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  • Hy, Le Ho Khanh  (4)
  • 2020-2024  (4)
  • 1
    Online Resource
    Online Resource
    Optimizing conditions for treatment and extraction of collagen from fan-bellied leatherjacket skin 〈i〉Monacanthus chinensis〈/i〉 (Osbeck, 1765)
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2021
    In:  Tạp chí Khoa học và Công nghệ biển Vol. 20, No. 4A ( 2021-04-11), p. 141-154
    Details
    In: Tạp chí Khoa học và Công nghệ biển, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 20, No. 4A ( 2021-04-11), p. 141-154
    Abstract: The fan-bellied leatherjacket skin was treated to extract collagen by chemical method. The non-collagenous substances and the pigment in the skin were removed with NaOH and H2O2, respectively. Collagen was extracted with acetic acid. The treatment and extraction conditions were optimized by response surface methodology. The concentrations, skin/solution ratios (g/ml) and times were surveyed. The optimum conditions to remove the non-collagenous substances were as follows: the concentration of NaOH at 0.15M, the ratio (g/ml) at 1/13.9, time at 56.9 hours. Using H2O2 with the concentration at6%, the skin/solution ratio (g/ml) at 1/2, time at 10 minutes were suitable values for skin pigmentation removal. For collagen extraction, the concentration of acetic acid at 0.53M, skin/solution ratio at 1/9.6 g/ml and time in 59.6 hours were optimal.
    Type of Medium: Online Resource
    ISSN: 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/15657
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2021
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  • 2
    Online Resource
    Online Resource
    Antioxidant activity of extract from some squid species in Khanh Hoa
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2021
    In:  Tạp chí Khoa học và Công nghệ biển Vol. 20, No. 4A ( 2021-04-11), p. 187-198
    Details
    In: Tạp chí Khoa học và Công nghệ biển, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 20, No. 4A ( 2021-04-11), p. 187-198
    Abstract: The antioxidant activities against DPPH free radical of crude extracts using ethyl acetate and methanol from ink sac, muscles, and bones of 5 squid species (Uroteuthis chinensis, Uroteuthis sibogae, Uroteuthis duvaucelii, Sepia esculenta, Sepioteuthis lessoniana) collected in Khanh Hoa waters were investigated. These activities ranged from 4.21% (ethyl acetate extract from ink of U. chinensis) to 54.51% (methanol extract from muscle of S. esculenta.). The functional group analysis by infrared adsorption spectrum (FTIR) in these crude extracts revealed the absorption peaks of melanin in ink, polysaccharide in bone and protein in muscle extracts. In addition, the SDS-PAGE result of some methanol extracts showed the presence of proteins with a molecular weight of 30-150 kDa.
    Type of Medium: Online Resource
    ISSN: 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/15660
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2021
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  • 3
    Online Resource
    Online Resource
    Certain properties of nanohydroxyapatite obtained from 〈i〉Lates calcarifer〈/i〉 fish bone
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2021
    In:  Tạp chí Khoa học và Công nghệ biển Vol. 20, No. 4A ( 2021-04-11), p. 173-186
    Details
    In: Tạp chí Khoa học và Công nghệ biển, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 20, No. 4A ( 2021-04-11), p. 173-186
    Abstract: Fish bone by-products are considered as abundant source of hydroxyapatite (HAp). The preparation of HAp from fish bones not only contributes to improving the value of by-products but also minimizes negative impacts on the environment. In this study, nanohydroxyapatite was successfully obtained from Lates calcarifer fish bone purchased from seafood export company in Khanh Hoa province. Fish bones were under alkali treatment and then heated at 600oC within different time intervals of 1, 2 and 4 hours. Analysis of XRD and SEM showed that the calcium formed was completely single-phase and possessed an average size of 50–64 nm depending on the calcination time. The results of the Ca/P molar ratio from 1.839 to 1.847 prove that the nano-HAp powders are B-type biological hydroxyapatites, which has been confirmed by FTIR spectrum. In addition, the content of heavy metals such as As, Pb, Hg, Cd is detected within safety limits. These properties allow nano-HAp powders to be applied in food and medicine fields. 
    Type of Medium: Online Resource
    ISSN: 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/15659
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2021
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  • 4
    Online Resource
    Online Resource
    Toxin Responsible for Xanthid Crab Poisoning in Tinh Gia District, Thanh Hoa Province, Viet Nam
    Pleiades Publishing Ltd ; 2023
    In:  Russian Journal of Marine Biology Vol. 49, No. 1 ( 2023-02), p. 62-67
    Details
    In: Russian Journal of Marine Biology, Pleiades Publishing Ltd, Vol. 49, No. 1 ( 2023-02), p. 62-67
    Type of Medium: Online Resource
    ISSN: 1063-0740 , 1608-3377
    URL: Article
    DOI: 10.1134/S1063074023010029
    Language: English
    Publisher: Pleiades Publishing Ltd
    Publication Date: 2023
    detail.hit.zdb_id: 2031147-3
    detail.hit.zdb_id: 33920-9
    SSG: 12
    SSG: 21,3
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