• 한국도로학회논문집
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• 제18권1호
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• pp.57-62
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• 2016

PURPOSES : Reflection cracking has been one of the major causes of distress when asphalt pavement is laid on top of concrete pavement. This study evaluated the reflection cracking resistance of asphalt mixtures reinforced with asphalt embedded glass fiber and carbon fiber using a Texas Transportation Institute (TTI) overlay tester. METHODS : Different asphalt mixtures such as polymer-modified mastic asphalt (PSMA) and a dense graded asphalt mixture were reinforced with asphalt-embedded carbon fiber and glass fiber. For comparison purposes, two PSMA asphalt mixtures and one dense graded asphalt mixture were evaluated without fiber reinforcement. Two different overlay test modes, the repeated overlay test (R-OT) and monotonic overlay test (M-OT), were used to evaluate the reflection cracking resistance of asphalt mixtures at $0^{\circ}C$. In the R-OT test, the number of repeated load when the specimen failed was obtained. In the M-OT test, the tensile strength at the peak load and tensile strain were obtained. RESULTS : As expected, the fiber-reinforced asphalt mixture showed a higher reflection cracking resistance than the conventional nonreinforced asphalt mixtures based on the R-OT test and M-OT test. The dense graded asphalt mixture showed the least reflection cracking resistance and less resistance than the PSMA. CONCLUSIONS : The TTI overlay tester could be used to differentiate the reflection cracking resistance values of asphalt mixtures. Based on the R-OT and M-OT results, the carbon-fiber-reinforced asphalt mixture showed the highest reflection cracking resistance among the nonreinforced asphalt mixtures and glass-fiber-reinforced asphalt mixture.

• 한국동물학회지
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• 제37권1호
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• pp.88-96
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• 1994

고양이의 시상하부내 SON과 PVN에서 VP분비신경원과 OT분비신경원의 형태와 분포를 관찰하기 위해서 면역조직화학적 반응을 시행하였다. 광학 및 전자 현미경적 관찰에 의하면 VP분비신경원과 OT분비신경원의 형태 차이는 없었다. 이들의 형태는 방추형, 타원형 그리고 원형이었으며 크기는 25-40mm으로 나타났다. SON은 시삭위에 능형의 형태로 나타나고 OT분비신경원과 VP분비신경원의 비율은 1:2.4이며 PVN은 제3뇌실을 따라 삼각형 모양으로 나타나고 VP분비신경원과 OT분비신경원의 비율은 1:1.6으로 나타났다 전자현미경적 관찰에 의하면 VP분비신경원과 OT분비신경원에서 과립형질내세망, 사립체, 골지장치, 그리고 미세소관 등이 특히 잘 발달되어 있음을 관찰할 수 있었다.

• Nuclear Engineering and Technology
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• 제35권6호
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• pp.515-522
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• 2003

Tritium behavior in the solid breeder blanket is one of the key factors in determining tritium self-sufficiency, as well as safety, of fusion reactors. Recently, a model has been developed to describe the tritium behavior in solid breeder material, which can predict the tritium release and inventory in the blanket. However, the model has limitation to account for tritium solubility effects, mainly existing as LiOT, especially inside the $Li_{2}O$ solid breeder. In order to improve the capability of predicting the LiOT precipitation in $Li_{2}O$ solid breeder, a new logic is developed and integrated in the existing tritium release and inventory calculation code. With the logic developed in this work, the code can have capabilities to analyze tritium release and inventories in $Li_{2}O$ under steady and transient conditions. It can be found that tritium inventory as LiOT is an important mechanism under pulsed operation, and the amount of inventory becomes higher as the tritium generation rate increases and the temperature decreases. Also, the temperature limits for the generation of LiOT precipitation are determined. Therefore the developed logic helps understand the tritium transport mechanism in $Li_{2}O$ solid breeder.

• 한국농촌생활과학회지
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• 제5권2호
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• pp.207-215
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• 1994

제주도민이 오랫동안 주로 노동복으로 착용해 온 갈옷의 이용 범위를 확대시키기 위하여 현대 감각에 맞는 갈옷의 일상복과 외출복을 고안하여 제작하였다. 또한 감물 염색으로 퇴색된 옷을 재활용하는 방법, 염색방법의 고찰, 감즙 염색에 있어서 재질의 적합성과 다양성 등을 살펴보았다 그 결과 재활용 아동복과 소창을 이용한 개량한복에의 응용은 갈옷 이용 범위의 확대를 시사하였다. 앞으로 갈옷의 단점을 보완할 수 있는 염색법의 간소화와 후처리법의 개발에 연구의 중점을 두면서 갈옷의 장점을 이용하여 용도에 알맞은 디자인을 계속해서 연구, 개발한다면 우리 전통 의상인 갈옷을, 시대에 어울리는 실용적인 의상으로 발전시킬 수 있을 것이다.

• 한국식품위생안전성학회지
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• 제9권4호
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• pp.221-228
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• 1994

The quantitative detection of ochratoxin A (OT-A) in the traditional fermented foods were investigated to develop the analytical procedures, Enzyme-Linked Immunosorbent Assay(ELISA) and Chemiluminescence Immunoassay(CIA). Products used were divided into two groups: the first was the home-made 13 Doenjang, 12 Kanjang, and 14 Gochujang; and the second the traditional commercial products, 17 Deonjang and 11 Kanjang, which collected throughout the country. The standard curve for the quantitative determination of OT-A showed that the sensitivities in ELISA and CIA were upto the level of 20 pg/assay, and that the OT-A recovery rates were appeared to be more than 90%. The residual OT-A in the home-made products were 7.1$\pm$3.7 ng/g for Deonjang, 2.1$\pm$4.1 ng/g Kanjang were found in the traditional commercial products. Residual OT-A in the home-made products was comparatively far less than that of the traditional commercial products. At heat stability test of OT-A in the traditional fermented foods was found to be stable even at 121$^{\circ}C$ for 120 min.

• 복식
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• 제54권6호
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• pp.53-64
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• 2004

North Korea's traditional dress(chosun-ot) has developed as follows: right after the liberation(l945). North Korea tried to get rid of Japanese style and empty formalities and vanity, so chosun-ot became simple and practical. And from the Korean war to 1950's North Korea had tried to establish through a restoration of the war and chosun-ot is more easy and simple. For 1960's People became to be interested in their clothes owing to a stable socialistic economy and politics, and tried new style due to the influence of the Korea-Japanese. Since 1972 North Korea has claimed a dictational socialist organization, and constructed its own culture. Therefore North Korea emphasized its own clothing habit. and its garment style developed differently from South Korea. Since 1984 North Korea tried to change its policy dramatically. and chosun-ot has changed to a modern and various style. But on the other hand, traditional style of chosun-ot was more emphasized. North Korea especially tried to succeed its traditional style. it pursued only partial changes by sticking to its original style. And its color to bright and magnificent one with additional ornaments. Because it tried to change the style within the limits of its tradition, traditional dress has a quite fragmentary and flat appearance.

• Corrosion Science and Technology
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• 제16권1호
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• pp.8-14
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• 2017

The corrosion behavior of a ferritic/martensitic steel T91 exposed to an aqueous solution containing chloride and sulfate ions is investigated depending on the stimulated all-volatile treatment (AVT) and under oxygenated treatment (OT) conditions. The corrosion of T91 steel under OT condition is severe, while the corrosion under AVT condition is not. The co-existence of chloride and sulfate ions has antagonistic effect on the corrosion of T91 steel in both AVT and OT conditions. Unlike to corrosion resistance in the aqueous solution, OT pretreatment provides T91 steel lower oxidation-resistance than VAT pretreatment. From scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS) and X-ray diffraction (XRD) analysis, the lower corrosion resistance in the aqueous solution by VAT conditions possibly is due to the formation of pits. In addition, the lower oxidation resistance of T91 steel pretreated by OT conditions is explained as follows: the cracks formed during the immersion under OT conditions accelerated peeling-off rate of the oxide film.

• The Korean Journal of Physiology
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• 제21권1호
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• pp.35-46
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• 1987

It has been well known that estrogens stimulate the uterine contractility and progestins inhibit it. Then, one may expect that the uterine contractility and sensitivities to oxytocin (OT) and prostaglandin $F_{2{\alpha}}\;(PGF_{2{\alpha}})$ would be different among the estrus cycle. These hypotheses were tested using the mature female rat. Spontaneous isometric contractions of isolated uterine strips $(1{\times}0.3\;cm)$ from cyclic rats in various stages of the estrus cycle, bilateral ovarectomized rats and hypophysectomized rats were recorded in absence or presence with $estradiol-17{\beta}\;(E_2)$, progesterone $(P_4)$, OT and $PGF_{2{\alpha}}$. The results were summarized as follows: 1) The spontaneous uterine contractile force was the highest in the estrus rat and the lowest in the ovarectomized or the hypophysectomized rat. In the proestrus rat, the contractile frequency was the lowest (2.7 beats/10 min) and the contractile duration was the longest (70 sec). In the other groups, there were no any differencies in frequency (9 beats/10 min) and in duration (30 sec). 2) OT and $PGF_{2{\alpha}}$ stimulated the uterine contractility in all groups tested except in the hypophysectomized rat in which OT failed to stimulate the uterine contraction. $PGF_{2{\alpha}}$ was more effective in stimulating the uterine contraction than OT in all groups tested except in the estrus rat. OT-induced contraction was the highest in the estrus rat and $PGF_{2{\alpha}}-induced$ contraction was the lowest in the hypophysectomized rat. 3) Uterine contractilities were not changed by the in vitro treatments of $E_2$ or $P_4$ under the influence of endogenous steroids, however, $E_2$ and $P_4$ stimulated the uterine contraction in the ovarectomized rat in which endogenous steroids were almost abolished. 4) Increased uterine contraction by the treatment of OT was suppressed by in vitro $E_2$ or $P_4$ in the estrus rat, while it was potentiated by the $P_4$ in the proestrus rat. In other groups, exogenous $E_2$ or $P_4$ did not affect the OT-induced uterine contraction. 5) $PGF_{2{\alpha}}-induced$ uterine contraction was suppressed in the ovarectomized rat by $E_2$ and $P_4$, in the diestrus and proestrus rats by $P_4$ and in the hypophysectomized rat by $E_2$. In other groups, exogenous $E_2$ or $P_4$ was ineffective in altering the $PGF_{2{\alpha}}-induced$ uterine contraction. According to the above results, it may conclude that the mechanisms of the different uterine contractility and the different uterine sensitivity to OT or $PGF_{2{\alpha}}$ according to the estrus cycle are not explicable with only the serum concentrations of steroids, OT and $PGF_{2{\alpha}}$ but also other unknown factors.

• 한국식품과학회지
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• 제29권1호
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• pp.26-31
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• 1997

물을 극미량 함유하는 미수계 효소반응계인 aerosol-OT/이소옥탄으로 구성된 역미셀계내에서 레시친의 일종인 DPPC (dipalmitoyl phosphatidylcholine)의 가수분해반응을 phospholipase $A_2$가 촉매할 수 있었다. 또한 phospholipase $A_2$에 의한 가수분해반응을 정량분석하기 위한 고성능 액체 크로마토그래피에 의한 예민하고 간편한 방법을 고안하였는 바, 이에 의하여 aerosol-OT/이소옥탄 역미셀계내에서 phospholipase $A_2$에 의한 가수분해반응의 동력학적인 분석이 가능하였다. 한편, 여러가지 유화제와 유기용매 중 aerosol-OT와 이소옥탄일 때 효소반응이 가장 효과적이었으며, 반응 적정온도는 $35{\sim}40^{\circ}C$, 적정 pH는 7.0이었다. 또한 역미셀계내에서의 가수분해반응은 수분 함량변화에 민감하였으며, R-값(=[water]/[aerosol-OT])이 10.0일 때 가장 높은 효소활성을 나타내었다. 효소반응을 위한 최적조건하에서의 $K_{m,app.}$ 및 $V_{max.,app.}$는 각각 8.73 mM, 2.83 units/㎎ protein이었으며, 역미셀계내에서 phospholipase $A_2$에 의한 DPPC가수분해반응의 활성화에너지는 12.31 kcal/mole로 산출되었다.

• Clinical and Experimental Reproductive Medicine
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• 제45권2호
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• pp.94-99
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• 2018

Objective: Prompt diagnosis and management are essential for saving the adnexal organs from infarction in cases of ovarian torsion (OT). This study aimed to determine the diagnostic significance of signal peptide, complement C1r/C1s, Uegf, and Bmp1 (CUB), and epidermal growth factor-like domain-containing protein-1 (SCUBE-1) levels in cases of OT, an emergent ischemic condition, and the relationship of SCUBE-1 with oxidative stress parameters. Methods: This prospective study was conducted among 15 OT patients and 20 age- and gravidity-matched healthy women. SCUBE-1 serum concentrations were determined by using enzyme-linked immunosorbent assays. In addition, oxidative stress was evaluated by measuring the serum levels of advanced oxidation protein products (AOPP), ferric reducing ability of plasma (FRAP), and glutathione (GSH). Results: The SCUBE-1 titers were significantly higher in the patients with OT than in the controls (p=0.008). In addition, serum FRAP and GSH levels were significantly lower in the OT patients than in the controls (p<0.001 for both). Serum AOPP levels were higher in the OT patients, but this trend was not statistically significant (p>0.05). Furthermore, there were no correlations between SCUBE-1 levels and age, gravidity, parity, cyst size, and AOPP, FRAP, or GSH levels (p>0.05). Conclusion: We believe that SCUBE-1 may be a promising biomarker for the early diagnosis of OT.