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Kim, Youngsam,Jang, Yoon Jeong,Lee, Dongyoul,Kim, Byung-Sup,Churchill, David G. Elsevier 2017 Sensors and actuators. B, Chemical Vol.238 No.-
<P><B>Abstract</B></P> <P>Herein, a chemical probe is tested with live agents for the purpose of benchmarking fluorescent pyridyl-containing systems with actual nerve agents and simulants together. The molecule showed selective fluorogenic and colorimetric detection of Soman (GD) and its simulant over other G-series nerve agents and their simulants. <SUP>1</SUP>H and <SUP>31</SUP>P NMR spectroscopy and TD-DFT calculations help reveal the origin of the colorimetric and fluorogenic changes in the reacted system.</P>
Graphene oxide assisted spontaneous growth of V2O5 nanowires at room temperature.
Lee, Minoh,Hong, Won G,Jeong, Hu Young,Balasingam, Suresh Kannan,Lee, Zonghoon,Chang, Sung-Jin,Kim, Byung Hoon,Jun, Yongseok RSC Pub 2014 Nanoscale Vol.6 No.19
<P>Graphene-decorated single crystalline V2O5 nanowires (G-VONs) have been synthesized by mixing graphene oxide (GO) and V2O5 suspensions at room temperature. In this process, V2O5 nanowires (VONs) are formed spontaneously from commercial V2O5 particles with the aid of GO. The as-formed one dimensional G-VONs were characterized by using a X-ray diffractometer, a X-ray photoelectron spectrometer, a scanning electron microscope, and a transmission electron microscope. GO plays a vital role in the VON formation with the simultaneous reduction of GO. A single G-VON showed superior electrical conductivity compared with that of the pure VONs obtained from the sol-gel method. This could be ascribed to the insertion of rGO sheets into the V2O5 layered structure, which was further confirmed by electron energy loss spectroscopy.</P>
김하영,정희원,조병규,한대희,지제근,최길수,심보성 대한신경외과학회 1986 Journal of Korean neurosurgical society Vol.15 No.4
The authors reviewed 37 consecutive cases of histologically proven oligodendroglioma who were treated at the Seoul National University Hospital, between 1979 and 1986. There was a 1.5:1 male to female ratio. The age of patients at the time of diagnosis varied between 6 and 64 years(mean 38 years), with 51% in the fourth and fifth decades. The incidence of oligodendrogliomas represented 5% of all brain tumors and 15.5% of all gliomas. All but one were located supratentorially and 54% of them involved the frontal lobe. The mean duration of symptoms prior to the surgery was 27.2 months, but seizures had a considerably longer duration of 6.4 years. The common symptoms were headache(62%), seizures( 38%), and motor weakness( 22%). The common neurological findings were papilledema(51%), motor deficit(24%), and change in cognition(19%). Six out of 37 cases(16%) presented as the spontaneous intracranial hemorrhage. Calcifications were detected on plain X-ray films of the skull in 19% of patients and fine vascular stains were found on carotid angiograms in 30% of the cases. Brain CT revealed calcification(57%), cyst formation(43%),low density(35%) and heterogenous contrast enhancement (35%). The important factors affecting the prognosis and the recurrence rate were (1) the extent of surgical excision, (2) postoperative radiation therapy, and (3) the pathologic grading. There was a significant difference in the recurrence rate between patients treated with postoperative irradiation and patients treated with surgery alone.
두개강내 상의세포종 : 임상적 병리적 특성 및 예후결정인자 Clinicopathologic Features and Prognostic Factors
김동규,조병규,양희진,지제근,정희원,김현집,최길수,한대희 대한신경외과학회 1991 Journal of Korean neurosurgical society Vol.20 No.10-11
The clinical and pathologic features, including prognostic factors and survival data, were analyzed for 23 patients with intracranial ependymoma treated surgically at the Seoul National University Hospital during the years 1979 to 1990. The age at diagnosis ranged from 2 months to 55 years(mean : 14.9 years). The male to female ratio was 10:13. Fifteen patients(65%) were under the age of 15. The tumors of twenty one patients(91%) were located infratentorially. The adjusted overall 5-year-survival rate of infratentorial ependymomas was 77% excluding 4 cases of surgical mortality(Kaplan-Meier method). The period of follow-up ranged from 2 to 70 months. No correlation was possible between 5-year-survival rate and extent of tumor, age group(below and above 6 years), extent of removal, or pathologic grading. Clinical or pathological evidence of spinal metastasis was not found.
전척수 수질내 종양 : 신경절교종 1예 Ganglioglioma A Case Report
김정훈,왕규창,조병규,오창완,지제근,최길수 대한신경외과학회 1990 Journal of Korean neurosurgical society Vol.19 No.2
Spinal cord ganglioglioma is an extremely rare tumor. Authors present a 6-year old boy who had a holocord ganglioglioma with a long history of kypho-scoliosis. The mass was located entirely in the spinal cord and mixed cystic and solid with variable consistencies. The color was grayish purple-yellow in soft part, and pale yellow-white in scirrhoid part. It was not well demarcated by surrounding normal spinal cord in major parts.
원발성 척수내 다형성 교아세포종 3례 : Report of 3 Cases
김하영,정희원,김현집,조병규,지제근,심보성 대한신경외과학회 1985 Journal of Korean neurosurgical society Vol.14 No.2
The authors report 3 cases of primary intramedullary glioblastoma multiforme which is relatively rare among spinal cord tumors. They were located at the thoracolumbar, cervical and conus medullaris region respectively. Clinical, radiographic and pathological material are presented and the literature is discussed.
김창진,이선호,정희원,조병규,심보성,지제근 대한신경외과학회 1984 Journal of Korean neurosurgical society Vol.13 No.1
Schwannomas arising from the cranial nerves of the jugular foramen are rare, only 50 cases including 15 glossopharyngeal schwannomas have been reported. They may be confused with the far more common acoustic schwannoma because of the presenting symptom of hearing loss. With the symptoms and signs of the lower cranial nerve involvement, the characteristic radiographic findings of enlarged Jugular foramen and normal internal acoustic meatus can make the diagnosis. The authors review the literature and present a unique case of glossopharyngeal schwannoma which had intra-and extracranial growth with intrapetrosal extension.
김동호,이현구,조병규,최길수,지제근 대한신경외과학회 1983 Journal of Korean neurosurgical society Vol.12 No.1
Reticulum cell sarcoma occurs rarely in cevtral nervous system. It occupies 1 - 2.5% of all brain tumors. The prognosis is known to be very poor: 3 weeks of mean survival time in case of no treatment, 2 months of mean survival time in case of only surgery, 9 months-3 years of mean survival time in case of both surgery and radiation. We have experienced a case of reticulum cell sarcoma in brain and obtained a good result after surgery and radiation. We report our case with a brief review of the articles.
마취된 흰쥐 해마신경세포에서 Neurobiotion 이온주입으로 인한 신경세포의 생리적 특성의 변화
이만기,이헤숙,김영진,최병주 大韓小兒齒科學會 1999 大韓小兒齒科學會誌 Vol.26 No.2
마취된 흰쥐를 사용하여 해마의 CA영역에 위치한 피라밋 세포들의 세포막 특성을 in vivo의 세포내 기록법에 의해서 관찰한 후 2.5% neurobiotin을 세포내 기록용 미세전극에 채워 세포내로 충진시킨후 충진전과 동일한 실험순서로 반응을 다시 관찰하고 ABC kit를 이용하여 면역조직염색을 행하여 형태학적인 관찰을 하였다. 피라밋세포의 세포내 반응 특성은 높은 휴지막 세포막전위, 낮은 input resistance 그리고 큰 활동전위를 가졌다. neurobiotin 충진 전·후에 따른 세포막 특성의 변화는 sustained AHP의 duration과 amplitude, input resistance. 그리고 세포외 및 세포내 자극에 따른 AP 수에서 유의한 차이를 보였고(P<0.05). 세포외 자극에 의한 억제는 주로 전반부에 나타났으며 CA3 영역에 위치한 이 세포의 형태학적 관찰 결과 세포체는 피라밋층에서 분명한 피라미드 형태를 띄고 있었고, 기저 및 선단 가지가 각각 백색판층 및 섬유방-분자층까지 뻗어 있어으며 축삭은 겉질을 향해 기저가지 돌기면에서 수직으로 뻗어 있었다. 해마의 주세포인 피라밋세포의 세포막 특성과 세포내 염색지시체(marker)로 주로 쓰이는 neurobiotin에 의해 세포막 특성중 일부가 변화됨을 알 수 있었고, 뇌내의 신경세포연결망이 완전히 보존되어 세포들 사이에 시냅스관계를 추측할 수 있는 in vivo 실험 모델이 응용될 수 있음을 제시하였다. Pyramidal cells in the hippocampal CA area were recorded from and filled with neurobiotin in anesthetized rats. The extent of their dendrites and the electropharmacological properties of membrane as well as the effect before and after neurobiotion injection were examined. Pyramidal cells had a high resting membrane potential, a low input resistance, and a large amplitude action potential. A afterhyperpolarization was followed a single action potential. Most pyramidal cells did not display a spontaneous firing. Pyramidal cell displayed weak inward rectification and anodal break excitation in response to negative current injection into the cell. Membrane properties of recorded neurons before and after neurobiotin injection with consecutive current injection were compared. Some properties were significantly increased after labelling(P>0.05) ; the duration and amplitude of sustained AHP, input resistance, and the number of action potentials for simultaneous intra-and extracellular stimulations. Neurobiotin-filled neurons showed pyramidal morphology. Cells were generally bipolar dendrite processes ramifying in stratum lacunosum-moleculare, radiatum, and oriens.