• Journal of Korea Foundry Society
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• v.43 no.4
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• pp.210-215
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• 2023

• The Korean Journal of Pesticide Science
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• v.14 no.2
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• pp.138-147
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• 2010

Nematicidal activity against pine wood nematode, Bursaphelenchus xylophilus, was tested in the pot and field by the treatment of microbial formulation after media optimization. The optimized media composition was glycerol 10 g, soybean meal 10 g, NaCl 1 g, $CaCO_3$ 2 g, $K_2HPO_4$ 0.125 g per liter and microbial complex formulation was made with liquid and powder type. Most effective antibiotics against symbiotic microorganism with nematode, kanamycin, was added to the formulation. The control effects against pine wood nematodes were checked by pot test and field test. In the result of treatment by trunk injection, five times treatment was more effective than one time and the treatment with the formulation of concentrated culture supernatant was the most effective in the nematicidal activity showing below 10% mortality in pine tree.

• Journal of the Korean Society of Industry Convergence
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• v.19 no.4
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• pp.185-192
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• 2016

Low operational cost and high efficiency is absolute requirements in the mass production of the ship engine. Increasing the performance of the fuel injection system in the diesel engine is one kind of solution to improve the efficiency. Modern diesel engines are using electronic control module as the main controller in the fuel injection control system, however the mechanical system still involved in the modern control system. In modern ship engine, a control valve was used in injection fuel to regulate the flow of the fuel. High pressure and friction are intensively occur within this part, therefore high wear resist and low friction coefficient material including fine lubricating are needed. This study is to figure out the wear resist material and proper lubricant in the control valve fuel injection. The experiment has been tested using pin on disk in several treatments those are used various lubricants and non-lubricant condition. Two kinds of lubricant were used in this experiment such as INDERIN AW-32 and paraffin oil. INDERIN AW-32 has a better result compared to non-lubricant condition, which are 20% performance increases than non-lubricant condition. SCM 440 was providing small friction coefficient in the lower velocity. The friction coefficient was constantly maintains at 0.1 m/s of velocity or above respectively with the increment of the loads. Using INDERIN AW-32 and paraffin oil the lowest friction coefficient occurred at the lower load, and increases side by side with the increment of loads.

• Journal of the Korean earth science society
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• v.23 no.7
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• pp.597-601
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• 2002

Automatic Weather Systems (AWS) were placed at many educational as well as governmental institutes for the measurement of weather in Korea. However, weather information from AWS was not used as a real time system because of the complexity of the web display. For the web display ;ud automatic store of weather data to be used as a real time system, KNU Weather Now-V1.0 was developed. The system is very simple but useful for students and other users. Thus, everybody can use stored weather data and can process the data easily. This study focuses on the development of the system and the educational usage of AWS.

• The Korean Journal of Pesticide Science
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• v.12 no.1
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• pp.97-101
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• 2008

For the isolation of Actinomycetes showing nematocidal activity against Pine wood nematode, Bursaphelenchus xylophilus, about 2000 culture broth of Actinomycetes were tested and their activity were compared with that of Streptomyces avermitilis resulting a selected strain AW050027. The cultural, morphological and physiological analysis was performed for the identification of a selected strain. Phylogenetic analyses based on 165 rDNA gene sequences showed that the selected strain AW050027 belonged to the genus Micromonospora and M. corioriae $NAR01^T$ was the closest neighbors, sharing 98.9% 165 rDNA gene sequence similarity.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.46 no.3
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• pp.243-252
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• 2020

Using Fervidobacterium islandicum AW-1, polar low molecular weight keratin peptides were produced and confirmed through factors related to the skin elasticity. As a result of confirming the cytotoxicity and collagen synthesis ability according to the concentration of the polar low molecular weight keratin peptide in human fibroblasts, it was confirmed that the cytotoxicity did not appear and the collagen synthesis in human fibroblasts was increased. A mask pack containing a polar low-molecular weight keratin peptide was used, and a test product was used for 4 weeks in 22 healthy women subjects. As a result, it showed statistically significant effects on skin elasticity, skin torsion elasticity, skin color and moisture improvement. Through this test, it was confirmed that the polar low-molecular keratin peptide can be used as a cosmetic ingredient that helps improve skin elasticity.

• Korean Journal of Food Science and Technology
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• v.17 no.2
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• pp.101-106
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• 1985

Dried soymilk residue(SMR) which was prepared by washing with ethanol and acetone, followed by drying at $60^{\circ}C$ was investigated for its sorption characteristics and the relationship between moisture content and water activity when it was mixed with wheat flour. During storage at $20^{\circ}C$ and various RH, an excess sorption phenomena was observed for solvent treated and dried SMR before equilibrium reached. A simple equation of log(dw/dt)=b log t+log a, where t is storage time(hr) and w is %$(H_2O)$ was drived for sorption or desorption rate of dried SMR at RH range of 12%-92%. From sorption isothermifigure, the moisture content(Mi) could be calculated from water activity by the equation of Mi=b Aw+a. The proposed equation was proved to have better fitness than those of the Smith isotherm equation or Lang and Steinberg equation for the mixture of dried SMR and wheat flour.

• Korean Journal of Microbiology
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• v.41 no.1
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• pp.13-17
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• 2005

The aim of this work was to investigate the N-terminal amino acid sequence of catechol 2,3-dioxygenase isolated from Delftia sp. JK-2, which could utilize aniline as sole carbon, nitrogen and energy source. Molecular weight of the enzyme was determined to approximately 35 kDa by SDS-PAGE. N-terminal amino acid sequence of C2,3O from strain JK-2 was $^1MGVMRIGHASLKVMDMDAAVRHYENV^{26}$, and exhibited high sequence similarity with that of C2,3O from Pseudomonas sp., Comamonas sp. JS765, Comamonas test-osteroni, or Burkholderia sp. RP007. Approximately 950-bp C2,3O was obtained through PCR using the primers derived from N-terminal amino acid sequence. Analysis of the DNA sequence revealed that the deduced 296 amino acid sequences were determined, and it showed $100\%$ identity with C2,3O from Pseudomonas sp. AW-2 and $97\%$ similarity with Comamonas sp. JS765.

• Journal of Acupuncture Research
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• v.32 no.2
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• pp.105-121
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• 2015

Objectives : The purpose of this study is to observe the effects of Sa-am acupuncture with tonifications of kidney and urinary bladder on radial pulse in healthy subjects. Methods : Sixty healthy subjects participated in this study, and were divided into a kidney tonifying acupuncture group(KI group), urinary bladder tonifying acupuncture group(BL group) and control group. Radial pulse was measured by 3 dimensional pulse imaging system(DMP-3000) before, immediately after, 30 minutes after, and 60 minutes after acupuncture at Cun, Guan, and Chi in each time. Results : 1. BL group exhibited significantly reduced T1 / T, T4 / T, T4 / (T-T4), T5 / T and increased(T-T4) / T compared to KI group. 2. BL group showed increase of radial augmentation index / heart rate(RAI / HR) in left Cun, H5, Ad / Ap in left Chi, H1, As / Ap in right Chi compared to KI group. BL group showed decrease of As / Ap, Aw / Ap in left Chi, H1, pulse depth, Ad / Ap in right Chi compared to KI group. 3. KI group showed increase of Aw / Ap, H1, H2, H4, pulse area in right Guan, pulse depth in right Chi compared to BL group. KI group showed decrease of RAI in left Cun, applied pressure, pulse depth in left Guan, Aw / Ap in right Chi compared to BL group. Conclusions : The effects of Sa-am acupuncture with tonifications of kidney and urinary bladder in healthy humans have been observed on various parameters. The parameters analysed in this study can be used to differentiate the effects of Sa-am acupuncture with tonifications of kidney and urinary bladder on radial pulse.

• Proceedings of the Korean Vacuum Society Conference
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• 2013.08a
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• pp.177-177
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• 2013

디스플레이 화소 스위치 소자로 수소화된 비정질 실리콘 박막 트랜지스터를 금속 산화물 반도체 박막 트랜지스터(thin film transistor, TFT)로 대체하기 위한 연구가 활발히 진행되고 있다. 금속 산화물 중에서 박막 트랜지스터의 활성층으로 응용이 가능한 가장 대표적인 물질은 인듐(In), 갈륨(Ga), 아연(Zn), 산소(O) 화합물인 InGaZnO이다. InGaZnO TFT의 전기적 특성은 비정질 실리콘보다 우수한 것으로 확인이 되었지만, 소자의 신뢰성은 아직까지 해결해야 할 문제로 남아있다. 본 연구에서는 InGaZnO TFT를 제작하여 게이트 바이어스와 빛을 소자에 동시에 인가했을 때 발생하는 소자의 열화현상을 분석하였다. 다양한 채널 폭과 길이를 갖는 InGaZnO TFT를 제작하고 동시에 활성층의 구조를 두가지로 제작하였다. 첫번째는 활성층의 폭이 소오스/드레인 전극 폭보다 넓은 구조(active wide, AW)이고 두번째는 활성층의 폭이 소오스/드레인 전극 폭보다 좁은 구조(active narrow, AN) 구조이다. 이들 소자에 대해 +20 V의 게이트 바이어스와 빛을 동시에 인가하여 10000초 후의 소자 특성을 초기 특성과 비교하였을 때는 열화가 거의 발생하지 않았다. 반면 -20 V의 게이트 바이어스와 빛을 동시에 인가하여 10000초 후의 소자 특성을 초기 특성과 비교하면 전달특성 곡선이 음의 게이트 전압 방향으로 이동함과 동시에 문턱전압이하의 동작 영역에서 전달특성 곡선의 hump가 발생하였다. 이 hump 특성은 AW 구조의 소자와 AN 구조의 소자에서 나타나는 정도가 다름을 확인하였다. 이러한 열화 현상의 원인으로 음의 게이트 바이어스와 빛이 동시에 인가될 경우 InGaZnO 박막 내에는 활성층 내에 캐리어 밀도를 증가시키는 donor type의 defect가 발생하는 것으로 추정할 수 있었다. 추가적으로 활성층의 테두리 영역에서는 이러한 defect의 발생이 더 많이 발생함을 알 수 있었다. 따라서, 활성층의 테두리 영역이 소오스/드레인 전극과 직접 연결이 되는 AN 구조에서는 hump의 발생정도가 AW 구조보다 더 심하게 발생한 것으로 분석되었다.