• The Korean Journal of Zoology
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• v.35 no.1
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• pp.37-44
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• 1992

북방산개구리, 참개구리 및 옴개구리를 사용하여 성숙된 난자의 세포질에서 활성을 띠는 성숙촉진요인( maturation promoting factor, MPF)을 미세주입 법으로 확인하고 이들의 성질을 조사하였다. 핵붕괴(germinal vesicle breakdown, GVBD)된 난자의 세포질을 미성숙 난자(GV난자)에 주입하고(75-100 nl) 이들을 15-24시간 배양했을 때 대부분의 GV 난자들이 핵붕괴를 일으켰으나(약 80%) 미성숙 난자(GV 난자)의 세포질을 주입했을 때에는 약 200nl의 난자들만이 핵붕괴를 일으켰다. 핵붕괴된 난자들의 crude extract를 주입했을 때에도 역시 성숙유도 효과가 있었으며 이종간에도 효과가 있었다. 난자의 성숙을 잘 일으키지 않는 옴개구리의 난자를 사용하여 MPF를 가진 세포질을 계대주입(serial transfer)하였을 때에도 MPF가 계속 활성을 띠는 것을 확인할 수 있었다. 아울러 개구리 난자의 MPF생성과 증폭과정에 CAMP의 증가나 단백질 합성의 저해가 미치는 영향을 조사한 결과. MPF의 작용이 유의하게 이들에 의해 억제되는 것을 알 수 있었다.

• Transactions of the Korean Society of Mechanical Engineers
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• v.16 no.3
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• pp.569-577
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• 1992

The effect of combustion promotion in a constant volume combustion chamber with sub- chamber located in the vicinity of spark plug, was analyzed for variables such as sub- chamber volume and diameter of orifice, and was also compared and evaluated with that of the chamber with sub-chamber which spark plug was located in the sub-chamber. Consequently, it was shown that decrease of duration of combustion in the latter case was larger than in the former case, but comparing by rate of overall combustion promotion that duration of combustion and pressure were both considered, the optimum configuration factor and the effect of combustion promotion were almost same in both cases.

• Applied Biological Chemistry
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• v.9
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• pp.35-39
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• 1968

Addition of one percent cucumber, as a Kimchi component, showed the stimulation of lactic acid fermentation, by reducing the lagphase, and resulted the early matured Kimchi. Alcohol-soluble fraction from cucumber serum accerelated the growth of Lactobacillus plantarum, p-1, p-2 newly isolated strains from cucumber pickle, but had no effect on the growth rate of Streptococus faecalis. The growth promoting activity was inactivated by dialysis against water and heat treatment at $120^{\circ}C$ for 10 minutes. Softness of cucumber tissues enables to extract easily out a substance, which is thought one of the important factors for the stimulation of me growth of Lactic acid bacteria.

• Applied Biological Chemistry
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• v.27 no.1
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• pp.7-13
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• 1984

The effects of various nutrients added to soy milk on the growth of Lactobacillus acidophilus were investigated. Soy milk was prepared from defatted soy flour and various nutrients such as sugars, growth stimulating agents, amino acid and milk by-products. The growth curve obtained from the experiment suggested that the log phase ended after 12hr. Glucose and fructose greatly enhanced the acid production by L. acidophilus. The optimum concentration of these two sugars in the media was approximately 3% each. Among the tested growth stimulating agents, yeast extract stimulated the acid production by L. acidophilus, and the optimum concentration of this additive was approximately 0.5%. L-methionine reduced the acid production by L. acidophilus. Whey powder and skim mills powder did not significantly stimulated the growth and acid production by L. acidophilus. Concentration of protein in soy milk did not affect the growth and acid production by L. acidophilus.

• Korean Journal of Organic Agriculture
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• v.7 no.1
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• pp.129-135
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• 1998

This study was conducted to clarify the plant growth promoting effects of the various rhizobacteria on the growth of hydroponically grown tomatoes in rockwool, perlite and cocopeat cultures. Strains in terms of $Azospirilham\;sp.(4.5{\times}10^7cells/g),\;Rhodopseudomonas\;sp.(5.8{\times}10^5cells/g),\;Pseudomonas\;sp.(6.1{\times}10^6cells/g$), fusant of $Bacillus\;sp.\;and\;Corynebacterium\;glutamicum(9.1{\times}10^5cells/g$) was bacterialized into the root zone of tomatoes before sowing. Overall growth of tomato plants was promoted by bacterialization of the various rhizobacteria. Strains which showed the highest plan growth promoting effects of hydroponically grown tomatoes was Azospirillum sp., and optimum cultural substrates for the plant growth promotion by rhizobactera were in the order of cocopeat > perlite = rockwool cultures.

• Horticultural Science & Technology
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• v.19 no.1
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• pp.78-80
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• 2001

This experiment was performed to investigate the effects of $GA_3(100mg{\cdot}L^{-1})$, moist-chilling ($3^{\circ}C$) storage (MCS) and removal of funiculus on the germination of Dicentra spectabilis. Seeds which were not treated by $GA_3$ did not germinate in spite of MCS for 90 days. However, $GA_3$ treatment accelerated the seed germination regardless of the duration of MCS. In the case of the funiculus removal, the promoting effect of $GA_3$ showed a tendency to decrease. The germination rate and days to germination were accelerated and shortened respectively with increasing the days of MCS after $GA_3$ treatment. As results, $GA_3$ was effective on the seed germination of Dicentra spectabilis and MCS was synergistic on the effect of $GA_3$.

• Journal of Industrial Convergence
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• v.21 no.1
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• pp.95-102
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• 2023

This study was to identify the factors affecting nurses' use intention of digital healthcare and the moderating effect of clinical career based on the UTAUT model. The items were composed by performance expectancy 3 items, facilitation condition 3tiems, and perceived risk 3 items. CFA was performed to verify the construct validity. As a results, average variance extracted (AVE) was .5 or higher, and construct reliability (CR) was .7 or higher. Model fit was confirmed as CMIN/df=1.797, GFI=.955, CFI=.979, TLI=.968, IFI=.979, and RMSEA=.063. The internal reliability was .93 for performance expectancy, .84 for facilitating conditions, and .64 for perceived risk. Performance expectancy, facilitating condition, and perceived risk had a significant effect on use intention, and clinical career showed a moderating effect(t=-2.159, p=.032). Therefore, in order to enhance the use intention of digital health care, performance expectancy, and facilitating conditions should be raised and perceived risk should be reduced.

• The Korean Journal of Mycology
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• v.43 no.4
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• pp.253-259
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• 2015

Anthracnose caused by Collectotrichum acutatum is the most devastating disease of pepper plants in Korea. In this study, we evaluated the effect of selected antagonistic bacteria on control of anthracnose and plant growth promotion of pepper plants under field conditions. Four different bacterial isolates used in the current study were isolated from the pepper rhizosphere (GJ01, GJ11) and tidal flat (LB01, LB14) in previous studies. Four bacterial isolates, together with a control strain (EXTN-1), showed antifungal activity against C. acutatum in a dual culture assay. To test for plant growth promotion effect, seedling vigor index and growth parameters of pepper were measured under field condition. As a result, all four bacterial isolates were effective for improving plant growth promotion. The strain GJ01 was the most effective in improving the seedling vigor on pepper, but the strain GJ11 in increasing the pepper fruit yield. The incidence of anthracnose was inhibited in the range of 63.2~72.5% by treatment of four bacterial isolates. The current study indicated that the four bacterial isolates could be used as potential biological control agents of anthracnose disease of pepper.

• Electronics and Telecommunications Trends
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• v.32 no.4
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• pp.89-95
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• 2017

영국은 2017년 3월 5G N/W 조기구축을 위한 정부차원의 전략방향 보고서(A 5G Strategy for UK)를 발표하였다. 영국은 5G 인프라가 4차 산업혁명의 촉진제 역할을 할 것이며, 5G로 인한 경제적 파급 효과가 2030년경에 1,980억 파운드 달할 것으로 예상한다. 이러한 전망에 따라 영국 정부는 5G 테스트베드 구축, Small Cell 및 백홀 구축 지원, 주파수 정책방향 제시 등 5G N/W 조기구축 환경을 조성하여 이동통신사의 적극적인 투자를 유인할 계획이다. 아울러 산업계, 학계, 지역정부와 협력하여 다양한 산업분야에서의 5G 활용 방안을 도출하며, 5G 상용화 이전에 해결해야 할 과제를 정비함으로써 영국이 5G 분야에서 글로벌 리더가 되고자 하는 목표를 제시하고 있다. 본고에서는 영국이 4차 산업혁명에 대비하여 제시하는 5G N/W 투자 촉진 전략을 소개하고자 한다.

• Korean Journal of Plant Resources
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• v.1 no.1
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• pp.48-52
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• 1988

In order to examine the effect of growth regulators on flower bud formation and anthesis, various growth regulators were applied during the initiation and growthstages of flower bud development in Camellia. The inhibitor CCC increased flowerbud formation. But gibberellin had a strong suppressing effect of flower budformation while it stimulated elongatien of shoots. On the other hand, gibberellinpromoted the growth of flower buds and hastened anthesis, while other growthregulators had no effect.