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Browsing by Author Nguyen, Thi Thom

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  • Preliminary Results of PIXE Analysis of Mosses for Air Pollution Monitoring in Hanoi Using Pelletron Accelerator

    • Authors: Nguyen, The Nghia; Bui, Thi Hoa; Nguyen, Thi Thom; Le, Hong Khiem (2017)

  • Air pollution is a major problem in many cities in Vietnam. The existence of heavy metals in dust particles in the air impacts negatively on human health. There are many different methods to collect dust in the air and analyse the heavy metals concentration. The method using mosses as a biological indicator for monitoring air pollution has been using widely around the world. This paper presents the preliminary results of using moss for analysis of heavy metals in the air in Hanoi by PIXE technique on Pelletron electrostatic accelerator of the VNU, University of Science (HUS).
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  • Screening Streptomycin Resistant Mutations from Gamma Ray Irradiated Bacillus subtilis B5 for Selection of Potential Mutants with high Production of Protease

    • Authors: Tran, Bang Diep; Nguyen, Thi Thom; Hoang, Dang Sang; Hoang, Phuong Thao; Nguyen, Van Binh; Ta, Bich Thuan; Vo, Thi Thuong Lan; Tran, Minh Quynh (2016)

  • The suspensions of Bacillus subtilis B5, a rather high protease production strain, in logarithmic growth phase were irradiated under gamma Cobalt-60 source at Hanoi Irradiation Center. After treatment, the irradiated cells were intermediately cultured in the nutrient agar plates supplemented without and with 20µg/ml streptomycin for screening. The radiation effects on their viability and mutant frequency were studied with radiation dose. The results showed that its survival rate was reduced with the dose as biphasic function. The cells irradiated at dose higher than 1200 Gy do not form colony in the medium containing streptomycin though they could survive in nutrient agar. Therefore...

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Browsing by Author Nguyen, Thi Thom

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 3 of 3
  • 11.pdf.jpg
  • Article

  • Preliminary Results of PIXE Analysis of Mosses for Air Pollution Monitoring in Hanoi Using Pelletron Accelerator

    • Authors: Nguyen, The Nghia; Bui, Thi Hoa; Nguyen, Thi Thom; Le, Hong Khiem (2017)

  • Air pollution is a major problem in many cities in Vietnam. The existence of heavy metals in dust particles in the air impacts negatively on human health. There are many different methods to collect dust in the air and analyse the heavy metals concentration. The method using mosses as a biological indicator for monitoring air pollution has been using widely around the world. This paper presents the preliminary results of using moss for analysis of heavy metals in the air in Hanoi by PIXE technique on Pelletron electrostatic accelerator of the VNU, University of Science (HUS).
  • document(19).pdf.jpg
  • Article

  • Screening Streptomycin Resistant Mutations from Gamma Ray Irradiated Bacillus subtilis B5 for Selection of Potential Mutants with high Production of Protease

    • Authors: Tran, Bang Diep; Nguyen, Thi Thom; Hoang, Dang Sang; Hoang, Phuong Thao; Nguyen, Van Binh; Ta, Bich Thuan; Vo, Thi Thuong Lan; Tran, Minh Quynh (2016)

  • The suspensions of Bacillus subtilis B5, a rather high protease production strain, in logarithmic growth phase were irradiated under gamma Cobalt-60 source at Hanoi Irradiation Center. After treatment, the irradiated cells were intermediately cultured in the nutrient agar plates supplemented without and with 20µg/ml streptomycin for screening. The radiation effects on their viability and mutant frequency were studied with radiation dose. The results showed that its survival rate was reduced with the dose as biphasic function. The cells irradiated at dose higher than 1200 Gy do not form colony in the medium containing streptomycin though they could survive in nutrient agar. Therefore...