Table 7
Effect of HPP on microorganism in birch sap dur ing storage at 5 and 10℃ (unit: log CFU)

Sample1)	Storage period (days)	Total bacteria	Coliform	E.coil	Fungi
C-5	1	1.54±0.702)	ND	Negative	0.60±0.30
	7	TNTC3)	TNTC	Negative	0.48±0.00
	13	TNTC	TNTC	Negative	0.60±0.00
H-5	1	ND4)	ND	Negative	ND
	7	ND	ND	Negative	ND
	13	ND	ND	Negative	ND
	18	ND	ND	Negative	ND
	24	ND	ND	Negative	ND
	30	ND	ND	Negative	ND
	36	ND	ND	Negative	ND
	42	ND	ND	Negative	ND
	45	ND	ND	Negative	ND
C-10	1	1.54±1.18	ND	Negative	0.65±0.18
	4	TNTC	TNTC	Negative	1.28±0.78
	8	TNTC	TNTC	Negative	ND
	13	TNTC	TNTC	Negative	ND
H-10	1	ND	ND	Negative	ND
	4	ND	ND	Negative	ND
	8	ND	ND	Negative	ND
	13	ND	ND	Negative	ND
	16	ND	ND	Negative	ND
	21	ND	ND	Negative	ND
	24	ND	ND	Negative	ND

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℃.
All results are expressed as means for three replicates.
TNTC, Too numerous to count (>1.0×10³ CFU/mL).
ND, Not detected.