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Evaluation of Commercial Complementary DNA Synthesis Kits for Detecting Human Papillomavirus
Kwangmin Yu,Sunyoung Park,Yunhee Chang,Dasom Hwang,Geehyuk Kim,Jungho Kim,Sunghyun Kim,김은중,Dongsup Lee 대한임상검사과학회 2019 대한임상검사과학회지(KJCLS) Vol.51 No.3
Cervical cancer is the fourth most common malignant neoplasm in women worldwide. Most cases of cervical cancer are caused by an infection by the human papillomavirus. Molecular diagnostic methods have emerged to detect the HPV for sensitivity, specificity, and objectivity. In particular, real-time PCR has been introduced to acquire a more sensitive target DNA or RNA. RNA extraction and complementary DNA synthesis are proceeded before performing real-time PCR targeting RNA. To identify an adequate and sensitive cDNA synthesis kit, this study evaluated the two commonly used kits for cDNA synthesis. The results show that the R2 and efficiency (%) of the two cDNA synthesis kits were similar in the cervical cancer cell lines. On the other hand, the Takara kit compared to Invitrogen kit showed P<0.001 in the 102 and 103 SiHa cell count. The Takara kit compared to the Invitrogen kit showed P<0.001 in the 101 and 102 HeLa cell count. Furthermore, 8, 4, 2, 1, and 0.5 ml of forty exfoliated cell samples were used to compare the cDNA synthesis kits. The Takara kit compared to the Invitrogen kit showed P<0.01 in 8, 4, and 1 ml and P<0.05 in 0.5 mL. The study was performed to identify the most appropriate cDNA synthesis kit and suggests that a cDNA synthesis kit could affect the real-time PCR results. Cervical cancer is the fourth most common malignant neoplasm in women worldwide. Most cases of cervical cancer are caused by an infection by the human papillomavirus. Molecular diagnostic methods have emerged to detect the HPV for sensitivity, specificity, and objectivity. In particular, real-time PCR has been introduced to acquire a more sensitive target DNA or RNA. RNA extraction and complementary DNA synthesis are proceeded before performing real-time PCR targeting RNA. To identify an adequate and sensitive cDNA synthesis kit, this study evaluated the two commonly used kits for cDNA synthesis. The results show that the R2 and efficiency (%) of the two cDNA synthesis kits were similar in the cervical cancer cell lines. On the other hand, the Takara kit compared to Invitrogen kit showed P<0.001 in the 102 and 103 SiHa cell count. The Takara kit compared to the Invitrogen kit showed P<0.001 in the 101 and 102 HeLa cell count. Furthermore, 8, 4, 2, 1, and 0.5 ml of forty exfoliated cell samples were used to compare the cDNA synthesis kits. The Takara kit compared to the Invitrogen kit showed P<0.01 in 8, 4, and 1 ml and P<0.05 in 0.5 mL. The study was performed to identify the most appropriate cDNA synthesis kit and suggests that a cDNA synthesis kit could affect the real-time PCR results.
Analysis of Operational Loss Characteristics of 10 kJ Class Toroid-Type SMES
Kwangmin Kim,A-Rong Kim,Jin-Geun Kim,Minwon Park,In-Keun Yu,Myung-Hwan Sohn,Bum-Yong Eom,Kidoek Sim,Seokho Kim,Hae-Jong Kim,Joon-Han Bae,Ki-Chul Seong IEEE 2011 IEEE transactions on applied superconductivity Vol.21 No.3
<P>This paper describes the design results, loss analysis, and experiment testing of the real manufactured toroid-type superconducting magnetic energy storage (SMES). We analysed heat load through the conduction and radiation of the cryostat and magnetization loss caused by the charging and discharging of the toroid-type SMES system. We also measured the characteristics of toroid-type SMES under three different types of operating conditions (steady state, one-cycle charging and discharging, series charging and discharging). The fundamental design specifications and the data obtained from the experiment will be applied to a large-scale toroid-type SMES system design.</P>
Design of a 400 mH 400 A Toroid-Type HTS DC Reactor Magnet
Kwangmin Kim,Jin-Geun Kim,Hwanjun Jung,Seokho Kim,Sangjin Lee,Minwon Park,In-Keun Yu IEEE 2013 IEEE transactions on applied superconductivity Vol.23 No.3
<P>Large electric power systems, such as high voltage direct current (HVDC) transmission systems, need dc reactors with large inductance and high transport current. Such systems experience a lot of electrical loss due to the resistance of their copper winding. Employing superconducting magnets for the reactors provides some advantages such as high current density, low electrical loss, and so on. This paper describes the design of a toroid-type high temperature superconductor (HTS) dc reactor magnet. The target inductance and the current level of the HTS dc reactor were 400 mH and 400 A, respectively. The toroid-type HTS magnet reduced leakage flux and increased the critical current of the reactors. The HTS dc reactors were designed using 2G HTS wires. The Finite Element Method was used for the design and analysis of the toroid-type HTS dc reactors.</P>
Stress analysis of HTS racetrack coils for 10 MW class superconducting wind power generator
Kwangmin Kim(김광민),Gyeong-Hun Kim(김경훈),Minwon Park(박민원),In-Keun Yu(유인근) 한국산업정보학회 2013 한국산업정보학회논문지 Vol.18 No.2
The authors designed a high temperature superconductor (HTS) racetrack coil for a 10 MW class superconducting synchronous wind turbine generator. The designed HTS racetrack coil was analyzed by an electromagnetic finite element method (FEM) to determine the magnetic field distribution, inductance, stress, etc. This paper describes the stress analysis and structure design result of the HTS racetrack coil for 10 MW class superconducting synchronous wind turbine generators, considering orthotropic material properties, a large magnetic field, and the resulting Lorentz force effect. Insulated HTS racetrack coils and no-insulation HTS racetrack coils were also considered. According to the results of the stress analysis, the no-insulation HTS racetrack coil results were better than the insulated HTS racetrack coil results.
Operating Characteristics of an Insulationless HTS Magnet Under the Conduction Cooling Condition
Kwangmin Kim,Sung-Jun Jung,Hae-Jin Sung,Gyeong-Hun Kim,Seokho Kim,Sangjin Lee,A-Rong Kim,Minwon Park,In-Keun Yu IEEE 2013 IEEE transactions on applied superconductivity Vol.23 No.3
<P>This paper considers the insulationless high-temperature superconducting (HTS) magnet as a new and innovative concept for dc applications due to its benefits as compared to conventional HTS magnets with insulation layers between HTS conductors. The purpose of this paper is to study the operating characteristics of an insulationless HTS magnet. The normal operating characteristics of the insulationless HTS magnet were investigated according to the various current levels. Thermal stability of the insulationless HTS magnet was also analyzed. The critical current of the insulationless HTS magnet was measured at 40 K. The temperature distribution of the insulationless HTS magnet was measured using thermocouples. The experiment results demonstrate superior thermal stability characteristics in the insulationless HTS magnet. Thus, it is confirmed that the thermal performance of large-scale HTS magnets can be enhanced by applying insulationless magnets instead of general insulated HTS magnets.</P>
Cho, Kwangmin,Jang, You-Jin,Lee, Se-Jong,Jeon, Yu-Na,Shim, Young-Lim,Lee, Ji-Yong,Lim, Da-Som,Kim, Dong-Hou,Yoon, Seung-Yong Elsevier 2020 Biochemical and biophysical research communication Vol.524 No.3
<P><B>Abstract</B></P> <P>β-Amyloid (Aβ) plaque in the brains of patients with Alzheimer’s disease (AD) is mainly caused by impaired clearance of Aβ by glial cells, including microglia and astrocytes. Because microglia play an important protective role in the central nervous system, many efforts have been made to identify agents that effectively improve microglial Aβ phagocytosis. This study found that TLQP-21, which is cleaved from VGF (VGF nerve growth factor inducible) precursor protein, enhanced Aβ phagocytosis and degradation by microglial BV2 cells. TLQP-21 also improved microglial phagocytic activity and promoted fibrillar amyloid-β (fAβ) uptake by microglial BV2 cells via a C3AR1-dependent mechanism. Moreover, TLQP-21 stimulated Aβ degradation by enhancing lysosome activity, thereby enhancing fAβ clearance. These results suggest that treatment with TLQP-21 may be a novel therapeutic strategy to efficiently enhance microglial Aβ clearance in AD.</P> <P><B>Highlights</B></P> <P> <UL> <LI> TLQP-21 increases extracellular fAβ uptake by microglial BV2 cells. </LI> <LI> TLQP-21 enhances phagocytic activity of microglial BV2 cells. </LI> <LI> TLQP-21 increases fAβ uptake by microglial BV2 cells via C3AR1-dependent mechanisms. </LI> <LI> TLQP-21 enhances the degradation of engulfed Aβ by stimulating a lysosomal degradation pathway. </LI> </UL> </P>
Design and Performance Analysis of a NI-Type HTS Field Magnet for Superconducting Rotating Machines
Kim, Kwangmin,Go, Byeong-Soo,Park, Minwon,Yu, In-Keun Institute of Electrical and Electronics Engineers 2015 IEEE transactions on applied superconductivity Vol.25 No.3
<P>The no-insulation-type (NI-type) high-temperature superconductor (HTS) magnet is considered a new and innovative concept for superconducting rotating machines, and it is possible to make an electrically and thermally robust magnet. The purpose of this paper is to investigate the NI-type HTS field magnet performance for superconducting rotating machines. First, specification data for a superconducting rotating machine were acquired based on electromagnetic analysis. Based on the data, the wire type, coil shape, field magnet, and armature were designed. The detailed structure of the NI-type HTS field magnet was designed using a 3-D CAD program. The performance of the NI-type HTS field magnet was tested under charge–discharge and overcurrent conditions. The NI-type HTS field magnet proposed in this paper operated well. Based on the field magnet data, an NI-type HTS field magnet-based superconducting rotating machine was fabricated. The signal condition and generating power of the fabricated HTS rotating machine were examined.</P>