• 한국자기학회:학술대회 개요집
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• 한국자기학회 1999년도 춘계연구발표회 논문개요집
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• pp.34-35
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• 1999

• 한국자기학회:학술대회 개요집
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• 한국자기학회 1999년도 춘계연구발표회 논문개요집
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• pp.140-141
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• 1999

• 분석과학
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• 제15권1호
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• pp.31-35
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• 2002

${CIO_4}^-$ 이온만을 선택적으로 감지하는 새로운 수용체가 개발되었다. $[Pd(Me_4en)(Py_2S){\cdot}2ClO_4]_4$ ($Me_4en$ = N,N,N'N'-tetraethylethylenediamine; $Py_2S$ = 4,4'-dipyridyl sulfide) 착화합물에서 주-객 화학종 간의 고감도 작용력을 연구하였다. $Py_2S$의 피리딜 기는 온도, 농도, 매개체 등에 아주 민감한 두 가지의 셋트의 $^1H$ NMR, 공명 시그날을 보여주었다. 이러한 NMR 거동을 수용액에서 고리 사합체의 양이온과 ${CIO_4}^-$ 음이온 간의 정기적 인력에 의한 평형 때문인 것으로 해석되었다.

• Journal of the Korean Wood Science and Technology
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• 제46권1호
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• pp.1-9
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• 2018

칠기문화재 보존에 옻칠이 사용되지만 근대화로 인해 캐슈칠과 같은 합성도료가 같이 사용되는 추세이다. 보존윤리에서는 문화재 보존 시 동일 재료가 사용되어야 한다고 명시되어있다. 따라서 칠기문화재 보존에는 옻칠과 같은 천연 도료가 사용되어야 한다. 하지만 옻칠과 캐슈칠의 성분이 유사하여 전문가들도 쉽게 구분하지 못하는 실정이다. 본 연구에서는 IR과 Py-GC/MS를 이용하여 이를 분석하고 식별 키워드를 찾고자 하였다. IR 분석 결과 옻칠은 $720cm^{-1}$ 대에서 피크가 확인되었으며 캐슈칠은 $750cm^{-1}$, $720cm^{-1}$, $700cm^{-1}$ 대에서 피크가 확인되었다. Py-GC/MS 결과 두 종류의 시료에서 Benzene과 Phenol계 화합물과 알킬사슬고리에 기인하는 성분이 검출되었다. 하지만, 캐슈칠에서는 Hexanoic acid라는 성분이 검출되었고 옻칠에서는 검출되지 않았다. 이러한 분석방법을 토대로 진정성 있는 칠기문화재 보존처리 및 복원에 활용될 수 있을 것이라 판단된다.

• 한국조리학회지
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• 제24권1호
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• pp.114-121
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• 2018

This study developed a new yanggaeng(red bean sweet jelly) by adding Peucedanum japonicum powder from 5% to 20%. It has been evaluated its physicochemical, sensory characteristics and antioxidant activity. The DPPH radical scavenging activity of Peucedanum japonicum powder was 40.53% and the total phenolic compound content was 13.36 mg/100 g. Moisture content of yanggaeng with Peucedanum japonicum powder added 5~15% was 50.24~48.32% significantly higher than in the control group(p<0.05). The hardness of yanggaeng was $2,748.25g/m^2$in control and the PY5 and PY10 were $4,012.05g/m^2$ and $4,019.40g/m^2$ respectively, significantly higher than control(p<0.05). However, when the amount of Peucedanum japonicum powder was increased by more than a certain rate, it decreased again, as $2,155.39g/m^2$ in PY20. As a result of the acceptance test of the yanggaeng, the flavor of yanggaeng with Peucedanum japonicum powder was evaluated significantly higher than control(p<0.05), but PY20 was 5.20 not significantly difference with PY10. The overall acceptance of the yanggaeng showed the lowest value of 4.00 in the control, PY15 showed significantly high value as 7.80(p<0.05). Compared with the control, the acceptance of samples with Peucedanum japonicum powder 5~15% was higher than that of control. It was concluded that 10% and 15% of the Peucedanum japonicum powder could be added for the development of the yanggaeng. According to the above study result, to enhance the utilization of Peucedanum japonicum for developing functional food would be possible, and a new yanggaeng product by adding Peucedanum japonicum would have good potential.

• Advances in materials Research
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• 제1권4호
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• pp.299-310
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• 2012

This article describes the synthesis of a novel N-substituted pyrrole monomer containing an azobenzene group. The 2-[N-ethyl-N-[4-[(4-nitrophenyl) azo]-phenyl] amino] ethyl-3-chloropropionate (RedII) compound was synthesized via reaction of 4-nitro-4'-[N-ethyl-N-(2-hydroxyethyl)-amino] azobenzene (RedI) and 3-chloropropionic acid. RedII was reacted with the potassium salt of pyrrole then 2-[N-ethyl-N-[4-[(nitro phenyl) azo] phenyl] amino] ethyl-N-pyrrolyl propionate (Py-RedII) was prepared. Chemical polymerization of Py-RedII and copolymerization of Py-RedII with pyrrole carried out using $FeCl_3$. Poly (2-[N-ethyl-N-[4-[(nitro phenyl) azo] phenyl] amino] ethyl-N-pyrrolyl propionate) (PPy-RedII) was characterized by UV, IR, $^1HNMR$, $^{13}CNMR$ spectroscopies. Electropolymerization of Py-RedII and electroco-polymerization of Py-RedII and pyrrole were studied using conventional three electrodes system, Ag/AgCl reference electrode, platinum counter electrode and GC disk working electrode. Scanning electron microscopy (SEM), thermogravimetry analysis (TGA) and differential scanning calorimetry (DSC) were used for thermal and rheological studies. The TGA curve of PPy-RedII demonstrated a high thermal stability up to 200°C and its DSC thermogram showed two endothermic peaks at 88 and $122^{\circ}C$. The glass transition temperature of the polymer was found to be above the room temperature. Electrical conductivities of PPy-RedII and it's copolymer with pyrrole (PPy-RedII-co-Py) were studied by the four-probe method and produced conductivities of $7.5{\times}10^{-4}$ and $6.5{\times}10^{-3}Scm^{-1}$, respectively.

• 한국군사과학기술학회지
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• 제14권4호
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• pp.719-725
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• 2011

To apply TMAH-based Py-MS to a field biological detection system for real-time classification of cell-type, reproducible patterns of the TMAH-based Py-MS spectra was known as a critical factor for classification but was seriously disturbed by quantity of cells injected into pyro-tube. This factor is an exterior variable that could not be complemented by improving the performance of the TMAH-based Py-MS instrument. One of idea to solve the knotty problem has been flashed from "Top-down proteomics for identification of intact microoganisms". That is, biomarker peaks are selected from complicate Py-MS spectra for intact microoganisms by tracing out their origins, based on Py-MS spectra for the featured components of different cell-types, in Top-down approach. This idea has been tested in classification of different Gram-type microoganisms. Through the analyses of spectra for the featured components - peptidoglycan and lipoteichoic acid for Gram-positive cells and lipopolysaccharide and lipid A for Gram-negative cells - with comparing to the spectra the corresponding Gram-type cells in the Top-down approach, biomarker peaks were selected to carry out PCA(Principal Component Analysis) in order to see classification of different Gram-types, resulting in significant improvement of their classification. Furthermore, weighting biomarker peaks on intact cell's spectra, based on the data for the featured components of the Gram-types, contributed to elevate classification performance.

• Archives of Pharmacal Research
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• 제27권6호
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• pp.653-661
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• 2004

Fluorescence probes located in different membrane regions were used to evaluate the effect of dopamine$.$HCI on the structural parameters (transbilayer lateral mobility, annular lipid fluidity, protein distribution, and thickness of the lipid bilayer) of synaptosomal plasma membrane vesicles (SPMV), which were obtained from the bovine cerebral cortex. An experimental procedure was used based on selective quenching of 1,3-di(1-pyrenyl)propane (Py-3-Py) by trinitrophenyl groups, and radiationless energy transfer from the tryptophan of membrane pro-teins to Py-3-Py and energy transfer from Py-3-Py monomers to 1-anilinonaphthalene-8-sulfonic acid (ANS) was also utilized. Dopamine$.$HCI increased both the bulk lateral mobility and annular lipid fluidity, and it had a greater fluidizing effect on the inner monolayer than on the outer monolayer. Furthermore, the drug had a clustering effect on membrane proteins.

• Tuberculosis and Respiratory Diseases
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• 제83권4호
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• pp.268-275
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• 2020

Background: It is not evident that the attributable risk of smoking on mortality in Korea has decreased. We investigated the impact of smoking on all-cause mortality and estimated the attributable risk of smoking in Korean adults. Methods: Those aged ≥20 years with smoking history in the Korean National Health and Nutrition Examination Surveys (KNHANES) 2007-2015 were enrolled. We categorized the participants into three groups as follows: never smoker, <20 pack-years (PY) smokers, and ≥20 PY smokers. We applied inverse probability weighting using propensity scores to control various confounders between the groups. All-cause mortality risks were compared between the groups using the Kaplan-Meier log-rank test. The effects of smoking-attributable risks (ARs) on mortality were also calculated. Results: A total of 50,458 participants were included. Among them, 19,334 (38.3%) were smokers and 31,124 (61.7%) were never smokers. Those with a smoking history of 20 PY or more (≥20 PY smokers), those with a smoking history of less than 20 PY (<20 PY smokers), and never smokers were 18.1%, 20.2%, and 61.7%, respectively, of the study population. Smokers had a higher risk of all-cause mortality compared to never smokers (log-rank test p<0.01). The ARs of smoking were 21.8% (95% confidence interval [CI], 5.7%-37.9%) and 9.0% (95% CI, 6.1%-12.0%) in males and females, respectively. ARs decreased from 24.2% to 19.5% in males and from 9.5% to 4.1% in females between 2007-2010 and 2011-2015. Conclusion: Our study using KNHANES IV-VI data demonstrated that smoking increased the risk of all-cause mortality in a dose-response manner and the ARs of smoking on mortality were 21.8% in males and 9.0% in females during 2007-2015. This suggests that the ARs of smoking on mortality have decreased since around 2010.

• Ecology and Resilient Infrastructure
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• 제10권4호
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• pp.125-134
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• 2023

차별적 특징을 갖지 않는 탁도 측정자료에 대한 역추적기법을 개발하고자 지천의 상류와 하류에 위치한 수질자동측정점에서 측정된 실시간 탁도자료와 Py_STPS모형을 사용하여 지천의 유입탁도를 예측하는 세 가지 탁도역추적기법을 비교하였다. 유하시간을 고려한 탁도부하량 단순보존 방법, 유하시간을 고려한 상류경계의 유량을 하류경계의 유량으로 사용하는 방법, 탁도 유발물질의 거동특성을 반영하기 위해 내부반응률을 도입한 방법 세 가지 탁도 역추적기법을 적용하였다. 세 가지 역추적모형의 적용 결과, 내부반응률을 도입한 역추적기법의 결과가 가장 우수함을 확인할 수 있었다.