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顆粒性筋母細胞腫醫(Granular Cell myoblastoma)의 經驗例
全鳳玹 中央醫學社 1961 中央醫學 Vol.1 No.8
A case of granular cell myoblastoma was experienced in a patient of 50 year-old Korean male. The tumor was located in the subcutaneous tissue of the anterior chest wall, and its gross and histological findings were entirely compatible with those of the cases recorded in the literatures. This case was considered to be a first report in our country.
Polydiacetylene immobilized surface-enhanced Raman scattering-encoded beads for label-free detection
전봉현 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
An understanding of protein-protein interactions can be obtained from multiplex protein detection methods, and spectrally coded beads can provide efficient means for this type of detection. In this study, we report that polydiacetylene- coated surface-enhanced Raman scattering- encoded beads (PDA-SERS beads) which can provide an encoding capacity owing to their SERS properties as well as for label-free detection from the PDA layer. We also introduced ligands to the PDA-SERS beads which enabled the detection of target proteins by PDA fluorescence. The fluorescence intensities of biotin-conjugated PDA-SERS beads were increased with an increase in the concentration of streptavidin by using PDA-SERS beads immobilized with biotin. We could detect 2 x 10-8 M of streptavidin by measuring the fluorescence intensity without an additional labeling step.
Assembled nanostructure on silica nanoparticles for bio-applications
전봉현 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
Since protein detection has been used for diagnosis of various diseases, there have been considerable interests in the development of multiplex protein detection techniques. Among the various techniques, optical encoded nanoparticles have great advantages over planar array-based multiplexing assays. Recently, we have developed several kinds of optical encoded silica nanoparticles which have metal or semi-conduct nanoparticles assembled nanostructure. The structures can be applied for label-free protein detection or for bio-imaging. Optical encoded silica nanoparticles which are suitable for multiplex detection systems will be discussed.
전봉현,김건성,정신영,노미석,Xuan-Hung Pham,강호만,조명행,김종호,이윤식,정대홍 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.3
Surface-enhanced Raman scattering (SERS) has attracted considerable interest as a sensitive vibration-specific probe for bioanalytical and imaging applications. Among the various bioprobes available, Ag-embedded SERS tags have been rigorously developed for an extensive range of biodetection applications. In this review, we look at the additional functionality that SERS tags can offer via its magnetic properties, fluorescence, and an extension of the optical region into the near-infrared (NIR) spectrum. Such functionality can be achieved by using Ag nanoparticles (NPs) or Au/Ag hollow-shells (HS) as a SERS signaling unit, with SiO2 nanospheres providing a back-bone unit. This back-bone can include a magnetic core (M-SERS dots), but also provides an outer shell that protects the optical unit and allows for easy conjugation of linkers that can include fluorescent organic dyes for an additional optical unit (F-SERS dots). In use, M-SERS dots allow for the separation of target cancer or cancer stem cells with an external magnetic field, while F-SERS dots can rapidly locate specific proteins within large areas of tissue and simultaneously analyze multiple targets based on their Raman signals. Moreover, NIR SERS dots can be detected with a high sensitivity within deep tissues, thus allowing them to be applied to in vivo multiplex detection. As none of these advanced functional SERS dots exhibit any sign of cytotoxicity for cell lines, they demonstrate a clear potential for more efficient, high-throughput screening of biological molecules using Raman technology.
脂肪食餌가 血液凝固에 미치는 實驗的硏究 : [弟1編] 脂肪食이 血液凝固에 미치는 影響
全鳳玹 中央醫學社 1961 中央醫學 Vol.1 No.2
There are diverse opinions about the effect of fat meal on blood coagulation. Waldron and et al reported that ingested fat markedly shortened clotting time, but Tulloch and Walbord denied it. In our laboratory, many workers have investigated the accelerating mechanism of blood coagulation in vivo, by giving various hemostatics, such as salts, ACTH, and Cortison. They Confirmed that the accelerating actions of hemostatics were due to increase of serum lipid, mainly cholesterol and lipid phosphorous, which were liberated from adrenal cortex by stimulant of hemostatics, however cholesterol, cortison and other steroid hormon emulsiones shortened directly blood clotting time in vivo in the adrenalectomized rabbits. From those results, it seems that lipids play an impoortant role in the acceleration of blood coagulation. Author intented to observe the effect of lipids on the blood coagulation by giving them per os, and chosen fats such as butter, egg yolk and wool fat which contain cholesterols. Materials and Methods: Albino rabbits weighing about 2 kg were used. As fat meals, butter, egg yolk and wool fat were given by rubber Catheter per os, respectively 3.5gm, an egg yolk and 2.5gm per. kg. weight. Blood was withdrawn from both juglar veins with dried syringes before and after fat meals every hour, until blood, clotting time returns to normal value. The determination of blood coagulation was done by Lee White's method, and the calculation of serum total cholesterol was by Bloor's method. As part I of this study, the determination of blood clotting time and calculation of serum total cholesterol were performed in normal rabbits before and after fat meals. The results were as follows 1) The all fat meals (butter, egg yolk, wool fat) shortened markedly the clotting time and increased the amount of total cholesterol. 2) The acceleration of blood coagulation began about one hour reached to the maximum 3-4 hours and disappeared about 7 to 8 hours after fat meals. As part 2 of this study, the same observations were performed, respectively in the RES blocked, adneralectomized and intoxicated rabbits with Ccl4, in the rabbits with external fistula of common bile duct and those with out-fistula of thoracic duct. The results were as follows: 1)The acceleration of ingested fat was confirmed in all rabbits except in the rabbits with a fistula of thoracic duct. 2) The accelerating action of ingested fat prolonged in the blocked R. E. S. and intoxicated rabbits. 3) The thoracic fluid after fat meals shortened markedly the clotting time in the normal rabbits.