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SUMMARY The paper presented the initial results of total coliforms (TC) and fecal coliform (FC) in the Red River system, the section from Yen Bai city to Hanoi city in the period from January to December 2013. The results showed that TC and FC densities varied in a high range: TC from 23 to 13,000 MPN/100 ml, and FC from 0 to 1,600 MPN/100 ml. A...
7 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 590 | Lượt tải: 0
Xử lí mẫu rong với 0,5% - 1% chất tẩy rửa trong thời gian 5 phút, kết hợp với 0,5% - 1% betadine trong thời gian 2 – 3 phút, cuối cùng xử lí với 0,5% - 1% kháng sinh phổ rộng trong thời gian 1 ngày và nuôi mô cấy ở 5 - 25 µmol photon/ m2/s trong môi trường agar 1- 1,5% có bổ sung PES cho cụm mô sẹo to và có tỷ lệ sản xuất mô sẹo cao (87 – 98%...
8 trang | Chia sẻ: yendt2356 | Ngày: 30/11/2020 | Lượt xem: 680 | Lượt tải: 0
SUMMARY Hippeastrum is one of the most beautiful flowers and widely growed in Vietnam. In some recent years, number of people loving Hippeastrum is increasing. That is the result why Hippeastrum breeding is a necessary task today. However, the identification and early detection of hybrid Hippeastrum in Vietnam is difficult work. Therefore, the app...
7 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 514 | Lượt tải: 0
SUMMARY In aquaculture, Thalassiosira is used to feed to shrimp and shellfish larvae in hatcheries. It is considered preferable for this purpose to the other commercially available microalgae, Chaetoceros and Tetraselmis, because of its larger size which means it can continue to be used at more advanced larval stages. Salinity is one of the envi...
5 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 627 | Lượt tải: 0
The Leucine-rich repeat receptor-like kinase (LRR-RLK), that is a receptor-like kinase consists of leucine rich repeat fragments, plays an important role in the plant growth and development as well as enhancing resistance ability against environmental stress factors. LRR-RLR promoter has been studied to increasing gene expression during stress c...
7 trang | Chia sẻ: yendt2356 | Ngày: 30/11/2020 | Lượt xem: 580 | Lượt tải: 0
SUMMARY In this study, 17 SSR markers were used to investigate genetic variation within and between four populations of P. krempfii in highland of Vietnam. There are 8/17 SSR markers revealed polymorphic. Among 42 putative genetic alleles were amplified, of which 32 were polymorphic (accounting for 76.19%). The genetic diversity were highest in ...
10 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 591 | Lượt tải: 0
Plant vaccine is a new tool to enrich available vaccine resources for protection of human and animal health. Plant vaccine offers several advantages over current conventional vaccines, including that storage and transportationare convenient after lyophilization, production costs are low, and the contamination of mammalian pathogens is avoided. Ho...
7 trang | Chia sẻ: yendt2356 | Ngày: 30/11/2020 | Lượt xem: 542 | Lượt tải: 0
SUMMARY Light intensity and photoperiod are two important factors to the growth and secondary metabolite accumulation of in vitro plants, especially under photoautotrophic micropropagation. Internodal segments carrying 1 leaf of in vitro Phyllanthus amarus plants were used as explants. Four explants were put on MS medium with half strength macro...
7 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 552 | Lượt tải: 0
Một số nghiên cứu trước đây từ các chuyến bay trong không gian cho thấy rằng, điều kiện không gian có thể gây đột biến cho thực vật (Halstead, Dutcher, 1987; Mei et al., 1998). Theo Gu và Shen (1989) khi nghiên cứu trên đối tượng cây Lúa mì đã ghi nhận rất nhiều sự sai khác của nhiễm sắc thể được quan sát do bị ảnh hưởng của điều kiện không ...
11 trang | Chia sẻ: yendt2356 | Ngày: 30/11/2020 | Lượt xem: 550 | Lượt tải: 0
SUMMARY It is the first time, the content of nutrients (protein, lipid, carbohydrate, ascorbic acid and mineral); anti-nutritional factors (total phenol, tannin); and metabolizable energy in plant parts which the Tonkin Snub-Nosed Monkey (TSNM) consumes and doesn’t consume have been analyzed and compared. The study results show that the food cho...
10 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 474 | Lượt tải: 0