http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
전자토모그래피의 정량적 분석에서 대물렌즈 조리개의 영향
김진규,이상희,권희석,정종만,정원구,이수정,주형태,김윤중 韓國電子顯微鏡學會 2008 Applied microscopy Vol.38 No.4
Electron tomography의 정량적 분석을 위해서 대물렌즈 조리개가 투과빔의 강도에 미치는 영향을 평가하였다. Electron tomography에 도입되는 Beer’s law의 올바른 적용을 위해서는 투과빔은 시료의 기울기에 따른 mass thickness의 변화에 의한 효과만을 반영해야 한다. 그러므로 빔 경로상의 대물렌즈 조리개, 홀더 등에 의한 다른 효과는 제거되어야 한다. 본 연구에서는 대물렌즈 조리개의 cut-off 효과를 120 kV TEM과 Quantifoil holey 카본 시료를 이용하여 상세히 평가하였다. 대물렌즈 조리개를 사용하지 않은 경우와 비교할 때, 30 μm 크기의 대물렌즈 조리개를 통과한 투과전자빔의 강도는 약 16.7%의 감소가 일어난다. 또한 55˚이상의 고경사각 기울기에서는 대물렌즈 조리개의 cut-off 효과에 의해 14.2%의 강도 감소가 추가적으로 발생함을 알 수 있었다. Electron tomography에서 정량적 분석을 위해서는 이러한 대물렌즈 조리개의 영향을 고려해야만 한다. 또한 Beer’s law의 올바른 적용을 위해서는 일련의 기울기에 따른 2차원적 영상은 가능하면 대물렌즈 조리개를 사용하지 않은 상태에서 획득하는 것이 바람직하다. We have evaluated the effects of experimental factors on transmitted electron beam intensities for quantitative analysis in electron tomography. For the correct application of Beer’s law in electron tomography, the transmitted beam intensity should reflect the net effect of mass properties on beam path. So, the any other effects of the objective aperture and the specimen holder on beam path should be removed. The cut-off effects of objective aperture were examined using Quantifoil holey carbon film and a transmission electron microscope operated at 120 kV. The transmitted beam intensities with 30 μm objective aperture dropped about 16.7% compared to electron beam intensities without the objective aperture. Also, the additional losses of about 14.2% at high tilt angles were occurred by cut-off effects of the objective apertures. For the precise quantitative analysis in electron tomography, the effect of the objective aperture on transmitted electron beam intensities should be considered. It is desirable that 2-D tilt series images are obtained without the objective aperture for correct application of Bee’s law.
횡문근 융해증과 동반된 갑상선 중독성 주기성 마비 1예
권경희,이창훈,최경숙,백승훈,이명수,박병현,조정구 대한내과학회 2004 대한내과학회지 Vol.66 No.2
갑상선 항진증에서 횡문근 융해증은 아주 드물게 동반되며 근효소의 상승 또한 드물다. 갑상선 중독성 마비는 여러 선생인자에 의해 유발될 수 있고 마비 당시 저칼륨혈증을 자주 동반한다. 저자들은 갑상선 중독성 주기성 마비로 내원한 23세 남자 환자에서 저칼륨혈증과 하지마비가 회복되는 과정에서 일시적인 횡문근 융해증을 보인 증례를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Hyperthyroidism has been associated with changes in muscle function such as thyrotoxic myopathy, thyrotoxic periodic paralysis and thyroid opthalomopathy, but rarely rhabdomyolysis. Usually serum creatinine kinase is either normal or low in Hyperthyroidism. Only 3 reports described association between rhabdomyolysis and Hyperthyroidism, no previous literatures have thyrotoxic periodic paralysis associated rhadbomyolysis. Patients with hypokalemic periodic paralysis sometimes elevated serum muscle protein during recovery from paralytic attack, but the mechanism was not well known. We report a patient who presented with clinical feature of thyrotoxic periodic paralysis and increasing serum CK, myoglobin during recovery from paralysis.
( Hee Jong Woo ),( Chan Mi Chung ),( Kong Sik Shin ),( Myung Ho Lim ),( Ki Jong Lee ),( Yong Gu Cho ),( Soon Jong Kweon ),( Seok Cheol Suh ) 한국응용생명화학회(구 한국농화학회) 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.6
A novel genetically modified organism (GMO) detection method was developed using a simple and rapid procedure to identify a regulatory gene introduced into genetically modified (GM) maize. After DNA extraction from GM maize flours, fragments of the conserved sequence of the cauliflower masaic virus (CaMV) 35S promoter gene along with a competitive internal control gene were amplified using duplex polymerase chain reaction (PCR). Amplification products were then detected using a disposable detection device. The quantitative detection limit for GM maize 59122 was found to be 1.0% (w/w). Because the combination-method involving PCR technology coupled with a disposable detection device does not require expensive instrumentation or expertise, it will serve as a valuable alternative to immunoassays and traditional PCR-based tests in the detection of GMOs.
권경희,김현정,양봉준,백승훈,이명수,박병현,조정구 대한내과학회 2004 대한내과학회지 Vol.66 No.2
쉬한증후군 환자에서 T파 역전, QT간격 연장과 함께 재발성 심실빈맥이 발생하였고, 적절한 호르몬 보충 치료후 심전도 이상이 정상으로 회복된 예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Electrocardiographic abnormalities commonly associated with hypopituitarism are low QRS voltage, ST-segment depression, inverted T waves and a prolonged QT interval. Although the mechanism remains unclear, glucocorticoid therapy, an intracelluar-extracellular electrolyte imbalance of myocytes, and histopathological changes in the myocardium are thought to play a role in this disorder. We discribe a 64 year old woman with recurrent ventricular tachycardia associated with QT prolongation in Sheehan's syndrome. Ventricualr tachycardia was treated by lidocain and direct current cardioversion. Sheehan's syndrome was confirmed by past history, anterior pituirary stimulation test and brain MRI showed empty sella. After hormone replacement treatment, inverted T waves and prolonged QT interval was normalized and ventricular tachycardia did not recur.
Woo, Hee-Jong,Chung, Chan-Mi,Shin, Kong-Sik,Lim, Myung-Ho,Lee, Ki-Jong,Cho, Yong-Gu,Kweon, Soon-Jong,Suh, Seok-Cheol The Korean Society for Applied Biological Chemistr 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.6
A novel genetically modified organism (GMO) detection method was developed using a simple and rapid procedure to identify a regulatory gene introduced into genetically modified (GM) maize. After DNA extraction from GM maize flours, fragments of the conserved sequence of the cauliflower masaic virus (CaMV) 35S promoter gene along with a competitive internal control gene were amplified using duplex polymerase chain reaction (PCR). Amplification products were then detected using a disposable detection device. The quantitative detection limit for GM maize 59122 was found to be 1.0% (w/w). Because the combination-method involving PCR technology coupled with a disposable detection device does not require expensive instrumentation or expertise, it will serve as a valuable alternative to immunoassays and traditional PCR-based tests in the detection of GMOs.
소와 돼지도체에서 Listeria monocytogenes의 분리 및 PCR 검출 방법에 관한 연구
채희선 ( Hee Sun Chae ),김두환 ( Doo Hwan Kim ),김규현 ( Gu Hyun Kim ),신방우 ( Bang Woo Shin ),조미영 ( Mi Yoeng Jo ),권택부 ( Taek Boo Kweon ),이정학 ( Jung Hak Lee ) 한국가축위생학회 2003 韓國家畜衛生學會誌 Vol.26 No.2
From February 2000 to December 2001, A total of 1,785 samples was taken from beef and pork carcasses in Seoul. Seven(0.69%) Listeria spp. were isolated from the 1,014 of beef carcasses, and five(0.65%) were isolated from the 771 of pork carcasses. The isolates were identified L monocytogenes by API listeria, and VIDAS LMO kit, serological test and PCR assay were performed. A total 12 strains of L monocytogenes were isolated form samples tested and all of the strains were classified into serotype 1. PCR primers are selected to amplify a 520-base pair(bp) DNA fragment from the listeolysin O gene(hlyA) of Listeria monocytogenes. A 520-bp product was detected in PCR with DNA from L monocytogenes, but not from the other Listeria species tested.