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Isolation and Characterization of a Antimicrobial Compound from Bacillus coagulans
Emad Abd El-moniem Abada 한국통합생물학회 2008 Animal cells and systems Vol.12 No.1
A bacterium strain called Bacillus coagulans wasisolated from an industrial wastewater drainage andselected for its antimicrobial activities against bacteria andfungi. Characterization studies strongly suggested that thisstrain is Bacilus coagulans . Antimicrobial activity was foundstrain. Maximal activity was observed after 24 h whenincubated at 30oC and pH 8. The activity was found to bestable at 75oC for 30 min and at pH range of 2-12. Analysisof the antimicrobial compound by SDS-PAGE suggested amolecular mass of approximately 7.5 KDa. The substancewas characterized as a bacteriocin, because of its proteinaceousnature and low molecular weight. Our bacteriocin couldpotentially be used as a food preservative, because of its
Wafaa Abd El-Basit,Safaa Mohamed El-Ghanam,Ashraf Mosleh Abdel-Maksood,Sanaa Abd El-Tawab Kamh,Fouad Abd El-Moniem Saad Soliman 한국원자력학회 2016 Nuclear Engineering and Technology Vol.48 No.5
The present paper reports on a trial to shed further light on the characterization, applications, and operation of radar speed guns or Gunn diodes on different radiation environments of neutron or g fields. To this end, theoretical and experimental investigations of microwave oscillating system for outer-space applications were carried out. Radiation effects on the transient parameters and electrical properties of the proposed devices have been studied in detail with the application of computer programming. Also, the oscillation parameters, power characteristics, and bias current were plotted under the influence of different g and neutron irradiation levels. Finally, shelf or oven annealing processes were shown to be satisfactory techniques to recover the initial characteristics of the irradiated devices.
Isolation and Characterization of a Antimicrobial Compound from Bacillus coagulans
Abada, Emad Abd El-moniem The Korean Society for Integrative Biology 2008 Animal cells and systems Vol.12 No.1
A bacterium strain called Bacillus coagulans was isolated from an industrial wastewater drainage and selected for its antimicrobial activities against bacteria and fungi. Characterization studies strongly suggested that this strain is Bacillus coagulans. Antimicrobial activity was found against gram-positive, gram-negative bacteria and yeast strain. Maximal activity was observed after 24 h when incubated at $30^{\circ}C$ and pH 8. The activity was found to be stable at $75^{\circ}C$ for 30 min and at pH range of 2-12. Analysis of the antimicrobial compound by SDS-PAGE suggested a molecular mass of approximately 7.5 KDa. The substance was characterized as a bacteriocin, because of its proteinaceous nature and low molecular weight. Our bacteriocin could potentially be used as a food preservative, because of its thermostable property and broad antimicrobial spectrum.