• Journal of the Korean Society of Tobacco Science
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• v.14 no.1
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• pp.12-23
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• 1992

This experiment was conducted to determine the optimum dosage of gamma rays for inducing artificial mutation of several mutant characters in the flue-cured tobacco. 1) In Hicks and BY 104, the gammarays irradiation has no significantly different effect on seed germination from the control. However, the average dosage for 50% growth inhibition was 25-30kr for all the varieties tested, which inhibition 46-52% and 43-57% of the seedling growths for Hicks and BY 104, respectively. 2) A mutant line 83H-5 was selected from Hicks by irradiation gamma ray at the level of 30kr. It has white flower, more resistance to bacterial wilt, Pssudomonas solanacearum, lower plant and stalk height, narrower leaf width, larger leaf shape index(lento width) and later days to flower when compared with the original variety Hicks. 3) White flower was recessive to pink flower in F, and Br (F1 X Hicks) progenies. F2 population of the cross gave segregation ratio of 3 pink flower:1 white flower, and B, (F1 X 83H-5) Population gave 1:1 ratio. Results showed that the white flower character is governed by a single recessive gene.

• Journal of the Korean Society of Tobacco Science
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• v.14 no.2
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• pp.97-103
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• 1992

KB 101 is a bacterial wilt(Pseudomonas solanaceamm E.F. Smith) and black shank (Phytophthora nicotianae Breda de Haan Var. nicotianae Waterhouse) resistant cultivar of burley tobacco (Nicotiana tabacum L.) KB 101 was developed by the Korea Ginseng&Tobacco Research Institute, and released in 1987. KB 101 was developed from a single plant selection in the F2 generation derived from the double cross, [(Burley 21X Burley 37) X (Burley 64X Ky 16)]. Burley 37 and Burley 64 were the source of resistance to bacterial wilt and black shank. Yield trials were conducted in the Fs through F6 generations at the four Exp. Stn. of Korea Ginseng &Tobacco Research Institute as JB 7705-1. On-farm yield trials were conducted in the F7 through F9 generations at the 45 locations of burley tobacco growing area from 1984 to 1986 as KB 101. KB 101 has an erect growth habit similar to that of Burley 21: plant size is larger and has more leaves than those of Burley 21. It is late maturing cultivar that flowers approximately 3 days later than Burley 21. The physical characteristics and chemical composition of KB 101 were similar to those of Burley 21.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2004.09a
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• pp.406-409
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• 2004

최근 Lee et al.$^{l-2)}$ 은 화강암질 편마암내 균열면의 방해석이 Eu의 변화에 큰 영향을 주며, 아울러 Eu 은 Am의 유사체로서 매우 적합한 원소라고 제안하였다. 이 논문에서는 1)희토류원소와 액티나이드 원소의 이온반경, 배위수 등의 상호비교와 2) 응집력(cohesive energy)의 유사성과 물리적/화학적 특성 그리고 3) 희토류원소 지구화학의 최근 연구결과를 토대로 하여, 고준위 방사성 핵종원소인 Am의 지질매체내 거동을 예측하기 위한 유사체(analog)로서 Eu이 매우 유용한 역할을 해준다는 가설2)을 검증한 결과를 보고하고자 한다. 연구방법으로서, 핵종원소의 지질매체별 흡착특성을 밝혀내기 위해 금번 실험에서는 희토류원소 암상별 분포의 특성을 고려하여 4종류(화강암질 편마암류 2종, meta-basalts, 응회암)의 시료를 선별하였다. 방사화학적 흡탈착 실험의 핵종동위원소로서는 152Eu와 241Am을 선택하였다. 이는 본 연구팀의 연구결과, Eu과 Am의 밀접한 물리적/화학적 상관관계 그리고 지질환경내에서의 거동특성을 고려한 것이다. 실험결과 양 동위원소의 지질매체와의 흡착 반응 특성을 비교해 볼 때, 시간의 경과에 따라 서로간에 매우 유사한 양상의 증감을 보여주면서 변화함을 알 수가 있었다. 이 결과는 희토류원소가 액티나이드 원소의 지질환경내 거동예측을 위한 유사체로서 매우 훌륭한 도구라는 것을 입증해 주는 것이라 할 수 있다.

• Journal of the Korean Society of Tobacco Science
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• v.20 no.2
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• pp.160-165
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• 1998

The Joint curing barns for flue-cured tobacco is a favorite with the tobacco farmers in Korea. However, most of farmer utilizing the joint curing barns indicated many problems such as high temperature and noise in the working room and a dry of cured leaves in the storage room. A structure of Joint curing barns has been modified to meet the needs of tobacco farmers. Compared with the unimproved joint curing barns, the improved one showed that the noise of workshop decreased about 7.7～10.8db, the amount of $CO_2$ decreased 40～50ppm in a working room and 80～100ppm in a machine room. Ammonia gas decreased 0.29mg/㎥ and the temperature of a working room dropped about 2.1～3.5$^{\circ}C$. The amount of air flow in a working room increased 23.2% at a site being 2m away from the entrance and 30.8% at a center. The inner temperature of the improved storage room showed that maximum temperature dropped about 3$^{\circ}C$, minimum temperature was high about 2$^{\circ}C$. The highest relative humidity was low 6%, the lowest one increased high about 10% when compared with the unimproved joint curing barns.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.36 no.4
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• pp.305-309
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• 1991

This experiment was conducted to investigate the effect of shattered grain by combine harvesting at the previous year on rice plant emergence at different planting methods and plant characteristics, The results are follows : Combine harvesting greatly influence on shattered grain of Samgangbyeo as Tongil variety (49.5kg/10a) compared to that of Nagdongbyeo as Japonica variety(27.8kg/10a), while Nagdong-byeo showed higher germination rate than Samgangbyeo, whether transplanted and direct seeded. Emergence of volunteer and seed mixture were lower in transplanted than in direct seeded. In variety test. Japonica variety showed higher emergence of volunteer rice and seed mixture than Tongil variety. Generally, no significant difference in yield components were observed with different varieties by the volunteer rice. But the volunteer rice caused by combine harvesting decreased culm length, panicle length, spikelet number, panicle number and ripening ratio. except l000-grain weights.

• The Korean Journal of Cytopathology
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• v.13 no.2
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• pp.60-65
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• 2002

The accuracy of fine needle aspiration cytology (FNAC) for the diagnosis of follicular lymphoma was investigated by a review of 13 FNAC specimens from 10 patients. All patients Included in this study were confirmed by surgical biopsy preceded by FNAC. Three aspirates were unsatisfactory because of scanty cellularity. Among the remaining 10 cases, 5(50%) were diagnosed as lymphoma, 3(30%) as reactive hyperplasia, one (10%) as metastatic small cell carcinoma, and one (10%) as granulomatous inflammation. Cytologic distinction between follicular lymphoma and reactive hyperplasia is very difficult with cytomorphology alone. Compared to reactive hyperplasia, the characteristic cytologic features such as relatively homogeneous cellular constituent, paucity of tingible body macrophages and lymphohistiocytic aggregates, and less mitotic activity in follicular lymphoma are important findings to prevent false negative diagnosis. In addition, lymphoglandular bodies are useful in distinguishing malignant epithelial tumor from lymphoid lesion.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.35 no.4
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• pp.261-265
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• 2009

Cystic hygroma, a cystic subtype of lymphangioma, is relatively rare tumor of lymphatic origin. The lesion is a benign, painless, soft, compressible malformation of the lymphatic system. They can arise anywhere along the lymphatic system, however they are usually located in the head and neck regions and in most cases appear by the age of 2 years. The cases in the adult is rarely occurred and a few cases are described in the literature. Surgical excision remains the treatment of choice. But complete extirpation of these lesion is often impossible, because the tumor tends to spread along vital structures. Therefore recurrence rates are accordingly high. This is a case report about 19 year old male patient with cystic hygro a on right retromandibular area. We obtained the successful, functional and esthetic result by surgical excision of the mass. Therefore, we report the case with a review of literatures.

• Journal of the Society of Naval Architects of Korea
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• v.29 no.2
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• pp.66-72
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• 1992

A computational method of the Michell integral for water of finite depth is developed and the method makes use of the expansion of the hull form by the Legendre polynomial in both the longitudinal and the vertical directions. The wave resistance coefficient is given as a quadruple summation of the product of the shape factor and the hydrodynamic factor. The shape factor depends only upon the geometry of the hull form, and the hydrodynamic factor upon the depth-based Froude number and the ratios of the water depth and the draft to the ship length. Example calculations are done for the Wigley parabolic hull and the Series 60 $C_B$ 0.6, and the comparison of our results with the existing experimental data is shown.

• Conservation Science in Museum
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• v.7
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• pp.75-87
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• 2006

The National Museum of Korea has striven for the stable preservation environment for its collection as it reopened in October 2005. The temperature and humidity, harmful gases in the collection storage space and the galleries were regularly measured to confirm whether the environment was stable for the collection; the material that could directly influence the collection such as showcases were tested in advance to select stable material. In addition, to prevent biological damage, whole collection was fumigated; insect monitoring traps have been regularly established to check the status of the collection storage space.

• Conservation Science in Museum
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• v.6
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• pp.39-46
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• 2005

The National Museum of Korea has a collection of various materials. In particular, items made from organic materials such as wood, paper, and leather are vulnerable to the influence of insects and germs, requiring fumigation as well as pesticides and bactericides. The influence of pesticides and bactericides on the change in dyed paper was examined by applying the oddy test used to confirm the toxicity of various materials used in museums. Results revealed that the products of B and H companies had the least influence on the change in dyed paper. On the other hand, the result of the examination of cochineal and curcuma dyed paper revealed a significant change in the control group compared to the one exposed together with dyed paper, probably because of humidity rather than the sample.