Cell surface groups of two picocyanobacteria strains studied by zeta potential investigations, potentiometric titration, and infrared spectroscopy

Dittrich, Maria; Sibler, Sabine

doi:10.1016/j.jcis.2005.01.029

Cited by 162 publications

(133 citation statements)

References 44 publications

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“…The total site concentration (dry weight: 1.62 mmol/g; wet weight: 0.24 mmol/g obtained by recalculating to concentration of wet weight of biomass by considering the water content (about 85%) of the biomass before drying) of P. oxalicum biomass at 0.1 mol/L ionic strength (IS) was in accordance with those of Saccharomyces cerevisiae (wet weight: 0.17 mmol/g) [40], Gram-positive bacteria B. subtilis (wet weight: 0.32 mmol/g) [29], and most Gramnegative bacteria reported (dry weight: 0.078-1.66 mmol/g) [31] at the same IS. Although the total site densities are of the same order of magnitude, the distribution of binding groups appeared to be quite different.…”

Section: Discussionsupporting

confidence: 59%

“…Amide bands were found at 1642 cm −1 (amide I band), 1537 cm −1 (amide II band), [30,33]. Symmetric and asymmetric stretching vibrations of P O in nucleic acids were identified at 1040 and 1232 cm −1 [31]. The band near 3300 cm −1 showed the surface hydroxyl groups [30,34].…”

Section: Surface Characteristics Of P Oxalicum Biomassmentioning

confidence: 95%

“…In the region of 2000-1500 cm −1 , the spectra were dominated by the vibration of the peptide backbone [30]. The band at 1747 cm −1 was identified as the C O vibration of carboxylic groups, which is derived primarily from the ester linkage of fatty aliphatic monocarboxylic acids [31,32]. Amide bands were found at 1642 cm −1 (amide I band), 1537 cm −1 (amide II band), [30,33].…”

Section: Surface Characteristics Of P Oxalicum Biomassmentioning

confidence: 99%

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Binding mechanisms and QSAR modeling of aromatic pollutant biosorption on Penicillium oxalicum biomass

Wei

Huang

Yang

et al. 2011

Chemical Engineering Journal

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a b s t r a c tThe biosorption of eight aromatic compounds with different functional groups by Penicillium oxalicum biomass were investigated. The affinity of the biomass for the eight compounds at pH 6.0 follows the following trend: 1-naphthalenamine > naphthol > benzoic acid > p-toluidine > p-cresol > p-toluic acid > phenol > p-toluenesulfonic acid. Biomass surface was characterized, and it was found that four discrete binding sites, corresponding to carboxyl (pK a = 4.0), phosphoric (pK a = 7.0), amine (pK a = 8.8), and hydroxyl groups (pK a = 10.0), were identified on the biomass surface by using the linear programming method (LPM) for the fitting of the titration data and FTIR analysis. The carboxyl and amine groups dominate the biomass surface sites, which might have played an important role in biosorption of organic compounds. Furthermore, the compounds were divided into two groups based on the calculation of ionization degree for toluene derivatives and the comparison on the number of benzene rings for barely ionized compounds. It was found that low ionization degree and high hydrophobicity favor the biosorption for the two groups, respectively. Moreover, a R 2 adj of 0.724 between the log of Freundlich coefficient (log K f ) and log Kow indicated that the hydrophobicity plays role in the sorption of eight organic compounds. The QSAR model with one variable was developed for the first time between log K f and polar surface area (PSA) to predict the biosorption behaviors of organic compounds (R 2 adj = 0.960) except for ptoluenesulfonic acid (with pK a < 0), which also supported the electrostatic attraction and hydrophobicity mechanisms.

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Section: Discussionsupporting

confidence: 59%

Section: Surface Characteristics Of P Oxalicum Biomassmentioning

confidence: 95%

Section: Surface Characteristics Of P Oxalicum Biomassmentioning

confidence: 99%

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Binding mechanisms and QSAR modeling of aromatic pollutant biosorption on Penicillium oxalicum biomass

Wei

Huang

Yang

et al. 2011

Chemical Engineering Journal

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“…The influence of peripheral electronegativity can be assessed based on the measurement of zeta potential ( Figure 10(a)), which is most often determined by estimating the electrophoretic mobility of cells in an electric field [139]. ZPs of many microorganisms have been measured in different physiological states [140], such as for Chlorella (ZP=-17.4 to -19.8 mV, independent of pH from 4-10), diatom Nitzschia (ZP=-28 mV, stationary phase) [141], and Pseudomonas sp. (ZP=-46.9 mV) [140].…”

Section: Antifouling By Changing the Zeta Potentialmentioning

confidence: 99%

“…ZPs of many microorganisms have been measured in different physiological states [140], such as for Chlorella (ZP=-17.4 to -19.8 mV, independent of pH from 4-10), diatom Nitzschia (ZP=-28 mV, stationary phase) [141], and Pseudomonas sp. (ZP=-46.9 mV) [140]. Microorganisms are negatively charged over a large pH range (Figure 10(a)), and in natural sea water (pH 7-8) will carry a negative charge [142].…”

Section: Antifouling By Changing the Zeta Potentialmentioning

confidence: 99%

Progress of marine biofouling and antifouling technologies

et al. 2010

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Microbial Geochemistry: At the Intersection of Disciplines

Bennett

Omelon

2011

Frontiers in Geochemistry

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Subsurface environments support active microbial communities that interact with the geological framework, carrying out redox reactions, assimilating nutrients, excreting waste and extracellular substances. These reactions perturb the extracellular environment, altering mineral -water equilibria, reaction rates and pathways, and are often the chemical basis for low -temperature mineral diagenesis. These complex biologicalmineral interactions represent a coupled system where the microbe takes advantage of specifi c minerals, and the mineral -water reactions depend on a particular microbial population and the activities of the microbial community.We review here the chemistry of microbial interactions with minerals and subsurface environments from the perspective of the microbial metabolism and subsurface microbial ecology. Using example microbe -mineral interactions we examine the driving forces for microbial geochemical interactions and outcomes, with a central theme of asking why a microbe would expend energy to perturb mineral -water equilibria and to drive geochemical reactions. In most cases we fi nd that microorganisms drive geochemical reactions, but that they often gain something from the interaction; access to a nutrient, buffering of extreme habitat conditions, or perhaps protection from predation. Answering the question of why often leads to a richer understanding of how, how fast and how important the microbial geochemical interaction is.

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Cell surface groups of two picocyanobacteria strains studied by zeta potential investigations, potentiometric titration, and infrared spectroscopy

Cited by 162 publications

References 44 publications

Binding mechanisms and QSAR modeling of aromatic pollutant biosorption on Penicillium oxalicum biomass

Binding mechanisms and QSAR modeling of aromatic pollutant biosorption on Penicillium oxalicum biomass

Progress of marine biofouling and antifouling technologies

Microbial Geochemistry: At the Intersection of Disciplines

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