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Assessing two dominant methods of dental composites linear polymerization shrinkage management: macromonomers and prepolymerized fillers. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03893-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Șerban MV, Nazarie (Ignat) SR, Dinescu S, Radu IC, Zaharia C, Istrătoiu EA, Tănasă E, Herman H, Gharbia S, Baltă C, Hermenean A, Costache M. Silk ProteinsEnriched Nanocomposite Hydrogels Based on Modified MMT Clay and Poly(2-hydroxyethyl methacrylate-co-2-acrylamido-2-methylpropane Sulfonic Acid) Display Favorable Properties for Soft Tissue Engineering. NANOMATERIALS 2022; 12:nano12030503. [PMID: 35159848 PMCID: PMC8839072 DOI: 10.3390/nano12030503] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/25/2022] [Accepted: 01/27/2022] [Indexed: 02/01/2023]
Abstract
Due to their remarkable structures and properties, three-dimensional hydrogels and nanostructured clay particles have been extensively studied and have shown a high potential for tissue engineering as solutions for tissue defects. In this study, four types of 2-hydroxyethyl methacrylate/2-acrylamido-2-methylpropane sulfonic acid/montmorillonite (HEMA/AMPSA/MMT) hydrogels enriched with sericin, and fibroin were prepared and studied in the context of regenerative medicine for soft tissue regenerative medicine. Our aim was to obtain crosslinked hydrogel structures using modified montmorillonite clay as a crosslinking agent. In order to improve the in vitro and in vivo biocompatibility, silk proteins were further incorporated within the hydrogel matrix. Fourier transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR) were performed to prove the chemical structures of the modified MMT and nanocomposite hydrogels. Swelling and rheological measurements showed the good elastic behavior of the hydrogels due to this unique network structure in which modified MMT acts as a crosslinking agent. Hydrogel biocompatibility was assessed by MTT, LDH and LIVE/DEAD assays. The hydrogels were evaluated for their potential to support adipogenesis in vitro and human stem cells isolated from adipose tissue were seeded in them and induced to differentiate. The progress was assessed by evaluation of expression of adipogenic markers (ppar-γ2, perilipin) evaluated by qPCR. The potential of the materials to support tissue regeneration was further evaluated on animal models in vivo. All materials proved to be biocompatible, with better results on the 95% HEMA 5% AMPSA enriched with sericin and fibroin material. This composition promoted a better development of adipogenesis compared to the other compositions studied, due the addition of sericin and fibroin. The results were confirmed in vivo as well, with a better progress of soft tissue regeneration after implantation in mice. Therefore, hydrogel 95% HEMA 5% AMPSA enriched with sericin as well as fibroin showed the best results that recommend it for future soft tissue engineering application.
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Affiliation(s)
- Mirela Violeta Șerban
- Department of Biochemistry and Molecular Biology, University of Bucharest, 050663 Bucharest, Romania; (M.V.Ș.); (S.-R.N.); (M.C.)
| | - Simona-Rebeca Nazarie (Ignat)
- Department of Biochemistry and Molecular Biology, University of Bucharest, 050663 Bucharest, Romania; (M.V.Ș.); (S.-R.N.); (M.C.)
| | - Sorina Dinescu
- Department of Biochemistry and Molecular Biology, University of Bucharest, 050663 Bucharest, Romania; (M.V.Ș.); (S.-R.N.); (M.C.)
- The Research Institute of the University of Bucharest (ICUB), University of Bucharest, 050663 Bucharest, Romania
- Correspondence: (S.D.); (A.H.)
| | - Ionuț-Cristian Radu
- Advanced Polymer Materials Group, University Politehnica of Bucharest, 011061 Bucharest, Romania; (I.-C.R.); (C.Z.); (E.-A.I.); (E.T.)
| | - Cătălin Zaharia
- Advanced Polymer Materials Group, University Politehnica of Bucharest, 011061 Bucharest, Romania; (I.-C.R.); (C.Z.); (E.-A.I.); (E.T.)
| | - Elena-Alexandra Istrătoiu
- Advanced Polymer Materials Group, University Politehnica of Bucharest, 011061 Bucharest, Romania; (I.-C.R.); (C.Z.); (E.-A.I.); (E.T.)
| | - Eugenia Tănasă
- Advanced Polymer Materials Group, University Politehnica of Bucharest, 011061 Bucharest, Romania; (I.-C.R.); (C.Z.); (E.-A.I.); (E.T.)
| | - Hildegard Herman
- “Aurel Ardelean” Institute of Life Sciences, ”Vasile Goldiș” Western University of Arad, 310025 Arad, Romania; (H.H.); (S.G.); (C.B.)
| | - Sami Gharbia
- “Aurel Ardelean” Institute of Life Sciences, ”Vasile Goldiș” Western University of Arad, 310025 Arad, Romania; (H.H.); (S.G.); (C.B.)
| | - Cornel Baltă
- “Aurel Ardelean” Institute of Life Sciences, ”Vasile Goldiș” Western University of Arad, 310025 Arad, Romania; (H.H.); (S.G.); (C.B.)
| | - Anca Hermenean
- “Aurel Ardelean” Institute of Life Sciences, ”Vasile Goldiș” Western University of Arad, 310025 Arad, Romania; (H.H.); (S.G.); (C.B.)
- Correspondence: (S.D.); (A.H.)
| | - Marieta Costache
- Department of Biochemistry and Molecular Biology, University of Bucharest, 050663 Bucharest, Romania; (M.V.Ș.); (S.-R.N.); (M.C.)
- The Research Institute of the University of Bucharest (ICUB), University of Bucharest, 050663 Bucharest, Romania
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El-Naggar NEA, Hamouda RA, Saddiq AA, Alkinani MH. Simultaneous bioremediation of cationic copper ions and anionic methyl orange azo dye by brown marine alga Fucus vesiculosus. Sci Rep 2021; 11:3555. [PMID: 33574404 PMCID: PMC7878473 DOI: 10.1038/s41598-021-82827-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Accepted: 01/25/2021] [Indexed: 01/30/2023] Open
Abstract
Textile wastewater contains large quantities of azo dyes mixed with various contaminants especially heavy metal ions. The discharge of effluents containing methyl orange (MO) dye and Cu2+ ions into water is harmful because they have severe toxic effects to humans and the aquatic ecosystem. The dried algal biomass was used as a sustainable, cost-effective and eco-friendly for the treatment of the textile wastewater. Box-Behnken design (BBD) was used to identify the most significant factors for achieving maximum biosorption of Cu2+ and MO from aqueous solutions using marine alga Fucus vesiculosus biomass. The experimental results indicated that 3 g/L of F. vesiculosus biomass was capable of removing 92.76% of copper and 50.27% of MO simultaneously from aqueous solution using MO (60 mg/L), copper (200 mg/L) at pH 7 within 60 min with agitation at 200 rpm. The dry biomass was also investigated using SEM, EDS, and FTIR before and after MO and copper biosorption. FTIR, EDS and SEM analyses revealed obvious changes in the characteristics of the algal biomass as a result of the biosorption process. The dry biomass of F. vesiculosus can eliminate MO and copper ions from aquatic effluents in a feasible and efficient method.
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Affiliation(s)
- Noura El-Ahmady El-Naggar
- Department of Bioprocess Development, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, 21934, Alexandria, Egypt.
| | - Ragaa A Hamouda
- Department of Biology, College of Sciences and Arts Khulais, University of Jeddah, Jeddah, Saudi Arabia
- Microbial Biotechnology Department, Genetic Engineering and Biotechnology, Research Institute, University of Sadat City, El Sadat City, Egypt
| | - Amna A Saddiq
- Department of Biology, College of Sciences, University of Jeddah, Jeddah, Saudi Arabia
| | - Monagi H Alkinani
- Department of Computer Science and Artificial Intelligence College of Computer Science and Engineering, University of Jeddah, Jeddah, Saudi Arabia
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Aminpour H, Eng LM, Kehr SC. Spatially confined vector fields at material-induced resonances in near-field-coupled systems. OPTICS EXPRESS 2020; 28:32316-32330. [PMID: 33114920 DOI: 10.1364/oe.402893] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 09/20/2020] [Indexed: 06/11/2023]
Abstract
Local electric fields play the key role in near-field optical examinations and are especially appealing when exploring heterogeneous or even anisotropic nano-systems. Scattering-type near-field optical microscopy (s-SNOM) is the most commonly used method applied to explore and quantify such confined electric fields at the nanometer length scale: while most works so far did focus on analyzing the z-component oriented perpendicular to the sample surface under p-polarized tip/sample illumination only, recent experimental efforts in s-SNOM report that material resonant excitation might equally allow to probe in-plane electric field components. We thus explore this local vector-field behavior for a simple particle-tip/substrate system by comparing our parametric simulations based on finite element modelling at mid-IR wavelengths, to the standard analytical tip-dipole model. Notably, we analyze all the 4 different combinations for resonant and non-resonant tip and/or sample excitation. Besides the 3-dimensional field confinement under the particle tip present for all scenarios, it is particularly the resonant sample excitations that enable extremely strong field enhancements associated with vector fields pointing along all cartesian coordinates, even without breaking the tip/sample symmetry! In fact, in-plane (s-) resonant sample excitation exceeds the commonly-used p-polarized illumination on non-resonant samples by more than 6 orders of magnitude. Moreover, a variety of different spatial field distributions is found both at and within the sample surface, ranging from electric fields that are oriented strictly perpendicular to the sample surface, to fields that spatially rotate into different directions. Our approach shows that accessing the full vector fields in order to quantify all tensorial properties in nanoscale and modern-type materials lies well within the possibilities and scope of today's s-SNOM technique.
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Song Y, Cong Y, Wang B, Zhang N. Applications of Fourier transform infrared spectroscopy to pharmaceutical preparations. Expert Opin Drug Deliv 2020; 17:551-571. [PMID: 32116058 DOI: 10.1080/17425247.2020.1737671] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Introduction: Various pharmaceutical preparations are widely used for clinical treatment. Elucidation of the mechanisms of drug release and evaluation of drug efficacy in biological samples are important in drug design and drug quality control.Areas covered: This review classifies recent applications of Fourier transform infrared (FTIR) spectroscopy in the field of medicine to comprehend drug release and diffusion. Drug release is affected by many factors of preparations, such as drug delivery system and microstructure polymorphism. The applications of FTIR imaging and nano-FTIR technique in biological samples lay a foundation for studying drug mechanism in vivo.Expert opinion: FTIR spectroscopy meets the research needs on preparations to understand the processes and mechanisms underlying drug release. The combination of attenuated total reflectance-FTIR imaging and nano-FTIR accompanied by chemometrics is a potent tool to overcome the deficiency of conventional infrared detection. FTIR shows an enormous potential in drug characterization, drug quality control, and bio-sample detection.
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Affiliation(s)
- Yijie Song
- Experiment Center for Science and Technology, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yuanhua Cong
- Center for Pharmaceutics Research, Shanghai Institute of Materia Medica Chinese Academy of Sciences, Shanghai, China
| | - Bing Wang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Center for Pharmaceutics Research, Shanghai Institute of Materia Medica Chinese Academy of Sciences, Shanghai, China
| | - Ning Zhang
- Experiment Center for Science and Technology, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Chen X, Hu D, Mescall R, You G, Basov DN, Dai Q, Liu M. Modern Scattering-Type Scanning Near-Field Optical Microscopy for Advanced Material Research. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1804774. [PMID: 30932221 DOI: 10.1002/adma.201804774] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 02/27/2019] [Indexed: 05/27/2023]
Abstract
Infrared and optical spectroscopy represents one of the most informative methods in advanced materials research. As an important branch of modern optical techniques that has blossomed in the past decade, scattering-type scanning near-field optical microscopy (s-SNOM) promises deterministic characterization of optical properties over a broad spectral range at the nanoscale. It allows ultrabroadband optical (0.5-3000 µm) nanoimaging, and nanospectroscopy with fine spatial (<10 nm), spectral (<1 cm-1 ), and temporal (<10 fs) resolution. The history of s-SNOM is briefly introduced and recent advances which broaden the horizons of this technique in novel material research are summarized. In particular, this includes the pioneering efforts to study the nanoscale electrodynamic properties of plasmonic metamaterials, strongly correlated quantum materials, and polaritonic systems at room or cryogenic temperatures. Technical details, theoretical modeling, and new experimental methods are also discussed extensively, aiming to identify clear technology trends and unsolved challenges in this exciting field of research.
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Affiliation(s)
- Xinzhong Chen
- Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Debo Hu
- Division of Nanophotonics, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Ryan Mescall
- Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Guanjun You
- Shanghai Key Lab of Modern Optical Systems and Engineering Research Center of Optical Instrument and System, Ministry of Education, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - D N Basov
- Department of Physics, Columbia University, New York, NY, 10027, USA
| | - Qing Dai
- Division of Nanophotonics, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Mengkun Liu
- Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY, 11794, USA
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Hermann RJ, Gordon MJ. Nanoscale Optical Microscopy and Spectroscopy Using Near-Field Probes. Annu Rev Chem Biomol Eng 2018; 9:365-387. [DOI: 10.1146/annurev-chembioeng-060817-084150] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Light-matter interactions can provide a wealth of detailed information about the structural, electronic, optical, and chemical properties of materials through various excitation and scattering processes that occur over different length, energy, and timescales. Unfortunately, the wavelike nature of light limits the achievable spatial resolution for interrogation and imaging of materials to roughly λ/2 because of diffraction. Scanning near-field optical microscopy (SNOM) breaks this diffraction limit by coupling light to nanostructures that are specifically designed to manipulate, enhance, and/or extract optical signals from very small regions of space. Progress in the SNOM field over the past 30 years has led to the development of many methods to optically characterize materials at lateral spatial resolutions well below 100 nm. We review these exciting developments and demonstrate how SNOM is truly extending optical imaging and spectroscopy to the nanoscale.
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Affiliation(s)
- Richard J. Hermann
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, USA;,
| | - Michael J. Gordon
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, USA;,
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Kästner B, Johnson CM, Hermann P, Kruskopf M, Pierz K, Hoehl A, Hornemann A, Ulrich G, Fehmel J, Patoka P, Rühl E, Ulm G. Infrared Nanospectroscopy of Phospholipid and Surfactin Monolayer Domains. ACS OMEGA 2018; 3:4141-4147. [PMID: 30023886 PMCID: PMC6044929 DOI: 10.1021/acsomega.7b01931] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 03/16/2018] [Indexed: 05/22/2023]
Abstract
A main challenge in understanding the structure of a cell membrane and its interactions with drugs is the ability to chemically study the different molecular species on the nanoscale. We have achieved this for a model system consisting of mixed monolayers (MLs) of the biologically relevant phospholipid 1,2-distearoyl-sn-glycero-phosphatidylcholine and the antibiotic surfactin. By employing nano-infrared (IR) microscopy and spectroscopy in combination with atomic force microscopy imaging, it was possible to identify and chemically detect domain formation of the two constituents as well as to obtain IR spectra of these species with a spatial resolution on the nanoscale. A novel method to enhance the near-field imaging contrast of organic MLs by plasmon interferometry is proposed and demonstrated. In this technique, the organic layer is deposited on gold and ML graphene substrates, the latter of which supports propagating surface plasmons. Plasmon reflections arising from changes in the dielectric environment provided by the organic layer lead to an additional contrast mechanism. Using this approach, the interfacial region between surfactin and the phospholipid has been mapped and a transition region is identified.
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Affiliation(s)
- Bernd Kästner
- Physikalisch-Technische
Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
- E-mail: (B.K.)
| | - C. Magnus Johnson
- Department
of Chemistry, Division of Surface and Corrosion Science, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Peter Hermann
- Physikalisch-Technische
Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
| | - Mattias Kruskopf
- Physikalisch-Technische
Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
| | - Klaus Pierz
- Physikalisch-Technische
Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
| | - Arne Hoehl
- Physikalisch-Technische
Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
| | - Andrea Hornemann
- Physikalisch-Technische
Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
| | - Georg Ulrich
- Physikalisch-Technische
Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
| | - Jakob Fehmel
- Physikalisch-Technische
Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
| | - Piotr Patoka
- Physikalische
Chemie, Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
| | - Eckart Rühl
- Physikalische
Chemie, Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
| | - Gerhard Ulm
- Physikalisch-Technische
Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany
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Affiliation(s)
- Lifu Xiao
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Zachary D Schultz
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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