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n-Capric Acid 또는 n-Capric Acid Methyl Ester 첨가와 저장온도에 따른 김치의 발효특성
김병용(Byung Yong Kim),김명환(Myung Hwan Kim),안태영(Tae Young Ahn) 한국응용생명화학회 1999 Applied Biological Chemistry (Appl Biol Chem) Vol.42 No.2
This study was conducted to investigate the effects of n-capric acid(CA) or n-capric acid methyl ester (CE) addition during salting process, and fermentation temperature on chemical and microbial changes of Kimchi. The pHs of control, CA and CE were 3.78, 4.28 and 4.35 after 6 days of storage at 20℃ and were 3.85, 5.14 and 5.10 after 42 days of storage at 4℃, respectively. The effects of CA or CE addition at 4℃ were higher than those at 20℃. The maximum edible acidity, 0.75%, was reached within 3 days at 20℃, 15 days at 12℃, and the acidity of 42 days at 4℃ was 0.62% which was still lower value than the maximum edible acidity. Total bacteria, Leuconostoc, Lactobacillus and yeast counts of the control were higher value than those of the treatments throught the whole fermentation period. The addition of CE at 4℃ had much affected the reduction of yeast count. As microbial counts and reduction rates of control and treated Kimchi increased with increasing the storage temperature.
GEANT4를 이용한 선형가속기 기초 코드 작성과 전자선 에너지 분포 계산
조영걸,김형동,김병용,김성진,오세안,강정구,김성규,Joh, Young-Gull,Kim, Hyung-Dong,Kim, Byung-Young,Kim, Sung-Jin,Oh, Se-An,Kang, Jeong-Ku,Kim, Sung-Kyu 한국의학물리학회 2011 의학물리 Vol.22 No.2
GEANT4 Medical Linac 2 예제 코드를 이용하여 선형가속기 전자선의 에너지 분포를 계산하였다. 입사 전자의 평균 에너지는 6, 9, 12, 16, 20 MeV이었으며, 전자선 특성에 영향을 주는 전자선 산란박 물질, 두께, 위치에 따른 에너지 분포를 계산하였다. 산란박 물질은 납, 구리, 알루미늄, 금을 사용하였다. 산란박 위치를 변경하여 선형 가속기 헤드 속 산란박 위치가 전자 및 광자 에너지 분포에 미치는 영향을 분석하였다. 의료용 선형가속기 시뮬레이션의 기초자료인 에너지 분포에 대해 여러 가지 산란박 조건을 적용하여 경향을 나타내었다. 이 결과는 선형가속기 헤드 설계에 이용될 수 있을 것으로 본다. The energy spectra for electron beam of medical linear accelerator were calculated using a GEANT4 Medical Linac 2 example code. The incident electron mean energy were 6, 9, 12, 16, 20 MeV. This code was designed to calculate electron beam energy spectra according to material, thickness and location of electron scattering foil affecting electron beam characteristic. Lead, Copper, Aluminum and Gold were used for scattering foil. The energy distribution for electron and photon were analyzed by changing position of scattering foil in the head of linear accelerator. The effect of electron scattering foil on energy spectra which is basic data of simulation for medical linear accelerator were presented. The calculated results would be used in design of medical accelerator head.
Moxifloxacin의 Secretory PLA2억제가 올레인 산으로 유도된 호중구성 급성 폐손상에 미치는 영향
김병용 ( Byung Yong Kim ),이영만 ( Young Man Lee ) 대한결핵 및 호흡기학회 2010 Tuberculosis and Respiratory Diseases Vol.68 No.6
Background: Based on the known immunoregulatory functions of moxifloxacin on phagocytes, the therapeutic effect of moxifloxacin on oleic acid (OA)-induced acute lung injury (ALI) was investigated. Methods: Moxifloxacin (10 mg/kg) was given to male Sprague-Dawley rats that had been given oleic acid (OA, 30 μL) intravenously. Five hours after OA injection, parameters demonstrating ALI were assessed to measure the effects of moxifloxacin on acute lung injury. Results: The pathological findings of OA-induced ALI`s was diminished by moxifloxacin. Through ultrastructural and CeCl3 EM histochemistry, moxifloxacin was confirmed to be effective in decreasing oxidative stress in the lung as well. Indices of ALI, such as lung weight/body weight ratio, protein content in bronchoalveolar lavage fluid, and lung myeloperoxidase were decreased by moxifloxacin. In diaminobenzidine immunohistochemistry, fluorescent immunohistochemistry, and Western blotting of the lung, moxifloxacin had decreased the enhanced expression of secretory phospholipase A2 (sPLA2) by OA. Conclusion: We concluded that moxifloxacin was effective in lessening acute inflammatory pulmonary edema caused by OA, by inhibiting the neutrophilic respiratory burst, which was initiated by the activation of sPLA2.
두부콩들의 물성학적 기능성 비교 및 최적화에 관한 연구
윤원병,김병용,함영태 ( Won B . Yoon,Byung Y . Kim,Young T . Hahm ) 한국응용생명화학회 1997 Applied Biological Chemistry (Appl Biol Chem) Vol.40 No.3
Optimization theory was applied to a native and two imported soybeans. Failure stress and stress relaxation curve was measured with rheometer, and color was measured by colorimeter. The effects of each soybean upon the tofu texture were expressed through a non-linear canonical regression model and trace plot. Compared to the other imported soybeans, native soybean produced a higher strength in tofu texture, and showed the positive increase in viscoelastic properties such as instantaneous stress, equilibrium stress and relaxation time, whereas it had no effect on whiteness from reference blend, represented that native soybean showed the individual strength upon the selected rheological texture properties. Higher soaking ability in native soybean was selected as a new response for the optimization mixture process, and it contributed positively to the rheological properties of tofu. New soaking process control system during processing and desirability for the mathematical model should be applied for a better mixture design in varieties of soybeans.
치료테이블과 콜리메이터가 전립선암 래피드아크 치료계획의 선량분포에 미치는 영향
김형동,김병용,김성진,윤상모,김성규,Kim, Hyung-Dong,Kim, Byung-Young,Kim, Sung-Jin,Yun, Sang-Mo,Kim, Sung-Kyu 한국의학물리학회 2012 의학물리 Vol.23 No.2
치료 테이블 회전, 아크 간 콜리메이터 회전 각도가 광자에너지별 전립선암 래피드아크 치료계획의 선량분포에 미치는 영향에 대해 조사하였다. 6 MV와 10 MV 광자 에너지에 대해 2 아크(two arcs)를 사용하여 아크 간 콜리메이터 각도 차이가 $0^{\circ}$, $15^{\circ}$, $30^{\circ}$, $45^{\circ}$, $60^{\circ}$, $75^{\circ}$, $90^{\circ}$인 경우와 치료 테이블 회전 유무에 따라 치료계획을 시행하였다. 선량 최적화를 위한 표적 및 중요 장기의 선량 제한치(dose constraints)를 동일하게 적용하여 계산하였고 선량 분포를 평가하기 위해 CI (Conformity index), HI (Homogeneity index), QOC (Quality of Coverage) 등의 정량화된 선량 지표를 구하여 각 치료계획의 최적화 결과를 비교하였다. 그 결과 치료계획표적용적과 중요장기의 선량 지표 차이는 3.6% 이하로 광자에너지, 치료테이블, 아크 간 콜리메이터 각도의 영향은 크지 않았다. 그러나 표적에서 먼 정상조직의 경우 저 선량 영역 차이가 크게 나타났다. 좌우 대퇴골두의 V15%는 6 MV 일 때 각각 6.4%, 5.5% 높았고, 치료테이블 회전 시에는 23.4%, 24.1% 높게 나타났다. 표적에서 먼 영역(Far Region)의 V10%는 6 MV 일 때 54.2 cc, 치료테이블 회전이 없을 때 343.4 cc, 아크 간 콜리메이터 각도가 $0^{\circ}$일 때 457.8 cc 크게 나타났다. We investigated the influence of photon energy, couch and collimator angle differences between arcs on dose distribution of RapidArc treatment planning for prostate cancer. RapidArc plans were created for 6 MV and 10 MV photons using 2 arcs coplanar and noncoplanar fields. The collimator angle differences between two arcs were $0^{\circ}$, $15^{\circ}$, $30^{\circ}$, $45^{\circ}$, $60^{\circ}$, $75^{\circ}$ and $90^{\circ}$. The plans were optimized using same dose constrains for target and OAR (organ at risk). To evaluate the dose distribution, plans were analyzed using CI (conformity index), HI (homogeneity index), QOC (quality of coverage), etc. Photon energy, couch and collimator angle differences between arcs had a little influence on the target and OAR. The difference of dosimetric indices was less than 3.6% in the target and OAR. However, there was significant increase in the region exposed to low dose. The increase of V15% in the femur was 6.4% (left) and 5.5% (right) for the 6 MV treatment plan and 23.4% (left), 24.1% (right) for the noncoplanar plan. The increase of V10% in the Far Region distant from target was 54.2 cc for the 6 MV photon energy, 343.4 cc for the noncoplanar and 457.8 cc for the no collimator rotation between arcs.
최병호(Byung-Ho Choi),허진영(Jin-Young Huh),박동균(Dong-Joon Park),김병용(Byoung-Yong Kim),이승호(Seoung-Ho Robert Lee),박선영(Sun-Young Park) 대한구강악안면외과학회 2003 대한구강악안면외과학회지 Vol.29 No.1
In this study, we showed that neurons could be generated from adult canine bone marrow stem cells by culturing with DMSO/BHA/FeCl2. These neurons differentiated from the bone marrow stem cells formed neurites, expressed neuron-specific markers. This differentiation was enhanced by FeCl2. These results suggest that iron can effectively initiate differentiation of adult bone marrow stem cells into neurons.
상악동거상술시 발생된 상악동점막 천공의 폐쇄를 위한 Cyanoacrylate 접착제
최병호(Byung-Ho Choi),주석강(Shi-Jiang Zhu),김병용(Byung-Young Kim),허진영(Jin-Young Huh),이승호(Seoung-Ho Lee),정재형(Jae-Hyung Jung) 대한구강악안면외과학회 2004 대한구강악안면외과학회지 Vol.30 No.6
Aim: To assess the efficacy of cyanoacrylate adhesive in the management of large perforations of the maxillary sinus membrane during sinus lifts. Material and methods: Eight rabbits were used in the study. Sinus membrane perforation(about 1.5cm) was repaired with cyanoacrylate adnesive on one side of the maxillary sinus and the opppsite side was used as a control. Histological evaluation was performed 4 weeks after the operation. Results: Histological studies showed normal healing of the sinus membrane across the site of previous perforation and no evidence of inflammation. Conclusion: Our results support the clinical use of cynoacrylate adhesive for repairing sinus membrane perforation.
반영주 ( Young Ju Ban ),백무열 ( Moo Yeol Baik ),함영태 ( Young Tae Hahm ),김혜경 ( Hye Kyung Kim ),김병용 ( Byung Yong Kim ) 한국산업식품공학회 2010 산업 식품공학 Vol.14 No.2
Black ginger, obtained from steaming and drying process, provides the various functional properties. This study was performed to investigate the optimum processing conditions for black ginger with high content of biologically active substance such as anti-oxidations. Optimum processing conditions such as temperature and time for black ginger was determined by response surface methodology (RSM) with manufacturing process and functionality. The optimum steaming condition was determined 6 hours at 93.2oC, and 82.7mg/L DPPH scavenging activities was obtained at this condition. The black ginger drink was made with black ginger extracts, Japanese apricot, and honey. Interaction effects of these ingredients were investigated by modified distance based on design and analyzed by linear, nonlinear regression model, and RSM. The optimization of mixture ratio was made by statistical modeling using DPPH scavenging activities and sensory properties which are the important target constraints in drink. Total flavonoids showed a linear canonical form, while preference and antiradical activity showed a nonlinear canonical form indicating the higher interaction among mixtures. The response trace plot revealed that antiradical activity, sensory properties and total flavonoids were quite sensitive to the drink blending. The optimum formulation of the drink was set at 14.2% of black ginger extracts, 5% of Japanese apricot, and 10.8% honey.
최병호(Byung-Ho Choi),박동준(Dong-Joon Park),주석강(Shi-Jiang Zhu),허진영(Jin-Young Huh),김병용(Byung-Young Kim),이승호(Seoung-Ho Lee) 대한구강악안면외과학회 2003 대한구강악안면외과학회지 Vol.29 No.6
Aim: Several injectable materials have been used in the application of osteogenic bone substitute; however, nothing has won universal acceptance. This study was performed to investigate whether chitosan-alginate gel/MSCs/BMP-2 composites are potentially injectable materials for new bone formation. Material and Methods: The composites were injected into the subcutaneous space on the dorsum of the nude mouse to investigate whether new bone would be tissue engineered in the mouse. The composites were examined histologically over a 12-week period. Results: The composites implanted in the mouse were able to tissue engineer new bone, and the newly formed bone consisted of trabecular bone and calcified bone matrix. Conclusions: The present study shows that chitosan-alginate gel/MSCs/BMP-2 composites have the potential to become real injectable materials for new bone formation.