• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.14 no.12
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• pp.1027-1031
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• 2001

A new constant growth technique to conserve an initial grating height of V-groove AlGaAs/InGaAs quantum nanostructures above 1.0 $\mu\textrm{m}$ thickness has been successfully embodied on submicron gratings using low pressure metalorganic chemical vapor deposition. A GaAs buffer prior to an AlGaAs barrier layer on submicron gratings plays an important role in overcoming mass transport effects and improving the uniformity of gratings. Transmission electron microscopy (TEM) image shows that high-density V-groove InGaAs quantum wires (QWRs) are well confined at the bottom of gratings. The photoluminescence (PL) peak of the InGaAs QWRs is observed in the temperature range from 10 to 280 K with a relatively narrow full width at half maximum less than 40 meV at room temperature PL. The constant growth technique is an important step to realize complex optoelectronic devices such as one-step grown distributed feedback lasers and two-dimensional photonic crystal.

• Korean Journal of Organic Agriculture
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• v.19 no.spc
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• pp.234-237
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• 2011

This study was carried out to investigate the effect of soil covering materials such as rice bran, rice hull and saw dust on garlic growth through a field experiment in wintertime. Rice bran was the smallest in term of particle size, but it recorded the highest level of bulk density. The missing plant rate after winter season was relatively high, 59.3%, and that of soil covering materials stood at the low level of 10%. Other growth factors recorded the highest level during application of rice bran. In terms of chemical properties of soil-covering materials, rice bran recorded the highest level of 1.84, 2.34 and 0.16% in the content of N, P, and K, respectively. The subsoil temperature was higher by application of rice bran as compared to that of other materials which stood at the lowest temperature ($-9^{\circ}C$).

• Journal of Bio-Environment Control
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• v.20 no.4
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• pp.326-332
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• 2011

The growth and bolting characteristics of spring Chinese cabbage cultivars at two night-time temperature treatments such as $5^{\circ}C$ and $10^{\circ}C$ during seedling stage were investigated to establish a safe environmental management strategy for raising seedlings. The low night-time temperature treatments were applied at 5, 10, and 15 days after sawing and the treatment durations were 5, 10, and 15 days in each of treatment beginning. The growth of seedlings in all the tested cultivars were linearly reduced as the treatment duration was extended and no symptoms of bolting were found. The reduction rate in seedling growth of 'Chunkwang' reached to 59.3% at most by 15 days of $5^{\circ}C$ treatment when it be compared to that of control. However, no symptoms of bolting were shown in the treatments of two night-time temperatures until the harvest at 90 days after sawing, indicating that the vernalization effect by low night-time temperature could be mitigated by subsequent day-time optimal temperature management. This study showed that the major spring Chinese cabbage cultivars require more ultimate level of low night-time temperature treatment for the vernalization than this study. It is also supposed that the optimal day-time temperature management can reduce or delay the rate of bolting, even if the seedlings were exposed to short-term low temperature below $5^{\circ}C$ during night-time.

• Journal of Sericultural and Entomological Science
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• v.33 no.2
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• pp.68-71
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• 1991

Mulberry cuttings from shoots of Shinkwangppong(Morus bombycis koidz.) had been callused in vermiculite separately at 15, 20, 25 and 30$^{\circ}C$ for 15 days before transplanting them in greenhouse to make clear the effect of temperature on root formation and growth is as follow. The buds of cuttings started sprouting in 4 and 6 days of callusing at 30 and 25$^{\circ}C$, respectively, reaching 100% budding in 10 and 15 days of callusing. Budding was delayed, however, at low temperature, showing 86% and 92% at 15 and 20$^{\circ}C$, respectively, in 15 days. Rooting from the cuttings was also accelerated at high temperature, showing 97-100% rooting at 25$^{\circ}C$ and 30$^{\circ}C$, in 15 days of callusing but no more than 93% at low temperature even in 35 days. Although high temperature increased root number and length after 15 days in callusing, no differences showed in the number and the weight at more than 20$^{\circ}C$ in 35 days of cuttings.

• Food Science and Preservation
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• v.11 no.2
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• pp.246-249
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• 2004

This study was conducted to evaluate the inhibition efficacy of high CO$_2$ atmosphere (35, 60, and 100% ${\times}$ 24, 48, and 72 h) on growth of Botrytis cinerea in vitro in order to offer sterilizing method of horticultural crops including peach fruits. Botrytis cinerea was isolated from a naturally infected peach fruits. Growth of the fungus at 25$^{\circ}C$ declined with increased CO$_2$ concentration and treatment duration. Especially, 100% CO$_2$ provided completely inhibition effect of growth of the fungus for 72 h. After removal of high CO$_2$ condition, however, the fungus showed normal growth speed. The growth of fungus at low temperature was completely inhibited temporarily by short-term 100% CO$_2$ treatment, but resumed right after transferring to normal atmosphere at 25$^{\circ}C$.

• Journal of the Korean Vacuum Society
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• v.4 no.S1
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• pp.1-6
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• 1995

Polycrystalline Si films have been used in many applications such as thin film transistors(TFT), image sensors and LSI applications. In this research deposition of Si films at low temperatures with remote plasma enhanced CVD from Si2H6-SiF4-H2 on SiO2 was studied and their crystallinity was investigated. It was condluded that growth of crystalline Si films was favorable with (1) low Si2H6 flow rates, (2) moderate plasma power, (3) moderate SiF4 flow rates, (4) moderate substrate temperature, and (5) suitable method of surface cleaning.

• Journal of Environmental Science International
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• v.11 no.12
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• pp.1307-1313
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• 2002

This study was performed to investigate the single and combined effect of concentrations of garlic juice according to the pH and temperature on the growth of Salmonella enteritidis in brain heart infusion broth, and to develope Response surface model for the effect of concentrations of garlic extract. The results of electric conductibility of Salmonella enteritidis growing in the range of incubation temperature ($25~42^{\circ}C$), pH (5.5~9.0) and concentration of garlic Juice (0~0.8%) showed that a badge with high temperature had low D.T.value and concentration of garlic extract were significantly correlated with D.T.value (p<0.01). Growth of Salmonella enteritidis in the condition of $37^{\circ}C$ and pH 7.0 presented the lowest D.T.value.

• Journal of the Korean Society for Heat Treatment
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• v.10 no.4
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• pp.266-277
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• 1997

Near-threshold fatigue crack growth characteristics was investigated on the Ni-Cr-Mo-V low alloy steel, which has the different microstructure obtained by tempering at various temperature. The specimens were austenized at $950^{\circ}C$ and then followed by tempering at $200^{\circ}C$, $530^{\circ}C$ and $600^{\circ}C$. Strain rate was obtained from strain gauge attached on the crack tip and crack opening point was observed through load-strain curve. Threshold stress intensity range(${\Delta}K_{th}$) was increased with increasing tempering tempuerature, but the effective threshold stress intensity rage (${\Delta}K_{eff,\;th}$) was not affected with the increasing temperature. Grain size increased with increasing tempering temperature.

• Journal of The Korean Society of Grassland and Forage Science
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• v.6 no.3
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• pp.179-184
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• 1986

The pot trial was carried out to investigate the influence of soil temperature on the growth and dry matter accumulation in sorghum cv. Pioneer 931 and corn cv. Suweon 19 during their growing season in 1985. Soil temperature maintained with low ($22.3^{\circ}C$), natural($25.9^{\circ}C$) and high temperature($30.5^{\circ}C$) over 24 hour. The results are summarized as follows; 1. Growth of sorghum plants was associated with increasing of soil temperature, while that of corn was reduced under high temperature($30.5^{\circ}C$). The highest plant height of corn was found at natural temperature($25.9^{\circ}C$). Sorghum had higher growth rate than corn plants in all temperature levels. 2. Assimirable leaf areas of the plants were greately increased under high temperature both in sorghum and corn. Sorghum plants maintained almost same levels of leaf area during maturity stage, but those of corn were markedly decreased after mild stage. 3. The highest rates of photosynthesis were found at nature' soil temperature ($25.9^{\circ}C$) both in sorghum($1.619mg/s/m^2$) and corn plants($1.084mg/s/m^2$). Under high temperature($30.5^{\circ}C$) the photosynthesis rates of the plants were decreased to about 1.553 mg and 0.404 mg for sorghum and corn, respectively. Low temperature ($22.3^{\circ}C$) produced only a value of 0.775 mg for sorghum and 0.048 mg for corn. 4. Seasonal dry matter accumulation of sorghum increased in the order of high>natural>low soil temperature, but that of corn increased in the order of natural>high>low soil temperature, respectively.

• Archives of Plastic Surgery
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• v.32 no.2
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• pp.149-154
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• 2005

Low-power laser(LPL) delivers a small amount of energy without elevation of tissue temperature. LPL has been reported to have biostimulation effects including anti-inflammatory, analgesic, regenerative, immunocorrective, and vasodilative effects. However, the effect of LPL on hair growth has rarely been studied. We investigated the effect of LPL on hair growth in the mouse. After depilation of back skin of mice, we classified the mice into 4 groups: control, laser irradiated group, $MoandMore^{(R)}$ applied group, and Spella $707^{(R)}$ applied group. Laser irradiation or application of these drugs were performed on the back skin of the mice for 30 days. The results are summarized as follows. Hair growth of control was first observed at 13 days after depilation, and complete hair regrowth was observed at 25 days. Hair growth of both laser irradiation group and $MoandMore^{(R)}$ applied group was first observed at 9 days after depilation, and complete hair regrowth was observed at 20 days. Hair growth of Spella $707^{(R)}$ applied group was firstly observed at the 9 days after depilation, and complete hair regrowth was observed at the 15 days. Hair growth started at the irradiation site in the laser irradiation group, but it started at the random sites in other groups. In conclusion LPL irradiation have a stimulating effect on the hair growth in the mouse.