김치 가공 부산물의 재조명과 활용 방안

천호현 한국식품저장유통학회 2022 식품저장과 가공산업 Vol.21 No.2

Dehydration of Blueberries Using Maltodextrin and the Physicochemical Properties of Dried Blueberries

천호현,김민성,정경숙,송경빈 한국원예학회 2012 Horticulture, Environment, and Biotechnology Vol.53 No.6

Frozen blueberries were dehydrated after treatment with 20, 50, and 80% maltodextrin (MD), and the dried samples were compared with hot-air-dried and freeze-dried samples in terms of the microbial contamination, total anthocyanin content, color, texture, and sensory evaluation. The dried blueberries showed significant reductions in the populations of preexisting total aerobic bacteria. The MD-treated samples had lower contents of total anthocyanins than the freeze-dried samples, but the exudate containing anthocyanins released from the MD-treated samples can be used as a natural additive. The MD-treated samples received a better sensory evaluation than the freeze-dried or hot-air-dried samples. These results suggest that dehydration of blueberries using MD is a very efficient method compared with other methods because of enhanced palatability, good color, and preferable texture.

Effects of Aqueous Chlorine Dioxide Treatment and Cold Storage on Microbial Growth and Quality of Blueberries

천호현,송경빈,강지훈 한국응용생명화학회 2013 Applied Biological Chemistry (Appl Biol Chem) Vol.56 No.3

The effects of postharvest washing treatment and cold storage on the quality of blueberries were examined. The blueberries were treated with water or 100 ppm aqueous chlorine dioxide (ClO2) and stored at 4 or 20oC for 12 days. The aqueous ClO2treatment reduced the initial populations of total aerobic bacteria and yeast and mold in the blueberries by 1.4–1.5 and 0.8–0.9 log CFU/g, respectively, compared with the control. Total anthocyanin content indicated that the blueberries stored at 4oC maintained their total anthocyanin content better than those stored at 20oC. Regardless of washing treatment, the blueberries stored at 4oC exhibited lower decay and weight loss than those stored at 20oC. These results suggest that a postharvest treatment of aqueous ClO2and cold storage can be useful for maintaining the quality of blueberries during storage.

Controlled atmosphere 저장 시스템을 이용한 기체조성 변화가 조생 ‘후지’ 사과의 저장 중 품질 및 내부장해 발생에 미치는 영향

천호현,박석호,최동수,최승렬,김진세,이진수 한국식품저장유통학회 2016 한국식품저장유통학회지 Vol.23 No.1

This study was conducted to investigate the change in the quality of early season Fuji apples that were subjected to eight different storage conditions using the developed controlled atmosphere (CA) storage system. Early season Fuji apples grown at Mungyeong, in the South Korea, were harvested in September 2014 for storage studies. Flesh firmness, titratable acidity, total soluble solid content, weight loss, and internal browning disorder were used as quality indicators for the stored apples. Flesh firmness and weight loss were better than that of the control after 70 days of storage. However, there was no significant difference in the titratable acidity or total soluble solid content among the apple samples from eight chambers after storage. The internal browning disorder of apple samples in CA chambers occurred when exposed to 1% CO2+2% O2 and 1% CO2+0.5% O2, resulting in a higher incidence rate of 2 and 8% after 70 days of storage than that in the control. In addition, the CA storage conditions at 3, 4 and 5% CO2+2% O2 increased the rate of internal browning disorder by 26%. Therefore, CA storage can be used to maintain the quality of the apple if the optimal gas concentrations in the CA are applied to the storage strategy.

팰릿 단위 기체환경 제어 저장한 배추의 품질 변화와 품질 예측 모델

천호현,최은지,이정현,손재용,박천완 한국산업식품공학회 2020 산업 식품공학 Vol.24 No.3

This study was conducted to investigate the quality of kimchi cabbages stored under a pallet unit-controlled atmosphere (PUCA), containing 2% O2 and 5% CO2, and to develop quality prediction models for cabbages stored under such conditions. Summer and winter cabbage samples were divided into PUCA-exposed groups and atmospheric airexposed control groups (in a cold storage). The control summer cabbages lost up to 8.31% of their weight, whereas the PUCA-exposed summer cabbages lost only 1.23% of their weight. Additionally, PUCA storage effectively delayed the reduction in cabbage moisture content compared with the control storage. After storage for 60 and 120 days of the summer and winter samples, respectively, the reducing sugar contents were higher in the PUCA groups than in the control groups. The linear regression analysis-derived equations for predicting the storage period, weight loss, and moisture content in the control groups, as well as those for predicting the storage period and weight loss in the PUCA groups, were appropriate according to the adjusted coefficient of determination, root mean square error, accuracy factor, and bias factor values. Therefore, this PUCA system would be useful for improving the shelf life of the postharvest summer and winter cabbages used in the commercial kimchi industry.

적양배추싹의 Shelf Life 예측 및 Aqueous ClO₂, Fumaric Acid, UV-C 병합처리

천호현(Ho Hyun Chun),박승종(Seung Jong Park),정승훈(Seung Hun Jung),송경빈(Kyung Bin Song) 한국식품영양과학회 2013 한국식품영양과학회지 Vol.42 No.9

적양배추싹의 저장온도에 따른 미생물학적 유통기한을 예측하기 위해서, 적양배추싹을 polyolefin film과 PA/PA/PE film에 각각 포장 후 4와 10°C에 저장하여 저장기간 중 총호기성균 수를 측정하였다. 측정된 data를 Gompertz"s model 식을 이용하여 최대성장속도와 유도기를 구하였고, shelf life 예측모델 식으로부터 계산된 적양배추싹의 shelf life는 polyolefin film과 PA/PA/PE film에 포장 후 10°C에 저장된 시료가 각각 19.7과 22.6시간인 반면, 4°C에 저장된 시료는 49.4와 52.3시간으로 나타났다. 성장예측모델 식의 적합성 평가를 위해 Af, Bf, MSE 값을 산출한 결과, 예측모델 식의 적합성이 뛰어났다. 한편, aqueous ClO₂/fumaric acid와 UV-C 병합처리 된 적양배추싹 시료의 shlef life는 7일 이상으로 예측되었다. 따라서 aqueous ClO₂/fumaric acid와 UV-C 병합처리 후 저온저장은 적양배추싹의 shelf life 연장에 효과적인 것으로 판단된다. To estimate the shelf life of red cabbage sprouts (stored at 4 and 10°C), the numbers of total aerobic bacteria were determined during storage. Parameters for the Gompertz model were determined and the shelf life was predicted using a modified Gompertz equation. The estimated shelf lives of red cabbage sprouts packed with polyolefin film and polyamide/polyamide/polyethylene (PA/PA/PE) film at 4°C were 49.4 and 52.3 h, respectively, whereas those of red cabbage sprouts packed with polyolefin film and PA/PA/PE film at 10°C were 19.7 and 22.6, respectively. The shelf life prediction equation was appropriate, based on the statistical analysis of the accuracy factor, bias factor, and mean square error. On the other hand, for red cabbage sprouts treated with aqueous ClO₂/fumaric acid and UV-C then packed with polyolefin film or PA/PA/PE film, the shelf life was predicted to be longer than 168 h. These results suggest that the combined treatment of aqueous ClO₂/fumaric acid and UV-C can be useful for improving microbial safety and extending the shelf life of red cabbage sprouts during storage.

한우육의 냉동 및 해동 조건에 따른 품질 변화

천호현(Ho Hyun Chun),최은지(Eun Ji Choi),한애리(Ae Ri Han),정영배(Young Bae Chung),김진세(Jin Se Kim),박석호(Suk Ho Park) 한국식품영양과학회 2016 한국식품영양과학회지 Vol.45 No.2

본 연구는 공기를 이용한 송풍식과 초저온 에탄올을 이용한 침지식 냉동방법 및 저온 송풍식과 유수식 해동방법을 조합하고 저장 중 냉동-해동 반복에 따른 한우 설도의 품질에 미치는 영향을 살펴보았다. 송풍식 냉동은 냉동이 완료되는데 약 800분이 소요됐지만 침지식 냉동방법은 8분에 한우 시료를 급속하게 동결시켰다. 한편 송풍식 해동은 한우 시료가 해동이 완료되는 데 약 350분 소요되었지만, 유수식 해동은 약 70분으로 해동시간이 280분 단축되었다. 송풍식 냉동시료는 송풍식 해동과 유수식 해동에 의해 4.05와 4.54%의 드립 감량이 발생했지만 침지식 냉동시료는 송풍식 해동과 유수식 해동에 의한 드립 감량이 2.59와 2.09%로 냉동방법에 따라 유의적(P<0.05) 차이를 보였다. 냉동과 해동 처리로 한우 설도의 보수력은 64.40~66.05%로 감소하였지만 냉동과 해동 조건에 따른 차이가 거의 나타나지 않았다. 송풍식 냉동-송풍식 해동과 침지식 냉동-송풍식 해동 처리구의 TBARS 값은 각각 1.12와 1.18 mg MDA/kg으로 송풍식냉동-유수식 해동 처리구와 침지식 냉동-유수식 해동 처리구의 0.82와 0.77 mg MDA/kg과 비교하여 높은 값을 나타냈다. 휘발성 염기질소 함량은 TBARS 결과와 유사하게 송풍식 해동 처리구가 유수식 해동 처리구보다 높은 값을 보였다. 냉동과 해동이 조합된 모든 처리구의 총 호기성 세균수는 4.45~4.67 log CFU/g으로 냉동 및 해동 방법에 따라 유의적(P<0.05) 차이는 나타나지 않았다. 송풍식 냉동된 한우육은 해동 후 근섬유 조직이 불균일하게 찢어지거나 근섬유 간의 간격이 더 넓어졌지만, 침지식 냉동된 한우육은 송풍식 해동 또는 유수식 해동 후 조직의 구조적 손상이나 변화가 훨씬 적은 것으로 나타났다. 한편 저장 중 냉동-해동의 3반복 처리로 드립 감량 증가, 보수력 감소, TBARS 값 및 휘발성 염기질소 함량 증가, 근섬유 조직 손상 등 품질 저하가 발생하였다. 앞으로 고품질 냉동 한우육의 생산 및 유통을 위한 부위별, 포장단위별 중량에 따른 냉동 및 해동 방법에 따른 이화학적 품질에 미치는 영향, 관능평가 등의 추가 연구가 필요할 것으로 사료된다. This study examined the effects of freezing and thawing conditions on quality of Hanwoo bottom round. The beef samples were frozen by air blast freezing at -20°C or ethanol immersion freezing at -70°C and then stored at -20°C for 10 days. After 10 days of storage, the frozen samples were thawed with air blast thawing at 4°C or water immersion thawing at 4°C and subjected to subsequent analyses of drip loss, water holding capacity, thiobarbituric acid reactive substance (TBARS), volatile basic nitrogen (VBN), total aerobic bacteria, and microstructure. Drip loss significantly increased in samples treated with air blast freezing compared to ethanol immersion freezing, whereas freezing and thawing processes had no significant impact on water holding capacity of the samples. Thawing conditions had a much stronger influence on the TBARS and VBN of the samples than freezing conditions. There was no significant difference in the population of total aerobic bacteria among the four samples subjected to one freeze-thaw cycle. In addition, to analyze the effects of freeze-thaw cycle on the quality of beef, three freeze-thaw cycles were performed during storage. Multiple freeze-thaw cycles increased drip loss, TBARS, and VBN and decreased water holding capacity, accelerating microstructural damage. These data indicate that Hanwoo bottom round can be rapidly frozen and thawed by using ethanol immersion freezing and water immersion thawing methods with minimal impact on meat quality.

수확 후 블루베리의 미생물학적 품질향상을 위한 세척시스템 개발

천호현(Ho Hyun Chun),박석호(Seok Ho Park),최승렬(Seung Ryul Choi),송경빈(Kyung Bin Song),박승종(Seung Jong Park),이선호(Sun Ho Lee) 한국식품영양과학회 2013 한국식품영양과학회지 Vol.42 No.11

본 연구는 블루베리의 미생물학적 안전성 확보 및 상품성 향상을 위해서 버블-이산화염소수 세척시스템을 개발 및 적용하여 저장 중 블루베리의 품질변화를 분석하였다. 버블-이산화염소수 세척시스템으로 처리된 블루베리는 대조구와 비교하여 총 호기성 세균과 효모 및 곰팡이 수가 1.0 log CFU/g 이상 감소하였다. 그리고 저장기간 동안 버블-이산화염소수 세척에 의한 미생물 감균효과는 일정하게 유지함을 보였다. 한편 Hunter L, a, b 값 및 중량 감소율의 결과에 있어서 대조구, 버블-물 세척구, 버블-이산화염소수 세척구간에 유의적인 차이는 나타나지 않았다. 따라서 농가에서 쉽게 활용할 수 있도록 개발한 버블-이산화염소수 세척시스템은 블루베리의 미생물학적 안전성 향상 및 고품질 유지에 효과적인 것으로 판단되며 오미자 등 다른 기능성 소과류에도 활용 가능할 것으로 기대된다. To inactivate the microorganisms on the surface of blueberries after harvest and to secure microbial safety, a bubble-aqueous chlorine dioxide washing system was developed. After treating the freshly prepared blueberries with the bubble-aqueous chlorine dioxide washing system, the changes in the microbial populations and quality of the blueberries were determined during storage 4±1°C. Microbiological data indicated that the populations of total aerobic bacteria, yeast and mold decreased by 1.4 and 1.3 log CFU/g at the treatment of 20 ppm aqueous chlorine dioxide with the system, respectively. There was no significant difference in color change and weight loss during storage among treatments. In addition, this washing system could handle approximately 60 kg of blueberry per hour, resulting in labor-saving. Therefore, these results clearly suggest that the bubble-aqueous chlorine dioxide washing system could be useful in improving the microbiological safety of fresh blueberries after harvest.

사격통제장치의 개요

현천호,Hyeon, Cheon-Ho 한국방위산업진흥회 1982 國防과 技術 Vol.- No.38

UV-C 조사가 고춧가루의 저장 중 품질에 미치는 영향

천호현(Ho Hyun Chun),김주연(Ju Yeon Kim),김현진(Hyun Jin Kim),송경빈(Kyung Bin Song) 한국식품저장유통학회 2009 한국식품저장유통학회지 Vol.16 No.3