Academia Journal of Biology

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Study on the antagonistic mechanism of some selected fluorescent Pseudomonas strains toward Fusarium oxysporum
Academia Journal of Biology - Tập 28 Số 2 - Trang 77-81 - 2014
Nguyen Thi Tuyet Nhung, Nguyen Minh Anh, Phan Thi Hoai Anh, Nguyen Ngoc Dung
The presence of antifungal agents in 7 selected fluorescent Pseudomonas strains were tested. The obtained results showed that none of them was able to decompose chitin, laminarin and cellulose, but capable to use skim milk. All strains could produce siderophores and cyanid, but there was a difference among them. Only the P. fluorescens strain Ps7-1 showed the presence of phlD, one of 4 genes codin...... hiện toàn bộ
Some characteristics of growth process of longarm mullet (Mugil kelaartii Gunther, 1861) fish in O Loan lagoon, Phu Yen province
Academia Journal of Biology - Tập 32 Số 3 - Trang 7-11 - 2012
Nguyen Thi Phi Loan, Vo Van Phu, Vu Trung Tang
Longarm mullet (Mugil kelaartii) fish in lagoons O Loan, Phu Yen province is a kind of economic species and people can catch them with big production. This fish is a speciality of the locality due to its sweet-smelling and tastiness. At present, aquatic resource in lagoons and inshore zone of Phu Yen province is over-exploiting by destructive means that causes serious declining of Longarm mullet p...... hiện toàn bộ
Canthium simile Merr. & Chun (Rubiaceae), a new species for the flora of Vietnam
Academia Journal of Biology - - 2012
Vu Tien Chinh, Bui Hong Quang, Nguyen The Cuong, Tran The Bach
The genus Canthium Lamk. (Rubiaceae) in the world has about 200 species distributed in tropical, subtropical Asia and Africa. Vietnam has 9 species of this genus [Tran Ngoc Ninh 2005]. During the time to study specimen on this genus in Hanoi herbarium, we found one new species (Canthium Lamk.) for the flora of Vietnam. The species Canthium simile Merr. & Chun has been discoved from the Vu Xuan...... hiện toàn bộ
Effect of neurotoxins from the scorpion venom Lychas mucronatus Fabricius, 1708 on the exitatory nerve
Academia Journal of Biology - - 2015
Hoang Ngoc Anh, G. V. Maximov, B. B. Berezin, I. A. Yamsskov
These neurotoxins decrease the action potential (AP) value depending of the neurotoxin molecular weights (Mw). The AP rate is independent of the neurotoxin Mw indicating the direct influence of the toxins on Na+ and K+ channels located on the Ranhe oversize and no influence on the myelin nerve fibre state. No dependence is observed between the neurotoxin Mw and the threshold excitation of the nerv...... hiện toàn bộ
Influences of the light intensity and the NaCl concentration on the growth of two harmful marine microalgae species Prorocentrum rhathymum and Alexandrium tamarense
Academia Journal of Biology - Tập 28 Số 3 - Trang 43-48 - 2014
Tran Van Tua, Dang Thi Thanh Xuyen, Nguyen Tien Cu, Dang Dinh Kim
In Vietnam, among more than 70 harmful marine microalgae species which have been identified [6], Prorocentrum rhathymum and Alexandruim tamarense were two species of Dinophyta that had a very wide distribution on the coastal waters. This study investigated the influences of the light intensity and the NaCl concentration on the growth of these two isolated species in laboratory conditions. The expe...... hiện toàn bộ
Nghiên cứu về đặc điểm của gen chalcone synthase từ \(\textit{Pueraria lobata}\) và \(\textit{Pueraria mirifica}\) tại Việt Nam Dịch bởi AI
Academia Journal of Biology - Tập 43 Số 3 - Trang 47-58 - 2021
Huynh Thi Thu Hue, Nguyen Minh Phuong, Nguyen Xuan Canh
Hai loài thuộc chi Pueraria ((Pueraria lobata (tên đồng nghĩa: Pueraria montana var. lobata) và Pueraria mirifica (tên đồng nghĩa: Pueraria candollei var. mirifica)) là những cây thuốc cổ truyền đã được sử dụng trong y học từ thời cổ đại. Những cây này đã được sử dụng và trở thành cây thuốc bản địa có giá trị thương mại quan trọng. Hiện nay, cả rễ và hoa của P. mirifica được sử dụng như một thực p...... hiện toàn bộ
#Chalcone synthase #CHS #gene analysis #P.lobata #P.mirifica.
Distribution characteristics of endemic and rare plants along the altitudinal gradient in Bat Xat nature reserve in Vietnam
Academia Journal of Biology - - 2021
Bui Hong Quang, Tran Duc Binh, Do Van Hai, Le Ngoc Han, Duong Thi Hoan, Nguyen Thi Thanh Huong, Vu Anh Thuong, Trinh Ngoc Hiep
This study aimed to assess the relationship between distribution, altitude and investigation lines of vascular plants in Bat Xat Nature Reserve, Lao Cai province. Based on the collected specimens added 273 species of vascular plants belonging to 48 genera, 18 families, bringing the total number the currently known species are 1245 species of vascular plants belonging to 649 genera, 174 families an...... hiện toàn bộ
#Distribution #endemism #rare plants #altitudinal gradient #Bat Xat Nature Reserve #Vietnam
Activity test of antibody recombinant specificity Escherichia coli O157:H7
Academia Journal of Biology - - 2015
Hoang Phu Hiep, Le Thi Kim Xuan, Nguyen Minh Lua, Nguyen Thi Minh Huyen, Tran Manh Ha, Dao Minh Duc, Nguyen Bich Nhi, Le Quang Huan
Antibodies are immunoglobulin molecules which originally are glycoprotein that play role to identify and neutralize foreign agents such as viruses or bacteria. In this study, antibody protein recombine specificity of E. coli O157:H7 which was purified using hybrid methods. Next, antibody activity was tested by the methods as Dot Blot, Western Blot & ELISA. The results showed thatantibody prote...... hiện toàn bộ
#E. coli O157 #H7 #pET28a TRX #recombinant antibodies #nano silica
Cultivation of ginseng (Panax ginseng C. A. Meyer) in bioreactor: role of ethylene on cell growth and ginsenosides production
Academia Journal of Biology - Tập 29 Số 4 - Trang 42-48 - 2014
Nguyen Trung Thanh, Paek Kee Yoeup
cell suspension of Panax ginseng was cultivated in bioreactor under different concentrations of ethylene. The synthesis of saponin was greatly reduced in all the ethylene concentrations compared to control. The cell fresh (320 g/L) and dry weight (12.5 g/L) were increased at 10 ppm ethylene concentration at the experiment end. However, at higher ethylene concentration (20 ppm) the fresh and dry we...... hiện toàn bộ
#ethylene #fresh weight #dry weight #cations #anions #saponin #sugar
Constituents of essential oil from the stem of Schisandra perulata Gagnep. collected in Bat Xat district, Lao Cai province
Academia Journal of Biology - - 2014
Bui Van Thanh, Luu Dam Ngoc Anh, Bui Van Huong, Nguyen Thi Hai
The essential oil extrated from the stem of Schisandra perulata Gagnep. was prepared by steam distillation of fresh materials in a glass for 3h. The essential oil yields was 0.31% from the stem (in absolute dry material). The essential oil from the stem of Schisandra perulata Gagnep. analyzed by GC/MS consists of 45 constituents identified accounting more than 95.21% of the oil. The major componen...... hiện toàn bộ
#Schisandra perulata #essential oil #Lao Cai #Vietnam
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