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  • Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)  (7)
  • Ky, Pham Xuan  (7)
  • 2015-2019  (7)
Material
Publisher
  • Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)  (7)
Person/Organisation
Language
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  • 2015-2019  (7)
Year
  • 1
    Online Resource
    Online Resource
    Chemical composition and major volatile compounds of the hydrolyzed product from 〈i〉Kappaphycus alvarezii〈/i〉 by-products using flavourzyme
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2019
    In:  Tạp chí Khoa học và Công nghệ biển Vol. 19, No. 4A ( 2019-11-08), p. 123-130
    Details
    In: Tạp chí Khoa học và Công nghệ biển, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 19, No. 4A ( 2019-11-08), p. 123-130
    Abstract: The chemical composition of flavourzyme hydrolysis product from Kappaphycus alvarezii by-products was analyzed. The results showed that the protein hydrolysate powder had high content of proteins (21.66%) and low content of lipids (0.22%). Hydrolyzed products contained about 15 free amino acids with relatively high content of some amino acids such as aspartic acid (1,879 mg/100 g), glutamic acid (1,813 mg/100 g), glycine (1,121 mg/100 g), tyrosine (1,203 mg/100 g) ) and serine (3,165 mg/100 g). In addition, main volatile flavor compounds such as acetophenone; nonanal; indole; 2.4-di-tert-butylphenol; heptadecane; 6.10.14- trimethylpentadecan-2-one have also been discovered. As a result, the by-products of K. alvarezii take a potential role in the food industry.
    Type of Medium: Online Resource
    ISSN: 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/19/4A/14593
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2019
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    Online Resource
  • 2
    Online Resource
    Online Resource
    INVESTIGATION OF PROTEIN PATTERNS AND ANTIOXIDANT ACTIVITY OF COLLAGEN HYDROLYSATES FROM SKIN OF FAN-BELLIED LEATHERJACKET Monacanthus chinensis BY VARIOUS ENZYMES
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2019
    In:  Vietnam Journal of Marine Science and Technology Vol. 18, No. 4A ( 2019-03-14), p. 141-150
    Details
    In: Vietnam Journal of Marine Science and Technology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 18, No. 4A ( 2019-03-14), p. 141-150
    Abstract: Collagen extracted from the skin of fan-bellied leatherjacket was hydrolyzed and tested for antioxidant activity. The yields of acid soluble collagen (ASC) and pepsin soluble collagen (PSC) were 14.8% and 19.6%, respectively, based on the wet weight of skin. The SDS-PAGE results showed that collagen from the skin of this fish consists of α1 and α2 chains with molecular weight (MW) approximately 100 kDa, identified as type I collagen. Hydrolysis of collagen by the other enzymes, such as papain, bromelain, pepsin and alcalase could produce the peptides with MW less than 28 kDa. Hydrolyzed collagen possessed the antioxidant activity with different levels and greater than that of normal collagen.
    Type of Medium: Online Resource
    ISSN: 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/18/4A/13642
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2019
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    Online Resource
  • 3
    Online Resource
    Online Resource
    PRELIMINARY STUDY ON CHEMICAL MECHANISM OF DECREASE OF TETRODOTOXIN CONTENT IN OVARIES OF A PUFFER FISH Lagocephalus inermis (Temminck and Schlegel, 1850) FERMENTED WITH RICE BRAN
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2019
    In:  Tạp chí Khoa học và Công nghệ biển Vol. 19, No. 1 ( 2019-05-31), p. 93-102
    Details
    In: Tạp chí Khoa học và Công nghệ biển, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 19, No. 1 ( 2019-05-31), p. 93-102
    Abstract: Tetrodotoxins in salted and fermented ovaries with rice bran of a puffer fish Lagocephalus inermis (Temminck & Schlegel, 1850) during five months were determined by high-performance liquid chromatography with fluorometric detector (HPLC- FLD). The analysed results showed that the original ovaries contained only tetrodotoxin with content of 7.59 µg/g fresh weight. 4,9-Anhydrotetrodotoxin - an isomer which is less toxic than tetrodotoxin has been found in all ovary samples since the second month. Tetrodotoxin in the ovaries disappeared in the 4th month of the experiment. In addition, 4,9-anhydrotetrodotoxin level in ovaries increased during fermentation. The present study contributes to clarifying the chemical mechanism of decreasing tetrodotoxin content in fermented ovary of puffer fish.
    Type of Medium: Online Resource
    ISSN: 1859-3097 , 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/19/1/10742
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2019
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Cyanide detoxification efficiency of injection and soak of hydroxocobalamin, sodium nitrite and sodium thiosulfate for sea water ornamental fish
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2019
    In:  Tạp chí Khoa học và Công nghệ biển Vol. 19, No. 4A ( 2019-11-08), p. 139-150
    Details
    In: Tạp chí Khoa học và Công nghệ biển, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 19, No. 4A ( 2019-11-08), p. 139-150
    Abstract: The Oceanographic Museum offers interesting exhibits of several marine lives for tourist sightseeing and entertainment. These sea water ornamental fish are all caught in the wild. However, its health can be affected by cyanide poisoning during human fishing. Depending on the level of cyanide poisoning, fish can die after one and two weeks that caused economic damages for the museum. The present study is concerned with results of cyanide detoxification by using direct injection into cinnamon clownfish or soak of hydroxocobalamin, sodium nitrite and sodium thiosulfate with the aim of improving the health, survival and life time for fish, contributing to increasing economic efficiency for the Oceanographic Museum.
    Type of Medium: Online Resource
    ISSN: 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/19/4A/14588
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2019
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    Online Resource
  • 5
    Online Resource
    Online Resource
    APPLICATION OF IMMUNOAFFINITY CHROMATOGRAPHY FOR PURIFICATION OF ANTIBODY AGAINST DOMOIC ACID PRODUCED IN NEW ZEALAND WHITE RABBIT’S SERUM
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2017
    In:  Vietnam Journal of Marine Science and Technology Vol. 17, No. 1 ( 2017-03-31), p. 103-109
    Details
    In: Vietnam Journal of Marine Science and Technology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 17, No. 1 ( 2017-03-31), p. 103-109
    Abstract: In order to develop an ELISA KIT for detection of domoic acid (DA) in seafood in Vietnam, DA antibody was produced by immunizing in New Zealand white rabbit using DA-DSS (disuccinimidyl suberate)-BSA (Bovine Serum Albumin) as an antigen. The DA antibody in rabbit’s serum was purified for its use as a material of ELISA KIT. In antibody/antigen purification process, immunoaffinity chromatography (IAC) is considered as the best method by both its specification and ability to enrich antibody. However, DA is a hapten, and it is impossible to apply a regular immunizing principal for making an IAC column with DA as a solid phase to catch DA antibody. This paper presents a trial using polymer sepharose EAH 4B resin (omega-aminohexyl) IAC bound with hapten DA as a solid phase for DA antibody purification from rabbit’s serum. Using DSS as a chemical linker; then, based on the reaction between a carboxyl group of DA and a carbodiimide group of the resin EAH 4B, we were successful to make the IAC column with DA-DSS as the solid phase. Recovery ratio of the made IAC column reached 91.5 ± 1.5% (n = 3) to capture the antibody against DA standard. DA antibody from white rabbit’s serum was eluted successfully using this column with 0.5 M NaCl; 0.1 M PBS and then, 0.1 M Ldy-HCl solutions (pH 2.7). The obtained antibody was qualified by Western Blot using a specific reaction with the 2nd specific antibody HRP-labeled anti-goat IgG and the confirmed result revealed that it can be used as ELISA KIT material.
    Type of Medium: Online Resource
    ISSN: 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/17/1/9718
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2017
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    Online Resource
  • 6
    Online Resource
    Online Resource
    CERTAIN PROPERTIES OF CALCIUM HYDROXYAPATITE FROM SKIPJACK TUNA BONE (Katsuwonus pelamis)
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2019
    In:  Vietnam Journal of Marine Science and Technology Vol. 18, No. 4A ( 2019-03-14), p. 151-163
    Details
    In: Vietnam Journal of Marine Science and Technology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 18, No. 4A ( 2019-03-14), p. 151-163
    Abstract: This paper is concerned with certain properties of calcium hydroxyapatite from skipjack tuna bone (Katsuwonus pelamis) which are by-products of fish export industry. Hydroxyapatite Ca10(PO4)6(OH)2 and β-tricalcium phosphate Ca3(PO4)2, the high-value compounds, have been successfully extracted from skipjack tuna bones. The bones were heated at different temperatures of 600oC, 900oC, 1200oC. While at 600oC hydroxyapatites were obtained with Ca/P ratio of 1.658, comparable to the value of 1.67 found in human bone; the hydroxyapatite crystals of average size of 0.25 µm were formed with the same size distribution. In case of heated bone samples at 900°C and 1200°C, the calcium formed were biphasic calcium phosphate composed of hydroxyapatite and β-tricalcium phosphate; the Ca/P ratio was between 1.660–1.665; the calcium crystals of more than 1 µm were highly porous and connected to each other in priority orientation of tube direction.
    Type of Medium: Online Resource
    ISSN: 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/18/4A/13643
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2019
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    Online Resource
  • 7
    Online Resource
    Online Resource
    THÀNH PHẦN VÀ HOẠT TÍNH KHÁNG KHUẨN CỦA CAO ETYL AXETAT CHIẾT TỪ 3 LOÀI RONG ĐỎ THUỘC CHI LAURENCIA
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2018
    In:  Tạp chí Khoa học và Công nghệ Biển Vol. 18, No. 2 ( 2018-06-30), p. 187-196
    Details
    In: Tạp chí Khoa học và Công nghệ Biển, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 18, No. 2 ( 2018-06-30), p. 187-196
    Abstract: This paper is concerned with composition and antibacterial activities of ethyl acetate extracts from 3 species of Laurencia (Rhodophyta): Laurencia papillosa, Laurencia flexilis and Laurencia cartilaginea collected from the southern coasts of Vietnam. The results showed that ethyl acetate (EtOAc) extracts of these species displayed antibacterial activities against Salmonella typhimurium, Escherichia coli and Bacillus subtilis. The qualitative investigations revealed the presence of two sesquiterpene secondary metabolites Elatol and Palisadin A in EtOAc extracts from the three above- mentioned Laurencia species.
    Type of Medium: Online Resource
    ISSN: 1859-3097 , 1859-3097
    URL: Article
    DOI: 10.15625/1859-3097/18/2/8998
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2018
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    Online Resource
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