• Title/Summary/Keyword: high hydrostatic pressure

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Effect of Enhancement on Functionality of Germinated Adzuki Bean (Angularis angularis var. nipponensis) with High Hydrostatic Pressure (HHP) Treatment (고압처리에 의한 발아팥의 기능성 향상 효과)

  • Kim, Min Young;Jang, Gwi Yeong;Lee, Yoonjeong;Kim, Kyung Mi;Kang, Tae Su;Lee, Junsoo;Jeong, Heon Sang
    • The Korean Journal of Food And Nutrition
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    • v.31 no.1
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    • pp.135-142
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    • 2018
  • We investigated the influence of germination and high hydrostatic pressure (HHP) treatment conditions on the conversion of functional compounds and antioxidant activity in adzuki bean. The adzuki bean germinated at $25^{\circ}C$ for three- or six-days, and was later subjected to HHP at 0.1, 50, 100, or 150 MPa for 24 h. The highest polyphenol content (5.36 mg gallic acid equivalents (GAE)/g) and flavonoid content (0.91 mg catechin equivalents (CE)/g) were observed after germination for six days and HHP treatment at 100 MPa for 24 h, respectively. The total phenolic acid contents increased with increasing applied pressure from 88.86 to $208.26{\mu}g/g$ (100MPa, 24h). Phenolic acids are divided into two categories; those that exhibit increased content upon HHP treatment, and those that exhibit decreased content. The increasing phenolic acids were gallic acid, chlorogenic acid, (+)-catechin, ${\rho}-coumaric$ acid, ferulic acid, heperidin, salicylic acid, protocatechuic acid, cinnamic acid, naringenin. The total anthocyanin content decreased with increasing applied pressure from 22.42 mg/100 g to 6.28 mg/100 g (150 MPa, 24 h). The highest ABTS radical scavenging activity (8.02 mg eq AA/g) and DPPH radical scavenging activity (1.22 eq Trolox/g) were observed after germination for six days and HHP treatment at 100MPa for 24h, respectively. These results suggested that the combination of HHP and germination can lead to improved functionality in adzuki bean.

Improvement in Storage Stability of Danmooji (Salted Radish) by High Hydrostatic Pressure and Heat Treatment (초고압과 열처리를 통한 단무지의 저장성 향상)

  • Kim, Byong-Ki;Hong, Kwan-Pyo;Park, Ji-Yong
    • Korean Journal of Food Science and Technology
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    • v.30 no.1
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    • pp.132-138
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    • 1998
  • This study was conducted to evaluate the storage stability of danmooji(salted radish) treated with high hydrostatic pressure $(300{\sim}686\;MPa)\;and\;heat\;(55^{\circ}C)$. Danmooji pressurized at 500 MPa and 686 MPa for 5 min showed $4{\sim}6log-cycle$ reductions in total microorganism, while danmooji heated at $55^{\circ}C\;for\;2\;hr\;showed\;3{\sim}5log-cycle$ reductions. However, danmooji pressurized at 300 MPa for 5 min showed a 2 log-cycle reduction, indicating that pressurization at lower than 300 MPa is insufficient for sterilization. After pressurized at 300 MPa, 500 MPa and 686 MPa for 5 min, pectinesterase (PE) activity of danmooji was increased by approximately 35%, 76% and 64%, respectively; and polygalacturonase (PG) activity of danmooji was increased by 109%. 163% and 120%, respectively. After heated at $55^{\circ}C$ for 2 hr, PE and PG activities of danmooji were increased by 18% and 200%, respectively. This indicates that PE in danmooji was more activated bypressure than heat, while PG was mostly activated by heat. Pressurized and heat-treated danmooji had higher hardness than control and maintained its hardness during storage at $30^{\circ}C$.

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The quality improvement of Bulgogi using superheated steam and high hydrostatic pressure (과열수증기와 고압 처리를 이용한 불고기의 품질개선)

  • Kim, Eunmi;Seo, Sanghee;Choi, Younsang;Chun, Kihong;Lee, Eunjung
    • Korean Journal of Food Preservation
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    • v.24 no.5
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    • pp.593-599
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    • 2017
  • The objective of this study was to investigate the effect of superheated steam (SHS) and high hydrostatic pressure (HHP) techniques on the improvement of the quality of Bulgogi product during manufacturing process. Bulgogi product was treated with four different cooking/treatment process: conventional cooking (CC), SHS cooking (SHS), CC and then HHP cooking (CC-HHP), and SHS and HHP cooking (SHS-HHP) samples. SHS treated product increased moisture content, and decreased crude protein. Additionally, hardness, gumminess and shear force values were significantly different among the samples (p<0.05). In safety experiment after 14 days of storage at refrigeration temperature indicated that the bacterial population was lower in the case of SHS-HHP as compared to CC-HHP. Changes in texture during the storage periods at $10^{\circ}C$ for SHS-HHP was lowest values with compared to the initial, while shear force values for both tended to decrease with increasing storage period. The TBA and VBN values for SHS-HHP increased to 0.48 ($5^{\circ}C$)-1.68 ($10^{\circ}C$) mg MD/kg and 25.14 ($5^{\circ}C$)-45.14 ($10^{\circ}C$) mg%, respectively after 15 days of storage. Overall, it was found that the combination of SHS and HHP reduced microbial growth, thus leading to improved product quality and sanitation.

Effect of a Combined Treatment of High Hydrostatic Pressure and Carbonation on the Quality Characteristics of Valencia Orange Juice (초고압과 Carbonation의 병합처리가 오렌지쥬스의 품질 특성에 미치는 영향)

  • Yun, Hye-Suk;Park, Seok-Jun;Park, Ji-Yong
    • Korean Journal of Food Science and Technology
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    • v.29 no.5
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    • pp.974-981
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    • 1997
  • A combined treatment of high hydrostatic pressure and carbonation was used to inactivate pectinesterase (PE) and sterilize microorganisms in Valencia orange juice without major changes in its nutritive components. Quality characteristics of Valencia orange juice, such as microorganisms, PE activity, vitamin C content and color, were evaluated after it was treated with pressure, carbonation-and-pressure, and heat. Quality changes during storage at $4^{\circ}C$ and $30^{\circ}C$ after the treatments were also investigated. Pressurized orange juice (pressurized at 600 MPa for 10 min at $20^{\circ}C$) showed 7.0% residual PE activity, while the carbonated-and-pressurized orange juice (207 $kPa-CO_2$ gas pressure, pressurized at 600 MPa for 10 min at $20^{\circ}C$) showed 0%. Pressurization at 400 MPa or higher decreased the population of microorganisms in the orange juice to less than 10 CFU/mL. Carbonated-and-pressurized orange juice showed slight decrease in vitamin C content when stored at both $4^{\circ}C\;and\;30^{\circ}C$. While heat-treated ($90^{\circ}C$ for 60 sec) orange juice showed 75% decrease in vitamin C content when stored at $30^{\circ}C$. L value (lightness) and b value (yellowness) of carbonated-and-pressurized orange juice were higher than those of heat-treated orange juice when they were stored at $4^{\circ}C$ for 30 days.

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Inactivation of Microorganisms and Enzymes in Foxtail Millet Takju by High Hydrostatic Pressure Treatment (초고압 처리에 의한 좁쌀탁주의 미생물 살균 및 효소 불활성화)

  • Jwa, Mi-Kyung;Lim, Sang-Bin;Mok, Chul-Kyoon;Park, Young-Seo
    • Korean Journal of Food Science and Technology
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    • v.33 no.2
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    • pp.226-230
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    • 2001
  • High hydrostatic pressure was applied to Foxtail Millet Takju to investigate the effects of high pressure on inactivation of microorganisms and enzymes. Total bacteria, lactic acid bacteria and yeast in untreated Takju were $6.8{\times}10^7,\;1.3{\times}10^8\;and\;8.4{\times}10^7\;CFU/mL$, respectively. Total bacterial count in Takju reduced to $2.2{\times}10^5\;CFU/mL$, while lactic acid bacteria and yeast were sterilized completely when heated at $65^{\circ}C$ for 30 min. Lactic acid bacteria and yeast decreased with the increase of treatment pressure, and pressurization of 400 MPa for 10 min at room temperature sterilized completely the lactic acid bacteria and yeast in Takju. Total bacteria were not sterilized with pressurization of even 600 MPa at room temperature. Total bacteria were completely sterilized at $66^{\circ}C/400\;MPa/60\;min\;and\;66^{\circ}C/600\;MPa/10\;min$. Pressurization of Takju caused a partial inactivation of ${\alpha}-amylase$, and after pressurization at 600 MPa for 10 min at room temperature, 73.2% of the original activity remained. The activity of glucoamylase increased with the increase of treatment pressure. Treatment at $66^{\circ}C/400\;MPa/10\;min$ reduced the activity of ${\alpha}-amylase$ by 59.7% and glucoamylase by 20.5%. ${\alpha}-Amylase$ was inactivated to less than 1.2% of the original activity at $66^{\circ}C/600\;MPa/30\;min$.

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Inactivation of Microorganisms and Enzymes in Foxtail Millet Yakju by High Hydrostatic Pressure Treatment (초고압 처리에 의한 좁쌀약주의 미생물 살균 및 효소 불활성화)

  • 좌미경;임상빈;목철균;박영서
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.32 no.8
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    • pp.1221-1226
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    • 2003
  • High hydrostatic Pressure was applied to Foxtail Millet Yakju to investigate the effects of high pressure on inactivation of microorganisms and enzymes. Total bacteria, lactic acid bacteria and yeast in untreated Yakju were $1.5{\times}$10$^4$,1.9${\times}$10$^4$ and 1.4${\times}$10$^4$ CFU/mL, respectively. Total bacterial count was reduced to 4.1${\times}$l0$^2$ CFU/mL, while lactic acid bacteria and yeast were sterilized completely in Yakju heated at $65^{\circ}C$ for 15 min. Lactic acid bacteria and yeast decreased greatly with the increase of treatment pressure, and were sterilized completely in Yakju treated at more than 300 ㎫ for 10 min/$25^{\circ}C$. Total bacteria were not completely sterilized with pressurization of even 600 ㎫ at room temperature and reduced to 2 log cycle even at $65^{\circ}C$. Total bacteria decreased by 2∼3 log cycle with the increase of treatment time from 10 to 60 min at $25^{\circ}C$/300 ㎫. Pressurization of Yakju caused a partial inactivation of $\alpha$ -amylase and glucosamylase, and the activities of $\alpha$ -amylase and glucoamylase decreased by 18.1% and 21.1%, respectively at $25^{\circ}C$/600 ㎫/10 min. Activities of $\alpha$ -amylase and glucoamylase decreased with the increase of temperature, and 22.2% and 32.1% of the original activity were remained with the treatment at $65^{\circ}C$/300 ㎫/10 min, respectively. Enzyme activities decreased slightly with the increase of treatment time at $65^{\circ}C$/300 ㎫.

Changes in Quality of Low Salt Fermented Anchovy by High Hydrostatic Pressure Treatment (초고압처리에 의한 저염 멸치젓의 품질 변화)

  • Lim, Sang-Bin;Yang, Moon-Sik;Kim, Soo-Hyun;Mok, Chul-Kyoon;Woo, Gun-Jo
    • Korean Journal of Food Science and Technology
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    • v.32 no.1
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    • pp.111-116
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    • 2000
  • Effects of ultra-high pressure treatment on viable cell count and quality characteristics of low salt fermented anchovy under different operating conditions such as pressure$(200{\sim}500\;MPa)$, temperature$(20{\sim}50^{\circ}C)$ and treatment time$(5{\sim}20\;min)$ were investigated. Viable cell count decreased gradually with the increase of pressure and suddenly at 400 MPa. It also decreased by seven folds at $50^{\circ}C$ and logarithmically with the increase of treatment time. Peroxide value increased with the increase of pressure, temperature and treatment time, and temperature played a major role. Thiobarbituric acid value was higher by two folds in samples treated than in the untreated regardless of any conditions investigated. Volatile basic nitrogen was almost the same in all samples except the one at $50^{\circ}C$. The sample treated at greater than $30^{\circ}C$ under high hydrostatic pressure indicated higher value in amino nitrogen. Treatment at $20^{\circ}C/300$ MPa/15 min showed greater reductions in viable cell counts, remaining better quality of low salt fermented anchovy.

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Changes in Allergenicity of Porcine Serum Albumin by Microwave, Sonication, and High Hydrostatic Pressure (Microwave, 초음파 및 초고압 처리에 의한 돼지 혈청 알부민의 항원성 변화)

  • Kim, Koth-Bong-Woo-Ri;Kim, Seo-Jin;Lee, So-Young;Song, Eu-Jin;Ahn, Dong-Hyun
    • Food Science of Animal Resources
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    • v.28 no.4
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    • pp.499-504
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    • 2008
  • Even though pork have frequently induecd allergic reactions in Korea, few papers have been published on pork allergy. This study was carried out to investigate the changes in allergenicity of porcine serum albumin (PSA) by microwave, sonication, and high hydrostatic pressure (HHP). The binding ability of p-IgG to PSA treated with microwave (1,5, or 10 min) directly decreased with increasing treatment time. Particularly, the binding ability of PSA treated 10 min was about 30%. Immunoblotting assay with p-IgG showed that band of PSA treated microwave directly disappeared at 5 and 10 min. However, the binding ability of PSA was not changed by the microwave treatment without heat. Also the reduction of allergenicity by sonication or HHP treatment was not found. In conclusion. allergenicity of PSA treated with microwave directly decreased with increasing time, therefore these results may be used for development of hypoallergenic pork.

Inhibitory Effect of High Hydrostatic Pressure Treatments on Histamine Production in Mackerel Scomber japonicus (초정수압 처리에 의한 고등어(Scomber japonicus)육 중의 히스타민 생성 억제 효과)

  • Kang, Bo-Kyeong;Kim, Koth-Bong-Woo-Ri;Kim, Min-Ji;Kim, Dong-Hyun;Jung, Seul-A;Bark, Si-Woo;Pak, Won-Min;Kim, Bo-Ram;Park, Hong-Min;Byun, Myung-Woo;Ahn, Dong-Hyun
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.46 no.6
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    • pp.733-738
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    • 2013
  • This study investigated the inhibitory effect of high hydrostatic pressure (HHP) treatments on histamine production in mackerel Scomber japonicus. Changes in viable cell counts, histamine contents, pH and VBN of mackerel fillet (stored at $4^{\circ}C$ for 25 days) were examined under HPP (200, 300, and 400 MPa). HPP treatments reduced viable cell counts by 2-3 log cycles during storage. Viable cells of mackerels treated with 400 MPa did not appear for 5 days. Histamine production was nearly suppressed by 300 and 400 MPa HPP treatments after 25 days. Furthermore, mackerels treated with HPP showed significantly lower VBN values compared with the control. Additionally, pH values were not affected by the treatments during storage periods. These results suggest that HPP treatment decreased histamine contents in mackerel muscles. Based on our results, HPP treatment may reduce scombroid fish poisoning by decreasing histamine production in mackerel during $4^{\circ}C$ storage.

Changes in Microbial and Physicochemical Properties of Single-Brewed Makgeolli by High Hydrostatic Pressure Treatment during Fermentation (단양주 방법으로 제조된 막걸리의 발효과정 중 초고압 처리에 의한 미생물적 및 이화학적 특성 변화)

  • Ha, Su-Jeong;Yang, Seung-Kuk;In, Ye-Won;Kim, Yun-Ji;Oh, Se-Wook
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.41 no.8
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    • pp.1176-1181
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    • 2012
  • This study was conducted to examine changes in the microbial and physicochemical properties of single-brewed Makgeolli in response to high hydrostatic pressure (HHP) treatment during various fermentation stages. HHP was applied in 2-day intervals at 400 MPa for 5 min during fermentation at $25^{\circ}C$. As a result, lactic acid bacteria showed 5~6 log reduction and reappeared at approximately 3~6 log cfu/mL as fermentation proceeded. Yeast also showed 5~6 log reduction but did not reappear during later fermentation period. HPP treatment did not result in any alcohol production on day 0 and 2. However, HPP treatment altered the pH and titratable acidity by reducing the number of microorganism. Reducing sugar contents of the samples increased continuously to 8.99% in 0 day treated sample and 5.01% in 2 day treated sample, whereas untreated Makgeolli contained 1.53% reducing sugars on 6 day due to alcohol conversion by yeast. Based on these results, HPP treatment during various fermentation stages altered the physicochemical properties of Makgeolli by changing the microbial community.