图共 8个 表共 4
    • 图  1  菌株CQ2形态观察(a)菌落形态;(b)菌体形态

      Figure 1.  Morphology of strain CQ2: (A) colony; (B) cell shape

    • 图  2  基于16S rDNA序列同源性构建的菌株CQ2和亲缘性相近的其他细菌的系统发育树

      Figure 2.  Phylogenetic position of CQ2 based on 16s rDNA sequences analyses

    • 图  3  CQ2菌微生物生长曲线及CX降解曲线

      Figure 3.  Growth curve and degradation curve of CQ2 bacteria

    • 图  4  温度对微生物生长及CX降解效果的影响

      Figure 4.  Effects of temperature on microbial growth and CX degradation

    • 图  5  pH对微生物生长及CX降解效果的影响

      Figure 5.  Effects of pH on microbial growth and CX degradation

    • 图  6  转速对微生物生长及CX降解效果的影响

      Figure 6.  Effect of rotation speed on microbial growth and CX degradation

    • 图  7  接种量对微生物生长及CX降解效果的影响

      Figure 7.  Effects of inoculation amount on microbial growth and CX degradation

    • 图  8  CQ2菌生物降解CX的初步途径

      Figure 8.  Preliminary biodegradation of CX by CQ2 bacteria

    • StrainConcentration of CX/(mg·L−1
      1510
      Growth conditionsRemoval rate of CXGrowth conditionsRemoval rate of CXGrowth conditionsRemoval rate of CX
      CQ1+++++++
      CQ2++++++++++++
      CQ3++++++++

      表 1  菌落生长及CX降解状况

      Table 1.  Colony growth and CX degradation

    • StrainDescriptionGram stainIdentification result
      CQ1Round colonies, irregular edges, moist, dull, translucentNegativeSphingomonas sp.
      CQ2Round colonies, neat edges, moist, dull, pale yellowNegativeOchrobactrum sp.
      CQ3Round colonies, neat edges, glossy, orangeNegativeOchrobactrum sp.

      表 2  三株高效菌的形态学观察和鉴定结果

      Table 2.  Morphological observation and identification results of three highly effective strains

    • Parameters ValueCX distribution at different pH values
      NameCX(Cephalexin)
      Chemical formulaC16H17N3O4S
      Molecular weight347.39
      CAS number15686-71-2
      pH(5 g·L−13.5~5.5
      IC50/μg·mL−156.38

      表 3  CX理化性质

      Table 3.  Physicochemical properties of cephalexin

    • Antibiotic speciesAmoxicillinTerramycinSulfadiazinePefloxacin
      OD6001.2980.9860.4120.027
      Antibiotic removal rate/%100.0062.3450.295.12

      表 4  CQ2菌对其他类抗生素去除率

      Table 4.  The removal rate of CQ2 bacteria to other antibiotics