title: Evaluation of the impact of DNA extraction methods on BAC bacterial community composition measured by denaturing gradient gel electrophoresis.
abstract: OBJECTIVE
  The impact of DNA extraction methods on biological activated carbon (BAC) DNA yield and bacterial community was evaluated.
  
  
  RESULTS
  Three different DNA extraction methods were compared: method a, method b and method c. Method c with ultrasonic pretreatment improved cell lysis efficiency (from 34% to 87%) and DNA yield [from 10.58 μg g⁻¹ (dry wt) of carbon to 21.42 μg g⁻¹ (dry wt) of carbon]. denaturing gradient gel electrophoresis profiles obtained by method c recovered the five seeded bacteria (Bacillus subtilis Strain WSO 6, Pseudomonas putida Strain WSO 7, Acinetobacter lwoffii WSO 10, Pseudomonas pertucinogena WSO 11 and Brevibacterium mcbrellneri WSO 13).
  
  
  CONCLUSIONS
  The results showed method c with ultrasonic pretreatment was the most successful for the analysis of BAC bacterial community because it was effective in the detachment of bacteria and cell lysis, thereby resulting in good yields.
  
  
  CONCLUSIONS
  These results must be taken into consideration when extracting DNA for analysing BAC bacterial community.
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, China.
authors.forename: D
authors.initials: D
authors.lastname: Zhang
authors.forename: W
authors.initials: W
authors.lastname: Li
authors.forename: S
authors.initials: S
authors.lastname: Zhang
authors.forename: M
authors.initials: M
authors.lastname: Liu
authors.forename: H
authors.initials: H
authors.lastname: Gong
mesh_terms: D001419:Bacteria / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification*; D015373:Bacterial Typing Techniques / Q000379:methods; D002606:Charcoal; D004269:DNA, Bacterial / Q000032:analysis / Q000235:genetics / Q000302:isolation & purification*; D058645:Denaturing Gradient Gel Electrophoresis / Q000379:methods*; D017422:Sequence Analysis, DNA; D014465:Ultrasonics / Q000379:methods*
chemical_list: D004269:DNA, Bacterial; D002606:Charcoal