Lactobacillus brevis로 발효한 산수유(Cornus officinalis)의 항산화 활성 및 유지 산화 안정성

김동선,강순아 한국식품영양학회 2026 한국식품영양학회지 Vol.39 No.4

In this study, we evaluated the antioxidant activity and lipid oxidative stability of Cornus officinalis powder fermented with Lactobacillus brevis. The powder was inoculated with 100 mL (COF1) or 50 mL (COF2) of L. brevis culture and incubated statically at 30℃ for 48 h; the control (CO) received sterile distilled water. In vitro, the DPPH and ABTS radical scavenging activity and total polyphenol content were the highest in COF2 (p<0.05); TPC increased by approximately 11% over CO, whereas the total flavonoid content showed no significant difference. For lipid stability, fermented extracts were added to soybean oil (200 and 1,000 ppm) and oxidized at 180℃. Suppression of the primary product (CDA) was greatest in the CO, whereas that of the secondary product (p-AV) was most effective in the COF2 (14.4% reduction); however, TBA values increased at 1,000 ppm, likely due to color interference and the pro-oxidant action of polyphenols. The fermented groups in the oil-in-water emulsions oxidized at 60℃ suppressed headspace oxygen consumption and conjugated diene formation more than that in the CO. These results indicate that L. brevis fermentation enhances the antioxidant properties of Cornus officinalis, with inhibitory patterns differing according to the oxidation stage, supporting its potential as a natural antioxidant for oil-processed foods.

안면도 주변 바다목장 해역의 해수수송량 산정

김동선,배상완,이재봉,정다운 해양환경안전학회 2011 해양환경안전학회 학술발표대회 논문집 Vol.2011 No.06

해수의 수송이 바다목장화 해역에 미치는 영향을 알아보기 위하여 조석과 바람, 수온 및 염분의 효과를 고려한 해수 유동 모델을 관측한 자료를 토대로 하여 구축하였다. 현장 관측 결과 중층에서 유속이 가장 강하게 나타났으며, 조화분해 결과 반일주조가 강한 혼합조의 형 태로 나타났다. 조류 효과만을 고려하였을 경우, 해수는 어류목장에서 갑각류목장으로, 갑각류목장에서 패류목장으로 수송되었다. 조석과 바람, 수온 및 염분의 효과를 고려한 잔차류의 경우에는 어류목장에서 갑각류목장으로, 패류목장에서 갑각류목장으로 해수가 수송되었다. 한편, 해수 의 최대 수송은 조류나 잔차류의 2가지의 경우 모두가 동일하게 어류목장에서 갑각류목장으로 이동할 때 나타났다.

소형 흡착식 제습기의 모델 개발

김동선,Kim, Dong-Seon 한국교통대학교 융복합기술연구소 2012 융ㆍ복합기술연구소 논문집 Vol.2 No.2

A small domestic desiccant dehumidifier is modelled using effectiveness models for a desiccant wheel and a wet-air condenser. The desiccant wheel and condenser models are used to compose a system model in the form of a set of simultaneous linear algebraic equations, which is solved by Gauss method. The system model is used to simulate the behaviour of a dehumidifier with a 1kW electric air heater. It is found that the maximu COP is about 0.5 and dehumidification capacity is 18kg/day when the ratio of dehumidification area is 0.7. The optimum wheel thickness and face velocity are found 100mm and 1.5m/s, respectively.

광학적 방법을 이용한 슬러그 유동의 기공률 측정

김동선,Kim, Dong-Seon 한국교통대학교 융복합기술연구소 2011 융ㆍ복합기술연구소 논문집 Vol.1 No.2

Void fraction has been measured for the gas-liquid cocurrent slug flow in 8mm vertical acrylic tube using an optical method. Bubble speed, length and period could be measured with the two sets of laser-infrared sensor modules mounted 25mm apart alongside the tube, which were designed to detect variation of light intensities with a time delay when two parallel laser beams were refracted successively by a passing bubble. It was found that the results were in good agreement with the previous studies in the literature suggesting that the method used in this study were sound and accurate.

생체장기용 지지체 제작을 위한 박동형 탈세포화 장치의 박동성 평가

김동선,양세란,박성민,최성욱,Kim, Dong Sun,Yang, Se-Ran,Park, Sung Min,Choi, Seong Wook 대한의용생체공학회 2017 의공학회지 Vol.38 No.2

To identify a solution for the restricted availability of healthy lungs and the high risk of immune rejections following organ transplantation, tissue engineering techniques for culturing lungs have been studied by many research groups. The most promising method for culturing lungs is the utilization of a bio-scaffold that was prepared using harvested organs from human donors or other animals by removing their original cells. In this study, a pulsatile perfusion pump was used to alleviate the cell removal effect with the high fluid-dynamic power of the perfusion stream during the decellularization process, while other conventional studies focused on chemical methods to identify efficient detergents. The purpose of this study was to analyze the developed device by using energy equivalent pressure (EEP), which is an indicator of pulsatility, to understand the characteristics of pulsatile energy transmitted according to the load size by using the artificial model and compare it with the measured EEP. The pulsatility of the device can be estimated with the concept of fluid-dynamic energy during a particular constant time period or fluid-dynamic power represented as EEP and EEP increment. Because the measured EEP of perfusion flow during decellularization can be changed by the amount of fluid leakage and the degree of clogging in the capillary vessels, EEP should be measured to determine whether the decellularization is progressing without problems. The decrement of EEP caused by the high perfusion resistance was observed from some experimental results that were obtained with artificial models. EEP can be used to monitor the decellularization process after analyzing the varying EEP according to the amount of load. It was confirmed that the EEP was maintained at a high level in the experiment using the harvested lungs from 12-13-week-old rats. In addition, it was confirmed that the cell removal time was faster than when continuous perfusion was performed. In this study, pulsatile power delivered to the lungs was measured to monitor the process of cell removal, and it serve as the evidence for efficient decellularization.

사람중심 치매커뮤니케이션에 대한 근거 이론적 연구

김동선,김수경 한국콘텐츠학회 2022 한국콘텐츠학회논문지 Vol.22 No.5

Communication breakdown has been mentioned causing a heavy burden for dementia caregivers. This study aims to inspect and structure the process and results of communication between people with dementia and their caregivers. The impeding/facilitating elements of communication are also extracted. Interviews with 21 of dementia care experts about the direct and indirect experiences of communication with people with dementia were analyzed based on the grounded theory. Results show that combination of the cognitive and communication decline of the people with dementia, confusing environment and caregivers’ inappropriate attitude and lack of communication skills leads to communication breakdown and relations severance. Minimal contacts and task-oriented conversation results in conflicts and people with dementia’s increasing agitation, anxiety and violent behaviors while understanding of individuality and listening with heart lead to recovered lucidity in the state of serious dementia, recovered pleasure and voluntary participation in the daily activities for people with dementia. Core paradigm was defined as ‘Person Centered Care through relation formation’. There are 4 types of communication with people with dementia : partnering, patronizing, conflicting, avoiding types. Researchers suggest that Person Centered based communication skills be educated and trained for dementia caregivers. 커뮤니케이션 장애는 치매 돌봄 부담의 주된 원인으로 지적되고 있다. 본 연구는 케어자와 치매노인 간의 커뮤니케이션 과정 및 결과를 구조화하여 커뮤니케이션의 촉진요인을 찾는 것을 목적으로 한다. 시설의 치매케어자 21명을 대상으로 커뮤니케이션 직·간접 경험을 인터뷰해, 수집된 자료를 근거이론에 따라 분석하였다. 연구 결과, 치매인과의 커뮤니케이션 과정은 치매인의 인지·언어기능 저하가 원인으로 작용하지만, 소란스러운 환경이나 커뮤니케이션 기술 부족 등이 맥락적 조건으로 작용하여 커뮤니케이션 실패 현상이 이루어진다. 이때, 최소한의 접촉, 업무중심의 대화로 대응하는 경우, 갈등과 회피로 나아가는 부정적 커뮤니케이션이 이루어지는 반면, ‘개인에 대한 이해’, ‘경청’, ‘마음으로 이해’ 등의 중재를 통해 긍정적 커뮤니케이션이 가능하다는 것을 확인했다. 중재적 조건에 따라 치매노인의 배회, 폭력적 행동이 악화되기도 하지만 반대로 치매인의 인지 능력이 개선되거나 즐거움 회복, 일상생활에의 참여 등 긍정적 결과가 나타났다. 본 연구에서의 핵심범주는 ‘관계 맺음을 통한 사람중심케어’이며 범주유형은 갈등형, 무시형, 보호형, 파트너형으로 나뉘어진다. 본 연구 결과를 토대로 사람중심케어에 입각한 치매 커뮤니케이션 교육 및 훈련을 제언한다

Sea-air CO2 Flux in the South Yellow Sea Based on Seasonal Underway Observations

김동선,조소설,최동한 한국해양과학기술원 2024 Ocean science journal Vol.59 No.4

To estimate annual sea–air CO2 flux in the southern Yellow Sea (SYS), surface CO2 partial pressure (pCO2) was determined using high-resolution underway observations across four seasons. Surface CO2 exhibited large seasonal variation in the SYS, with high values in summer and low values in spring. Surface pCO2 had no clear relationship with sea surface temperature (SST) or sea surface salinity (SSS) on the seasonal timescale. Apart from the thermal effect, the main processes affecting surface pCO2 varied among seasons, i.e., photosynthetic carbon fixation from winter to spring, sea–air CO2 exchange from spring to summer, vertical mixing and sea–air CO2 exchange from summer to autumn, and vertical mixing and sea–air CO2 exchange from autumn to winter. In spring, sea–air CO2 flux ranged from − 77.3 to − 0.05 mmol m−2 day−1, with an average of − 18.9 ± 5.3 mmol m−2 day−1. In summer, sea–air CO2 flux ranged from 0.01 to 30.4 mmol m−2 day−1, with an average of 3.8 ± 1.6 mmol m−2 day−1. In autumn, sea–air CO2 flux ranged from − 16.1 to − 0.03 mmol m−2 day−1, with an average of − 2.9 ± 1.7 mmol m−2 day−1. In winter, sea–air CO2 flux ranged from − 36.7 to 10.9 mmol m−2 day−1, with an average of − 4.5 ± 2.2 mmol m−2 day−1. Annual sea–air CO2 flux in the SYS was calculated as − 5.6 ± 1.8 mmol m−2 day−1, suggesting that the SYS absorbs atmospheric CO2 at an annual rate of 2.1 ± 0.6 mol m−2 yr−1.

“중소기업의 정보기술융합 활성화를 위한 마중물이 되어주길”

김동선 중소기업융합학회 2011 융합정보논문지 Vol.1 No.1

UPOV 제도 하의 유전자분석 활용

김동선 한국종자연구회 2024 종자과학과 산업 Vol.20 No.4

품종 개발에 분자마커가 유용하게 사용되면서 유전자분석을 통해 품종을 식별하기 위한 노력과 연구가 지속되어 지고 있다. UPOV 협약 안에서 품종보호제도를 운영하고 있는 우리나라를 비롯해 대부분의 UPOV 회원국들이 분 자마커를 신품종 심사에 활용하여 객관성 확보, 신뢰도 제고, 효율성 향상, 심사기간 단축 등에 노력하고 있다. 그러 나, 분자마커만으로 신품종 여부를 확정하는 단계에 이르지 못하고 있는 것이 현실이다. 따라서, UPOV 에서는 DUS 심사에서 분자마커를 활용할 수 있는 방식을 2가지로 지침화하여 제공하고 있다. 첫째는 형질 특이적 분자마 커를 활용하는 것이고, 둘째는 표현형과 유전형을 통합하여 품종을 관리하는 것이다. 또한, 두 번째 방식은 표현형과 유전형으로 공시품종을 관리하는 것과 유전자분석을 통해 유사품종을 찾아서 재배시험에 포함하는 것으로 나눠질 수 있다. 즉, 세부적으로는 3가지 방식을 제공하고 있는 것이다. UPOV는 이러한 지침을 제공함과 동시에 매년 TWM 회의를 개최하여 회원국들의 분자마커 활용 사례를 공유하고 이를 지침에 반영하거나 회원국간 공동 연구를 통해 유의미한 결과를 도출하는 등의 다양한 역할을 수행하고 있다. 이번 발표에서는 유전자분석과 관련된 UPOV의 다양한 활동과 함께 UPOV에서 제공하는 3가지 방식에 대한 세부내용 및 우리나라의 활용예를 제공하여 종자연구회 회원들의 이해를 돕고자 한다.

The changes in marine environment and biological community in sea areas around an artificial upwelling structure during the summer

김동선,김무찬 한국통합생물학회 2013 Animal cells and systems Vol.17 No.5

In order to examine the changes in a biological community in the South Sea of Korea that is caused by the installation of an artificial upwelling structure during the summer season when the forming of the stratification is the strongest, the researchers evaluate the water’s temperature and nutrients, the standing crops and species diversity of phytoplankton and zooplankton, and the benthic organisms. The forming depth of Maximum Thermocline of Water Column (MTWC) is elevated after installing an artificial upwelling structure. Also, instead of showing a clear stratification where the concentration of nutrients increases as the depth of the sea increases, the distribution of nutrients after installing an artificial upwelling structure has changed, showing a lower degree of stratification by causing the mixing of the water mass. Compared to 2005, when the artificial upwelling structure was first introduced, the standing crop of phytoplankton and zooplankton has increased by 58.2 and 30.0 times in 2008, thus showing a tendency to increase as the size of the artificial upwelling structure becomes bigger. Also, the species diversity index of phytoplankton and zooplankton has increased and the size of the artificial upwelling structure has become greater. When the environment underwater around the artificial upwelling structure was examined in 2008, the underwater environment, arthropods such as Balanus albicostatus, mollusks such as Patinopecten yessoensis and Batillus cornutus, echinoderms such as Asterina pectinifera and Comanthus japonica, chordates such as Halocynthia roretzi, and fishes such as Sebastes inermis and Oplegnathus fasciatus were found, thus forming a benthic environment.