Springer Science and Business Media LLC Acta Medica Okayama 0003-6072 118 10 2025 Duganella hordei sp. nov., Duganella caerulea sp. nov., and Duganella rhizosphaerae sp. nov., isolated from barley rhizosphere 146 EN Katsumoto Kishiro Institute of Plant Science and Resources, Okayama University Nurettin Sahin Egitim Fakultesi, Mugla Sitki Kocman University Daisuke Saisho Institute of Plant Science and Resources, Okayama University Naoki Yamaji Institute of Plant Science and Resources, Okayama University Jun Yamashita Institute of Plant Science and Resources, Okayama University Yuki Monden Graduate School of Environmental, Life, Natural Science and Technology, Okayama University Tomoyuki Nakagawa Faculty of Applied Biological Sciences, Gifu University Keiichi Mochida RIKEN Center for Sustainable Resource Science Akio Tani Institute of Plant Science and Resources, Okayama University Duganella sp. strains R1T, R57T, and R64T, isolated from barley roots in Japan, are Gram-stain-negative, motile, rod-shaped bacteria. Duganella species abundantly colonized barley roots. Strains R1T, R57T, and R64T were capable of growth at 4 °C, suggesting adaptation to colonize winter barley roots. Strains R57T and R64T formed purple colonies, indicating violacein production, while strain R1T did not. Based on 16S rRNA gene sequence similarities, strains R1T, R57T, and R64T were most closely related to D. violaceipulchra HSC-15S17T (99.10%), D. vulcania FT81WT (99.45%), and D. violaceipulchra HSC-15S17T (99.86%), respectively. Their genome sizes ranged from 7.05 to 7.38 Mbp, and their genomic G+C contents were 64.2–64.7%. The average nucleotide identity and digital DNA–DNA hybridization values between R1T and D. violaceipulchra HSC-15S17T, R57T and D. vulcania FT81WT, R64T and D. violaceipulchra HSC-15S17T were 86.0% and 33.2%, 95.7% and 67.9%, and 92.7% and 52.6%, respectively. Their fatty acids were predominantly composed of C16:0, C17:0 cyclo, and summed feature 3 (C16:1 ω7c and/or C16:1 ω6c). Based on their distinct genetic and phenotypic characteristics, and supported by chemotaxonomic analyses, we propose that strains R1T, R57T, and R64T represent novel species within the Duganella genus, for which the names Duganella hordei (type strain R1T = NBRC 115982 T = DSM 115069 T), Duganella caerulea (type strain R57T = NBRC 115983 T = DSM 115070 T), and Duganella rhizosphaerae (type strain R64T = NBRC 115984 T = DSM 115071 T) are proposed. No potential conflict of interest relevant to this article was reported.

Group of Wild Plant Science, Institute of Plant Science and Resources, Okayama University Acta Medica Okayama 2021 Naturalized plants in Japan : Seed-Image database EN Jun Yamashita Institute of Plant Science and Resources, Okayama University /10.48696/63011 Naturalized Plants in Japan Seed-Image database is an image database of naturalized alien plant seeds recorded in Japan. This database contains plant images, information on morphological features of seeds and the name list of naturalized alien plants, as well as seed images. Seeds are categorized into 5 groups based on morphological features such as reticulation (wrinkles or projections), ridges, edges and achene fruit. Users can search seed images by family names, species names and those features. No potential conflict of interest relevant to this article was reported.

American Chemical Society (ACS) Acta Medica Okayama 1523-7060 23 8 2021 Electrosynthesis of Phosphacycles via Dehydrogenative C–P Bond Formation Using DABCO as a Mediator 3120 3124 EN Yuji Kurimoto Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University Jun Yamashita Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University Koichi Mitsudo Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University Eisuke Sato Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University Seiji Suga Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University The first electrochemical synthesis of diarylphosphole oxides (DPOs) was achieved under mild conditions. The practical protocol employs commercially available and inexpensive DABCO as a hydrogen atom transfer (HAT) mediator, leading to various DPOs in moderate to good yields. This procedure can also be applied to the synthesis of six-membered phosphacycles, such as phenophosphazine derivatives. Mechanistic studies suggested that the reaction proceeds via an electro-generated phosphinyl radical. No potential conflict of interest relevant to this article was reported.

Springer Netherlands Acta Medica Okayama 0236-5731 2015 Adsorption and removal of strontium in aqueous solution by synthetic hydroxyapatite EN Yuichi Nishiyama Tadashi Hanafusa Jun Yamashita Yoko Yamamoto Toshiro Ono Hydroxyapatite (HAP) is a main mineral constituent of bone and tooth and has an outstanding biocompatibility. HAP is a possible sorbent for heavy metals in wastewater due to its high adsorption capacity and low water solubility. We developed a removal system of 90Sr from aqueous solution by HAP column procedure. More than 90 % of 90Sr was adsorbed and removed from the 90Sr containing solution. Divalent cations, Ca2+, had little effect on the removal of 90Sr up to a concentration of 1 mmol L−1. This clearly indicates that the HAP column technique is advantageous with respect to the capacity to adsorb 90Sr from water present in the environment. No potential conflict of interest relevant to this article was reported.