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고지방 식이 유발 비만에서 베타원 추출물이 지방세포 분화 억제에 미치는 영향
이용진,신한별,이미자,이미경,손영진,Lee, Yongjin,Shin, Han-Byeol,Lee, Mi-Ja,Lee, Mi-Kyung,Son, Young-Jin 한국생약학회 2022 생약학회지 Vol.53 No.3
Obesity is a disease in which an abnormally large amount of fat accumulates in the body. Various diseases such as type 2 diabetes, dyslipidemia, high blood pressure, fatty liver, gallbladder disease, and coronary artery disease are induced. In this study, we investigated the effect of betaone, a type of barley, on obesity suppression. After the betaone extract was treated with 3T3 L1 adipocytes, the effect on adipocyte formation was investigated through Oil Red O staining. It was observed that differentiation was inhibited without affecting the viability of 3T3 L1 adipocytes. The effect of betaone extract on obesity inhibition in a mouse model was investigated. As a result of administering betaone extract after a high-fat diet, it was confirmed that the level of blood sugar and body weight was decreased, and glucose uptake ability was improved in a glucose tolerance test. The formation of mouse adipose tissue was suppressed, and the expression of genes involved in the formation and degradation of obesity in liver tissue was improved. These results suggest that betaone extract is a useful substance for improving obesity and is an excellent material for health functional food.
수계 종속영양세균의 소장에 미치는 Azo 계 염료의 영향 및 염료 분해미생물의 분리
이용진,조홍범,최영길,이호용 ( Yong Jin Lee,Hong Bum Cho,Yong Keel Choi,Ho Yong Lee ) 한국하천호수학회 1993 생태와 환경 Vol.26 No.2
Effects of Orange II, a kind of azo dye, on heterotrophic bacterial population in Han river were not significantly toxic. Survival rate of the heterotrophic bacteria in each site was shown 22.85-51.31% at 5000 mg/l of Orange II. LD_50 of Orange II are 1000 mg/l or more in each site. Heterotrophic bacteria capable of degrading Orange II as a sole carbon source were not isolated in Han river but isoated Torulopsis sp., a kind of yeast, in wastewater of textile industry. The degradation rate of this isolate was over 90% after 66 hours culture in PAS medium containing 10 mg/l of Orange II and 2% of glucose. Its optimum temperature and pH are 37˚C, pH 7, respectively.
이용진,강정운,배상운,윤연석,노병철,Lee, Yong-Jin,Kang, Jeong-Woon,Bae, Sang-Woon,Yun, Yeon-Suk,Lho, Byeong-Cheol 한국건설순환자원학회 2013 한국건설순환자원학회 논문집 Vol.1 No.2
밤콩 사장교는 메콩강 삼각주 지역 연결 사업의 일환으로 메콩강 하류의 꾸롱 삼각주에 위치하고 있으며, 중앙경간 450m의 사장교로 설계되었다. 왕복 4차선으로 구성된 강합성 보강형과 멀티 스트랜드 방식의 케이블을 적용하였으며, 개선된 H형 주탑과 현장타설 콘크리트 말뚝 기초로 구성되어 있다. 주탑, 프리캐스트 콘크리트 바닥판 그리고 현장타설 콘크리트 말뚝에는 고강도 콘크리트를 적용하여 구조적 안정성을 확보하였다. 본 고에서는 밤콩 사장교의 설계에 적용된 설계기준 및 주요 설계 특징을 설명하고자 한다. Vam Cong Cable Stayed Bridge which has 450m main span length is one of the Central Mekong Delta Region Connectivity Project and is located in Cuu Long Delta Region. It has steel-concrete composite girder with 4 lane and the type of cable is multi strand cable. The improved H-shape pylon and cast-in-place bored piles were applied. High strength concrete is applied for pylon, precast concrete slab and Cast-in-Situ concrete pile to ensure the structural safety. The present paper describe the design specifications and main features of Vam Cong Cable Stayed Bridge design.
자동차용 마찰재에 함유된 세라믹분말의 함량에 따른 마찰특성
이용진,류재경,김택남,Lee, Yong-Jin,Ryu, Jae-Kyung,Kim, Taik-Nam 한국재료학회 2009 한국재료학회지 Vol.19 No.7
The friction characteristics of automotive brake friction materials that contained different ceramic content were investigated. Several kinds of raw materials, such as resin-based binder, reinforcing fiber, friction restraint, abrasive, and filling materials were mixed, pressed, and heated in order to make the brake friction materials. The contents of SiC and $BaSO_4$ changed from 5 vol% to 20 vol%, respectively. In addition to this, the content of $Al_2O_3$ adjusted from 1 vol% to 16 vol%. The surface morphology of the SiC containing sample appeared rough while more debris was observed when the contents of SiC increased. This implies that the SiC containing brake composite was not adequate for the automobile. However, the relatively smooth surface was observed in samples that contained the $Al_2O_3$. But the roughness was low with a content of 11 vol% $Al_2O_3$ compared to the other samples. This is consistent with the abrasive properties of the samples. In the case of $BaSO_4$ containing samples, the smoothes surface was observed in the contents of 15 vol% $BaSO_4$. Thus, it was concluded that the 11 vol% $Al_2O_3$ and 15 vol% $BaSO_4$ containing composite would be the optimum content for the brake composite. Similar to the results of the surface morphology, the abrasion resistance consistently decreased when the content of SiC increased. On the contrary, the sample that contained 11 vol% $Al_2O_3$ and 15 vol% $BaSO_4$ showed the highest abrasion resistance compared to the other samples.
이용진,Lee, Yong-Jin 한국사물인터넷학회 2016 한국사물인터넷학회 논문지 Vol.2 No.3
본 논문은 기술교육 및 공학교육에서 정보통신기술을 가르칠 때 적용 가능한 피지컬 컴퓨팅 학습모델을 제안한다. 이 모델은 피지컬 컴퓨팅에 기반을 두고 정보의 생성과 정보의 전송을 하나의 프레임 안에서 다루는 것으로 학생들에게 정보와 통신에 대한 종합적인 이해와 실습을 제공한다. 본 연구에서 제안한 학습모델은 클라이언트-서버 구조에 기반을 둔 학습모델과 웹에 기반을 둔 학습모델로 나누어진다. 실제 구현된 학습모델에서 정보의 획득과 제어는 아두이노의 스케치를 통해 이루어지며 정보의 통신은 최근 교육용 플랫폼으로 잘 알려진 라즈베리파이의 파이썬소켓을 이용하여 수행된다. 제안한 학습 모델은 학생들에게 전 세계적인 정보 제어와 통신을 가능하게 해주는 사물 인터넷의 개념을 가르치는 데 사용될 수 있다. This paper aims to present the physical computing learning model applicable in teaching the information and communication technology for technology and engineering education. This model is based on the physical computing and deals with the information creation and information transfer in one framework, thus provides students with the total understanding and practice opportunity about information and communication. The proposed learning models are classified into the client-server based model and the web based model. In the implemented learning model, the acquirement and control of information is performed by sketch on Arduino and the communication of information is performed by the Python socket on Raspberry Pi well known as an education platform. Our proposed learning model can be used for teaching students to understand the concept of Internet of Things (IoT), which provides us with world wide control and communication of information.
Two Local States of Ambient Water
이용진,Young Kyu Lee,SeongMin Jeong,Anupam Kumar,조용석 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.76 No.1
The non-monotonic trends of thermodynamic response functions have long been a mystery of water. The idea, that water may be a mixture of two local states, came out more than a century ago to explain the origin of the non-monotonic behaviors. Recently, this idea is materialized through the hypothesis of the second critical point of water and then the anomalies are outcomes of critical fluctuation. Although the typical macroscopic heterogeneity (Widom line) of critical fluctuation stays in the vicinity of the critical point, as we have previously shown that the microscopic heterogeneity is identified far from it which extends the linear heterogeneity, the Widom line, to the areal one as a Widom Delta. With this background, we search for two local states of the ambient water. Distinct states in ambient condition are not to be contrasted by a single strong feature such as density but they are expressed by a combination of weak features that reflects locally correlated structures. In this work, we identify the formation of local bicontinuous micro-domain formations of water attributing its softness by using machine learning order parameters. Interestingly, the radial distribution functions are similar to two phases in the liquid-liquid phase transition and they are well fitted by the two-state model. The hard-label domain is dominant at a lower temperature but changes its label to a more fluctuating soft-label domain at high temperature. There exist crossover behaviors around 310-320 K. At sufficiently high temperatures, near the liquid-gas phase transition, all water molecules become homogeneous.