• 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.138-139
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• 2003

감귤의 수확후 저장, 유통과정에서 부패 억제 및 약제 후숙처리 대체 효과를 얻기 위하여 환경친화적 방법으로서 제한적 열처리 기술의 적용 가능성을 확인하고자, 제주 서귀포산 조생종 온주 감귤의 열풍(hot air)처리에 따른 저장중 품질특성 변화를 살펴보았다. 상처가 없는 일정한 크기(약 120 g 내외)의 건전 과실을 선별한 후, 45$^{\circ}C$에서 2, 4, 6시간 동안 열풍을 가한 다음 5$^{\circ}C$에서 2시간 냉각하였다. 충분히 냉각시킨 과실을 통기성 천공 LDPE 필름에 포장하여 5$^{\circ}C$에서 3주, 18$^{\circ}C$에서 1 주간 저장하면서 생리적, 이화학적, 관능적 특성변화를 측정하였다. 열풍처리 직후 초기 호흡률은 처리구 모두 무처리구와 비교하여 높았으나 처리시간과는 유의적 상관성이 없었고, 저장중 처리구 감귤의 호흡률은 감소하여 21일째는 무처리구와 유사한 수준을 나타내었다. 과실내 기체조성은 처리구간에 차이를 보이지 않았으나 저장 21일부터는 저장온도 상승에 따라 $O_2$는 다소 감소하고 $CO_2$는 증가하는 양상을 보였다. 또한 과즙의 pH, 산도, 당 함량은 열처리에 의해 거의 영향을 받지 않았으며, 과실의 생체 중량감소율과 경도에서도 처리구간의 유의적인 차이를 구분할 수 없었다. 과피 표면색은 저장중 초기에 비해 다소 붉은 색으로 변하였으나, 6시간 처리구에서는 비교적 자은 노란색을 유지하였다. 한편 부패과 발생률에 있어서는 4시간 처리구가 축부병 등에 의한 짓무름 현상과 곰팡이 발생정도, 검은 썩음병에 따른 흑변 정도에서 저장중 가장 낮은 수준을 나타내었다. 그러나 관능적 평가에서는 열풍처리구와 무처리구 사이에서의 유의적인 차이를 발견할 수 없었다. 결과적으로 45$^{\circ}C$, 4시간이상의 제한적 열풍처리는 조생종 온주 감귤의 저장중 부패과 발생률을 현저히 감소시킴으로서 수확후 품질유지에 효과적인 열처리 조건임을 확인할 수 있었다.

• Conservation Science in Museum
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• v.14
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• pp.13-22
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• 2013

The Nectar Ritual Painting(Jeung7551) in National Museum of Korea is estimated to have been produced in the 16th century. Ezimagodo who is the head priest of Ruganji in Kyoto, Japan donated this painting in 2010. Overall, damages were serious, such as missing, staining, folding, insects of the face and mounting silk, therefore, it need to conservation treatment. The treatment of conservation in painting was removing surface stains and repairing missing area. It was mounted by following the original form. The analysis result of textile in mounting and support fiber used silk and hemp in microscope. Pigments in paint were divided into six color types. This painting was used that vermilion(cinnabar) and red lead for red color, litharge(massicot) and gold for yellow color, lead white for white color, malachite for green color, azurite for blue color, and carbon black(chinese ink) for black color.

• Restorative Dentistry and Endodontics
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• v.21 no.2
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• pp.664-676
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• 1996

테트라싸이클린에 의한 치아 변색은 심미성을 고려한 임상 치료시 커다란 난제로 남아 있다. 본 연구는 백서 치아에 테트라싸이클린을 주입하여 야기되는 색상과 구조적인 변화도를 측정하여 향후 연구에 기초자료를 제공하기 위해 시행되었다. 24 마리의 백서를 각기 8 마리씩 3 군으로 분류하여 대조군은 정상적인 사육을 식염수군은 TC군과 동량의 식염수를 주사하였으며 TC군은 12 ml에 용해시킨 60 mg의 테트라싸이클린을 복강내로 2 주간 주입하였다. 최종 주입후 1 주간 정상 사육한 다음 cervical dislocation법에 의해 희생시켜 시편을 채득한 후 각 치아를 횡단하여 실물현미경과 FlexCam을 이용하여 컴퓨터에 영상을 저장한 다음 색 변화량을 Adobe Photoshop으로 측정하였으며 구조변화는 주사전자 현미경을 이용하였다. 치아색 변화량의 유의성 검정은 ANOVA와 Scheffe test를 이용하였으며 본 실험 결과는 다음과 같다. 1. 각 군의 $a^*$ 수치는 대조군 -6.12 (1.18), 식염수군 -8.00 (1.33), TC군 -18.56 (2.52)로 나타났으며 $b^*$ 수치는 대조군 1.12 (2.13), 식염수군 1.62 (1.45), TC군 28.67 (5.18)을 보였다. 즉 테트라싸이클린에 의해 $a^*$와 $b^*$의 수치가 유의성있게 (p<0.01) 초록색과 노란색 방향으로 변화하였다. 2. 테트라싸이클린에 의해 치경부 법랑질 외면이 검게 변색되었으며 울퉁불퉁한 양태로 변화되었다. 그러나 법랑소주의 형태, 방향등은 차이를 보이지 않았다. 3. 각 군간 상아세관의 수, 방향, 크기등이 차이가 없었다. 치수측에서의 관찰결과 대조군과 식염수군에서는 상아세관들의 입구가 크고 명확하게 보인 반면 TC군에서는 입구가 좁고 부분적으로 막힌 양태도 관찰되었다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.731-734
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• 2009

In this paper, we propose the method the vehicle color recognizing in the image including a vehicle. In an image, the color feature vector of a vehicle is extracted and by using the backpropagation learning algorithm, that is the multi-layer perceptron, the recognized vehicle color. By using the RGB and HSI color model the feature vector used as the input of the backpropagation learning algorithm is the feature of the color used as the input of the neural network. The color of a vehicle recognizes as the white, the silver color, the black, the red, the yellow, the blue, and the green among the color of the vehicle most very much found out as 7 colors. By using the image including a vehicle for the performance evaluation of the method proposing, the color recognition performance was experimented.

• Journal of the Korean Society of Food Science and Nutrition
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• v.32 no.4
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• pp.591-597
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• 2003

To investigate antioxidative and antiaging effects of yellow and black soybeans in vivo system, male SD rats (n＝24) were fed the diets containing casein (C), yellow soybean (YS) or black soybean (BS) for 8 weeks. Experimental groups showed the preventive effect on lipid and protein oxidation, especially protein oxidation of plasma was significantly inhibited in BS group. SOD and catalase activities were not different among the groups, but hepatic glutathione peroxidase (GSH-px) activity was significantly lowered in YS and BS groups compared with control group. The contents of superoxide anion radical in cytosol were significantly lowered in experimental groups compared with control group. And hydroxyl radical was slightly lowered in soybean groups. Lipofuscin accumulation on the heart and eyes of rats was effectively inhibited by yellow soybean and black soybean, respectively. In conclusion, these results suggest that yellow soybean and black soybean have the antioxidative/antiaging effect in vivo system and they have similar activities despite different color of seed coat.

• Journal of Plant Biotechnology
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• v.32 no.2
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• pp.117-121
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• 2005

Immature embryos of 3 cultivars (Du Me Chal, Mi Baek Chal, Heug Jeom Chal) and 5 genotypes (HW1, KL103, HW3, HW4, KW7) were cultured on medium containing MS salts, Eriksson's vitamins, 1 mg/L 2,4-dichlorophenoxyacetic acid, 25 mM proline, 100 mg/L casamino acid, 3 mM MES, 1.7 mg/L $AgNO_3$ and 20 g/L sucrose (SIM). Frequency of somatic embryo formation on explant of immature embryos showed in HW1 (45.20%), KL103 (5.75%), HW3 (37.20%), HW4 (30.10%), KW70 (55.20%), Mi Baek Chal (18.74%), Heug Jeom Chal (22.41%), Du Me Chal (36.72%) and Hi II type (<10%), respectively. Yellowish friable embryogenic callus (YFEC) such as type II callus of Hi II genotype only produced from the HW3 and Heug Jeom Chal, whereas other cultivars and genotypes were directly formed somatic embryos with late-embryonic stages or expanded yellowish compact somatic embryo with morphological abnormality. The yellowish friable embryogenic callus (YFEC) could be proliferated on the same medium, which were maintained embryogenic capacity for 6 months over. Upon transfer to first regeneration and second regeneration medium, somatic embryos converted to plantlets at a frequency of approximately 100%. However, the expanded somatic embryos with abnormal morphology were slowly proliferated when subcultured on the same medium, and some of them were degenerated or converted to plantlets at a frequency of approximately 25%. Accordingly, The Heug Jeom Chal and HW3 genotype will be further used for development of high frequency transformation system in domestic maize germplasm.

• Journal of Bio-Environment Control
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• v.21 no.3
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• pp.252-260
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• 2012

This study was carried out to compare the storability in MA storage and quality of paprika fruits among 9 cultivars grown in 2011 and 12 cultivars in 2012. 'Mosanto 7044' was the most proper cultivar in red-type paprika has grown in 2011 for MA storage, because it showed relatively higher fruit weight, firmness, soluble solid content, and the lowest ethylene production rate, as well as the second longest shelf life. 'Stayer' was suitable cultivar in yellow-type paprika cultivated in 2011, because it showed higher firmness, soluble solid content and lower ethylene production rate than other cultivars. 'Nagano' was the most proper cultivar in red-type paprika has grown in 2012 for MA storage. Because it showed relatively higher fruit weight, firmness, flesh thickness and the lowest ethylene production rate and decay ratio, although the shelf life of 'Nagano' was the third longest (28 days). 'Freestar' was the excellent cultivar in yellow-type paprika cultivated in 2012, because it showed higher firmness, vitamin C content and lower respiration rate than other cultivars and the longest shelf life of 26 days. The shelf life had a high correlationship with ethylene production rate (r = -0.5504), and soluble solid (r = 0.6112), as comparing with the shelf life and the fruit characteristics of 21 cultivars paprika has grown in 2011 and 2012.

• Journal of the korean academy of Pediatric Dentistry
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• v.36 no.1
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• pp.114-118
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• 2009

Sialolithiasis is the formation of calcific concretions within the ductal system of major or minor salivary glands. The submandibular gland is most involved because of its high viscosity of the saliva and the long, curved duct. It may occur at any age but, it is most common in middle-aged adults and rare in childhood. Clinical symptoms in sialolithiasis are variable but, swelling is the most common, followed by the pain. Clinical examination and radiographic examination(panoramic and mandibular occlusal radiographs, sialography, intraoral-, extraoral- ultrasound, CT scan, MRI and sialoendoscopy) can help to confirm a diagnosis and localize a stone. The treatment is surgical intervention, either removal of the sialolith or sialoadenectomy. However, non-invasive techniques including shock-wave lithotripsy, $CO_2$ laser and endoscopic treatment used in selected cases. A 5-Year-old girl referred from private practice for evaluation of a yellowish mass on the floor of the mouth. She complained that it had became three times bigger than four months ago when it was found for the first time and she had some pain on submandibular gland area occasionally. On physical examination, a firm and yellowish mass could be seen at the orifice of the submandibular duct. Diagnosis is the submandibular sialolithiasis in the anterior Wharton`s duct. Under local anesthesia, stone was removed.

• Journal of Mushroom
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• v.3 no.2
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• pp.71-74
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• 2005

The sterile form of Inonotus obliquus is used for preparation of the medicine befungin that is effective in the treatment of gastritis, gastric ulcers, and several tumors. The fungus is known to be produced mainly on the stems of Betula platyphylla var. japonica that grows at high altitudinal (above 1,100 m) region in Korea. But, we found the mushroom on the stem of Betula costata at Mt. Jumbong in Korea. We isolated a pure culture of the fungus from the stem of B. costata by use of potato dextrose agar (PDA) medium with streptomycin. We could isolate the fungus from plant's tissue filled with hyphae, but not from other parts. The spore collected from the sclerotia showed $6.0{\sim}10.0{\times}4.5{\sim}6.0{\mu}m$ in diameter, and the hypha was $2.5{\sim}5.0{\mu}m$ in thickness. The colony showed irregular features and scattered yellow color at the center as the culture ages. We could find brownish setae at the yellow region of colony at 20 days of culture, and the size ranged $4{\sim}6{\times}100{\sim}420{\mu}m$. The oatmeal agar (OA) provided best growth for I. obliquus among five media (CDA, CMA, MA, OA and PDA). Optimum temperature ranged $25{\sim}30^{\circ}C$, and optimum pH was relatively alkaline with the range of pH 8.0~9.5.

• Research in Plant Disease
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• v.13 no.1
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• pp.61-65
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• 2007

English ivy (Hedera helix) in Araliaceae family is an evergreen climbing vine. A severe bacterial disease of English ivy was observed and investigated in January 2005. Initial symptoms on the leaves appeared as small water-soaked lesions on the lower surface. As the spots enlarged, the center became brown to brownish black and greenish-brown water-soaked, irregular margins surrounded the center, The spots developed into large irregular blotches, sometimes 5$\sim$10 mm in diameter, then coalesced. Finally, the water-soaked margins raised, dried out, became corky and broke in the center. A bacterial organism, isolated from the advancing margins of the lesions, was tested for its pathogenicity according to the Koch's postulates and biochemical and physiological tests identified the isolated bacterium as a Xanthomonas. The representative Xanthomonas strains (SL4821 and SL4822) isolated from English ivy were compared with a reference strain X. hortorum pv. hederae for fatty acid profiles, metabolic fingerprints and 16s rDNA sequences, showing that all outcomes were indistinguishable between the representative and reference strains. This is the first report of bacterial leaf spot of English ivy in Korea.