A5042493126- Microbial Community Ecology and Physiology
- Methane Hydrates and Related Phenomena
- Genomics and Phylogenetic Studies
- Wastewater Treatment and Nitrogen Removal
- Anaerobic Digestion and Biogas Production
- Microplastics and Plastic Pollution
- Vibrio bacteria research studies
- Nanomaterials for catalytic reactions
- biodegradable polymer synthesis and properties
- Phosphorus and nutrient management
- Legume Nitrogen Fixing Symbiosis
- Isotope Analysis in Ecology
- Recycling and Waste Management Techniques
- Aquatic Ecosystems and Phytoplankton Dynamics
- Advanced oxidation water treatment
- Effects and risks of endocrine disrupting chemicals
- Water Treatment and Disinfection
- Microbial Fuel Cells and Bioremediation
- Microbial bioremediation and biosurfactants
- Hemoglobin structure and function
Okayama University
1983-2024
National Institute of Advanced Industrial Science and Technology
2022-2024
Japan Agency for Marine-Earth Science and Technology
2016-2020
Nagaoka University of Technology
2014-2019
Nagaoka University
2014-2018
Osaka University
1983
The origin of eukaryotes remains unclear1–4. Current data suggest that may have emerged from an archaeal lineage known as 'Asgard' archaea5,6. Despite the eukaryote-like genomic features are found in these archaea, evolutionary transition archaea to unclear, owing lack cultured representatives and corresponding physiological insights. Here we report decade-long isolation Asgard archaeon related Lokiarchaeota deep marine sediment. archaeon—'Candidatus Prometheoarchaeum syntrophicum' strain...
Abstract The origin of eukaryotes remains enigmatic. Current data suggests that may have risen from an archaeal lineage known as “Asgard archaea”. Despite the eukaryote-like genomic features found in these archaea, evolutionary transition archaea to unclear due lack cultured representatives and corresponding physiological insight. Here we report decade-long isolation a Lokiarchaeota-related Asgard archaeon deep marine sediment. archaeon, “ Candidatus Prometheoarchaeum syntrophicum strain...
A novel slow-growing, facultatively anaerobic, filamentous bacterium, strain MO-CFX2 T , was isolated from a methanogenic microbial community in continuous-flow bioreactor that established subseafloor sediment collected off the Shimokita Peninsula of Japan. Cells were multicellular filamentous, non-motile and Gram-stain-negative. The filaments generally more than 20 µm (up to approximately 200 µm) long 0.5–0.6 wide. possessed pili-like structures on cell surface multilayer structure...
Ammonia oxidation regulates the balance of reduced and oxidized nitrogen pools in nature. Although ammonia-oxidizing archaea have been recently recognized to often outnumber bacteria various environments, contribution is still uncertain due difficulties situ quantification ammonia activity. Nitrogen oxygen isotope ratios nitrite (δ(15)NNO2- δ(18)ONO2-, respectively) are geochemical tracers for evaluating sources rate turnover determined from activities nitrification denitrification; however,...
A novel anaerobic, thermophilic bacterium of the class Atribacteria, strain M15T, was isolated from a high-temperature gas reservoir, Japan. Cells M15T were gram-negative, short oval-shaped, and lacked flagella. Growth occurred at 45–75 °C (optimum 70–75 °C) pH 6.5–8.5 7.5–8.0) fast under optimal conditions (doubling time 11.4 h). Yeast extract required for growth. Fermentative growth with glucose, arabinose, xylose, cellobiose observed. The major fermentative end products glucose acetate...
Journal Article Failure of Antisera to Thermostable Direct Hemolysin and Cholera Enterotoxin Prevent Accumulation Fluid Caused by Vibrio parahaemolyticus Get access Takeshi Honda, Honda Osaka University, Osaka, Okayama Okayama, Japan Search for other works this author on: Oxford Academic PubMed Google Scholar Yoshifumi Takeda, Takeda Toshio Miwatani, Miwatani Noriko Nakahara The Infectious Diseases, Volume 147, Issue 4, April 1983, Page 779, https://doi.org/10.1093/infdis/147.4.779 Published: 01 1983
The anaerobic–anoxic sequence batch reactor (A2SBR) was applied to achieve nitrogen and phosphorus removal in an energy-saving sewage treatment system involving up-flow anaerobic sludge blanket combined with a down-flow hanging sponge treat municipal sewage. After acclimation, the A2SBR showed satisfactory denitrification performance total phosphate nitrate concentrations of effluent 8.4 ± 3.4 mg-N L–1 0.9 0.6 mg-P L–1, respectively. 16S rRNA gene fluorescence situ hybridization analyses...
Microplastics (MPs) formed after changes in chemical or physical properties may alter soil properties, which turn affect microbial activities and greenhouse gas (GHG) emissions. However, few studies have focused on the effects of aged MPs Therefore, we aimed to investigate impact with different aging times GHG emissions dissolved organic carbon (DOC). Low-density polyethylene (PE) polylactic acid (PLA) were treated ultraviolet (UV) irradiation for 0–2 weeks. Soil was incubated PE PLA 1%...
Here, we report a new metagenome-assembled genome (MAG) from marine Rhizobiaceae species. The MnEN-MB40S was assembled manganese-oxidizing enrichment culture metagenome. A 4.1-Mb MAG comprising 26 contigs, with GC content of 60.0%, obtained. This contributes to the genomic information regarding family Rhizobiaceae.
高濃度の有機物・カチオン・硫酸塩含有糖蜜廃水を対象とした高速廃水処理装置の開発を目的とし,高温多段型上昇流嫌気性汚泥床(MS-UASB)反応槽と中温UASB反応槽を基本としたシステムに関して,糖蜜廃水の連続処理性能および処理条件に応じたMS-UASB反応槽保持汚泥の微生物叢を調査した.MS-UASB反応槽は最大CODcr容積負荷42kgCODcr·m-3·d-1を許容し,この条件においてシステム全体としてCODcr除去率82%,BOD除去率90%を達成した.最大容積負荷条件では,酢酸酸化細菌のThermacetogenium属,酪酸酸化細菌のSyntrophothermus属と水素資化性メタン生成古細菌のMethanothermobacter属とが優占していた.このことから酢酸からのメタン生成はこれらの微生物の共生により,酢酸酸化・水素生成経由で進行していたことが示唆された.