1. , . . 2. . 3. . 4. . . 5. . 6. . . 9–11 . , - . : 1 100
1. , , . 10–12 . 2. . . . . 3 . . 3. 20–25 . , 4 °C. 4 . : 1 100 5–7 , . 40 .
" ": 1 - 10 2 - ... 16 - 17 - 18 - 19 - 20 -