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( Edward Gane ),( Amoreena C Corsa ),( Yang Liu ),( Ben C Mitchell2 ),( John F Flaherty ),( Michael D Miller ),( Kathryn M Kitrinos ),( Scott Fung ) 대한간학회 2013 춘·추계 학술대회 (KASL) Vol.2013 No.1
Background/Aim: To evaluate amino acid changes within HBV pol/RT after 96 weeks of treatment with TDF or FTC/ TDF and determine their potential association with TDF resistance. Methods: In Study GS-US-174-0121, 280 patients receiving lamivudine (LAM) with detectable LAM-resistance mutations in HBV pol/RT (LAM-R: rtM204V/I±rtL180M) were randomized 1:1 to receive blinded treatment with TDF or FTC/TDF for 96 weeks. Virologic breakthrough (VB) was defined as confirmed HBV DNA >1 log10 increase from nadir or HBV DNA ≥400 copies/mL (69 IU/mL) after <400 copies/mL. Resistance genotyping by HBV pol/RT sequencing was attempted for all patients at baseline and if viremic (HBV DNA ≥400 copies/ mL) at Week 96/study discontinuation. Results: Overall, 18 patients (9 TDF, 9 FTC/TDF) were viremic viremic at Week 96/last visit. The mean baseline HBV DNA was significantly higher for viremic patients (8.04 log10 copies/mL) compared to patients who did not qualify for genotyping (6.39 log10 copies/mL). In the TDF arm, 3 patients had conserved site changes/reversions (1 with VB), 1 had unique polymorphic site changes, 2 had no change, and 3 were unable to be genotyped. In the FTC/TDF arm, 2 patients had conserved site changes/reversions, 1 had unique polymorphic site changes, 4 had no change, and 2 were unable to be genotyped. No phenotypic resistance to TDF was observed. Four of eight (50%) patients had LAM-R reversions (rtV/I204M±rtM180L) on TDF while 1/8 (12.5%) patients on FTC/TDF had LAM-R reversions. Thirteen patients (4.6%) with prior entecavir (ETV) exposure and 25 patients (8.9%) with baseline ETV-R were enrolled; neither had an impact on viral kinetics. Conclusions: No TDF resistance has been detected through 96 weeks of treatment with either TDF or FTC/TDF in LAM-R patients. The presence of ETV-R or ETV exposure did not impact viral kinetics through 96 weeks. Resistance surveillance in this population will continue through Year 5.
CORIUM COOLABILITY UNDER EX-VESSEL ACCIDENT CONDITIONS FOR LWRs
MITCHELL T. FARMER,DENNIS J. KILSDONK,ROBERT W. AESCHLIMANN 한국원자력학회 2009 Nuclear Engineering and Technology Vol.41 No.5
In the wake of the Three Mile Island accident, vigorous research efforts were initiated to acquire a basic knowledge of the progression and consequences of accidents that involve a substantial degree of core degradation and melting. The primary emphasis of this research was placed on containment integrity, with: i) hydrogen combustion-detonation, ii) steam explosion, iii) direct containment heating (DCH), and iv) melt attack on the BWR Mark-I containment shell identified as energetic processes that could lead to early containment failure (i.e., within the first 24 hours of the accident). Should the core melt fail the reactor vessel, then non-condensable gas production from Molten Core-Concrete Interaction (MCCI) was identified as a mechanism that could fail the containment by pressurization over the long term. One signification question that arose as part of this investigation was the effectiveness of water in terminating an MCCI by flooding the interacting masses from above, thereby quenching the molten core debris and rendering it permanently coolable. Successful quenching of the core melt would prevent basemat melt through, as well as continued containment pressurization by non-condensable gas production, and so the accident progression would be successfully terminated without release of radioactivity to the environment. Based on these potential merits, ex-vessel corium coolability has been the focus of extensive research over the last 20 years as a potential accident management strategy for current plants. In addition, outcomes from this research have impacted the accident management strategies for the Gen III+ LWR plant designs that are currently being deployed around the world. This paper provides: i) an historical overview of corium coolability research, ii) summarizes the current status of research in this area, and iii) highlights trends in severe accident management strategies that have evolved based on the findings from this work.
Acute kidney injury in the patient with cancer
Mitchell H. Rosner,Mark A. Perazella 대한신장학회 2019 Kidney Research and Clinical Practice Vol.38 No.3
Dramatic advances in the care of patients with cancer have led to significant improvement in outcomes and survival. However, renal manifestations of the underlying cancer as well as the effects of anti-neoplastic therapies leave patients with significant morbidity and chronic kidney disease risks. The most common renal manifestations associated with cancer include acute kidney injury (AKI) in the setting of multiple myeloma, tumor lysis syndrome, post-hematopoietic stem cell therapy, and AKI associated with chemotherapy. Knowledge of specific risk factors, modification of risk and careful attention to rapid AKI diagnosis are critical for improving outcomes.
Mitchell Wendt,허강준 한국실험동물학회 2016 Laboratory Animal Research Vol.32 No.4
Our research sought to characterize the phylogeny of Pseudomonas aeruginosa isolated from pet Chinese stripe-necked turtles (Ocadia sinensis) to better understand its evolutionary relation to other isolates and increase understanding of a potential zoonotic pathogen transmitted through direct contact with pet turtles. Thirty-one Pseudomonas aeruginosa isolates were obtained from both immature and adult turtles sold in pet shops in Korea. To characterize the phylogenic position of Chinese stripe-necked turtle-borne P. aeruginosa relative to other strains, multilocus sequence typing (MLST) analysis was performed due to the accessibility and breadth of MLST databases. Seven housekeeping genes (acsA, aroE, guaA, mutL, nuoD, ppsA, and trpE) were sequenced and the results were compared with data from the MLST database. The genes were further used for phylogenetic analysis of P. aeruginosa using concatenated gene fragments. Both rooted and unrooted phylogenetic trees were generated. Eleven distinct sequence types were present within the isolates among which seven were new. Expanding an unrooted phylogenetic tree to include P. aeruginosa MLST sequences isolated from various other geographic locations and sources revealed a divergent cluster containing the majority of isolates obtained from turtles. This suggests that P. aeruginosa strains particularly well-adapted for inhabiting turtles occupy a distinct phylogenetic position.
Gas flows in the circumgalactic medium around simulated high-redshift galaxies
Mitchell, Peter D,Blaizot, Jé,ré,my,Devriendt, Julien,Kimm, Taysun,Michel-Dansac, Lé,o,Rosdahl, Joakim,Slyz, Adrianne Blackwell Publishing Ltd 2018 MONTHLY NOTICES- ROYAL ASTRONOMICAL SOCIETY Vol.474 No.4
The Domestic Origins of the Second Korean War: New Evidence from Communist Bloc Archives
( Mitchell Lerner ) 서울대학교 규장각한국학연구원 2018 Seoul journal of Korean studies Vol.31 No.1
In the late 1960s, the Korean Peninsula suddenly exploded with a violence not seen since the end of the Korean War, driven by a sudden wave of North Korea aggression that culminated in January 1968 with the attempted assassination of Park Chung Hee and the capture of the USS Pueblo. For decades, scholars have struggled to understand this crisis, as they lacked access to materials that could open a window into DPRK policy. Only now, with the recent release of new materials collected from the archives of the Communist bloc nations, can we begin to understand the critical events of the Second Korean War and the larger environment that surrounded it. This paper integrates the most recent materials from former Communist bloc states to revisit our understanding of this dangerous situation, and to suggest that it was driven above all else by domestic political and economic circumstances inside North Korea.
Identifying with the L2 Self : Study Abroad Experiences of Japanese English Language Learners
Mitchell Fryer,Peter Roger 아시아영어교육학회 2017 The Journal of Asia TEFL Vol.14 No.3
A possible self is a combination of the self knowledge, thoughts and beliefs that we have regarding our future potential (Markus & Nurius, 1986). This study investigated the possible selves of eight Japanese niversity study abroad (SA) students. Dörnyei (2005) posited the L2 motivational self-system, comprised of the L2 ideal self as a construct for better understanding and predicting L2 motivation. Several studies and theoretical accounts indicate that discrepancies between current and ideal states can help predict motivation, as the possible self acts as a future self-guide (Dörnyei & Chan, 2013; Higgins, 1987; Ushioda & Dörnyei, 2012). The study identified several key contextual elements that contributed to changes in the participants’ L2 motivational self systems. These included ‘thrown in the deep end’ type interactions, good timing of interactions, conscious moves by the conversation partner to assist the participants, relaxed and positive atmosphere, opportunities to initiate and sustain interactions and one on one interactions that were in line with the participants’ own cultural identity. The findings suggest the contextual elements shaped the participants’ L2 ideal and feared self images and contributed to the identification of discrepancies between current and desired states which influenced study behaviours, goals and motivation over time.