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Controlling lipid crystallization across multiple length scales by directed shear flow. J Colloid Interface Sci 2023; 630:731-741. [DOI: 10.1016/j.jcis.2022.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/18/2022] [Accepted: 10/01/2022] [Indexed: 11/11/2022]
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2
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Qu C, Li Y, Du S, Geng Y, Su M, Liu H. Raman spectroscopy for rapid fingerprint analysis of meat quality and security: Principles, progress and prospects. Food Res Int 2022; 161:111805. [DOI: 10.1016/j.foodres.2022.111805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 07/06/2022] [Accepted: 08/18/2022] [Indexed: 11/28/2022]
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3
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Bayés‐García L, Colomer‐Llombart E, Aguilar‐Jiménez M, Calvet T. Polymorphic fingerprint as an approach to authenticate Iberian pig categories. J AM OIL CHEM SOC 2021. [DOI: 10.1002/aocs.12543] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Laura Bayés‐García
- Departament de Mineralogia, Petrologia i Geologia Aplicada, Facultat de Ciències de la Terra Universitat de Barcelona Barcelona Spain
| | - Eduard Colomer‐Llombart
- Departament de Mineralogia, Petrologia i Geologia Aplicada, Facultat de Ciències de la Terra Universitat de Barcelona Barcelona Spain
| | - Mercedes Aguilar‐Jiménez
- Departament de Mineralogia, Petrologia i Geologia Aplicada, Facultat de Ciències de la Terra Universitat de Barcelona Barcelona Spain
| | - Teresa Calvet
- Departament de Mineralogia, Petrologia i Geologia Aplicada, Facultat de Ciències de la Terra Universitat de Barcelona Barcelona Spain
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Multiwell Raman plate reader for high-throughput biochemical screening. Sci Rep 2021; 11:15742. [PMID: 34344945 PMCID: PMC8333358 DOI: 10.1038/s41598-021-95139-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 07/14/2021] [Indexed: 11/08/2022] Open
Abstract
Although Raman spectroscopy has been used for the quantitative analysis of samples in many fields, including material science, biomedical, and pharmaceutical research, its low sensitivity hindered the application of the analytical capability for high-throughput screening. Here, we developed a high-throughput Raman screening system that can analyze hundreds of specimens in a multiwell plate simultaneously. Multiple high numerical aperture (NA) lenses are assembled under each well in the multiwell plate to detect Raman scattering simultaneously with high sensitivity. The Raman spectrum of 192 samples loaded on a standard 384-well plate can be analyzed simultaneously. With the developed system, the throughput of Raman measurement was significantly improved (about 100 times) compared to conventional Raman instruments based on a single-point measurement. By using the developed system, we demonstrated high-throughput Raman screening to investigate drug polymorphism and identify a small-molecule binding site in a protein. Furthermore, the same system was used to demonstrate high-speed chemical mapping of a centimeter-sized pork slice.
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Portable Raman Spectrometer as a Screening Tool for Characterization of Iberian Dry-Cured Ham. Foods 2021; 10:foods10061177. [PMID: 34073727 PMCID: PMC8225093 DOI: 10.3390/foods10061177] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/15/2021] [Accepted: 05/20/2021] [Indexed: 12/15/2022] Open
Abstract
Dry-cured Iberian ham is officially classified into different commercial categories according to the pig’s breed and feeding regime. These reach very different prices, thus promoting labelling fraud and causing great damage to the food sector. In this work, a method based on Raman spectroscopy was explored as a rapid in situ screening tool for Iberian ham samples. A total of 110 samples were analyzed to assess the potential of this technique to differentiate purebred, crossbred, acorn-fed and feed-fed dry-cured Iberian ham. A continuous signal probably due to sample fluorescence was obtained, which hid the Raman scattering signal. Therefore, chemometric treatment was applied in order to extract non-apparent information. High validated classification rates were obtained for feeding regime (83.3%) and breed (86.7%). In addition, an interlaboratory study was carried out to confirm the applicability of the method with 52 samples, obtaining a validated rate above 80%.
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6
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Probing fibrin's molecular response to shear and tensile deformation with coherent Raman microscopy. Acta Biomater 2021; 121:383-392. [PMID: 33321217 DOI: 10.1016/j.actbio.2020.12.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 11/16/2020] [Accepted: 12/09/2020] [Indexed: 11/22/2022]
Abstract
Blood clots are essential biomaterials that prevent blood loss and provide a temporary scaffold for tissue repair. In their function, these materials must be capable of resisting mechanical forces from hemodynamic shear and contractile tension without rupture. Fibrin networks, the primary load-bearing element in blood clots, have unique nonlinear mechanical properties resulting from fibrin's hierarchical structure. This structure provides multiscale load bearing from fiber deformation to protein unfolding. Here, we study the fiber and molecular scale response of fibrin under shear and tensile loads in situ using a combination of fluorescence and vibrational (molecular) microscopy. Imaging protein fiber orientation and molecular vibrations, we find that fiber alignment and molecular unfolding in fibrin appear at much larger strains under shear compared to uniaxial tension. Alignment levels reached at 150% shear strain were reached already at 60% tensile strain, and molecular unfolding of fibrin was only detected at shear strains above 300%, whereas fibrin unfolding began already at 20% tensile strain. Moreover, shear deformation caused progressive changes in vibrational modes consistent with increased protofibril and fiber packing that were already present even at very low tensile deformation. Together with a bioinformatic analysis of the primary fibrinogen structure, we propose a scheme for the molecular response of fibrin from low to high deformation, which may relate to the teleological origin of fibrin's resistance to shear and tensile forces.
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7
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Raman imaging for food quality and safety evaluation: Fundamentals and applications. Trends Food Sci Technol 2017. [DOI: 10.1016/j.tifs.2017.01.012] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Liu X, Schmidt H, Mörlein D. Feasibility of boar taint classification using a portable Raman device. Meat Sci 2016; 116:133-9. [PMID: 26882212 DOI: 10.1016/j.meatsci.2016.02.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 01/27/2016] [Accepted: 02/05/2016] [Indexed: 12/20/2022]
Abstract
The feasibility of Raman spectroscopy for boar taint detection and classification was investigated using tainted and untainted backfat samples of 46 boars. For this exploratory study, backfat samples were selected according to their levels of androstenone and skatole as determined by gas chromatography and their sensory score by a trained panel. Raman spectra were collected with a portable device at freshly cut surfaces of frozen-thawed samples. Both inner and outer layers of subcutaneous fat were studied. Their varying level of unsaturation was reflected in the Raman spectra. Partial least squares regression discriminant analysis (PLS-DA) was applied to the spectra together with various pre-processing methods. A model using only spectra obtained at the inner layer resulted in the highest classification accuracy for boar taint (81% of samples correctly classified). The discrimination is shown to reflect differences in the degree of fatty acid saturation between tainted and untainted boars. In conclusion, the findings suggest that with further development Raman spectroscopy may be used to classify boar taint.
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Affiliation(s)
- Xiaoye Liu
- Key laboratory of Meat Processing and Quality Control, Ministry of Education, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China; Department of Animal Science, University of Göttingen, D-37075 Göttingen, Germany
| | - Heinar Schmidt
- University of Bayreuth, Bioanalytical Science and Food Analysis - Research Center of Food Quality, D-95326 Kulmbach, Germany
| | - Daniel Mörlein
- Department of Animal Science, University of Göttingen, D-37075 Göttingen, Germany.
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Motoyama M, Ando M, Sasaki K, Nakajima I, Chikuni K, Aikawa K, Hamaguchi HO. Simultaneous imaging of fat crystallinity and crystal polymorphic types by Raman microspectroscopy. Food Chem 2015; 196:411-7. [PMID: 26593509 DOI: 10.1016/j.foodchem.2015.09.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 09/09/2015] [Accepted: 09/12/2015] [Indexed: 10/23/2022]
Abstract
The crystalline states of fats, i.e., the crystallinity and crystal polymorphic types, strongly influence their physical properties in fat-based foods. Imaging of fat crystalline states has thus been a subject of abiding interest, but conventional techniques cannot image crystallinity and polymorphic types all at once. This article demonstrates a new technique using Raman microspectroscopy for simultaneously imaging the crystallinity and polymorphic types of fats. The crystallinity and β' crystal polymorph, which contribute to the hardness of fat-based food products, were quantitatively visualized in a model fat (porcine adipose tissue) by analyzing several key Raman bands. The emergence of the β crystal polymorph, which generally results in food product deterioration, was successfully imaged by analyzing the whole fingerprint regions of Raman spectra using multivariate curve resolution alternating least squares analysis. The results demonstrate that the crystalline states of fats can be nondestructively visualized and analyzed at the molecular level, in situ, without laborious sample pretreatments.
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Affiliation(s)
- Michiyo Motoyama
- NARO Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Ikenodai 2, Tsukuba, Ibaraki 305-0901, Japan.
| | - Masahiro Ando
- Consolidated Research Institute for Advanced Science and Medical Care, Waseda University, Wakamatsuchou 2-2, Shinjuku, Tokyo 162-8480, Japan
| | - Keisuke Sasaki
- NARO Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Ikenodai 2, Tsukuba, Ibaraki 305-0901, Japan
| | - Ikuyo Nakajima
- NARO Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Ikenodai 2, Tsukuba, Ibaraki 305-0901, Japan
| | - Koichi Chikuni
- NARO Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Ikenodai 2, Tsukuba, Ibaraki 305-0901, Japan
| | - Katsuhiro Aikawa
- NARO Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Ikenodai 2, Tsukuba, Ibaraki 305-0901, Japan
| | - Hiro-O Hamaguchi
- Consolidated Research Institute for Advanced Science and Medical Care, Waseda University, Wakamatsuchou 2-2, Shinjuku, Tokyo 162-8480, Japan; Department of Applied Chemistry, College of Science, National Chiao Tung University, Taiwan, 1001 University Road, Hsinchu 300, Taiwan, Republic of China
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Steen L, Rigolle A, Glorieux S, Paelinck H, Fraeye I, Goderis B, Foubert I. Isothermal crystallization behavior of lard at different temperatures studied by DSC and real-time XRD. Food Res Int 2015. [DOI: 10.1016/j.foodres.2014.12.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Arifin M, Swedlund PJ, Hemar Y, McKinnon IR. Calcium phosphates in Ca(2+)-fortified milk: phase identification and quantification by Raman spectroscopy. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:12223-8. [PMID: 25414967 DOI: 10.1021/jf503602n] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Calcium phosphate nanoclusters (CPNs) are important for the structure, function, and nutrient density of many dairy products. Phosphorylated amino acids in caseins stabilize calcium phosphate as nanoclusters which are amorphous to X-ray diffraction and exist within casein micelles, and these CPNs play a key role in micelle stability. Addition of calcium to milk results in further calcium phosphate removal from the serum, and there is uncertainty about the nature of the material formed and its stability. In this work we investigate both the solution and colloidal phases in CaCl2 enriched bovine milk to identify, quantify, and determine the solubility of the calcium phosphate material formed in response to calcium addition to milk. The P-O stretching bands are quite distinct in the Raman spectra of the main synthetic calcium phosphate mineral phases, including the amorphous calcium phosphate phase. In response to adding between 5 and 40 mM CaCl2 to milk, the serum phosphate concentration decreased asymptotically from 7.5 ± 0.2 to 0.54 ± 0.05 mM. Using Raman spectroscopy with a combination of internal and external standards, it was possible to show that the calcium phosphate material formed after Ca(2+) addition to milk was the same as amorphous calcium phosphate nanoclusters present in the absence of added calcium. The use of an internal standard allowed a quantitative analysis of the spectra which demonstrated that the amorphous calcium phosphate formed accounted for all of the calcium and phosphate that was removed from solution in response to calcium addition.
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Affiliation(s)
- Martha Arifin
- School of Chemical Sciences, University of Auckland , Private Bag 92019, Auckland, New Zealand
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