거대억새의 연소 반응 특성에 대한 실험적 연구

신명철(Myung Chul Shin),이진기(Jin Ki Lee),임대원(Dae Won Lim),염태희(Tae Hee Yeom) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11

Geodae-Uksae 1 was used to evaluate combustion characteristics. An experiment was performed using a Drop Tube Furnace. To investigate the influence of temperature, reaction was performed at an equivalence ratio of 0.4 and temperatures of 400–1100 C. Kinetic parameters based on combustion characteristics were confirmed that the reaction zone could be divided into three zones by temperature. Evaluation of the reaction kinetic parameters were based on the balance of carbon containing gases CO₂ and CO. The concentration of exhaust gases was measured through the gas analyzer. The activation energy of the Geodae-Uksae 1 is 20.7 kJ/s, which is lower than coal and other biomass. The Geodae-Uksae 1 has a higher combustion reactivity because of its lower activation energy.

Integrative structural annotation of <i>de novo</i> RNA-Seq provides an accurate reference gene set of the enormous genome of the onion ( <i>Allium cepa</i> L.)

Kim, Seungill,Kim, Myung-Shin,Kim, Yong-Min,Yeom, Seon-In,Cheong, Kyeongchae,Kim, Ki-Tae,Jeon, Jongbum,Kim, Sunggil,Kim, Do-Sun,Sohn, Seong-Han,Lee, Yong-Hwan,Choi, Doil Oxford University Press 2015 DNA research Vol.22 No.1

<P>The onion (<I>Allium cepa</I> L.) is one of the most widely cultivated and consumed vegetable crops in the world. Although a considerable amount of onion transcriptome data has been deposited into public databases, the sequences of the protein-coding genes are not accurate enough to be used, owing to non-coding sequences intermixed with the coding sequences. We generated a high-quality, annotated onion transcriptome from <I>de novo</I> sequence assembly and intensive structural annotation using the integrated structural gene annotation pipeline (ISGAP), which identified 54,165 protein-coding genes among 165,179 assembled transcripts totalling 203.0 Mb by eliminating the intron sequences. ISGAP performed reliable annotation, recognizing accurate gene structures based on reference proteins, and <I>ab initio</I> gene models of the assembled transcripts. Integrative functional annotation and gene-based SNP analysis revealed a whole biological repertoire of genes and transcriptomic variation in the onion. The method developed in this study provides a powerful tool for the construction of reference gene sets for organisms based solely on <I>de novo</I> transcriptome data. Furthermore, the reference genes and their variation described here for the onion represent essential tools for molecular breeding and gene cloning in <I>Allium</I> spp.</P>

8주간 수중훈련 프로그램이 고교 축구선수 등속성 근력 및 인스텝 킥의 수행력에 미치는 영향

염준우(Jun Woo Yeom),황성호(Sung Ho Hwang),최명렬(Myong Yol Choi),이성기(Seung Ki Lee),김명기(Myung Gi Kim) 한국사회체육학회 2008 한국사회체육학회지 Vol.0 No.34

The purpose of this study is to show the effects of aquatic training with high school soccer player on in-step shooting speed and accuracy of kick, muscle strength of lower extremities and balance. The subjects of this study were 9 high school-soccer players with a career more than 6 years and they participated in aquatic training for 8 weeks before and after, that the study consist of in-step shooting speed, accuracy of in-step kick, isokinetic strength of ankle and knee joint and balance. We used SPSS 12.0 in order to analyze the results through the research, and compared the measurement subject by using the standard deviation of the mean. In addition, we did paired 2-sample non-parametic test for comparison of variables before and after the experiment and Spearman`s Bivariate Correlation Analysis for relationship of respective variables. The level of significance is set up to 0.05 The results of the study were as follows; 1. In the shooting speed was significantly differentiated pre and post-test(p<.05). 2. In the accuracy of in-step kick was significantly differentiated pre and post-test(p<.05). 3. In the muscle strength of knee flexor and extensor were improvement pre and post but not significantly differentiated. In the muscle strength of ankle dorsiflexor and plantarflexor were significantly differentiated(p<.05). 4. In the one leg standing, muscle strength of the left leg was improvement but not significantly differentiated and the right leg was significantly differentiated(p<.05). 5. Right ankle plantarflexor was significantly differentiated with exercise performance of in-step kick pre and post(p<.05), balance was significantly differentiated with high and mean speed pre and post(p<.05). Therefore, based on the result, it is indicated that the aquatic training had a positive effect on the shooting speed, accuracy of kick, muscle strength of lower extremities and balance. It is considered that give helps to improve ball speed and accuracy.

Design of a Two-Dimensional Proportional Solenoid for Miniature Directional Control Pneumatic Valves

Hong, Yeh-Sun,Ha, Dong-Hyun,Yeom, Myung-Ki The Korean Society of Mechanical Engineers 2003 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.17 No.7

In this paper, a new proportional solenoid invented for pneumatic directional control valves is introduced. The new proportional solenoid has two-dimensional structure and a pivoting armature on which the friction force is inherently negligible. Another advantageous feature of this solenoid is that its mechanical parts can be easily manufactured and assembled. The working principle and design example of the now proportional solenoid, its application to the activation of a 4/3-way directional control valve, and the evaluation of its control performance in a position control loop are reported.

톡소플라즈마 림프절염 1예

이두희,고원기,염준섭,김창오,강웅철,최영화,정소영,송영구,한지숙,김준명 대한감염학회 1998 감염 Vol.30 No.5

톡소플라즈마 림프절염은 외국의 경우 비교적 흔하여 경부 림프절 종대와 양성 비후의 소견을 톡소플라즈마에 의한 경우가 많다. 국내에서는 항체양성율이 외국에 비해 낮아 실제 증례도 그리 많지 않을 것으로 추정되며 보고된 경우도 드물다. 그러나 외국인과의 접촉이 빈번해진 최근에는 예전에 비해 드물지 않을 것으로 추정되며, 따라서 경부에 림프절이 양성 비후와 특징적인 병리 소견을 보인다면 톡소플라즈마 림프절염의 가능성을 생각해 보는 것이 좋겠다. 이에 저자 등은 면역기능이 정상인 사람에서 톡소플라즈마 림프절염을 경험하였기에 문헌 고찰과 함께 보고하는 바이다. Toxoplasma lymphadenitis is the most common clinical manifestation of toxoplasmosis in an immunocpmpetent host. In foreign countries, it is a relatively common etiology of reactive hyperplasia of lymph nodes, but it is still rare in Korea. The cervical lymph nodes are most commonly involved, whereas systemic manifestations are rare. We are reporting a case of toxoplasma lymphadenitis in an immunocompetent host. A 31-year-old man was admitted to the hospital because of submandibular lymph node enlargement for 3 months. Toxoplasma lymphadenitis was diagnosed by positive IgG and IgM toxoplasma antibody titer and specific pathologic findings of submandibular lymph node, such as reactive follicular hyperplasia, epitheioid histiocytes in the interfollicular area, and infiltrations of subcapsular monocytoid B lymphocytes. In Korea, travels to and from other countries and contacts with foreigners are increasing, possibly increasing the incidence of toxoplasma lymphadenitis, which should be considered in the differential diagnosis of lymphadenitis.

재래종과 개량종 세절 돼지고기의 저장 중 품질 특성 비교

이성기,주명규,김용선,강선문,최염순,Lee Sung Ki,Ju Myung Kyu,Kim Yong Sun,Kang Sun-Moon,Choi Yeom-Soon 한국축산식품학회 2005 한국축산식품학회지 Vol.25 No.1

This study was carry out to investigate the quality characteristics of Korean native black ground pork compared with modern genotype ground pork during refrigerated storage. Korean native black pig and modern genotype pig were slaughtered at 75 kg and 105 kg of live weight, and for 240 days and 210 days of feeding periods, respectively. The ground lean pork (M. semimembranosus) was stored for 9 days at 4℃. The crude fat and crude protein contents were significantly (p<0.05) higher in Korean native black pork. The pH value after 5 days of storage was significantly (p<0.05) lower in Korean native black pork than in modern genotype pork. WHC of Korean native black pork was significantly (p<0.05) higher than that of modern genotype pork over time. The Korean native black pork maintained black reddish color because it had lower CIE L/sup */ value and higher CIE a/sup */ value than the modern genotype pork. CIE L/sup */, b/sup */, C/sup */ and h/sup O/ values decreased as storage time increased. TBARS (thiobarbituric acid reactive substance), POV (peroxide value) and FOX (ferrous oxidation xylenol orange) tended to increase as storage time increased in all of the groups, in particular, those values increased more rapidly in Korean native black pork. Total saturated fatty acid and stearic acid contents had significantly higher in Korean native black pork (p<0.05). 본 연구는 재래종 세절 돼지고기의 저장 중 품질 특성을 구명하기 위하여 개량종과 비교하여 실시하였다. 시험용 돼지고기로 240일간 사육된 평균체중 75 kg의 재래돼지와 210일간 사육된 평균체중 105 kg의 개량돼지를 이용하였다. 도축 후 세절돈육을 4℃에서 9일간 저장하며 실시하였다. 일반성분의 조성을 보면 재래종 돼지고기가 개량종에 비해 조지방과 조단백질 함량이 높고, 수분과 조회분 함량은 낮았다. 재래종 돼지고기의 pH가 개량종에 비해 저장 5일부터는 낮았고, 보수력은 저장기간 내내 유의적으로 높았다(p<0.05). 재래종 돼지고기는 명도가 낮고 적색도가 높아 개량종에 비해 검붉은 색깔을 지니고 있다. 저장기간이 늘어날수록 CIE L/sup */, a/sup */, b/sup */와 h/sup O/값들은 감소하는 경향을 보였다. TBARS, POV, FOX값 모두 저장기간이 증가할수록 유의적으로 증가하였으며 특히 재래종이 저장기간이 길어질수록 현저한 증가현상을 나타내었다. 재래종 돼지고기의 지방산 조성비율을 보면 총 포화지방산과 stearic acid 함량이 개량종에 비해 유의적으로 높았다(p<0.05).

Design of a Two-Dimensional Proportional Solenoid for Miniature Directional Control Pneumatic Valves

Yeh-Sun Hong,Dong-Hyun Ha,Myung-Ki Yeom 대한기계학회 2003 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.17 No.7

In this paper, a new proportional solenoid invented for pneumatic directional control valves is introduced. The new proportional solenoid has two-dimensional structure and a pivoting armature on which the friction force is inherently negligible. Another advantageous feature of this solenoid is that its mechanical parts can be easily manufactured and assembled. The working principle and design example of the now proportional solenoid. its application to the activation of a 4/3-way directional control valve, and the evaluation of its control performance in a position control loop are reported.

발진출력 측정을 통한 94 GHz Gunn Diode의 최대 전력 조사

이동현(Dong-Hyun Lee),염경환(Kyung-Whan Yeom),정명숙(Myung-Suk Jung),전영훈(Young-Hoon Chun),강연덕(Yeon-Duk Kang),한기웅(Ki-Woong Han) 한국전자파학회 2015 한국전자파학회논문지 Vol.26 No.5

본 논문에서는 94 GHz Gunn 고정발진기를 설계 및 제작하였고, 이를 이용하여 발진기에 사용된 Gunn 다이오드의 최대 전력을 조사하였다. 94 GHz Gunn 고정발진기는 InP Gunn 다이오드가 사용되었고, WR-10 도파관 구조로 설계 및 제작되었다. 제작된 발진기는 발진주파수 95 GHz에서 12.64 dBm의 출력 전력과 1 MHz 오프셋 주파수에서 ?92.7 dBc/Hz의 위상잡음 성능을 보였다. 발진기에 사용된 InP Gunn 다이오드의 최대 전력을 조사하기 위해서 발진기 구조를 턱이 있는 구조로 수정하였다. 그리고 이 턱의 높이를 변화시켜, 발진기가 몇 가지의 다른 부하 임피던스를 갖도록 하였다. 이 몇 가지의 다른 부하 임피던스에 대한 결과로써, 포스트 면에서의 부하 실수부 GL에 대한 발진 신호 V²의 그래프를 얻었다. 이 GL?V²의 그래프를 이용하여, 바이어스 포스트의 손실이 포함된 Gunn 다이오드의 최대 전력 16.8 dBm을 얻었다. 그리고 short된 Gunn 다이오드와 제로 바이어스 상태의 Gunn 다이오드를 이용하여 바이어스 포스트의 손실을 계산하였다. 바이어스 포스트의 손실을 보상한 InP Gunn 다이오드만의 최대 전력은 95 GHz에서 18.55 dBm이다. 이는 사용된 Gunn 다이오드의 데이터시트에 가까운 결과이다. In this paper, design and implementation of the 94 GHz Gunn oscillator and the evaluation of the maximum power of the Gunn diode used in the oscillator are presented. The 94 GHz Gunn oscillator is used InP Gunn diode and designed employing a WR-10 waveguide. The designed oscillator is fabricated through machining and its performance is measured. The fabricated oscillator shows an oscillation frequency of 95 GHz, output power of 12.64 dBm, and phase noise of ?92.7 dBc/Hz at 1 MHz offset frequency. To evaluation the maximum power of the InP Gunn diode used in oscillator, the oscillator structure is modified to a structure having a diaphram. The height of thick diaphram which is used in the oscillator is varied. As a result, an oscillator has several different load impedances, which makes it possible to plot GL?V² plot at the post plane. Using the GL?V² plot, the maximum power of used Gunn diode including post is computed to be 16.8 dBm. Furthermore using the shorted and zero bias Gunn diode, the post loss used for DC biasing can be computed. Using the two losses, The maximum power of a InP Gunn diode is computed to be 18.55 dBm at 95 GHz. This result is close to a datasheet.

The Daidzein Metabolite, 6,7,4'-Trihydroxyisoflavone, Is a Novel Inhibitor of PKCα in Suppressing Solar UV-Induced Matrix Metalloproteinase 1

Lim, Tae-Gyu,Kim, Jong-Eun,Lee, Sung-Young,Park, Jun Seong,Yeom, Myung Hun,Chen, Hanyong,Bode, Ann M.,Dong, Zigang,Lee, Ki Won MDPI 2014 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES Vol.15 No.11

<P>Soy isoflavone is an attractive source of functional cosmetic materials with anti-wrinkle, whitening and skin hydration effects. After consumption, the majority of soy isoflavones are converted to their metabolites in the human gastrointestinal tract. To understand the physiological impact of soy isoflavone on the human body, it is necessary to evaluate and address the biological function of its metabolites. In this study, we investigated the effect of 6,7,4'-trihydroxyisoflavone (6,7,4'-THIF), a major metabolite of daidzein, against solar UV (sUV)-induced matrix metalloproteinases (MMPs) in normal human dermal fibroblasts. MMPs play a critical role in the degradation of collagen in skin, thereby accelerating the aging process of skin. The mitogen-activated protein/extracellular signal-regulated kinase (MEK)/extracellular signal-regulated kinase (ERK), mitogen-activated protein kinase (MKK)3/6/p38 and MKK4/c-Jun <I>N</I>-terminal kinases (JNK) signaling pathways are known to modulate MMP-1 function, and their activation by sUV was significantly reduced by 6,7,4'-THIF pretreatment. Our results also indicated that the enzyme activity of protein kinase C (PKC)α, an upstream regulator of MKKs signaling, is suppressed by 6,7,4'-THIF using the<I> in vitro</I> kinase assay. Furthermore, the direct interaction between 6,7,4'-THIF and endogenous PKCα was confirmed using the pull-down assay. Not only sUV-induced MMP-1 expression, but also sUV-induced signaling pathway activation were decreased in PKCα knockdown cells. Overall, we elucidated the inhibitory effect of 6,7,4'-THIF on sUV-induced MMPs and suggest PKCα as its direct molecular target.</P>