고급지방산 메틸 에스테르류의 합성 및 소포특성

박종권,김아람,황준배,정노희,Park, Jong-Kwon,Kim, A-Ram,Hwang, Jun-Bae,Jeong, Noh-Hee 한국응용과학기술학회 2015 한국응용과학기술학회지 Vol.32 No.1

고급지방산 메틸 에스테르류의 소포제를 합성하고 FT-IR과 $^1H-NMR$ 분석을 통해 확인하였다. FT-IR을 이용하여 합성된 물질의 특징인 -C=O기는 $1740cm^{-1}$ 부근에서, 그리고 C-O기는 $1175cm^{-1}$ 피크 값을 가지는 것을 확인하였다. 또한 $^1H-NMR$ 분석을 통해 에스테르의 -C=O의 Chemical shift가 2.29 ppm에서 나타나는 것을 확인하였다. 표면장력은 Surface Tensiometer CBVP-43을 이용하여 측정하였다. 표면장력은 17.7에서 21 dyne/cm 값을 가진다. SLS 수용액에서의 소포능은 Ross-Miles법을 통해 측정되었다. 4종류의 소포제 중 소포능은 스테아르산메틸을 이용하여 제조한 소포제가 가장 뛰어난 것으로 측정됐다. In this study, anti-foaming agents of a fatty acid methyl esters was synthesized and confirmed by FT-IR and $^1H-NMR$ spectroscopy. Synthesized material of characteristic of -C=O group having a $1740cm^{-1}$ and -C-O group $1175cm^{-1}$ peak by using FT-IR, and it was confirmed that k. Surface tensions were measured by surface tensiometer CBVP-43. Their surface tension values was 17.7 to 21 dyne/cm. Anti-foaming abilities in the SLS solution was measured through the Ross-Miles method. Performance of the 4 type of anti-foaming agent was determined and the best anti-foaming agent was prepared using stearic acid methyl.

국내 보강토 옹벽 적용 현황 및 문제점 조사 연구

박종권(Park Jong-Kwon),이광우(Lee Kwang-Wu) 한국토목섬유학회 2012 한국지반신소재학회 논문집 Vol.11 No.1

1980년 국내에 현대적인 보강토 옹벽이 도입된 이후 최근에는 경제성, 수려한 외관, 시공성 등의 장점으로 인해 보강토 옹벽이 기존의 콘크리트 옹벽을 급속히 대체하고 있다. 이에 본 논문에서는 국내 보강토 옹벽 시장의 현황 및 문제점을 조사, 분석 하였다. 보강토 옹벽 시장의 확장과 더불어 벽체변형, 전면블록의 균열, 전반활동 등과 같은 피해사례가 증가하고 있으며, 이러한 문제는 주로 부적절한 설계와 시공관리에 기인한다. 또한 보강토 옹벽 시장의 급속한 성장성에 비해 설계 및 품질관리 등에서의 기술적인 수준이 높지 않은 것으로 파악되었다. 따라서 보강토 옹벽의 설계 및 시공에 대한 통일된 기준이 시급히 마련되어야 한다. 또한 보강토 옹벽의 품질을 향상시키기 위해서는, 설계, 시공 및 경제성에 대한 보다 세심한 검토가 요구된다. Since the modem reinforced soil wall technology was introduced in domestic civil engineering society in the year 1980, the reinforced soil walls have been extensively used because these technologies have advantages such as economical efficiency, graceful appearance, and easy construction. This paper describes the application of reinforced soil wall, design criteria, and construction problems. Many cases of troubles, which include a severe deformation of facing, cracks of facing block, overall sliding failure and so on, have been reported. Inappropriate design and construction management mainly induce these problems. The technological level of design and quantity control for reinforced soil wall is not sufficiently supported to cope with the growth quantity of reinforced soil wall construction market and the increasing number of construction companies. The unified standard design and construction criteria of reinforced soil wall should be established with the detail consideration of overall performance and stability. The quality control of design and construction, and cost of construction must be seriously executed to construct a high quality of reinforced soil wall.

계면활성제의 종류에 따른 수성 아크릴 접착제의 물성변화

박종권 ( Jong-kwon Park ),정노희 ( Noh-hee Jeong ) 한국공업화학회 2017 공업화학 Vol.28 No.4

본 실험은 다양한 계면활성제를 이용해 수성 아크릴 에멀젼 접착제를 제조하고 그 특성을 조사하였다. 제조한 접착제의 특성으로 고형분, 전환율, 입도분포, 초기접착력 등의 물성을 통해 비교하였다. 접착제의 고형분을 측정한 결과는 60% 이상의 높은 값을 나타냈으며 에멀젼 중합의 전환율은 합성한 계면활성제를 2 wt% 농도로 첨가하였을 때 97%로 측정되었다. 입도분포의 분석 결과는 양이온 계면활성제를 첨가한 경우에 290∼470 nm의 작은 입자의 접착제가 제조되었고 초기접착력과 접착 발현시간 또한 증가되었다. 최대 접착력은 단일의 계면활성제(POE 23)를 사용했을 때 2.55kgf의 값을 나타냈고 다른 계면활성제를 사용한 경우보다 뛰어나다는 것을 알 수 있었다. 양이온 제미니 계면활성제를 첨가하여 제조한 접착제의 부식방지력은 48 h 동안 유지되는 것을 확인할 수 있었다. In this study, aqueous acrylic emulsion adhesives were prepared using various surfactants and their properties were also investigated. Solids content, conversion, particle size distribution and initial adhesion properties of the prepared adhesives were compared with each other. The solid content of the adhesives was evaluated 60% and the conversion rate of the emulsion polymerization was 97% at 2 wt% concentration of synthesized surfactants. The particle size distribution analysis revealed that the size distribution of adhesive particles was 290∼470 nm when the synthesized cationic surfactant was added. The initial adhesion and adhesion time were also improved. The maximum adhesive strength was found to be 2.55 kgf when using a single surfactant (POE 23), and superior to that of using other surfactants. It was confirmed that the corrosion inhibition of the adhesive prepared by adding the cationic gemini surfactant was maintained for 48 hours.

레몬그라스 오일을 함유하는 PCL마이크로캡슐의 특성과 방출거동

박종권 ( Jong Kwon Park ),김지은 ( Ji Eun Kim ),정노희 ( Noh Hee Jeong ) 한국공업화학회 2015 공업화학 Vol.26 No.3

In this study, poly ε-caprolactone(PCL) microcapsules containing lemongrass oil was prepared by the solvent evaporation method. Effects of concentrations of PCL and poly vinyl alcohol (PVA) as well as stirring speeds when preparing microcapsuleswere investigated. Specific peaks of lemongrass oil in PCL microcapsules at 1600 and 2900 cm-1 were observed by FT-IR. The particle size and shape of microcapsules were also measured by polarizing microscope and optical microscopy. The average particle size of microcapsules decreased with increasing the stirring rate. At the stirring speed of 1500 rpm, and 1 wt% of each PCL and PVA concentrations, the smallest particles were formed. Collection efficiencies of lemongrass oil of 77.5% and 69.5% were obtained when 1.5 wt% of PCL and 2 wt% of PVA were used, respectively. In addition, the release behavior and antioxidant activity of lemongrass oil from PCL microcapsules were examined using UV-Vis spectrophotometry. When 0.5 wt% PCL and 2.0 wt% PVA were used with the slow stirring rate, microcapsules showed a fast release rate. The characteristics of antioxidant activity exhibited similar to that of the release behavior.

심내막염에 속발한 상장간막동맥의 진균성 동맥류 1예

박종권(Jong-Kwon Park),이형근(Hyoung Guen Lee),정민(Min Jung),박동국(Dong Guk Park),김정택(Jung Taik Kim),김덕환(Duck Hwan Kim) 대한외과학회 1998 Annals of Surgical Treatment and Research Vol.55 No.1

생쥐에서 간문맥수혈에 의한 췌장도세포동종이식 후 이식생존율의 향상

박종권(Jong Kwon Park) 대한외과학회 2007 Annals of Surgical Treatment and Research(ASRT) Vol.72 No.6

Purpose: Considering the complications of nonspecific immunosuppression, as well as the availability of insulin, heavy immunosuppressive treatment to pancreatic islet transplantation patients is not justified. Antigen administration via the portal vein has been demonstrated to induce immunosuppression, and may present a possible mechanism for the induction of tolerance. Using a mouse model, without any immunosuppressive treatment, the islet allograft survivals were compared between portal venous transfusion and portal venous saline injection groups. Methods: Six C57BL/6J mice were used as pancreatic islet donors per Balb/c recipient mouse. Islets were harvested by digestion of the pancreata with collagenase, with subsequent Ficoll density gradient separation. Recipient mice were divided into two groups: seven mice received a portal venous injection of 0.1 cc saline (PVS) and eight a portal venous transfusion of 0.1 cc donor blood (PVT). Islets were transplanted into the subcapsular space of the left kidney. Transplantation failure was determined if the transplanted mouse failed to show a blood glucose level less than 200 ㎎/㎗ at 24 hours after the transplantation; these mice were not included in the statistics. Rejection was determined when the normalized blood glucose level (<200 ㎎/㎗) returned to above 300 ㎎/㎗. Results: The mean islet equivalent numbers (IEQ) of the seven PVS and eight PVT mice were 893±262 and 911±288, respectively. The islet allograft survival of the PVS group ranged between 1 to 9 days; whereas, that of the PVT group ranged between 6 to 16 days. The PVT group showed significantly higher islet allograft survival than the PVS group (P=0.0443). Conclusion: A portal venous transfusion prolonged the islet allograft survival.

이혼에 따른 재산분할의 합리적 산정

박종권 ( Park Jong-kwon ) 한국외국어대학교 법학연구소 2007 외법논집 Vol.26 No.-

The forms of legislation on Property division are different from country to country, but roughly divided into two forms; one is the legislation giving judges broad discretion about deciding the proportion of property division, and the other the legislation that has fixed rules. They have their own efficiencies and deficiencies, so, more important thing is keeping balance between the two extreme poles. The right of claim for the division of property means that each party, in a divorce suit, claims to the other an appropriate division of the property accumulated during their marital life. In general, this claim is required to recognize the couple’s substantial contribution to the accumulated property, regardless of its being in husband or wife’s name, and guarantee the equality between the sexes during their marital life. The claim for the division of property should be discussed together with the matrimonial property system since they are mutually dependent. In the latter, the common property system makes it possible that the property is appropriately divided for the party according to principles of the equality between the sexes in a divorce suit, whereas the separate property system does not. This claim for the division of property has almost the same effect as the common property system, and is also very useful since it maintains that each party should be responsible for supporting the other who gets into destitution after divorce, but Korea has not. And so, it would be desirable that the claim stipulated in Sub-Sec. 2 of Sec. 839 of the Korean civil law should be adaptable interpreted in terms of general principles of the responsibility for supporting after divorce. Korean Civil Cede has only one article about property division giving judges broad discretion. But before changing the law, we have to arrive the social consensus on equal division and the family courts have starting point of equal division when determining the proportion of property division, and such court decisions be supported by social consensus. Consequently, we have to pursue both the reform of legislation and the social change toward the equal division.

서울의 오피스빌딩 시장에서 자본자산가격결정모형(CAPM) 의 적용가능성

박종권(Park, Jong-Kwon),전재범(Jun, Jae-Bum) 대한건축학회 2015 대한건축학회논문집 Vol.31 No.8

This research aims to find out the impact of systematic risk on risk-premium and understand if CAPM (Capital Asset Pricing Model) is applicable to office building market at Seoul city in South Korea. In light of this notion, this research, specifically, considers four different office building markets in Seoul city area, called GBD(Gangnam Business District), YBD(Yeouido Business District), CBD(Central Business District), and Other Business District, to figure out whether there exists any positive-linearity between systematic risk and risk-premium for each business district. Afterward, this research seeks to verify applicability of CAPM to four office building markets based upon Black, Jensen, and Scholes(1972)"s statistical method. Finally, the results show some meaningful findings that there is positive linear-relationship between systematic risk and risk-premium in all business districts apart from YBD, which means capital-asset could be fairly priced in GBD, CBD, and other Business District, and that the applicability of CAPM should be only taken into account in Other Business District.

생쥐의 췌장도세포추출을 위한 콜라겐분해효소 용액 주입 시 쓸개와 총담관 경로의 비교

박종권(Jong Kwon Park) 대한외과학회 2007 Annals of Surgical Treatment and Research(ASRT) Vol.73 No.1

Purpose: A high yield of viable pancreatic islets is an essential prerequisite for the study of pancreatic islet transplantation. The purpose of this study is to compare the yield between intra-gall bladder (intra-GB) and intra-common bile duct (intra-CBD) injection of collagenase solution for isolation of mouse pancreatic islets. Methods: The mice were divided into two groups, the intra-GB and intra-CBD groups, and each group included twelve mice, respectively. Collagenase solution was injected via the gallbladder in the intra-GB group mice, while this was done via the common bile duct in the intra-CBD group. After removal and digestion of the mouse pancreases, the pancreatic islets were isolated by Ficoll density gradient centrifugation and hand picking. Results: The intra-GB group yielded 121.67±39.86 IEQs, and the intra-CBD group reveled 168.17±29.23 IEQs. There was a statistically significant difference in islet yield between the two groups (P=0.005, Mann-Whitney Test). The purities of the isolated islets were 86.42±3.99% for the intra-GB group and 87.17±4.47% for the intra-CBD group, and there was no difference between the two groups (P=0.755, Mann-Whitney Test). Conclusion: Both the intra-GB and intra-CBD groups yielded an average of >120 IEQs. However, the intra-CBD group revealed a higher yield than the intra-GB group for isolating mouse pancreatic islets.

DTN 에서 보안 강화를 위한 Queue 관리 방법

박종권(Jong Kwon Park),홍충선(Choong Seon Hong) 한국통신학회 2010 한국통신학회 학술대회논문집 Vol.2010 No.11