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 Hwang & Son & Lee & He & Jo & Shin & Ghim 2020, SP. NOV.

DESCRIPTION OF NOCARDIOIDES SAMBONGENSIS SP. NOV. Nocardioides sambongensis (sam.bong.en′ sis. N.L. masc. adj. sambongensis of or pertaining to Sambong Islands. Sambong, ancient name of the Dokdo Islands, located on the coast of the East Sea in Korea, from where the organism was isolated). Cells are aerobic, Gram-stain-positive, non-motile and nonendospore-forming rods. The cells grow well under aerobic conditions on R2A agar and TSA plates. The individual cells are 0.5–0.6×0.8–1.0 µm in size. Colonies are circular, smooth, pale yellow in colour, and are approximately 1.0– 2.5 mm in diameter after 2 days of incubation on R2A agar at 30 Ǫ C. Growth occurs between 25 and 37 Ǫ C, but not at 40 Ǫ C and above. The pH range for growth is pH 5–12 (optimally at pH 7–8). Grows in the presence of 0–7% NaCl (w/ v; optimally in 0.5–2 %), but not in 8 % NaCl. The cells are catalase- and oxidase-positive. The cells hydrolyse Tween 20, Tween 40, Tween 60 and Tween 80, but not casein, DNA, hypoxanthine, starch, L- tyrosine or xanthine. Cells are positive for nitrate reduction, aesculin hydrolysis, gelatin hydrolysisand glucose fermentation, but negative for indole production, arginine dihydrolase and urease (API 20NE). D- Glucose is utilized, but adipate, L- arabinose, caproate, citrate, gluconate, N - acetyl-D- glucosamine, malate, maltose, D- mannitol, D- mannose and phenylacetate are not utilized as sole carbon and energy sources (API 20NE). API 50 CH tests are positive for acid production from aesculin, cellobiose, glucose, 5-ketogluconate, rhamnose, sucrose, trehalose, turanose and D- xylose, but negative for that from 2- ketogluconate, adonitol, amygdalin, D- arabinose, D- arabitol, L- arabinose, L- arabitol, arbutin, dulcitol, erythritol, fructose, D- fucose, L- fucose, galactose, gluconate, glycerol, glycogen, inositol, inulin, lactose, maltose, mannitol, mannose, melezitose, melibiose, methyl a- D- glucoside, methyl a- D-mannoside, methyl b- D- xyloside, N -acetylglucosamine, gentiobiose, D- lyxose, D- tagatose, L- xylose raffinose, ribose, salicin, sorbitol, sorbose, starch and xylitol (API 50 CH). Test results are positive for cystine arylamidase, esterase, b-galactosidase, a- glucosidase, b- glucuronidase, naphthol-AS-BI-phosphohydrolase, trypsin and valine arylamidase, but negative for acid phosphatase, alkaline phosphatase, a-chymotrypsin, esterase lipase, a- fructosidase, a- galactosidase, b- glucosidase, leucine arylamidase, lipase, a- mannosidase and N -acetyl-b- glucosaminidase activities (API ZYM). The predominant menaquinone is MK-8(H 4). The major fatty acids are C 18: 1 ! 9 c, iso-C 16: 0 and iso-C. The DNA G+C content is 71.7 mol%. *Data obtained from Kim et al. [54]. †Data obtained from Lim et al. [55]. ‡Data obtained from Cho et al. [56]. *Summed features represent groups of two or three fatty acids that could not be separated by GLC with the MIDI system. Summed feature 3 comprises C16: 1 ! 6 c and/or C16: 1 ! 7 c. Summed feature 6 comprises C19: 1 ! 9 c and/or C19: 1 ! 11 c. Summed feature 8 comprises C18: 1 ! 6 c and/or C18: 1 ! 7 c. 17: 0 The type strain is KUDC5002 T (= KCTC 39855 T = DSM 106604 T), which was isolated from soil collected from the Dokdo Islands, Republic of Korea. The 16S rRNA gene sequence and the whole genome sequence of strain KUDC5002 T has been deposited in GenBank / EMBL / DDBJ under the accession numbers KX858534 and CP041091. General features of the genome assembly are as follows: genome size, 4 434 294 bp; number of contigs, 1; coverage, 111.0×.Published as part of 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, pp. 16-22 in International Journal of Systematic and Evolutionary Microbiology 70 (1) on pages 18-21, DOI: 10.1099/ijsem.0.003689, http://zenodo.org/record/604865

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