characterized were gram-rod bacteria. While the H 2 S and indole production was also
negative. The test for fermentation was positive for citrate, sorbitol alanine, fructose,
glycerol, sucrose, and glucose. However, the factors surrounding the coloration
could not be found but the UV zone absorbed some radiation and form ferric chloride
precipitate. The results from the scanning electron microscope exposed some depression that were linked to the potential breakdown of the plastic by the Serratia
marcescens. The plane surface of films in the control without the introduction of
Serratia marcescens was shown by the micrographs. The results of the glass
transition temperature (Tg) of the undegraded and graded plastics as confirmed by
the DSC (differential scanning calorimetry) were 63.33 and 52.43
C, respectively,
indicating an increase of the rate of movement small chain length formed after the
biodegradation of the plastics. More so, the measurement of the differential scanning
calorimetry in addition revealed the crystallization enthalpy (AH) before and after to
be 89.936 and 31.945 J/g respectively. A reduction was spotted in the crystallization
temperature and enthalpy of crystallization to be 118.980–112.25
C and (À) 83.241
to (À) 34.776 J/g respectively. The findings from their study showed that the
Differential Scanning Calorimetry was able to indicate the relationship of reduction
between crystallinity and the biodegradation procedures.
Muhonja et al. (2018) isolated, tested, and evaluated the degradation potential of
fungi and bacteria isolates from a specific dumpsite in Kenya in degrading polyethylene. The results of the FTIR (Fourier transform infrared) spectroscopy analysis
showed the presence of new-fangled clusters accredited to the degradation of
hydrocarbon by the consortia of fungi and after incubation. The results of the
evaluation of the 18S rDNA and 16S rDNA sequence of the fungi and bacteria,
revealed that the fungi belong to the genus Aspergillus, while the bacteria belong to
the genus Lysinibacillus, Cellulosimicrobium, Brevibacillus, Bacillus, and Pseudomonas were connected as degraders of polyethylene. Further analysis of their results
showed that the bacteria were poor degrader when compared with their counterparts;
fungi which were better degraders. It was observed from their study that the highest
mean from the fungi reduction activity was 36.4 Æ 5.53% linked to strain A5,
1 MG779508 (Aspergillus oryzae). While for the bacteria, strain B2, 2 MG645267
(Brevibacillus borstelensis) and strain A5, a MG645264 (Bacillus cereus) had the
highest mean a values of 20.28 Æ 2.30% and 35.72 Æ 4.01% respectively. The
results of the LDP (low-density polyethene) degradation, established that
Brevibacillus, Bacillus, and Aspergillus were good degrader contenders among the
other strains. This findings was in advance established by the presence of carboxyl
efficient clusters, ether and aldehyde after the Fourier transform infrared (FTIR)
spectroscopy analysis of the ketone; and intercessor culture media product and the
polythene pieces. In conclusion, the authors suggested the application of the findings
from their study into large-scale and commercial purposes.
368
C. O. Adetunji and O. A. Anani
negative. The test for fermentation was positive for citrate, sorbitol alanine, fructose,
glycerol, sucrose, and glucose. However, the factors surrounding the coloration
could not be found but the UV zone absorbed some radiation and form ferric chloride
precipitate. The results from the scanning electron microscope exposed some depression that were linked to the potential breakdown of the plastic by the Serratia
marcescens. The plane surface of films in the control without the introduction of
Serratia marcescens was shown by the micrographs. The results of the glass
transition temperature (Tg) of the undegraded and graded plastics as confirmed by
the DSC (differential scanning calorimetry) were 63.33 and 52.43
C, respectively,
indicating an increase of the rate of movement small chain length formed after the
biodegradation of the plastics. More so, the measurement of the differential scanning
calorimetry in addition revealed the crystallization enthalpy (AH) before and after to
be 89.936 and 31.945 J/g respectively. A reduction was spotted in the crystallization
temperature and enthalpy of crystallization to be 118.980–112.25
C and (À) 83.241
to (À) 34.776 J/g respectively. The findings from their study showed that the
Differential Scanning Calorimetry was able to indicate the relationship of reduction
between crystallinity and the biodegradation procedures.
Muhonja et al. (2018) isolated, tested, and evaluated the degradation potential of
fungi and bacteria isolates from a specific dumpsite in Kenya in degrading polyethylene. The results of the FTIR (Fourier transform infrared) spectroscopy analysis
showed the presence of new-fangled clusters accredited to the degradation of
hydrocarbon by the consortia of fungi and after incubation. The results of the
evaluation of the 18S rDNA and 16S rDNA sequence of the fungi and bacteria,
revealed that the fungi belong to the genus Aspergillus, while the bacteria belong to
the genus Lysinibacillus, Cellulosimicrobium, Brevibacillus, Bacillus, and Pseudomonas were connected as degraders of polyethylene. Further analysis of their results
showed that the bacteria were poor degrader when compared with their counterparts;
fungi which were better degraders. It was observed from their study that the highest
mean from the fungi reduction activity was 36.4 Æ 5.53% linked to strain A5,
1 MG779508 (Aspergillus oryzae). While for the bacteria, strain B2, 2 MG645267
(Brevibacillus borstelensis) and strain A5, a MG645264 (Bacillus cereus) had the
highest mean a values of 20.28 Æ 2.30% and 35.72 Æ 4.01% respectively. The
results of the LDP (low-density polyethene) degradation, established that
Brevibacillus, Bacillus, and Aspergillus were good degrader contenders among the
other strains. This findings was in advance established by the presence of carboxyl
efficient clusters, ether and aldehyde after the Fourier transform infrared (FTIR)
spectroscopy analysis of the ketone; and intercessor culture media product and the
polythene pieces. In conclusion, the authors suggested the application of the findings
from their study into large-scale and commercial purposes.
368
C. O. Adetunji and O. A. Anani