• Applied Science and Convergence Technology
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• v.24 no.6
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• pp.254-256
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• 2015

Effect of growth temperature ($T_g$) on the structural and optical properties of $In_{0.5}Ga_{0.5}As$ atomic layer epitaxial (ALE) quantum dots (QDs) is investigated in the range of $T_g=480-510^{\circ}C$. $In_{0.5}Ga_{0.5}As$ ALE QDs consist of 5 periods of short-period superlattices (SPSs) of 1 monolayer-thick InAs and GaAs. Number of coalescent QDs decreases as $T_g$ increases, and they disappear at $T_g=510^{\circ}C$. As $T_g$ increases in the range of $480-495^{\circ}C$, sizes of QDs increase, and densities of QDs decrease due to merge of QDs. On the contrary, although sizes of QDs are maintained at $T_g=495-510^{\circ}C$, densities of QDs decrease. This is attributed to the desorption of material-mainly indium-during the growth interruption. This conjecture is supported by the optical properties of the QDs as a function of $T_g$. As a result, we propose that optimum growth temperature of the QD is $495^{\circ}C$ with less repetition of SPSs than 5.

• Food Science of Animal Resources
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• v.29 no.2
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• pp.188-193
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• 2009

This study was conducted to determine the effect of mugwort powder on meat composition and sensory characteristics in finishing gilts $(LY{\times}D)$. Twenty pigs (75kg) were randomly allotted to four treatments. Mugwort powder was added to final concentrations of 0(C), 0.5(T1), 1.0(T2), and 1.5%(T3) in the basal diet. Pigs were fed with the specified diet for 50 days. Carcass characteristics and cooking loss were not significantly affected by mugwort powder supplementation. The WHC and cooking loss of T2 and T3 were not significantly different than the control. However, the pH values for meat from gilts fed the T1 and T3 diets were significantly lower than the control (p<0.05). Shear force values of fresh meat were highest with the T3 diet (p<0.05), while the shear force values of cooked meat were significantly lower than the control with the T2 and T3 diets. Texture values of hardness, brittleness, gumminess, chewiness, and adhesiveness were significantly higher with the T3 diet (p<0.05), however values for cohesiveness and springiness were not significantly affected by mugwort powder supplementation. These results indicate that the feeding of mugwort powder improves the shear force of cooked meat from gilts fed the T3 diet, however the carcass, WHC and cooking loss characteristics in gilts are not affected by mugwort powder supplementation.

• Food Science of Animal Resources
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• v.24 no.2
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• pp.189-197
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• 2004

This study investigated the effect of belly fat on the plasma lipid concentrations in rats. The results were obtained from the rats that had been fed the experimental purified diets containing 5％ corn oil (C) as the control, 5％ commercial lard (Tl), 5％ belly fat (T2), 10％ belly fat(T3), and those given diet(T4) by feeding either C or T3 alternately every 3 days for 30 days. The food intake and food efficiency were not show any significant difference among the treatments. The body weight gain tended to significantly increased when the feeding of added-belly fat in diets (p＜0.05). The plasma triacylglycerides of T3 was higher than the other treatments, and significantly elevated as the number of feeding days of the diets with the belly fat passed when compared to diet C (p＜0.05). The plasma total cholesterol of T3 showed the highest levels in the treatment groups, and was high in the order of T1, T2, T4, and there was a significant difference between the rats given the diet with belly fat and C (p＜0.05). The plasma HDL-C of T2 and T3 was showed the lowest levels in the treatment groups. The plasma HDL-C of T1, T2, T3 and T4 groups were significantly decreased as the number of feeding days of the diets with the belly fat increased when compared to diet C (p＜0.05). The plasma LDL-C and Al of T3 showed the highest levels in the treatment groups, and the levels were in order of T1, T2, T4. There was a significant difference between the groups of rats given the belly fat and C (p＜0.05). The bleeding times significantly decreased as the number of feeding days of the belly fat diets increased, and T3 showed the lowest levels, there was a significant difference among the treatment groups (p＜0.05). The whole blood clotting times of T3 showed the lowest values, and significantly decreased according to the number of days of the rats were fed the belly fat diet (p＜0.05). These results showed that frequent consumption and high intake of pork belly can elevate the plasma triacylglyceride and cholesterol levels, and also accelerate red thrombus formation because belly fat contains high levels of saturated fatty acids and cholesterol.

• Bulletin of the Korean Chemical Society
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• v.31 no.4
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• pp.929-933
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• 2010

A new compound, 4-methoxyl 5-hydroxymethyl benzoic 3-O-$\beta$-D-glucopyranoside (1), has been isolated from the leaves and stems of Acer mandshuricum, along with nine known compounds (2-10). Their structures were determined by a variety of spectroscopic analyses. The effect of compounds 1-10 on the function of osteoblastic MC3T3-E1 cells was examined by determining alkaline phosphatase (ALP) activity, collagen synthesis, and mineralization. Compound 1 significantly increased the function of osteoblastic MC3T3-E1 cells; $5.0\;{\mu}M$ of 1 increased ALP activity, collagen synthesis, and mineralization of MC3T3-E1 cells to 114.7, 119.5, and 108.2% (P < 0.05) of the basal value, respectively. In addition, compounds 2-10 also potently increased the function of osteoblastic MC3T3-E1 cells.

• Korean Journal of Poultry Science
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• v.30 no.1
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• pp.49-54
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• 2003

This study was carried out to investigate the effects of the inoculated diet with Paecilomyces japonica on weight gain, feed efficiency and cordycepin contents in the breast and thigh meats of broilers. One hundred and twenty broiler chicks were divided into four dietary groups ; 1) control (basal diet), 2) T1 (substituted with 5% inoculated diet), 3) T2 (substituted with 10% inoculated diet) 4) T3 (substituted with 20% inoculated diet) during 4 weeks. Cordycepin contents of inoculated diet with Pacilomyces japonica was significantly higher than before inoculation (P<0.05). Body weight gain and feed efficiency were highest in T1 group when fed starter diet (P<0.05) but these were lowest in T3 group fed when fed finished diet (P<0.05). Body weight gain and feed efficiency were the lowest in T2 group for overall period than other groups. Cordycepin contents of breast and thigh meats were significantly higher in Pacilomyces japonica groups than control at 5 weeks of age (P<0.05). However, it was similar among the T1, T2 and T3 groups. These results indicated that body weight gain and feed efficiency tended to increase in birds fed replaced 5% inoculation diet Cordycepin contents of breast and thigh meats would be increased significantly in birds fed inoculated diet (P<0.05).

• Korean Journal of Agricultural Science
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• v.5 no.2
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• pp.80-86
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• 1978

This study was carried out in order to know the effect of T. T. C. reaction on antibiotics, cleanser, disinfectants, pH, acidity and station of culture a bacterial Streptococcus thermophilus was used to 2.3.5-triphenyl tetrazolium chloride reduction test for the detection of residual antibiotics in milk were tested. The results obtained were summarized as follows. 1. The T. T. C. reaction was most sensitive in the group of penicillin as 0.02~0.05 IU and also it was less sensitive in Streptomycin and various broad antibiotics except Vibramycin, Synthomycin and Teramycin but it was least sensitive in Streptomycin group. 2. For ther T. T. C. reaction test on cleanser, the positive reaction was appeared above 0.7% of Hi-Ti and 0.1% of NaOH solution respectively. 3. For the T. T. C. test reaction on disinfectants, the positive reaction was occured on 200~500 ppm solution of sodium-hypochlorite and chloride-lime, 0.15~0.35% solution of phenol, cresol and Iode-K. 4. The optimum temperature was $35{\sim}37^{\circ}C$ and proper culturing time was 12 to 18 hours for propagation culturing. 5. The suspect positive reaction was tested above pH 5.0 and the positive reaction was appeared above 0.21% of acidity.

• The Korean Journal of Nuclear Medicine
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• v.30 no.4
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• pp.507-515
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• 1996

Background : Potassium channel opener (K-opener) opens ATP-sensitive K'-channel located at cell membrane and induces potassium efflux from cytosol, resulting in intracellular hyperpolarization. Newly synthesized K-opener is currently examined for pharmacologic potency by means of rubidium release test from smooth muscle strip pre-incubated with Rb-86. Since in-vivo behavior of thallium is similar to that of rubidium, we hypothesized that K-opener can alter T1-201 kinetics in vivo. Purpose : This study was prepared to investigate the effects of pinacidil (one of potent K-openers) on the T1-201 uptake and clearance in cultured myocyte, and in-vivo biodistribution in mice. Methods : Spontaneous contracting myocytes were prepared to imitate in-vivo condition from 20 hearts of 3-5 days old Sprague-Dawley rat and cultured for 3-5 days before use ($5{\times}10^5$ cells/ml). Pinacidil was dissolved in 10% DMSO solution at a final concentration of 100nM or l0uM and was co-incubated with T1-201 in HBSS buffer for 20-min to evaluate its effect on cellular T1-uptake, or challenged to cell preparation pre-incubated with T1-201 for washout study. Two, 40 or $100{\mu}g$ of pinacidil was injected intravenously into ICR mice at 10 min after $5{\mu}Ci$ T1-201 injection, and organ uptake and whole body retention rate were measured at different time points. Results : Co-incubation of pinacidil with T1-201 resulted in a decrease in T1-201 uptake into cultured myocyte by 1.6 to 2.5 times, depending on pinacidil concentration and activity of T1-201 used. Pinacidil enhanced T1-201 washout by 1.6-3.1 times from myocyte preparations pre-incubated with T1-201. Pinacidil treatment appears to be resulted in mild decreases in blood and liver activity in normal mice, in contrast, renal and cardiac uptake were mildly decreased in a dose dependent manner. Whole body retention ratios of T1-201 were lower at 24 hour after injection with $100{\mu}g$ of pinacidil than control. Conclusion : These results suggest that treatment with K-opener may affect the interpretation of T1-201 myocardial images, due to decreasing thallium accumulation and enhancing washout from myocardium.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2006.05a
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• pp.142-145
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• 2006

본 연구는 도축 후 24시간 냉각된 지육에서 등심 부위를 채취하여 $5{\times}15{\times}5cm$ 크기로 잘라 양념액과 육을 1:1로 혼합하여 $1{\pm}1^{\circ}C$에서 28일간 숙성시키면서 저장성을 분석한 결과는 다음과 같다. pH는 T1이 다른 처리구에 비해 월등히 낮은 pH를 나타내었으며 저장기간에 따른 pH의 변화는 나타나지 않았다. 전단가는 T2와 T3는 전 숙성기간 동안 전단가가 감소한 반면 T1은 숙성기간이 증가함에 따라 전단가는 증가하였고 보수력은 T1이 숙성 1일부터 낮은 보수력을 나타내었으며, 모든 처리구에서 숙성기간에 따라 보수력이 다소 감소하였다. 근원섬유 소편화지수는 숙성 1일 다소 낮게 나타났던 T3구가 숙성 기간이 증가하면서 높은 값을 나타낸 반면 T1은 전 숙성기간 동안 다른 처리구에 비해 가장 낮은 소편화도를 나타내었다.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2005.05a
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• pp.183-186
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• 2005

본 연구는 도축 후 24시간 냉각된 지육에서 등심부위를 채취하여 $5{\times}\;15{\times}\;5cm$ 크기로 잘라 양념액과 육을 1:1로 혼합하여 $1{\pm}\;1^{\circ}C$에서 28일간 숙성시키면서 저장성을 분석한 결과는 다음과 같다. pH는 T1이 다른 처리구에 비해 월등히 낮은 pH를 나타내었으며 저장기간에 따른 pH의 변화는 나타나지 않았다. 전단가는 T2와 T3는 전 숙성기간 동안 전단가가 감소한 반면 T1은 숙성기간이 증가함에 따라 전단가는 증가하였고 보수력은 T1이 숙성 1일부터 낮은 보수력을 나타내었으며, 모든 처리구에서 숙성기간에 따라 보수력이 다소 감소하였다. 근원섬유소편화지수는 숙성 1일 다소 낮게 나타났던 T3구가 숙성 기간이 증가하면서 높은 값을 나타낸 반면 T1은 전 숙성기간 동안 다른 처리구에 비해 가장 낮은 소편화도를 나타내었다.

• Korean Journal of Food Science and Technology
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• v.32 no.6
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• pp.1285-1290
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• 2000

The objective of this study was to evaluate the characteristics on the thermal denaturation of free drip released from pork loin during chilled storage using DSC (differential scanning calorimetry) with pH, concentration of NaCl and phosphate. The increasing of pH stabilized the heat resistance of the proteins in drip. A $T_1$ greatly increased of $T_{max}$ by $6.33^{\circ}C$ incline from pH 5.5 to 6.5. And increasing the concentration of NaCl destabilized the heat resistance of drip. $T_1$ showed the greatest reduction of $T_{max}\;(9.41^{\circ}C)$ in the presence of 5% NaCl. The presence of STPP (Sodium Tripolyphosphate) enchanced the thermal stability of pork drip by $5.84^{\circ}C$ in the presence of 0.5% STPP. As temperature increased from 40 to $100^{\circ}C$, lightness $(L^*)$ increased from 41.1 to 69.5, while redness $(a^*)$ decreased from 26.70 to 5.40. Particularly, both values of $L^*-$ and $a^*-$ greatly changed by 78% from 40 to $60^{\circ}C$.