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SUMMARY Streptococcus mutans is the primary etiological agent of human dental caries. The well-known extraordinary ability of S. mutans to adapt and survive the environment of human mouth is highly acidogenicity and strong exopolysaccharide (EPS) production, a skeleton of dental plaque (biofilm). In this research, the total biofilm biomass, as ...
6 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 887 | Lượt tải: 0
The conducted study deduced the following remarks: The proper time for microorganism attached inside the PVA particles is around 20 days and stabilization operation system. The moving bed biofilter technique combined well with conventional activated sludge which was applied for removing of high organic wastewater such as seafood processing. The...
9 trang | Chia sẻ: yendt2356 | Ngày: 30/11/2020 | Lượt xem: 699 | Lượt tải: 0
SUMMARY Interleukin-3 và Interleukin-11 are multifunctional cytokine, which modulates the proliferation, differentiation and maturation of various types of hematopoietic cells. Genes coding for IL-3 and IL-11 (NM_000588 and NM_000641 from GenBank) linked with pelB leader and restriction sequences of NdeI (5’end), NotI (3’end) were synthesized a...
6 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 852 | Lượt tải: 0
The narrowly endemic D. condorensis had similar photosynthetic performance to the locally abundant S. roxburghii in more common habitats of coastal sandy soil region in which ground water tables are deep (>20m), but had significantly higher photosynthetic activities in its specific habitat, where the ground water level is shallow (<10m). The...
12 trang | Chia sẻ: yendt2356 | Ngày: 30/11/2020 | Lượt xem: 815 | Lượt tải: 0
Lactobacillus bacteria present in many probiotic products. This paper investigated probiotic Lactobacillus strains isolated from the human gastrointestinal tract. 15 Lactobacillus strains were isolated from breast-fed infant faeces and identified by both traditional methods and genus-specific PCR method. In vitro experiments were designed to inv...
15 trang | Chia sẻ: yendt2356 | Ngày: 30/11/2020 | Lượt xem: 1073 | Lượt tải: 0
KẾT LUẬN Từ các mẫu đất và nước đã phân lập tuyển chọn được hai chủng R9, S15 trên môi trường MGB có bổ sung cơ chất 1,2-DCE là nguồn cacbon duy nhất. Đặc điểm hình thái khuẩn lạc, tế bào, đặc điểm sinh lý, sinh hóa và kết quả giải trình tự gen 16S ARNr cho thấy, chủng R9 thuộc chi Klebsiella, chủng S15 thuộc chi Pseudomonas với độ tương đ...
6 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 1004 | Lượt tải: 0
Fish species in the order Clupeiformes are economically important and to be conserved. However, in many species in this order, early developmental stages are either unknown or only partially known, especially in Vietnam. In the present study morphology of larvae and juveniles were examined for the Commerson’s anchovy Stolephorus commersonnii, th...
10 trang | Chia sẻ: yendt2356 | Ngày: 30/11/2020 | Lượt xem: 784 | Lượt tải: 0
SUMMARY Global warming and dwindling fossil fuel supplies have led to a need to develop new, clean and sustainable energy supplies. Amongst, biohydrogen is recognized as a clean, renewable and promising energy alternative for the future since it is efficient and environmentally friendly. There are many possible solutions and a number of these a...
9 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 812 | Lượt tải: 0
SUMMARY Biological production of sulfide using sulfate-reducing bacteria (SRB) and high affinity of sulfide to react with divalent metallic cations have important potential in treatment of heavy metal contaminated wastewater. The feed COD/SO42- ratio is an important parameter has been proposed to control the hydrogen sulfide production by SRB. ...
6 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 738 | Lượt tải: 0
Bighead carp is a freshwater fish species which has been culturing widely, particularly in Northern region. At present, information about chemical composition of this fish is still limited. This research was conducted to determine chemical composition of bighead carp cultured in Khanh Hoa province. Results showed that its tissue contained moistu...
9 trang | Chia sẻ: yendt2356 | Ngày: 30/11/2020 | Lượt xem: 967 | Lượt tải: 0