Ganglioside GM1 influences the proliferation rate of mouse induced pluripotent stem cells

( Jae-sung Ryu ),( Kyu-tae Chang ),( Ju-taek Lee ),( Malg-um Lim ),( Hyun-ki Min ),( Yoon-ju Na ),( Su-bin Lee ),( Gislain Moussavou ),( Sun-uk Kim ),( Ji-su Kim ),( Kinarm Ko ),( Kisung Ko ),( Kyung- 생화학분자생물학회(구 한국생화학분자생물학회) 2017 BMB Reports Vol.50 No.6

The ACKNOWLEDGEMENTS should be corrected as follows, "This research was supported by a grant (Code# PJ0074922012) from the Korean Rural Development Administration, and has been supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education Science and Technology (2010-0022316 and KCG5401011), and the KRIBB/KRCF Research Initiative Program (NAP), Korea. The published article in this journal was a part of the 2013 Doctoral thesis of Jae-Sung Ryu submitted to Wonkwang University, Korea." and not "This research was supported by a grant (Code# PJ0074922012) from the Korean Rural Development Administration, and has been supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education Science and Technology (2010-0022316 and KCG5401011), and the KRIBB/KRCF Research Initiative Program (NAP), Korea."

Consideration of Diluents Selection and Input Amounts of the Hunter Process for Tantalum Production

Jae‑Jin Sim,Sang‑Hoon Choi,Yong‑Kwan Lee,Sung Gue Heo,Taek‑Soo Kim,Seok‑Jun Seo,Kyoung‑Tae Park 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.7

Tantalum (Ta) is a heavy refractory metal with an atomic weight of 180.95 g/mol, a density of 16.6 g/cm3, and a high meltingpoint of 3017 °C. With its refractory characteristics, it shows excellent chemical and physical stability as well as corrosionand heat resistance at elevated temperatures. The demand for Ta metal and related compounds is increasing with the expansionof the electronics and chemical industries. The Hunter process was proven to be effective in producing Ta powder in1953. Hunter proposed a method in which potassium heptafluorotantalate (K2TaF7) was reduced by sodium (Na). Thus far,this process has been the primary commercial method to produce Ta powder. In this study, quantitative differences wereanalyzed for diluent selection. Additionally, consideration was given to changes in the caloric value depending on the inputamount of diluents. Finally, the optimum material input and the properties of the prepared Ta were analyzed. Stoichiometricratios of K2TaF7(1 mol), NaCl (6.2–6.7 mol), Na (5–7 mol) were weighed, to perform a metallothermic reduction reaction. After the reaction, the tantalum powder was recovered and the flush process was carried out. After that, it was dried in avacuum atmosphere. Physical properties such as oxygen concentration, PSA, ICP-OES, and XRD of powder were conductedto evaluate the characteristics of Ta powder that was finally manufactured.

바터 팽대부에 생긴 유암종 1예

강명주,지삼룡,박석주,이재익,조영완,김준영,박성재,박은택,이연재,이상혁,설상영,배상균 인제대학교 2006 仁濟醫學 Vol.27 No.-

Carcinoid tumors have been reported in a wide range of organs but most commonly involve the lungs, bronchi and gastrointestinal tract. Within the gastrointestinal tract, appendix is the most common location for carcinoid, followed by the distal small intestine, the rectum, and the stomach. Among these, primary involvement of the ampulla of Vater is extremely rare. We report a case of carcinoid tumor of ampulla of Vater. A 62-year-old man presented with epigastric soreness. Gastroduodenal endoscopy showed hyperemic bulging mass on ampulla of Vater and diagnosed as carcinoid tumor by histologic finding, with immunohistochemical study. In ^(111)In-octreoscan, tumor had regional lymph node metastasis, but no evidence of distant metastasis. Pancreatoduodenectomy with lymph node dissection was performed.

건강한 성인에서 발병한 칸디다와 연관된 위궤양 1례

박지훈,이상혁,김희,이재호,박성재,지삼룡,양성연,박은택,이연재,설상영,정정명,강미선 白中央醫療院 2005 仁濟醫學 Vol.26 No.1

Fungus such as Candida albicans is a normal flora that is frequently found in the oral cavity, gastrointestinal tract, genitourinary tract, vaginal mucosa in a normal person. However, candida can cause opportunistic infection in an immune compromised host. Candidiasis has broad spectrum of disease from mucocutaneous infection to invasive or disseminated infection. But, it is rarely reported that candida is associaed with gastrointestinal tract disease in a healthy adult. The case of gastric ulcer associated with candida particularly in a health adult is reported with relevant literature.

양수검사에서 small supernumerary marker chromosomes(sSMCs) 발견과 산전상담

문성택,김윤숙,전섭,최승도,선우재근,배동한 순천향의학연구소 2008 Journal of Soonchunhyang Medical Science Vol.14 No.1

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여성 골반재건술과 요실금수술에서 복강경의 역할

문성택,김윤숙,전섭,최승도,선우재근,배동한 순천향의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.1

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Dumped and Structured Packing을 이용한 알콜/물 증류

김석택,최동훈,김재홍,김장호,빌렛 라인하르트 동아대학교 환경문제연구소 2000 硏究報告 Vol.23 No.1

In this study, the diagrams for various packing shown given an impression of the effectiveness of several fraction device for separation towers in alcohol distillation. The results obtained are presented under the aspect of showing the effect of design parameters such as e. g. weir height, opening ratio, tray columns, or size of packing elements, relative void volume and surface quality for packed columns, as well as the effect of process parameters such as operating pressure, reflux ratio and phase load of the separating column. The relevant technical literature provides comprehensive information for fluid dynamic computations as well as for predetermining the separation efficiency of columns working under industrial operating conditions, this applies to tray columns and packed columns equally. The most recent computation models of thermal separation technology allow the quantitative valuation also of other efficiency when used in industrial alcohol distillation plants, and the corresponding dimensioning of columns with an accuracy that is sufficient for the requirements of practice.

Starter 및 멸치액젓 첨가가 김치양념 및 겉절이 김치의 품질에 미치는 영향

최택권,박소희,유진현,임호수,조재선,황성연 한국식생활문화학회 2003 韓國食生活文化學會誌 Vol.18 No.2

양념에 Leu. mesenteroides, Lac plantarum의 젖산균과 멸치액젓 첨가가 김치 양념의 대장균군 제어, 속성촉진여부 및 관능적 특성에 미치는 영향을 조사하였다. Leu. mesenteroides과 젓갈을 첨가한 경우 초기 숙성이 촉진되나 후기 산패는 완만하였으며 Lac. plantarum의 첨가시에는 초기 숙성에는 큰 차이가 없고 후기 산패가 현저하게 진행되었다. 대장균군은 산도 0.80% 이상에서 사멸되었는데 leu. mesenteroides의 경우가 숙성이 촉진되어 보다 신속히 사멸시켰다. 총균수와 젖산균수는 초기에 starter 첨가구는 10^6CFU/mL 정도인데 반해서 starter를 첨가하지 않은 않은 처리구에서 총균수는 10^6CFU/mL , 젖산균수가 10^4CFU/mL 이었고 숙성 후에는 첨가균이 높은 수준을 유지하였다. 하지만 대체적으로 스타터의 첨가가 숙성 및 대장균에 크게 영향을 주지 못하는 경향으로 동일하게 나왔다. 관능적 특성에서는 Leu. mesenteroides 첨가구가 Lac. plantarum의 경우보다 우수하였다. 한편, 시판 겉절이 김치는 산도가 0.09~0.18%, ph 5.46~5.89, 총균수 2.2×10^6~3.1×10^7CFU/mL, 젖산균수는 2.1×10^4~6.6×10^5CFU/mL, 대장균수는 1.8×10^4~7.1×10^5CFU/mL, 염분 1.89%~2.51%으로 스타터 첨가 겉절이에 비해 ph와 염도를 제외한 품질 특성에서 전반적으로 낮은 값을 나타냈다. This study was performed in order to investigate the effect of Leuconostoc mesenteroides, Lactobacillus plantarum and salt fermented anchovy extracts on Kimchi sauce. The sauce was fermented more rapidly by addition of Leu. mesenteroids or salt fermented anchovy extracts on the early fermentation stage than the control, but it was fermented slowly on the late fermentation stage. When L. plantarum was added to the Kimchi on the early fermentation stage, the acidity of Kimchi didn't show a significant difference from the control, but acidity was remarkably increased on the late stage. Coliform group was disappeared when acidity of sauce was higher than 0.8% during fermentation. It was controlled by Leu. mesenteroides but not by L. plantarum. Total count and lactic acid bacterial count of the sauces with starter were 6.30×10^6~1.0×10^7 CFU/mL and 1.04~2.04×10^6 CFU/mL, respectively, but those of the control sauce were 10^6 CFU/mL and 10^4 CFU/mL, respectively. Those count of the sauce with starter were higher than those of the control sauce on the later stage of fermentation. Organoleptic quality of the sauce with Leu. mesenteroides was superior to that with L. plantarum.

PD 제어기를 이용한 회전시스템의 동특성에 관한 연구

김택현,김종태,김재경 朝鮮大學校 機械技術硏究所 2005 機械技術硏究 Vol.8 No.1

기계 회전 시스템을 통하여 응답특성 및 제어효과에 대한 연구를 목적으로 하여 PD제어기를 사용하여 응답특성을 확인하였는데 제어기를 사용함은 얻고자하는 대상 플랜트의 출력 특성을 제어하는데 목적이 있다. 우선, 실험으로 들어가 시스템의 관성 (inertia), 스프링 강성(spring stiffness), 감쇠계수(damping coefficient) 등의 매개변수 값들을 측정하고, 하드웨어 게인 값을 정의한다. 다음으로 PD제어기의 설계를 하는데 우선 강체로 모델링된 시스템에서의 step 응답, ramp 응답, parabolic 응답과 sinusoidal 응답에서의 비례게인, 미분게인 값이 시스템에 미치는 영향을 통하여 제어특성과 효과를 알아보고, 2자유도(two degree of freedom) 기계 회전 시스템에 대하여 PD제어실험을 통하여 회전 시스템의 상승시간(rising time), 정착시간 (settling time) 등의 응답속도 개선, 그리고 오버슈트(overshoot), 언더슈트(undershoot) 등의 응답성능의 향상을 꾀한다. The mechanical rotation system is made up of belts, mass disks and gears. This precise piece of equipment is controlled electro-mechanically by the motor and operation program. The control strategy of the system can be changed by belts' stiffness and change of the mass and gear. This system can be modeled as a rigid body, and also finds broad application in such diverse fields as machine tools, the cruise control system in automobiles, and control in the attitude and gimbals of spacecraft. This system proves the necessity and effect of a closed loop control. The study of the mechanical rotation system excited by its base motion is not only able to predict the rotational performance, but obtain the fundamental data for vibration isolation. In this thesis, we studied the response abilities such as steady overshoot, undershoot and ect. and the response velocities such as rising time, settling time, and ect. in the mechanical rotation system. through PD control experiment..

Bubble Cap Tray, Value Tray 및 Seive Tray를 이용한 알콜/물 분리

김석택,최동훈,김재훈,김장호,빌렛 라인하르트 동아대학교 환경문제연구소 2000 硏究報告 Vol.23 No.1

In this study The diagrams for various packing shown given an impression of the effectiveness of several fraction device for separation towers in alcohol distillation. Although not claiming completeness, they are yet indicative of the influence which the characteristic design and operating parameters are having on the performance efficiency of the internals. The relevant technical literature provides comprehensive information for fluid dynamic computations as well as for predetermining the separation efficiency of columns working under industrial operating conditions, this applies to tray columns and packed columns equally. The most recent computation models of thermal separation technology allow the quantitative valuation also of other efficiency when used in industrial alcohol distillation plants, and the corresponding dimensioning of columns with an accuracy that is sufficient for the requirements of practice.