1
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Huber MJ, Zada L, Ivleva NP, Ariese F. Multi-Parameter Analysis of Nanoplastics in Flow: Taking Advantage of High Sensitivity and Time Resolution Enabled by Stimulated Raman Scattering. Anal Chem 2024. [PMID: 38771150 DOI: 10.1021/acs.analchem.3c05881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Here, we demonstrate the detection of nanoplastics (NPLs) in flow with stimulated Raman scattering (SRS) for the first time. NPLs (plastic particles <1000 nm) have recently been detected in different environmental samples and personal care products. However, their characterization is still an analytical challenge. Multiple parameters, including size, chemical composition, and concentration (particle number and mass), need to be determined. In an earlier paper, online field flow fractionation (FFF)-Raman analysis with optical trapping was shown to be a promising tool for the detection of particles in this size range. SRS, which is based on the enhancement of a vibrational transition by the matching energy difference of two laser beams, would allow for much more sensitive detection and, hence, much shorter acquisition times compared to spontaneous Raman microspectroscopy (RM). Here, we show the applicability of SRS for the flow-based analysis of individual, untrapped NPLs. It was possible to detect polyethylene (PE), polystyrene (PS), and poly(methyl methacrylate) (PMMA) beads with diameters of 100-5000 nm. The high time resolution of 60.5 μs allows us to detect individual signals per particle and to correlate the number of detected particles to the injected mass concentration. Furthermore, due to the high time resolution, optically trapped beads could be distinguished from untrapped beads by their peak shapes. The SRS wavenumber settings add chemical selectivity to the measurement. Whereas optical trapping is necessary for the flow-based detection of particles by spontaneous RM, the current study demonstrates that SRS can detect particles in a flow without trapping. Additionally, the mean particle size could be estimated using the mean width (duration) and intensity of the SRS signals.
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Affiliation(s)
- Maximilian J Huber
- Chair of Analytical Chemistry and Water Chemistry, Institute of Water Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Liron Zada
- LaserLaB Amsterdam, Department of Physics and Astronomy, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands
| | - Natalia P Ivleva
- Chair of Analytical Chemistry and Water Chemistry, Institute of Water Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Freek Ariese
- LaserLaB Amsterdam, Department of Physics and Astronomy, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands
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2
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de Bakker E, Zada L, Schmidt RW, van Haasterecht L, Vethaak AD, Ariese F, Dijkman HBPM, Bult P, Gibbs S, Niessen FB. Baker Grade IV Capsular Contracture Is Correlated with an Increased Amount of Silicone Material: An Intrapatient Study. Plast Reconstr Surg 2023; 152:1191-1200. [PMID: 36877628 PMCID: PMC10666937 DOI: 10.1097/prs.0000000000010359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 10/07/2022] [Indexed: 03/07/2023]
Abstract
BACKGROUND Breast implant surgery is one of the most frequently performed procedures by plastic surgeons worldwide. However, the relationship between silicone leakage and the most common complication, capsular contracture, is far from understood. This study aimed to compare Baker grade I with Baker grade IV capsules regarding their silicone content in an intradonor setting, using two previously validated imaging techniques. METHODS Twenty-two donor-matched capsules from 11 patients experiencing unilateral complaints were included after bilateral explantation surgery. All capsules were examined using both stimulated Raman scattering (SRS) imaging and staining with modified oil red O (MORO). Evaluation was done visually for qualitative and semiquantitative assessment and automated for quantitative analysis. RESULTS Using both SRS and MORO techniques, silicone was found in more Baker grade IV capsules (eight of 11 and 11 of 11, respectively) than in Baker grade I capsules (three of 11 and five of 11, respectively). Baker grade IV capsules also showed significantly more silicone content compared with the Baker grade I capsules. This was true for semiquantitative assessment for both SRS and MORO techniques ( P = 0.019 and P = 0.006, respectively), whereas quantitative analysis proved to be significant for MORO alone ( P = 0.026 versus P = 0.248 for SRS, respectively). CONCLUSIONS In this study, a significant correlation between capsule silicone content and capsular contracture is shown. An extensive and continued foreign body response to silicone particles is likely to be responsible. Considering the widespread use of silicone breast implants, these results affect many women worldwide and warrant a more focused research effort. CLINICAL QUESTION/LEVEL OF EVIDENCE Risk, III.
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Affiliation(s)
- Erik de Bakker
- From the Department of Plastic, Reconstructive and Hand Surgery
- Department of Molecular Cell Biology and Immunology, Amsterdam Movement Sciences, Amsterdam UMC, Vrije Universiteit
| | - Liron Zada
- LaserLaB Amsterdam, Department of Physics and Astronomy, Faculty of Sciences
- Department of Environment and Health, Vrije Universiteit Amsterdam
| | - Robert W. Schmidt
- LaserLaB Amsterdam, Department of Physics and Astronomy, Faculty of Sciences
| | - Ludo van Haasterecht
- From the Department of Plastic, Reconstructive and Hand Surgery
- LaserLaB Amsterdam, Department of Physics and Astronomy, Faculty of Sciences
| | - A. Dick Vethaak
- Department of Environment and Health, Vrije Universiteit Amsterdam
- Deltares, Marine and Coastal Systems
| | - Freek Ariese
- LaserLaB Amsterdam, Department of Physics and Astronomy, Faculty of Sciences
| | | | - Peter Bult
- Department of Pathology, Radboud University Medical Center
| | - Susan Gibbs
- Department of Molecular Cell Biology and Immunology, Amsterdam Movement Sciences, Amsterdam UMC, Vrije Universiteit
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam
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3
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Schmidt R, Giubertoni G, Caporaletti F, Kolpakov P, Shahidzadeh N, Ariese F, Woutersen S. Raman Diffusion-Ordered Spectroscopy. J Phys Chem A 2023; 127:7638-7645. [PMID: 37656920 PMCID: PMC10510375 DOI: 10.1021/acs.jpca.3c03232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/25/2023] [Indexed: 09/03/2023]
Abstract
The Stokes-Einstein relation, which relates the diffusion coefficient of a molecule to its hydrodynamic radius, is commonly used to determine molecular sizes in chemical analysis methods. Here, we combine the size sensitivity of such diffusion-based methods with the structure sensitivity of Raman spectroscopy by performing Raman diffusion-ordered spectroscopy (Raman-DOSY). The core of the Raman-DOSY setup is a flow cell with a Y-shaped channel containing two inlets: one for the sample solution and one for the pure solvent. The two liquids are injected at the same flow rate, giving rise to two parallel laminar flows in the channel. After the flow stops, the solute molecules diffuse from the solution-filled half of the channel into the solvent-filled half at a rate determined by their hydrodynamic radius. The arrival of the solute molecules in the solvent-filled half of the channel is recorded in a spectrally resolved manner by Raman microspectroscopy. From the time series of Raman spectra, a two-dimensional Raman-DOSY spectrum is obtained, which has the Raman frequency on one axis and the diffusion coefficient (or equivalently, hydrodynamic radius) on the other. In this way, Raman-DOSY spectrally resolves overlapping Raman peaks arising from molecules of different sizes. We demonstrate Raman-DOSY on samples containing up to three compounds and derive the diffusion coefficients of small molecules, proteins, and supramolecules (micelles), illustrating the versatility of Raman-DOSY. Raman-DOSY is label-free and does not require deuterated solvents and can thus be applied to samples and matrices that might be difficult to investigate with other diffusion-based spectroscopy methods.
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Affiliation(s)
- Robert
W. Schmidt
- Vrije
Universiteit Amsterdam, De Boelelaan 1105, 1081HV Amsterdam, The Netherlands
- University
of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
| | - Giulia Giubertoni
- University
of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
| | - Federico Caporaletti
- University
of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
- Université
Libre de Bruxelles, Av.
Franklin Roosevelt 50, 1050 Bruxelles, Belgium
| | - Paul Kolpakov
- University
of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
| | | | - Freek Ariese
- Vrije
Universiteit Amsterdam, De Boelelaan 1105, 1081HV Amsterdam, The Netherlands
| | - Sander Woutersen
- University
of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
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4
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Li P, Askes SHC, del Pino Rosendo E, Ariese F, Ramanan C, von Hauff E, Baldi A. Nanoscale Thermometry of Plasmonic Structures via Raman Shifts in Copper Phthalocyanine. J Phys Chem C Nanomater Interfaces 2023; 127:9690-9698. [PMID: 37255925 PMCID: PMC10226115 DOI: 10.1021/acs.jpcc.3c01561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 05/01/2023] [Indexed: 06/01/2023]
Abstract
Temperature measurements at the nanoscale are vital for the application of plasmonic structures in medical photothermal therapy and materials science but very challenging to realize in practice. In this work, we exploit a combination of surface-enhanced Raman spectroscopy together with the characteristic temperature dependence of the Raman peak maxima observed in β-phase copper phthalocyanine (β-CuPc) to measure the surface temperature of plasmonic gold nanoparticles under laser irradiation. We begin by measuring the temperature-dependent Raman shifts of the three most prominent modes of β-CuPc films coated on an array of Au nanodisks over a temperature range of 100-500 K. We then use these calibration curves to determine the temperature of an array of Au nanodisks irradiated with varying laser powers. The extracted temperatures agree quantitatively with the ones obtained via numerical modeling of electromagnetic and thermodynamic properties of the irradiated array. Thin films of β-CuPc display low extinction coefficients in the blue-green region of the visible spectrum as well as exceptional thermal stability, allowing a wide temperature range of operation of our Raman thermometer, with minimal optical distortion of the underlying structures. Thanks to the strong thermal response of the Raman shifts in β-CuPc, our work opens the opportunity to investigate photothermal effects at the nanoscale in real time.
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Affiliation(s)
- Pan Li
- Department
of Physics and Astronomy, Vrije Universiteit
Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands
| | - Sven H. C. Askes
- Department
of Physics and Astronomy, Vrije Universiteit
Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands
| | | | - Freek Ariese
- Department
of Physics and Astronomy, Vrije Universiteit
Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands
| | - Charusheela Ramanan
- Department
of Physics and Astronomy, Vrije Universiteit
Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Elizabeth von Hauff
- Department
of Physics and Astronomy, Vrije Universiteit
Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands
- Faculty
of Electrical and Computer Engineering, Technical University of Dresden, 01062 Dresden, Germany
- Fraunhofer
Institute for Organic Electronics, Electron Beam and Plasma Technology
(FEP), 01277 Dresden, Germany
| | - Andrea Baldi
- Department
of Physics and Astronomy, Vrije Universiteit
Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands
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5
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Groeneveld I, Jaspars A, Akca IB, Somsen GW, Ariese F, van Bommel MR. Use of liquid-core waveguides as photochemical reactors and/or for chemical analysis – An overview. Journal of Photochemistry and Photobiology 2023. [DOI: 10.1016/j.jpap.2023.100168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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6
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Groeneveld I, Ariese F, Somsen GW, van Bommel MR. Gas-permeable liquid-core waveguide coupled to LC-MS for studying the influence of oxygen on photodegradation processes. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
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7
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Wijnhorst R, Demmenie M, Jambon-Puillet E, Ariese F, Bonn D, Shahidzadeh N. Softness of hydrated salt crystals under deliquescence. Nat Commun 2023; 14:1090. [PMID: 36841912 PMCID: PMC9968288 DOI: 10.1038/s41467-023-36834-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 02/16/2023] [Indexed: 02/27/2023] Open
Abstract
Deliquescence is a first-order phase transition, happening when a salt absorbs water vapor. This has a major impact on the stability of crystalline powders that are important for example in pharmacology, food science and for our environment and climate. Here we show that during deliquescence, the abundant salt sodium sulfate decahydrate, mirabilite (Na2SO4·10H2O), behaves differently than anhydrous salts. Using various microscopy techniques combined with Raman spectroscopy, we show that mirabilite crystals not only lose their facets but also become soft and deformable. As a result, microcrystals of mirabilite simultaneously behave crystalline-like in the core bulk and liquid-like at the surface. Defects at the surface can heal at a speed much faster than the deliquescence rate by the mechanism of visco-capillary flow over the surface. While magnesium sulfate hexahydrate (MgSO4⋅6H2O) behaves similarly during deliquescence, a soft and deformable state is completely absent for the anhydrous salts sodium chloride (NaCl) and sodium sulfate thenardite (Na2SO4). The results highlight the effect of crystalline water, and its mobility in the crystalline structure on the observed softness during deliquescence. Controlled hydrated salts have potential applications such as thermal energy storage, where the key parameter is relative humidity rather than temperature.
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Affiliation(s)
- Rozeline Wijnhorst
- Institute of Physics, Van der Waals-Zeeman Institute, University of Amsterdam, Science Park 904, 1098, XH, Amsterdam, The Netherlands
| | - Menno Demmenie
- Institute of Physics, Van der Waals-Zeeman Institute, University of Amsterdam, Science Park 904, 1098, XH, Amsterdam, The Netherlands
| | - Etienne Jambon-Puillet
- Institute of Physics, Van der Waals-Zeeman Institute, University of Amsterdam, Science Park 904, 1098, XH, Amsterdam, The Netherlands.,Laboratory for Soft and Living Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 1-5, Zurich, 8093, Switzerland
| | - Freek Ariese
- LaserLaB, Biophotonics and Medical Imaging, Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081, HV, Amsterdam, The Netherlands
| | - Daniel Bonn
- Institute of Physics, Van der Waals-Zeeman Institute, University of Amsterdam, Science Park 904, 1098, XH, Amsterdam, The Netherlands
| | - Noushine Shahidzadeh
- Institute of Physics, Van der Waals-Zeeman Institute, University of Amsterdam, Science Park 904, 1098, XH, Amsterdam, The Netherlands.
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8
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Groeneveld I, Bagdonaite I, Beekwilder E, Ariese F, Somsen GW, van Bommel MR. Liquid Core Waveguide Cell with In Situ Absorbance Spectroscopy and Coupled to Liquid Chromatography for Studying Light-Induced Degradation. Anal Chem 2022; 94:7647-7654. [PMID: 35587271 PMCID: PMC9161219 DOI: 10.1021/acs.analchem.2c00886] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
In many areas, studying
photostability or the mechanism of photodegradation
is of high importance. Conventional methods to do so can be rather
time-consuming, laborious, and prone to experimental errors. In this
paper we evaluate an integrated and fully automated system for the
study of light-induced degradation, comprising a liquid handler, an
irradiation source and exposure cell with dedicated optics and spectrograph,
and a liquid chromatography (LC) system. A liquid core waveguide (LCW)
was used as an exposure cell, allowing efficient illumination of the
sample over a 12 cm path length. This cell was coupled to a spectrograph,
allowing in situ absorbance monitoring of the exposed sample during
irradiation. The LCW is gas-permeable, permitting diffusion of air
into the cell during light exposure. This unit was coupled online
to LC with diode array detection for immediate and automated analysis
of the composition of the light-exposed samples. The analytical performance
of the new system was established by assessing linearity, limit of
detection, and repeatability of the in-cell detection, sample recovery
and carryover, and overall repeatability of light-induced degradation
monitoring, using riboflavin as the test compound. The applicability
of the system was demonstrated by recording a photodegradation time
profile of riboflavin.
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Affiliation(s)
- Iris Groeneveld
- Division of Bioanalytical Chemistry, Amsterdam Institute for Molecular and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Ingrida Bagdonaite
- Division of Bioanalytical Chemistry, Amsterdam Institute for Molecular and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Edwin Beekwilder
- Da Vinci Laboratory Solutions, Sydneystraat 5, 3047 BP Rotterdam, The Netherlands
| | - Freek Ariese
- LaserLaB, Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Govert W Somsen
- Division of Bioanalytical Chemistry, Amsterdam Institute for Molecular and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Maarten R van Bommel
- Analytical Chemistry Group, van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.,Conservation and Restoration of Cultural Heritage, Amsterdam School for Heritage, Memory and Material Culture, University of Amsterdam, P.O. Box 94552, 1091 GN Amsterdam, The Netherlands
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9
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Groeneveld I, Schoemaker SE, Somsen GW, Ariese F, van Bommel MR. Characterization of a liquid-core waveguide cell for studying the chemistry of light-induced degradation. Analyst 2021; 146:3197-3207. [PMID: 33999083 DOI: 10.1039/d1an00272d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Many organic compounds undergo changes under the influence of light. This might be beneficial in, for example, water purification, but undesirable when cultural-heritage objects fade or when food ingredients (e.g., vitamins) degrade. It is often challenging to establish a strong link between photodegradation products and their parent molecules due to the complexity of the sample. To allow effective study of light-induced degradation (LID), a low-volume exposure cell was created in which solutes are efficiently illuminated (especially at low concentrations) while simultaneously analysed by absorbance spectroscopy. The new LID cell encompasses a gas-permeable liquid-core waveguide (LCW) connected to a spectrograph allowing collection of spectral data in real-time. The aim of the current study was to evaluate the overall performance of the LID cell by assessing its transmission characteristics, the absolute photon flux achieved in the LCW, and its capacity to study solute degradation in presence of oxygen. The potential of the LID set-up for light-exposure studies was successfully demonstrated by monitoring the degradation of the dyes eosin Y and crystal violet.
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Affiliation(s)
- Iris Groeneveld
- Division of Bioanalytical Chemistry, Amsterdam Institute of Molecular and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands.
| | - Suzan E Schoemaker
- Division of Bioanalytical Chemistry, Amsterdam Institute of Molecular and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands.
| | - Govert W Somsen
- Division of Bioanalytical Chemistry, Amsterdam Institute of Molecular and Life Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands.
| | - Freek Ariese
- LaserLaB, Vrije Universiteit Amsterdam, The Netherlands
| | - Maarten R van Bommel
- Analytical Chemistry Group, van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands and Conservation and Restoration of Cultural Heritage, Amsterdam School for Heritage, Memory and Material Culture, University of Amsterdam, P.O. Box 94552, 1091 GN, Amsterdam, The Netherlands
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10
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Lochocki B, Morrema THJ, Ariese F, Hoozemans JJM, de Boer JF. The search for a unique Raman signature of amyloid-beta plaques in human brain tissue from Alzheimer's disease patients. Analyst 2020; 145:1724-1736. [PMID: 31907497 DOI: 10.1039/c9an02087j] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Definite Alzheimer's disease (AD) diagnosis is commonly done on ex vivo brain tissue using immuno-histochemical staining to visualize amyloid-beta (Aβ) aggregates, also known as Aβ plaques. Raman spectroscopy has shown its potential for non-invasive and label-free determination of bio-molecular compositions, aiding the post-mortem diagnosis of pathological tissue. Here, we investigated whether conventional Raman spectroscopy could be used for the detection of amyloid beta deposits in fixed, ex vivo human brain tissue, taken from the frontal cortex region. We examined the spectra and spectral maps of three severe AD cases and two healthy control cases and compared their spectral outcome among each other as well as to recent results in the literature obtained with various spectroscopic techniques. After hyperspectral Raman mapping, Aβ plaques were visualized using Thioflavin-S staining on the exact same tissue sections. As a result, we show that tiny diffuse or tangled-like morphological structures, visible under microscopic conditions on unstained tissue and often but erroneously assumed to be deposits of Aβ, are instead usually an aggregation of highly auto-fluorescent lipofuscin granulates without any, or limited, plaque or plaque-like association. The occurrence of these auto-fluorescent particles is equally distributed in both AD and healthy control cases. Therefore, they cannot be used as possible criteria for Alzheimer's disease diagnosis. Furthermore, a unique plaque-specific/Aβ spectrum could not be determined even after possible spectral interferences were carefully removed.
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Affiliation(s)
- Benjamin Lochocki
- Department of Physics and Astronomy, LaserLaB Amsterdam, VU Amsterdam, The Netherlands.
| | - Tjado H J Morrema
- Department of Pathology, Amsterdam Neuroscience, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Freek Ariese
- Department of Physics and Astronomy, LaserLaB Amsterdam, VU Amsterdam, The Netherlands.
| | - Jeroen J M Hoozemans
- Department of Pathology, Amsterdam Neuroscience, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Johannes F de Boer
- Department of Physics and Astronomy, LaserLaB Amsterdam, VU Amsterdam, The Netherlands.
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11
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van Haasterecht L, Zada L, Schmidt RW, de Bakker E, Barbé E, Leslie HA, Vethaak AD, Gibbs S, de Boer JF, Niessen FB, van Zuijlen PPM, Groot ML, Ariese F. Label-free stimulated Raman scattering imaging reveals silicone breast implant material in tissue. J Biophotonics 2020; 13:e201960197. [PMID: 32049417 DOI: 10.1002/jbio.201960197] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 02/05/2020] [Accepted: 02/07/2020] [Indexed: 06/10/2023]
Abstract
Millions of women worldwide have silicone breast implants. It has been reported that implant failure occurs in approximately a tenth of patients within 10 years, and the consequences of dissemination of silicone debris are poorly understood. Currently, silicone detection in histopathological slides is based on morphological features as no specific immunohistochemical technique is available. Here, we show the feasibility and sensitivity of stimulated Raman scattering (SRS) imaging to specifically detect silicone material in stained histopathological slides, without additional sample treatment. Histology slides of four periprosthetic capsules from different implant types were obtained after explantation, as well as an enlarged axillary lymph node from a patient with a ruptured implant. SRS images coregistered with bright-field images revealed the distribution and quantity of silicone material in the tissue. Fast and high-resolution imaging of histology slides with molecular specificity using SRS provides an opportunity to investigate the role of silicone debris in the pathophysiology of implant-linked diseases.
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Affiliation(s)
- Ludo van Haasterecht
- LaserLaB Amsterdam, Department of Physics and Astronomy, Faculty of Sciences Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam UMC Location VUMC, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Liron Zada
- LaserLaB Amsterdam, Department of Physics and Astronomy, Faculty of Sciences Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
- Department of Environment and Health, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Robert W Schmidt
- LaserLaB Amsterdam, Department of Physics and Astronomy, Faculty of Sciences Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Erik de Bakker
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam UMC Location VUMC, Amsterdam Movement Sciences, Amsterdam, The Netherlands
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Location VUMC, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Ellis Barbé
- Department of Pathology, Amsterdam UMC Location VUMC, Amsterdam, The Netherlands
| | - Heather A Leslie
- Department of Environment and Health, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - A Dick Vethaak
- Department of Environment and Health, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
- Deltares, Marine and Coastal Systems, Delft, The Netherlands
| | - Susan Gibbs
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Location VUMC, Amsterdam Movement Sciences, Amsterdam, The Netherlands
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Johannes F de Boer
- LaserLaB Amsterdam, Department of Physics and Astronomy, Faculty of Sciences Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Frank B Niessen
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam UMC Location VUMC, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Paul P M van Zuijlen
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam UMC Location VUMC, Amsterdam Movement Sciences, Amsterdam, The Netherlands
- Burn Center and Department of Plastic and Reconstructive Surgery, Red Cross Hospital, Beverwijk, The Netherlands
| | - Marie Louise Groot
- LaserLaB Amsterdam, Department of Physics and Astronomy, Faculty of Sciences Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Freek Ariese
- LaserLaB Amsterdam, Department of Physics and Astronomy, Faculty of Sciences Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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12
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Patty CHL, Ten Kate IL, Buma WJ, van Spanning RJM, Steinbach G, Ariese F, Snik F. Circular Spectropolarimetric Sensing of Vegetation in the Field: Possibilities for the Remote Detection of Extraterrestrial Life. Astrobiology 2019; 19:1221-1229. [PMID: 31361507 DOI: 10.1089/ast.2019.2050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Homochirality is a generic and unique property of all biochemical life, and the fractional circular polarization of light it induces therefore constitutes a potentially unambiguous biosignature. However, while high-quality circular polarimetric spectra can be easily and quickly obtained in the laboratory, accurate measurements in the field are much more challenging due to large changes in illumination and target movement. In this study, we measured various targets in the field, up to distances of a few kilometers, using the dedicated circular spectropolarimeter TreePol. We show how photosynthetic life can readily be distinguished from abiotic matter. We underline the potential of circular polarization signals as a remotely accessible means to characterize and monitor terrestrial vegetation, for example, for agriculture and forestry. In addition, we discuss the potential of circular polarization for the remote detection of extraterrestrial life.
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Affiliation(s)
- C H Lucas Patty
- Amsterdam Institute for Molecules, Medicine and Systems (AIMMS), VU Amsterdam, Amsterdam, The Netherlands
- Institute of Plant Biology, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
- Biofotonika R&D Ltd., Szeged, Hungary
| | - Inge Loes Ten Kate
- Department of Earth Sciences, Utrecht University, Budapestlaan 4, Utrecht 3584 CD, The Netherlands
| | - Wybren Jan Buma
- HIMS, Photonics group, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Rob J M van Spanning
- Amsterdam Institute for Molecules, Medicine and Systems (AIMMS), VU Amsterdam, Amsterdam, The Netherlands
| | - Gábor Steinbach
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Freek Ariese
- LaserLaB, VU Amsterdam, Amsterdam, The Netherlands
| | - Frans Snik
- Leiden Observatory, Leiden University, Leiden, The Netherlands
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13
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Zietek BM, Still KBM, Jaschusch K, Bruyneel B, Ariese F, Brouwer TJF, Luger M, Limburg RJ, Rosier JC, V Iperen DJ, Casewell NR, Somsen GW, Kool J. Bioactivity Profiling of Small-Volume Samples by Nano Liquid Chromatography Coupled to Microarray Bioassaying Using High-Resolution Fractionation. Anal Chem 2019; 91:10458-10466. [PMID: 31373797 PMCID: PMC6706796 DOI: 10.1021/acs.analchem.9b01261] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
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High-throughput
screening platforms for the identification of bioactive
compounds in mixtures have become important tools in the drug discovery
process. Miniaturization of such screening systems may overcome problems
associated with small sample volumes and enhance throughput and sensitivity.
Here we present a new screening platform, coined picofractionation
analytics, which encompasses microarray bioassays and mass spectrometry
(MS) of components from minute amounts of samples after their nano
liquid chromatographic (nanoLC) separation. Herein, nanoLC was coupled
to a low-volume liquid dispenser equipped with pressure-fed solenoid
valves, enabling 50-nL volumes of column effluent (300 nL/min) to
be discretely deposited on a glass slide. The resulting fractions
were dried and subsequently bioassayed by sequential printing of nL-volumes
of reagents on top of the spots. Unwanted evaporation of bioassay
liquids was circumvented by employing mineral oil droplets. A fluorescence
microscope was used for assay readout in kinetic mode. Bioassay data
were correlated to MS data obtained using the same nanoLC conditions
in order to assign bioactives. The platform provides the possibility
of freely choosing a wide diversity of bioassay formats, including
those requiring long incubation times. The new method was compared
to a standard bioassay approach, and its applicability was demonstrated
by screening plasmin inhibitors and fibrinolytic bioactives from mixtures
of standards and snake venoms, revealing active peptides and coagulopathic
proteases.
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Affiliation(s)
- Barbara M Zietek
- Division of BioAnalytical Chemistry, Amsterdam Institute of Molecules, Medicines and Systems , Vrije Universiteit Amsterdam , Amsterdam 1081 HZ , The Netherlands
| | - Kristina B M Still
- Division of BioAnalytical Chemistry, Amsterdam Institute of Molecules, Medicines and Systems , Vrije Universiteit Amsterdam , Amsterdam 1081 HZ , The Netherlands
| | - Kevin Jaschusch
- Division of BioAnalytical Chemistry, Amsterdam Institute of Molecules, Medicines and Systems , Vrije Universiteit Amsterdam , Amsterdam 1081 HZ , The Netherlands
| | - Ben Bruyneel
- Division of BioAnalytical Chemistry, Amsterdam Institute of Molecules, Medicines and Systems , Vrije Universiteit Amsterdam , Amsterdam 1081 HZ , The Netherlands
| | - Freek Ariese
- LaserLaB , Vrije Universiteit Amsterdam , Amsterdam 1081 HZ , The Netherlands
| | - Tinco J F Brouwer
- Electronic Engineering , Vrije Universiteit Amsterdam , Amsterdam 1081 HZ , The Netherlands
| | - Matthijs Luger
- Electronic Engineering , Vrije Universiteit Amsterdam , Amsterdam 1081 HZ , The Netherlands
| | - Rob J Limburg
- Electronic Engineering , Vrije Universiteit Amsterdam , Amsterdam 1081 HZ , The Netherlands
| | - Joost C Rosier
- Fine Mechanics and Engineering Beta-VU , Vrije Universiteit Amsterdam , Amsterdam 1081 HZ , The Netherlands
| | - Dick J V Iperen
- Fine Mechanics and Engineering Beta-VU , Vrije Universiteit Amsterdam , Amsterdam 1081 HZ , The Netherlands
| | - Nicholas R Casewell
- Centre for Snakebite Research & Interventions , Liverpool School of Tropical Medicine , Pembroke Place , Liverpool L3 5QA , U.K.,Centre for Drugs and Diagnostics , Liverpool School of Tropical Medicine , Pembroke Place , Liverpool L3 5QA , U.K
| | - Govert W Somsen
- Division of BioAnalytical Chemistry, Amsterdam Institute of Molecules, Medicines and Systems , Vrije Universiteit Amsterdam , Amsterdam 1081 HZ , The Netherlands
| | - Jeroen Kool
- Division of BioAnalytical Chemistry, Amsterdam Institute of Molecules, Medicines and Systems , Vrije Universiteit Amsterdam , Amsterdam 1081 HZ , The Netherlands
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14
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Patty CHL, Ariese F, Buma WJ, Ten Kate IL, van Spanning RJM, Snik F. Circular spectropolarimetric sensing of higher plant and algal chloroplast structural variations. Photosynth Res 2019; 140:129-139. [PMID: 30141032 PMCID: PMC6548066 DOI: 10.1007/s11120-018-0572-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 08/04/2018] [Indexed: 05/11/2023]
Abstract
Photosynthetic eukaryotes show a remarkable variability in photosynthesis, including large differences in light-harvesting proteins and pigment composition. In vivo circular spectropolarimetry enables us to probe the molecular architecture of photosynthesis in a non-invasive and non-destructive way and, as such, can offer a wealth of physiological and structural information. In the present study, we have measured the circular polarizance of several multicellular green, red, and brown algae and higher plants, which show large variations in circular spectropolarimetric signals with differences in both spectral shape and magnitude. Many of the algae display spectral characteristics not previously reported, indicating a larger variation in molecular organization than previously assumed. As the strengths of these signals vary by three orders of magnitude, these results also have important implications in terms of detectability for the use of circular polarization as a signature of life.
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Affiliation(s)
- C H Lucas Patty
- Molecular Cell Physiology, VU Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands.
| | - Freek Ariese
- LaserLaB, VU Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands
| | - Wybren Jan Buma
- HIMS, Photonics Group, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Inge Loes Ten Kate
- Department of Earth Sciences, Utrecht University, Budapestlaan 4, 3584 CD, Utrecht, The Netherlands
| | - Rob J M van Spanning
- Systems Bioinformatics, VU Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Frans Snik
- Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA, Leiden, The Netherlands
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15
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Patty CHL, Luo DA, Snik F, Ariese F, Buma WJ, Ten Kate IL, van Spanning RJM, Sparks WB, Germer TA, Garab G, Kudenov MW. Imaging linear and circular polarization features in leaves with complete Mueller matrix polarimetry. Biochim Biophys Acta Gen Subj 2018. [PMID: 29526506 DOI: 10.1016/j.bbagen.2018.03.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Spectropolarimetry of intact plant leaves allows to probe the molecular architecture of vegetation photosynthesis in a non-invasive and non-destructive way and, as such, can offer a wealth of physiological information. In addition to the molecular signals due to the photosynthetic machinery, the cell structure and its arrangement within a leaf can create and modify polarization signals. Using Mueller matrix polarimetry with rotating retarder modulation, we have visualized spatial variations in polarization in transmission around the chlorophyll a absorbance band from 650 nm to 710 nm. We show linear and circular polarization measurements of maple leaves and cultivated maize leaves and discuss the corresponding Mueller matrices and the Mueller matrix decompositions, which show distinct features in diattenuation, polarizance, retardance and depolarization. Importantly, while normal leaf tissue shows a typical split signal with both a negative and a positive peak in the induced fractional circular polarization and circular dichroism, the signals close to the veins only display a negative band. The results are similar to the negative band as reported earlier for single macrodomains. We discuss the possible role of the chloroplast orientation around the veins as a cause of this phenomenon. Systematic artefacts are ruled out as three independent measurements by different instruments gave similar results. These results provide better insight into circular polarization measurements on whole leaves and options for vegetation remote sensing using circular polarization.
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Affiliation(s)
- C H Lucas Patty
- Molecular Cell Physiology, VU Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands.
| | - David A Luo
- Optical Sensing Lab, Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Frans Snik
- Leiden Observatory, Leiden University, P.O. Box 9513, Leiden 2300 RA, The Netherlands
| | - Freek Ariese
- LaserLaB, VU Amsterdam, De Boelelaan 1083, Amsterdam 1081 HV, The Netherlands
| | - Wybren Jan Buma
- HIMS, Photonics Group, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Inge Loes Ten Kate
- Department of Earth Sciences, Utrecht University, Budapestlaan 4, Utrecht 3584 CD, The Netherlands
| | - Rob J M van Spanning
- Systems Bioinformatics, VU Amsterdam, De Boelelaan 1108, Amsterdam 1081 HZ, The Netherlands
| | - William B Sparks
- Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
| | - Thomas A Germer
- Senior Science Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899, USA
| | - Győző Garab
- Institute of Plant Biology, Biological Research Centre, Hungarian Academy of Sciences, P.O. Box 521, Szeged H-6701, Hungary; Department of Physics, Faculty of Science, University of Ostrava, Chittussiho 10, Slezská Ostrava, Czech Republic
| | - Michael W Kudenov
- Optical Sensing Lab, Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, NC 27695, USA
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16
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Karlsson TM, Vethaak AD, Almroth BC, Ariese F, van Velzen M, Hassellöv M, Leslie HA. Screening for microplastics in sediment, water, marine invertebrates and fish: Method development and microplastic accumulation. Mar Pollut Bull 2017. [PMID: 28689849 DOI: 10.1016/j.marpolbul.2017.2017.06.081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Measurements of microplastics in biota and abiotic matrices are key elements of exposure and risk assessments for this emerging environmental pollutant. We investigated the abundance of microplastics in field-collected biota, sediment and water. An improved sediment extraction method, based on density separation was developed. For analysis of microplastics in biota we found that an adapted enzymatic digestion protocol using proteinase K performed best, with a 97% recovery of spiked plastic particles and no observed degradation effects on the plastics in subsequent Raman analysis. Field analysis revealed that 8 of 9 tested invertebrate species from the North Sea and 68% of analyzed individuals of brown trout (Salmo trutta) from the Swedish West Coast had microplastics in them. Based on the number of plastic particles per kg d.w. the microplastic concentrations found in mussels were approximately a thousand-fold higher compared to those in sediment and surface water samples from the same location.
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Affiliation(s)
- Therese M Karlsson
- Department of Environment and Health, Vrije Universiteit, De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands; University of Gothenburg, Department of Marine Sciences Sven Loven Research Centre, Kristineberg 566, 45178 Fiskebäckskil, Sweden.
| | - A Dick Vethaak
- Department of Environment and Health, Vrije Universiteit, De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands; Deltares, Marine and Coastal Systems, Boussinesqweg 1, 2629 HV Delft, The Netherlands
| | - Bethanie Carney Almroth
- University of Gothenburg, Department of Biological and Environmental Sciences, Medicinaregatan 18A, 41390 Göteborg, Sweden
| | - Freek Ariese
- LaserLaB, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Martin van Velzen
- Department of Environment and Health, Vrije Universiteit, De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands
| | - Martin Hassellöv
- University of Gothenburg, Department of Marine Sciences Sven Loven Research Centre, Kristineberg 566, 45178 Fiskebäckskil, Sweden
| | - Heather A Leslie
- Department of Environment and Health, Vrije Universiteit, De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands
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17
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Karlsson TM, Vethaak AD, Almroth BC, Ariese F, van Velzen M, Hassellöv M, Leslie HA. Screening for microplastics in sediment, water, marine invertebrates and fish: Method development and microplastic accumulation. Mar Pollut Bull 2017; 122:403-408. [PMID: 28689849 DOI: 10.1016/j.marpolbul.2017.06.081] [Citation(s) in RCA: 249] [Impact Index Per Article: 35.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 06/28/2017] [Accepted: 06/29/2017] [Indexed: 05/22/2023]
Abstract
Measurements of microplastics in biota and abiotic matrices are key elements of exposure and risk assessments for this emerging environmental pollutant. We investigated the abundance of microplastics in field-collected biota, sediment and water. An improved sediment extraction method, based on density separation was developed. For analysis of microplastics in biota we found that an adapted enzymatic digestion protocol using proteinase K performed best, with a 97% recovery of spiked plastic particles and no observed degradation effects on the plastics in subsequent Raman analysis. Field analysis revealed that 8 of 9 tested invertebrate species from the North Sea and 68% of analyzed individuals of brown trout (Salmo trutta) from the Swedish West Coast had microplastics in them. Based on the number of plastic particles per kg d.w. the microplastic concentrations found in mussels were approximately a thousand-fold higher compared to those in sediment and surface water samples from the same location.
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Affiliation(s)
- Therese M Karlsson
- Department of Environment and Health, Vrije Universiteit, De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands; University of Gothenburg, Department of Marine Sciences Sven Loven Research Centre, Kristineberg 566, 45178 Fiskebäckskil, Sweden.
| | - A Dick Vethaak
- Department of Environment and Health, Vrije Universiteit, De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands; Deltares, Marine and Coastal Systems, Boussinesqweg 1, 2629 HV Delft, The Netherlands
| | - Bethanie Carney Almroth
- University of Gothenburg, Department of Biological and Environmental Sciences, Medicinaregatan 18A, 41390 Göteborg, Sweden
| | - Freek Ariese
- LaserLaB, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Martin van Velzen
- Department of Environment and Health, Vrije Universiteit, De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands
| | - Martin Hassellöv
- University of Gothenburg, Department of Marine Sciences Sven Loven Research Centre, Kristineberg 566, 45178 Fiskebäckskil, Sweden
| | - Heather A Leslie
- Department of Environment and Health, Vrije Universiteit, De Boelelaan 1087, 1081 HV Amsterdam, The Netherlands
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18
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Roy K, Kayal S, Ravi Kumar V, Beeby A, Ariese F, Umapathy S. Understanding Ultrafast Dynamics of Conformation Specific Photo-Excitation: A Femtosecond Transient Absorption and Ultrafast Raman Loss Study. J Phys Chem A 2017; 121:6538-6546. [DOI: 10.1021/acs.jpca.7b03893] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Khokan Roy
- Department
of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Surajit Kayal
- Department
of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Venkatraman Ravi Kumar
- Department
of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Andrew Beeby
- Department
of Chemistry, University of Durham, South Road, Durham DH1 3LE, U.K
| | - Freek Ariese
- Department
of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India
- LaserLaB, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands
| | - Siva Umapathy
- Department
of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India
- Department
of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, 560012, India
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19
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van Hoorn CH, Wessels C, Ariese F, Mank AJG. Fast High-Resolution Screening Method for Reactive Surfaces by Combining Atomic Force Microscopy and Surface-Enhanced Raman Scattering. Appl Spectrosc 2017; 71:1551-1559. [PMID: 28664782 DOI: 10.1177/0003702816683528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A fast high-resolution screening method for reactive surfaces is presented. Atomic force microscopy (AFM) and surface-enhanced Raman spectroscopy (SERS) are combined in one method in order to be able to obtain both morphological and chemical information about processes at a surface. In order to accurately align the AFM and SERS images, an alignment pattern on the substrate material is exploited. Subsequent SERS scans with sub-micron resolution are recorded in 30 min per scan for an area of 100 × 100 µm2 and are accompanied by morphological information, supplied by a fast AFM, of the same area. Hence, a complete reactivity overview is obtained within several hours with only a monolayer of reactant. To demonstrate the working principle of this method, a SERS substrate containing the alignment pattern and silver nanoparticle aggregates as catalytic sites is prepared to study the photo-catalytic reduction of p-nitrothiophenol ( p-NTP).
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Affiliation(s)
- Camiel H van Hoorn
- 1 Faculty of Sciences and LaserLaB, VU University, Amsterdam, The Netherlands
| | - Carlos Wessels
- 1 Faculty of Sciences and LaserLaB, VU University, Amsterdam, The Netherlands
| | - Freek Ariese
- 1 Faculty of Sciences and LaserLaB, VU University, Amsterdam, The Netherlands
| | - Arjan J G Mank
- 2 Philips Lighting, High-Tech Campus, Eindhoven, The Netherlands
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20
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Roy K, Kayal S, Ariese F, Beeby A, Umapathy S. Mode specific excited state dynamics study of bis(phenylethynyl)benzene from ultrafast Raman loss spectroscopy. J Chem Phys 2017; 146:064303. [DOI: 10.1063/1.4975174] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Khokan Roy
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Surajit Kayal
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Freek Ariese
- On leave from LaserLaB, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands
| | - Andrew Beeby
- Department of Chemistry, University of Durham, South Road, Durham DH1 3LE, United Kingdom
| | - Siva Umapathy
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
- On leave from LaserLaB, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands
- Department of Chemistry, University of Durham, South Road, Durham DH1 3LE, United Kingdom
- Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 560012, India
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21
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Siewert B, van Rixel VHS, van Rooden EJ, Hopkins SL, Moester MJB, Ariese F, Siegler MA, Bonnet S. Chemical Swarming: Depending on Concentration, an Amphiphilic Ruthenium Polypyridyl Complex Induces Cell Death via Two Different Mechanisms. Chemistry 2016; 22:10960-8. [PMID: 27373895 PMCID: PMC5096026 DOI: 10.1002/chem.201600927] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Indexed: 01/08/2023]
Abstract
The crystal structure and in vitro cytotoxicity of the amphiphilic ruthenium complex [3](PF6 )2 are reported. Complex [3](PF6 )2 contains a Ru-S bond that is stable in the dark in cell-growing medium, but is photosensitive. Upon blue-light irradiation, complex [3](PF6 )2 releases the cholesterol-thioether ligand 2 and an aqua ruthenium complex [1](PF6 )2 . Although ligand 2 and complex [1](PF6 )2 are by themselves not cytotoxic, complex [3](PF6 )2 was unexpectedly found to be as cytotoxic as cisplatin in the dark, that is, with micromolar effective concentrations (EC50 ), against six human cancer cell lines (A375, A431, A549, MCF-7, MDA-MB-231, and U87MG). Blue-light irradiation (λ=450 nm, 6.3 J cm(-2) ) had little influence on the cytotoxicity of [3](PF6 )2 after 6 h of incubation time, but it increased the cytotoxicity of the complex by a factor 2 after longer (24 h) incubation. Exploring the unexpected biological activity of [3](PF6 )2 in the dark elucidated an as-yet unknown bifaceted mode of action that depended on concentration, and thus, on the aggregation state of the compound. At low concentration, it acts as a monomer, inserts into the membrane, and can deliver [1](2+) inside the cell upon blue-light activation. At higher concentrations (>3-5 μm), complex [3](PF6 )2 forms supramolecular aggregates that induce non-apoptotic cell death by permeabilizing cell membranes and extracting lipids and membrane proteins.
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Affiliation(s)
- Bianka Siewert
- Leiden Institute of Chemistry, Leiden University, 2300 RA, Leiden, Netherlands), FAX
| | - Vincent H S van Rixel
- Leiden Institute of Chemistry, Leiden University, 2300 RA, Leiden, Netherlands), FAX
| | - Eva J van Rooden
- Leiden Institute of Chemistry, Leiden University, 2300 RA, Leiden, Netherlands), FAX
| | - Samantha L Hopkins
- Leiden Institute of Chemistry, Leiden University, 2300 RA, Leiden, Netherlands), FAX
| | - Miriam J B Moester
- Department of Physics & Astronomy, Vrije Universiteit Amsterdam, 1081 HV, Amsterdam, Netherlands
| | - Freek Ariese
- Department of Physics & Astronomy, Vrije Universiteit Amsterdam, 1081 HV, Amsterdam, Netherlands
| | - Maxime A Siegler
- Small Molecule X-ray Crystallography Facility, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Sylvestre Bonnet
- Leiden Institute of Chemistry, Leiden University, 2300 RA, Leiden, Netherlands), FAX.
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22
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Ravi Kumar V, Ariese F, Umapathy S. Triplet excited electronic state switching induced by hydrogen bonding: A transient absorption spectroscopy and time-dependent DFT study. J Chem Phys 2016; 144:114301. [PMID: 27004870 DOI: 10.1063/1.4943514] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The solvent plays a decisive role in the photochemistry and photophysics of aromatic ketones. Xanthone (XT) is one such aromatic ketone and its triplet-triplet (T-T) absorption spectra show intriguing solvatochromic behavior. Also, the reactivity of XT towards H-atom abstraction shows an unprecedented decrease in protic solvents relative to aprotic solvents. Therefore, a comprehensive solvatochromic analysis of the triplet-triplet absorption spectra of XT was carried out in conjunction with time dependent density functional theory using the ad hoc explicit solvent model approach. A detailed solvatochromic analysis of the T-T absorption bands of XT suggests that the hydrogen bonding interactions are different in the corresponding triplet excited states. Furthermore, the contributions of non-specific and hydrogen bonding interactions towards differential solvation of the triplet states in protic solvents were found to be of equal magnitude. The frontier molecular orbital and electron density difference analysis of the T1 and T2 states of XT indicates that the charge redistribution in these states leads to intermolecular hydrogen bond strengthening and weakening, respectively, relative to the S0 state. This is further supported by the vertical excitation energy calculations of the XT-methanol supra-molecular complex. The intermolecular hydrogen bonding potential energy curves obtained for this complex in the S0, T1, and T2 states support the model. In summary, we propose that the different hydrogen bonding mechanisms exhibited by the two lowest triplet excited states of XT result in a decreasing role of the nπ(∗) triplet state, and are thus responsible for its reduced reactivity towards H-atom abstraction in protic solvents.
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Affiliation(s)
- Venkatraman Ravi Kumar
- Inorganic and Physical Chemistry Department, Indian Institute of Science, Bangalore 560012, India
| | - Freek Ariese
- Inorganic and Physical Chemistry Department, Indian Institute of Science, Bangalore 560012, India
| | - Siva Umapathy
- Inorganic and Physical Chemistry Department, Indian Institute of Science, Bangalore 560012, India
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23
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Besemer M, Bloemenkamp R, Ariese F, Manen HJV. Identification of Multiple Water–Iodide Species in Concentrated NaI Solutions Based on the Raman Bending Vibration of Water. J Phys Chem A 2016; 120:709-14. [DOI: 10.1021/acs.jpca.5b10102] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthieu Besemer
- LaserLaB VU University, De Boelelaan
1081, 1081 HV Amsterdam, The Netherlands
- Supply Chain, Research & Development, Strategic Research Group Measurement & Analytical Science, AkzoNobel, Zutphenseweg 10, 7418 AJ Deventer, The Netherlands
- TI-COAST, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Rob Bloemenkamp
- Supply Chain, Research & Development, Strategic Research Group Measurement & Analytical Science, AkzoNobel, Zutphenseweg 10, 7418 AJ Deventer, The Netherlands
| | - Freek Ariese
- LaserLaB VU University, De Boelelaan
1081, 1081 HV Amsterdam, The Netherlands
| | - Henk-Jan van Manen
- Supply Chain, Research & Development, Strategic Research Group Measurement & Analytical Science, AkzoNobel, Zutphenseweg 10, 7418 AJ Deventer, The Netherlands
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24
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Kumar S, Verma T, Mukherjee R, Ariese F, Somasundaram K, Umapathy S. Raman and infra-red microspectroscopy: towards quantitative evaluation for clinical research by ratiometric analysis. Chem Soc Rev 2016; 45:1879-900. [DOI: 10.1039/c5cs00540j] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We demonstrate how ratioing spectral bands can circumvent experimental artefacts, and present a library of ratios from the biomedical literature.
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Affiliation(s)
- Srividya Kumar
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bengaluru 560 012
- India
| | - Taru Verma
- Centre for Biosystems Science and Engineering
- Indian Institute of Science
- Bangalore-560012
- India
| | - Ria Mukherjee
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bengaluru 560 012
- India
| | - Freek Ariese
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bengaluru 560 012
- India
| | - Kumaravel Somasundaram
- Department of Microbiology and Cell Biology
- Indian Institute of Science
- Bangalore 560 012
- India
| | - Siva Umapathy
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bengaluru 560 012
- India
- Department of Instrumentation and Applied Physics
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25
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Gautam R, Vanga S, Ariese F, Umapathy S. Review of multidimensional data processing approaches for Raman and infrared spectroscopy. EPJ Techn Instrum 2015; 2:8. [PMID: 0 DOI: 10.1140/epjti/s40485-015-0018-6] [Citation(s) in RCA: 275] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
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26
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Dutta A, Gautam R, Chatterjee S, Ariese F, Sikdar SK, Umapathy S. Ascorbate protects neurons against oxidative stress: a Raman microspectroscopic study. ACS Chem Neurosci 2015; 6:1794-801. [PMID: 26237409 DOI: 10.1021/acschemneuro.5b00106] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Oxidative stress due to excessive accumulation of reactive oxygen or nitrogen species in the brain as seen in certain neurodegenerative diseases can have deleterious effects on neurons. Hydrogen peroxide, endogenously generated in neurons under normal physiological conditions, can produce an excess of hydroxyl radical via a Fenton mediated mechanism. This may induce acute oxidative injury if not scavenged or removed effectively by antioxidants. There are several biochemical assay methods to estimate oxidative injury in cells; however, they do not provide information on the biochemical changes as the cells get damaged progressively under oxidative stress. Raman microspectroscopy offers the possibility of real time monitoring of the chemical composition of live cells undergoing oxidative stress under physiological conditions. In the present study, a hippocampal neuron coculture was used to observe the acute impact of hydroxyl radicals generated by hydrogen peroxide in the presence of Fe(2+) (Fenton reaction). Raman peaks related to nucleic acids (725, 782, 1092, 1320, 1340, 1420, and 1576 cm(-1)) showed time-dependent changes over the experimental period (60 min), indicating the breakdown of the phosphodiester backbone as well as nuclear bases. Interestingly, ascorbic acid (a potent antioxidant) when cotreated with Fenton reactants showed protection of cells as inferred from the Raman spectra, presumably by scavenging hydroxyl radicals. Little or no change in the Raman spectra was observed for untreated control cells and for cells exposed to Fe(2+) only, H2O2 only, and ascorbate only. A live-dead assay study also supported the current observations. Hence, Raman microspectroscopy has the potential to be an excellent noninvasive tool for early detection of oxidative stress that is seen in neurodegenerative diseases.
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Affiliation(s)
| | | | | | - Freek Ariese
- LaserLaB,
Faculty of Sciences, VU University Amsterdam, 1081 HV Amsterdam, The Netherlands
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27
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van Hoorn CH, Ariese F, Iannuzzi D, Mank AJG. Using ferrule-top opto-mechanical probes as a new tool in VCSEL reliability experiments. Opt Express 2015; 23:30318-30328. [PMID: 26698511 DOI: 10.1364/oe.23.030318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Today, vertical cavity surface emitting lasers (VCSELs) are used in many high-end applications, for which the laser lifetime is a critical parameter. Changes in the spatial distribution of the various emission modes of the VCSEL can be used as an early sign of device degradation, enhancing the speed and detail of failure mode analysis. We have developed a ferrule-top combined atomic force microscopy (AFM) and scanning near-field optical microscopy (SNOM) probe that can be used to analyze the transverse mode pattern of the 850 nm radiation at a <200 nm spatial resolution. During accelerated lifetime testing, the newly developed method shows that small local changes in the optical output can already be detected before any sign of device degradation is observed with conventional methods.
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28
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Kumar VR, Rajkumar N, Ariese F, Umapathy S. Direct Observation of Thermal Equilibrium of Excited Triplet States of 9,10-Phenanthrenequinone. A Time-Resolved Resonance Raman Study. J Phys Chem A 2015; 119:10147-57. [PMID: 26381591 DOI: 10.1021/acs.jpca.5b07972] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The photochemistry of aromatic ketones plays a key role in various physicochemical and biological processes, and solvent polarity can be used to tune their triplet state properties. Therefore, a comprehensive analysis of the conformational structure and the solvent polarity induced energy level reordering of the two lowest triplet states of 9,10-phenanthrenequinone (PQ) was carried out using nanosecond-time-resolved absorption (ns-TRA), time-resolved resonance Raman (TR(3)) spectroscopy, and time dependent-density functional theory (TD-DFT) studies. The ns-TRA of PQ in acetonitrile displays two bands in the visible range, and these two bands decay with similar lifetime at least at longer time scales (μs). Interestingly, TR(3) spectra of these two bands indicate that the kinetics are different at shorter time scales (ns), while at longer time scales they followed the kinetics of ns-TRA spectra. Therefore, we report a real-time observation of the thermal equilibrium between the two lowest triplet excited states of PQ, assigned to nπ* and ππ* of which the ππ* triplet state is formed first through intersystem crossing. Despite the fact that these two states are energetically close and have a similar conformational structure supported by TD-DFT studies, the slow internal conversion (∼2 ns) between the T(2)(1(3)nπ*) and T(1)(1(3)ππ*) triplet states indicates a barrier. Insights from the singlet excited states of PQ in protic solvents [ J. Chem. Phys. 2015 , 142 , 24305 ] suggest that the lowest nπ* and ππ* triplet states should undergo hydrogen bond weakening and strengthening, respectively, relative to the ground state, and these mechanisms are substantiated by TD-DFT calculations. We also hypothesize that the different hydrogen bonding mechanisms exhibited by the two lowest singlet and triplet excited states of PQ could influence its ISC mechanism.
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Affiliation(s)
- Venkatraman Ravi Kumar
- Inorganic and Physical Chemistry Department, Indian Institute of Science , Bangalore 560012, India
| | - Nagappan Rajkumar
- Inorganic and Physical Chemistry Department, Indian Institute of Science , Bangalore 560012, India
| | - Freek Ariese
- Inorganic and Physical Chemistry Department, Indian Institute of Science , Bangalore 560012, India
| | - Siva Umapathy
- Inorganic and Physical Chemistry Department, Indian Institute of Science , Bangalore 560012, India
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29
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Verkaaik MFC, Hooijschuur JH, Davies GR, Ariese F. Raman Spectroscopic Techniques for Planetary Exploration: Detecting Microorganisms through Minerals. Astrobiology 2015; 15:697-707. [PMID: 26186197 DOI: 10.1089/ast.2015.1329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Raman spectroscopy can provide highly specific chemical fingerprints of inorganic and organic materials and is therefore expected to play a significant role in interplanetary missions, especially for the search for life elsewhere in our solar system. A major challenge will be the unambiguous detection of low levels of biomarkers on a mineral background. In addition, these biomarkers may not be present at the surface but rather inside or underneath minerals. Strong scattering may prevent focusing deeper into the sample. In this paper, we report the detection of carotenoid-containing microorganisms behind mineral layers using time-resolved Raman spectroscopy (TRRS). Two extremophiles, the bacterium Deinococcus radiodurans and the cyanobacterium Chroococcidiopsis, were detected through translucent and transparent minerals using 440 nm excitation under resonance conditions to selectively enhance the detection of carotenoids. Using 3 ps laser pulses and a 250 ps gated intensified CCD camera provided depth selectivity for the subsurface microorganisms over the mineral surface layer and in addition lowered the contribution of the fluorescent background. Raman spectra of both organisms could be detected through 5 mm of translucent calcite or 20 mm of transparent halite. Multilayered mineral samples were used to further test the applied method. A separate tunable laser setup for resonance Raman and a commercial confocal Raman microscope, both with continuous (non-gated) detection, were used for comparison. This study demonstrates the capabilities of TRRS for the depth-selective analysis through scattering samples, which could be used in future planetary exploration to detect microorganisms or biomarkers within or behind minerals.
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Affiliation(s)
- Mattheus F C Verkaaik
- 1 LaserLaB, Faculty of Sciences, VU University Amsterdam , Amsterdam, the Netherlands
| | - Jan-Hein Hooijschuur
- 1 LaserLaB, Faculty of Sciences, VU University Amsterdam , Amsterdam, the Netherlands
- 2 Deep Earth and Planetary Science, Faculty of Earth and Life Sciences, VU University Amsterdam , Amsterdam, the Netherlands
| | - Gareth R Davies
- 2 Deep Earth and Planetary Science, Faculty of Earth and Life Sciences, VU University Amsterdam , Amsterdam, the Netherlands
| | - Freek Ariese
- 1 LaserLaB, Faculty of Sciences, VU University Amsterdam , Amsterdam, the Netherlands
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30
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Iping Petterson IE, Esmonde-White FWL, de Wilde W, Morris MD, Ariese F. Tissue phantoms to compare spatial and temporal offset modes of deep Raman spectroscopy. Analyst 2015; 140:2504-12. [DOI: 10.1039/c4an01889c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Tissue phantoms were created with embedded biomineral-simulating inclusions of varying size and depth, and formed of different mixtures of CaCO3 and hydroxyapatite, for comparison of deep Raman spectroscopy techniques.
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Affiliation(s)
| | | | | | | | - Freek Ariese
- LaserLaB
- VU University
- 1081 HV Amsterdam
- The Netherlands
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31
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Zanni M, E D J, Aravamudhan S, Pallipurath A, Arunan E, Schnedermann C, Mishra AK, Warren M, Hirst JD, John F, Pal R, Helliwell JR, Moirangthem K, Chakraborty S, Dijkstra AG, Roy Chowdhury P, Ghiggino K, Miller RJD, Meech S, Medhi H, Hariharan M, Ariese F, Edwards A, Mallia AR, Umapathy S, Meedom Nielsen M, Hunt N, Tian ZY, Skelton J, Sankar G, Goswami D. Time and Space resolved Methods: general discussion. Faraday Discuss 2015; 177:263-92. [DOI: 10.1039/c5fd90017d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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van Hoorn CH, Chavan DC, Tiribilli B, Margheri G, Mank AJG, Ariese F, Iannuzzi D. Opto-mechanical probe for combining atomic force microscopy and optical near-field surface analysis. Opt Lett 2014; 39:4800-4803. [PMID: 25121878 DOI: 10.1364/ol.39.004800] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We have developed a new easy-to-use probe that can be used to combine atomic force microscopy (AFM) and scanning near-field optical microscopy (SNOM). We show that, using this device, the evanescent field, obtained by total internal reflection conditions in a prism, can be visualized by approaching the surface with the scanning tip. Furthermore, we were able to obtain simultaneous AFM and SNOM images of a standard test grating in air and in liquid. The lateral resolution in AFM and SNOM mode was estimated to be 45 and 160 nm, respectively. This new probe overcomes a number of limitations that commercial probes have, while yielding the same resolution.
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33
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Marmodée B, Klerk JD, Ariese F, Gooijer C, Kumke MU. Metal Binding by Humic Substances – Characterization by High-Resolution Lanthanoide Ion Probe Spectroscopy (HR-LIPS). ACTA ACUST UNITED AC 2014. [DOI: 10.1515/zna-2009-3-412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In ultra-low-temperature experiments at 4.7 K the luminescence of Eu(III) bound to different hydroxy- and methoxybenzoic acids and to humic substances (HS) was investigated. The benzoic acid derivatives were used as simple model compounds for common metal-binding structures in HS. The Eu(III) luminescence was directly excited by means of a pulsed dye laser, scanning through the 5D0 ← 7F0 transition of Eu(III) and subsequently high-resolution total luminescence spectra (TLS) were recorded. Based on the thorough analysis of the high-resolution TLS conclusions were drawn with respect to the number of different complexes formed and to the symmetry of the complexes. The crystal-field strength parameter Nν (B2q) was dependent on the electrostatic forces induced by the ligands as well as on the symmetry of the complexes. The formation of thermodynamically stable complexes was found to be slow even for small model ligands such as 2-hydroxybenzoic acid. Comparison between the model compounds and HS clearly revealed that the carboxylate group is the dominant binding site in HS. Indices for the formation of chelates, e. g. similar to 2-hydroxybenzoic acid, were not found for HS
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Affiliation(s)
- Bettina Marmodée
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Straße 24 – 25, D-14476 Potsdam-Golm, Germany
| | - Joost de Klerk
- Department of Analytical Chemistry and Applied Spectroscopy, Vrije Universiteit, De Boelelaan 1083, NL-1081 HV Amsterdam, The Netherlands
| | - Freek Ariese
- Department of Analytical Chemistry and Applied Spectroscopy, Vrije Universiteit, De Boelelaan 1083, NL-1081 HV Amsterdam, The Netherlands
| | - Cees Gooijer
- Department of Analytical Chemistry and Applied Spectroscopy, Vrije Universiteit, De Boelelaan 1083, NL-1081 HV Amsterdam, The Netherlands
| | - Michael U. Kumke
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Straße 24 – 25, D-14476 Potsdam-Golm, Germany
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34
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Höfener S, Kooijman PC, Groen J, Ariese F, Visscher L. Fluorescence behavior of (selected) flavonols: a combined experimental and computational study. Phys Chem Chem Phys 2014; 15:12572-81. [PMID: 23770806 DOI: 10.1039/c3cp44267e] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this article, results of (time-dependent) density functional theory (DFT and TDDFT) calculations are combined with experimental absorption and fluorescence measurements to explain fluorescence properties of a series of flavonols. The well-understood fluorescence properties of 3- and 5-hydroxyflavone are revisited and validate our combined experimental and theoretical approach. The accuracy of the computational data (energy differences for selected points at the PES, excitation energies and oscillator strengths) allows us to understand quite different experimentally observed fluorescence spectra in the presence of only subtle structural differences. We show that for flavonols with additional hydroxyl groups not the neutral molecule but rather anions lead to fluorescence and that solvation molecules need to be included explicitly in the theoretical calculations to obtain a sufficient accuracy-enabling the understanding and prediction of experimental data for flavonols belonging to different sub-classes.
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Affiliation(s)
- Sebastian Höfener
- Amsterdam Center for Multiscale Modelling (ACMM), Section Theoretical Chemistry, VU University Amsterdam, Amsterdam, The Netherlands. s.hoefener.@vu.nl
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35
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Lammers I, Lhiaubet-Vallet V, Ariese F, Miranda MA, Gooijer C. Binding of naproxen enantiomers to human serum albumin studied by fluorescence and room-temperature phosphorescence. Spectrochim Acta A Mol Biomol Spectrosc 2013; 105:67-73. [PMID: 23295212 DOI: 10.1016/j.saa.2012.12.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Revised: 11/30/2012] [Accepted: 12/05/2012] [Indexed: 06/01/2023]
Abstract
The interaction of the enantiomers of the non-steroidal anti-inflammatory drug naproxen (NPX) with human serum albumin (HSA) has been investigated using fluorescence and phosphorescence spectroscopy in the steady-state and time-resolved mode. The absorption, fluorescence excitation, and fluorescence emission spectra of (S)-NPX and (R)-NPX differ in shape in the presence of HSA, indicating that these enantiomers experience a different environment when bound. In solutions containing 0.2M KI, complexation with HSA results in a strongly increased NPX fluorescence intensity and a decreased NPX phosphorescence intensity due to the inhibition of the collisional interaction with the heavy atom iodide. Fluorescence intensity curves obtained upon selective excitation of NPX show 8-fold different slopes for bound and free NPX. No significant difference in the binding constants of (3.8±0.6)×10(5) M(-1) for (S)-NPX and (3.9±0.6)×10(5) M(-1) for (R)-NPX was found. Furthermore, the addition of NPX quenches the phosphorescence of the single tryptophan in HSA (Trp-214) based on Dexter energy transfer. The short-range nature of this mechanism explains the upward curvature of the Stern-Volmer plot observed for HSA: At low concentrations NPX binds to HSA at a distance from Trp-214 and no quenching occurs, whereas at high NPX concentrations the phosphorescence intensity decreases due to dynamic quenching by NPX diffusing into site I from the bulk solution. The dynamic quenching observed in the Stern-Volmer plots based on the longest phosphorescence lifetime indicates an overall binding constant to HSA of about 3×10(5) M(-1) for both enantiomers.
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Affiliation(s)
- Ivonne Lammers
- Biomolecular Analysis and Spectroscopy, LaserLaB, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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36
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Harvey CE, Iping Petterson IE, Weckhuysen BM, Gooijer C, Ariese F, Mank AJG. Looking inside catalyst extrudates with time-resolved surface-enhanced Raman spectroscopy (TR-SERS). Appl Spectrosc 2012; 66:1179-1185. [PMID: 23031701 DOI: 10.1366/12-06698] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Raman spectroscopy is one of the major characterization methods employed over the last few decades as a nondestructive technique for the study of heterogeneous catalysts and related catalytic reactions. However, the promise of practical applicability on millimeter-sized catalyst bodies, such as extrudates, has not been fulfilled completely. Large fluorescence signals and the highly scattering nature of the extrudates often hamper its practical usage. Different approaches to overcome this problem were examined, including the use of time-resolved Raman spectroscopy (TRRS), spatially offset Raman spectroscopy (SORS), surface-enhanced Raman spectroscopy (SERS), and combinations of these techniques. This paper demonstrates that especially TRRS can provide chemical information at depth within catalyst bodies, overcoming fluorescence background signals and allowing for visualization of analytes at different depths. It also examines the application of time-resolved SERS within catalyst bodies to gain insight into localized activity. With these options a wider applicability of Raman spectroscopy for industrial catalysis research becomes within reach.
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Affiliation(s)
- Clare E Harvey
- Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
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37
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Lammers I, Lhiaubet-Vallet V, Consuelo Jiménez M, Ariese F, Miranda MA, Gooijer C. Stereoselective binding of flurbiprofen enantiomers and their methyl esters to human serum albumin studied by time-resolved phosphorescence. Chirality 2012; 24:840-6. [PMID: 22718496 DOI: 10.1002/chir.22080] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Accepted: 03/11/2012] [Indexed: 11/06/2022]
Abstract
The interaction of the nonsteroidal anti-inflammatory drug flurbiprofen (FBP) with human serum albumin (HSA) hardly influences the fluorescence of the protein's single tryptophan (Trp). Therefore, in addition to fluorescence, heavy atom-induced room-temperature phosphorescence is used to study the stereoselective binding of FBP enantiomers and their methyl esters to HSA. Maximal HSA phosphorescence intensities were obtained at a KI concentration of 0.2 M. The quenching of the Trp phosphorescence by FBP is mainly dynamic and based on Dexter energy transfer. The Stern-Volmer plots based on the phosphorescence lifetimes indicate that (R)-FBP causes a stronger Trp quenching than (S)-FBP. For the methyl esters of FBP, the opposite is observed: (S)-(FBPMe) quenches more than (R)-FBPMe. The Stern-Volmer plots of (R)-FBP and (R)-FBPMe are similar although their high-affinity binding sites are different. The methylation of (S)-FBP causes a large change in its effect on the HSA phosphorescence lifetime. Furthermore, the quenching constants of 3.0 × 10(7) M(-1) s(-1) of the R-enantiomers and 2.5 × 10(7) M(-1) s(-1) for the S-enantiomers are not influenced by the methylation and indicate a stereoselectivity in the accessibility of the HSA Trp to these drugs.
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Affiliation(s)
- Ivonne Lammers
- Department of Biomolecular Analysis and Spectroscopy, LaserLaB, VU University Amsterdam, The Netherlands
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38
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Tardioli S, Lammers I, Hooijschuur JH, Ariese F, van der Zwan G, Gooijer C. Complementary Fluorescence and Phosphorescence Study of the Interaction of Brompheniramine with Human Serum Albumin. J Phys Chem B 2012; 116:7033-9. [DOI: 10.1021/jp300055c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Silvia Tardioli
- Department of Biomolecular Analysis and Spectroscopy,
LaserLaB, VU University Amsterdam, De Boelelaan
1083, 1081 HV Amsterdam, The Netherlands
| | - Ivonne Lammers
- Department of Biomolecular Analysis and Spectroscopy,
LaserLaB, VU University Amsterdam, De Boelelaan
1083, 1081 HV Amsterdam, The Netherlands
| | - Jan-Hein Hooijschuur
- Department of Biomolecular Analysis and Spectroscopy,
LaserLaB, VU University Amsterdam, De Boelelaan
1083, 1081 HV Amsterdam, The Netherlands
| | - Freek Ariese
- Department of Biomolecular Analysis and Spectroscopy,
LaserLaB, VU University Amsterdam, De Boelelaan
1083, 1081 HV Amsterdam, The Netherlands
| | - Gert van der Zwan
- Department of Biomolecular Analysis and Spectroscopy,
LaserLaB, VU University Amsterdam, De Boelelaan
1083, 1081 HV Amsterdam, The Netherlands
| | - Cees Gooijer
- Department of Biomolecular Analysis and Spectroscopy,
LaserLaB, VU University Amsterdam, De Boelelaan
1083, 1081 HV Amsterdam, The Netherlands
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39
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Deneckere A, de Vries L, Vekemans B, Van de Voorde L, Ariese F, Vincze L, Moens L, Vandenabeele P. Identification of inorganic pigments used in porcelain cards based on fusing Raman and X-ray fluorescence (XRF) data. Appl Spectrosc 2011; 65:1281-1290. [PMID: 22054088 DOI: 10.1366/11-06368] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Raman spectroscopy and X-ray fluorescence (XRF) spectroscopy are often used as complementary techniques that are well suited for the analysis of art objects because both techniques are fast, sensitive, and noninvasive and measurements can take place in situ. In most of these studies, both techniques are used separately, in the sense that the spectra are evaluated independently and single conclusions are obtained, considering both results. This paper presents a data fusion procedure for Raman and XRF data for the characterization of pigments used in porcelain cards. For the classification of the analyzed points of the porcelain cards principal component analysis (PCA) was used. A first attempt was made to develop a new procedure for the identification of the pigments using a database containing the fused Raman-XRF data of 24 reference pigments. The results show that the classification based on the fused Raman-XRF data is significantly better than the classifications based on the Raman data or the XRF data separately.
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Affiliation(s)
- Annelien Deneckere
- Ghent University, Research group Raman spectroscopy, Department of Analytical Chemistry, Ghent, Belgium.
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40
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Iping Petterson IE, López-López M, García-Ruiz C, Gooijer C, Buijs JB, Ariese F. Noninvasive Detection of Concealed Explosives: Depth Profiling through Opaque Plastics by Time-Resolved Raman Spectroscopy. Anal Chem 2011; 83:8517-23. [DOI: 10.1021/ac2018102] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ingeborg E. Iping Petterson
- Biomolecular Analysis and Spectroscopy, LaserLaB, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - María López-López
- University Institute of Research in Police Sciences, Planta Piloto de Química Fina, University of Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain
- Department of Analytical Chemistry, Faculty of Chemistry, University of Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain
| | - Carmen García-Ruiz
- University Institute of Research in Police Sciences, Planta Piloto de Química Fina, University of Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain
- Department of Analytical Chemistry, Faculty of Chemistry, University of Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain
| | - Cees Gooijer
- Biomolecular Analysis and Spectroscopy, LaserLaB, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Joost B. Buijs
- Biomolecular Analysis and Spectroscopy, LaserLaB, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Freek Ariese
- Biomolecular Analysis and Spectroscopy, LaserLaB, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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41
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Meuzelaar H, Heger M, Ariese F, van der Zwan G. No evidence for non-resonant optical frequency-induced effects on the intrinsic fluorescence of adenosine-5′-triphosphate and the kinetics of the firefly luciferin–luciferase reaction. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2011.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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42
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Beyhan SM, Götz AW, Ariese F, Visscher L, Gooijer C. Computational Study on the Anomalous Fluorescence Behavior of Isoflavones. J Phys Chem A 2011; 115:1493-9. [DOI: 10.1021/jp109059e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Marmodée B, Jahn K, Ariese F, Gooijer C, Kumke MU. Direct Spectroscopic Evidence of 8- and 9-fold Coordinated Europium(III) Species in H2O and D2O. J Phys Chem A 2010; 114:13050-4. [DOI: 10.1021/jp1094036] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bettina Marmodée
- Institute of Chemistry (Physical Chemistry), University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany, and Division of Biomolecular Analysis and Spectroscopy, Laser Centre Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Karolina Jahn
- Institute of Chemistry (Physical Chemistry), University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany, and Division of Biomolecular Analysis and Spectroscopy, Laser Centre Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Freek Ariese
- Institute of Chemistry (Physical Chemistry), University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany, and Division of Biomolecular Analysis and Spectroscopy, Laser Centre Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Cees Gooijer
- Institute of Chemistry (Physical Chemistry), University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany, and Division of Biomolecular Analysis and Spectroscopy, Laser Centre Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Michael U. Kumke
- Institute of Chemistry (Physical Chemistry), University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany, and Division of Biomolecular Analysis and Spectroscopy, Laser Centre Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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Castro-Puyana M, Lammers I, Buijs J, Gooijer C, Ariese F. Sensitized phosphorescence as detection method for the enantioseparation of bupropion by capillary electrophoresis. Electrophoresis 2010; 31:3928-36. [DOI: 10.1002/elps.201000352] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Beyer J, Jonsson G, Porte C, Krahn MM, Ariese F. Analytical methods for determining metabolites of polycyclic aromatic hydrocarbon (PAH) pollutants in fish bile: A review. Environ Toxicol Pharmacol 2010; 30:224-44. [PMID: 21787655 DOI: 10.1016/j.etap.2010.08.004] [Citation(s) in RCA: 162] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2010] [Accepted: 08/22/2010] [Indexed: 05/03/2023]
Abstract
The determination of polycyclic aromatic hydrocarbon (PAH) metabolites in bile can serve as a tool for assessing environmental PAH exposure in fish. Biliary PAH metabolite levels can be measured using several analytical methods, including simple fluorescence assays (fixed fluorescence detection or synchronous fluorescence spectrometry); high-performance liquid chromatography with fluorescence detection (HPLC-F); gas chromatography-mass spectrometry (GC-MS) after deconjugation, extraction and derivatization of the bile sample, and finally by advanced liquid chromatography-tandem mass spectrometry (LC-MS/MS) and gas chromatography-tandem mass spectrometry (GC-MS/MS) methods. The method alternatives are highly different both with regard to their analytical performance towards different PAH metabolite structures as well as in general technical demands and their suitability for different monitoring strategies. In the present review, the state-of-the-art for these different analytical methods is presented and the advantages and limitations of each approach as well as aspects related to analytical quality control and inter-laboratory comparability of data and availability of certified reference materials are discussed.
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Affiliation(s)
- Jonny Beyer
- IRIS - International Research Institute of Stavanger, N-4068 Stavanger, Norway; University of Stavanger, N-4036 Stavanger, Norway
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Lammers I, Buijs J, Ariese F, Gooijer C. Sensitized Enantioselective Laser-Induced Phosphorescence Detection in Chiral Capillary Electrophoresis. Anal Chem 2010; 82:9410-7. [DOI: 10.1021/ac101764z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ivonne Lammers
- Department of Biomolecular Analysis and Spectroscopy, Laser Centre, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Joost Buijs
- Department of Biomolecular Analysis and Spectroscopy, Laser Centre, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Freek Ariese
- Department of Biomolecular Analysis and Spectroscopy, Laser Centre, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Cees Gooijer
- Department of Biomolecular Analysis and Spectroscopy, Laser Centre, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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Jonker SA, Ariese F, Verhoeven JW. Cation complexation with functionalized 9-arylacridinium ions: Possible applications in the development of cation-selective optical probes. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19891080307] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Klerk JD, van Stokkum IHM, Szemik-Hojniak A, Deperasińska I, Gooijer C, Zhang H, Buma WJ, Ariese F. Excited State Processes of 2-Butylamino-6-methyl-4-nitropyridine N-oxide in Nonpolar Solvents. A Transient Absorption Spectroscopy Study. J Phys Chem A 2010; 114:4045-50. [DOI: 10.1021/jp909468h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joost de Klerk
- Laser Centre Vrije Universiteit Amsterdam, The Netherlands, Department of Chemistry, University of Wroclaw, Poland, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland, and Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, The Netherlands
| | - Ivo H. M. van Stokkum
- Laser Centre Vrije Universiteit Amsterdam, The Netherlands, Department of Chemistry, University of Wroclaw, Poland, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland, and Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, The Netherlands
| | - Anna Szemik-Hojniak
- Laser Centre Vrije Universiteit Amsterdam, The Netherlands, Department of Chemistry, University of Wroclaw, Poland, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland, and Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, The Netherlands
| | - Irena Deperasińska
- Laser Centre Vrije Universiteit Amsterdam, The Netherlands, Department of Chemistry, University of Wroclaw, Poland, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland, and Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, The Netherlands
| | - Cees Gooijer
- Laser Centre Vrije Universiteit Amsterdam, The Netherlands, Department of Chemistry, University of Wroclaw, Poland, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland, and Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, The Netherlands
| | - Hong Zhang
- Laser Centre Vrije Universiteit Amsterdam, The Netherlands, Department of Chemistry, University of Wroclaw, Poland, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland, and Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, The Netherlands
| | - Wybren-Jan Buma
- Laser Centre Vrije Universiteit Amsterdam, The Netherlands, Department of Chemistry, University of Wroclaw, Poland, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland, and Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, The Netherlands
| | - Freek Ariese
- Laser Centre Vrije Universiteit Amsterdam, The Netherlands, Department of Chemistry, University of Wroclaw, Poland, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland, and Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, The Netherlands
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Haselberg R, van der Sneppen L, Ariese F, Ubachs W, Gooijer C, de Jong GJ, Somsen GW. Effectiveness of charged noncovalent polymer coatings against protein adsorption to silica surfaces studied by evanescent-wave cavity ring-down spectroscopy and capillary electrophoresis. Anal Chem 2010; 81:10172-8. [PMID: 19921852 DOI: 10.1021/ac902128n] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Protein adsorption to silica surfaces is a notorious problem in analytical separations. Evanescent-wave cavity ring-down spectroscopy (EW-CRDS) and capillary electrophoresis (CE) were employed to investigate the capability of positively charged polymer coatings to minimize the adsorption of basic proteins. Adsorption of cytochrome c (cyt c) to silica coated with a single layer of polybrene (PB), or a triple layer of PB, dextran sulfate (DS), and PB, was studied and compared to bare silica. Direct analysis of silica surfaces by EW-CRDS revealed that both coatings effectively reduce irreversible protein adsorption. Significant adsorption was observed only for protein concentrations above 400 microM, whereas the PB-DS-PB coating was shown to be most effective and stable. CE analyses of cyt c were performed with and without the respective coatings applied to the fused-silica capillary wall. Monitoring of the electroosmotic flow and protein peak areas indicated a strong reduction of irreversible protein adsorption by the positively charged coatings. Determination of the electrophoretic mobility and peak width of cyt c revealed reversible protein adsorption to the PB coating. It is concluded that the combination of results from EW-CRDS and CE provides highly useful information on the adsorptive characteristics of bare and coated silica surfaces toward basic proteins.
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Affiliation(s)
- Rob Haselberg
- Department of Biomedical Analysis, Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands.
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Iping Petterson IE, Dvořák P, Buijs JB, Gooijer C, Ariese F. Time-resolved spatially offset Raman spectroscopy for depth analysis of diffusely scattering layers. Analyst 2010; 135:3255-9. [DOI: 10.1039/c0an00611d] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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