β-In 2 S 3 and β-In 2 S 3 :Co 2+ single crystals were grown by the chemical transport reaction method using In 2 S 3 , S, and ZnS as starting materials and (ZnCl 2 + I 2 ) as a transport agent. The single crystals crystallized into a tetragonal structure. The indirect optical energy band gaps of the single crystals at 298 K were found to be 2.240 eV and 1.814 eV for β-In 2 S 3 and β-In 2 S 3 :Co 2+ , respectively. The direct optical energy band gaps were found to be 2.639 eV and 2.175 eV for β-In 2 S 3 and β-In 2 S 3 :Co 2+ , respectively. Impurity optical absorption peaks were observed for the β-In 2 S 3 :Co 2+ single crystal. These impurity absorption peaks were assigned, based on the crystal field theory, to the electron transitions between the energy levels of the Co 2+ ion sited in T d symmetry.

Leaf mustard (Brassica juncea), the main ingredient of leaf mustard kimchi, has a variety of biologically active secondary metabolites such as glucosinolates (GSLs), flavonoids, and polyphenols. In this study, the changes in GSL content and antioxidant properties during the storage of Dolsan leaf mustard kimchi (DLMK) for 35 days were examined by separation and purification of DLMK extracts using high‐performance liquid chromatography (HPLC) and preparative octadecylsilane‐HPLC. The total GSL content and antioxidant activity of the DLMK extracts had significantly lower values on day 21 of storage (p <.05). GSLs were detected in a single extract of DLMK using liquid chromatography‐tandem mass spectrometry. The GSLs detected throughout most of the storage period (sinigrin, gluconapin, and glucotropaeplin) were different from those detected on day 21 of storage (glucobrassicin and progoitrin), when the antioxidant activity was low. Thus, GSLs may contribute to the antioxidant activity of DLMK. Practical applications Dolsan leaf mustard kimchi (DLMK) is expected to have biological effects owing to the properties of its various ingredients, but the effects of fermentation and the overall composition of DLMK on physiological activity have not been determined. On the basis of this study, DLMK has high value as a natural antioxidant, but the antioxidant activity varies with fermentation time, which is lowest on day 21. Thus, these results can be used to establish appropriate preparation conditions for DLMK as a functional food.

Bakanae (foolish seedling) disease caused by Gibberella fujikuroi creates serious problems in the foremost rice growing countries. This study was conducted to identify new resistance genetic sources to Bakanae disease. Bioassay showed that 11 varieties including Gwangmyeongbyeo, Hawn, Wonseadaesoo, Erguailai etc. were resistant to bakanae disease among 254 rice germplasm. Mismatch ratio between phenotype on bakanae disease bioassay and allele type of RM9, a SSR marker closely linked the bakanae disease resistant QTL, qBK1, were 38.3%. These results suggest that RM9 might be used for selecting qBK1, but it cannot be used for wide range of rice germplasm. Resistant germplasm in this study might be have resistant genes different from qBK1. The eleven varieties resistant to selected in this study will be used to identify new resistant alleles or genes to improve bakanae disease resistance in rice.

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