Small anisotropy of the lower critical field and s±s_\pm-wave two-gap feature in single crystal LiFeAs

The in- and out-of-plane lower critical fields and magnetic penetration depths for LiFeAs were examined. The anisotropy ratio $\gamma_{H_{c1}}(0)$ is smaller than the expected theoretical value, and increased slightly with increasing temperature from 0.6$T_c$ to $T_c$. This small degree of anisotropy was numerically confirmed by considering electron correlation effect. The temperature dependence of the penetration depths followed a power law($\sim$$T^n$) below 0.3$T_c$, with $n$$>$3.5 for both $\lambda_{ab}$ and $\lambda_c$. Based on theoretical studies of iron-based superconductors, these results suggest that the superconductivity of LiFeAs can be represented by an extended $s_\pm$-wave due to weak impurity scattering effect. And the magnitudes of the two gaps were also evaluted by fitting the superfluid density for both the in- and out-of-plane to the two-gap model. The estimated values for the two gaps are consistent with the results of angle resolved photoemission spectroscopy and specific heat experiments.Comment: 10 pages, 5 figure

Nocardioides sambongensis sp. nov., isolated from Dokdo Islands soil

Hwang, Ye-Ji, Son, Jin-Soo, Lee, Soo-Yeong, He, Yuxi, Jo, YoungJae, Shin, Jae-Ho, Ghim, Sa-Youl (2020): Nocardioides sambongensis sp. nov., isolated from Dokdo Islands soil. International Journal of Systematic and Evolutionary Microbiology 70 (1): 16-22, DOI: 10.1099/ijsem.0.003689, URL: http://dx.doi.org/10.1099/ijsem.0.00368

Synthesis of a new cross-linkable perfluorocyclobutane-based hole-transport material

A new curable arylamine containing a perfluorocyclobutane (PFCB) structure without an acidic group was synthesized. The material was thermally cured on ITO after spin-coating. The polymer showed excellent solvent resistance, high thermal stability, high transparency, and good surface smoothness.close465

Recombinant urate oxidase (Rasburicase) for the treatment of hyperuricemia in pediatric patients with hematologic malignancies: Results of a compassionate prospective multicenter study in Korea

BACKGROUND: Hyperuricemia accompanying tumor lysis syndrome is a serious complication in neoplasia with rapid proliferation and destruction. To confirm the efficacy of recombinant urate oxidase (rasburicase) and its safety profile, a phase IV compassionate use prospective study was performed in Korean pediatric patients with hematologic malignancies. PROCEDURE: Rasburicase was administered at 0.2 mg/kg/day once daily for 3-5 days (twice daily allowed during the first 72 hr) by intravenous route for hyperuricemia (uric acid > 7.5 mg/dl). The study period was 5 weeks and consisted of a baseline assessment within 48 hr before the administration of rasburicase, 3-5 days of assessment during treatment and a follow-up assessment at 4 weeks after its final administration. RESULTS: The uric acid endpoint (< or =7.0 mg/dl) was reached in 97.3% (36/37) of the patients and uric acid levels were significantly reduced in all patients (P < 0.001). Drug related toxicities were mild and reversible without any grade 4 or serious adverse event associated with rasburicase. CONCLUSION: This study confirms that rasburicase is a safe and effective agent for the treatment of hyperuricemia associated with hematologic malignancies in pediatric patients

Progress of the KSTAR Research Program Exploring the Advanced High Performance and Steady-State Plasma Operations

Korea Superconducting Tokamak Advanced Research (KSTAR) program is strongly focused on solving the scientific and technological issues in steady-state high performance plasma operation in preparation for ITER operation as well as the design basis for DEMO. In this regards, KSTAR has made significant advances in developing long pulse and high performance plasma scenarios utilizing the advantage of the fully superconducting tokamak. Ten-year of KSTAR operation showed the outstanding progress in the plasma control extending the operation window of the plasma discharges achieving the H-mode up to 1 MA in plasma current, up to 72 s in flat top duration, and up to 2.16 in elongation. In addition to the long pulse discharge, high performance discharges with high betas ((N) 3) could be achieved in the broad range of edge safety factor (q95) without external error field correction. The unique features of the KSTAR device (magnetic accuracy with extremely low error fields, steady-state capable heating systems, in-vessel control coils, and advanced imaging and profile diagnostics) has been fully exploited to explore the unveiled physics as well as to exploring the systematic solution for suppression of edge localized mode (ELM) crash. Achieved examples are the record long pulse of H-mode operation without an ELM crash ( 30 s up to date), and progress in the fundamental transport physics through systematic study using these unique capabilities. Based on the previous research results, intensive research will be followed to explore the advanced high beta operation ((N) 4) with fully suppressed harmful MHD instabilities aiming the integrated solution for DEMO. In this regards, an additional current drive systems and in-vessel structures will be upgraded