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An influence of the qualitative and quantitative composition, phase structure, and the mode of thermal treatment on antimicrobial activity of various phosphorus-containing compounds of some alkaline-earth metals synthesized by co-sedimentation of a metal salt and ammonium hydrophosphate in a solution of ammonium hydroxide has been investigated. The grain size distribution was checked by the laser grain size analysis, which showed that the mean grain size in the materials obtained by the treatment between 400 and 800℃ ranged between 5.48±2.81 and 126.71±3.68 μm. As seen from the sample weight loss analysis, the greatest loss was achieved for the magnesium compounds and became from 3.84±0.13 % (400℃) to 4.13±0.15 % (800℃). Other phosphorus-containing compounds showed weight losses lesser than 3 % (0.36–2.83 %). Antimicrobial activity of the synthesized compounds was tested for different grain sizes against the following reference strains: gram-positive S. aureus АТСС 25923, gram-negative E. coli АТСС 25922, and yeast-like fungi C. albicans ATCC 885-653. Smaller grains showed a greater antimicrobial activity, while all samples proved some retardation in germs proliferation. Possible approaches to the application of the synthesized compounds as antibacterial fillers for the food paper packaging materials are discussed.
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