Aspergillus niger grows faster than Escherichia coli in eosin methylene blue media and deter their growth by reducing the pH of the media

Hossain, M. Mahmun; Ali, Md. Idrish

doi:10.5455/jabet.2022.d110

Cited by 3 publications

(3 citation statements)

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“…For both trends, the HD's mean values for all the blends' ratios through the 1st duration (0-800 h) showed a slower duplication rate than those within the 2nd region (800-1400 h). These duplication rates can be noticed from the slop angle of the HD curves, as shown in Figures 15 and 16 [117,118].…”

Section: Bacterial and Fungal Biodegradationmentioning

confidence: 80%

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Fabrication, Characterization, and Microbial Biodegradation of Transparent Nanodehydrated Bioplastic (NDB) Membranes Using Novel Casting, Dehydration, and Peeling Techniques

Hindi

Albureikan

2023

Polymers

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NDBs were fabricated from gum Arabic (GA) and polyvinyl alcohol (PVA) in different ratios using novel techniques (casting, dehydration, and peeling). The GA/PVA blends were cast with a novel vibration-free horizontal flow (VFHF) technique, producing membranes free of air bubble defects with a homogenous texture, smooth surface, and constant thickness. The casting process was achieved on a self-electrostatic template (SET) made of poly-(methyl methacrylate), which made peeling the final product membranes easy due to its non-stick behavior. After settling the casting of the membranous, while blind, the sheets were dried using nanometric dehydration under a mild vacuum stream using a novel stratified nano-dehydrator (SND) loaded with P2O5. After drying the NDB, the dry, smooth membranes were peeled easily without scratching defects. The physicochemical properties of the NDBs were investigated using FTIR, XRD, TGA, DTA, and AFM to ensure that the novel techniques did not distort the product quality. The NDBs retained their virgin characteristics, namely, their chemical functional groups (FTIR results), crystallinity index (XRD data), thermal stability (TGA and DTA), and ultrastructural features (surface roughness and permeability), as well as their microbial biodegradation ability. Adding PVA enhanced the membrane’s properties except for mass loss, whereby increasing the GA allocation in the NDB blend reduces its mass loss at elevated temperatures. The produced bioplastic membranes showed suitable mechanical properties for food packaging applications and in the pharmaceutical industry for the controlled release of drugs. In comparison to control samples, the separated bacteria and fungi destroyed the bioplastic membranes. Pseudomonas spp. and Bacillus spp. were the two main strains of isolated bacteria, and Rhizobus spp. was the main fungus. The nano-dehydration method gave the best solution for the prompt drying of water-based biopolymers free of manufacturing defects, with simple and easily acquired machinery required for the casting and peeling tasks, in addition to its wonderful biodegradation behavior when buried in wet soil.

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Section: Bacterial and Fungal Biodegradationmentioning

confidence: 80%

“…showed a slower duplication rate than those within the 2nd region (800–1400 h). These duplication rates can be noticed from the slop angle of the HD curves, as shown in Figure 15 and Figure 16 [ 117 , 118 ].…”

Section: Resultsmentioning

confidence: 99%

Fabrication, Characterization, and Microbial Biodegradation of Transparent Nanodehydrated Bioplastic (NDB) Membranes Using Novel Casting, Dehydration, and Peeling Techniques

Hindi

Albureikan

2023

Polymers

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“…In the past ten years, there has been a rise in awareness of the role of street food that plays in a number of issues related to public health and hygiene [18]. Perhaps the area that has attracted the most attention and gained the greatest understanding is how these street foods contribute to the spread and acquisition of food-borne diseases.…”

Section: Discussionmentioning

confidence: 99%

Bacterial risk evaluation of widely consumed fast foods by the younger population in Bangladesh and its potential health effects

Masud,

Hossain,

Faruk

et al. 2023

Preprint

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Food-borne illness is a significant public health concern in Bangladesh, especially among the younger generation. They often consume spicy street foods, such as Fusca, Hog plum bedfellow, and Chotpoti. These foods can be contaminated with harmful bacteria, which can cause various diseases, including diarrhea, cholera, and dysentery. This study investigated the microbiological quality of three commonly consumed street foods in Bangladesh. We collected samples of Fusca, Hog plum bedfellow, and Chotpoti from different vendors in Dhaka and analyzed them in a laboratory. We found that all three of the food samples were contaminated with a variety of bacteria, including Bacillus spp., Haemophilus spp., Salmonella spp., Klebsiella spp., Staphylococcus spp., and Streptococcus spp. Some of these bacteria, such as Haemophilus spp., were resistant to the antibiotic ciprofloxacin. Our findings suggest that there is a high risk of food-borne illness associated with the consumption of street foods in Bangladesh. We urge vendors and consumers to take steps to improve food safety, such as proper food handling and cooking and clean water and utensils.

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Fabrication, Characterization, and Microbial Biodegradation of Transparent Nanodehydrated-Bioplastic (NDBs) Membranes Using Novel Casting, Dehydration, and Peeling Techniques

Hindi¹,

Albureikan²

2023

Preprint

View full text Add to dashboard Cite

NDBs were fabricated from gum arabic (GA) and polyvinyl alcohol (PVA) in different ratios using novel techniques (casting, dehydration, and peeling). The GA/PVA blends were cast with a novel vibration-free horizontal flow (VFHF) technique, producing membranes free of air bubble defects with a homogenous texture, smooth surface, and constant thickness. The casting process was achieved on a self-electrostatic template (SET) made of poly-(methyl methacrylate), which made peeling the final product membranes easy due to its non-stick behavior. After settling of the cast membranous blind, sheets were dried using nanometric dehydration under a mild vacuum stream using a novel stratified nanodehydrator (SND) loaded with P2O5. After drying the TBM, the dry, smooth membranes were peeled easily without scratching defects. The physicochemical properties of the NDBs were investigated using FTIR, XRD, TGA, DTA, and AFM to ensure that the novel techniques did not distort the product quality. The NDBs retained their virgin characteristics, namely, their chemical functional groups (FTIR results), crystallinity index (XRD data), thermal stability (TGA and DTA), and ultrastructural features (surface roughness and permeability), as well as their microbial biodegradation ability. Comparing the two TBM’ s precursors, PVA had a higher crystallinity index (CI), more mass loss at higher temperatures, greater thermal stability due to higher heat resistance, and a higher clearance of surface roughness due to its large particle size (PS), as well as its higher permeability parameters, namely pore diameter (PD) and void volume (VV), than those for GA. Accordingly, increasing the PVA allocation in the bioplastic blends can enhance their properties except for mass loss, whereby increasing the GA allocation in the TBM blend reduces its mass loss at an elevated temperature. In addition, there is no statistical difference between the NDBs and ordinary air-dried NDBs in PS, PD, and VV, indicating that the novel procedures used did not distort their parent properties examined, as well as their ability for biodegradation. In comparison to control samples, the separated bacteria and fungus destroyed the NDBs. Pseudomonas spp. and Bacillus spp. were the two main strains of isolated bacteria, and Rhizobus spp. was the main fungus. The nanodehydration method gave the best solution for the prompt drying of water-based biopolymers free of manufacturing defects, with simple and easily acquired machinery required for the casting and peeling tasks, in addition to its wonderful biodegradation behavior when buried in wetted soil.

show abstract

Aspergillus niger grows faster than Escherichia coli in eosin methylene blue media and deter their growth by reducing the pH of the media

Cited by 3 publications

References 0 publications

Fabrication, Characterization, and Microbial Biodegradation of Transparent Nanodehydrated Bioplastic (NDB) Membranes Using Novel Casting, Dehydration, and Peeling Techniques

Fabrication, Characterization, and Microbial Biodegradation of Transparent Nanodehydrated Bioplastic (NDB) Membranes Using Novel Casting, Dehydration, and Peeling Techniques

Bacterial risk evaluation of widely consumed fast foods by the younger population in Bangladesh and its potential health effects

Fabrication, Characterization, and Microbial Biodegradation of Transparent Nanodehydrated-Bioplastic (NDBs) Membranes Using Novel Casting, Dehydration, and Peeling Techniques

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