• Journal of the Korean Chemical Society
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• v.42 no.2
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• pp.214-219
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• 1998

Dynorphin B analogues, $[Arg^{11}, D-Ala^{12}]$dynorphin B, $[D-Ala^2, Ala^6, Arg^{11}, D-Ala^{12}]$dynorphin B, and dynorphin B (1-11) were synthesized by solid-phase method. A chloromethylated polystyrene resin cross-linked with 2% divinylbenzene was substituted with Thr in ethanol to contain 1.20 mmol Thr/g of resin. All amino groups of amino acids were protected with t-Boc group and 2,6-dichlorobenzyl and nitro groups were used to protect the side chains of Tyr and Arg, respectively. Stepwise synthetic method was applied for synthesis of the products. Dicyclohexylcarbodiimide (DCC) and 1-hydroxybenzotriazole (HOBT) were used as the coupling reagents. The crude peptides were purified by gel filteration on Sephadex LH-20 column $(2 \times 50 cm)$ using MeOH/MeCN (3/1) and then characterized with HPLC, amino acid analyzer.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.36 no.8
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• pp.767-773
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• 2008

Galileo is a new civil Global Navigation Satellite System(GNSS) developed by Europe. GIOVE-A, a satellite to test Galileo system performance, transmits navigation signal on orbit. Evaluation of Galileo system and development of Galileo receiver needs to analyze GIOVE-A signals. In this paper, we received GIOVE-A signals and processed it using GIOVE-A Interface Control Document(ICD). Signal acquisition, tracking and navigation message decoding made grasping current signal status possible. Bandwidth increase by BOC modulation is one of the difference from GPS. Therefore, we investigated feasibility of conventional GPS L1 RF front-end to receive GIOVE-A E1 signal by evaluation of receiving performance of navigation signal on each bandpass filter of RF front-end.

• Proceedings of the PSK Conference
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• 2003.10b
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• pp.68.1-68.1
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• 2003

A method for determination 11 endocrine disrupting chemicals of phenols in various samples was deloped. The alkylphenols, chlorophenols and bisphenol A were determined by gas chromatography/mass spectrometry-selected ion monitoring (GC/MS-SIM) followed by two work-up methods for comparison; isobutoxycarbonyl (isoBOC) derivatization method and tert-butyldimethylsilyl (TBDMS) derivatization method. Eleven endocrine disrupting chemicals (EDCs) of phenols in biological samples were extracted with acetonitrile and then acetonitrile layer was refrigerated at -60$^{\circ}C$ for 2 hours (freezing filtration). (omitted)

• Journal of the Korean Ceramic Society
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• v.42 no.12 s.283
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• pp.808-815
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• 2005

[ $Bi_xCe_{l-x}O_{2-x/2}$ ](BD C : Bismuth Doped Ceria) powders with x = 0.1, 0.2, and 0.3 were synthesized using the Glycine Nitrate Process (GNP). They were then calcined at $500^{\circ}C$ for 2 hand sintered in a pellet or rod form at 900, 1000 or $1100^{\circ}C$ for 4 h for characterization as the alternative electrolyte material for intermediate temperature solid oxide fuel cells. The BDC powder consisted of a single phase of $CeO_2-Bi_2O_3$ solid solution in the as-synthesized state as well as in the as-calcined state with a mean powder size of 4.5nm in the former state and 6.5 - 10.1nm in the latter. On the contrary, the second phase of $\alpha-Bi_2O_3$ was observed to have been formed in the sinter with its amount increasing roughly with increasing temperature or $Bi_2O_3$ content. The BOC powder was superior in sinterability to other alternative electrolyte materials such as GDC, ScSZ, and LSGM with the minimum sintering temperature for a relative density of $95\%$ or larger as low as $1100^{\circ}C$. The ionic conductivity of BOC increased with $Bi_2O_3$ content and the maximum value of 0.119 S/cm was obtained at $800^{\circ}C$ for $Bi_{0.3}Ce_{0.7}O_{1.85}$.

• The Journal of Natural Sciences
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• v.7
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• pp.47-51
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• 1995

In order to develope new asymmetric catalyst, we synthesized the following new sulfonamide derivatives start from S-Indoline-2-Carboxylic Acid via the following 5 steps. Hydroxy methyl derivative(1) was thus treated with methane sulfonyl chloride in the presence of triethylamine as base to give mesylated derivative(2) in 85% of isolated yield. The mesylate compound (2) was treated with excess sodium azide to give Azido derivative (4) in 95% isolated yield. Azido compound (3) was then reduced to the corresponding amino derivative in near quntitative yield by the hydrogenation under hydrogen atmospere in the presence of catalytic amount of Pd-C. The amino derivative (4) was converted to its sulfonamide derivatives by the treatment of compound(4) with triisopropyl benzene sulfonyl chloride in the presence of triethyl amine as base. Finally t-BOC group of the compound(5) was removed by the treatement of excess Trifluoro-acetic acid in near quantitative yield to give the target sulfonamide derivative (7) .in this paper we prepared compound(6) in 49% overall yield via the 5 steps of synthesis starting from t-Boc- 2-hydroxy methyl indoline(1) which cab be easily prepared from commercial available S-indoline-2-carboxylic acid by known methods. we plan to apply this new catalyst for the asymmetric reduction , diels-alder reaction, aldolcondensation reaction in due courses.

• 한국정보디스플레이학회:학술대회논문집
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• 2002.08a
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• pp.479-482
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• 2002

Benzylideneacetophenones are known as chalcones[1]. The chalcone has been known to be a photo-isomerizable and photo-dimerizable chromophore. The chalcone derivatives were prepared by base-catalyzed condensation of aldehydes and acetophenones, which were substituted with various alkyl chains. The synthesized chalcone was introduced into the t-BOC protected diamine through William synthesis reaction. Photocrosslinkable polyimide was prepared via one-step imidization reaction of DOCDA (5-(2,5-dioxotetrahydro furyl}-3-methyl-3-cyclohexene-1,2-dicarboxylic anhydride) and the chalcone introduced diamine using isoquinoline (5 wt%) in m-cresol. The polyimide solutions were spin-coated onto the quartz, silicone wafer and glass substrates and the obtained thin films were irradiated obliquely with linearly polarized UV light.

• Proceedings of the Korean Nuclear Society Conference
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• 1998.05a
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• pp.58-63
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• 1998

AMBIDEXTER(Advanced Molten-Salt Break even Inherently-Safe Dual-Mission EXperiment & TEst Reactor)는 토륨-우라늄 연료주기의 핵적자활성 요건을 설계하는 방법으로써 핵분열중간 생성물인 $^{233}$ Pa의 시간격리, 노내 방사성물질 농도저감, 잉여반응도 및 증식률향상을 위해 핵분열 생성물질의 온라인 정화.처리.재생 개념을 채택하고 있다. 본 연구에서는 AMBIDEXTER 로심의 핵분열성물질의 연소와 온라인 정화.처리에 따른 핵연료내 원소분포 변화를 기술하기 위해 핵분열생성물질의 평형포화농도에 대응하는 등가연소도(Equivalent Burnup)를 정의하고 이를 노심의 핵적자활성 요건에 대해 최적화하는 핵연료 정화공정의 시간상수 특성을 시뮬레이션 하였다. 핵분열생성물질농도의 동특성은 ORIGEN2 코드에 내장된 연속재처리 모델을 이용하여 해석하였으며 실용화가 입증된 후보정화공정들을 고려하여 모든 핵종을 5종의 핵종군으로 분류하여 평가하였다. 시뮬레이션 결과 유효정화주기를 0.1 (노심장전량/일)로 연속재처리 할 때 노심내 포화등 가연소도는 약 650 (MWD/TeH.E.)로 대응되며 이때 동일한 핵연료량으로부터 생성된 노내 핵분 열생성물질 평형농도는 최대연소도 33000MWD/TeU의 PWR 평형노심 BOC시의 대비해 약 1/10 에 해당하는 양이 잔유하는 것으로 나타났다.

• Proceedings of the Korean Society of Crop Science Conference
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• 2017.06a
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• pp.286-286
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• 2017

We conducted to compare the characteristics of rice flours according to the different milling processes. Five rice varieties (Oryza sativa L.) with different amylose content were prepared by wet and dry milling processes. The moisture contents of wet-milled rice flours (WMR) was mostly three-time higher than those of dry-milled flours (DMR). Water absorption index (WAI), water solubility index (WSI) and swelling power (SP) increased in proportion to temperature ($50-90^{\circ}C$). WAI, WSI, SP of DMR showed higher value than those of WMR. Baeokchal (BOC) which is waxy rice cultivar was significantly high level of WSI. Pasting properties of DMR except BOC cultivar resulted in higher peak viscosity, trough viscosity, final viscosity and Setback. The levels of resistant starch in the four cultivars except Dodamssal (DDS) were under 1% irrespective of Milling processes, whereas the resistant starch contents of DMR and WMR in DDS was 9.18 and 6.27, respectively. Damaged starch content of WMR were less than those of DMR, moreover, negative correlation was observed between amylose content and damaged starch of rice cultivars. These results suggest that the properties of rice flour varied depending on the milling methods and varieties, and it could be a reference for selecting the appropriate processing purposes.

• Journal of Advanced Navigation Technology
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• v.12 no.6
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• pp.574-582
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• 2008

This paper shows the research about the development of software receiver processing Galileo E1B signal. it is introduced the structure of Galileo receiving software using sampled IF data as a program input. And the performance of SDR(Software Defined Radio) embodied using MATLAB tool is analyzed. Embodied SDR is modulated according to their roll and function.

• Journal of the Korean Society of Food Science and Nutrition
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• v.43 no.11
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• pp.1785-1790
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• 2014

This study was carried out to compare the physicochemical characteristics and sensory qualities of Sikhye (Korean traditional rice beverage) prepared with foxtail millet, proso millet, and sorghum. The cultivated varieties were Setaria italica Beauv. cv. Samdamae (SDM) and Samdachal (SDC), Panicum miliaceum L. cv. Ibaekchal (IBC), Sorghum bicolor (L.) Moench cv. Nampungchal (NPC), Donganme (DAM), Oryza sativa cv. Ilpum (IP), and Baegokchal (BOC). The brix degrees of SDM, SDC, IBC, NPC, DAM, IP, and BOC Sikhye were 9.53, 8.63, 5.67, 7.57, 6.27, 12.50, and $12.27^{\circ}Bx$, respectively. There were no significant differences in pH (5.99~6.10) among the groups. The highest turbidity was 1.07 in DAM Sikhye. The L-value, a-value, and b-value were 30.85~41.11, -0.34~2.52, and 2.56~5.67, respectively. Total polyphenol contents of SDM, SDC, IBC, NPC, DAM, IP, and BOC Sikhye were 241.52, 213.69, 202.34, 258.25, 193.24, 160.81, and $170.31{\mu}g\;GAE/mL$, respectively. Total flavonoid contents of Sikhye were $19.21{\sim}54.30{\mu}g\;CE/mL$. The highest DPPH and ABTS radical scavenging activities were $16.85{\pm}0.39$ and $64.75{\pm}2.92mg\;TE/100mL$ in DAM Sikhye, respectively. Finally, the sensory evaluation results indicate that there were significant differences in appearance, aroma, and taste between the groups, and SDM Sikhye was similar with IP and BOC.