Narrow-Band SrMgAlO:Eu, Mn Green Phosphors for Wide-Color-Gamut Backlight for LCD Displays.

The strength of the photoluminescence excitation (PLE) spectrum of SrMgAlO:Eu, Mn (SAM:Eu, Mn) phosphor increased at deep blue (∼430 nm) and red-shifted from violet to deep blue with increasing concentrations of both Eu ions Mn ions. Eu-Mn energy transfer between Eu ions in Sr-O layer and Mn ions at Al-O tetrahedral sites was maximized, and the photoluminescence (PL) intensity of the narrow-band Mn emission was improved by optimizing the concentrations of Eu and Mn ions. The PL emission spectrum of the (SrEu)(MgMn)AlO (SAM:Eu, Mn) phosphor peaks was optimized at 518 nm at a full width at half-maximum (FWHM) of 26 nm under light-emitting diode (LED) excitation at 432 nm LED.

Design of highly efficient phosphor-converted white light-emitting diodes with color rendering indices (R - R) ≥ 95 for artificial lighting.

Phosphor-converted white light-emitting diodes (pc-WLEDs) are excellent energy-efficient light sources for artificial lighting applications. One goal of artificial lighting is to make objects/images look natural - as they look under the sunlight. The ability of a light source to accurately render the natural color of an object is gauged by the parameter - color rendering index (CRI).

Photoconversion Mechanisms and the Origin of Second-Harmonic Generation in Metal Iodates with Wide Transparency, NaLn(IO) (Ln = La, Ce, Sm, and Eu) and NaLa(IO):Ln (Ln = Sm and Eu).

Four new metal iodates, namely, NaLn(IO) (Ln = La, Ce, Sm, and Eu), and a series of NaLa(IO):Ln (Ln = Sm and Eu) solid solutions were synthesized through hydrothermal reactions. The structures of the title compounds are similar to that of NaY(IO) crystallizing in the acentric monoclinic space group Cc. The iodate materials reveal layered structures composed of LnO square antiprisms and IO polyhedra, in which each layer is connected by the I···O interactions.

Reduced graphene oxide enwrapped phosphors for long-term thermally stable phosphor converted white light emitting diodes.

The long-term instability of the presently available best commercial phosphor-converted light-emitting diodes (pcLEDs) is the most serious obstacle for the realization of low-cost and energy-saving lighting applications. Emission from pcLEDs starts to degrade after approximately 200 h of operation because of thermal degradation of the phosphors. We propose a new strategy to overcome this thermal degradation problem of phosphors by wrapping the phosphor particles with reduced graphene oxide (rGO).

An online questionnaire survey on preferred timing for the diagnosis and management of thyroid carcinoma in general population in Korea.

Purpose: An optimal timing for diagnosis and management of papillary thyroid microcarcinoma (PTMC) has become the subject for much controversy. The aim of the present study is to analyze people's preference in Korea for timing of diagnosis and management of PTMC using an online questionnaire.

Methods: The questionnaire consists of 3 questions about preference for the diagnosis and management of PTMC and 3 additional questions about respondents' personal information.

Flavobacterium chungbukense sp. nov., isolated from soil.

A yellow-pigmented, Gram-staining-negative, non-motile, strictly aerobic and rod-shaped bacterium, designated CS100(T), was isolated from soil in Chungbuk, Korea. Phylogenetic analysis and comparative studies based on the 16S rRNA gene sequence showed that strain CS100(T) belonged to the genus Flavobacterium in the family Flavobacteriaceae. Strain CS100(T) showed the highest sequence similarities to Flavobacterium glaciei JCM 13953(T) (97.

Reichenbachiella faecimaris sp. nov., isolated from a tidal flat, and emended descriptions of the genus Reichenbachiella and Reichenbachiella agariperforans.

A taxonomic study was carried out on two bacterial strains, PCP11(T) and PCP104, isolated from a tidal flat of the Yellow Sea, Korea. Comparative 16S rRNA gene sequence studies showed that these strains belonged to the family Cytophagaceae, phylum Bacteroidetes. Strains PCP11(T) and PCP104 shared 99.

Pseudoalteromonas donghaensis sp. nov., isolated from seawater.

A Gram-negative, rod-shaped, motile and aerobic bacterium, designated strain HJ51(T), was isolated from a seawater sample from the East Sea, near South Korea. The isolate grew slowly at 4 °C, was able to grow at 40 °C, required NaCl and grew optimally at pH 6.5-7.

Roseovarius halotolerans sp. nov., isolated from deep seawater.

A Gram-reaction-negative, non-motile, aerobic bacterium, designated HJ50(T), was isolated from deep seawater of the East Sea, South Korea. Cells were ovoid to rod-shaped (0.5-0.

Paenibacillus donghaensis sp. nov., a xylan-degrading and nitrogen-fixing bacterium isolated from East Sea sediment.

A Gram-positive and endospore-forming strain, JH8T, was isolated from deep-sea sediment and identified as a member of the genus Paenibacillus on the basis of 16S rRNA gene sequence and phenotypic analyses. According to a phylogenetic analysis, the most closely related species was Paenibacillus wynnii LMG 22176T (96.9%).

Planococcus donghaensis sp. nov., a starch-degrading bacterium isolated from the East Sea, South Korea.

A novel Gram-positive, aerobic bacterium, strain JH1T, was isolated from deep-sea sediment of the East Sea, South Korea, and identified by methods of polyphasic taxonomy. The strain was oxidase-positive, motile and coccus-shaped. The genomic DNA G+C content of strain JH1T was 47 mol%.