• 한국식품과학회지
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• 제31권5호
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• pp.1254-1261
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• 1999

전분의 노화에 대한 새로운 억제물질의 탐색연구 일환으로 칡성분의 첨가 효과를 알아보기 위하며 칡 분말 및 이들의 한외여과 성분 분획의 첨가가 동진벼 쌀가루(8%, w/v) 호화액의 유동 특성에 미치는 영향을 조사하였다. 아울러 냉장 보관중의 유동 특성에 대한 경시변화를 측정하였으며, 이들 유동특성을 변화시키는 주 요인 성분을 탐색하였다. 칡 분말의 첨가로 쌀가루 호화액 유동 특성의 큰 변화를 동반하였으며, 특히 한외여과 투과분획의 저분자 물질종에서 쌀가루 호화액 및 이의 저장중의 유동 특성 변화가 가장 현저하였다. 한외여과 투과액 분획의 첨가는 쌀가루 수용액의 의가소성, 항복응력 및 점조지수값을 크게 감소시켰으며 비교적 저장중의 안정성을 나타내어 노화억제의 효과가 시사되었다. 이들 한외여과 투석액 분획의 저분자 물질은 칡뿌리의 isoflavonoid로 알려진 puerarin, deidzein 및 deidzin인 것으로 확인되었다.

• 농업과학연구
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• 제40권4호
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• pp.395-403
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• 2013

Plant factory has drawn attention in many countries in the world due to capability of environmental control not only for better yield and quality, but also for increase in functional and medicinal components of the products. In this paper, an experimental plant factory was constructed for various tests under different environmental conditions, and the operations were evaluated. A production room was constructed with adiabatic materials with dimensions of $6,900{\times}3,000{\times}2,500$ mm ($L{\times}W{\times}H$). Four sets of $2,890{\times}600{\times}2,320$ mm ($L{\times}W{\times}H$) production frame unit, each with 9 light-installed beds and an aeroponic fertigation system, resulting in 36 beds, were prepared. Accuracy and response were evaluated for each environmental control component with and without crops. Air temperature, humidity, $CO_2$ concentration, light intensity, frequency, and duty ratio, fertigation rate and scheduling were controllable from a main control computer through wireless communication devices. When the plant factory was operated without crop condition, the response times were 8 minutes for change in temperature from 20 to $15^{\circ}C$ and 20 minutes from 15 to $20^{\circ}C$; 7 minutes for change in humidity from 40 to 65%; and 4 minutes for change in $CO_2$ concentration from 450 to 1000 ppm. When operated for 24 hours with crop cultivation; average, maximum, and minimum values of temperatures were 20.06, 20.8, and $18.8^{\circ}C$; humidity were 66.72, 69.37, and 63.73%; $CO_2$ concentrations were 1017, 1168, and 911 ppm, respectively. Photosynthetic Photon Flux Density was increased as the distance from the light source decreased, but variability was greater at shorter distances. Results of the study would provide useful information for efficient application of the plant factory and to investigate the optimum environment for crop growth through various experiments.

• 한국작물학회지
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• 제31권1호
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• pp.24-29
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• 1986

참깨의 N, P, K 시비수준별 생육과 함유량, 지방산조성분포를 검토하여 얻은 결과를 요약하면, 1. 질소배비(16k/10a)시용시 초장과, 주당삭수, 착삭부위장, 분지수등은 증가되나, 삭당입수와 종실중은 표준비(8k/10a)에서 가장 많았다. 2. 가리의 배비(18k/10a)시용시에는 지상부 생육과 등숙비율이 모두 높았으며, 인산 및 가리, 배비구(N 8, P$_2$O$_{5}$ 8, $K_2$O 18k/10a)에서는 표준비(N 8, P$_2$O$_{5}$ 4, $K_2$O 9k/10a)의 종실중 91kg보다 11% 증가되었다. 3. 엽의 무기성분중 N과 $K_2$O는 파종후 20일에 가장 높았으며 이후 점차 감소되는 경향으로 N과 $K_2$O 배비시 엽의 N, $K_2$O 배비시 엽의 N, $K_2$O 함량은 증대되었다. 4. 시비수준별 함유량은 질소의 배비시용구(16k/10a)와의 P$_2$O$_{5}$ 표준시용구(4k /10a)에서 가장 많았으나, 가리에서는 차이가 없었다. 5. 지방산조성은 양질의 Oleic acid는 질소, 인산,가리의 배비구에서 가장 많았으며, Linoleic acid는 인산배비구에서 가장 높았다.

• 한국축산식품학회지
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• 제40권2호
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• pp.209-220
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• 2020

Milk fat globule membrane (MFGM) is a lipid carrier in mammals including humans that consists mainly of polar lipids, like phospholipids and glycolipids. In this study, a process to enrich polar lipids in commercial butter and whey powder, including polar lipids of MFGM, was developed. WPC (whey protein concentrate) 60 was selected as the most suitable raw material based on the yield, phospholipid, protein, and lactose content of the polar lipid fraction obtained by ethanol extraction of two WPC (WPC60 and WPC70) and two buttermilk (A and B). After fractionation under optimum conditions, the polar-lipid enriched fraction from WPC60 contained 38.56% phospholipids. The content of glycolipids, cerebroside, lactosylceramide, ganglioside GM3, ganglioside GD3, was 0.97%, 0.55%, 0.09%, and 0.14%, respectively. Rancimat results showed that the oxidation stability of fish oil increased with an increase in the polar-lipid fraction by more than 30 times. In addition, the secretion of IL-6 and TNF-α decreased in a concentration-dependent manner after treatment of RAW 264.7 cells with 0.1 to 100 ppm of the polar lipid fraction. In this study, polar lipid concentrates with antioxidant and anti-inflammatory activity, were prepared from milk processing by-products. The MFGM polar lipid concentrates made from by-products are not only additives for infants, but are also likely to be used as antioxidants in cooking oils and as active ingredients for functional foods.

• 한국초전도ㆍ저온공학회논문지
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• 제18권1호
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• pp.59-63
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• 2016

The superconducting NMR magnets have used cryogen such as liquid helium for their cooling. The conduction cooling method using cryocoolers, however, makes the cryogenic cooling system for NMR magnets more compact and user-friendly than the cryogen cooling method. This paper describes the thermal and structural analysis of a cryogenic conduction cooling system for a 400 MHz HTS NMR magnet, focusing on the magnet assembly. The highly thermo-conductive cooling plates between HTS double pancake coils are used to transfer the heat generated in coils, namely Joule heating at lap splice joints, to thermal link blocks and finally the cryocooler. The conduction cooling structure of the HTS magnet assembly preliminarily designed is verified by thermal and structural analysis. The orthotropic thermal properties of the HTS coil, thermal contact resistance and radiation heat load are considered in the thermal analysis. The thermal analysis confirms the uniform temperature distribution for the present thermal design of the NMR magnet within 0.2 K. The mechanical stress and the displacement by the electromagnetic force and the thermal contraction are checked to verify structural stability. The structural analysis indicates that the mechanical stress on each component of the magnet is less than its material yield strength and the displacement is acceptable in comparison with the magnet dimension.

• 정보학연구
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• 제5권3호
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• pp.97-119
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• 2002

각 은행들은 인터넷 뱅킹을 통해 경쟁력 확보하기 위해 서비스 개발에 박차를 가하고 있을 뿐만 아니라, 새로운 뱅킹 비즈니스 모델을 구현하고 있다. 특히 인터넷 뱅킹 경쟁력 평가는 단순히 인터넷 뱅킹 사이트의 서비스 평가와는 다르다. 국내외 인터넷 뱅킹에서 제공하는 서비스 상품들은 성공적인 합병과 다양한 온라인 접점의 구축을 통해 금융서비스를 가장 효율적으로 제공하며, 또한 은행업무뿐만 아니라 증권서비스, 보험, 소비자금융, 리스, 부동산업무 등을 원스톱으로 제공하는 등 다양한 서비스를 제공하며, 사업의 영역을 넓혀가고 있다. 그리고 대부분의 국내외 은행 및 금융기관들이 인터넷 뱅킹 서비스 개발을 통하여 경영효율성을 증대시키고 경쟁력을 제고하고자 노력하고 있다. 특히 국내외 은행들이 일대일 맞춤 서비스, 개인 재무관리 그리고 인터넷뱅킹을 이용한 아파트관리비 납부서비스 상품을 개발하여 제공하고 있을 뿐만 아니라, 통합모바일서비스, 세금 전자납부 징수, 인터넷 무서류 대출 상품 서비스를 개발하여 시장에서 판매하고 있다. 따라서 현재의 고객 및 잠재고객들이 은행의 인터넷 뱅킹 서비스를 적극 이용하도록 유치함으로써 은행 및 금융기관들은 그들의 경쟁적위상을 제고시키고자 노력하고 있다.

• Advances in concrete construction
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• 제9권6호
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• pp.547-556
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• 2020

This study aimed to develop reference materials (RMs) that are chemically stable and can simulate the flow characteristics of cement paste. To this end, the candidate components of RMs were selected considering the currently required properties of RMs. Limestone, slag, silica, and kaolin were selected as substitutes for cement, while glycerol and corn syrup were selected as matrix fluids. Moreover, distilled water was used for mixing. To select the combinations of materials that meet all the required properties of RMs, flow characteristics were first analyzed. The results revealed that silica and kaolin exhibited bilateral nonlinearity. When an analysis was conducted over time, slag exhibited chemical reactions, including strength development. Moreover, fungi were observed in all mixtures with corn syrup. On the other hand, the combination of limestone, glycerol, and water exhibited a performance that met all the required properties of RMs. Thus, limestone, glycerol, and water were selected as the components of the RMs. When the influence of each component of the RMs on flow characteristics was analyzed, it was found that limestone affects the yield value, while the ratio of water and glycerol affects the plastic viscosity. Based on this, it was possible to select the mixing ratios for the RMs that can simulate the flow characteristics of cement paste under each mixing ratio. This relationship was established as an equation, which was verified under various mixing ratios. Finally, when the flow characteristics were analyzed under various temperature conditions, cement paste and the RMs exhibited similar tendencies in terms of flow characteristics. This indicated that the combinations of the selected materials could be used as RMs that can simulate the flow characteristics of cement paste with constant quality under various mixing ratio conditions and construction environment conditions.

• Asian-Australasian Journal of Animal Sciences
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• 제33권10호
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• pp.1573-1578
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• 2020

Objective: Milk fatty acid (FA) is a main nutritional component that markedly effects human health. Intentional modification of the FA profile has the potential to improve milk quality. This study aimed at the factors affecting elevated FA levels and the estimation of the genetic parameters for milk FAs in the Korean Holstein population. Methods: Total 885,249 repeated test-day milk records including, milk yield, saturated fatty acids (SFA), polyunsaturated fatty acids (PUFA), monounsaturated fatty acids (MUFA), total unsaturated fatty acids (TUFA), fat and protein percentages were analyzed using CombiFoss FT+ system (Foss Analytical A/S, Denmark). Genetic parameters were estimated by the restricted maximum likelihood procedure based on the repeatability model using the Wombat program. Results: The FA profile varies along with the lactation and the energy balance (EB). With the negative EB in early lactation, mobilization of body fat reserves elevates the desirable FA levels. As a result of that, milk quality is increased by means of nutritionally and usability aspects during the early lactation. Moreover, heritability estimates for SFA, MUFA, PUFA, TUFA were 0.33, 0.42, 0.37, 0.41 respectively. According to the parity wise heritability analysis, first parity cows had relatively lower heritability for SFAs (0.19) than later parities (0.28). Conclusion: Genetic parameters indicated that FAs were under stronger genetic control. Therefore, we suggest implementing animal breeding programs towards improving the milk FA profile.

• Asian-Australasian Journal of Animal Sciences
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• 제13권9호
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• pp.1228-1234
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• 2000

The reported study was conducted on range managed Malpura ewes that were non-breeding empty, were at an advanced stage of pregnancy, and were in early lactation, under a protocol of free grazing with concentrate supplementation at 1.00, 1.25 and 1.50% of their body weight to assess their plane of nutrition and nutrient intake. The biomass yield of pasture plots was 1689, 1820 and 2912 kg/ha in pregnancy, lactation and empty phases, respectively. In addition to natural shrubs and forbs, Cenchrus ciliaris (36.4%) and dead litter (31.6%) were the major component of pasture vegetation during pregnancy. The dead litter disappeared during the lactation and empty phase with a concomitant increase in distribution of Cenchrus ciliaris to 73.0 and 87.2% respectively. The daily dry matter consumption from supplemental concentrate and free grazing was 70.1, 57.3 and 63.5 g/kg $W^{0.75}/d$ with concentrate to roughage ratio of 40:60, 47:53 and 33:67 in pregnancy, lactation and empty phases respectively. Digestibility of DM and OM were similar in the three phases while CP digestibility was higher (p<0.0l) during lactation than other two phases. Digestibility of NDF, ADF and cellulose were higher (p<0.0l) in empty than pregnancy and lactation, while hemicellulose digestibility was similar in lactation and empty and lower in pregnancy phase. The ewes in ~hases of pregnancy, lactation and empty consumed 7.1, 7.7 and 6.1 g DCP and 197.2, 214.6 and 232.5 kcal DE/kg $W^{0.75}/d$ respectively. It is concluded that ewes maintained on semi-arid Cenchrus dominated pasture with concentrate supplementation during pregnancy, lactation and empty phases consumed 45.2, 45.1 and 35.2 g DCP/Mcal ME respectively.

• 한국약용작물학회지
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• 제14권4호
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• pp.212-216
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• 2006

황금 (Scutellaria baicalensis Gergi)에 함유된 항산화 억제활성 물질을 분리하고 항산화 효과에 대하여 조사한 결과는 다음과 같다. 1. 황금 500g을 100% MeOH로 추출하여 150g의 수율을 얻었으며, 다시 분획하여 Ethyl ether 13.2g과 n-BuOH 10.3g, Water 126.5g을 얻었다. 2. Ethyl ether 분획을 Column chromatography, TLC 및 HPLC를 이용하여 xanthine oxidase 억제활성을 가진 compound I을 분리하였다. 3. $^1H-NMR,\;^{13}C-NMR$, MS spectrometer 등 분광학적 방법을 이용하여 Compound I의 구조를 규명한 결과, flavonoid 물질로서 compound I은 구조식이 3,5,7-trihydroxy-2'-methoxy-flavanone로 확인되었다.