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열수가압탄화(Hydrothermal Carbonization, HTC) 반응을 이용한 폐목재 고형연료 가능성에 관한 연구
원민희 ( Minhee Won ),이재영 ( Jai-young Lee ) 한국폐기물자원순환학회 2021 한국폐기물자원순환학회지 Vol.38 No.6
As an alternative to a new and renewable energy source, bio-coal is generated through hydrothermal carbonization (HTC) which is a novel renewable energy production technology using waste. Therefore, bio-coal was generated through HTC reaction using wood waste, which is the most used biomass raw material and requires a recycling method and confirmed its possibility as a solid fuel. It can be seen that the higher the reaction temperature and the longer the reaction time, the higher is the fixed carbon content, which affects the heating value. At 300℃ and 4 h, the lowest heating value was 6841.23 Kcal/kg. In addition, the fuel ratio at 300℃ was 1.3 ~ 1.6, which indicates a higher fuel ratio range than that of low-grade coal, and it can be seen from the van krevelen diagram that the biomass region is closer to the lignite region.
Identification of specifically activated angiogenic molecules in HMGB-1-induced angiogenesis
( Won Kyu Kim ),( Yujin Kwon ),( Minhee Park ),( Seongju Yun ),( Ja-young Kwon ),( Hoguen Kim ) 생화학분자생물학회 2017 BMB Reports Vol.50 No.11
High-mobility group box-1 (HMGB-1) is expressed in almost all cells, and its dysregulated expression correlates with inflammatory diseases, ischemia, and cancer. Some of these conditions accompany HMGB-1-mediated abnormal angiogenesis. Thus far, the mechanism of HMGB-1-induced angiogenesis remains largely unknown. In this study, we performed time-dependent DNA microarray analysis of endothelial cells (ECs) after HMGB-1 or VEGF treatment. The pathway analysis of each gene set upregulated by HMGB-1 or VEGF showed that most HMGB-1-induced angiogenic pathways were also activated by VEGF, although the activation time and gene sets belonging to the pathways differed. In addition, HMGB-1 upregulated some VEGFR signaling-related angiogenic factors including EGR1 and, importantly, novel angiogenic factors, such as ABL2, CEACAM1, KIT, and VIPR1, which are reported to independently promote angiogenesis under physiological and pathological conditions. Our findings suggest that HMGB-1 independently induces angiogenesis by activating HMGB-1-specific angiogenic factors and also functions as an accelerator for VEGF-mediated conventional angiogenesis. [BMB Reports 2017; 50(11): 590-595]
워터드라이브 내부 유동 특성 파악을 위한 수치해석 연구
곽민희(Minhee Kwak),허남건(NahmKeon Hur),장춘수(Choon-Soo Chang),강남원(Nam-Won Kang) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
Water drive is one of the hydraulic coupling used for torque transmitting. This paper performs numerical analysis to investigate flow characteristics in water drive with different operating condition. Rotating speed of the primary wheel is fixed but that of the secondary wheel is changed. Also water volume fraction are changed. The realizable k-ε turbulence model and VOF method are used to simulate air-water two-phase flow inside the water drive. The simulation are conducted using the sliding grid. The results are presented in the form of flow patterns, torque values and circulation mass flow rate between the primary wheel and secondary wheel.
상수원 관망 부식 제어를 위한 부식성 수질 관리: 북미지역 관리 사례 및 국외 현황
김민희 ( Minhee Kim ),현승훈 ( Seunghun Hyun ),이원석 ( Won-seok Lee ),( Loretta Y. Li ) 한국물환경학회 2017 한국물환경학회지 Vol.33 No.3
Water distribution systems supply drinking-water to consumers` taps. Internal corrosion of metallic pipe used in drinking-water distribution systems has reduced water quality by increasing its levels of toxic heavy metals, such as lead, copper, and nickel. These problems have been experienced to varying degrees by water utilities in many countries. North America has successfully controlled pipe corrosion and polluted water in water distribution systems by means of various policies, regulations, and rules. Practical and engineering guidelines for evaluating pipe corrosion and deciding on treatment options are also provided to improve drinking-water supplies. In addition, research on the corrosion mechanism in water distribution systems, such as the complex effects of physical and chemical parameters on the corrosion of pipes, has been used to more accurately predict the corrosion rates of metallic pipes in actual water distribution systems. This paper reviews various regulations, policy statement, and treatment procedures concerned with controlling corrosion in drinking-water distribution systems in the US and Canada and offers suggestions for management of polluted water and pipe corrosion in drinking-water distribution system in Korea.
새로운 식품원료로 등록된 식용곤충의 영양성분 비교 분석
백민희(Minhee Baek),황재삼(Jae-Sam Hwang),김미애(Mi Ae Kim),김수희(Soo-Hee Kim),구태원(Tae-Won Goo),윤은영(Eun-Young Yun) 한국생명과학회 2017 생명과학회지 Vol.27 No.3
본 연구에서는 갈색거저리, 흰점박이꽃무지 및 장수풍뎅이 유충의 영양성분을 비교분석하였고, 이를 통해 식용곤충 이용 시 곤충 선택 기준확립에 기초 자료로 활용될 수 있을 것으로 사료된다. 3종 식용곤충의 영양성분 비교결과, 조단백질, 조지방, 탄수화물은 각각 흰점박이꽃무지, 갈색거저리 및 장수풍뎅이 유충에서 가장 높았다. 아미노산 함량 비교 분석 결과, 총 아미노산 함량과 필수 아미노산의 함량은 갈색거저리 유충에서 가장 높았다. 지방산의 조성은 갈색거저리와 흰점박이꽃무지 유충이 유사하였으며, 이들은 장수풍뎅이 유충에 비해 불포화 지방산 함량이 높았다. 또한, 무기질 함량의 비교 분석 결과, 칼슘과 철은 장수풍뎅이 유충에서 가장 높은 반면 인과 칼륨은 흰점박이꽃무지 유충에 가장 많이 함유되어 있었다. 위와 같은 결과를 통해 각각의 곤충이 함유하는 영양성분에 따라 노인, 어린이 및 임산부 등 다양한 영양 요구를 가지는 대상에 따라 필요한 곤충을 선택하여 섭취가 가능할 것이며 식용곤충을 다양하게 조합하는 경우 보다 풍부한 영양분을 섭취할 수 있을 것으로 사료된다. In this study, the nutritional components of Tenebrio molitor, Protaetia brevitarsis, and Allomyrina dichotoma larvae, which have been registered as novel foods, were analyzed and compared to expand the diversity of selection criteria for edible insects. The contents of crude components, amino acids, fatty acids, and minerals were analyzed. According to the results of comparative analysis of edible insects, crude proteins were abundant in all three kinds of insects. The content of crude fat was the highest in T. molitor, and the content of carbohydrate was the highest in A. dichotoma. When comparing the composition of amino acids, total amino acid content and essential amino acids were the highest in T. molitor larvae. In T. molitor and P. brevitarsis larvae, the compositions of fatty acids were similar, with higher amounts of unsaturated fatty acids than in A. dichotoma. In terms of mineral content, A. dichotoma contained the highest amounts of calcium and iron, whereas P. brevitarsis contained the highest amounts of phosphorus and potassium. With these results, it is expected that edible insects could be selected according to nutritional demand. In addition, multiple combinations of edible insects will offer a richer intake of nutrients.
Jung, Seok-Won,Kim, Hyeon-Joong,Lee, Byung-Hwan,Choi, Sun-Hye,Kim, Hyun-Sook,Choi, Yang-Kyu,Kim, Joon Yong,Kim, Eun-Soo,Hwang, Sung-Hee,Lim, Kwang Yong,Kim, Hyoung-Chun,Jang, Minhee,Park, Seong Kyu,Ch The Korean Society of Ginseng 2015 Journal of Ginseng Research Vol.39 No.3
Background: Anticancer agents induce a variety of adverse effects when administered to cancer patients. Busulfan is a known antileukemia agent. When administered for treatment of leukemia in young patients, busulfan could cause damage to the male reproductive system as one of its adverse effects, resulting in sterility. Methods: We investigated the effects of Korean Red Ginseng extract (KRGE) on busulfan-induced damage and/or dysfunction of the male reproductive system. Results: We found that administration of busulfan to mice: decreased testis weight; caused testicular histological damage; reduced the total number of sperm, sperm motility, serum testosterone concentration; and eventually, litter size. Preadministration of KRGE partially attenuated various busulfan-induced damages to the male reproductive system. These results indicate that KRGE has a protective effect against busulfan-induced damage to the male reproduction system. Conclusion: The present study shows a possibility that KRGE could be applied as a useful agent to prevent or protect the male reproductive system from the adverse side effects induced by administration of anticancer agents such as busulfan.
( E Sun Paik ),( Minhee Shim ),( Hyun Jin Choi ),( Yoo-young Lee ),( Tae-joong Kim ),( Jeong-won Lee ),( Byoung-gie Kim ),( Duk-soo Bae ),( Chel Hun Choi ) 대한산부인과학회 2016 대한산부인과학회 학술대회 Vol.102 No.-
목적: To investigate the impact of pelvic and para-aortic lymphadenectomy during primary debulking surgery (PDS) on recurrence pattern and survival after recurrence in patients with advanced epithelial ovarian cancer (EOC) without suspected lymph node (LN) metastasis in preoperative imaging studies and intraoperative findings. 방법: A retrospective review of patients with FIGO stage III and IV EOC without suspected lymph node metastasis was performed. Patients with stage III EOC due to LN metastasis without peritoneal disease were excluded from this study. Survival comparisons for progression-free survival (PFS), overall survival (OS), and survival after recurrence were performed between patients with or without lymphadenectomy. 결과: Of the 261 EOC patients fulfilling inclusion criteria, 194 (74.3%) experienced relapse and a further 132 (50.6%) died within a median follow-up period of 48 months. Patterns of recurrence were not different between patients with lymphadenectomy and without lymphadenectomy; however, patients with lymphadenectomy showed longer survival after recurrence than those without lymphadenectomy (43 vs. 32 months, p=0.013). This difference was pronounced in the group with residual tumor < 1 cm (48 vs. 30 months, p=0.010). The survival advantage of lymphadenectomy after recurrence remained significant in multivariate analysis (HR 0.57, 95% CI 0.38–0.84, p=0.005). 결론: Lymphadenectomy during PDS was associated with longer survival, especially survival after recurrence. The underlying mechanism should be elucidated in future studies.