• 천문학회지
• /
• 제37권5호
• /
• pp.315-322
• /
• 2004

Several arguments have been presented in the literature to support the connection between radio halos and cluster mergers. The spectral index distributions of the halos in A665 and A2163 provide a new strong confirmation of this connection, i.e. of the fact that the cluster merger plays an important role in the energy supply to the radio halos. Features of the spectral index (flattening and patches) are indication of a complex shape of the radiating electron spectrum, and are therefore in support of electron reacceleration models. Regions of flatter spectrum are found to be related to the recent merger. In the undisturbed cluster regions, instead, the spectrum steepens with the distance from the cluster center. The plot of the integrated spectral index of a sample of halos versus the cluster temperature indicates that clusters at higher temperature tend to host halos with flatter spectra. This correlation provides further evidence of the connection between radio emission and cluster mergers.

• 동의생리병리학회지
• /
• 제18권6호
• /
• pp.1548-1551
• /
• 2004

studied on the physicochemistrical property of the clean active water depositting on the ceramic stone by the mineral-Oriental medicine. The results are as follows. The cluster of the clean active water is observed 53-66.5㎐ for contral water. The clean active water is observed 7.2 ph and 1.3330 refractive index for contral water. In the chemical experimental test by ICP, the clean active water is observed 102℃ in boiling point and 4.8㎎/100g V.E for 0㎎g/100g of contral water. In the antibiotic experimentation, an anion, the dimintion index of bacilli, radiation degree and radiate energy of the clean active water increased for contral water. And in the deodorization experimentation, the clean active water is observed 95% deodorization index.

• 한국약용작물학회지
• /
• 제22권2호
• /
• pp.91-97
• /
• 2014

The contents of index components in 5 medicinal crops cultivated at different heights in Andong area. The contents of allantoin in Dioscorea batatas Decne and catalpol in Rehmannia glutinosa Liboschitz were not different by cultivation heights (100 ~ 200m). But the contents of index components in Astragalus membranaceus and Angelica acutiloba Kitagawa were higher in samples cultivated at elevated heights. At 700 m of heights, the contents of formononetin and astragaloside I in Astragalus membranaceus were 1.20 and $201.2{\mu}g/g$, respectively. The contents of decursin and nodakenin in Angelica acutiloba Kitagawa were 68.3 and 4.20 mg/g, respectively. Thus Astragalus membranaceus and Angelica acutiloba Kitagawa are recommended to be cultivated in higher altitude.

• 한국초전도ㆍ저온공학회논문지
• /
• 제17권3호
• /
• pp.37-40
• /
• 2015

Recently, the electrical insulation design for electrical apparatuses is important to cope with the tendency of high voltage. The degradation characteristics of a superconducting coil due to an electrical breakdown should be considered to design a high voltage superconducting coil. In this paper, the degradation characteristics of 2G high temperature superconducting (HTS) wires are studied with respect to electrical breakdown tests. To analyze the dependency of the degradation characteristics of 2G HTS wires, the electrical breakdown tests are performed with AC(alternating current) and DC(direct current) voltage. All tests are performed by applying various magnitudes of AC and DC breakdown voltages. To verify the degradation characteristics of 2G HTS wires, the tests are performed with various 2G HTS wires with respect to stabilizer materials. The degradation characteristics of 2G HTS wires, such as Ic(critical current) and index number are measured by performing electrical breakdown tests. It is found that the characteristics such as Ic and index number can be degraded by an electrical breakdown. Moreover, it is concluded that the degradation characteristics of 2G HTS wires are affected by the stabilizer material and applied voltages. The cross-sectional view of 2G HTS wires is observed by using a scanning electron microscope (SEM). As results, it is found that the degradation characteristics of 2G HTS wires are concerned with hardness and electrical conductivity of stabilizer layers.

• Food Science and Biotechnology
• /
• 제15권2호
• /
• pp.254-259
• /
• 2006

Milling qualities and indigestible carbohydrate fractions (ICF) depending on harvesting time of Goami2 (G2), mutant of Ilpum (IP) rice, was examined. Fifty days after heading (DAH) maximized head rice milling quality (57.69%) and ICF content ($5.09{\pm}0.36\;g/100\;g$). ICF contents and physical properties of G2 and IP at 50 DAH were compared. ICF of G2 was three times higher than that of IP ($1.61{\pm}0.09\;g/100\;g$). Parboiling treatment increased ICF of G2 to $7.18{\pm}0.16\;g/100\;g$. G2 showed lower water absorption index, which could lower pasting properties, but higher water solubility index, implying it contains more soluble components. Texture properties of G2 were different from those of IP, showing higher hardness, and lower adhesiveness and cohesiveness. Positive correlation was observed between ICF and hardness, but reverse correlation between ICF and cohesiveness.

• 한국물환경학회지
• /
• 제24권6호
• /
• pp.701-708
• /
• 2008

As a countermeasure for reduction of corrosion in the delivery and distribution pipes used for tap water, materials for the pipelines in-houses and the effect of water quality on corrosivity of water pipelines were investigated in the distribution system of Han river. As the corrosion index at 6 water purification facilities of Han river, average Langelier Saturation Index (LI) of raw and finished water were -1.0 and -1.4 respectively and average Larson Index (LR) were 9.5 and 9.9, respectively. And also corrosion potential showed corrosivity in finished water (-431~-462 mV) as well as raw water (-426~-447 mV). This results indicate that tap water quality of han river have corrosivity. To understand the corrosivity effect in pipe material used for premise distribution system, water quality of stagnant tap water and tap water were analyzed and the differences between them were calculated. The difference concentration of iron, copper and zinc were $12.9{\mu}g/L$, $31.0{\mu}g/L$ and $45.0{\mu}g/L$ respectively in galvanized steel pipe for use more than 15 years and showed highest concentration. As a result, the control to corrosivity in the water pipelines, corrosivity control treatment in the water purification system can be applied. In advance it is necessary to monitor corrosivity of water quality using corrosive index because corrosivity may differ from the seasonal and regional characteristics and water chemicals dosage. For the future the guideline for corrosion index have to be established.

• 농업과학연구
• /
• 제20권1호
• /
• pp.48-55
• /
• 1993

본 연구(硏究)는 1986년부터 1990년까지 충청남도(忠淸南道) 도립종축장(道立種畜場)에서 사육된 Landrace, Large Yorkshire 및 Duroc종의 후보종 모돈 115두의 이유후 형질(形質)에 대한 능력검정(能力檢定) 자료를 근거로 최소자승법을 이용하여 품종(品種), 산차(産差), 분만년도(分娩年度) 및 분만월(分娩月)이 일당증체량(日當增體量), 사료요구율, 등지방층두께, 90kg도달일령 및 선발지수에 미치는 효과(效果)를 추정(推定)하였던 바 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 이유후형질(形質)의 전체평균은 일당증체량(日當增體量), 사료요구율, 등지방층두께, 90kg도달일령 및 선발지수(選拔指數)에서 각각 $922.25{\pm}17.25$g, $2.85{\pm}0.04$, $2.03{\pm}0.04$cm, $135.44{\pm}1.38$일 및 $168.33{\pm}2.42$이었다. 2. 품종의 효과(效果)에 있어서는 일당증체량(日當增體量), 90kg도달일령 및 선발지수(選拔指數)에서 고도의 유의차(有意差)(P<0.01)가 인정되었으며, 등지방두께에 있어서도 유의차(P<0.05)가 나타났다. 품종별로는 Duroc종이 일당증체량(日當增體量), 90Kg도달일령및 선발지수(選拔指數)에서는 각각 977.23g, 132.47일 및 172.35로 가장 우수하였고, 등지방층두께는 Landrace종이 1.95cm로 가장 얇었다. 3. 산차(産差)의 효과(效果)에 있어서 일당증체량(日當增體量)은 고도의 유의차(有意差)(P<0.01)가 인정되었으며, 등지방층두께 및 선발지수(選拔指數)에서도 유의차(有意差)(P<0.05)가 인정되었고, 산차(産差)로는 일당증체량(日當增體量) 및 선발지수(選拔指數)가 3산차(産差)와 4산차(産差)에서 각각 974.92g, 177.61, 959.48g 및 1774.84로 가장 우수하였다. 4. 분만년도의 효과(效果)에 있어서는 일당증체량(日當增體量), 사료요구율 및 선발지수(選拔指數)에서 고도의 유의차(P<0.01)가 인정되었으며, 분만월에 있어서도 일당증체량(日當增體量)에서 고도의 有意差(P<0.01)가 인정되었고, 등지방층두께 및 선발지수(選拔指數)에서는 유의차(有意差)(P<0.05)가 있었으며, 분만월별로는 3월분만이 일당증체량 및 선발지수(選拔指數)에서 각각 968.22g, 174.54로 가장 우수하였다.

• 한국응용과학기술학회지
• /
• 제36권1호
• /
• pp.1-12
• /
• 2019

돼지감자를 9번 찌고 9번 말려서 차를 제조한 다음 M사의 돼지감자차와 성분 및 기능성을 비교 분석하였다. 개발한 돼지감자차는 칼로리 342.27kcal, 탄수화물 73.87g/100g, 유리당 32.66mg/100g, 회분 6.80g/100g, 단백질 8.21g/100g이었고 무기물 총량은 2,785.67mg/100g, 칼륨 2,563.93mg/g, 칼슘 97.52mg/g, 마그네슘 88.78mg/g 등이었다. 돼지감자차의 유리당 총량은 32.66mg/100g이고 그중 fructose 17.40mg/100g, sucrose 9.03mg/100g, glucose 6.05mg/100g이었다. 돼지감자 차의 포화지방산은 30.34mg/100g, 4 불포화지방산은 69.66mg/100g이었고 그 중 linoleic acid 47.00mg/100g, palmitic acid 25.31mg/100g, linolenic acid 8.61mg/100g이었다. DPPH 라디컬 소거력은 개발한 차 34.2%, 비교용 M사차 5.2%, 지표물질 44.0%였다. ABTS 라디컬 소거력은 개발한 차 93.0%, M사차 61.9%, 지표물질 47.6%였다. SOD 유사활성은 개발한 차 2.7%, M사차 1.6%였다. 플라보노이드 함량은 개발한 차 2.8 fold, M사차 2.0 fold, 지표물질 1.7 fold 였다. 폴리페놀 함량은 개발한 차 38.2 fold, M사차 8.92 fold, 지표물질 14.0 fold였다. ${\alpha}$-Glucosidase 저해율은 개발한 차 9.83%, M사차 8.92%였다. 기호도는 1회 우린 것과 5회 우린 것을 비교하였다. 1회 우린 것을 기준으로 할 때 5회 우린 것의 기호도 중 색은 개발한 차 83.7%, 비교용 차 50.0%, 향기는 개발한 차 78.0%, 비교용 차 42.5%, 맛은 개발한 차 66.7%, 비교용 차 37.5%, 종합적인 기호도는 개발한 차 73.3%, 비교용 차 47.5%로 나타났다. 이같이 비교용 M사차는 우릴수록 추출 성분이 감소하여 5회 후에 종합적인 기호도는 46.3%로 감소한 반면 개발한 차는 감소폭이 적어서 73.3%를 나타냈다. 이같이 개발한 돼지감자차는 비교용 M사차 및 지표물질보다 항산화 작용이 강하고 유효 물질 함량도 더 많고, 기호성도 높으므로 질병 예방 및 개선 효과가 클 것으로 생각한다.

• Asian-Australasian Journal of Animal Sciences
• /
• 제17권10호
• /
• pp.1447-1451
• /
• 2004

An experiment was conducted to determine the effects of different dietary crude protein (CP) levels on growth performance, nutrient utilization, small intestine protease activity and immunity index of weaner to 2 month-old New Zealand rabbits. Eighty weaner rabbits were allocated in individual cages to five treatments in which they were fed diets with CP at 14%, 16%, 18%, 20% and 22%, respectively. The growth performance and nutrient digestibility of rabbits increased firstly when dietary CP increased, then decreased. The average daily gain was the highest and feed conversion rate was the lowest when dietary CP reached 20%, namely 34.9 g/d and 2.74:1, respectively. Maximum CP digestibility was 72.1% in the 18% CP group, maximum crude fiber digestibility of 28.4% occurred in the 16% CP group and was significantly different from other treatments (p<0.01), apparent digestibility of Lys and Val followed the same trend as CP digestibility, and reached their maximum when dietary CP was 18%. Apparent digestibility of Cys, Tyr, Leu and Thr also had a similar trend to CP digestibility. Nitrogen retention (RN) increased with CP level (p>0.05), and was highest for 20% CP treatment (1.5 g/d). The effect of CP level on the rate of digestible nitrogen (DN) converted RN was small. The spleen index, thymus index, chymotrypsin and trypsin activities in small intestine were highest when dietary CP was 16%, which were 1.0, 2.8, 15.7 U/g and 125.7 U/g, respectively. There was no significant difference among treatments (p>0.05). According to the above results, the appropriate dietary CP level from weaner to 2 month-old meat rabbits was 18-20%.

• 원예과학기술지
• /
• 제19권3호
• /
• pp.358-361
• /
• 2001

경북 안동과 영양 지역 과수원에서 적숙기에 수확한 '후지' 사과 과실을 중량별로 분류한 후, 과중, 종자 수, 종자 중량과의 관계를 분석하고 이들 요인과 과형지수 및 기형지수와의 상관관계를 조사하였다. 과실당 평균 종자수와 무게는 안동과수원의 경우 8.9개, 종자 중량 0.64g이었고 영양 과수원은 6.3개, 0.47g이었다. 두 과수원의 조사자료를 종합하여 분석한 결과, 과중은 종자 중량과 정의 상관관계가 있었던 반면 종자의 수와는 상관관계가 낮은 것으로 분석되었다. 과형지수는 종자 수나 종자 중량과 미미한 상관관계를 보였으나 과중과 정의 상관관계를 보였다. 과실의 기형지수는 종자수가 많고 종자 중량이 큰 안동과수원 과실에서 낮은 경향을 보였으며 종자의 수 또는 종자 중량과 고도로 유의한 부의 상관관계를 보였다.