The Characteristics of Growth of Bacilli Formed Fouling on Wooden Constructions

Volodyslav Yu. Basarab, O. Voronkova, Y. Voronkova, O. Severynovska
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Abstract

Problem of biofilm formation have a great significance for environmental microbiological research. Biospheric microorganisms can form biofilm, that provide bacteria resistance to influence of different environmental factors. Some of the most common bacteria in biosphere are bacilli, among them there are film-forming strains.Bacillus spp.ia a well-known film forming microorganisms that colonize environmental objects. The biofilm fouling of underwater elements of small wooden constructions located on the Dnieper River near the city of the Dnipro (Ukraine) was studied. It was found that biofilms from surfaces of water constructions include bacilli. It is established that the mean values of CFU in samples from running and still water were (1.81±0.52)×108and (1.83±0.53)×108CFU / ml respectively per area of wooden sample approximately 1 cm2, while during the laboratory cultivation of the film, formed by these cultures on the plate, the number of cells was (4.90±0.93)×107and (4.60±1.07)×107CFU / ml per 1 cm2of the well’s bottom, which was an approximate limit of the content of cells of theBacillus spp.film per unit of area.
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木结构上芽孢结垢的生长特征
生物膜的形成问题对环境微生物学研究具有重要意义。生物圈微生物可以形成生物膜,为细菌提供抵抗不同环境因素影响的能力。生物圈中一些最常见的细菌是杆菌,其中有成膜菌株。芽孢杆菌是一种众所周知的成膜微生物,在环境物体中定居。研究了位于第聂伯河(乌克兰)附近的小型木制建筑的水下部件的生物膜污染。研究发现,水建筑表面的生物膜中含有杆菌。据证实,自来水和静水样品中CFU的平均值分别为(1.81±0.52)×108和(1.83±0.53)×108CFU/ml/面积约1cm2的木制样品,而在实验室培养由这些培养物在平板上形成的膜的过程中,孔底每1cm2的细胞数为(4.90±0.93)×107和(4.60±1.07)×107CFU/ml,这是每单位面积的芽孢杆菌属膜的细胞含量的近似极限。
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International Letters of Natural Sciences
International Letters of Natural Sciences MULTIDISCIPLINARY SCIENCES-
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