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Lu B, Jan Hendriks A, Nolte TM. A generic model based on the properties of nanoparticles and cells for predicting cellular uptake. Colloids Surf B Biointerfaces 2022; 209:112155. [PMID: 34678608 DOI: 10.1016/j.colsurfb.2021.112155] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 10/05/2021] [Accepted: 10/06/2021] [Indexed: 10/20/2022]
Abstract
Nanoparticles (NPs) are widely used in industry and technology due to their small size and versatility, which makes them easy to enter organisms and pose threats to human and ecological health. Given the particularity and complex structure of NPs, statistical models alone cannot reliably predict uptake. Hence, we developed a generic model for predicting the cellular uptake of NPs with organic coatings, based on physicochemical interactions underlying uptake. The model utilized the concentration, experimental conditions and properties of NPs viz. size, surface coating and coverage. These parameters were converted to surface energy components and surface potentials, and combined with the components and potential for a cell membrane. For NPs uptake, we constructed energetic profiles and barriers for adsorption and permeation onto/through cell membranes. The relationships derived were compared to experimental uptake data. The model provided accurate and robust uptake estimates for neutrally charged unhalogenated NPs and six different cell types. We envision that the model provides a reference for cellular accumulation of neutral NPs and (ecological/human) risk assessment of NPs or microparticles.
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Affiliation(s)
- Bingqing Lu
- Department of Environmental Science, Institute for Water and Wetland Research, Radboud University Nijmegen, 6500 GL Nijmegen, The Netherlands.
| | - A Jan Hendriks
- Department of Environmental Science, Institute for Water and Wetland Research, Radboud University Nijmegen, 6500 GL Nijmegen, The Netherlands
| | - Tom M Nolte
- Department of Environmental Science, Institute for Water and Wetland Research, Radboud University Nijmegen, 6500 GL Nijmegen, The Netherlands
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2
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Characteristics of bio-desilication and bio-flotation of Paenibacillus mucilaginosus BM-4 on aluminosilicate minerals. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.minpro.2017.09.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3
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Dwyer R, Bruckard WJ, Rea S, Holmes RJ. Bioflotation and bioflocculation review: microorganisms relevant for mineral beneficiation. ACTA ACUST UNITED AC 2013. [DOI: 10.1179/1743285512y.0000000005] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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4
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Elmahdy AM, El-Midany AA, Abdel-Khalek NA, El-Mofty SE. Effect of Oleate/Bacteria Interactions on Dolomite Separation from Phosphate Ore. TENSIDE SURFACT DET 2013. [DOI: 10.3139/113.110039] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
In conventional flotation, the sodium oleate is used as a collector for phosphate separation from silica. However, most of the phosphate deposits contain carbonate impurities, which deteriorate the flotation selectivity using sodium oleate. In this paper, the amenability of the carbonate separation from a sedimentary phosphate ore through bio-flotation process, as a one of various efforts to solve the carbonate problem, was tested. The interaction of two types of bacteria (Corynebacterium-diphtheriae-intermedius, CDI, and Pseudomonas aeruginosa, PA) with sodium oleate was investigated. The interaction between collector and bacteria was determined by Fourier Transform Infra-Red (FTIR) measurements, zeta potential before and after adsorption of bacteria, as well as frothing power. The results showed that bio-flotation could produce a phosphate concentrate of 0.85% MgO and 30.2% P2O5 with a recovery of 92% at pH 5.5, 1.25 kg/t sodium oleate, ≥ 1 × 108 cells of CDI bacteria. The specification of such concentrate could not be obtained by the conventional flotation experiments, in absence of bacteria, under similar conditions. This means that bacteria could play a significant role as a surface modifier due to its selective adsorption onto the mineral surface as well as its interaction with collector.
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Affiliation(s)
- A. M. Elmahdy
- Central Metallurgical Research and Development Institute, P.O. Box 87 Helwan, Cairo, Egypt
| | - A. A. El-Midany
- Dept. of Mining Engineering, Faculty of Engineering, Cairo University, Giza, Egypt
| | - N. A. Abdel-Khalek
- Central Metallurgical Research and Development Institute, P.O. Box 87 Helwan, Cairo, Egypt
| | - S. E. El-Mofty
- Dept. of Mining Engineering, Faculty of Engineering, Cairo University, Giza, Egypt
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Elmahdy A, El-Mofty S, Abdel-Khalek M, Abdel-Khalek N, El-Midany A. Bacterially induced phosphate–dolomite separation using amphoteric collector. Sep Purif Technol 2013. [DOI: 10.1016/j.seppur.2012.09.033] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Adhesion of nano-sized particles to the surface of bacteria: Mechanistic study with the extended DLVO theory. Colloids Surf B Biointerfaces 2012; 97:138-44. [DOI: 10.1016/j.colsurfb.2012.04.031] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Revised: 03/29/2012] [Accepted: 04/17/2012] [Indexed: 12/11/2022]
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7
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Hwang G, Kang S, El-Din MG, Liu Y. Impact of an extracellular polymeric substance (EPS) precoating on the initial adhesion of Burkholderia cepacia and Pseudomonas aeruginosa. BIOFOULING 2012; 28:525-538. [PMID: 22686692 DOI: 10.1080/08927014.2012.694138] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Extracellular polymeric substances (EPS) significantly influence bacterial adhesion to solid surfaces, but it is difficult to elucidate the role of EPS on bacterial adhesion due to their complexity and variability. In the present study, the effect of EPS on the initial adhesion of B. cepaciaepacia PC184 and P. aeruginosa PAO1 on glass slides with and without an EPS precoating was investigated under three ionic strength conditions. The surface roughness of EPS coated slides was evaluated by atomic force microscopy (AFM), and its effect on initial bacterial adhesion was found to be trivial. X-ray photoelectron spectroscopy (XPS) studies were performed to determine the elemental surface compositions of bacterial cells and substrata. The results showed that an EPS precoating hindered bacterial adhesion on solid surfaces, which was largely attributed to the presence of proteins in the EPS. This observation can be attributed to the increased steric repulsion at high ionic strength conditions. A steric model for polymer brushes that considers the combined influence of steric effects and DLVO interaction forces is shown to adequately describe bacterial adhesion behaviors.
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Affiliation(s)
- Geelsu Hwang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, T6G 2W2, Canada
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8
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Farahat M, Hirajima T, Sasaki K. Adhesion of Ferroplasma acidiphilum onto pyrite calculated from the extended DLVO theory using the van Oss–Good–Chaudhury approach. J Colloid Interface Sci 2010; 349:594-601. [DOI: 10.1016/j.jcis.2010.05.091] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Revised: 05/27/2010] [Accepted: 05/28/2010] [Indexed: 10/19/2022]
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9
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Hwang G, Lee CH, Ahn IS, Mhin BJ. Analysis of the adhesion of Pseudomonas putida NCIB 9816-4 to a silica gel as a model soil using extended DLVO theory. JOURNAL OF HAZARDOUS MATERIALS 2010; 179:983-988. [PMID: 20399555 DOI: 10.1016/j.jhazmat.2010.03.101] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2009] [Revised: 03/25/2010] [Accepted: 03/25/2010] [Indexed: 05/29/2023]
Abstract
The extended Derjaguin-Landau-Verwey-Overbeek (DLVO) theory was applied to explain the hydrophobic interaction-mediated adhesion of Pseudomonas putida NCIB 9816-4 to soil. Soil particles are heterogeneous, and it is difficult to define consistent physico-chemical properties such as a contact angle and zeta potential. Hence, a silica gel and a silanized (3-aminopropyltriethoxysilane-coated) silica gel, which showed greater hydrophobicity than the unmodified silica gel, were used as model soils. Gibbs energies for the cell adhesion to the silica gels were calculated with the physico-chemical properties of the microbes and the silica gels and then plotted as a function of the separation distance. The extended DLVO theory successfully explained that the adhesion of P. putida NCIB 9816-4 to the silica gel, a model soil, was primarily caused by hydrophobic interaction.
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Affiliation(s)
- Geelsu Hwang
- Department of Chemical Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemoon-Gu, Seoul 120-749, South Korea
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Heard J, Johnson BB, Wells JD, Angove MJ. Measuring ‘hydrophobicity’ of filamentous bacteria found in wastewater treatment plants. Colloids Surf B Biointerfaces 2009; 72:289-94. [DOI: 10.1016/j.colsurfb.2009.04.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2008] [Revised: 04/01/2009] [Accepted: 04/21/2009] [Indexed: 11/15/2022]
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11
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Steele DF, Moreton RC, Staniforth JN, Young PM, Tobyn MJ, Edge S. Surface energy of microcrystalline cellulose determined by capillary intrusion and inverse gas chromatography. AAPS J 2008; 10:494-503. [PMID: 18841480 PMCID: PMC2761700 DOI: 10.1208/s12248-008-9057-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2008] [Accepted: 07/09/2008] [Indexed: 11/30/2022] Open
Abstract
Surface energy data for samples of microcrystalline cellulose have been obtained using two techniques: capillary intrusion and inverse gas chromatography. Ten microcrystalline cellulose materials, studied using capillary intrusion, showed significant differences in the measured surface energetics (in terms of total surface energy and the acid-base characteristics of the cellulose surface), with variations noted between the seven different manufacturers who produced the microcrystalline cellulose samples. The surface energy data from capillary intrusion was similar to data obtained using inverse gas chromatography with the column maintained at 44% relative humidity for the three samples of microcrystalline cellulose studied. This suggests that capillary intrusion may be a suitable method to study the surface energy of pharmaceutical samples.
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Affiliation(s)
- D. Fraser Steele
- />Pharmaceutical Technology Research Group, Department of Pharmacy & Pharmacology, University of Bath, Bath, BA2 7AY UK
- />Drug Delivery Solutions Ltd, Leatherhead Enterprise Centre, Randalls Rd, Leatherhead, Surrey KT22 7RY UK
| | | | - John N. Staniforth
- />Pharmaceutical Technology Research Group, Department of Pharmacy & Pharmacology, University of Bath, Bath, BA2 7AY UK
| | - Paul M. Young
- />Advanced Drug Delivery Group, University of Sydney, Sydney, NSW 2006 Australia
| | - Michael J. Tobyn
- />Pharmaceutical Technology Research Group, Department of Pharmacy & Pharmacology, University of Bath, Bath, BA2 7AY UK
| | - Stephen Edge
- />Pharmaceutical Technology Research Group, Department of Pharmacy & Pharmacology, University of Bath, Bath, BA2 7AY UK
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Gallardo‐Moreno A, Calzado‐Montero R, González‐Martín M, Pérez‐Giraldo C. Zeta Potential Aspects of Dispersed Solvents Involved in the Determination of Microbial Cell Surface Hydrophobicity. J DISPER SCI TECHNOL 2006. [DOI: 10.1081/dis-200066670] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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13
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Santhiya D, Subramanian S, Natarajan KA. Surface chemical studies on sphalerite and galena using extracellular polysaccharides isolated from Bacillus polymyxa. J Colloid Interface Sci 2002; 256:237-48. [PMID: 12573627 DOI: 10.1006/jcis.2002.8681] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Adsorption, electrokinetic, microflotation, and flocculation studies have been carried out on sphalerite and galena minerals using extracellular polysaccharides (ECP) isolated from Bacillus polymyxa. The adsorption density of ECP onto galena is found to be higher than that onto sphalerite. The adsorption of ECP onto sphalerite is found to increase from pH 3 to about pH 7, where a maximum is attained, and thereafter continuously decreases. With respect to galena, the adsorption density of ECP steadily increases with increased pH. The addition of ECP correspondingly reduces the negative electrophoretic mobilities of sphalerite and galena in absolute magnitude without shifting their isoelectric points. However, the magnitude of the reduction in the electrophoretic mobility values is found to be greater for galena compared to that for sphalerite. Microflotation tests show that galena is depressed while sphalerite is floated using ECP in the entire pH range investigated. Selective flotation tests on a synthetic mixture of galena and sphalerite corroborate that sphalerite could be floated from galena at pH 9-9.5 using ECP as a depressant for galena. Flocculation tests reveal that in the pH range 9-11, sphalerite is dispersed and galena is flocculated in the presence of ECP. Dissolution tests indicate release of the lattice metal ions from galena and sphalerite, while co-precipitation tests confirm chemical interaction between lead or zinc ions and ECP. Fourier transform infrared spectroscopic studies provide evidence in support of hydrogen bonding and chemical interaction for the adsorption of ECP onto galena/sphalerite surfaces.
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Affiliation(s)
- D Santhiya
- Department of Metallurgy, Indian Institute of Science, Bangalore 560 012, India
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14
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Vijayalakshmi S, Raichur A. Bioflocculation of high-ash Indian coals using Paenibacillus polymyxa. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s0301-7516(02)00044-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Phoenix VR, Martinez RE, Konhauser KO, Ferris FG. Characterization and implications of the cell surface reactivity of Calothrix sp. strain KC97. Appl Environ Microbiol 2002; 68:4827-34. [PMID: 12324327 PMCID: PMC126417 DOI: 10.1128/aem.68.10.4827-4834.2002] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The cell surface reactivity of the cyanobacterium Calothrix sp. strain KC97, an isolate from the Krisuvik hot spring, Iceland, was investigated in terms of its proton binding behavior and charge characteristics by using acid-base titrations, electrophoretic mobility analysis, and transmission electron microscopy. Analysis of titration data with the linear programming optimization method showed that intact filaments were dominated by surface proton binding sites inferred to be carboxyl groups (acid dissociation constants [pK(a)] between 5.0 and 6.2) and amine groups (mean pK(a) of 8.9). Sheath material isolated by using lysozyme and sodium dodecyl sulfate generated pK(a) spectra similarly dominated by carboxyls (pK(a) of 4.6 to 6.1) and amines (pK(a) of 8.1 to 9.2). In both intact filaments and isolated sheath material, the lower ligand concentrations at mid-pK(a) values were ascribed to phosphoryl groups. Whole filaments and isolated sheath material displayed total reactive-site densities of 80.3 x 10(-5) and 12.3 x 10(-5) mol/g (dry mass) of cyanobacteria, respectively, implying that much of the surface reactivity of this microorganism is located on the cell wall and not the sheath. This is corroborated by electrophoretic mobility measurements that showed that the sheath has a net neutral charge at mid-pHs. In contrast, unsheathed cells exhibited a stronger negative-charge characteristic. Additionally, transmission electron microscopy analysis of ultrathin sections stained with heavy metals further demonstrated that most of the reactive binding sites are located upon the cell wall. Thus, the cell surface reactivity of Calothrix sp. strain KC97 can be described as a dual layer composed of a highly reactive cell wall enclosed within a poorly reactive sheath.
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Affiliation(s)
- V R Phoenix
- Department of Geology, University of Toronto, Toronto, Ontario M5S 3B1, Canada
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16
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Sharma PK, Rao KH. Analysis of different approaches for evaluation of surface energy of microbial cells by contact angle goniometry. Adv Colloid Interface Sci 2002; 98:341-463. [PMID: 12206199 DOI: 10.1016/s0001-8686(02)00004-0] [Citation(s) in RCA: 251] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Microbial adhesion on solid substrate is important in various fields of science. Mineral-microbe interactions alter the surface chemistry of the minerals and the adhesion of the bacterial cells to mineral surface is a prerequisite in several biobeneficiation processes. Apart from the surface charge and hydrophobic or hydrophilic character of the bacterial cells, the surface energy is a very important parameter influencing their adhesion on solid surfaces. There were many thermodynamic approaches in the literature to evaluate the cells surface energy. Although contact angle measurements with different liquids with known surface tension forms the basis in the calculation of the value of surface energy of solids, the results are different depending on the approach followed. In the present study, the surface energy of 140 bacterial and seven yeast cell surfaces has been studied following Fowkes, Equation of state, Geometric mean and Lifshitz-van der Waals acid-base (LW-AB) approaches. Two independent issues were addressed separately in our analysis. At first, the surface energy and the different components of the surface energy for microbial cells surface are examined. Secondly, the different approaches are evaluated for their internal consistency, similarities and dissimilarities. The Lifshitz-van der Waals component of surface energy for most of the microbial cells is realised to be approximately 40 mJ/m2 +/-10%. Equation of state and Geometric mean approaches do not possess any internal consistency and yield different results. The internal consistency of the LW-AB approach could be checked only by varying the apolar liquid and it evaluates coherent surface energy parameters by doing so. The electron-donor surface energy component remains exactly the same with the change of apolar liquid. This parameter could differentiate between the Gram-positive and Gram-negative bacterial cells. Gram-negative bacterial cells having higher electron-donor parameter had lower nitrogen, oxygen and phosphorous content on their cell surfaces. Among the four approaches, LW-AB was found to give the most consistent results. This approach provides more detailed information about the microbial cell surface and the electron-donor parameter differentiates different type of cell surfaces.
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Affiliation(s)
- P K Sharma
- Division of Mineral Processing, Luleå University of Technology, Sweden
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