• Journal of the Korean Society of Radiology
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• v.4 no.2
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• pp.21-25
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• 2010

Recently, various semiconductor compounds as radiation detection material have been researched for a diagnostic x-ray detector application. In this paper, we have fabricated the CdS detecton sensor that has good photosensitivity and high x-ray absorption efficiency among other semiconductor compounds, and evaluated the application feasibility by investigating the detection properties about energy range of diagnostic x-ray generator. We have fabricated the line voltage selector(LCV) for a signal acquisition and quantities of CdS sensor, and designed the voltage detection circuit and rectifying circuit. Also, we have used a relative relation algorithm according to x-ray exposure condition, and fabricated the interface board with DAC controller. Performance evaluation was investigated by data processing using ANOVA program from voltage profile characteristics according to resistive change obtained by a tube voltage, tube current, and exposure time that is a exposure condition of x-ray generator. From experimental results, an error rates were reduced according to increasing of a tube voltage and tube current, and a good properties of 6%(at 90 kVp) and 0.4%(at 320 mA) ere showed. and coefficient of determination was 0.98 with relative relation of 1:1. The error rate according to x-ray exposure time showed exponential reduction because of delayed response velocity of CdS material, and the error rate has 2.3% at 320 msec. Finally, the error rate according to x-ray dose is below 10%, and a high relative relation was showed with coefficient of determination of 0.9898.

• Journal of Plant Biotechnology
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• v.41 no.4
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• pp.216-222
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• 2014

This study was carried out to develop an efficient transformation protocol via particle bombardment with PLBs (protocorm-like bodies) in Phalaenopsis. To achieve this aim, osmoticum treatment and an increasing shooting chances in particle bombardment process were applied for this study. In addition, pCAMBIA3301: ORE7 vector which contains a herbicide-resistance bar gene as a selectable marker and ORE7 gene as a gene of interests were employed. With regard to the increasing chances of shooting in particle bombardment, double shooting was the best results with 1.5 ~ 2.5 times higher than those of a single or triple shooting treatment in the productioon of PPT (D-L-phosphinothricin)-resistant PLBs. However, regeneration rate of shoots in double shooting was not high as a single shooting. Further, double shooting showed 35 ~ 40% higher than that of a single shooting in the frequency of browning. Regarding effects of different osmotic treatments, combination of 0.2 M sorbitol with 0.2 M mannitol showed the best results in transformation efficiency, regeneration of transformants and reduction of browning. Putative transgenic Phalaenopsis plants were analyzed by PCR analysis and confirmed the presence of bar and ORE 7 gene. Also, real-time PCR was conducted by using 21 transgenic plants and showed only 4 plants had one copy of transgene; whereas, the other 17 plants had more than 2 copies of transgene. Transgenic phalaenopsis plants produced in this study were transferred to pots and flowered normally without morphological variations in flower and leaf.

• Horticultural Science & Technology
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• v.31 no.1
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• pp.123-127
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• 2013

A new spray chrysanthemum (Dendranthema grandiflorum) 'Blue Hope' was bred by the Flower Research Institute, Gyeongsangnam-do Agricultural Research & Extension Services in 2009. The cultivar 'Blue Hope' was initially derived from the cross in 2005 between 'Ford', a spray chrysanthemum cultivar, with white anemone type, and 'Chopin', a spray chrysanthemum cultivar with white anemone type. The cultivar has anemone type with white petals. After the evaluation of the characteristics under shade culture in summer and retarding culture in spring and consecutive selection from 2007 to 2009, 'Blue Hope' was selected finality. The natural flowering time of 'Blue Hope' was October 24th, and year-round flowering is possible by shading or lighting treatment. The growth of plant was very vigorous and response time 6.5 weeks. The diameter of flower was 4.9 cm. Number of flowers per stem was 19.1 in autumn. Days to flowering under the short day treatment was about 45 in spring and its vase life was 23.8 days in the autumn season. This cultivar was resistance white rust and consumer's preference of new spray is high level than the control.

• Horticultural Science & Technology
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• v.31 no.1
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• pp.1-7
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• 2013

In this study, the resistance to ozone and characteristics of ozone-induced damage were investigated on the perennial ground cover plant species. Sedum kamtschaticum and Hosta longipes were exposed to $200{\mu}g{\cdot}kg^{-1}$ ozone for 8 hours per day (from 08:00 to 16:00) in the naturally irradiated phytotron. The extent of ozone-induced damage was measured through the analysis of physiological parameters, such as water use efficiency (WUE), chlorophyll content (Chl. a, Chl. b, Chl. a + b, and Chl. a/b ratio), carotenoid contents, and the induction of reactive oxygen species (ROS). Ozone exposure significantly reduced the daytime WUE in both species. The contents of chlorophyll and carotenoid were also decreased and ROS, such as hydrogen peroxide ($H_2O_2$) and superoxide radical ($O_2{^-}$) were accumulated after ozone exposure. The above results of this study suggested that S. kamtschaticum is more resistant to atmospheric ozone than Hosta longipes. Considering its fast responses to ozone, it was also assumed that Hosta longipes can be used as an indicator plant of an increase in atmospheric ozone concentration.

• Korean Journal of Food Science and Technology
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• v.49 no.4
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• pp.360-368
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• 2017

The objective of this research was to elucidate the physicochemical, structural, pasting and rheological properties of potato starch isolated from a foreign potato cultivar ('Atlantic') and new domestic potato cultivars ('Goun', 'Sebong', and 'Jinsun'). Scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and one-dimensional nuclear magnetic resonance (1D NMR) showed that the structural properties of potato starch did not vary significantly with cultivars. RVA analysis demonstrated that the 'Atlantic' starch had the highest breakdown viscosity among all potato starches. In steady shear rheological analysis, all potato starch dispersions showed shear-thinning behaviors (n =0.63-0.72) at $25^{\circ}C$. The highest apparent viscosity (${\eta}_{a,5}$), consistency index (K), and yield stress (${\sigma}_{oc}$) were observed in the 'Goun' starch dispersion. In dynamic shear rheological analysis, storage modulus (G') and loss modulus (G") values of new domestic potato starch dispersions were higher than those of the 'Atlantic' starch dispersion.

• Horticultural Science & Technology
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• v.19 no.1
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• pp.81-86
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• 2001

This experiment was carried out to investigate watering with relation to growth, quality and yield of essential oil in sweet basil. The degree of water stress was taken as amount of watering. D1 was watered with 25mL for 2 weeks and 30mL from 4 to 5 weeks after planting in Wagner pot (1/20000a, ${\phi}24cm$). As this, 75mL and 90mL, 225mL and 270mL, and 675mL and 810mL were watered in D2, D3, and D4 treatment respectively. DFT was set up as water stress was not inflicted. The growth of basil in D3 and D4 was better than that of others, in which root activity was as much twice as that of D1. Essential oil of D1 was recorded the lowest content as 0.33%. The result of proline content, peroxidase activity, photosynthesis, stomatal conductance and stomatal resistance were proved D1 to be stressed. This treatment consequently increased the content of essential oil. In consideration of growth and essential oil content, D3 treatment was highest as 47.37mg in oil production per plant. Finally, D3 watered with 225mL for 2 weeks and 275mL from 4 to 5 weeks after planting could be selected on the purpose of both plant growth and essential oil production. Essential oil content of sweet basil was increased in response to water stress. For increase of essential oil yield, oil synthesis could be raised by giving water stress just before harvesting.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2003.05a
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• pp.3-3
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• 2003

고밀도 플라즈마를 생산할 수 있는 대면적용 플라즈마 소스의 개발은 미세전자구조 산업에서부터 FPD 산업에 이르기까지 많은 영역에 걸쳐 필수 불가결한 기술요소가 되어가고 있 다. 이러한 대면적용 고밀도 플라즈마에의 적용을 위하여 새로운 유도결합형 플라즈마 소오스의 개발이 진행되고 있으며, 차세대 반도체 식각 및 세정 공정을 위하여 여러 형태의 안 테나가 연구되어지고 있다. 그러나 TFT -LCD에 적용이 가능하게끔 기존의 ICP 소오스를 직 접적으로 대면적화 하는 데에는 여러 가지 문제점들로 인해 그 한계점이 들어났다. 그 예로 안테나의 길이가 길어짐에 따른 안테나 저항 값이 커지며, 안테나 소스 길이자체가 사용하는 인가전력(13.56MHz)의 반파장에 해당되는 길이가 되었을 경우 생기는 심각한 정상파 효과, 유전물질의 두께 증가 및 그에 따른 재료비의 상승 및 관리상의 어려움들이 바로 그것 이라 할 수 있겠다. 그러므로, 본 연구에서는 차세대 TFT -LCD 대면적 공정에 적용 가능한 고밀도 플라즈마 를 발생시키기 위해서 내장형 유도결합형 선혈 안테나를 사용하였다. 내장형 유도결합형 선 혈 안테나가 가지고 있는 고유의 정전기적 결합효과를 최소화시키기 위해 직사각형모앙의 플라즈마 댐버(830mm*1,020mm)에서 영구자석을 사용하여 multi-cusp 자장효과 및 다양 한 자장의 배열에 따른 플라즈마 특성변화를 살펴보았다. 영구자석을 사용하여 외부자장을 인가하였을 때가, 그럴지 않은 때보다 RF 안테나 코일의 전압을 낮춰주었으며, 영구자석의 배열에 따라 코일의 인덕턴스의 값이 크게 변함을 알 수 있었다. 그리고 최적화된 자장의 배열은 플라즈마의 이온밀도를 증가시켰으며, 플라즈마의 균일도도 10% 이내로 유지됨을 알 수 있었다. 또한 영구자석에 의한 자장의 유무 및 공정압력과 인가전력에 따른 P Photoresist Film의 식각특성에 관해 살펴보았다.증을 위한 실험.측정장비의 구입 및 업계와의 공동활용, 국내.외 최신기술 정보자료의 수집과 신속제공, 국내.외 전문가 초청 활 용, 미래 지향적 목적활용 기초연구사업 수행, 미래기술 동향예측 및 홍보 등을 통해 서 국내 도금기술의 기술자립 및 고도화를 위한 여건마련을 위하여 노력하고 있다.빛 이때의 부식속도(선형분극법), 인위적인 피막 파괴 전,후 의 전위 변화 및 부식속도 측정법에 의한 국부부식 발달 저지능 등을 평가하여 각 실험결과를 비교분석하여 보았다. 수록 민감하여 304 의 IGSCC 와 매우 유사한 거동을 보인다. 본 강연에서는 304 와 600 의 고온 물에서 일어나는 IGSCC 민감도에 미치는 환경, 예민화처리, 합금원소의 영향을 고찰하고 이에 대한 최근의 연구 동향과 방식 방법을 다룬다.다.의 목적과 지식)보다 미학적 경험에 주는 영향이 큰 것으로 나타났으며, 모든 사람들에게 비슷한 미학적 경험을 발생시키는 것 이 밝혀졌다. 다시 말하면 모든 사람들은 그들의 문화적인 국적과 사회적 인 직업의 차이, 목적의 차이, 또한 환경의 의미의 차이에 상관없이 아름다 운 경관(High-beauty landscape)을 주거지나 나들이 장소로서 선호했으며, 아름답다고 평가했다. 반면에, 사람들이 갖고 있는 문화의 차이, 직업의 차 이, 목적의 차이, 그리고 환경의 의미의 차이에 따라 경관의 미학적 평가가 달라진 것으로 나타났다.corner$적 의도에 의한 경관구성의 일면을 확인할수 있지만 엄밀히 생각하여 보면 이러한 예의 경우도 최락의 총체적인 외형은 마찬가지로 $\ulcorner$순응$\lrcorner$의 범위를 벗어나지 않는다. 그렇기 때문에도 $\ulcorner$순응$\lrcorner$과 $\ulcorner$표현$\lrcorner$

• Journal of Nutrition and Health
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• v.47 no.3
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• pp.157-166
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• 2014

Purpose: Rice bran is a byproduct of the hulling of rice and contains a variety of bioactive components. Various studies have reported on the antioxidative, anticancer, immune-enhancing, and hypocholesterolemic effects of rice bran. However, few studies about the physiological activity of stabilized rice bran supplement on dietary intake of sugars is limited. The aim of this study was to investigate the effect of stabilized rice bran supplement on blood glucose in C57BL/6 mice fed a high sucrose diet. Methods: Animals were randomly divided into three groups respectively, and were fed a normal diet (ND group), a high sucrose diet (HSD group) or a high sucrose diet containing 20% stabilized rice bran (HSD-SRB group) for 12 weeks. Results: In the oral glucose tolerance test (OGTT), after seven weeks of feeding on the experimental diets, a significantly lower result was observed for HSD-SRB than for HSD at 30 and 60 minutes after oral administration in glucose solution (2 g/kg body weight). The incremental area under the curve (IAUC) of HSD-SRB was significantly lower than that of HSD. After 12 weeks, fasting blood glucose level of HSD-SRB was significantly lower than that of HSD. No significant difference in the serum insulin level was observed between HSD and HSD-SRB. However, HOMA-IR was significantly decreased in HSD-SRB compared to HSD. In addition, HOMA ${\beta}$-cell was significantly increased in HSD-SRB compared to HSD. Triglyceride in liver of HSD-SRB was significantly lower than that of HSD. Conclusion: Feeding diets containing 20% rice bran improved insulin resistance and insulin secretion by decreasing triglyceride in liver. Thus, rice bran has a positive effect on glycemic control. In addition, the results are expected to be utilized as a basis for human study and development of food products with added rice bran.

• Journal of the Korean Society of Food Science and Nutrition
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• v.33 no.6
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• pp.951-957
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• 2004

Hypoglycemic effect of Prunus mume (PM) extract containing in Sangjinyangheul-tang and Hwangkeumtang, one of the diabetic herbal medicines, was determined by investigating insulin-like action, insulin sensitizing action and a-glucoamylase suppressing action. Insulin-like activity of 3T3-L1 fibroblast was not shown with the treatment of PM methanol extracts. However, treatment with 20% or 40% PM methanol extracts and differentiation inducers significantly decreased the differentiation of 3T3-L1 fibroblasts to adipocytes. A significant insulin sensitizing activity was observed in 3T3-L1 adipocytes, giving PM extracts (60%, 80% and 100%) with 1 ng/mL insulin to reach glucose uptake level increased by 50 ng/mL of insulin alone. In addition, 20% and 40% methanol extracts of PM suppressed the a-glucoamylase activity by 30% in vitro. However, there was no significant differences in the peak of serum glucose levels and area under the curve in Sprague Dawley male rats treated with PM ethanol extract or cellulose and 2 g maltose or dextrin/kg body weight. These data suggested that PM extracts contain effective insulin sensitizing compounds, lipid synthesis suppressing compounds and possibly a-glucoamylase suppressing compounds. Therefore, PM extracts are beneficial for anti-diabetic treatment in obese diabetic patients.

• Journal of the Korean Society of Food Science and Nutrition
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• v.36 no.1
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• pp.72-80
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• 2007

This study was carried out to investigate the effects of various salts on the physical and fermentative characteristics of doughs and on the quality of white pan breads produced using purified salt, Korean solar salt, Chinese solar salt, Mexican solar salt, washed and dehydrated salt, roasted salt, and bamboo salt. In farinogram patterns, dough prepared using the purified salt had the highest water absorption. Extensograms showed that the resistances and resistance/extensibility ratios of the doughs with the solar salts were higher than those with the purified salt. In amylograms, the dough with the bamboo salt had the highest viscosity value. A specific volume was the smallest in the bread with the Korean solar salt (4.11 mL/g), while the largest with the Mexican solar salt (4.85 mL/g). A baking loss rate of the bread prepared with the Korean solar salt (10.34%) was less compared to other samples (10.91 $\sim$ 11.65%). The crust of the bread added with the Korean solar salt showed higher L value and lower a value while its crumb showed the highest b value. A sensory evaluation indicated that significant differences in some characteristics of the breads were observed in the breads prepared with the Korean solar salt and Mexican solar salt. However, flavor, taste, and overall acceptability showed no significant differences among all breads prepared with different salts.