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Cowan MM, Van der Mei HC, Stokroos I, Busscher HJ. Heterogeneity of Surfaces of Subgingival Bacteria as Detected by Zeta Potential Measurements. J Dent Res 2016; 71:1803-6. [PMID: 1357016 DOI: 10.1177/00220345920710110701] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Porphyromonasgingivalis, Prevotella intermedia, and Actinobacillus actinomycetemcomitans (A.a.) are Gram-negative bacteria which are implicated in various forms of periodontal disease. The Gram-positive Peptostreptococcus micros may also play an important role. For investigation of the possible adhesion and colonization mechanisms of these organisms, the charge properties of the outermost layers of bacterial cell surfaces were studied through the measurement of zeta potentials at various pH values. Eleven fresh clinical isolates, representing the four species, and one laboratory strain, P. gingivalis W83, were examined. Eleven of the 12 strains displayed heterogeneity with respect to pH-dependent zeta potentials. Within single cultures of each of these strains, two distinct populations of cells were found, one which was more negatively charged than the other. For the Gram-negative strains, the more negatively charged subpopulation was in the majority, while the P. micros strains appeared to be composed mainly of a less-negatively-charged subpopulation. Vesicles prepared from two strains displayed the same pH dependence and heterogeneity of zeta potentials as the parent cells. An A.a. strain which was passaged several times in fluid medium had lost its fimbriae and became homogeneous with respect to charge.
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Affiliation(s)
- M M Cowan
- Laboratory for Materia Technica, University of Groningen, The Netherlands
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Speers RA, Tung MA, Durance TD, Stewart GG. BIOCHEMICAL ASPECTS OF YEAST FLOCCULATION AND ITS MEASUREMENT: A REVIEW. JOURNAL OF THE INSTITUTE OF BREWING 2013. [DOI: 10.1002/j.2050-0416.1992.tb01111.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Determination of the electrokinetic potential of Rhizobium leguminosarum bv trifolii Rt24.2 using Laser Doppler Velocimetry — A methodological study. J Microbiol Methods 2011; 85:199-205. [DOI: 10.1016/j.mimet.2011.03.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Revised: 03/03/2011] [Accepted: 03/03/2011] [Indexed: 11/23/2022]
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Ahimou F, Boonaert CJP, Adriaensen Y, Jacques P, Thonart P, Paquot M, Rouxhet PG. XPS analysis of chemical functions at the surface of Bacillus subtilis. J Colloid Interface Sci 2007; 309:49-55. [PMID: 17316673 DOI: 10.1016/j.jcis.2007.01.055] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2006] [Revised: 01/05/2007] [Accepted: 01/10/2007] [Indexed: 11/26/2022]
Abstract
The surface chemical composition of nine strains of Bacillus subtilis was determined by X-ray photoelectron spectroscopy. Regressions between elemental concentrations and concentrations associated with different components of C1s, N1s, and O1s peaks provided a more precise validation of the procedure used for peak decomposition and allowed the assignment of the peak components to be completed or strengthened. The component of the O1s peak appearing around 531.2 eV was shown to contain a contribution of oxygen from phosphate groups (PO, PO-), the other contribution being due to oxygen involved in amide functions. The surface negative charge may be fully attributed to phosphate groups, despite the observation of two types of zeta potential vs pH curves. The strains exhibiting a sharp variation of the zeta potential (range of -35 to -55 mV) between pH 2 and 4.7 were characterized by a high phosphate surface concentration and by an excess (about 25%) of phosphate with respect to the sum of potassium, an exchangeable cation, and protonated nitrogen, attributed to protein or to alanine involved in teichoic acids.
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Affiliation(s)
- François Ahimou
- Unité de Chimie Biologique Industrielle, Faculté Universitaire des Sciences Agronomiques de Gembloux, Passage des Déportés 2, B-5030 Gembloux, Belgium
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Chang YI, Shih LH, Chen SW. Effects of glucose and mannose on the flocculation behavior of Saccharomyces cerevisiae at different life stages. Colloids Surf B Biointerfaces 2005; 44:6-14. [PMID: 15979857 DOI: 10.1016/j.colsurfb.2005.05.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2005] [Revised: 04/30/2005] [Accepted: 05/23/2005] [Indexed: 11/19/2022]
Abstract
The temporal flocculation behavior of Saccharomyces cerevisiae at different life stages is investigated using glucose and mannose as the different carbon sources, and the temporal variations of cell size, zeta potential and stability ratio of cell suspension are measured. It is found that the largest cell size and the lowest stability ratio of cell suspension occurred at the middle period of the exponential growth phase independent of carbon sources. The colloidal aspect was analyzed by using the DLVO theory, and indicated that the gravitational force plays a major role in determining the flocculation behavior of yeast cells.
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Affiliation(s)
- You-Im Chang
- Department of Chemical Engineering, Tunghai University, Taichung 40704, Taiwan, ROC.
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Saccharomyces cerevisiae entrapped in chrysotile increases life-span for up to 3 years. Colloids Surf B Biointerfaces 2003. [DOI: 10.1016/s0927-7765(03)00099-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Senée J, Robillard B, Vignes-Adler M. The ζ-potential of the endogenous particles of a wine of Champagne in relation to the foaming behaviour. Colloids Surf B Biointerfaces 2001; 21:59-67. [PMID: 11377935 DOI: 10.1016/s0927-7765(01)00184-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
It was shown that the endogenous particles of the champagnes influence the lifetime, and not the maximum expansion of their evanescent foam (Food Hydrocolloids (1999) 12, 217-226). Actually, champagnes are electrolytic solutions with pH 3 and ionic strength equal to 0.02 mol/l in which bentonites, diatomites, and yeast cells are the more numerous colloids and particles present. In this context, we have investigated the electrophoretic properties of these particles to determine whether they can electrostatically interact with the foam bubbles. Results are that in model alcoholic solutions of proteins at same pH and ionic strength as the champagne, the zeta-potential was not vanishing whereas it dropped down to zero in wines. The zeta-potential of the particles does not vanish either when they are suspended in nanofiltered wines on molecular weight cut-off membrane (porosity=200-300 Da) or when the wines are basified upon addition of sodium hydroxide. This particular behaviour was tentatively assigned to the adsorption of some endogenous organic cationic ions on the particle surfaces, which screened out their electrostatic charge. The possible candidates are discussed.
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Affiliation(s)
- J Senée
- Laboratoire de Physique des Matériaux Divisés et des Interfaces, Université de Marne-la-Vallée, Cité Descartes, F-77454 Cedex 2, Marne-la-Vallee, France
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Senée J, Viaux L, Robillard B, Duteurtre B, Vignes-Adler M. The endogenous particles of a sparkling wine and their influence on the foaming behaviour. Food Hydrocoll 1998. [DOI: 10.1016/s0268-005x(98)00033-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dufrêne YF, Rouxhet PG. Surface composition, surface properties, and adhesiveness ofAzospirillum brasilense—variation during growth. Can J Microbiol 1996. [DOI: 10.1139/m96-074] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The surface chemical composition, the physicochemical properties, and the adhesiveness of Azospirillum brasilense have been investigated during growth in Luria–Bertani* rich medium. The surface elemental composition obtained by X-ray photoelectron spectroscopy was converted into a molecular composition in terms of model constituents: proteins, polysaccharides, and hydrocarbon-like compounds. The protein content increased during growth, from 30 (exponential phase cells) to 50% (stationary phase cells), concomitantly with a decrease in the polysaccharide content, from 60 to 35%. These modifications were related to a change in cell surface hydrophobicity, i.e., to an increase of the water contact angle from 20 to 60°. No difference of electrophoretic mobility was detected between cells harvested in the exponential phase and cells harvested in the stationary phase. The increase of both cell surface protein concentration and cell surface hydrophobicity during growth was correlated with an increase of cell adhesiveness to model supports. This points to the involvement of cell surface proteins and cell surface hydrophobicity in the adhesion process.Key words: Azospirillum brasilense, surface composition, hydrophobicity, adhesiveness, X-ray photoelectron spectroscopy.
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Gitter B, Hummel A, Glombitza F. Influence of relA locus on electrophoretic mobility of a stringent/relaxed Escherichia coli K 12 strain pair. Microbiol Res 1996; 151:99-103. [PMID: 8857269 DOI: 10.1016/s0944-5013(96)80063-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Stringent (relA+) and relaxed (rel A-) controlled Escherichia coli cells differ in their regulation of many biochemical pathways such as phospholipid and lipopolysaccharide metabolism (LPS) after amino acid limitation. Because such differences could result in various cell envelopes, cells of stringent controlled E. coli strain CP78 (relA+) and relaxed controlled E. coli strain CP79 (relA) were studied regarding their electrophoretic mobility. The graphs of the mobility distributions of both strains were different: cells of strain CP79 caused secondary peaks in addition to the main peaks whereas the mobility distributions of cells of strain CP78 showed only one maximum. In the pH range from 6.0 to 8.0 the location of the main peaks of cells of strain CP79 were changed to less negative values after induction of relaxed response. In contrast to this the stringent response in strain CP78 caused no change of the mobility distributions.
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Affiliation(s)
- B Gitter
- Hans-Knoll-Institut fur Naturstoff-Forschung e. V., Jena, Federal Republic of Germany
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Dengis PB, Gerin PA, Rouxhet PG. X-ray photoelectron spectroscopy analysis of biosurfaces: examination of performances with yeast cells and related model compounds. Colloids Surf B Biointerfaces 1995. [DOI: 10.1016/0927-7765(94)01171-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Achouak W, Thomas F, Heulin T. Physico-chemical surface properties of rhizobacteria and their adhesion to rice roots. Colloids Surf B Biointerfaces 1994. [DOI: 10.1016/0927-7765(94)80060-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Influence of medium composition on surface properties and aggregation of a Saccharomyces cerevisiae strain. Colloids Surf B Biointerfaces 1994. [DOI: 10.1016/0927-7765(93)01113-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Latrache H, Mozes N, Pelletier C, Bourlioux P. Chemical and physicochemical properties of Escherichia coli: variations among three strains and influence of culture conditions. Colloids Surf B Biointerfaces 1994. [DOI: 10.1016/0927-7765(94)80017-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Nordström KM, Mozes N. Analysis of wild-type and plasmid-cured Thermus spp. by X-ray photoelectron spectroscopy. Colloids Surf B Biointerfaces 1994. [DOI: 10.1016/0927-7765(94)80019-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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van Hamersveld E, van Loosdrecht M, Luyben K. How important is the physicochemical interaction in the flocculation of yeast cells? Colloids Surf B Biointerfaces 1994. [DOI: 10.1016/0927-7765(94)80031-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Rouxhet P, Mozes N, Dengis P, Dufrêne Y, Gerin P, Genet M. Application of X-ray photoelectron spectroscopy to microorganisms. Colloids Surf B Biointerfaces 1994. [DOI: 10.1016/0927-7765(94)80049-9] [Citation(s) in RCA: 87] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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The relevance of X-ray photoelectron spectroscopy for analysis ofmicrobial cell surfaces: a critical view. Colloids Surf B Biointerfaces 1994. [DOI: 10.1016/0927-7765(94)80050-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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