• Journal of Mushroom
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• v.14 no.4
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• pp.197-201
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• 2016

During cultivation of Pluerotus ostreatus, there were happened several problems by mushroom flies. Many mushroom farms were faced with the problem that mushroom production periods became shorter by mushroom fly. In this study, we examined effect of Lycoriella ingenua on the production of P. ostreatus. When we used 10 adult flies at the time of inoculation, mushroom production decreased by 10.8% as compared to that of the control. And when L. ingenua used more than 20 adult flies, contamination occurred in all treatments. And when L. ingenua used at the time of P. ostreatus mycelium cultured during 14 days, it was confirmed that the yield of P. ostreatus decreased in proportion to the number of L. ingenua.

• Journal of the Korean Society for Railway
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• v.13 no.4
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• pp.396-403
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• 2010

Train control system require high level of safety since these are vital control system to ensure safe operation of the train. According to these reason, safety-related regulations for railway signaling systems are standardized in IEC. In Korea, many attempts are tried to procure the level to meet the international standards, but thats's efforts are beginning steps. HAZOP study is recommended for hazard analysis at IEC standards, but this method has several unsuitable problems because this method is developed in chemical plant domain. In this paper we recommend new method of HAZOP, named HAZOP-KR, which would be suitable for analyzing safety of the train control systems. An example of this method applied to real system is also included.

• Toxicological Research
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• v.20 no.1
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• pp.37-42
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• 2004

This study was undertaken to investigate comparative anti-tumor activity of water extracts of Phellinus gilvus (PGE), Phellinus linteus (PLE), and Phellinus baumii (PBE) in vitro. The anti-tumor activity in the present study was evaluated by sulforhodamine B (SRB) and microtetrazolium (MTT) assay in terms of cell survival level. The tumor cells (sarcoma 180 and P388) were treated with PGE, PLE, and PBE (7.5, 15, and 30 $\mu\textrm{g}$/ml) and Doxorubicin (DOX) (0.001~10 $\mu\textrm{M}$). The results showed that DOX, PGE, and PLE inhibited proliferation showing a dose-dependent manner against both tumor cells. However, PBE was inhibited by the only 30 $\mu\textrm{g}$/ml in both cells proliferation. In conclusion, all of PGE, PLE, and PBE used in this study have shown anti-tumor activity against both sarcoma 180 and P388. Among them, PLE was the most effective in anti-tumor activity against sarcoma 180 (p<0.05) and PGE was against P388 in SRB assay. PLE, however, was against P388 (p<0.05) in MTT assay.

• Journal of the Korean Society of Costume
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• v.58 no.5
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• pp.13-34
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• 2008

In Headgear and Ornaments for Diadem in the Period of the Three States there was Conical Cap(or Pointed Cap), Feathered Cap(Trim), and Crown[Tree-typed Diadem and Tree and Antler-typed Diadem] was excavated from the tombs. Feathered Trim is 5 types, Feathered Trim I-A, Feathered Trim I-B, Feathered Trim II-A, Feathered Trim II-B, Feathered Trim II-C in according to upper part of central insert plate style. Feathered Trim I-A, I-B, II-B type was general style that was found in most of the old tombs in ancient Silla, Gaya. Feathered Trim II-A type was excavated from the only Silla tombs and II-C type was excavated from Gaya tombs. The Ornaments for Diadem in Baekje was excavated from the tombs is adorned with a arranged leaf-stems on either sides and the flower-shaped. They were distinguished with the original mode of Goguryeo and ancient Silla at the time. Tree-typed Diadem is five part in according to the Mountain(;山)-typed piled up. Only one Mountain(;山)-typed one in three stand-up ornament(I-1 type), and three step one in three stand-up one(I-2 type), modification one (I-3 type), three step one of four and five stand-up ones(I-4 type), and four step one of four and five stand-up ones (I-5 type). Tree and Antler-typed Diadem is three part in according to the step of Mountain(; 山)-typed and cross-shaped of the upper part. Three one of three step one of Mountain(;山)-typed and two Antler- typed (II-1 type), cross-shaped one(II-2 type), four step one(II-3 type).

• Transactions of the Korean Society of Mechanical Engineers B
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• v.35 no.12
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• pp.1335-1341
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• 2011

The purpose of this research is to investigate how separated and reattached flow affects mass transfer, by comparing the local mass transfer characteristics on an inclined flat plate with those on a parallel flat plate. The local mass transfer coefficients for the flat plate were measured using the naphthalene sublimation technique; the inclined angle of the flat plate was varied from $-10^{\circ}$ to $10^{\circ}$ at $5^{\circ}$ intervals, and the free-stream velocity was varied from 2m/s to 15m/s. At positive inclined angles, the local Sherwood numbers decreased gradually because the boundary-layer thickness increased. On the other hand, for negative inclined angles, the local Sherwood numbers assumed the minimum value at the separation point of the recirculation flow and the maximum value at the reattachment point. The average Sherwood numbers for both positive and negative inclined angles were lower than those in the case of the parallel plate.

• The Korean Journal of Mycology
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• v.28 no.1
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• pp.6-10
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• 2000

For artificial cultivation of Phellinus gilvus (Schw.) Pat we have conducted a study on cultural characteristics and condition of fruitbody formation. The optimum temperature was about $30^{\circ}C$ at pH $6.0{\sim}7.0$ for mycelial growth. Optimum sawdust media were oak sawdust+willow sawdust(5:5, V/V), oak sawdust+willow sawdust+rice bran (4.5:4.5:1, V/V) and oak sawdust+pine sawdust+rice bran(4.5:4.5:1, V/V) and, the spawn incubation period was about $25{\sim}26$ days. Mycelial growth in the inner portion of oak log was 200 mm after 60 days and duration for the first fruitbody primordia were formed about 90 days after inoculation.

• The Korean Journal of Mycology
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• v.28 no.1
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• pp.11-15
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• 2000

For artificial cultivation of Phellinus pini (Thore. Fr.) Ames, we conducted some study on mycelium growth and optimum condition for fruitbody formation. The optimum condition for mycelial growth was $25{\sim}30^{\circ}C$ at pH $5.0{\sim}6.0$. Optimum sawdust media were oak sawdust+willow sawdust+rice bran (4.5:4.5:1, V/V) and oak sawdust+pine sawdust+rice bran (4.5:4.5:1, V/V) and the optimum spawn incubation period was about $33{\sim}34$ days. Mycelial growth in the inner portion of oak log was 40 mm after 60 days and duration for first fruitbody primordia formation was about 110 days after inoculation.

• Journal of Mushroom
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• v.13 no.3
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• pp.157-162
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• 2015

This study was carried out to analyze of the cause of button mushroom production decrease of Gyoengbuk province. In 1978, Agaricus bisporus was produced 48,000 ton and exported more than $50 millions. But since 2000, Domestic production of button mushroom was decreased by 70%, and button mushroom farm was also decreased by 37%. Cultivation area was increased by 6%, but Gyeongbuk Province was decreased by 30%. Especially, Production per $3.3{\ss}{\breve{S}}$ was dramatically decreased more than half. There were several causes such as rising labor and material cost, climate changes, and aging of mushroom cultivation farmers. And there was no effort to develop of domestic button mushroom cultivation equipments. One of the main reasons for this reduction was supplied to low quality of button mushroom compost to the farm.

• The Korean Journal of Mycology
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• v.28 no.2
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• pp.93-96
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• 2000

To investigate the effect of inorganic nutrient supplement in oyster mushroom (Pleurotus ostreatus), we have conducted some study on cultural and growth characteristics of fruitbody formation and chemical composition of media and fruitbody. When supplemented with slow releasing fertilizer, contamination rate was not different from non-supplemented medium, days for incubation time and first pinhead were faster than non supplemented medium. And fruitbody yield and biological efficiency were increased $10{\sim}28%,\;7{\sim}20%$ respectively, but biological efficiency was decreased when increased supplement ratio. The chemical compositions (total carbon, total nitrogen, ammonia nitrogen, nitrate nitrogen, potassium and phosphate) of slow releasing fertilizer supple mented medium and fruitbody were compared with non-supplemented.

• The Korean Journal of Mycology
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• v.24 no.3 s.78
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• pp.223-227
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• 1996

The effects of addition of dried apple pomace to sawdust substrate on the growth of Flammulina velutipes were investigated during the period of 2 years $(1994{\sim}1995)$. Dried apple pomace used in this study consisted of 44.6% C, 0.54% N, 0.16% CaO, 0.16% $P_2O_5$, 0.11% MgO and 1.29% $K_2O$ (pH 4.4). The addition of 15% apple pomace (v/v) increased the yield of the mushroom fruitbody by 9%, and period of primordia formation was similar regardless of the treatments. In economical analysis, the addition of 15% apple pomace (v/v) increased 29% compared to the control treatment in relative income.