Microbial adhesion at the oil-water interface is a subject of both basic interest (e.g., as a technique for the measurement of hydrophobicity) and applied interest (e.g., for use in two-phase oil-water mouthwashes for the desorption of oral microorganisms). In general, surfactants inhibit microbial adhesion to oils and other hydrophobic surfaces. In the present study, we demonstrated that the c...

The effects of low-concentration monorhamnolipid (monoRL) on the adsorption of Pseudomonas aeruginosa ATCC 9027 grown on glucose or hexadecane to glass beads with hydrophobic or hydrophilic surfaces was investigated using batch adsorption experiments. Results showed that adsorption isotherms of the cells on both types of glass beads fitted the Freundlich equation better than the Langmuir equati...

objectives in this study, the effect of coating glass and steel surfaces by copper nanoparticles (cunps) in inhibiting the biofilm formation by listeria monocytogenes and pseudomonas aeruginosa was examined. materials and methods the minimal inhibitory concentrations (mics) of synthesized cunps were measured against l. monocytogenes and p. aeruginosa by using the broth-dilution method. the cell...

Pathogenic microorganisms are able to adhere on equipment surfaces, being possible to contaminate food during processing. Salmonella spp. and Listeria monocytogenes are important pathogens that can be transmitted by food, causing severe foodborne diseases. Most surfaces of food processing industry are made of stainless steel joined by welds. However currently, there are few studies evaluating t...

Ultrathin coatings of fluorosilane films for silicon and polydimethylsiloxane PDMS nanochannels are desirable to control the hydrophobicity of the surface and reduce or prevent undesired protein adsorption or cell interactions critical for the performance of most biomedical micro/nanodevices. Surface modifications using vapor-phase deposition become increasingly important for some biomedical na...

The surface hydrophobicity of Klehsiella aerogenes is influenced by the presence of capsular (K) and lipopolysaccharide (0) antigens. Loss of both K and 0 antigens ( K 0 ) , but not the K antigen alone (K-O+), increased surface hydrophobicity and susceptibility to phagocytosis. Unheated serum (i.e., containing complement) increased the surface hydrophobicity and phagocytosis of the K-O+ and K 0...

The pac gene of the serotype c strain Streptococcus mutans MT8148 encodes a cell surface protein antigen (PAc) of approximate 190 kilodaltons. The serotype c strain S. mutans GS-5 does not produce the 190-kilodalton PAc but produces a lower-molecular-weight protein that reacts with anti-PAc serum. The SphI-BamHI fragment of the pac gene was ligated with the S. mutans-Escherichia coli shuttle ve...

The initial adhesion of four Debaryomyces hansenii strains to a solid agarose surface was investigated and correlated with their cell size and some cell surface physicochemical properties, i.e. (i) hydrophobicity and (ii) electron donor/acceptor ability. One strain adhered very poorly, whereas the three other strains were more adhesive. The former strain had a very hydrophilic cell surface, whe...