• Title/Summary/Keyword: 저장건조

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특집 (2) - 나물콩의 수확 및 저장기술

  • Park, Geum-Ryong
    • 물만먹고자라요
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    • no.21
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    • pp.41-43
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    • 2008
  • 콩나물의 원료로 이용되는 나물콩은 종자의 활성과 품질이 매우 중요하다. 수확시기, 탈곡, 건조과정 및 저장방법 등에 따라서 종자의 품질과 발아력에 큰 차이가 있다.

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Changes of Free Radical Concentration with Irradiation Dose and Storage Time in Gamma-Irradiated Dried Vegetables (감마선 조사된 건조채소류에서 조사선량과 저장기간에 따른 Free Radical 농도의 변화)

  • 남혜선;양재승
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.30 no.5
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    • pp.854-857
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    • 2001
  • Electron spin resonance (ESR) spectroscopy was used to detect free radicals in irradiated dried vegetables. Dried carrot, mushroom and green onion were irradiated with doses of 0, 1, 3, 5 and 7 kGy at room temperature using a Co-60 irradiator. Free radicals were detected in irradiated dried carrot, green onion and mushroom, while those were not detected in non-irradiated samples. Since concentration of free radicals linearly increased with applied doses (1~7 kGy), highly positive correlation coefficients ($R^2$=0.9747~0.9919) were obtained between irradiation doses and free radical concentrations right after irradiation. Although concentration of free radicals slowly decreased with storage time, the characteristic ESR signals of free radicals slowly decreased with storage time, the characteristic ESR signals of free radical in irradiated samples were observed even after 3 months of storage at room temperature.

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냉동건조를 이용한 쌀기본 이유식 제조에 있어서 건조조건의 최적화

  • 김광옥;최호정
    • Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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    • 2003.10a
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    • pp.214.1-214
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    • 2003
  • 본 연구는 4~6개월의 유아들을 위하여 재수화시킨 후 숟가락으로 떠먹일 수 있도록 쌀을 기본으로 하고 당근, 쇠고기 및 계란을 각각 주재료로 한 냉동건조 이유식 제조의 최적조건을 결정하기 위하여 수행되었다. 본 연구에서 얻어진 결과를 요약하면 다음과 같다. 당근, 쇠고기 및 계란이유식에서 모두 냉동건조시간은 수분함량이 높고 가열판 온도가 낮을수록 증가하였다. 파쇄성은 수분함량이 감소하고 가열판온도가 증가함에 따라 증가하였다. 관능적 특성 중 수화속도, 균질성 및 매끄러운 정도는 수분함량이 증가하고 가열판 온도가 감소할수록 증가였고, 뜨기 쉬운 정도는 수분함량이 증가할수록 증가하였으나, 가열판온도의 영향은 거의 받지 않았다. 또한 피막형성성은 수분함량과 가열판온도가 증가할수록 증가하였다. 이유식 제조치 최적조건은 당근이유식의 경우 수분함량 88.5%와 가열한 온도 34$^{\circ}C$로, 쇠고기이유식에서는 수된함량 88.5% 와 가열판온도 28$^{\circ}C$로, 그리고 계란이유식에서는 수분함량 87.5%와 가열판 온도 39$^{\circ}C$로 결정되었다.

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Effect of Cooking on Moisture Sorption Properties of Corn (삶은 옥수수의 수분흡습성질)

  • Mario, Carranza;Kim, Sung-Kon
    • Korean Journal of Food Science and Technology
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    • v.22 no.5
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    • pp.530-532
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    • 1990
  • The moisture sorption behaviors of dry corn(DC). dry-corn (DCC) and soaked-rooked corn(SCC) at $25^{\circ}C$ were analyzed. The corn was soaked in water at $26^{\circ}C$ for 8hr. The cooking times for DCC and SCC were 30 and 20min. respectively, at $80^{\circ}C$. Desorption occurred for DC and DCC at RH below 23% and SCC at RH below 33% during storage. Moldiness was observed in all samples at RH 97%, after 192hr for DC and 288 hr for both DCC and SCC. At the same water activity. SCC sample had the highest moisture content, followed by DC. The SCC sample had the highest monolaver value and sorption heat. Stability isotherms indicated that DC and SCC had better storability than DCC.

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Encapsulation of Avocado Oil Using Spray Drying (분무건조를 이용한 아보카도 오일의 캡슐화)

  • Bae, Eun-Kyung;Kim, Gun-Hee
    • Korean Journal of Food Science and Technology
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    • v.40 no.3
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    • pp.303-310
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    • 2008
  • This study was performed to verify the effects of encapsulation against oil oxidation. Thiobarbituric acid (TBA) values of samples were compared during storage at $60^{\circ}C$, indicating that the encapsulated avocado oil had lower TBA values than the free avocado oil. Microcapsules consisting of a whey protein isolate (WPI)-only wall system had slightly improved oxidative stability; however, spray-dried particles containing a high proportion of maltodextrin (MD) clearly offered better protection from oxidation than the other forms of encapsulation. The chlorophyll (Chl) content of the encapsulated avocado oil was higher than that of the free oil sample. When compared to the control, all wall systems protected the change of the chlorophyll content storage. No large differences were observed between the encapsulated powders according to the various wall materials. The color of the encapsulated oil changed from green to yellowish-green, indicating the formation of pheophytin from chlorophyll. The yellowish color of the oil correlated with a reduced total Chl content. In conclusion, encapsulation with spray drying for avocado oil could lead to improved stability during storage with respect to oxidation and the preservation of chlorophyll.

Condition of Processing and Change of Chemical Composition on the Salted-dried Sardine during the Storage (정어리 염건품의 제조 조건과 저장중의 성분변화)

  • JEONG Hae-Kyung;PARK Yeung-Ho
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.16 no.3
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    • pp.231-238
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    • 1983
  • An investigation on optimum condition for processing of salted-dried sardine and quality change of the product during the storage was carried out. The fillets of sardine were salted in 5, 10 and $15\%$ NaCl solution for 12, 24 and 36 hours at $9-10^{\circ}C$, respectively and air-blast dried at $24-25^{\circ}C$ with a velocity of 3 m/sec and then stored at room temperature for 30 days. The results were as follows : The optimum condition for the product was salting in $15\%$ NaCl solution for 36 hours as VBN and histamine contents were 27.5 mg/100g and 42.5 mg/100g, respectively, and also showed a good result in sensory evaluation. Histamine, VBN and TMA-N content of the dried fillets immediately after salting in $15\%$ NaCl solution for 36 hours increased to 47.8 mg, 29.5 mg and 5.4mg per 100g of the sample, respectively and increased slowly during the storage. The peroxide value and acid value of the lipid extracted from the product increased from 15.9 meq/kg to 114.0 meq/kg, and 12.6 to 30.5 during the storage. In the fatty acid composition, $C_{22:6}\;and\;C_{20:5}$ acids were decreased during the storage period.

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