비만 개선 효과를 지닌 탄수화물 및 지방 흡수 억제 기능성 식이조성물 개발

윤유식,최선미,홍순복,홍정미,김정원,이홍석,홍성길 한국조리과학회 2002 한국식품조리과학회지 Vol.18 No.3

In a previous study, we developed a new food additive as an egg yolk antibody (IgY) against carbohydrate digestion enzymes for the regulation of blood glucose level and weight control. The IgY delayed and decreased the increment of blood glucose level after administration of sucrose in human being by 30% in 20∼30 min. We also developed a lipase inhibitor as a water extract of two kinds of herb, Platycodon grandiflorum and Solanum melongena. Twenty three volunteers were subjected to the intake of the egg yolk IgY plus the herbal extracts for 50 days. In average, the treated subjects appeared to lose 1.96 ㎏ of body weight and 3.4 ㎏ of body fat mass during the treated period. Furthermore, Panniculus adiposus and breech size were significantly decreased during the experimental period. Above results suggested that the administration of the dietary additives composed of egg yolk IgY and natural herbal extract improve the obesity by the decrement of body weight and body fat mass.

효율적인 혐기성소화를 위한 슬러지전처리 신공정

최홍복,신응배,황경엽 漢陽大學校 環境科學硏究所 1996 環境科學論文集 Vol.17 No.-

본 연구는 2차 슬러지의 전처리가 혐기성 소화에 미치는 영향에 관한 연구로 슬러지를 기계적으로 분사 및 충돌시키는 전처리공법에 대한 연구이다. 본 전처리공법의 핵심은 슬러지를 구성하고 있는 미생물 세포를 파괴하는 것으로 이를 위하여 슬러지를 기계적으로 가압하에 분사, 충돌시킨 물리적 힘으로 세포막을 파손시켜 내부 단백질을 노출시켰다. 실험결과 충돌 전후 시료의 단백질 농도 변화가 뚜렷이 나타났다. 단백질 농도는 분사압력이 증가 할 수록 또한 분사횟수가 증가할 수록 높아졌다. 전처리한 슬러지를 회분식 혐기성소화 실험한 결과 체류시간 2∼26일에서 13∼50%의 VS제거효율을 나타냈다. 반면에 같은 운전조건에서 전처리하지 않았을 경우 2∼35%의 VS제거효율을 나타내서 하수의 2차슬러지를 기계적으로 전처리 할 경우에 월등히 높은 혐기성 처리효율을 보이고 있는 것으로 나타났다. This research investigates the effectiveness of sludge pretreatment as it affects the subsequent anaerobic digestion of waste-activated sludge(WAS). The key of this pretreatment process is that bacteria cells in the WAS are ruptured by mechanical jet and smash under pressurized conditions. The protein concentrations in the sludge vary significantly before and after pretreatment. Protein concentration increases according to pressure and smash times. In batch experiments, the removal efficiencies of volatile solids (VS) were 13∼50% when the WAS is pretreated once under 30 bar fed into an anaerobic digester with 2∼26day retention time. Under the same operating conditions, when intact WAS is fed into the digester, VS removal efficiencies are 2∼35%. It is observed that higher digestion efficiencies of sludge can be obtained through mechanical pretreatment of sludge.

호텔원가회계 개선방안에 관한 연구 : Activity-Base Costing 시스템을 중심으로 Activity-Base Costing Accounting

최해수,김동훈,안홍복 慶北大學校出版部 1994 經商論集 Vol.22 No.4

CFSRT를 포함하는 PFR구성 및 고농도 폐수처리

최홍복 漢陽大學校 環境科學硏究所 2003 環境科學論文集 Vol.24 No.-

유체유동에 의해서 다단 상향류식 반응기를 구성하고 r가 단은 CFSTR(Continuous -Flow Stirred-Tank Reactor) 형태이나 전체 반응기는 PFR(Plug Flow Reactor) 형태를 유지할 수 있도록 하여 고농도 난분해성 폐수(축산폐수, 산업폐수)의 분속해도와 분해된 물질의 분리효과 및 효율개선에 대한 연구를 수행하였다. 추적자 실험을 통하여 본 실험에 사용 된 반응기(Eco Reactor, ER)가 PFR 반응기에 매우 접근하고 있다는 사실을 밝혀냈다. PFR형태 반응조의 특징으로 나타나는 요소로써 NaOH 추적자 test 결과 이론적인 체류시간의 70% 범위까지 토출된 추적자의 부하량은 71% 이상으로 나타났다. 반면에 반응조의 MLSS의 농도 분포도, 유입수 유기물 농도분포도, 용존 산소전달효율은 1단에서 50±5% 2단에서 35±7% 3단에서 15±8%로 나타났다. 이와 같은 PFR 반응기의 특징과 용존산소의 효율의 증가, 교반효과 증가 등으로 유기물 제거속도는 일반 SR 포기조보다 2배이상 증가하는 것으로 나타났다. This research investigates to increase the biodegradation rate and solids separation of high concentration refractory wastewater (livestock wastewater, industrial wastewater) in the fluids fluctuation reactor, ER(Eco Reactor), which is composed of the PFR (Plug Flow Reactor) pattern in the total structure but to appear CFSTR (Continuous -Flow Stirred-Tank Reactor) in the stage unit structure. We discovered the fact that ER approached to PFR pattern through a tracer experiment. The special feature of the PFR reactor type is observed that the effluent tracer loading rate including within 70% range of theoretical retention time is over 71%. MLSS concentration distribution, influent organics and DO transfer efficiency are to appear 50±5%, 35±7%, and 15±8% in the first, second, and third stage, respectively. It is observed that the removal rate of organics increase over twice as many as a normal SBR(Sequencing Batch Reactor) because of the PFR feature, high oxygen transfer efficiency, mixture effects and so on.

MgO-Cr₂O₃캐스타블의 화학적 손상에 관한 연구

최익대,이윤복,박홍채,오기동 부산대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.59 No.-

마그-크롬질 캐스타블에 대한 내알칼리성 증진에 의한 수명 향상의 가능성을 검토하였다. 골재로서 전융 알루미나, 크롬질, 소결 스피넬, 마그-크롬질, 마그네시아질 순으로 알칼리 침식에 대한 저항성이 우수하였다. 마그-크롬질은 다른 골재에 비하여 알칼리에 대한 침식저항성 뿐만 아니라 열충격에 대한 저항성이 양호하였다. 장시간 적용 시험시 β-2CaO · SiO2.3CaO · SiO2 및 K2SO4가 존재하였고 조직 취화를 초래하여 가동면에서 손상을 가속하였다. 전융 마그네시아를 사용한 경우 소결 마그네시아질에 비하여 재질 변경 및 조직 치밀화로 인하여 알칼리에 대한 침식 억제 효과가 있었다. For long life of applications in MgO-Cr2O3 castables, the improvement of chemical resistance against alkali salts were investigated. Chemical resistance against alkali salts was excellent in order, i.e fused alumina, chrom ore, sinterded spinel, Magnesia-chrome, magnesia based castables. magnesia-chrome based tastable was comparatively good in the chemical attacks and the thermal resisatnce. As working for long time, β-2CaO · SiO2, 3CaO · SiO2 and K2SO4 were existed, and they accelerated chemical wear in the working area of magnesia-chrome castables caused the degreaded microstructure. The chemical resistance of fused magnesia in MgO-Cr2O3 castables showed the more excellent than that of the sintered magnesia due to the densification of mircrostructure and the change of materials

장애인 수상 스포츠에 대한 문헌연구

최승오,홍복교 江原大學校 附設 體育科學硏究所 1998 江原大學校附設體育科學硏究所論文集 Vol.- No.22

저항방사열계 적외선 감지기 제조를 우한 바나듐 산화막의 전기적 특성 및 유전 특성

박재홍,최용남,최복길 공주대학교 생산기술연구소 2000 論文集 Vol.8 No.-

For fabrication of bolometric infrared detector, thin films of vanadium oxide(VO_x) was deposited by r.f. magnetron sputtering from V_2O_2 target in 10% gas mixture of argon and oxygen, and in-situ annealed in vacuum with different temperatures and times. Crystal structure and surface morphology of films were characterized through XRD and SEM. In order to measure the current-voltage characteristics, temperature dependence of conductance, and dielectric properties of vanadium oxide, Al/VO_x/Al sandwich devices structure was adopted. The films prepared below 200℃ were amorphous, and those prepared above 300℃ were polycrystalline. Above 3×10^4V/cm conduction of vanadium oxide is limited by space charge formed near eletrode. Conduction mechanisms above 10^5V/cm are due to Schottky emission and Fowler-Nordheim tunneling effects. Resistance and capacitance of grain boundary are decreased with increasing annealing temperature. Oxygen vacancy is related to the localized state and non-stoichiomeric of vanadium oxide.

저항방사열계 적외선 감지기 제조를 위한 바나듐 산화막의 전기적 특성 및 유전 특성

박재홍,최용남,최복길 공주대학교 생산기술연구소 2000 論文集 Vol.8 No.-

For fabrication of bolometric infrared detector, thin films of vanadium oxide(VO_(X)) was deposited by r.f. magnetron sputtering from V_(2)O_(5) target in 10% gas mixture of argon and oxygen, and in-situ annealed in vacuum with different temperatures and times. Crystall structure and surface morphology of films were characterized through XRD and SEM. In order to measure the current-voltage characteristics, temperature dependence of conductance, and dielectric properties of vanadium oxide, Al/VO_(X)/Al sandwich devices structure was adopted. The films prepared below 200℃ were amorphous, and those prepared above 300℃ were polycrystalline. Above 3×10^(4)V/cm conduction of vanadium oxide is limited by space charge formed near electrode.? Conduction mechanisms above 10^(5)V/cm are due to Schottky emission and Fowler-Nordheim tunneling effects. Resistance and capacitance of grain boundary are decreased with increasing annealing temperature. Oxygen vacancy is related to the localized state and non-stoichiomeric of vanadium oxide.

國民學敎 6學年 學生의 科學學力 調査 : 國民學生 科學學力 競試大會 結果 分析 Based on the result of science olympiad for elementary school students

河炳權,崔榮宰,李溶馥,崔泓琯 서울교육대학교 과학교육연구소 1994 科學과 數學敎育 論文集 Vol.20 No.-

연령증가에 따른 생쥐 혈액-가슴샘 관문의 미세구조

안의태,최석봉,고정식,경홍기,한영복 대한해부학회 1994 Anatomy & Cell Biology Vol.27 No.4