http://tvhdh.vnio.org.vn:8080/dspace/handle/123456789/4 Fri, 07 Aug 2026 12:07:40 GMT 2026-08-07T12:07:40Z http://tvhdh.vnio.org.vn:8080/dspace/handle/123456789/21800 Title: Tinh sạch một phần và nghiên cứu một số tính chất của superoxide dismutase (SOD1) từ tôm sú (Penaeus monodon). Authors: Trần, Minh Hiền; Nguyễn, Thị Hồng Loan; Trịnh, Đình Quỳnh; Ngô, Thị Trang; Đặng, Thị Lụa; Phan, Tuấn Nghĩa Abstract: Superoxide dismutase (SOD, EC.1.15.1.1) là enzyme phân hủy gốc superoxide,thuộc nhóm các dạng oxiphản ứng và có vai trò quan trọng trong bảo vệtổn thương oxihóa ởcác cơ thểsinh vật, đặc biệt,SOD còn có vai trò trongđáp ứng miễn dịch ởtôm.Trong nghiên cứunày,chúng tôi đã phát hiện thấyhoạt độSOD tổng sốcủa mô cơ tôm sú cao hơn 10 lần so với của huyết tương, tuy nhiênhoạt độriêng SOD trong huyết tương lại cao hơn trong cơ gấp 9,2 lầnso với trong mô cơ, điều này chứng tỏcó sựtập trung của SOD trong huyếttương. Bằng phương pháp điện di gel hoạt tính, chúng tôi phát hiệnthấy có 2 dạngSOD trong huyết tương trong khi chỉcó một dạngSOD trong mô cơ của tôm sú.Sửdụng phương pháp sắc ký trao đổi ion qua cột DE-52cellulosevà Q-sepharose, chúng tôiđãthu nhận được một chếphẩm SOD (SOD1) có độsạch cao hơn ban đầu 31,2 lần;trên điện di gel polyacrylamide có chứa SDS, chếphẩm cho một băng proteinchính có khối lượng phân tửkhoảng 24kDa. SOD1 hoạt động tốt nhất ở45oC và pH5,5.Ởnồng độ5 mM, Mn2+có tác dụng hoạt hóa mạnh SOD1(tăng lên tới 200%),Ca2+và Zn2+ cókhảnăng làm tăng 20% hoạt độenzyme,trong khi đó Cu2+lại ức chếhơn 60% hoạt độcủa SOD1. Wed, 01 Jan 2020 00:00:00 GMT http://tvhdh.vnio.org.vn:8080/dspace/handle/123456789/21800 2020-01-01T00:00:00Z http://tvhdh.vnio.org.vn:8080/dspace/handle/123456789/21799 Title: Diversity of the genus Sargassum (Fucales: Sargassaceae) in Tho Chu Archipelago, Kien Giang Province. Authors: Nguyen, Van Tu Abstract: Our study investigated 12 study sites in four main islands of Tho Chu archipelago in 2019. Six Sargassum species were recorded for the flora of Tho Chu Archipelago are Sargassum aquifolium (Turner) C.Agardh, Sargassum feldmannii Pham-Hoang Ho, Sargassum ilicifolium (Turner) C.Agardh, Sargassum mcclurei Setchell, Sargassum oligocystum Montagne, Sargassum polycystum C.Agardh. Among these species, the Sargassum oligocystum Montagne, Sargassum feldmannii Pham-Hoang Ho and Sargassum mcclurei Setchell were newly recorded for West Sea of Vietnam. There was a significant difference in species composition between Tho Chu, Hon Xanh, Hon Tu and Hon Cao islands; among them, Hon Xanh island differed from the other three islands by 28%, Hon Tu island and Tho Chu island were mostly similarity in flora composition with the similarity index of 85.7%. The morphology of some Sargassum species varied by ecological characteristics, especially for Sargassum aquifolium (Turner) C. Agardh and Sargassum oligocystum Montagne. Wed, 01 Jan 2020 00:00:00 GMT http://tvhdh.vnio.org.vn:8080/dspace/handle/123456789/21799 2020-01-01T00:00:00Z http://tvhdh.vnio.org.vn:8080/dspace/handle/123456789/21798 Title: An updated list of monogenoidea from marine fishes of Vietnam. Authors: Nguyen, Manh Hung; Nguyen, Van Ha; Ha, Duy Ngo Abstract: In this paper, we updated the list of monogenean species from marine fishes of Vietnam. Taxonomic position of monogenean species were arranged according to the current classification system. A total of 220 monogenean species from 152 marine fish species were listed. Distribution, hosts and references of each species were given. In addition, amendations of taxonomic status of taxa were also updated. Wed, 01 Jan 2020 00:00:00 GMT http://tvhdh.vnio.org.vn:8080/dspace/handle/123456789/21798 2020-01-01T00:00:00Z http://tvhdh.vnio.org.vn:8080/dspace/handle/123456789/21797 Title: Research on the effects of temperature, salinity and nutrition to the growth of the Betaphycus gelatinus (Esper) Doty. Authors: Vo, Thanh Trung; Tran, Van Huynh; Tran, Mai Duc; Le, Trong Nghia; Pham, Duc Hung Abstract: Betaphycus gelatinus (Esper) Doty (BG) is a red seaweed that has been used as a food and a research material. Thus, the study on factors affecting the growth and development of BG is necessary. The present results show that the good growth conditions of BG are 27 oC, 30‰ of salinity, and add PES or Nitrate-phosphate medium. This research has important scientific significance in preserving and restoring rare and valuable commercial seaweed varieties. Fri, 01 Jan 2021 00:00:00 GMT http://tvhdh.vnio.org.vn:8080/dspace/handle/123456789/21797 2021-01-01T00:00:00Z http://tvhdh.vnio.org.vn:8080/dspace/handle/123456789/21796 Title: Optimization of cultivation conditions of the heterotrophic marine microalga Thraustochytrium aureum BT6 oriented to exploit bioactive compounds Authors: Le, Thi Thom; Hoang, Thi Minh Hien; Ngo, Thi Hoai Thu; Luu, Thi Tam; Nguyen, Cam Ha; Dang, Diem Hong Abstract: Thraustochytrium is a heterotrophic marine microalgae genus belonging to the Labyrinthula class, Thraustochytriaceae (Thraustochytrids) family. Recently, studied results have showed that some species/strains of Thraustochytrium genus are potential candidates to produce biomass rich in lipid containing high polyunsaturated fatty acid (PUFAs), especially docosahexaenoic (DHA C22: 6 ω-3), carotenoid, extracellular polysaccharides (EPSs) and enzymes which play a crucial role in human health. Therefore, throughout many decades, numerous studies have been conducted in exploiting bioactive compounds, especially PUFAs. Biomass and PUFAs yield of some strains Thraustochytrium spp. depend on environmental conditions. In this paper, the results on the effects of different culture conditions on the growth of Thraustochytrium aureum BT6 (isolated from coastal regions of Binh Thuan in 2010) in 500 mL erlenmeyer flask and 30 L fermentors is presented. Suitable conditions for the growth of strain BT6 were: Bajpai medium, 2% glucose, 0.5% yeast extract, temperature of 20−28 oC, salt concentration 0.5%; and initial algal cell concentration of 2 g/L. The dry biomass, lipid and DHA contents of strain BT6 in 500 mL erlenmeyer flasks and 30 L fermentor reached the highest levels of 8.56 ± 0.12 and 6.92 ± 0.27 g/L, 18.36 ± 1.15 and 5.50 ± 0.133% DCW, 2.00 ± 0.05 and 0.14 ± 0.01% DCW, respectively, after 4 days of cultivation. Carotenoid content in flask and 30L fermentor achieved 44.45 ± 1.4 and 28.84 ± 1.12 mg/kg DCW, respectively after 4 days of cultivation. Obtained results have indicated that the algae biomass met the requirements in orientation to exploit valuable bioactive compounds. Fri, 01 Jan 2021 00:00:00 GMT http://tvhdh.vnio.org.vn:8080/dspace/handle/123456789/21796 2021-01-01T00:00:00Z