%) Figure 2.12 Ef ...

LACTOSE 37 110 - 100 - h 90- * : E 80- E ?L 2 3 .- ‘ 70- 60 0 1 2 3 4 5 Powder moisture (%) Figure 2.13 Influence of moisture ...

38 DAIRY CHEMISTRY AND BIOCHEMISTRY when the opportunity arises and they tend to grow slowly with time, eventually causing a san ...

Po 3 C. 1 %P Protein flocculation- EL Ern volume of precipitate, ml fur W W ...

40 DAIRY CHEMISTRY AND BIOCHEMISTRY W" It / 1 ii 7 Srrd , Figure 2.15 Schematic representation of plant for the manufacture of c ...

LACTOSE 41 Table 2.5 Some typical physical and chemical data for various grades of lactose" (from Nickerson, 1974) Analysis Ferm ...

42 DAIRY CHEMISTRY AND BIOCHEMISTRY Table 2.8 Relative humectancy of sucrose, glucose and lactose (% moisture absorbed at 20°C) ...