Table 5
Changes in browning index and turbidity of birch sap treated under HPP conditions during cold storage at 5 and 10℃

Sample1)	Storage period (day)	Browning index	Turbidity
C-5	1	0.031±0.002)^a3)	0.014±0.002^a
C-5	13	0.238±0.005^b	0.140±0.005^c
H-5	1	0.039±0.001^a	0.024±0.001^b
H-5	13	0.039±0.005^a	0.020±0.001^ab
C-10	1	0.031±0.002^a	0.014±0.002^a
C-10	13	0.332±0.001^c	0.191±0.004^b
H-10	1	0.056±0.006^b	0.021±0.004^a
H-10	13	0.033±0.002^a	0.015±0.006^a

C-5, non-treated birch sap during storage at 5℃; H-5, birch sap treated with 550 MPa pressure for 120 sec during storage at 5℃; C-10, non-treated birch sap during storage at 10℃; H-10, birch sap treated with 550 MPa pressure for 120 sec during storage at 10℃.
Values are means SD of triplicate determinations.
Different superscripts within the each column (storage temperature groups) indicate significant differences (p<0.05).