• Bulletin of Food Technology
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• v.15 no.1
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• pp.52-54
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• 2002

식품에 대한 고압의 영향은 이미 19C말이나 20C초부터 연구되어 왔다. 본 논문에서는 식품의 보존기간(shelf-life)에 미치는 고압의 영향과 고압(HHP, High Hydrostatic Pressure)하에서 단백질의 3차 구조가 어떻게 변화하는 지에 대해 살펴 보고자 한다. 보통 식품가공에 적용되는 고압은 몇 초 내지 몇 분 동안에 50∼1000MPa 정도의 압력이 가해지는 것을 말한다. 소비자들이 식품을 선택할 때 가장 먼저 민감하게 느끼는 점은 식품의 색이다. 그러나 색은 가공과정이나 유통기간중에 변색이 쉽다. 따라서 색이나 풍미성분의 손실을 최소화하면서 식품의 보존기간을 늘리기 위해서 고압처리 기술이 주목을 받게 된 것이다. 식품의 색은 소비자들로 하여금 그 식품의 품질을 미리 짐작하게 하는 중요한 요소로서, 과일의 경우는 당도까지도 예측하게 한다. 그러므로 식품의 색이 소비자에게 주는 정보를 과소 평가해서는 안된다.

• Horticultural Science & Technology
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• v.28 no.5
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• pp.783-789
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• 2010

The effective method for heating root-zone during winter season was studied in the aspects of growth, yield and economics for tomato ($Solanum$ $lycopersicum$) in perlite bag culture. There were four root-zone heating treatments: two hours heating from one hour before to one hour after sunrise, four hours from two hours before to two hours after sunrise, 15 hours after sunset, and no heating. The growth characteristics of the upper parts of plants were not significantly different among the treatments, but root volume increased with longer heating of the root zone. The Plant Development Index, using stem diameter and the length between growing tip and the upper flowering truss, showed relation between yield per cluster and growth pattern. The treatment heating for four hours was the most economic in terms of growth and yield of tomato.

• Korean Journal of Food Science and Technology
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• v.30 no.2
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• pp.272-277
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• 1998

In order to study storage stability of fresh jujube fruits (Zizyphus jujuba Miller) controlled atmosphere storage, polyethylene film packaging and non-packaging were compared. Jujube fruits were stored on the following gas compositions: 1.5% carbon dioxide and 5, 8, 10, 12% oxygen at $7^{\circ}C$, respectively. And 0.05 mm PE packaging and non-packaging were stored at $1^{\circ}C,\;4^{\circ}C\;and\;7^{\circ}C$. Safe storage period of Bokjo jujube fruits was four weeks when stored in CA condition of $O_2\;10%\;and\;CO_2\;1.5%$ in terms of their overall quality. The rate of weight loss was not much changed either by storage method of CA or by PE film packaging. In surface color the a value of jujube fruits increased but L and b values decreased during the storage period. Hardness showed the trend of increase in all the treatment for 2 weeks of storage while in CA it decreased more than the others after 4 weeks of storage. Soluble solids and titratable acidity were changed slightly. Vitamin C contents were gradually decreased in all treatments, but non-packed jujubes at $1^{\circ}C$ were slightly increased.

• Journal of Animal Science and Technology
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• v.54 no.1
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• pp.35-41
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• 2012

The aim of this study was to offer information about appropriate processing method for dry cured-ham with controlled ripening condition. In this study, three different treatments were performed: High salt group (HS), 18 hams were salted with 70 g $kg^{-1}$ salt (w/w) Middle salt group (MS), 18 hams were salted with 50 g $kg^{-1}$ salt Low salt group (LS), 18 hams were salted with 30 g $kg^{-1}$ salt. Also three drying periods were applied (180 days, 270 days and 360 days). The weight loss in HS was higher (5.62%) on curing step and in LS was higher (12.35%) on post-salting step compared to other groups. On fermentation stage, weight loss of HS was higher than that of LS (p<0.05). Weight loss on drying was increased as the drying period passes (p<0.05). Moisture contents were significantly (p<0.05) decreased and fat contents were significantly (p<0.05) increased in all treatment groups as drying period increased. The different drying periods affected fatty acid compositions on all salting levels; saturated fatty acid contents were increased (p<0.05) with more drying, whereas unsaturated fatty acid contents were decreased (p<0.05) as drying period increased.

• Journal of Bio-Environment Control
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• v.19 no.4
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• pp.257-265
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• 2010

The objective of study was carried out to investigate the proper nutrient nitrogen concentration and irrigation period for increasing plant growth and flowering in Ardisia pusilla. Nutrient nitrogen concentrations were 120, 150, 180 and $210\;mg{\cdot}L^{-1}$ and they were based on the Sonneveld solution. Irrigation periods were divided into ED (except dormancy) and TG (total growth) according to plant age. The results of plant age and irrigation period, growth of 1 year-old plant was promoted by nitrogen concentration above $150\;mg{\cdot}L^{-1}$ regardless of irrigation period. And plant growth values of 2 years-old in TG treatments were higher than ED treatments, especially TG-180 treatment was best of all. The contents of total nitrogen of leaves after flowering were increased with nutrient nitrogen strength. And the contents of potassium, calcium, magnesium and phosphate slightly were decreased or were no significant differences. Plant growth and flowering decreased when nitrogen concentration was over $210\;mg{\cdot}L^{-1}$. Therefore, TG-150 and TG-180 were supposed to be appropriate treatment for plant growth and flowering of 1year-old plant and 2 years old plant, respectively.

• Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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• 2003.04a
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• pp.142.1-142
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• 2003

저장 중 단감은 과피 및 과육의 변색 발생으로 인한 품질저하가 심각하게 발생하고 있는데, 아직까지 이를 방지하기 위한 원인 규명은 매우 미흡한 실정이다. 이에 본 연구에서는 단감의 재배지, 수확시기, 크기, 예조기간, 저장온도, 저장기간, 포장재의 두께 등을 달리하여 저장하면서 처리조건에 따른 단감 과육의 갈변 발생 관련성을 조사하였다. 단감의 변색발생 증상은 저장 1개월 이후부터 일부 나타나기 시작하여 저장기간이 경과할수록 심하였다. 단감의 갈변 발생률 및 갈변 정도를 실험 처리구별로 살펴보면 과수원, 수확시기, 예조기간, 저장온도, 포장재의 두께, 포장 내 가스조성에 따라 차이를 보였는데 단감의 수확시기가 늦을수록, 수확후 예조기간이 짧을수록, 저장을 위해 사용한 포장필름의 두께가 얇을수록 갈변발생정도가 심하였다. 또한 단감의 과수원에 따라서도 갈변의 발생률이 차이를 보여 동일지역이더라도 재배조건에 의하여서도 영향을 받는 것으로 나타났다. 이와 같은 결과를 종합하여 보면 단감 과육의 갈변발생은 수확 전 및 수확 후 인자들의 단독적인 영향이기보다는 복합적인 영향에 의한 것으로 추정되었다.

• Journal of Practical Agriculture & Fisheries Research
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• v.3 no.1
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• pp.79-84
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• 2001

The experiment were carried out to establish the optimal condition of bulblet size, low temperature treatment and time of incubation in acclimatization on stem emergence of Lilium oriental hybrids. The large size bulblet was better than middle and small size bulblets in percentage of stem emergence and weight of bulblets. The highest percentage of stem emergence was 95% in large size bulblet 'Acapulco' but small size bulblet of 'Casablanca' was no stem emergence. Low temperature treatment(5℃)for breaking dormancy was needed at least more than 9weeks. Weight of bulblets and percentage of stem emergence was not good in 5℃ treatment for 6 weeks. The best stem emergence showed 5 month growing in vitro and the weigh test bulblets during acclimatization of bulblet

• Journal of the Korean Society of Food Science and Nutrition
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• v.42 no.11
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• pp.1783-1791
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• 2013

This study is investigated to evaluate the enhancement of antioxidant compound and activity of rough rice with different germination periods and high pressure treatment. The subject was germinated at $37^{\circ}C$ for 6 days (HP0), and then the germinated rough rice were subjected to 30 MPa for 24 hr (HP24) and 48 hr (HP48), respectively. HP0, HP24 and HP48 samples were prepared and extracted with 80% ethanol. The highest total polyphenol contents (5.15 mg/g) occurred in treating at HP48 after germination for 5 days. The total phenolic acid contents including gallic acid, chlorogenic acid, catechin, ${\rho}$-coumaric acid, ferulic acid, salicylic acid, naringin, myricetin, trans-cinnamic acid, naringenin and kaempferol increased from $37.26{\sim}204.32{\mu}g/g$ at HP0 to $77.29{\sim}283.05{\mu}g/g$ at HP48. In antioxidant activity analyses, HP48 extracts showed higher values in ABTS and DPPH radical scavenging activity, reducing power, and $Fe^{2+}$ iron chelating effect than those of the HP24 and HP0 extracts. These results suggest that the combined treatment of high pressure treatment and germination process efficiently enhanced antioxidant compound and activity of rough rice.

• Journal of Life Science
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• v.21 no.12
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• pp.1746-1751
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• 2011

This study examined the effects of estrogen, progesterone and tamoxifen at different concentrations and treatment periods on proliferation of a human cervical carcinoma cell line, HeLa, in culture, based on MTT assay. Estrogen did not have an effect on the cellular proliferation in concentrations up to $1{\mu}g$/ml for treatment periods of between 2.5 and 6 days, but significantly inhibited proliferation at a higher concentration of $10{\mu}g$/ml in a progressive manner with increasing treatment periods. Also, treatment of HeLa with more than $10{\mu}g$/ml of progesterone for 2.5 days significantly inhibited proliferation and caused a concentration-dependent inhibition with 4 days of treatment. However, longer treatment with progesterone for 6 days abolished the concentration-dependent inhibitory effect on cellular proliferation observed with the 4-day treatment period. Furthermore, tamoxifen required a higher concentration ($100{\mu}g$/ml) than estrogen to bring about the inhibitory effect on the HeLa proliferation. These results suggest that high concentrations of estrogen, progesterone and tamoxifen may suppress proliferation of HeLa, and both the concentration and the treatment period may also influence their inhibitory effects on cellular proliferation.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2005.10a
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• pp.142-145
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• 2005

pH는 두 처리구 모두 저장기간이 길어짐에 따라 유의적으로 감소하였다(P<0.05). T1의 염도는 저장 전 기간 동안 유의적인 차이가 없었고(P>0.05), T2는 저장 28일에는 1.33%로 유의적으로 높았다(P<0.05). 당도는 T1이 T2 보다 저장 전 기간 동안 유의적으로 높았다(P<0.05). 저장기간이 길어짐에 따라 T1에서 $L^*$값과 $b^*$값은 증가하는 반면 T2는 감소하였다. $a^*$값과 전단가(g/$cm^2$)는 저장기간이 경과함에 따라 모두 증가하였다. 관능검사결과, 저장 28일차까지 전체적인 기호도는 6,75(T1)${\sim}$7.00(T2) 수준으로 비교적 높은 점수를 얻었다. 본 연구에서 양념으로 사전 숙성 처리하여 진공포장한 양념 사슴육은 새로운 메뉴로서의 가치가 있을 것으로 여겨진다. 본 연구에서 양념으로 사전 숙성 처리하여 진공포장한 양념 사슴육은 새로운 메뉴로 유용할 것으로 여겨진다.