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  1. Article ; Online: Measurement of the Adhesion Force of a Living Sessile Organism on Antifouling Coating Surfaces Prepared with Polysulfobetaine-Grafted Particles.

    Takeuchi, Kanae / Sato, Ryota / Nogata, Yasuyuki / Kobayashi, Motoyasu

    Langmuir : the ACS journal of surfaces and colloids

    2023  Volume 39, Issue 49, Page(s) 17984–17992

    Abstract: An antifouling polymer brush-like structure was fabricated by a simple and versatile dip-coating method of sulfobetaine containing copolymer-grafted silica nanoparticles (SiNPs) and alkyl diiodide cross-linkers. Surface-initiated atom transfer radical ... ...

    Abstract An antifouling polymer brush-like structure was fabricated by a simple and versatile dip-coating method of sulfobetaine containing copolymer-grafted silica nanoparticles (SiNPs) and alkyl diiodide cross-linkers. Surface-initiated atom transfer radical copolymerization of 3-(
    Language English
    Publishing date 2023-11-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.3c02686
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Anti-Barnacle Activities of Isothiocyanates Derived from β-Citronellol and Their Structure-Activity Relationships.

    Tanikawa, Aina / Fujihara, Takaya / Nakajima, Natsumi / Maeda, Yuka / Nogata, Yasuyuki / Yoshimura, Erina / Okada, Yohei / Chiba, Kazuhiro / Kitano, Yoshikazu

    Chemistry & biodiversity

    2023  Volume 20, Issue 2, Page(s) e202200953

    Abstract: Antifouling agents with low toxicity are in high demand for sustaining marine industries and the environment. This study aimed to synthesize 15 isothiocyanates derived from β-citronellol and evaluate their antifouling activities and toxicities against ... ...

    Abstract Antifouling agents with low toxicity are in high demand for sustaining marine industries and the environment. This study aimed to synthesize 15 isothiocyanates derived from β-citronellol and evaluate their antifouling activities and toxicities against cypris larvae of the barnacle Amphibalanus amphitrite. The synthesized isothiocyanates exhibited effective antifouling activities (EC
    MeSH term(s) Animals ; Thoracica ; Cyanides ; Structure-Activity Relationship ; Acyclic Monoterpenes ; Larva ; Biofouling
    Chemical Substances citronellol (P01OUT964K) ; Cyanides ; Acyclic Monoterpenes
    Language English
    Publishing date 2023-01-12
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2139001-0
    ISSN 1612-1880 ; 1612-1872
    ISSN (online) 1612-1880
    ISSN 1612-1872
    DOI 10.1002/cbdv.202200953
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  3. Article: Hemolytic compound 3,7,11,15-tetramethyl-hexadecan-1,19-disulfate found in the invasive European sea squirt Ascidiella aspersa

    Nagai, Hiroshi / Shibahara, Shuya / Matsushima, Ryoji / Uchida, Hajime / Kanamori, Makoto / Nogata, Yasuyuki / Kamio, Michiya

    Fisheries science. 2021 Jan., v. 87, no. 1

    2021  

    Abstract: The solitary European sea squirt Ascidiella aspersa was introduced to northern Japan, causing dense coverage of the aquacultured Japanese scallop Mizuhopecten yessoensis. There are concerns that allelopathy by the sea squirt will suppress the growth of ... ...

    Abstract The solitary European sea squirt Ascidiella aspersa was introduced to northern Japan, causing dense coverage of the aquacultured Japanese scallop Mizuhopecten yessoensis. There are concerns that allelopathy by the sea squirt will suppress the growth of the scallop. Herein, we studied the allelopathic and defensive potential of A. aspersa using hemolytic assay. An alkyl sulfate, viz. 3,7,11,15-tetramethyl-hexadecan-1,19-disulfate (1), was isolated as a hemolytic compound, and 1 showed mild toxicity against the Japanese scallop and brine shrimp.
    Keywords Artemia ; Ascidiacea ; Japan ; Mizuhopecten yessoensis ; allelopathy ; scallops ; sulfates ; toxicity
    Language English
    Dates of publication 2021-01
    Size p. 145-150.
    Publishing place Springer Japan
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 1192654-5
    ISSN 1444-2906 ; 0919-9268
    ISSN (online) 1444-2906
    ISSN 0919-9268
    DOI 10.1007/s12562-020-01483-5
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    In stock of ZB MED Bonn / Germany

    Z 5906: Show issues

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  4. Article: Impact of the acute ammonia toxicity on phyllosoma Stage I of a slipper lobster, Ibacus novemdentatus and its recoverability from the ammonia exposure

    Quan, Nguyen Hong / Suzuki, Kenta / Nogata, Yasuyuki / Wakabayashi, Kaori

    Aquaculture research. 2021 Nov., v. 52, no. 11

    2021  

    Abstract: Slipper lobsters are one of the commercially important crustaceans worldwide and are expected to be a potential aquaculture species. This study aimed to determine the acute toxicity of ammonia for Stage I larvae of a slipper lobster, Ibacus novemdentatus, ...

    Abstract Slipper lobsters are one of the commercially important crustaceans worldwide and are expected to be a potential aquaculture species. This study aimed to determine the acute toxicity of ammonia for Stage I larvae of a slipper lobster, Ibacus novemdentatus, and to examine whether they could recover after the ammonia exposure. Total ammonia (TAN) exposures at six different concentrations (0, 1, 2, 4, 8, and 16 mg L⁻¹) to 10 larvae in each treatment demonstrated that the mean lethal concentration of TAN for 96‐h (LC₅₀‐96 h) fluctuated in accordance with the larval viability: 2.81 mg L⁻¹ (0.21 mg L⁻¹ of unionized ammonia, NH₃‐N) when the larvae showed the survival rate of 47.7% from hatching to the Stage II at 0 mg L⁻¹ of TAN, and 6.88 mg L⁻¹ (0.56 mg L⁻¹ of NH₃‐N) when 96%. Stage I larvae showing the survival rates of 96% revealed their ability to recover from the 24‐h TAN exposure at up to 8 mg L⁻¹ and then reached Stage II. By using an application factor of 0.1, the estimated LC₅₀‐96 h in the present acute toxicity test suggests that the NH₃‐N should be maintained at 0.05 mg L⁻¹ or lower in a long‐term rearing of this species larvae.
    Keywords acute toxicity ; ammonia ; application parameters ; aquaculture ; larvae ; lethal concentration 50 ; lobsters ; research ; survival rate ; viability
    Language English
    Dates of publication 2021-11
    Size p. 5452-5461.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 1227359-4
    ISSN 1355-557X
    ISSN 1355-557X
    DOI 10.1111/are.15415
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    In stock of ZB MED Bonn / Germany

    Z 4230: Show issues

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  5. Article ; Online: Effective Synthesis and Antifouling Activity of Dolastatin 16 Derivatives.

    Casalme, Loida O / Katayama, Keisuke / Hayakawa, Yoshiki / Nakamura, Kensuke / Yamauchi, Arisa / Nogata, Yasuyuki / Yoshimura, Erina / Matsuda, Fuyuhiko / Umezawa, Taiki

    Marine drugs

    2022  Volume 20, Issue 2

    Abstract: Some derivatives of dolastatin 16, a depsipeptide natural product first obtained from the sea ... ...

    Abstract Some derivatives of dolastatin 16, a depsipeptide natural product first obtained from the sea hare
    MeSH term(s) Animals ; Aplysia/metabolism ; Biofouling/prevention & control ; Depsipeptides/chemical synthesis ; Depsipeptides/chemistry ; Depsipeptides/pharmacology ; Larva/drug effects ; Thoracica/metabolism
    Chemical Substances Depsipeptides ; dolastatin 16
    Language English
    Publishing date 2022-02-04
    Publishing country Switzerland
    Document type Comparative Study ; Journal Article
    ZDB-ID 2175190-0
    ISSN 1660-3397 ; 1660-3397
    ISSN (online) 1660-3397
    ISSN 1660-3397
    DOI 10.3390/md20020124
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  6. Article: Effective Synthesis and Antifouling Activity of Dolastatin 16 Derivatives

    Casalme, Loida O. / Katayama, Keisuke / Hayakawa, Yoshiki / Nakamura, Kensuke / Yamauchi, Arisa / Nogata, Yasuyuki / Yoshimura, Erina / Matsuda, Fuyuhiko / Umezawa, Taiki

    Marine drugs. 2022 Feb. 04, v. 20, no. 2

    2022  

    Abstract: Some derivatives of dolastatin 16, a depsipeptide natural product first obtained from the sea hare Dolabella auricularia, were synthesized through second-generation synthesis of two unusual amino acids, dolaphenvaline and dolamethylleuine. The second- ... ...

    Abstract Some derivatives of dolastatin 16, a depsipeptide natural product first obtained from the sea hare Dolabella auricularia, were synthesized through second-generation synthesis of two unusual amino acids, dolaphenvaline and dolamethylleuine. The second-generation synthesis enabled derivatizations such as functionalization of the aromatic ring in dolaphenvaline. The derivatives of fragments and whole structures were evaluated for antifouling activity against the cypris larvae of Amphibalanus amphitrite. Small fragments inhibited the settlement of the cypris larvae at potent to moderate concentrations (EC₅₀ = 0.60-4.62 μg/mL), although dolastatin 16 with a substituent on the aromatic ring (24) was much less potent than dolastatin 16.
    Keywords Balanus amphitrite ; Dolabella auricularia ; antifouling activities ; aromatic compounds
    Language English
    Dates of publication 2022-0204
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2175190-0
    ISSN 1660-3397
    ISSN 1660-3397
    DOI 10.3390/md20020124
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  7. Article ; Online: Isocyanides Derived from α,α-Disubstituted Amino Acids: Synthesis and Antifouling Activity Assessment.

    Inoue, Yuki / Takashima, Shuhei / Nogata, Yasuyuki / Yoshimura, Erina / Chiba, Kazuhiro / Kitano, Yoshikazu

    Chemistry & biodiversity

    2018  Volume 15, Issue 3, Page(s) e1700571

    Abstract: Herein, we contribute to the development of environmentally friendly antifoulants by synthesizing eighteen isocyanides derived from α,α-disubstituted amino acids and evaluating their antifouling activity/toxicity against the cypris larvae of the Balanus ... ...

    Abstract Herein, we contribute to the development of environmentally friendly antifoulants by synthesizing eighteen isocyanides derived from α,α-disubstituted amino acids and evaluating their antifouling activity/toxicity against the cypris larvae of the Balanus amphitrite barnacle. Almost all isocyanides showed good antifouling activity without significant toxicity and exhibited EC
    MeSH term(s) Amino Acids/chemistry ; Animals ; Biofouling/prevention & control ; Cyanides/chemical synthesis ; Cyanides/chemistry ; Cyanides/pharmacology ; Dose-Response Relationship, Drug ; Larva/drug effects ; Molecular Structure ; Pest Control ; Structure-Activity Relationship ; Thoracica/drug effects
    Chemical Substances Amino Acids ; Cyanides
    Language English
    Publishing date 2018-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2139001-0
    ISSN 1612-1880 ; 1612-1872
    ISSN (online) 1612-1880
    ISSN 1612-1872
    DOI 10.1002/cbdv.201700571
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  8. Article ; Online: Seasonal alternation of the ontogenetic development of the moon jellyfish Aurelia coerulea in Maizuru Bay, Japan.

    Suzuki, Kentaro S / Suzuki, Keita W / Kumakura, Emi / Sato, Kana / Oe, Yutaro / Sato, Tasuku / Sawada, Hideki / Masuda, Reiji / Nogata, Yasuyuki

    PloS one

    2019  Volume 14, Issue 11, Page(s) e0225513

    Abstract: Outbreaks of moon jellyfish Aurelia spp. are frequently reported from many parts of the world's coastal areas. Aurelia spp. canonically show a metagenetic life cycle in which planulae transform into sessile polyps, which can drastically increase in ... ...

    Abstract Outbreaks of moon jellyfish Aurelia spp. are frequently reported from many parts of the world's coastal areas. Aurelia spp. canonically show a metagenetic life cycle in which planulae transform into sessile polyps, which can drastically increase in number through asexual reproduction. Therefore, their asexual reproduction has been recognized as one of the major causes of the outbreaks. Aurelia spp. also show direct development that lacks asexual reproduction during the polyp stage, which prevents us from understanding the mechanisms of its outbreaks. To clarify the seasonality of the metagenetic and direct-development life cycles of Aurelia sp. in Maizuru Bay, Japan, we conducted field observations and laboratory experiments throughout the year. Additionally, the two life cycle types were genetically analyzed to confirm that they belong to the single species Aurelia coerulea, which dominates in coastal waters in Japan. From July until October, Aurelia coerulea produced smaller eggs and planulae all of which developed into polyps. However, from December until May, larger eggs and planulae were produced and 90% of the planulae developed into planktonic ephyrae bypassing the sessile polyp stage. Our results demonstrated that a single species, A. coerulea, seasonally shifts between their two life cycle types at a water temperature threshold of 20°C in Maizuru Bay. The higher energy storage of larger planulae was suggested to enable the planulae to develop into ephyrae without external energy input through feeding during the polyp stage. The adaptive significances of the two life cycle types were also discussed.
    MeSH term(s) Animals ; Bays ; Electron Transport Complex IV/genetics ; Evolution, Molecular ; Female ; Japan ; Life Cycle Stages ; Phylogeny ; Scyphozoa/genetics ; Scyphozoa/growth & development ; Seasons ; Sequence Analysis, DNA/methods
    Chemical Substances Electron Transport Complex IV (EC 1.9.3.1)
    Language English
    Publishing date 2019-11-21
    Publishing country United States
    Document type Journal Article
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0225513
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  9. Article ; Online: Synthesis and Structure-Activity Relationship of Omaezallene Derivatives.

    Umezawa, Taiki / Prakoso, Nurcahyo Iman / Kannaka, Miho / Nogata, Yasuyuki / Yoshimura, Erina / Okino, Tatsufumi / Matsuda, Fuyuhiko

    Chemistry & biodiversity

    2019  Volume 16, Issue 1, Page(s) e1800451

    Abstract: Omaezallene derivatives (nor-bromoallene, nor-bromodiene, and bromoenynes) were successfully synthesized. Their antifouling activity and toxicity to the cypris larvae of the barnacle Amphibalanus amphitrite and ecotoxicity to the marine crustacean ... ...

    Abstract Omaezallene derivatives (nor-bromoallene, nor-bromodiene, and bromoenynes) were successfully synthesized. Their antifouling activity and toxicity to the cypris larvae of the barnacle Amphibalanus amphitrite and ecotoxicity to the marine crustacean Tigriopus japonicus were studied. It was revealed that the two side chains of omaezallene were essential to its antifouling activity because the activities of nor-bromoallene and nor-bromodiene were significantly diminished. The bromoenyne was found to exhibit potent antifouling activities comparable to omaezallene with low toxicity and ecotoxicity. Preparation of bromoenyne framework is much easier than that of bromodiene moiety in omaezallene. Based on the antifouling activities of the bromoenynes, the synthesis of fluorescent probes and evaluation of their biological activities were also carried out.
    MeSH term(s) Animals ; Chromatography, Thin Layer ; Crustacea/drug effects ; Crustacea/genetics ; Drug Design ; Fluorescent Dyes/chemical synthesis ; Fluorescent Dyes/pharmacology ; Hydrocarbons, Brominated/chemical synthesis ; Hydrocarbons, Brominated/chemistry ; Hydrocarbons, Brominated/pharmacology ; Larva/drug effects ; Spectrum Analysis/methods ; Structure-Activity Relationship ; Thoracica/drug effects ; Thoracica/growth & development
    Chemical Substances Fluorescent Dyes ; Hydrocarbons, Brominated ; omaezallene
    Language English
    Publishing date 2019-01-11
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2139001-0
    ISSN 1612-1880 ; 1612-1872
    ISSN (online) 1612-1880
    ISSN 1612-1872
    DOI 10.1002/cbdv.201800451
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  10. Article ; Online: Anti-barnacle Activity of Isocyanides Derived from Amino Acids.

    Fukuda, Takuya / Wagatsuma, Hideki / Kominami, Yoshifumi / Nogata, Yasuyuki / Yoshimura, Erina / Chiba, Kazuhiro / Kitano, Yoshikazu

    Chemistry & biodiversity

    2016  Volume 13, Issue 11, Page(s) 1502–1510

    Abstract: Creation of new potent antifouling active compounds is important for the development of environmentally friendly antifouling agents. Fifteen isocyanide congeners derived from proteinogenic amino acids were synthesized, and the antifouling activity and ... ...

    Abstract Creation of new potent antifouling active compounds is important for the development of environmentally friendly antifouling agents. Fifteen isocyanide congeners derived from proteinogenic amino acids were synthesized, and the antifouling activity and toxicity of these compounds against cypris larvae of the barnacle Balanus amphitrite were investigated. All synthesized amino acid-isocyanides exhibited potent anti-barnacle activity with EC
    MeSH term(s) Amino Acids/chemistry ; Animals ; Biofouling/prevention & control ; Cyanides/chemistry ; Cyanides/isolation & purification ; Cyanides/pharmacology ; Molecular Structure ; Thoracica/drug effects
    Chemical Substances Amino Acids ; Cyanides
    Language English
    Publishing date 2016-11
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2139001-0
    ISSN 1612-1880 ; 1612-1872
    ISSN (online) 1612-1880
    ISSN 1612-1872
    DOI 10.1002/cbdv.201600063
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