• 대한영양사협회학술지
• /
• 제15권1호
• /
• pp.69-76
• /
• 2009

To determine the salinity of packaged Kimchi, bulk Kimchi and other common foods, we collected samples of foods from the Gyeonggi province area in October 2006 and determined the salinity levels in one serving portion. The average salinity of all foods was 0.226${\pm}$0.212%. The average salinity of all Kimchi samples was 0.401${\pm}$0.260. The average salinities of soups, stews, protein containing side dishes, vegetable side dishes and drinks were 0.153${\pm}$0.085%, 0.691${\pm}$0.213%, 0.151${\pm}$0.102%, 0.209${\pm}$0.121% and 0.080${\pm}$0.016%, respectively. The average salt intake of one serving of Kimchi was 0.125${\pm}$0.041 g, while the average salt intakes of one serving of the soups, stews, protein containing side dishes, vegetable side dishes and drinks were 0.306${\pm}$0.170 g, 1.382${\pm}$0.426 g, 0.094${\pm}$0.061 g, 0.146${\pm}$0.089 g, and 0.159${\pm}$0.152 g, respectively. The salinity of packaged Kimchi was significantly higher than the salinity of the bulk Kimchi (p < 0.01). In addition, the salinity of the liquid and solid stem portions of the packaged Kimchi was significantly higher than the salinity of the same sized portions of the bulk Kimehi (p<0.01). Furthermore, the salinity in the liquid and solid stern portions of the packaged mustard leaf Kimchi were significantly higher than the salinities of other types of Kimchi (p < 0.0001). The salinity of all Kimchi is higher than that of soup, protein containing side dishes, vegetable side dishes or drinks, but the salt content of one serving of Kimchi is lower than those of the soups or stews or vegetable side dishes or drinks (because one serving size of Kimchi is usually smaller than that of the other foods).

• 한국식품과학회지
• /
• 제26권1호
• /
• pp.62-67
• /
• 1994

김치를 Ny/PE, Ny/CPP(PP tray+Ny/CPP cover), Cryovac BK-1, BK-4, PET/Al/PE film으로 포장하여 $5^{\circ}C$ (97%RH), $20^{\circ}C$ (76%RH)에서 저장 중 품질변화를 살펴보았다. 김치의 품질을 평가하기 위하여 포장내 가스조성, pH, 산도, 색도, 젖산균 수, 기호도를 기간별로 측정하였다. 포장내 가스조성은 PET/Al/PE film 포장김치가 저장초기에 산소농도가 높았고, 저장말기에 이산화탄소농도가 거의 100% 수준에 달하였다. Cryovac BK-1, BK-4로 포장된 김치는 발효가 진행되면서 이산화탄소농도가 증가하다가 가스투과성에 의한 이산화탄소의 방출과 외부공기의 유입으로 산소농도는 증가하고 이산화탄소농도는 감소하는 형태를 보였으며 저장말기까지 Ny/PE, Ny/CPP, PET/Al/PE와는 달리 포장의 팽배화 현상은 나타나지 않았다. pH 변화는 포장재질에 따른 차이가 크지 않았으나 Cryovac BK-1, BK-4가 저장중 다른 포장재질에 비하여 약간 낮은 pH를 나타냈으며, 산도는 약간 높았다. 저장중 김치의 색도변화가 포장재질에 따라 달랐으며, 포장재질별 젖산균수, 기호도 변화는 저장온도 모두에서 유의적인 차이가 없는것으로 나타났다. 이상의 결과를 종합하여 본 실험에 사용한 포장재질이 김치의 품질에 미치는 영향은 크게 다르지 않다고 여겨졌고, 저장 및 유통시 문제점인 팽배화현상을 방지하기 위해서는 현재 업체에서 사용하는 기체차단성이 높은 포장재보다는 상대적으로 이산화탄소의 투과도가 높은 포장재의 사용이 바람직하다고 사료된다.

• 한국식품저장유통학회지
• /
• 제7권2호
• /
• pp.218-221
• /
• 2000

The effect of the amounts of kimchi (100, 200 and 300 g) and fermentation temperature (10, 15 and 20$^{\circ}C$) on gas formation of kimchi during fermentation were investigated. The pH of the 200 g packaged kimchi for 12 days at 10-15$^{\circ}C$ was higher than 100 g and 300 g packaged kimchi, whereas that of 100 g packaged kimchi at 20$^{\circ}C$ was higher than the other products. Total lactic acid bacteria in was highest in the 200-300 g packaged kimchi fermented for 12 days at 10$^{\circ}C$. Number of Leuconostoc mesenteroides and Lactobacillus plantarum of 200 g packaged kimchi higher with the lower fermentation temperature, and that of Lactobacillus plantarum was higher in the kimchi fermented at 15$^{\circ}C$. The periods of gas formation was 8-11 days of fermentation at 10$^{\circ}C$, 1-7 day at 15$^{\circ}C$, and 5-6 days at 20$^{\circ}C$, respectively. The order of gas formation amount in the temperature and amount of kimchi was 15 > 20 > 10$^{\circ}C$ and 300 > 200 > 100 g, respectively.

• 한국식품저장유통학회지
• /
• 제10권2호
• /
• pp.136-141
• /
• 2003

포장김치의 표면처리가 김치의 pH, 산도, 총균수, 젖산균수, 표면갈변도 및 이미, 이취발생에 미치는 영향을 조사하였다. 표면처리는 포장김치표면에 70% 에탄올을 1회 분무한것과 김치표면에 PE-film(두께 0.04mm)을 부착한 것으로 나누어 행하였으며, 1$0^{\circ}C$에서 저장하였다. 무처리와 에탄올을 분무한 경우는 저장 15째에 pH가 4.0수준에 도달하였으나 PE-film을 처리한 경우는 21일째까지도 pH가 4.0 이상을 유지하였다. 산도의 경우도 pH와 동일한 경향을 나타내어 PE-film을 처리함으로서 김치의 숙성이 지연되었다. PE-film처리군의 총균수는 무처리와 에탄을 처리군에 비하여 현저하게 낮았으나 젖산균수는 오히려 높았다. 무처리와 에탄올 처리구간의 차이는 거의 없었다. 주사형 전자현미경으로 김치의 표피조직을 관찰한 결과 무처리와 에탄을 처리군은 배추 세포조직의 형태가 거의 파괴되었으나 PE- film 처리군은 세포형태가 안정되게 유지되었다. 무처리와 에탄을 처리군은 저장 12일째부터 표면갈변과 이미이취가 발생하였으나 PE-film 처리군은 저장 21일째까지도 나타나지 않았다.

• 한국포장학회지
• /
• 제27권1호
• /
• pp.35-40
• /
• 2021

Calcium hydroxide (CH) reacts with CO2 to produce moisture, and sodium carbonate (SC) reacts with CO2 in the presence of moisture. Using these different characteristics of these two reactants, a CH/SC mixture of CO2 absorber tuned for kimchi ripening to produce CO2 in a flexible package was selected. A ratio of CH:SC (1:2) in highly gas permeable microporous spunbonded film (Tyvek) sachet was found to be appropriate for delayed and consistent CO2 absorption useful for kimchi package. Addition of superabsorbent polymer (SAP) as moisture buffer was helpful for boosting the consistency of CO2 absorption. In a package of 0.5 kg kimchi at 10℃, the sachet consisting of 0.794 g of CH + 2.276 g of SC + 0.4 g of SAP suppressed its volume expansion and maintained a suitable range of CO2 partial pressure (PCO2) steadily inside. These optimal conditions may vary depending on the type and salinity of kimchi, storage and distribution temperature, and the material and area of the absorber sachet. This study showed a potential of mixture CO2 absorber to be tuned for CO2 producing packaged kimchi for the purpose of keeping consistent PCO2 at tolerable volume expansion.

• 한국식품조리과학회지
• /
• 제18권5호
• /
• pp.522-528
• /
• 2002

The effects of packaging materials, Ny/PE, PET/PE/Al, PET/PE/LDPE/CPP, and PET/Al/Ny/CPP, and packaging methods, atmospheric and vacuum packaging on physicochemical properties of onion Kimchi and rosemary-onion Kimchi were investigated. The maximun swelling days of packaging materials were increased more in rosemary-onion Kimchi than in onion kimchi, and they were in the order of PET/Al/Ny/CPP, PET/PE/Al, PET/PE/LDPE/CPP, and Ny/PE. The pH and reducing sugar contents of onion Kimchi and rosemary-onion Kimchi were decreased during storage. and those of lion Kimchi and rosemary-onion Kimchi packaged in PET/Al/Ny/CPP were higher than those in different packaging materials. Titratible acidity and vitamin C content of rosemary-onion Kimchi were lower than those of onion Kimchi, but there were no differences in the L and b values between two groups.

• 한국식품과학회지
• /
• 제28권1호
• /
• pp.190-196
• /
• 1996

고차단성 포장재를 이용하여 김치를 각기 다르게 진공포장한 후 $10^{\circ}C$와 $0^{\circ}C$의 저온조건에 저장하면서 진공도 차이에 따른 pH, 산도, 색상, 젖산균수 등의 변화를 측정하고 관능검사를 병행하여 진공포장이 김치 품질에 미치는 영향을 살펴보았다. 전체적으로 진공도 차이는 저장중 김치의 pH와 적정 산도, 색상, Leuconostoc과 Lactobacilli를 포함한 젖산균수, 관능검사 결과 등에 거의 영향을 미치지 않았다. 이로부터 저온 유통되는 소포장 김치의 품질보존을 위해서는 고도의 진공포장이 아닌 포장재 내부의 head space를 제거하는 수준으로도 충분히 효과적임을 확인할 수 있었다.

• 대한가정학회지
• /
• 제25권4호
• /
• pp.57-62
• /
• 1987

To obtain basic data for the decvelopment of Kimchi preservation method, optimal ripening Kimchi was air-packaged with polyethylene bag, and followed by the microbiological, firmness and sensory evaluations during storage at 5$^{\circ}C$. 1. Total aerobic count increased in the beginning of storage and then decreased slowly as the number of total Lactic bacteria(anaerobe) in creased. 2. Textural parameters were remarkably changed according to the elapse of storage period. 3. Sensory evaluation showed that the score was decreased considerably 10 days after storage.

• Journal of Microbiology and Biotechnology
• /
• 제19권1호
• /
• pp.78-82
• /
• 2009

Eight commercially packaged kimchi products were examined over 15 days of storage at $4^{\circ}C$ to evaluate the occurrence of Hafnia alvei (H. alvei). Additionally, 7 saeujeot products, as a possible ingredient source, were analyzed to examine the bacteria's origin. Over the storage period, kimchi samples had decreasing pH levels, which stabilized at pH 4.2; acidity increased to $0.9{\pm}0.1%$. Lactose-nonfermenting bacteria, which H. alvei belongs to, gradually reduced in numbers over the kimchi storage. However, the relative frequency of H. alvei to lactose-nonfermenting bacteria tended to increase. From the kimchi samples, 58 H. alvei-presumptive colonies were selected. Forty three colonies turned out to be H. alvei and 15 colonies were identified as other strains or uncertain identifications when the API 20E system was used. From further test, 3 of the 43 colonies were H. alvei (-) against the phage test. Finally, H. alvei was isolated from saeujeot, indicating that this ingredient can be an originating source of H. alvei in kimchi.

• 한국포장학회지
• /
• 제26권1호
• /
• pp.1-9
• /
• 2020

We evaluated the applicability of baking soda, charco'al, coffee, and green tea as a natural deodorant in Kimchi packaging. Moreover, to evaluate the potential usage of these deodorants in packaging materials and confirm their applicability in high-temperature melt-extrusion processing, the thermal stabilities of the deodorants were investigated, and heat-treated deodorants were evaluated in terms of the deodorizing function compared with non-treated deodorants. Aroma patterns were decreased after deodorizing treatment with all-natural deodorants. Dimethyl disulfide, methyl trisulfide, and diallyl disulfide, the most significant odorous Volatile organic compounds (VOCs) of Kimchi, decreased after treatment with the deodorants. In particular, baking soda and charcoal showed the highest efficiency in removing odorous compounds and VOCs from Kimchi, even after high-temperature processing. The acetic acid removal rates for both baking soda and charcoal were 99.9±0.0%. The heating process increases the deodorizing effects of baking soda. Sensory evaluation results showed that there is a significant increase (p < 0.05) in the overall preference for Kimchi samples packaged with charcoal and baking soda. This study provides useful information for the deodorization effects of natural deodorants for Kimchi smell and their applicability for packaging materials.