• Journal of Korea Foundry Society
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• v.4 no.4
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• pp.30-33
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• 1984

Nitrogen solubility in liquid Fe and Fe-C alloys has been measured by the levitation melting method under 1 atm $N_2$ pressure. Experiments were carried out at the temperature range of $1774-2097^{\circ}K$ and carbon content of 0-5.06wt%. The nitrogen solubilities measured in pure Fe and Fe-C alloys were $log(wt%N)_{Fe}=-424/T-1.129$ and $log(wt%N)_{Fe-C}=-[424/T+1.129+(%C)/19.14{5447/T-0.612}+(%C)^2/19.14$ 2478/T-1.265].

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.2243_2244
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• 2009

본 논문에서는 알루미늄 재질로 된 방열판과 PCB에 1[W]급 LED 14개를 모듈 방열 설계 하여 COMSOL Multiphysics로 시뮬레이션을 통한 결과, 경계면 온도는 약 $80^{\circ}C$, Max.온도$141^{\circ}C$, Min.온도$20^{\circ}C$까지 변화로 실 제작에 근접한 온도 확인이 가능함을 확인 할 수 있었다.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2006.06a
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• pp.225-226
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• 2006

• Korean journal of applied entomology
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• v.29 no.4
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• pp.277-285
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• 1990

Laboratory and field studies were conducted to investigate the initiation and termination factors for pupal diapause in the Oriental tabacco budworm, Heliothis assulta Guenee. Diapause induction was dependent of photoperiod and temperature experienced by 4th and 5th instar larve. One hundred percent of pupal diapause was obtained when larvae were grown at 10L/14D or shorter and $20^{\circ}C$. But at $25^{\circ}C$ the maximum rate of diapause was only about 85% at 8L/16D, the shortest photoperiod tested in this experiment. Adults, eggs or pupae did not respond to diapause-inducing environmental conditions. The critical photoperiod was 12-12.5 hr at $25^{\circ}C$and 14-14.5 hr at $20^{\circ}C$. In the field-collected sample 100% of diapuse rate was observed on Sept. 20 and thereafter in Suwon and middle part of Korea. Cold temperature treatment was not necessary in the termination of pupal diapause, but accelerated adult development.

• Journal of Aquaculture
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• v.14 no.3
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• pp.165-171
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• 2001

Tolerance limits of the adult crab were determined by exposing them to different temperatures (5~2$0^{\circ}C$) and salinities(12~32$\textperthousand$). The tolerance limit for high temperature was determined at 14$^{\circ}C$ and 16$^{\circ}C$ for male and female snow crab, respectively and that for salinity was 21 $\textperthousand$ at 5 $^{\circ}C$. Osmolality concentration, Na$^{+}$ and $K^{+}$ ions in the haemolymph of especially, the females was positively related to the salinity changes. Increased water temperature resulted in a marked decreased in ionic and osmolality concentrations near the limit of tolerance in male, however, such a clear pattern was not apparent for the females. The concentration of glucose in the haemolymph was positively related to water temperature but negatively to salinity.ity.

• Journal of Sericultural and Entomological Science
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• v.14 no.2
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• pp.61-65
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• 1972

The main purpose of this experiment is to select the best combining ability among KC${\times}$N13, and C20${\times}$N13 in view of the cocoon shell weight in Bombyx mori. In the spring of 1972, the author raised silkworms which were born from the crossing of the Chinese strain KC, C14, C20(female) with japanese strain N13 (male). Among each combining of crosses, the heritability of the cocoon shell weight was estimated by the method of variance analysis. The result of the experiment may he summarized as fellow; 1. For KC${\times}$N13 The cocoon shell was heavier than other combining crosses, but its heritability was lower than the others. The heritability of male moth was higher than that of female. 3. For C14${\times}$N13 The cocoon shell and the heritability was in medium value among the combining crosses, and the heritability of female moth was higher than that of male. 3. For C20${\times}$N13 The cocoon shell weigt was lower than the others, but its heritability was higher than that of others. In these combining crosses, C20${\times}$N13 is selected as a new race, which is much better than the commercial one, 103${\times}$104.

• Journal of the Korean Society of Food Science and Nutrition
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• v.43 no.12
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• pp.1889-1895
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• 2014

Radiation-induced hydrocarbon contents of dried anchovy, jiri anchovy, and large-eyed herring were evaluated following electron-beam irradiation at doses of 1, 3, 5, 7, and 10 kGy. GC/MS identification of the induced hydrocarbons by irradiation was conducted after lipid separation by soxtec, followed by florosil column chromatography. 1-Tetradecene ($C_{14:1}$) and pentadecane ($C_{15:0}$) derived from palmitic acid, 1-hexadecene ($C_{16:1}$) and heptadecane ($C_{17:0}$) from stearic acid, and 8-heptadecene ($C_{17:1}$) and 1,7-hexadecadiene ($C_{16:2}$) from oleic acid were the major induced hydrocarbons in irradiated dried anchovy, jiri anchovy, and large-eyed herring samples. At the same irradiation dose, concentration of induced hydrocarbons differed from fatty acid composition and increased in accordance with radiation dose level. Radiation-induced hydrocarbons, such as 1-tetradecene ($C_{14:1}$), 1-hexadecene ($C_{16:2}$), 8-heptadecene ($C_{17:1}$), and 1,7-hexadecadiene ($C_{16:2}$), were confirmed as irradiation marker compounds. Therefore, these marker compounds could be used to distinguish electron-beam irradiated dried anchovy, jiri anchovy, and large-eyed herring from non-irradiated ones.

• Applied Biological Chemistry
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• v.25 no.3
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• pp.126-134
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• 1982

When $^{14}C-2$, 6-Diethylaniline (2, 6-DEA) was incubated aerobically in soil, $^{14}CO_2$ evolved from non-sterile soil A and B was 6.5 and 10.1%, respectively, in the 21st week. Methanol could extract 3.1 and 13.5% of the radioactivity from soil A and B, respectively, 2, 6-Diethylacetanilide was detected as a degradation product in soil. Chaetomium globosum produced 2, 6-diethyl-p-benzoquinone as a degradation product in pure culture. A possible pathway was proposed to include p-hydroxylation of 2, 6-DEA, formation of quinoneimine, and the subsequent hydrolysis with the release of ammonia.

• Environmental Analysis Health and Toxicology
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• v.1 no.1
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• pp.81-86
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• 1986

After oral administration of $^{14}$ C-labelled $N^{G}$-mono[$^{14}$ C-methyl］-L-arginine into rats, 66.3% of the administered radioactivity has been recovered in the urine, and 86.2% of the total of the recovered radioactivity is recovered in the first 24-hr urine. Distributions of the radioactivity of the acidic, basic, and neutral portions and unmetabolized $N^{G}$-monomethyl-L-arginine are 33.3%, 40.2%, 12.5% , and 0.3%, respectively. The radioactivity corresponding N-monomethylurea is about 50% of the neutral portion and 6% of the administered radioactivity.ity.

• Journal of the Korean Society for Heat Treatment
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• v.13 no.4
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• pp.253-258
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• 2000

The present study aimed to develop the TRIP(transformation induced plasticity) aided high strength low carbon steel sheets using reverse transformation process. The cold-rolled 0.14C-6.5Mn steel was reverse-transformed by slow heating to intercritical temperature region and air cooling to room temperature. An excellant combination of tensile strength and elongation of $98.3kgf/mm^2$ and 44.4% appears. This combination comes from TRIP phenomena of retained austenite during deformation. The stability of retained austenite Is very Important for the good ductility and it depends on diffusion of carbon and manganese during reverse transformation. The air cooling after holding at intercritical temperature retards the formation of pearlite and provides the carbon enrichment in retained austenite, resulting the increase of elongation in cold-roiled TRIP steel.