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초파리 TFIIB, TBP 유전자들의 Promoter 부위 비교 및 발현
이광수,오윤상,최강률,백광희,윤재승 경희대학교 유전공학연구소 1995 遺傳工學論文集 Vol.7 No.-
Our main interest is the regulation of expression of the genes for general transcription factors involved in the transcription process by RNA polymerase Ⅱ. For this purpose, we have been trying to isolate and characterize the genomic clones encoding various transcription factors of Drosophila melanogaster. In this paper, we report the DNA sequences of the promoter regions of Drosophila TFIIB and TBP genes and suggest some consensus features in those regions We also present the developmental profile of mRNA expression of those two Drosophila genes. The data altogather suggest some common mechanism existing in the regulation of the expression of these two Drosophila genes.
( Seong Baek Lee ),( Jeong Soo Park ),( Seung Hee Lee ),( Jun Ho Park ),( Sung Ryul Yu ),( Hee Chan Kim ),( Dong Jun Kim ),( Tae Ho Byun ),( Kwang Hee Baek ),( Young Joon Ahn ),( Jae Seung Yoon ) 한국미생물 · 생명공학회 2008 Journal of microbiology and biotechnology Vol.18 No.1
Vascular endothelial growth factors (VEGFs) are a family of proteins that mediate angiogenesis. VEGF165 is a VEGF-A isoform and has been extensively studied owing to its potential use in therapeutic angiogenesis. This study established Chinese hamster ovary (CHO) cells overexpressing recombinant human VEGF165 (rhVEGF165) protein. The production rate of the established CHO cells was over 80 mg/l of rhVEGF165 protein from a 7-day batch culture process using a 7.5-l bioreactor with a 5-l working volume and serum-free medium. The rhVEGF165 protein was purified to homogeneity from the culture supernatant using a two-step chromatographic procedure that resulted in a 48% recovery rate. The purified rhVEGF165 protein was a glycosylated homodimeric protein with a higher molecular weight (MW) than the protein expressed from insect cells, suggesting that the glycosylation of the rhVEGF165 protein in CHO cells differed from that in insect cells. The purified rhVEGF165 protein in this study was functionally active with a half-maximal effective concentration of 3.8 ng/ml and specific activity of 2.5×105 U/mg.
한광일(Kwang-Il Han),김한솔(Han-Sol Kim),백광렬(Kwang Ryul Baek) 제어로봇시스템학회 2017 제어·로봇·시스템학회 논문지 Vol.23 No.8
In this paper, we propose a new method to measure the velocity of a vehicle. In general, to measure the velocity of a vehicle, a global positioning system (GPS) is used outdoors and encoders with an INS are used indoors. However these sensors have various problems due to their characteristics. Within a tunnel, GPS cannot measure velocity. In addition, encoders, in essence, have errors due to slip. To solve such problems, we propose a velocity-measuring method using two magnetic sensors for reading the magnetic field. We can find the velocity by estimating the delay time between two axially separated sensors. To verify the performance, we compared the actual and measured speed with the proposed method. As a result, it was found that the proposed method has a good performance in the simulation and useful results in the real experiment. Additionally, in this method, a magnetic map is not required.
월악산에 서식하는 노랑할미새 Motacilla cinerea의 번식생태
염광석(Kwang-Seok Youm),백충렬(Choong-Ryul Baek),이진희(Jin-Hee Yi),정진우(Jin-Woo Jung),오태훈(Tea-Hoon Oh),조삼래(Sam-Rae Cho) 한국조류학회II 2011 한국조류학회지 Vol.18 No.2
본 연구는 충청북도 제천시 월악산 국립공원에서 2009년 4월부터 2010년 8월까지 노랑할미새의 번식생태를 연구하였다. 노랑할미새의 둥지크기는 장경이 160.72±48.24㎜, 단경이 104.93±25.11㎜, 두께가 48.99±7.16㎜, 무게가 37.45±2.81g이였다. 둥지의 재료는 마른풀이 18.002±1.927(52.51%)g, 토양이 9.127±1.547(26.62%)g, 나무뿌리가 3.553±0.304(10.36%)g, 이끼류가 2.895±0.841(8.44%)g, 기타가 0.706±0.505(2.06%)g이였다. 영소지 선택장소는 자연구조물(13.04%)보단 인공구조물(86.96%)을 선호하는 것으로 조사 되었다(X²-test, P<0.05). 알의 크기는 장경이 18.39±1.02㎜, 단경이 14.46±0.63㎜, 무게가 1.84±0.12g이며, 형태지수는 78.85±5.84%로 나타났다. 한배산란수는 3~7개를 가지며, 평균 한배산란수는 4.78±0.92개였다. 부화성공률은 75.86±15.64%, 이소성공률은 71.59±15.53%, 번식성공률이 54.31±11.78%로 나타났다. We had surveyed about breeding ecology of Grey Wagtail at the in Wor-Ak Mountain from April 2009 to August 2010. It has 160.72±48.24㎜ in outside diameter of nest, 104.93±25.11㎜ in inner diameter and 37.45±2.81g of weight. The nest materials were dry grasses, soil, root, moss type and others. Nest site choice natural structures than prefer artificial structures (X²-test, P<0.05). The eggs had 18.39±1.02㎜ of length, 14.46±0.63㎜ of width, 1.84±0.12g of mass and 78.85±5.84% of shape index, respectively the clutch size was 4.78±0.92 and hatching success was 75.86%, fledgling success 71.59%, breeding success was 54.31%.
Indoor Dead Reckoning Localization Using Ultrasonic Anemometer with IMU
Seo, Woojin,Baek, Kwang-Ryul Hindawi Limited 2017 Journal of sensors Vol.2017 No.-
<P>Dead reckoning is an important aspect of estimating the instantaneous position of a mobile robot. An inertial measurement unit (IMU) is generally used for dead reckoning because it measures triaxis acceleration and triaxis angular velocities in order to estimate the position of the mobile robot. Positioning with inertial data is reasonable for a short period of time. However, the velocity, position, and attitude errors increase over time. Much research has been conducted in ways to reduce these errors. To position a mobile robot, an absolute positioning method can be combined with dead reckoning. The performance of a combined positioning method can be improved based on improvement in dead reckoning. In this paper, an ultrasonic anemometer is used to improve the performance of dead reckoning when indoors. A new approach to the equation of an ultrasonic anemometer is proposed. The ultrasonic anemometer prevents divergence of the mobile robot’s velocity. To position a mobile robot indoors, the ultrasonic anemometer measures the relative movement of air while the robot moves through static air. Velocity data from the ultrasonic anemometer and the acceleration and angular velocity data from the IMU are combined via Kalman filter. Finally we show that the proposed method has the performance with a positioning method using encoders on a good floor condition.</P>
오목눈이 Aegithalos caudatus의 번식생태와 서로 다른 두 서식지에서의 번식성공률 차이
백충렬(Chung-Ryul Baek),이진희(Jin-Hee Yi),염광석(Kwang-Suk Yeom),노선호(Sun-Ho No),이상덕(Sang-Duk Lee),조삼래(Sam-Rae Cho) 한국조류학회II 2011 한국조류학회지 Vol.18 No.4
본 연구는 2009년 3월부터 2009년 11월까지 공주대학교 교내·지역과 계룡산국립공원에서 번식하는 오목눈이 Aegithalos caudatus를 대상으로 조사하였다. 오목눈이의 둥지는 이끼류와 거미줄을 이용하여 길쭉한 타원형의 호리병 모양으로 만들며, 둥지의 크기는 장경이 223.49±16.52mm, 단경이 96.45±11.98mm, 깊이가 109.46±9.54mm였다. 오목눈이의 한배산란수는 8.63±1.21개이며, 부화율은 95.73%, 이소율은 75.79% 그리고 번식성공률은 72.56%로 나타났다(Mann-whitney Utest P<0.05). 알의 크기는 장경이 14.50±0.93mm, 단경이 11.20±0.37mm, 무게가 1.23±0.18g 이였으며, 알의 형태지수는 78.45±1.25%로 타원형에 가까웠다. 포란기간은 16.89±1.29일이며, 육추기간은 16.24±1.25일 이였다. 오목눈이 유조의 성장은 완만한 S자형 곡선을 이루었다. 부리와 부척에 관한 성장에서 비교적 고른 성장을 보였고, 깃털의 영향을 받는 전장, 꼬리, 날개는 초기 이후 급속한 성장을 보였다. 공주대학교 교내·지역과 계룡산국립공원에서의 번식성공률은 각각 80.80%와 60.00%(Mann-whitney U test P<0.05)로 나타났으며, 오목눈이의 번식성공률은 서식지의 조건(먹이자원 등)보다 천적의 밀도가 영향을 미치는 것으로 생각된다. We surveyed about breeding ecology of Long-tailed Tit in Kongju National University and Gye-ryong Mountain from March 2009 to October 2010. Long-tailed Tit Aegithalos caudatus spent about 59-66 days on nesting, laying, incubating and fledging. Its nest was made of the moss type and the spider web and its shape was like a longish elliptical calabash. It had 223.49±16.52mm in outside diameter of nest, 96.45±11.98mm in inner diameter and 109.46±9.54mm of thickness. The number of the clutch size was 8.25±1.14 and hatching success was 95.73%, fledging success was 75.79%, breeding success was 72.56% (Mann-whitney U test P<0.05). The eggs were 14.50 ±0.93mm of length, 11.20±0.37mm of width, 0.90±0.44g of mass and 78.45±1.25% of shape index. The mean incubation period was 16±1.23days and parental care period was 15.75±1.14 days. The growth of the chicks was gentle S curve drew. The growth of the bill and tarsus was relatively shown gentle growth, and the total length, the length of tails and wings which are influenced by feathers were grown rapidly. I guess that its breeding success rate was more affected by the habitat density of the natural enemy than the condition of the habitat density (food resources etc.)