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최병주,심재성,밝훈,Choi, Byung-Ju,Shim, Jai-Sung,Park, Hoon 한국잔디학회 1994 한국잔디학회지 Vol.8 No.3
Effect pf rape seed oil cake compast (OM) active carbon(C) compound fertilizer (NPK) and magnesium sulfate (Mg) application on Zoysia koreana growth by lysimeter of 50cm soil column filled with a low fertility loam. Effect on growth was in order of OM>OM . NPK interaction> NPK . active carbon and Mg were not effective OM . NPK interaction effect was negative on leaf width and root dry matter yield. OM and OM . NPK interaction were most effective on rhizome growth. Their effect did not change the ratio of growth rates between aerial part and rhizome but change that between aerial part and root. Leaf width was most sensitive to the treatments.
일부(一部) 농촌주민(農村住民)의 사망(死亡) 실태(實態) 조사(調査)
최병주,Choi, Byung-Ju 대한예방의학회 1977 Journal of Preventive Medicine and Public Health Vol.10 No.1
A study on the status of death in rural area was conducted during the period from July '75 to August '75. 1,225 families and 8,067 population (4,124 male, 3,943 female) had been lived and 149 events of death since 5 years before study were occurred in survey area, Nammyon, Hwasoongun, Chonnam. The summarized results were as follows: 1. Quinquennial death rate was 3.7 (5.2 for male, 2.1 for female). 2. In respect of age group, the highest group was over 70 years old group (age at death, 30.8% of total death). High age groups (over 50 years old) occupied 71.1% of total death and death rate in these groups were higher in male than female. Child death (0-4 years old) occupied 7.4% of total death and infant death rate was higher in female than male. 3. Duration of sickness before die was highest in 1 to 12 months (39.6%) 4. The most frequent cause of death was disease of digestive system (12.1%). Other important causes were disease of circulatory system (10.7%), disease of respiratory system (9.4%) and infectious and parasitic disease (4.7%). Disease of digestive system was the most frequent cause of death in male (14.0%) and disease of respiratory system was the most frequent cause in female (9.5%).
경기도 수개 골프장의 표토 토양화학성과 잔디의 무기성분함량
최병주,심재성,주영희,밝훈,Choi, Byung-Ju,Shim, Jai-Sung,Ju, Yeong-Hee,Park, Hoon 한국잔디학회 1993 한국잔디학회지 Vol.7 No.2
Surface soils and aerial parts of Korean lawn(Zoysia koreana) at normal fair way of 4 golf courses and yellow discolored fairway of one golf course in Kyonggi province were taken at and analyzed for mineral contents in soil Mg and Ca were most deficient while EC was too high and phosphorus was exess. There were significant positive correlation between pH and Ca and between EC and total N. There was no consistent simple correlation between single component in soil and plant, indicating the involvement of multi-minerals in one mineral absorption. m mineral contents of aerial part Mg was severely low. potassium moderately but Ca was normal, Mg and Ca showed significant correlation in aerial part, yellow-discolored lawn showed the lowest content of Mg in aerial part and surface soil. Very high N and high phosphorus in aerial part inspite of low P in soil. The above facts indicates Mg deficiency in fair way soils in most golf courses resulting in yellow-discoloration in lawn.
곽병길(Byung-Kil Kwak),김창환(Changl-Hwan Kim),최병주(Byung-Ju Choi),김규호(Kyu-Ho Kim),이상봉(Sang-Bong Rhee) 한국조명·전기설비학회 2014 조명·전기설비학회논문지 Vol.28 No.11
In electrolysis smelting plants that using high DC current, the bus bar is most important facility for delivering the high current. The copper made bus bar is widely used for various advantages as good electrical and thermal conductivity, resonable malleability, ductility, and not rust easily. However, when high current in copper bus bar, temperature rises and maximum allowable current capacity is restricted by temperature of bus bar. In this paper, we investigated temperature variation of copper bus bar by putting cooling water channel imposed to bus bar construction. For the validity, various simulations were carried out.
주재현 ( Ju Jae-hyun ),방홍순 ( Bang Hong-soon ),최병주 ( Choi Byung-ju ),김옥규 ( Kim Ok-kyue ) 한국건축시공학회 2018 한국건축시공학회 학술발표대회 논문집 Vol.18 No.1
Apartment houses are now a popular form of general housing, and the construction techniques and materials quality used to construct apartments are also continuously evolving as if they were representative. However, issues concerning flaws are constantly being reported in the press. This study attempts to analyze the trend of conflicts related to defects and to analyze the types of defects received in the apartment building, to suggest the development of the integrated defect management system, and to develop the construction based on the development of the system.
MC3T3-E1 세포의 ALP activity에 대한 PDGF-BB의 영향
이경희,이재목,최병주,유현모,서조영,Lee, Kyung-Hee,Lee, Jae-Mok,Choi, Byung-Ju,Yu, Hyun-Mo,Suh, Jo-Young 대한치주과학회 1997 Journal of Periodontal & Implant Science Vol.27 No.4
The ultimate aim of periodontal treatment is periodontal regeneration, which necessiates the regeneration of bone tissues. This paper investigated the effect of growth factor on bone cells. Platelet-derived growth factor(PDGF) is the one of the polypeptide growth factor that has been reported as a biological mediator which regulates activities of the cell proliferation, migration and metabolism of undifferentiated mesenchymal cells. The purpose of this study is to evaluate the effects of PDGF on bone nodule formation and ALP activity of MC3T3-El cells. Cells were seeded at $1{\times}10^5cells/well$ in alpha-modified eagle medium containing 10% fetal bovine serum, lOml beta-glycerophosphate and $50{\mu}g/ml$ of ascorbic acid. PDGF 0, 0.1, 1, 10 ng/ml were added to the cells at a confluent state and cultured for 3, 7, 14, 21, 28 days. We examined bone nodule formation and alkaline phosphatase activity. The results were as follows : There were bone nodule formation at day 21 both in control and all the experimental groups, and at day 28, all the experimental groups showed much more bone nodules than control groups. Compared to control-l group, ALP activity was increased in PDGF O.1ng/ml group and was decreased in 1,10ng/ml PDGF treated groups.{P< 0.05, P< 0.01) Compared to control-2, ALP activity was decreased in all the experimental groups except PDGF 0.1ng/ml in 21 day group. In the time-response effect, ALP activity was increased by the day 14 in all the experimental groups and thereafter ALP activity was decreased.(P<0.05, P< 0.01) In the dose-response effect, ALP activity was decreased as the dose of PDGF was increased, and after 21 day ALP activity was lowest in 1 ng/ml group, ALP activity was highest in the day 7 in control group and 0.1 ng/ml, 14 day experimental group. In conclusion, PDGF is considered more effective in the proliferation than differentiation of osteoblast-like cells, and it may be useful to study the combined effect of PDGF and other growth factors on osteoblast-like cells.