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Sponge’s biodiversity in the limestone islands in Viet Nam seaDistribution on different types of substrates Sponge is distributed over 6 types of bottom matter: Sand bottom, sand + gravel + rock, coral reef, mud + sand, clinging to organisms and other substrates. The analysis results showed that the highest number of sponge belongs to the coral reef bottom (48 species); the sand - gravel - rock bottom ...
9 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 77 | Lượt tải: 0
Intracellular reactive oxygen species scavenging effect of fucosterol isolated from the brown alga Sargassum crassifolium in Viet NamIntracellular ROS scavenging activity The intracellular ROS scavenging activity of test compound was evaluated by the fluorescence intensity resulting from converting reaction of DCFH-DA to fluorescent compound DCF. The effect of fucosterol on ROS level in H2O2 treated cells in comparison to negative control (DMSO 10%) was observed under fl...
8 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 42 | Lượt tải: 0
Secondary metabolites produced by marine actinomycetestreptomycessp G246Compound 7 was isolated as a white solid. Its ESI mass spectrum showed the pseudomolecular ion [M+H]+ at m/z 284. The 1H-NMR spectrum of 7 displayed signals of one singlet aromatic proton at δH 7.92(1H, s, H-8), a anomeric proton at δH 5.69 (1H, d, J = 6.0 Hz, H-1′) and a set of 5 protons of ribofuranose sugar moiety at ranging from δH3.52 to δH4...
8 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 37 | Lượt tải: 0
Effects of alcohol extract from defatted soybean meal on bile acid level, digestive enzyme activity and nutrient digestibility of pompano (trachinotus blochii)Cholecystokinin (CCK) has been known to stimulate release of exocrine pancreatic enzymes in yellowtail (Kofuji et al., 2007; Murashita et al., 2007, 2008), and also to contract the gallbladder to release bile juice in Atlantic salmon (Einarsson et al., 1997), rainbow trout (Aldman et al., 1992) and yellowtail (Murashita et al., 2007). The i...
11 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 42 | Lượt tải: 0
Distribution characteristics of temperature, salinity, chlorophyll-A, and sound speed in the Da Nang and Quy Nhon watersIn Quy Nhon transect, it is clearly seen that the sound velocity tends to fall gradually from the surface to the bottom and descends from the offshore to nearshore regions corresponding todepth. At the depth of about 40 m (station QN- 1, figure 5b) in the offshore area, there is a zone in which the sound velocity reaches the maximum value (1,...
6 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 50 | Lượt tải: 0
The DNA barcoding data and genetic distance of leaf beetles (coleoptera, chrysomelidae) in Viet NamDISCUSSION DNA barcoding is a useful tool for identifying species, providing information on specimens in different regions on the world. In this study, 16 DNA barcoding sequences of nine species examined in this work were recorded for the first time from Vietnam and five species Aulacophora mouhoti, Aspidimorpha dorsata, Chiridopsis bowring...
7 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 36 | Lượt tải: 0
Human-Elephant conflict in pumat national park region, nghe an province: Current status and impact on the conservation atitude of local residentsCONCLUSION Out of three elephant groups currently habiting Pu Mat NP region, only group in Anh Son District causes severe HEC, where they raid crop, destroy commercial tree plantations, houses and assets. The HEC causes relatively high economic damages for local villagers and rubber farms, threatens human life and induces human psychologica...
9 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 50 | Lượt tải: 0
The status of seagrass communities in the Truong Sa archipelagoCONCLUSIONS AND RECOMMENDATION Eight species with dominating Thalassodendronciliatum (Forssk.) Hartog, belonging to 5 genera, 2 families, order Hydrocharitales, class Monocotyledoneae, phylum Angiospermae were recorded in the Truong Sa archipelago. Among these species, Syringodium isoetifolium (Asch.) Dandy is a newly recorded species in Th...
11 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 31 | Lượt tải: 0
Numerical model for simulation of waves in surfzone and nearshore areas based on Boussinesq equations: Results for plane beachesKẾT LUẬN Bài báo trình bày kết quả nghiên cứu phát triển thành công mô hình số dựa trên hệ phương trình Boussinesq mở rộng và kết hợp cải tiến tiêu tán năng lượng do sóng đổ. Mô hình được xây dựng dựa trên sự kết hợp giải số theo phương pháp thể tích hữu hạn với sơ đồ TVD và sai phân trung tâm cho thành phần phân tán sóng Boussinesq. Các m...
12 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 30 | Lượt tải: 0
Using the chloroplast rbcl gene to clarify the relationship between species of the genus stephania (menispermaceae) from Viet NamDISCUSSION The rbcL gene was used as DNA barcode to identify species in flowering plant, but its limitations have also been shown by previous studies. Previous studies showed that 58.5% of sister species were not identifiable by the rbcL gene sequence (Kang, 2017) because of the 100% similarity. In this study, with 4 samples of 3 species an...
7 trang | Chia sẻ: hachi492 | Ngày: 25/02/2022 | Lượt xem: 46 | Lượt tải: 0
