1
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Hennebelle M, Villeneuve P, Durand E, Lecomte J, van Duynhoven J, Meynier A, Yesiltas B, Jacobsen C, Berton-Carabin C. Lipid oxidation in emulsions: New insights from the past two decades. Prog Lipid Res 2024; 94:101275. [PMID: 38280491 DOI: 10.1016/j.plipres.2024.101275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/19/2024] [Accepted: 01/22/2024] [Indexed: 01/29/2024]
Abstract
Lipid oxidation constitutes the main source of degradation of lipid-rich foods, including food emulsions. The complexity of the reactions at play combined with the increased demand from consumers for less processed and more natural foods result in additional challenges in controlling this phenomenon. This review provides an overview of the insights acquired over the past two decades on the understanding of lipid oxidation in oil-in-water (O/W) emulsions. After introducing the general structure of O/W emulsions and the classical mechanisms of lipid oxidation, the contribution of less studied oxidation products and the spatiotemporal resolution of these reactions will be discussed. We then highlight the impact of emulsion formulation on the mechanisms, taking into consideration the new trends in terms of emulsifiers as well as their own sensitivity to oxidation. Finally, novel antioxidant strategies that have emerged to meet the recent consumer's demand will be detailed. In an era defined by the pursuit of healthier, more natural, and sustainable food choices, a comprehensive understanding of lipid oxidation in emulsions is not only an academic quest, but also a crucial step towards meeting the evolving expectations of consumers and ensuring the quality and stability of lipid-rich food products.
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Affiliation(s)
- Marie Hennebelle
- Laboratory of Food Chemistry, Department of Agrotechnology and Food Sciences, Wageningen University, Wageningen, Netherlands.
| | - Pierre Villeneuve
- CIRAD, UMR Qualisud, Montpellier F34398, France; Qualisud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, IRD, Université de La Réunion, Montpellier, France
| | - Erwann Durand
- CIRAD, UMR Qualisud, Montpellier F34398, France; Qualisud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, IRD, Université de La Réunion, Montpellier, France
| | - Jérôme Lecomte
- CIRAD, UMR Qualisud, Montpellier F34398, France; Qualisud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, IRD, Université de La Réunion, Montpellier, France
| | - John van Duynhoven
- Laboratory of Biophysics, Wageningen University & Research, Wageningen, the Netherlands; Unilever Food Innovation Centre, Wageningen, the Netherlands
| | | | - Betül Yesiltas
- Research group for Bioactives - Analysis and Application, Technical University of Denmark, National Food Institute, Kgs. Lyngby DK-2800, Denmark
| | - Charlotte Jacobsen
- Research group for Bioactives - Analysis and Application, Technical University of Denmark, National Food Institute, Kgs. Lyngby DK-2800, Denmark
| | - Claire Berton-Carabin
- INRAE, UR BIA, Nantes 44300, France; Laboratory of Food Process Engineering, Department of Agrotechnology and Food Sciences, Wageningen University, Wageningen, Netherlands
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2
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Sakaya A, Bacellar IOL, Fonseca JL, Durantini AM, McCain J, Xu L, Vignoni M, Thomas AH, Baptista MS, Cosa G. Singlet Oxygen Flux, Associated Lipid Photooxidation, and Membrane Expansion Dynamics Visualized on Giant Unilamellar Vesicles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:442-452. [PMID: 36576408 DOI: 10.1021/acs.langmuir.2c02720] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The physical properties of lipid membranes depend on their lipid composition. Photosensitized singlet oxygen (1O2) provides a handle to spatiotemporally control the generation of lipid hydroperoxides via the ene reaction, enabling fundamental studies on membrane dynamics in response to chemical composition changes. Critical to relating the physical properties of the lipid membrane to hydroperoxide formation is the availability of a sensitive reporter to quantify the arrival of 1O2. Here, we show that a fluorogenic α-tocopherol analogue, H4BPMHC, undergoes a >360-fold emission intensity enhancement in liposomes following a reaction with 1O2. Rapid quenching of 1O2 by the probe (kq = 4.9 × 108 M-1 s-1) ensures zero-order kinetics of probe consumption. The remarkable intensity enhancement of H4BPMHC upon 1O2 trapping, its linear temporal behavior, and its protective role in outcompeting membrane damage provide a sensitive and reliable method to quantify the 1O2 flux on lipid membranes. Armed with this probe, fluorescence microscopy studies were devised to enable (i) monitoring the flux of photosensitized 1O2 into giant unilamellar vesicles (GUVs), (ii) establishing the onset of the ene reaction with the double bonds of monounsaturated lipids, and (iii) visualizing the ensuing collective membrane expansion dynamics associated with molecular changes in the lipid structure upon hydroperoxide formation. A correlation was observed between the time for antioxidant H4BPMHC consumption by 1O2 and the onset of membrane fluctuations and surface expansion. Together, our imaging studies with H4BPMHC in GUVs provide a methodology to explore the intimate relationship between photosensitizer activity, chemical insult, membrane morphology, and its collective dynamics.
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Affiliation(s)
- Aya Sakaya
- Department of Chemistry and Quebec Center for Applied Materials (QCAM), McGill University, 801 Sherbrook Street West, Montreal, QuebecH3A 0B8, Canada
| | - Isabel O L Bacellar
- Department of Chemistry and Quebec Center for Applied Materials (QCAM), McGill University, 801 Sherbrook Street West, Montreal, QuebecH3A 0B8, Canada
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, São Paulo, São PauloCEP 05508-000, Brazil
| | - José Luis Fonseca
- Department of Chemistry and Quebec Center for Applied Materials (QCAM), McGill University, 801 Sherbrook Street West, Montreal, QuebecH3A 0B8, Canada
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), CCT La Plata-CONICET, Casilla de Correo 16, Sucursal 4, La Plata1900, Argentina
| | - Andrés M Durantini
- Department of Chemistry and Quebec Center for Applied Materials (QCAM), McGill University, 801 Sherbrook Street West, Montreal, QuebecH3A 0B8, Canada
| | - Julia McCain
- Department of Chemistry and Quebec Center for Applied Materials (QCAM), McGill University, 801 Sherbrook Street West, Montreal, QuebecH3A 0B8, Canada
| | - Laiyi Xu
- Department of Chemistry and Quebec Center for Applied Materials (QCAM), McGill University, 801 Sherbrook Street West, Montreal, QuebecH3A 0B8, Canada
| | - Mariana Vignoni
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), CCT La Plata-CONICET, Casilla de Correo 16, Sucursal 4, La Plata1900, Argentina
| | - Andrés H Thomas
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), CCT La Plata-CONICET, Casilla de Correo 16, Sucursal 4, La Plata1900, Argentina
| | - Mauricio S Baptista
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, São Paulo, São PauloCEP 05508-000, Brazil
| | - Gonzalo Cosa
- Department of Chemistry and Quebec Center for Applied Materials (QCAM), McGill University, 801 Sherbrook Street West, Montreal, QuebecH3A 0B8, Canada
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3
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Gu H, Lv R, Huang X, Chen Q, Dong Y. Rapid quantitative assessment of lipid oxidation in a rapeseed oil-in-water (o/w) emulsion by three-dimensional fluorescence spectroscopy. J Food Compost Anal 2022. [DOI: 10.1016/j.jfca.2022.104762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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4
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Villeneuve P, Bourlieu-Lacanal C, Durand E, Lecomte J, McClements DJ, Decker EA. Lipid oxidation in emulsions and bulk oils: a review of the importance of micelles. Crit Rev Food Sci Nutr 2021:1-41. [PMID: 34839769 DOI: 10.1080/10408398.2021.2006138] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Lipid oxidation is a major cause of quality deterioration in food products. In these foods, lipids are often present in a bulk or in emulsified forms. In both systems, the rate, extent and pathway of oxidation are highly dependent on the presence of colloidal structures and interfaces because these are the locations where oxidation normally occurs. In bulk oils, reverse micelles (association colloids) are present and are believed to play a crucial role on lipid oxidation. Conversely, in emulsions, surfactant micelles are present that also play a major role in lipid oxidation pathways. After a brief description of lipid oxidation and antioxidants mechanisms, this review discusses the current understanding of the influence of micellar structures on lipid oxidation. In particular, is discussed the major impact of the presence of micelles in emulsions, or reverse micelles (association colloids) in bulk oil on the oxidative stability of both systems. Indeed, both micelles in emulsions and associate colloids in bulk oils are discussed in this review as nanoscale structures that can serve as reservoirs of antioxidants and pro-oxidants and are involved in their transport within the concerned system. Their role as nanoreactors where lipid oxidation reactions occur is also commented.
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Affiliation(s)
- Pierre Villeneuve
- CIRAD, UMR QualiSud, Montpellier, France.,QualiSud, Univ Montpellier, CIRAD, Montpellier SupAgro, Université d'Avignon, Université de La Réunion, Montpellier, France
| | - Claire Bourlieu-Lacanal
- QualiSud, Univ Montpellier, CIRAD, Montpellier SupAgro, Université d'Avignon, Université de La Réunion, Montpellier, France.,UMR IATE, Univ Montpellier, INRAE, Institut Agro, Montpellier, France
| | - Erwann Durand
- CIRAD, UMR QualiSud, Montpellier, France.,QualiSud, Univ Montpellier, CIRAD, Montpellier SupAgro, Université d'Avignon, Université de La Réunion, Montpellier, France
| | - Jérôme Lecomte
- CIRAD, UMR QualiSud, Montpellier, France.,QualiSud, Univ Montpellier, CIRAD, Montpellier SupAgro, Université d'Avignon, Université de La Réunion, Montpellier, France
| | | | - Eric A Decker
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts, USA
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5
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Mogensen DJ, Westberg M, Breitenbach T, Etzerodt M, Ogilby PR. Stable Transfection of the Singlet Oxygen Photosensitizing Protein SOPP3: Examining Aspects of Intracellular Behavior †. Photochem Photobiol 2021; 97:1417-1430. [PMID: 33934354 DOI: 10.1111/php.13440] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 04/26/2021] [Indexed: 01/28/2023]
Abstract
Protein-encased chromophores that photosensitize the production of reactive oxygen species, ROS, have been the center of recent activity in studies of oxidative stress. One potential attribute of such systems is that the local environment surrounding the chromophore, and that determines the chromophore's photophysics, ideally remains constant and independent of the global environment into which the system is placed. Therefore, a protein-encased sensitizer localized in the mitochondria would arguably have the same photophysics as that protein-encased sensitizer at the plasma membrane, for example. One thus obtains a useful tool to study processes modulated by spatially localized ROS. One ROS of interest is singlet oxygen, O2 (a1 Δg ). We recently developed a singlet oxygen photosensitizing protein, SOPP, in which flavin mononucleotide, FMN, is encased in a re-engineered light-oxygen-voltage protein. One goal was to ascertain how a version of this system, SOPP3, which selectively makes O2 (a1 Δg ), in vitro, behaves in a cell. We now demonstrate that SOPP3 undergoes exacerbated irradiation-mediated bleaching when expressed at either the plasma membrane or mitochondria in stable cell lines. We find that the environment around the SOPP3 system affects the bleaching rate, which argues against one of the key suppositions in support of a protein-encased chromophore.
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Affiliation(s)
| | | | | | - Michael Etzerodt
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Peter R Ogilby
- Department of Chemistry, Aarhus University, Aarhus, Denmark
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6
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Quantitative Spatiotemporal Mapping of Lipid and Protein Oxidation in Mayonnaise. Antioxidants (Basel) 2020; 9:antiox9121278. [PMID: 33333764 PMCID: PMC7765159 DOI: 10.3390/antiox9121278] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/11/2020] [Accepted: 12/13/2020] [Indexed: 12/02/2022] Open
Abstract
Lipid oxidation in food emulsions is mediated by emulsifiers in the water phase and at the oil–water interface. To unravel the physico-chemical mechanisms and to obtain local lipid and protein oxidation rates, we used confocal laser scanning microscopy (CLSM), thereby monitoring changes in both the fluorescence emission of a lipophilic dye BODIPY 665/676 and protein auto-fluorescence. Our data show that the removal of lipid-soluble antioxidants from mayonnaises promotes lipid oxidation within oil droplets as well as protein oxidation at the oil–water interface. Furthermore, we demonstrate that ascorbic acid acts as either a lipid antioxidant or pro-oxidant depending on the presence of lipid-soluble antioxidants. The effects of antioxidant formulation on local lipid and protein oxidation rates were all statistically significant (p < 0.0001). The observed protein oxidation at the oil–water interface was spatially heterogeneous, which is in line with the heterogeneous distribution of lipoprotein granules from the egg yolk used for emulsification. The impact of the droplet size on local lipid and protein oxidation rates was significant (p < 0.0001) but minor compared to the effects of ascorbic acid addition and lipid-soluble antioxidant depletion. The presented results demonstrate that CLSM can be applied for unraveling the roles of colloidal structure and transport in mediating lipid oxidation in complex food emulsions.
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7
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Schröder A, Laguerre M, Sprakel J, Schroën K, Berton-Carabin CC. Pickering particles as interfacial reservoirs of antioxidants. J Colloid Interface Sci 2020; 575:489-498. [DOI: 10.1016/j.jcis.2020.04.069] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 04/17/2020] [Accepted: 04/17/2020] [Indexed: 11/26/2022]
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8
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Laguerre M, Tenon M, Bily A, Birtić S. Toward a Spatiotemporal Model of Oxidation in Lipid Dispersions: A Hypothesis‐Driven Review. EUR J LIPID SCI TECH 2020. [DOI: 10.1002/ejlt.201900209] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Mickaël Laguerre
- Naturex SA, Science and Technology DepartmentGivaudan Flavour Division 250 rue Pierre Bayle, BP 81218 F‐84911 Avignon Cedex 9 France
| | - Mathieu Tenon
- Naturex SA, Science and Technology DepartmentGivaudan Flavour Division 250 rue Pierre Bayle, BP 81218 F‐84911 Avignon Cedex 9 France
| | - Antoine Bily
- Naturex SA, Science and Technology DepartmentGivaudan Flavour Division 250 rue Pierre Bayle, BP 81218 F‐84911 Avignon Cedex 9 France
| | - Simona Birtić
- Naturex SA, Science and Technology DepartmentGivaudan Flavour Division 250 rue Pierre Bayle, BP 81218 F‐84911 Avignon Cedex 9 France
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9
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The Role of an Acidic Peptide in Controlling the Oxidation Process of Walnut Oil. Foods 2019; 8:foods8100499. [PMID: 31618871 PMCID: PMC6835922 DOI: 10.3390/foods8100499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 10/06/2019] [Accepted: 10/14/2019] [Indexed: 12/16/2022] Open
Abstract
Here, the mechanism of action of an antioxidant peptide rich in acidic amino acid residues in controlling lipid oxidation is discussed. Firstly, in the presence of this peptide, the fluorescence intensity of lipid peroxide in samples of walnut oil was very low, indicating that the peptide prevented the formation of lipid peroxides. Secondly, the production of lipid-derived radicals of oil was reduced by 23% following addition of the anti-oxidative peptide. Thirdly, Raman shifts of the lipid with the anti-oxidative peptide showed that acidic amino acid residues of the peptide were involved in delaying lipid oxidation. Finally, seven peptide inhibitors were synthesized with variations to the amino acid sequence of the original peptide, and Glu-Asp was proven to enhance the peptide's superoxide anion radical scavenging activity and decrease the formation of linoleic acid peroxides. Our findings emphasize the potential value of acidic amino acid residues in protecting unsaturated fatty acids from oxidation.
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10
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Schultze J, Vagias A, Ye L, Prantl E, Breising V, Best A, Koynov K, Marques CM, Butt HJ. Preparation of Monodisperse Giant Unilamellar Anchored Vesicles Using Micropatterned Hydrogel Substrates. ACS OMEGA 2019; 4:9393-9399. [PMID: 31460029 PMCID: PMC6648857 DOI: 10.1021/acsomega.9b00912] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 05/16/2019] [Indexed: 06/10/2023]
Abstract
Giant unilamellar vesicles (GUVs) are model membrane systems consisting of a single lipid bilayer separating an inner lumen from the outer solution, with dimensions comparable to that of eukaryotic cells. The importance of these biomimetic systems has recently grown with the development of easy and safe methods to assemble GUVs from complex biorelevant compositions. However, size and position control is still a key challenge for GUV formation and manipulation. Here, a gel-assisted formation method is introduced, able to produce arrays of giant unilamellar anchored vesicles (GUAVs) with a predetermined narrow size distribution. The approach based on micropatterned gel substrates of cross-linked poly(N-isopropylacrylamide) allows performing parallel measurements on thousands of immobile unilamellar vesicles. Such power and flexibility will respond to the growing need for developing platforms of biomimetic constructs from cell-sized single bilayers.
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Affiliation(s)
- Jennifer Schultze
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Apostolos Vagias
- Zernike
Institute for Advanced Materials, Macromolecular Chemistry and New
Polymeric Materials, University of Groningen, Nijenborgh 4, NL-9747 AG Groningen, Netherlands
| | - Lijun Ye
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Ephraim Prantl
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Valentina Breising
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Andreas Best
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Kaloian Koynov
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Carlos M. Marques
- Institut
Charles Sadron, Université de Strasbourg,
CNRS, 23 rue du Loess, 67034 Strasbourg, France
| | - Hans-Jürgen Butt
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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11
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Watts KE, Blackburn TJ, Pemberton JE. Optical Spectroscopy of Surfaces, Interfaces, and Thin Films: A Status Report. Anal Chem 2019; 91:4235-4265. [PMID: 30790520 DOI: 10.1021/acs.analchem.9b00735] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Kristen E Watts
- Department of Chemistry and Biochemistry University of Arizona 1306 East University Boulevard , Tucson , Arizona 85721 , United States
| | - Thomas J Blackburn
- Department of Chemistry and Biochemistry University of Arizona 1306 East University Boulevard , Tucson , Arizona 85721 , United States
| | - Jeanne E Pemberton
- Department of Chemistry and Biochemistry University of Arizona 1306 East University Boulevard , Tucson , Arizona 85721 , United States
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12
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Kiefer J, Seidel B, Meyer D. Optical Spectroscopy for Analysis and Monitoring of Metalworking Fluids. APPLIED SPECTROSCOPY 2018; 72:1790-1797. [PMID: 29972317 DOI: 10.1177/0003702818789700] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
For various industrial manufacturing processes, water-based metalworking fluids (MWFs) are of high relevance due to their cooling and lubricating ability. They commonly form oil-in-water emulsions or solutions and hence their composition and stability is crucial for their performance in the metalworking process. To ensure a long service life of the MWF, intense monitoring is obligatory. However, examination techniques which display comprehensive and precise information about the actual state of the cooling lubricant in use are currently not available. The present study aims at testing the suitability of spectroscopic methods in terms of Fourier transform infrared, Raman, and laser-induced fluorescence spectroscopy for analyzing and monitoring MWFs. It is shown that all three techniques are capable of determining the initial composition, i.e., the ratio of water and concentrate. Fourier transform infrared provides the best performance regarding monitoring the state of the fluid over an extended period of time. The spectral signatures show distinct changes during a five-month service life in a technical environment.
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Affiliation(s)
- Johannes Kiefer
- Technische Thermodynamik, Universität Bremen, Germany
- School of Engineering, University of Aberdeen, UK
- Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
- MAPEX Center for Materials and Processes, Universität Bremen, Germany
| | - Benedikt Seidel
- MAPEX Center for Materials and Processes, Universität Bremen, Germany
- Leibniz Institute for Materials Engineering IWT, Bremen, Germany
| | - Daniel Meyer
- MAPEX Center for Materials and Processes, Universität Bremen, Germany
- Leibniz Institute for Materials Engineering IWT, Bremen, Germany
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13
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Greene LE, Lincoln R, Cosa G. Spatio-temporal monitoring of lipid peroxyl radicals in live cell studies combining fluorogenic antioxidants and fluorescence microscopy methods. Free Radic Biol Med 2018; 128:124-136. [PMID: 29649566 DOI: 10.1016/j.freeradbiomed.2018.04.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 04/05/2018] [Accepted: 04/06/2018] [Indexed: 12/28/2022]
Abstract
Lipid peroxidation of polyunsaturated fatty acids in cells may occur via their catalytic autoxidation through peroxyl radicals under oxidative stress conditions. Lipid peroxidation is related to a number of pathologies, and may be invoked in new forms of regulated cell death, yet it may also have beneficial roles in cell signaling cascades. Antioxidants are a natural line of defense against lipid peroxidation, and may accordingly impact the biological outcome associated with the redox chemistry of lipid peroxidation. Critical to unraveling the physiological and pathological role of lipid peroxidation is the development of novel probes with the partition, chemical sensitivity and more importantly, molecular specificity, enabling the spatial and temporal imaging of peroxyl radicals in the lipid membranes of live cells, reporting on the redox status of the cell membrane. This review describes our recent progress to visualize lipid peroxidation in model membrane systems and in live cell studies. Our work portrays the mechanistic insight leading to the development of a highly sensitive probe to monitor lipid peroxyl radicals (LOO•). It also describes technical aspects including reagents and fluorescence microscopy methodologies to consider in order to achieve the much sought after monitoring of rates of lipid peroxyl radical production in live cell studies, be it under oxidative stress but also under cell homeostasis. This review seeks to bring attention to the study of lipid redox reactions and to lay the groundwork for the adoption of fluorogenic antioxidant probeshancement and maximum intensity recorded in turn provide a benchmark to estimate, when compared to the control BODIPY dye lacking the intramolecular PeT based switch, the overall exte and related fluorescence microscopy methods toward gaining rich spatiotemporal information on lipid peroxidation in live cells.
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Affiliation(s)
- Lana E Greene
- Department of Chemistry and Quebec Center for Advanced Materials (QCAM/CQMF), McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada H3A 0B8
| | - Richard Lincoln
- Department of Chemistry and Quebec Center for Advanced Materials (QCAM/CQMF), McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada H3A 0B8
| | - Gonzalo Cosa
- Department of Chemistry and Quebec Center for Advanced Materials (QCAM/CQMF), McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada H3A 0B8.
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14
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Shinoda R, Uchimura T. Evaluating the Creaming of an Emulsion via Mass Spectrometry and UV-Vis Spectrophotometry. ACS OMEGA 2018; 3:13752-13756. [PMID: 31458075 PMCID: PMC6644440 DOI: 10.1021/acsomega.8b02283] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 10/11/2018] [Indexed: 06/10/2023]
Abstract
The creaming behavior of a turbid oil-in-water emulsion was observed via the processes of multiphoton ionization time-of-flight mass spectrometry (MPI-TOFMS) and ultraviolet-visible spectrophotometry (UV-vis), and the results were compared. The transmittance measurement by UV-vis showed that the turbidity of the toluene emulsion was decreased with time. However, non-negligible errors are common in the measurement of a sample with high turbidity. The online measurement by MPI-TOFMS detected many spikes in the time profile, which revealed the existence of toluene droplets in the emulsion. A smooth time profile suggested that the signal intensity had initially increased, and then decreased with time; the initial concentration of toluene was 3 g/L, which had decreased by half after 60 min. The signal behavior obtained using MPI-TOFMS differed only slightly from that obtained using UV-vis. Since a change in turbidity is not the same as a change in the local concentration of an oil component, MPI-TOFMS is useful for the analysis of a turbid emulsion and offers additional information concerning the creaming phenomenon of an emulsion.
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15
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Banerjee C, Breitenbach T, Ogilby PR. Spatially Resolved Experiments to Monitor the Singlet Oxygen Initiated Oxidation of Lipid Droplets in Emulsions. CHEMPHOTOCHEM 2018. [DOI: 10.1002/cptc.201800005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | | | - Peter R. Ogilby
- Department of Chemistry; Aarhus University; DK-8000 Aarhus Denmark
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16
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Anankanbil S, Pérez B, Banerjee C, Guo Z. New phenophospholipids equipped with multi-functionalities: Regiospecific synthesis and characterization. J Colloid Interface Sci 2018; 523:169-178. [PMID: 29621644 DOI: 10.1016/j.jcis.2018.03.097] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 03/23/2018] [Accepted: 03/27/2018] [Indexed: 12/11/2022]
Abstract
HYPOTHESIS In multi-phase systems, many complex reactions take place at the interface where a molecule equipped with manifold functionalities is demanded. By taking advantage of the surface-active property of phosphatidylcholine (PC) scaffold and antioxidant properties of phenolic acids, new multifunctional molecules are generated, which are expected to confer physical and oxidative stability to sensitive bioactive ingredients in delivery systems. EXPERIMENTS This work reports a successful synthesis of two new arrays of phenophospholipids sn-1-acyl(C12-C18)-sn-2-caffeoyl and sn-1-caffeoyl-sn-2-acyl phosphatidylcholines via mild scalable regiospecific pathways; as structurally verified by MS, 1H/13C NMR analyses, and characterized by critical micelle concentrations (CMC), FTIR, and DSC analysis. Synthesized phenophospholipids are subjected to stabilizing o/w emulsion, and antioxidation tests as demonstrated by TBARS (Thiobarbituric Acid Reactive Substances) and DPPH (2,2-diphenyl-1-picrylhydrazyl) assays. FINDINGS This study has demonstrated that; (1) phenophospholipids with a broad spectrum of CMC are created, affording superior emulsion stability than soybean PC; (2) all phenophospholipids present improved oxidation inhibition and sn-2-caffeoyl phenophospholipids display superior performance to sn-1-caffeoyl phenophospholipids, soybean PC or admixture of caffeic acid and soybean PC; (3) incorporation of caffeoyl in PC scaffold does not sacrifice radical scavenging ability of caffeic acid, whilst the ion chelating capacity of sn-1-myristoyl(C14)-sn-2-caffeoyl PC enhance by 4.5 times compared to soy PC. Fluorescence Microscopy imaging verified the location of phenophospholipids in the interface as desired. Among synthetic phenophospholipids, sn-1-myristoyl(C14)-sn-2-caffeoyl PC commits the cut-off effect in most desired functionalities, which might be of great potential for multi-purpose applications.
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Affiliation(s)
- Sampson Anankanbil
- Department of Engineering, Faculty of Science and Technology, Aarhus University, 8000 Aarhus, Denmark
| | - Bianca Pérez
- Department of Engineering, Faculty of Science and Technology, Aarhus University, 8000 Aarhus, Denmark
| | - Chiranjib Banerjee
- Department of Chemistry, Faculty of Science and Technology, Aarhus University, 8000 Aarhus, Denmark
| | - Zheng Guo
- Department of Engineering, Faculty of Science and Technology, Aarhus University, 8000 Aarhus, Denmark.
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Development of Multiphoton Ionization Time-of-Flight Mass Spectrometry for the Detection of Small Emulsion Droplets. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8030413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A system for measuring small oil droplets in an oil-in-water (O/W) emulsion was developed using multiphoton ionization time-of-flight mass spectrometry. In the present study, a capillary column with an inner diameter of 15 µm was used for sample introduction. Moreover, a compact microscopic system was constructed for observing an emulsion flowing through a capillary column. As a result, the length for sample introduction was shortened, which is preferable for the direct evaluation of an emulsion. Using this system, the minimum diameter of a detectable toluene droplet in an O/W emulsion was decreased to 1.7 µm. The present system could be used to evaluate the local microenvironment and stability of an emulsion.
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