A5021375281- Aquaculture disease management and microbiota
- Arsenic contamination and mitigation
- Fluoride Effects and Removal
- Aquaculture Nutrition and Growth
- Synthetic Organic Chemistry Methods
- Mine drainage and remediation techniques
- Clay minerals and soil interactions
- Force Microscopy Techniques and Applications
- Organoboron and organosilicon chemistry
- Coal and Its By-products
- Identification and Quantification in Food
- Probiotics and Fermented Foods
- Pharmaceutical and Antibiotic Environmental Impacts
- Studies on Chitinases and Chitosanases
- Heavy metals in environment
- Iron oxide chemistry and applications
- Microbial bioremediation and biosurfactants
- Carbon Nanotubes in Composites
- bioluminescence and chemiluminescence research
- Pesticide and Herbicide Environmental Studies
- Chromium effects and bioremediation
- Vibrio bacteria research studies
- Luminescence and Fluorescent Materials
- Odor and Emission Control Technologies
- Invertebrate Immune Response Mechanisms
National Institute of Advanced Industrial Science and Technology
2016-2025
Geological Survey of Japan
2016-2025
Kanagawa University
2016-2023
Tohoku University
2013-2023
Sagami Chemical Research Institute
2020-2022
Tokyo Institute of Technology
2022
Kanagawa Prefectural Ayase High School
2021
Hirosaki University
2018
Nihon University
2000-2014
Kumamoto Medical Center
2013
Aims: This study was conducted to clarify the taxonomic status of Bacteroides type A strains with high vitamin B12-producing ability that is widely distributed in intestinal tracts freshwater fish. Methods and Results: Seventeen isolated from five fish species were all rod-shaped gram-negative. The positive for esculin hydrolysis, nitrate reduction, resistance bile, acid phosphatase, negative production catalase urease susceptibility vancomycin. G+C content DNA 17 29·1–31·9 mol%, 16S rDNA...
Abstract Mechanochromic elastomers that exhibit force‐induced cross‐linking reactions in the bulk state are introduced. The synthesis of segmented polyurethanes (SPUs) contain difluorenylsuccinonitrile (DFSN) moieties main chain and methacryloyl groups side chains was carried out. DFSN selected as mechanophore because it dissociates under mechanical stimuli to form pink cyanofluorene (CF) radicals, which can also initiate radical polymerization methacrylate monomers. obtained generated CF...
In this study, arsenate, As(V), and fluoride (F) were simultaneously removed from contaminated water using MgO, Mg(OH)2, MgCO3 as Mg-based adsorbents, existing studies only focus on their individual removal. The removal performance of As(V) F followed the order < Mg(OH)2 MgO. Under test conditions, MgO met environmental standards for As (0.01 0.8 mg/L, respectively), but did not. was not significantly affected by an increase in initial concentration. It concluded that adsorbed more...
The amylase-producing ability of the intestinal microflora in cultured specimens ayu, carp, channel catfish, Japanese eel and tilapia was determined. Mean viable counts aerobes anaerobes ranged from 1.1 x 10(6) to 3.7 10(8) cfu g-1 1.3 10(3) 1.6 g-1, respectively. Aeromonas spp. Bacteroidaceae were predominant four five fish species. Of 206 strains examined, 65 (31.6%) produced > or = 0.01 U amylase ml-1. percentage producers differed among families genera bacteria While 56% amylase, only...
The exploration of mechanochemical reactions has brought new opportunities for the design functional materials. We synthesized novel organic peroxide mechanophore bis(9-methylphenyl-9-fluorenyl) (BMPF) and examined its mechanochromic properties. mechanism behind mechanofluorescence was clarified harnessed in polymer networks that can release small fluorescent molecule 9-fluorenone upon exposure to a mechanical stimulus. Additionally, cross-linked with BMPF units are able tolerate...
While statin intake has been proven to reduce the risk of colorectal cancer (CRC), mechanism antitumor effects and clinical significance in survival benefits remain unclear. Statin-induced antiproliferative its underlying were examined using six CRC cell lines. Statins except pravastatin showed (simvastatin ≥ fluvastatin > atorvastatin) even though both simvastatin could activate mevalonate pathways, suggesting statin-mediated depended on non-mevalonate pathway. Indeed, induced p27(KIP1)...
Vibrio sp. strain NM 10 with an inhibitory activity against Pasteurella piscicida K-III was isolated from the intestine of a spotnape ponyfish (Leiognathus nuchalis). This bacterium efficiently produced antibacterial substance after growth at 20 degrees C for 24 h on 1/5 PYBG agar prepared 50% seawater pHs 7.5 to 9.0. The heat labile and proteinaceous, molecular mass less than 5 kDa, possibly bacteriocin or bacteriocin-like substance.
Aeromonas isolates were obtained from fish intestines, water, and sediments an urban river identified by the DNA-DNA microplate hybridization method. The veronii (22%), caviae (18%), hydrophila (13%), sobria (8%), jandaei (7%), other spp. (33%). species occurred at high densities with incidences, regardless of season. results strongly suggest that aeromonads are indigenous in rivers have potential to be predominant aquatic environments.
The aim of the present study was to clarify taxonomic status intestinal bacteria isolated from Japanese flounder (Paralichthys olivaceus) and describe their ability digest chitin.Phylogenetic analysis based on 16S ribosomal DNA (rDNA) sequences showed that 82 representative isolates were closely related three major species marine vibrios, Vibrio scophthalmi-Vibrio ichthyoenteri group (41 isolates), fischeri (39 isolates) harveyi (two with similarities 97.2-99.8%, 96.4-100% 98.6-99.5%...
Damage to human health caused by As-contaminated water can be prevented using proper As-removal techniques, such as employing excellent arsenic adsorbents. In this study, the combined addition of Mg- and Ca-based adsorbents was investigated for efficient removal As from contaminated water. Following a previous study on As(V), tests targeting As(III) several additional tests, including X-ray diffraction analysis, were conducted clarify mechanism improved performance combined-addition removal....
Survival of bacterial fish pathogens, including Enterococcus seriolicida, Vibrio anguillarum, and Pasteurella piscicida, in ozonated seawater was determined a batch system. Bacterial counts all pathogens decreased at more than 0.040 to 0.060 mg total residual oxidants (TROs) per liter, whereas no decrease viable observed less 0.018 0.028 TROs liter. The 99% inactivation point achieved concentrations 0.111 mg/liter for E. 0.063 P. 0.064 V. anguillarum within 1 min. Moreover, the mean 99 99.9%...
Algicidal bacteria offer a promising tool for the prevention of red tides, because they are able to play key role in terminating blooms coastal areas. This study details detection vast numbers algicidal attached surface seaweeds such as Ulv sp. and Gelidium (of order 106 cells g−1 wet weight some cases). were isolated from Ulva coast Osaka Bay April September 1999, their properties assessed using prey microalgae Karenia mikimotoi, Heterosigma akashiwo, Fibrocapsa japonica Chattonella...
The Suzuki-Miyaura coupling polymerization of p-dibromophenylene and m-phenylenediboronic acid ester, as well m-dibromophenylene p-phenylenediboronic the combination two meta-phenylene monomers in presence t-Bu3PPd(0) catalyst selectively afforded cyclic polyphenylenes with polyphenylene bearing boronate moieties at both ends when excess dibromophenylene was used.
H. SUGITA, J. KAWASAKI, KUMAZAWA AND Y. DEGUCHI. 1996. The amylase‐producing ability of intestinal bacteria in one marine crab and seven fish species was determined. Mean total viable counts ranged from 1.3 × 105 to 1.5 108 cfu g−1, Vibrionaceae were predominant all specimens. Of 1585 strains examined, 341 (21.5%) produced ≥0.01 U amylase ml−1. Percentage producers (≥0.01 ml−1) differed among genera/families. High abilities (≥0.05 found 1.4‐3.6% Enterobacteriaceae, Pseudomonas strains. On...