中国农业科学 ›› 2019, Vol. 52 ›› Issue (21): 3903-3923.doi: 10.3864/j.issn.0578-1752.2019.21.018
邓红1,2,3,雷佳蕾1,杨天歌1,刘旻昊1,孟永宏1,2,3(),郭玉蓉1,2,3,薛佳1,2,3(
)
收稿日期:
2019-04-29
接受日期:
2019-09-03
出版日期:
2019-11-01
发布日期:
2019-11-12
通讯作者:
孟永宏,薛佳
作者简介:
邓红,Tel:029-85310517;E-mail: 基金资助:
DENG Hong1,2,3,LEI JiaLei1,YANG TianGe1,LIU MinHao1,MENG YongHong1,2,3(),GUO YuRong1,2,3,XUE Jia1,2,3(
)
Received:
2019-04-29
Accepted:
2019-09-03
Online:
2019-11-01
Published:
2019-11-12
Contact:
YongHong MENG,Jia XUE
摘要:
目的 通过比较两种不同杀菌处理(高温短时High temperature short-time和超高压Ultra-high pressure杀菌)的非浓缩还原(Not from concentrate,NFC)苹果汁贮藏期品质变化,为我国NFC果汁产品标准的制定和规范市场NFC果汁产品货架期提供试验依据。方法 以‘红富士’苹果为原料制备NFC苹果汁,采用高温短时杀菌(HTST,98℃,50 s)和超高压杀菌(UHP,400 MPa,15 min)处理后,在4℃条件下冷藏,利用微生物学、化学及主成分分析(PCA)等方法以及HPLC、GC-MS等手段研究两种不同杀菌处理的NFC苹果汁贮藏期微生物、理化指标、多酚含量、酶(Polyphenol oxidase,PPO;Peroxidase,POD)活性、抗氧化活性、香气成分的变化。结果 HTST和UHP处理对细菌总数、大肠杆菌、霉菌与酵母的杀菌率均为100%,但贮藏第10、5周时果汁菌落总数分别呈显著增加(89.15%、58.65%),大肠杆菌、霉菌与酵母增殖速度不明显;贮藏期HTST和UHP两种处理NFC苹果汁微生物种群变化小,但优势菌属不同。两种处理的NFC苹果汁贮藏期可溶性固形物、pH、总酸的变化不大,但总色差显著增大(P<0.05);贮藏期HTST和UHP处理NFC苹果汁中表儿茶素分别下降了33%和53%,FRAP总抗氧化能力和DPPH自由基清除率分别保持在76%、73%和77%、76%,HTST处理NFC苹果汁的多酚含量和抗氧化活性明显高于UHP处理的样品;HTST处理后贮藏期NFC苹果汁的PPO与POD完全失活,但UHP处理样品的酶活性呈现先增大后降低的趋势。HTST处理后果汁18种特征香味物质总的保留率为52%,但贮藏期香气成分保持稳定;UHP处理NFC苹果汁的香气含量(57.75 mg/100 mL)接近对照样品(57.17 mg/100 mL),但贮藏期香气成分变化显著,降低了26.13%。结论 HTST和UHP杀菌处理的NFC苹果汁在4℃可分别贮藏9、4周,贮藏期内其品质满足商业要求,HTST处理NFC苹果汁货架期长于UHP处理。
邓红,雷佳蕾,杨天歌,刘旻昊,孟永宏,郭玉蓉,薛佳. 超高压和高温短时杀菌对NFC苹果汁贮藏期品质的影响[J]. 中国农业科学, 2019, 52(21): 3903-3923.
DENG Hong,LEI JiaLei,YANG TianGe,LIU MinHao,MENG YongHong,GUO YuRong,XUE Jia. Effect of Ultra-High Pressure and High Temperature Short-Time Sterilization on the Quality of NFC Apple Juice During Storage[J]. Scientia Agricultura Sinica, 2019, 52(21): 3903-3923.
"
不同处理 Different treatment | 贮藏时间(周) Storage time (week) | |||||||
---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 7 | 10 | ||
pH | Control | 4.01±0.3a | ||||||
UHP | 4.01±0.2a | 3.98±0.2abcd | 3.99±0.1abc | 4.00±0.1ab | 3.95±0.2d | — | — | |
HTST | 4.01±0.2a | 3.99±0.1abc | 3.98±0.1abcd | 3.99±0.1abc | 3.97±0.1bcd | 3.95±0.1d | 3.96±0.2cd | |
可滴定酸度 TA | Control | 0.342±0.01abc | ||||||
UHP | 0.339±0.01bc | 0.338±0.01c | 0.340±0.01abc | 0.339±0.02bc | 0.342±0.02abc | — | — | |
HTST | 0.341±0.02abc | 0.340±0.01abc | 0.341±0.01abc | 0.342±0.01abc | 0.343±0.01ab | 0.342±0.01abc | 0.344±0.01a | |
可溶性固形物TSS | Control | 11.9±0.2a | ||||||
UHP | 12.0±0.1a | 11.9±0.1a | 12.0±0.1a | 11.8±0.1a | 11.9±0.1a | — | — | |
HTST | 11.9±0.1a | 11.9±0.1a | 11.8±0.2a | 12.0±0.1a | 11.9±0.1a | 11.9±0.1a | 12.0±0.1a |
表2
超高压与高温短时杀菌处理的NFC苹果汁4℃贮藏期色值的变化"
不同处理 Different treatment | 贮藏时间(周)Storage time (week) | |||||||
---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 7 | 10 | ||
L* | Control | 33.26±0.05ab | ||||||
UHP | 33.48±0.04a | 32.66±0.03ab | 30.3±0.09c | 30.77±0.06c | 29.89±0.03c | — | — | |
HTST | 31.69±0.04bc | 31.55±0.05bc | 31.70±0.15bc | 30.35±0.14c | 30.22±0.12c | 30.19±0.06c | 30.01±0.11c | |
a* | Control | -1.77±0.05a | ||||||
UHP | -2.49±0.02ef | -2.53±0.01f | -2.44±0.04ef | -2.31±0.04cde | -2.17±0.01bc | — | — | |
HTST | -2.37±0.04cdef | -2.35±0.06cdef | -2.40±0.08def | -2.32±0.08bcde | -2.28±0.01bcde | -2.19±0.03bcd | -2.08±0.12b | |
b* | Control | 3.24±0.07a | ||||||
UHP | 2.59±0.02b | 2.65±0.02b | 2.60±0.12b | 2.55±0.02b | 2.50±0.04b | — | — | |
HTST | 2.59±0.11b | 2.50±0.06b | 2.61±0.14b | 2.54±0.09b | 2.51±0.04b | 2.48±0.08b | 2.44±0.11b |
表3
超高压与高温短时杀菌处理的NFC苹果汁4℃贮藏期酶活(多酚氧化酶和过氧化氢酶)的变化"
酶活 Enzymes activity | 不同处理Different treatment | 贮藏时间(周) Storage time (week) | |||||||
---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 7 | 10 | |||
PPO (△OD420?min-1·g-1) | Control | 0.023±0.0021bc | |||||||
UHP | 0.047±0.0017a | 0.029±0.001b | 0.022±0.0015bc | 0.026±0.0021bc | 0.019±0.0012c | — | — | ||
HTST | ND | ND | ND | ND | ND | ND | ND | ||
POD (△OD470?min-1·g-1) | Control | 0.14±0.0136cd | |||||||
UHP | 0.19±0.0175a | 0.15±0.0092bc | 0.14±0.011cd | 0.17±0.0121ab | 0.12±0.0075d | — | — | ||
HTST | ND | ND | ND | ND | ND | ND | ND |
表4
UHP与HTST杀菌的NFC苹果汁贮藏期香气成分的变化"
不同处理 Different treatment | 不同贮藏时间(周)的质量浓度(mg/100 mL) Mass concentration of aroma at different storage time (week) | ||||
---|---|---|---|---|---|
1 | 2 | 3 | 4 | ||
酯类Ester | |||||
乙酸乙酯 Ethyl acetate | Control | 0.36 | |||
UHP | 0.08 | 0.08 | 0.20 | 0.09 | |
HTST | 0 | 0.05 | 0.04 | 0.04 | |
乙酸丙酯 Propyl acetate | Control | 0.28 | |||
UHP | 0.45 | 0.43 | 0.31 | 0.37 | |
HTST | 0.13 | 0.14 | 0.16 | 0.14 | |
丁酸乙酯 Ethyl butyrate | Control | 0.28 | |||
UHP | 0.62 | 0.65 | 0.63 | 0.69 | |
HTST | 0.10 | 0.16 | 0.2 | 0.21 | |
丙酸丙酯 Propyl propionate | Control | 0.13 | |||
UHP | 0.17 | 0.17 | 0.18 | 0.20 | |
HTST | 0 | 0 | 0 | 0.08 | |
乙酸丁酯 Butyl acetate | Control | 3.68 | |||
HHP | 4.22 | 4.11 | 3.56 | 4.00 | |
TP | 2.59 | 3.38 | 2.50 | 2.66 | |
2-甲基丁酸乙酯 Ethyl 2-methylbutyrate | Control | 0.15 | |||
UHP | 0.28 | 0.30 | 0.30 | 0.33 | |
HTST | 0.03 | 0.05 | 0.03 | 0.04 | |
甲酸异戊酯 Isoamyl formate | Control | 7.42 | |||
UHP | 8.43 | 7.71 | 6.49 | 6.37 | |
HTST | 4.73 | 6.68 | 4.62 | 4.67 | |
丁酸丙酯 Propyl butyrate | Control | 0.83 | |||
UHP | 1.44 | 1.51 | 1.43 | 1.74 | |
HTST | 0.47 | 0.74 | 0.50 | 0.50 | |
丙酸丁酯 Butyl propionate | Control | 0.43 | |||
UHP | 0.35 | 0.35 | 0.33 | 0.35 | |
HTST | 0.16 | 0.24 | 0.16 | 0.17 | |
乙酸戊酯 Amyl acetate | Control | 0.56 | |||
UHP | 0.89 | 0.72 | 0.60 | 0.48 | |
HTST | 0.39 | 0.61 | 0.39 | 0.39 | |
己酸甲酯 Methyl caproate | Control | 0.04 | |||
UHP | 0.04 | 0.03 | 0.02 | 0 | |
HTST | 0 | 0.01 | 0.01 | 0.01 | |
2-甲基丁酸丙酯 Propyl 2-methylbutyrate | Control | 0.62 | |||
UHP | 0.79 | 0.87 | 4.59 | 0.92 | |
HTST | 0.12 | 0.19 | 0.13 | 0.13 | |
不同处理 Different treatment | 不同贮藏时间(周)的质量浓度(mg/100 mL) Mass concentration of aroma at different storage time (week) | ||||
1 | 2 | 3 | 4 | ||
2-戊醇丙酸酯 Pentylester; sec-amyl propionate | Control | 0.16 | |||
UHP | 0.15 | 0.14 | 0 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
丁酸丁酯 Butyl butyrate | Control | 1.14 | |||
UHP | 1.47 | 1.54 | 1.42 | 1.53 | |
HTST | 0.51 | 0.73 | 0.49 | 0.49 | |
己酸乙酯 Ethyl hexanoate | Control | 0.49 | |||
UHP | 0.51 | 0.39 | 0.45 | 0.27 | |
HTST | 0 | 0.14 | 0.17 | 0.15 | |
2-甲基丁酸丁酯 Butyl 2-methylbutyrate | Control | 0.87 | |||
UHP | 1.04 | 0.99 | 1.01 | 1.07 | |
HTST | 0.10 | 0.18 | 0.11 | 0.10 | |
苯甲酸甲酯 Methyl benzoate | Control | 0.26 | |||
UHP | 0.04 | 0 | 0 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
己酸丙酯 Caproic acid propyl ester grade I | Control | 0.19 | |||
UHP | 0.51 | 0.41 | 0.36 | 0.33 | |
HTST | 0.08 | 0.11 | 0.07 | 0.06 | |
丙酸己酯 Hexyl propionate | Control | 0.12 | |||
UHP | 0.16 | 0.08 | 0.06 | 0 | |
HTST | 0.04 | 0.06 | 0.03 | 0 | |
2-甲基丁酸-2-甲基丁酯 2-Methylbutyl -2-methylbutyrate | Control | 0.01 | |||
UHP | 0.14 | 0.13 | 0.13 | 0.16 | |
HTST | 0.01 | 0.01 | 0.2 | 0 | |
2-甲酸丁酸戊酯 2-Methanoic acid amyl butyrate | Control | 0.04 | |||
UHP | 0.06 | 0.05 | 0.05 | 0.04 | |
HTST | 0 | 0 | 0 | 0 | |
2-甲基丙酸己酯 Hexyl 2-methylpropionate | Control | 0.06 | |||
UHP | 0.05 | 0.26 | 0.05 | 0 | |
HTST | 0 | 0.34 | 0 | 0 | |
丁酸己酯 Hexyl butyrate | Control | 0.94 | |||
UHP | 1.04 | 0.53 | 0.23 | 0 | |
HTST | 0.31 | 0.37 | 0.21 | 0.18 | |
2-甲基丁酸己酯 Hexyl 2-methyl butyrate | Control | 1.61 | |||
UHP | 1.69 | 1.33 | 1.33 | 0 | |
HTST | 0.28 | 0.34 | 0 | 0.19 | |
葵酸甲酯 Methyl decanoate | Control | 0.11 | |||
UHP | 0.04 | 0 | 0 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
不同处理 Different treatment | 不同贮藏时间(周)的质量浓度(mg/100 mL) Mass concentration of aroma at different storage time (week) | ||||
1 | 2 | 3 | 4 | ||
己酸己酯 Hexyl hexanoate | Control | 0.15 | |||
UHP | 0.14 | 0.06 | 0.07 | 0.04 | |
HTST | 0.09 | 0.09 | 0.07 | 0.07 | |
十二烷酸甲酯 Methyl laurate | Control | 0.28 | |||
UHP | 0 | 0.04 | 0 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
癸酸癸酯 n-Capricacidn-decylester | Control | 1.31 | |||
UHP | 0 | 0 | 0 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
肉豆蔻酸甲酯 Methyl myristate | Control | 0.68 | |||
UHP | 0.05 | 0.02 | 0.03 | 0 | |
HTST | 0 | 0.08 | 0 | 0 | |
二十烷酸甲酯 Methyl eicosanoate | Control | 0.28 | |||
UHP | 0 | 0 | 0 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
(Z)-9-十六碳烯酸甲酯 Methyl-(z)-9-hexadecenoate | Control | 0.79 | |||
UHP | 0 | 0 | 0 | 0 | |
HTST | 0.13 | 0.08 | 0.02 | 0 | |
(Z)-9-十八碳烯酸甲酯 Methyl-(z):9-Octadecenoic acid, | Control | 0 | |||
UHP | 0.25 | 0.12 | 0.03 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
(Z)-十六烷-11-烯酸乙酯 (Z)-Hexadecane-11-ethyl oleate | Control | 1.26 | |||
UHP | 0.65 | 0.28 | 0.05 | 0.04 | |
HTST | 0.32 | 0.14 | 0.03 | 0.03 | |
十六烷酸甲酯 Methyl-hexadecanoate | Control | 0.24 | |||
UHP | 0.08 | 0.04 | 0 | 0 | |
HTST | 0.04 | 0.03 | 0 | 0 | |
(Z,Z)-9-十六碳烯酸-9-十六烯己酯 (Z,Z)-9-Hexadecanoic acid-9-hexadecanohexyl este | Control | 0 | |||
UHP | 0.06 | 0 | 0 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
戊酸乙酯 Ethyl valerate | Control | 0 | |||
UHP | 0..03 | 0.02 | 0 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
2-甲基丙酸丁酯 2-Methyl butyl propionate | Control | 0 | |||
UHP | 0.02 | 0.02 | 0 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
乙酸庚酯 Hepty lacetat | Control | 0 | |||
UHP | 0.02 | 0 | 0 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
不同处理 Different treatment | 不同贮藏时间(周)的质量浓度(mg/100 mL) Mass concentration of aroma at different storage time (week) | ||||
1 | 2 | 3 | 4 | ||
二十二酸壬酯 Nonyl Do decanoate | Control | 0 | |||
UHP | 0 | 0 | 0 | 0 | |
HTST | 0.02 | 0 | 0 | 0 | |
3-甲基-1-丁醇丙酸酯 3-Methyl-1-butanol propionate | Control | 0 | |||
UHP | 0 | 0 | 0 | 0.16 | |
HTST | 0.05 | 0 | 0.06 | 0 | |
2,6,10,14-四甲基-十五烷酸甲酯 2,6,10,14-Tetramethyl-pentadecanoic acid methyl ester | Control | 0 | |||
UHP | 0 | 0 | 0 | 0 | |
HTST | 0.12 | 0 | 0 | 0 | |
丁酸甲酯 Methyl butyrate | Control | 0 | |||
UHP | 0 | 0.03 | 0 | 0.03 | |
HTST | 0 | 0.01 | 0.01 | 0.01 | |
2-甲基丁酸甲酯 Methyl 2-methyl butyrate | Control | 0 | |||
UHP | 0 | 0.03 | 0.03 | 0.03 | |
HTST | 0 | 0 | 0 | 0 | |
正丁酯 n-Butyl ester | Control | 0 | |||
UHP | 0 | 0.05 | 0 | 0.05 | |
HTST | 0 | 0 | 0 | 0 | |
醇类Alcohols | |||||
乙醇 Ethanol | Control | 0.06 | |||
UHP | 0.02 | 0.02 | 0.04 | 0.02 | |
HTST | 0.02 | 0 | 0 | 0 | |
1-丁醇 1-Butanol | Control | 0.44 | |||
UHP | 0.69 | 0.71 | 0.71 | 0.89 | |
HTST | 0.57 | 0.56 | 0.64 | 0.63 | |
2-甲基-1-丁醇 2-Methyl-1-butanol | Control | 0.66 | |||
UHP | 0.91 | 0.99 | 0.96 | 1.23 | |
HTST | 0.71 | 0.75 | 0.74 | 0.74 | |
(E)-2-己烯-1-醇 (E) -2-hexene-1-ol | Control | 0.28 | |||
UHP | 0 | 0 | 0.22 | 1.18 | |
HTST | 0 | 0 | 0.08 | 0 | |
1-己醇 1-Hexanol | Control | 3.94 | |||
UHP | 13.08 | 3.99 | 4.88 | 4.75 | |
HTST | 1.47 | 1.68 | 1.76 | 1.44 | |
2-乙基-1-己醇 2-Ethyl-1-hexanol | Control | 0.28 | |||
UHP | 0 | 0 | 0.10 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
(S)-2-戊醇 (S) -2-Pentanol | Control | 0 | |||
UHP | 0.03 | 0.04 | 0.04 | 0.05 | |
HTST | 0 | 0.02 | 0.02 | 0.02 | |
不同处理 Different treatment | 不同贮藏时间(周)的质量浓度(mg/100 mL) Mass concentration of aroma at different storage time (week) | ||||
1 | 2 | 3 | 4 | ||
(S)-2-庚醇 (S) -2-Heptanol | Control | 0 | |||
UHP | 0.07 | 0.07 | 0.06 | 0.10 | |
HTST | 0.04 | 0.06 | 0.04 | 0.04 | |
2-甲基-1,3-戊二醇 2-Methyl-1,3-pentanediol | Control | 0 | |||
UHP | 0 | 0 | 0.04 | 0 | |
HTST | 0.02 | 0.02 | 0 | 0.02 | |
1-戊醇 1-Pentanol | Control | 0 | |||
UHP | 0 | 0.03 | 0.12 | 0.05 | |
HTST | 0.03 | 0.03 | 0.05 | 0.04 | |
1-丙醇 1-Propanol | Control | 0 | |||
UHP | 0 | 0.04 | 0 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
1-辛醇 1-Octanol | Control | 0 | |||
UHP | 0 | 0 | 0.02 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
2-甲基-1-丙醇 2-Methyl-1-propanol | Control | 0 | |||
UHP | 0 | 0 | 0 | 0.03 | |
HTST | 0 | 0 | 0 | 0 | |
二环丙基甲醇 Dicyclopropyl methanol | Control | 0 | |||
UHP | 0 | 0 | 0 | 0.05 | |
HTST | 0 | 0 | 0 | 0 | |
醛类Aldehyde | |||||
乙醛 Acetaldehyde | Control | 0.05 | |||
UHP | 0 | 0.02 | 0.02 | 0.02 | |
HTST | 0 | 0 | 0 | 0 | |
戊醛 Pentanal | Control | 0.08 | |||
UHP | 0 | 0 | 0.04 | 0 | |
HTST | 0.02 | 0.02 | 0.02 | 0.02 | |
己醛 Hexanal | Control | 6.71 | |||
UHP | 9.32 | 8.00 | 5.57 | 7.04 | |
HTST | 3.36 | 3.98 | 1.53 | 2.97 | |
(E)-2-己烯醛 (E) -2-Hexenal | Control | 3.52 | |||
UHP | 4.79 | 4.62 | 2.38 | 3.59 | |
HTST | 1.05 | 1.50 | 0.21 | 0.69 | |
(E)-2-辛烯醛 (E) -2-Octene aldehyde | Control | 0.17 | |||
UHP | 0.04 | 0.05 | 0.07 | 0.05 | |
HTST | 0 | 0 | 0 | 0 | |
壬醛 Nonyl aldehyde | Control | 0.40 | |||
UHP | 0.06 | 0.03 | 0.15 | 0.03 | |
HTST | 0.09 | 0 | 0.06 | 0.06 | |
不同处理 Different treatment | 不同贮藏时间(周)的质量浓度(mg/100 mL) Mass concentration of aroma at different storage time (week) | ||||
1 | 2 | 3 | 4 | ||
癸醛 Decyl aldehyde | Control | 1.31 | |||
UHP | 0.22 | 0.08 | 0.11 | 0 | |
HTST | 0.09 | 0.06 | 0.02 | 0.02 | |
丁醛 Butyraldehyde | Control | 0 | |||
UHP | 0.02 | 0.02 | 0.02 | 0.02 | |
HTST | 0.01 | 0.01 | 0 | 0.01 | |
庚醛 Heptanal | Control | 0 | |||
UHP | 0.02 | 0 | 0.05 | 0 | |
HTST | 0 | 0.02 | 0.03 | 0.04 | |
酮类Ketones | |||||
丙酮 Acetone | Control | 0.06 | |||
UHP | 0 | 0.02 | 0.06 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
2-辛酮 2-Octanone | Control | 0.07 | |||
UHP | 0.06 | 0.06 | 0.09 | 0.09 | |
HTST | 0.06 | 0.06 | 0.06 | 0.06 | |
6-甲基-5-庚烯-2-酮 6-Methyl-5-heptene-2-one | Control | 0.11 | |||
UHP | 0.05 | 0.06 | 0.08 | 0.13 | |
HTST | 0.04 | 0.05 | 0.03 | 0.04 | |
顺式-5-甲基-2-(1-甲基乙基)- 环己酮 Cis-5-methyl-2-(1-methylethyl)- cyclohexanone | Control | 0.07 | |||
UHP | 0 | 0 | 0 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
(Z)-6,10-二甲基-5, 9-十一碳二烯-2-酮 (Z)-6,10-Dimethyl-5,9- undecadien-2-one | Control | 0.05 | |||
UHP | 0 | 0 | 0.02 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
2-庚酮 2-Heptanone | Control | 0.05 | |||
UHP | 0 | 0 | 0.03 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
2-(1,5-二甲基-己基)-环丁酮 2-hexyl-1,5-dimethyl- Cyclobutanone | Control | 0.05 | |||
UHP | 0 | 0 | 0.02 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
萜烯类Terpene | |||||
D-柠檬烯 d-Limonene | Control | 0.58 | |||
UHP | 0 | 0 | 0.11 | 0.07 | |
HTST | 0 | 0 | 0.06 | 0 | |
长叶烯 d-Longifolene | Control | 0.08 | |||
UHP | 0 | 0 | 0 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
不同处理 Different treatment | 不同贮藏时间(周)的质量浓度(mg/100 mL) Mass concentration of aroma at different storage time (week) | ||||
1 | 2 | 3 | 4 | ||
反式-α-香柠檬烯 Trans-alpha-citrine | Control | 0.05 | |||
UHP | 0 | 0.04 | 0.04 | 0 | |
HTST | 0.04 | 0.04 | 0.03 | 0 | |
α-法尼烯 αFarnesene | Control | 1.70 | |||
UHP | 1.73 | 1.42 | 1.34 | 1.10 | |
HTST | 1.41 | 1.65 | 1.27 | 1.46 | |
2,5,5-三甲基-1,6-庚二烯2,5,5-Trimethyl-1,6-heptadien | Control | 0 | |||
UHP | 0 | 0 | 0 | 0 | |
HTST | 0.04 | 0.05 | 0.04 | 0.04 | |
酸类Acid | |||||
正癸酸 n-Decanoic acid | Control | 0.07 | |||
UHP | 0 | 0 | 0 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
醚类Ethers | |||||
草蒿脑 Estragole | Control | 0.11 | |||
UHP | 0.07 | 0.06 | 0.05 | 0.05 | |
HTST | 0.02 | 0.03 | 0.01 | 0.01 | |
茴香脑 Anethole | Control | 0.24 | |||
UHP | 0 | 0 | 0.03 | 0 | |
HTST | 0 | 0 | 0 | 0 | |
反式芳樟醇氧化物(呋喃型) Trans linalool oxide (furan type) | Control | 0 | |||
UHP | 0 | 0 | 0 | 0.03 | |
HTST | 0.02 | 0 | 0 | 0 |
图4
基于16S rRNA基因焦磷酸测序分析的DNA排名前10的物种OTU相对丰度 Control:未处理的NFC苹果汁;HHP1、2、3、4、5:贮藏期超高压处理的NFC苹果汁1、2、3、4、5周;HTST1、3、5、7、10:超高温瞬时杀菌处理的NFC苹果汁1、3、5、7、10周。A-E依次是OTU按门、纲、目、科、属分类水平分类 CK: Untreated NFC apple juice; HHP1, 2, 3, 4, 5: NFC apple juice treated with ultra-high pressure during storage 1, 2, 3, 4, and 5 weeks; HTST1, 3, 5, 7, 10: NFC apple juice treated with ultra-high temperature instantaneous sterilization 1, 3, 5, 7, and 10 weeks. A-E: OTU is classified according to the door, outline, purpose, and department, respectively"
表5
超高压与高温短时灭菌处理的NFC苹果汁4℃贮藏期微生物指标的变化"
不同处理 Different treatment | 贮藏时间 (周) Storage time (week) | |||||||
---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 7 | 10 | ||
菌落总数 Total number of colonies | Control | 3.41±0.16a | ||||||
UHP | ND | ND | ND | ND | 2.00±0.18b | — | — | |
HTST | ND | ND | ND | ND | ND | ND | 3.04±0.31b | |
霉菌酵母 Mold and yeast | Control | 4.78±0.11a | ||||||
UHP | ND | ND | ND | ND | ND | — | — | |
HTST | ND | ND | ND | ND | ND | ND | ND | |
大肠杆菌 Escherichia coli | Control | 3.08±0.07a | ||||||
UHP | ND | ND | ND | ND | ND | — | — | |
HTST | ND | ND | ND | ND | ND | ND | ND |
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