Browsing by Subject 16S rDNA

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Showing results 1 to 5 of 5
  • Paper_Hanh_revised.pdf.jpg
  • Article


  • Authors: Nguyen, Thi Hanh; Duong, Van Hop; Nguyen, Hong Minh; Dinh, Thuy Hang (2009-04-24)

  • Via enrichment procedures carried out on a dioxin contaminated sediment sample from lotus pond at Danang airport, a microbial community assigned as DN553 with high capability of carbazol degradation was established. Analyses of community structure by using denaturing gradient gel electrophoresis (DGGE) of 16S rDNA fragments indicated that Achromobacter and Alcaligenes species dominated in this enrichment culture. In addition to carbazol, the enrichment culture was also able to utilize other PAH compounds such as naphthalene and phenanthrene as the only carbon and energy sources. In the presence of different PAH as growth substrates, the community structure changed accordingly, however...

  • document(53).pdf.jpg
  • Article


  • Authors: Nguyen, Bao Trang; Pham, Hong Quynh Anh; Keo, Phommavong; Nguyen, Quang Huy (2016)

  • 61 actinomycete strains were isolated by culture techniques in mangrove forests in Cat Ba, Hai Phong and Xuan Thuy, Nam Dinh. The 31 isolates (50.82%) showed the antibacterial activity with at least one of test microorganisms including Escherichia coli, Staphylococcus aureus, Bacillus subtilis, and Bacillus cereus, in which two strains SCA N2.2 and GI H1.3 had strongest antibacterial activity. Two strains growed at optimal temperature at 37ºC. Strain SCA N2.2 could grow in the medium with 3% NaCl concentration while GI H1.3 strains growed in the medium without NaCl. Based on morphology, color of colony, biological characteristic and 16S rDNA sequence , GI H1.3 strain and SCA N2.2 st...

  • NGHIÊN CỨU ĐA DẠNG VI KHUẨN OXY HÓA Fe (II), khử NO3- TẠI MỘT SỐ MÔI TRƯỜNG SINH THÁI Ở VIỆT NAM.pdf.jpg
  • Article


  • Authors: Nguyễn, Thị Tuyền; Đinh, Thúy Hằng (2009)

  • Fe(II)-oxydizing NO3--reducing bacteria in sediment samples collected from freshwater aquifer, flooded paddy soil and estuarine area were quantified and analysed on species composition. The MPN results showed that among the three studied environments, flooded paddy soil had the highest number of these bacteria (9.3 • 103.g-1), five and two times higher than that of freshwater aquifer and estuarine sediment, respectively. Based on distinguish colony characteristics, 12 strains of Fe(II)-oxidizing, NO3-- reducing bacteria were isolated from MPN series and were set into five genetically different groups as proposed by ARDRA analyses with two restricition enzymes HaeIII and MspI, showing ...

  • Bai bao_Minh_revised.pdf.jpg
  • Article


  • Authors: Nguyen, Hong Minh; Duong, Van Hop; Nguyen, Thi Hanh; Dinh, Thuy Hang (2010)

  • Bacterial community in dioxin contaminated soil and mud samples from Danang airport was enumerated and studied for their potential degradation capability against three-ring compound carbazol. The cell number was determined on nutrient rich medium and on mineral medium supplemented with carbazol. It has been showed that number of cells presented in mud samples was significantly higher than in soil samples, in the range of 1 magnitude order. About 50% of the total cell number in each sample grown on the medium with carbazol. Analyzing 12 representative strains selectively isolated on the carbazol containing medium by using the ARDRA method with two endonucleases HaeIII and MspI showed t...

  • Xạ khuẩn nội sinh Streptomyces parvulus HNR3X4 trên cây bưởi Diễn Hà Nội và tiềm năng sinh tổng hợp chất kháng khuẩn.pdf.jpg
  • Article


  • Authors: Phan, Thị Hồng Thảo; Nguyễn, Vũ Mai Linh; Nguyễn, Thị Hồng Liên; Nguyễn, Kiều Băng Tâm; Nguyễn, Văn Hiếu (2016)

  • Xạ khuẩn nội sinh tồn tại trong mô thực vật có tiềm năng sinh tổng hợp nhiều hoạt chất sinh học quý, trong đó đáng chú ý là các chất kháng khuẩn, có tiềm năng ứng dụng trong công tác bảo vệ thực vật bằng biện pháp sinh học, dần thay thế hóa chất bảo vệ thực vật, giảm thiểu nguy cơ ô nhiễm môi trường và nâng cao chất lượng nông sản. Trong nghiên cứu này, 45 chủng xạ khuẩn nội sinh được phân lập từ các cây bưởi Diễn Hà Nội được nghiên cứu đặc điểm sinh học và khả năng đối kháng với các chủng vi sinh vật kiểm định. Trong số đó, chủng HNR3X4 thể hiện hoạt tính sinh học cao, kháng vi khuẩn Gram âm, Gram dương và một số chủng nấm gây bệnh G. candidum, F. oxysporum và F. udum kiểm định. Xạ k...

Browsing by Subject 16S rDNA

Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or enter first few letters:  
Showing results 1 to 5 of 5
  • Paper_Hanh_revised.pdf.jpg
  • Article


  • Authors: Nguyen, Thi Hanh; Duong, Van Hop; Nguyen, Hong Minh; Dinh, Thuy Hang (2009-04-24)

  • Via enrichment procedures carried out on a dioxin contaminated sediment sample from lotus pond at Danang airport, a microbial community assigned as DN553 with high capability of carbazol degradation was established. Analyses of community structure by using denaturing gradient gel electrophoresis (DGGE) of 16S rDNA fragments indicated that Achromobacter and Alcaligenes species dominated in this enrichment culture. In addition to carbazol, the enrichment culture was also able to utilize other PAH compounds such as naphthalene and phenanthrene as the only carbon and energy sources. In the presence of different PAH as growth substrates, the community structure changed accordingly, however...

  • document(53).pdf.jpg
  • Article


  • Authors: Nguyen, Bao Trang; Pham, Hong Quynh Anh; Keo, Phommavong; Nguyen, Quang Huy (2016)

  • 61 actinomycete strains were isolated by culture techniques in mangrove forests in Cat Ba, Hai Phong and Xuan Thuy, Nam Dinh. The 31 isolates (50.82%) showed the antibacterial activity with at least one of test microorganisms including Escherichia coli, Staphylococcus aureus, Bacillus subtilis, and Bacillus cereus, in which two strains SCA N2.2 and GI H1.3 had strongest antibacterial activity. Two strains growed at optimal temperature at 37ºC. Strain SCA N2.2 could grow in the medium with 3% NaCl concentration while GI H1.3 strains growed in the medium without NaCl. Based on morphology, color of colony, biological characteristic and 16S rDNA sequence , GI H1.3 strain and SCA N2.2 st...

  • NGHIÊN CỨU ĐA DẠNG VI KHUẨN OXY HÓA Fe (II), khử NO3- TẠI MỘT SỐ MÔI TRƯỜNG SINH THÁI Ở VIỆT NAM.pdf.jpg
  • Article


  • Authors: Nguyễn, Thị Tuyền; Đinh, Thúy Hằng (2009)

  • Fe(II)-oxydizing NO3--reducing bacteria in sediment samples collected from freshwater aquifer, flooded paddy soil and estuarine area were quantified and analysed on species composition. The MPN results showed that among the three studied environments, flooded paddy soil had the highest number of these bacteria (9.3 • 103.g-1), five and two times higher than that of freshwater aquifer and estuarine sediment, respectively. Based on distinguish colony characteristics, 12 strains of Fe(II)-oxidizing, NO3-- reducing bacteria were isolated from MPN series and were set into five genetically different groups as proposed by ARDRA analyses with two restricition enzymes HaeIII and MspI, showing ...

  • Bai bao_Minh_revised.pdf.jpg
  • Article


  • Authors: Nguyen, Hong Minh; Duong, Van Hop; Nguyen, Thi Hanh; Dinh, Thuy Hang (2010)

  • Bacterial community in dioxin contaminated soil and mud samples from Danang airport was enumerated and studied for their potential degradation capability against three-ring compound carbazol. The cell number was determined on nutrient rich medium and on mineral medium supplemented with carbazol. It has been showed that number of cells presented in mud samples was significantly higher than in soil samples, in the range of 1 magnitude order. About 50% of the total cell number in each sample grown on the medium with carbazol. Analyzing 12 representative strains selectively isolated on the carbazol containing medium by using the ARDRA method with two endonucleases HaeIII and MspI showed t...

  • Xạ khuẩn nội sinh Streptomyces parvulus HNR3X4 trên cây bưởi Diễn Hà Nội và tiềm năng sinh tổng hợp chất kháng khuẩn.pdf.jpg
  • Article


  • Authors: Phan, Thị Hồng Thảo; Nguyễn, Vũ Mai Linh; Nguyễn, Thị Hồng Liên; Nguyễn, Kiều Băng Tâm; Nguyễn, Văn Hiếu (2016)

  • Xạ khuẩn nội sinh tồn tại trong mô thực vật có tiềm năng sinh tổng hợp nhiều hoạt chất sinh học quý, trong đó đáng chú ý là các chất kháng khuẩn, có tiềm năng ứng dụng trong công tác bảo vệ thực vật bằng biện pháp sinh học, dần thay thế hóa chất bảo vệ thực vật, giảm thiểu nguy cơ ô nhiễm môi trường và nâng cao chất lượng nông sản. Trong nghiên cứu này, 45 chủng xạ khuẩn nội sinh được phân lập từ các cây bưởi Diễn Hà Nội được nghiên cứu đặc điểm sinh học và khả năng đối kháng với các chủng vi sinh vật kiểm định. Trong số đó, chủng HNR3X4 thể hiện hoạt tính sinh học cao, kháng vi khuẩn Gram âm, Gram dương và một số chủng nấm gây bệnh G. candidum, F. oxysporum và F. udum kiểm định. Xạ k...