好氣性 固定床 生物膜 反應槽의 메디아로 폐칫솔의 利用可能性 檢討에 관한 基礎硏究 : 처리효율을 중심으로

임채영,김정권,성낙창,신남철,김형석,전기일 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.1

This study was conducted to evaluate the possibility to apply the waste toothbrush to aerobic fixed biofilm reactor for media. The media used for this research was waste toothbrush (WTB) and Pall-Ring. The feed used for this research was synthetic wastewater which was made at the laboratory. The COD, NH₄^(+)- N and PO₄^(-3)-P removal efficiency variations with the organic loading rate was examined at this research. The conclusions drawn from these experiments are listed below : 1. When the influent COD concentration was respectively 300mg/ℓ, 600mg/ℓ, the COD removal efficiency was decreased with the increase of the organic loading rate and the COD removal efficiency for Pall-Ring was higher than the COD removal efficiency was 0.4~1.9%. 2. When the influent NH₄^(+)-N concentration was respectively 13mg/ℓ (COD 300mg/ℓ), 25mg/ℓ (COD 600mg/ℓ ), the NH₄^(+)-N removal efficiency for Pall-Ring was slightly higher than the NH₄^(+)-N removal efficiency for Wastetooth brush. The difference of NH₄^(+)-N removal efficiency was about 0.5~1.5%. 3. When the influent PO₄^(-3)-P concentration was respectively 7mg/ℓ (COD 300mg/ℓ), 14mg/ℓ (COD 600mg/ℓ ), the PO₄^(-3)-P removal efficiency for Pall-Ring was higher than the PO₄^(-3)-P removal efficiency for Wastetooth brush. The difference of PO₄^(-3)-P removal efficiency was about 1.1~2%. 4. COD, NH₄^(+)-N and PO₄^(-3)-P removal efficiencies show very small difference between Pall-Ring and Wastetooth brush as media. So it was showed that wastetooth brush can be used as media very successfully.

비유기중의 소유방염에 대한 항균펩타이드(Buforin Ⅱb)의 효능실험

김인송,권성균,임형준,이완규 한국수의공중보건학회 2002 예방수의학회지 Vol.26 No.3

Recently, a novel antimicrobial peptide including Buforin II has been emphasized to kill multi-drug resistant bacteria and avoid promoting multi-drug resistance. This study evaluated the efficacy of an antimicrobial peptide (Buforin IIb) on bovine mastitis. Based on the Minimum inhibitory concentration(MIC, 4 g/ml) of Buforin IIb, syringes were made five concentration(MIC×10, ×50, ×100, ×300, and ×500). Thirty three cows(38 quarters) with bovine mastitis were selected using California mastitis test and grouped in dependant on drug concentration and treatment duration. Each group treated by intramammary infusion twice a day for 3 5 days. The milk samples of 5 groups were aseptically collected from quarters at 0, 3, 7 and 14 days, and 2 groups were collected at 0, 5, 9 and 14 days after first treatment. Collected samples were used for bacterial culture and somatic cell count. Bacterial number(log_(10) mean CFU/ml) was decreased in dependant on drug concentration and extending treatment duration. In group D(MIC×300), bacterial number was decreased from 4.59±0.10(day 0) to 2.89±1.37(day 3), 4.04±0.33(day 7), and 4.19 ± 0.10(day 14), respectively(p 0.05). Bacterial number of B2(MIC×50, 5 days treated) is decreased, approximately 10%, than group B1(MIC×50, 3 days treated). Somatic cell count of group D was slightly decreased from 11,100(×10³)(day 0), to 7,386(×10³)(3 day), 6,886(×10³)(day 7), and 9,661(×10³)(day 14). Staphylococcus spp., was the most common isolate, was bacteriologically cured 100% by Buforin IIb treatment. Overall results indicate that Buforin IIb could have possibility to cure bovine mastitis, if higher concentration over experimental concentration were treated with extending treatment duration.

Experimental consideration of the Hansen solubility parameters of as-produced multi-walled carbon nanotubes by inverse gas chromatography

Lim, Hyeong Jun,Lee, Kunsil,Cho, Young Shik,Kim, Yern Seung,Kim, Taehoon,Park, Chong Rae The Royal Society of Chemistry 2014 Physical chemistry chemical physics Vol.16 No.33

<P>The Hansen solubility parameters (HSPs) of as-produced multi-walled carbon nanotubes (APMWCNTs) were determined by means of the inverse gas chromatography (IGC) technique. Due to non-homogeneous surfaces of the APMWCNTs arising from defects and impurities, it was necessary to establish adequate working conditions for determining the HSPs of the CNTs. We then obtained the HSPs of the APMWCNTs and compared these results with earlier reports as determined by using sedimentation and molecular dynamics simulation methods. It was found that the determination of the HSPs of the CNTs by IGC can give an enhanced determination range based on the adsorption thermodynamic parameters, compared to the HSPs determined using sedimentation methods. And the HSPs of the APMWCNTs, determined here, provided good guidelines for the selection of feasible solvents that can improve the dispersion of the APMWCNTs.</P> <P>Graphic Abstract</P><P>HSPs of the APMWCNTs were determined by the IGC method. They provided forecasting of dispersibility of APMWCNT colloidal solutions and good guidelines for the selection of feasible solvents. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4cp02319f'> </P>

The Hypocholesterolemic Effects of Lactic Acid Bacteria Isolated from Human Intestine and Rutin Extracted from Buckwheat in SD Rats Fed High Cholesterol Diet

Hyeong-Jun Lim,So-Young Kim,Seok-Hwan Na,Chul-Sung Huh,Sang-Myeong Lee,Wan-Kyu Lee 한국실험동물학회 2006 Laboratory Animal Research Vol.22 No.4

High level of blood cholesterol is one of the most important risk factor related with coronary heart disease and atherosclerosis. The main objective of this study was to investigate the cholesterol-lowering effect of lactic acid bacteria (LAB) isolated from human intestine and rutin extracted from buckwheat in high cholesterol-diet fed Sprague-Dawley rats. In addition, it was determined whether intestinal microflora composition is improved by LAB and/or rutin consumption. Five-week old male rats were administrated with 0.59 ㎎/㎏ B.W. of rutin and/or 1.5 × 10⁹-6 × 10⁹ cfu/㎏ B.W. of LAB as an oral route with cholesterol diet for 6 weeks. Total cholesterol, triglyceride, low-density lipoprotein (LDL)-cholesterol, and high-density lipoprotein (HDL)-cholesterol levels in blood were determined biweekly. The levels of total cholesterol, triglyceride and LDL-cholesterol were significantly decreased in rats administrated with rutin (Group A) compared to Positive control group at 4 weeks. Rats administrated with rutin and LAB (Group C) showed also a significantly reduced triglyceride and the ratio of LDL against total cholesterol, and increased the ratio of HDL. The relative liver weights were significantly decreased in all treated groups compared to positive control group at 6 weeks. In bacteriological analysis, the number of Streptococcus and Lactobacillus was significantly increased in rats administrated with LAB (Group B). On the other hand, the number and the frequency of occurrence of Enterobacteriaceae were significantly decreased in Group B. This study suggested that combined administration of rutin and LAB has a hypocholesterolemic effect and could be used to prevent coronary heart disease and atherosclerosis as well as fatty liver. In addition, they would make an improvement of the intestinal microflora composition by decreasing putrefactive bacteria and increasing LAB.

한려해상국립공원의 탐방행태

임준형 ( Jun Hyeong Lim ),이광배 ( Kwang Bae Lee ),모수원 ( Soo Won Mo ) 한국도서학회 2014 韓國島嶼硏究 Vol.26 No.2

The main purpose of this paper is to show the effects of exchange rate and industrial production on the visiting demand of Hallyeo Marine National Park(Hallyeohaesang National park) using econometric tools. The study was conducted by modelling the visiting demand as exchange rate, industrial production, and seasonal dummies. All series span from January 2008 to December 2013. We first checked whether the series and model were stationary at a 5 percent significance level. The statistical result noted that we should not reject the null hypothesis of a unit root in all variables and of a unit root for residuals at the 5 percent significance level (cointegration regression was used). We also made use of forecast error decomposition and historical decompositions. After 12 months, the proportions of the forecast error variance of visitors alone were around 70 percent in all of three ordering combinations. All in all, innovation accounting indicates that visitors are somewhat exogenous towards exchange rate and business activity. The historical decomposition for visitors, however, shows that the difference between economic variables and visitors is negligible since both exchange rate and industrial production move closer to the actual data. We also made use of impulse response functions, which are widely used to examine how movement in one variable can be explained by innovations in different variables and how fluctuations in one variable can be rapidly transmitted to another. The impulse responses indicate that visitors decrease sharply to the shocks in exchange rate and decay quickly to its pre-shock level. Visitors also respond positively to the shocks in business activity and disappear very slowly, which shows that the shocks last very long.

연구논문 : 광주광역시 휴면 협동조합 실패원인과 재기를 위한 선행과제

임준형 ( Jun Hyeong Lim ) 전남대학교 지역개발연구소 2015 지역개발연구 Vol.47 No.2

최근 협동조합이 왜 휴면상태가 되었는지를 규명하기 위하여 실패 원인을 파악하였다. 그리고 실패 원인을 토대로 재기를 위한 선행과제가 무엇이고 그에 따른 정책 방향을 제안하는 것이 본 논문의 목적이다. 분석결과를 보면 전문가와 조합원 사이에 입장차이가 존재하였다. 즉, 전문가는 실패 원인을 협동조합 가치 중심의 원칙적 접근을 하고 있는데 반해, 현장 조합원들은 전반적으로 외부 지원 부족을 원인으로 보고 있으며, 특히 경영지원의 절박성을 내포하고 있다. 이러한 점은 앞으로 협동조합 정책에 반영 되어야 할 것으로 보인다. 그러나 협동조합 가치가 왜곡된 경영치중 현상을 완화할 보완적 조치가 전제 되어야 한다. 따라서 이러한 전문가와 조합원의 실패원인 괴리를 어떻게 줄일 것인가가 문제해결의 핵심이며 재기를 위한 출발점이 될 수 있다. This study identified reasons for failures in resting cooperatives, aiming to develop strategies for their revival based on the reasons for their failures and suggest policies to prevent future failures. As a result, it was discovered that there were differences in positions between experts and cooperative members. That is, experts attempted to understand the reasons for failure through a value-oriented approach while cooperative members desperately expected active support from management. In this respect, focus should be given to the policies of cooperatives. However, from a long-term perspective, a complementary measure to mitigate distorted manager centric phenomenon should be developed. Therefore, the key to a solution, and a starting point for cooperative rechallenge, is in how to reduce differences in positions that influence the reasons for failure.

HS하에서의 한ㆍ중ㆍ일 전자집적회로의 수출경쟁력

임준형(Jun-Hyeong Lim) 한국관세학회 2011 관세학회지 Vol.12 No.3

The main purpose of this study is to find policy suggestions by empirically analyzing the export competitiveness of Electronic Integrated Circuits Industry of Korea, China, and Japan. The empirical analysis is mainly based on different measures of TSI, RCA. To calculate these indices of Electronic Integrated Circuits Industry of Korea, China, and Japan for the period of 2007-2010, the korea International Trade Association Data are mainly used. The empirical results show that 854232, 854290 items of Korean Electronic Integrated Circuits Industry has export specialization in against world markets, but 854231, 854233, 854239 items have comparative disadvantage. therefore diversification strategy of export market and strengthening strategy of export competitiveness should be enforced.

전자무역 : 국제물류업체의 정보기술(Information Technology) 수용에 관한 실증적 연구

임준형 ( Jun Hyeong Lim ) 한국통상정보학회 2010 통상정보연구 Vol.12 No.1

헬름홀츠 공명기를 이용한 콘덴싱 보일러 배기음 저감

임형준(Hyeong Jun Lim),권병하(Byoung Ha Kwon),김일광(Il Kwang Kim) 한국소음진동공학회 2017 한국소음진동공학회 학술대회논문집 Vol.2017 No.10

Nord2000의 철도차량 분류기준에 따른 소음지도 결과 비교

임형준(Hyeong Jun Lim),박재식(Jae Sik Park),함정훈(Jung Hoon Ham),박상규(Sang Kyu Park) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.4

Recent development of related technologies and efficient utilization of the entire country for the purpose of railway construction, and plans are being accelerated. the railway noise has been improved by increasing the high speed railway station, and accelerating the existing trains. Nord2000 which is an overseas noise prediction equation could not be applied directly to the domestic railway vehicles. So the specific vehicles in the Nordic countries which is a similar specification to domestic trains should be selected. Nord2000s accuracy was compared to Schal103, CRNs. Prediction of Ground impedance and Roughness class carried out at different. In this paper, the result of selected vehicles for Nord2000 was as follows. S-laX2 was for express trains, N-*2c-3b was for Mugunghwa, S-Pass/wood was for Saemaul, N-4a was for freight trains, N-3a was for subway. the calculation time for Nord2000 took longer than others. in addition, Ground absorption was indispensable to calculate a noise map for Nord2000. As a result, CRNs prediction noise levels at Wonju-si was closest to the measurements. However, the predicted noise levels of Nord2000 was the most accurate.