• Food Science of Animal Resources
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• v.23 no.3
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• pp.193-199
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• 2003

In order to investigate the meat tenderizing effects of pear, pineapple and kiwifruit, crude protease was prepared from each fruit and treated with actomyosin in a single manner or mixed type in several combination. Actomyosin was incubated with various proteases for 24 hrs under three different pH condition, and its degrading performance was evaluated by the SDS-PAGE. Pear extract showed an active degrading activity for actomyosin at pH 5.3 and 7.0. But, little actomyosin degradation was observed at pH 8.0. Actomyosin was strongly degraded by the treatment of protease from pineapple at all different pHs(5.3, 7.0 and 8.0). Kiwifruit protease extract has shown actomyosin degradation activity 1hr after treatment at pH 5.3 and pH 7.0. Meanwhile, the mixture of pear and pineapple extracts(l:l, w/w) showed much more degradation than the results of singular manner treatment at pH 5.3 and 7.0. When the pear protease was mixed with kiwifruit protease(l:l, w/w), the performance of actomyosin degradation was similar to the results of each single protease treatment. When the mixture was made of pineapple and kiwifruit extracts, actomyosin degradation was almost the same as the result of treatment of pineapple protease only. When those three proteases were mixed together(l:l:l, w/w/w), actomyosin degrading activities was in time dependent manner at pH 5.3. In summary, pear protease can be used potentially as a meat tenderizer when it was mixed with pineapple or kiwifruit rendering proper tenderization of the meat.

• 베이커리
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• no.10 s.375
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• pp.86-87
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• 1999

• Monthly Duck's Village
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• s.65
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• pp.90-91
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• 2008

평범한 것은 싫다! 작은 아이디어 하나로 사람들 발길 잡는 특별한 그릇이 있다는데~ 들어는 봤나? 맛있는 그릇, 이름하야 파인애플 오리 구이! 달콤한 파인애플이 오리 구이와 만나 찰떡궁합 그릇으로 탄생했다고... 독특하고 맛있는 이 그릇 덕분에 사장님 얼굴에 웃음꽃이 끊이질 않고 밥 먹을 시간도 없다는데~ 발상의 전환이 불러온 새로운 세계! 기막힌 아이디어로 연일 문전성시를 이루는 가게를 만나보자

• Journal of the Korean Society of Food Science and Nutrition
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• v.45 no.9
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• pp.1316-1323
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• 2016

The aim of this study was to evaluate proteolytic and antioxidant activities of fresh pineapple and kiwi juices extracted using a slow-speed masticating household juicer during low temperature storage. While over 90% of vitamin C and total polyphenols in both juices were retained after storage for 30 days at $-20^{\circ}C$, reduction of 56.8% for vitamin C and 31.9% for total polyphenols in pineapple juice were detected after storage at $4^{\circ}C$. In the case of kiwi juice, 32.9% of vitamin C and 22.4% of total polyphenols were lost. A high initial content of vitamin C in kiwi juice resulted in a slower reduction rate than that for pineapple juice. A similar result was obtained for 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity. Proteolytic activities of both juices were maintained efficiently with less than 10% loss during storage for 30 days at $-20^{\circ}C$. Protease stability of pineapple juice was better than that of kiwi juice during storage at $4^{\circ}C$, and the same result was obtained when boiled chicken breast was used as a substrate. From these results, when storing pineapple and kiwi juices, which are widely used as a natural meat tenderizer and digestive aid, cold storage at $-20^{\circ}C$ seemed to be more suitable for maintaining antioxidant and proteolytic activities than cold storage at $4^{\circ}C$.

• Journal of Animal Environmental Science
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• v.10 no.2
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• pp.119-126
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• 2004

The protein in the extracts from the skins of pineapple and kiwi and the optimal conditions to hydrolyze blood, egg and gluten meals with them were investigated. Protein analysis by SDS-polyacylamide gel electrophoresis showed one protein band with 22 kd molecular weight in the pineapple skin extract, and Hve protein bands with 27 kd, 22.5 kd, 22 kd, 19 kd, and 14.4 kd molecular weight in the kiwi skin extract. The 22 kd protein in the pineapple skin extract is assumed to be bromelain, and the 27 kd protein in the kiwi skin extract is assumed to be actinidin, both are pretense. The optimal conditions for hydrolysis of blood, egg, and gluten meals we: 6-24 hours in time, $60^{\circ}C$ in temperature, and pH 4-pH 7.

• Journal of the Korean Society of Food Science and Nutrition
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• v.43 no.8
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• pp.1283-1288
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• 2014

Pineapple flesh and core were added during fermentation to develop a new style of fruit makgeolli. Physicochemical characteristics were measured during fermentation, and sensory evaluation was performed after fermentation to estimate the quality of pineapple makgeolli. No significant differences were observed for pH, $^{\circ}Bx$, and alcohol contents between makgeolli with and without pineapple after fermentation. Total acidity of the pineapple makgeolli increased due to considerable elevation of citric acid, tartaric acid, malic acid, and pyroglutamic acid contents as well as slight elevation of lactic acid and propionic acid contents. On the other hand, the total amino acid contents of pineapple makgeolli were lower than those of control. The sensory preferences for pineapple makgeolli were higher overall than those for control, which can be attributed to the preferences for fruit flavor and sour taste in pineapple makgeolli.

• Korean journal of food and cookery science
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• v.26 no.3
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• pp.323-329
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• 2010

Studies on the tenderizing effect of fruits has been limited even though fig, kiwifruit, pear, and pineapple cultivated in Korea are utilized commonly during cooking for their proteolytic properties. Therefore, the characteristics of these fruits were investigated by treating beef with their crude protease extracts. The protease effects of crude protease extract from the fruits on casein and myofibrilar protein were in the following order : pineapple > kiwifruit > fig > pear. Electrophoretic analysis results found that pineapple, kiwifruit, and fig cleaved myosin heavy chain into smaller fragments. The myofibrilar fragmentation ratio of crude protease extracts was the highest for pineapple whileas the lowest for pear. Ground fruits (5% and 10%) increased amounts of soluble nitrogen and decreased shear force of beef. Pineapple was the most effective while pear was the least effective. Decrease in springiness and gumminess was observed by texture profile analysis of beef treated with fruits, especially pineapple and kiwifruit. Among the 5% treatments, pineapple and kiwifruit produced the highest tenderness. Additionally, 10% treatment was less preferable than the 5% treatment.

• 베이커리
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• no.10 s.339
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• pp.144-145
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• 1996

• 베이커리
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• no.4 s.381
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• pp.92-93
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• 2000

• 베이커리
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• no.7 s.336
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• pp.150-151
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• 1996