Tổng hợp tài liệu, ebook Khoa Học Tự Nhiên tham khảo.
SUMMARY Following screening acetylcholinesterase (AChE) inhibitory activity of 60 extracts from biomass of 10 Cordyceps spp. strains, 3 extracts with high AChE inhibitor activity, viz. polysaccharide DL0004 extract (51.80±1.41%), n-BuOH DL0006 extract (55.71±2.72%) and n-BuOH DL0015 extract (71.08±1.47%) were further tested for their ability to...
6 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 566 | Lượt tải: 0
Nanotechnology has been widely and efficiently used in many areas due to unique physicochemical properties of nano-materials in comparison with their larger bulk counterparts. However, materials application process also have potential risks to human health and the ecological environment. To evaluate the safety of nanomaterials in water environme...
7 trang | Chia sẻ: yendt2356 | Ngày: 30/11/2020 | Lượt xem: 581 | Lượt tải: 0
SUMMARY This study aimed to examine the in vitro maturation and produce embryos of in vitro fertilization from the germinal vesicle stage bovine oocytes cryopreserved by vitrification method in straws and microdrops. The cumulus-oocyte complexes (COCs) with three or more layers of cumulus cells and homogeneous cytoplasm were selected for cryopr...
8 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 531 | Lượt tải: 0
Một loài giáp xác chân chèo nước ngọt mới thuộc giống Halicyclops, H. songsonensis Tran, Le & Ho, sp. n. được mô tả từ các mẫu vật thu thập ở sông Son, tỉnh Quảng Bình, miền Trung Việt Nam. Loài mới H. songsonensis sp. n. khác với các loài gần gũi bởi sự kết hợp của các đặc điểm sau: công thức gai cứng đốt 3 nhánh ngoài chân I-IV là 3:4:4:3; đốt ...
9 trang | Chia sẻ: yendt2356 | Ngày: 30/11/2020 | Lượt xem: 468 | Lượt tải: 0
SUMMARY Giant clams have economic value and play an important role in coral reef ecology. However, in recent years, giant clam resources have been declining due to overexploitation. This study investigated the population genetic structure of giant clams (Tridacnae spp.) in South Central and Southern Vietnam’s coast. Analysis of genetic diversit...
6 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 498 | Lượt tải: 0
Interleukin-7 (IL-7) is a cytokine that plays an important role in promoting growth and development of CD4 and CD8 immune cells in humans. IL-7 is also a target of the attack of some invasive pathogens. In this study, IL-7- coding gene was cloned into pRTRA vector to generate a cassette 35S-IL7-cmyc-histag- 100xELP, and then this cassette was in...
7 trang | Chia sẻ: yendt2356 | Ngày: 30/11/2020 | Lượt xem: 577 | Lượt tải: 0
SUMMARY Sardine fish comprises about 50 genera with many species, the físh is widely distributed, and sometimes they migrate along the coast in large schools. All specimens Sardinella gibbosa were collected from Phu Quoc, Khanh Hoa, Da Nang and Cat Ba. Phylogram of species diversity was built based on neightbour joining algorithm using the sequ...
9 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 586 | Lượt tải: 0
Currently, the use of genes from plants to produce genetically modified (GM) crops (cistrangenic) has profoundly attracted scientists to develop environmentally friendly GM crops. One of the strategies to improve protein quality is to produce transgenic plants by overexpressing genes encoding the proteins with higher ratios of essential amino...
8 trang | Chia sẻ: yendt2356 | Ngày: 30/11/2020 | Lượt xem: 529 | Lượt tải: 0
SUMMARY With 28 samples of foliage and sapwood of Hevea brasiliensis collected from Ho Chi Minh city, Binh Phuoc province, Binh Duong province (Vietnam), we isolated and screened endophytes antagonistic to Corynespora cassiicola Berk. & Curt, the agent of Corynespora Leaf Fall disease. As a result, 21 strains of endophytic bacteria, 14 strains ...
7 trang | Chia sẻ: thucuc2301 | Ngày: 30/11/2020 | Lượt xem: 487 | Lượt tải: 0
Aspergillus oryzae is a filamentous fungus commonly used in industrial production of food and beverages in Vietnam and other Asian countries. Due to its safety and high secretion ability, this fungus has been widely exploited for production of recombinant proteins and enzymes. However, A. oryzae transformation is still mainly performed via funga...
11 trang | Chia sẻ: yendt2356 | Ngày: 30/11/2020 | Lượt xem: 535 | Lượt tải: 0