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Offroy M, Marchetti M, Kauffmann TH, Bourson P, Duponchel L, Savarese L, Mechling JM. Using clustering as pre-processing in the framework of signal unmixing for exhaustive exploration of archaeological artefacts in Raman imaging. Talanta 2024; 274:125955. [PMID: 38552475 DOI: 10.1016/j.talanta.2024.125955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 03/14/2024] [Accepted: 03/18/2024] [Indexed: 05/04/2024]
Abstract
Analytical chemistry on archaeological material is an essential part of modern archaeological investigations and from year to year, instrumental improvement has made it possible to generate data at a high spatial and temporal frequency. In particular, Raman spectral imaging can be successfully applied in archaeological research by its simplicity of implementation to study past human societies through the analysis of their material remains. This technique makes it possible to simultaneously obtain spatial and spectral information by preserving sample integrity. However, because of the inherent complexity of the samples in Archaeology (e.g. seniority, fragility, lack or full absence of any information about its composition), chemical interpretation can be difficult at first glance. Indeed, specific problems of spectral selectivity related to unexpected chemical compounds could appear due to their state of conservation. Furthermore, detecting minor compounds becomes challenging as major components impose their contributions in the acquired spectra. Therefore, a relevant chemometric approach has been introduced in this context to characterize distinct spectral sources in a Raman imaging dataset of an archaeological specimen - a mosaic fragment. The fragment was unearthed during the Ruscino archaeological dig on the outskirts of Perpignan, France. It dates back to the oppidum period. The aim is to extract selective spectral information from pixel clustering analysis in order to enhance the initial optimisation step within the Multivariate Curve Resolution and Alternating Least-Squares (MCR-ALS) algorithm, a well-known signal unmixing technique. The underlying principle of the MCR-ALS is that the acquired spectra can be expressed as linear combinations of pure spectra of all individual components present in the chemical system under study. Sometimes it can be difficult to obtain the desired results through the algorithm, particularly if initial estimates of spectral or concentration profiles are inaccurate due to complex signals, noise or lack of selectivity, resulting in rank deficiency (i.e. a poor estimation of the total number of pure signals). For this reason, an innovative threshold-based clustering algorithm, combined with multiple Orthogonal Projection Approaches (OPA), has been developed to improve matrix rank investigation and thus the initialisation step of the MCR-ALS approach before optimisation. The effective analysis of Raman imaging data for an archaeological mosaic played a crucial role in uncovering significant chemical information about a particular biogenic material. This insight sheds light on the origins of mortar manufacture during the oppidum period.
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Affiliation(s)
- Marc Offroy
- Université de Lorraine, CNRS, LIEC, F-54000, Nancy, France.
| | - Mario Marchetti
- Université Gustave Eiffel, MAST, FM2D, IFSTTAR, 14-20 Boulevard Newton, Cité Descartes, Champs sur Marne, F-77447, Marne La Vallée Cedex 2, France; Université de Lorraine, CNRS, IJL, F-54000, Nancy, France
| | | | - Patrice Bourson
- Université de Lorraine, CentraleSupelec, LMOPS, F-57000, Metz, France
| | | | - Laurent Savarese
- Centre de Recherches Archéologiques de Ruscino, Ville de Perpignan, Chercheur Associé UMR 5140 TESAM, France
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2
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Bashir A, Khan SR, Aqib AI, Shafique L, Ataya FS. Multifunctional integration of tungsten oxide (WO 3) coating: A versatile approach for enhanced performance of antibiotics against single mixed bacterial infections. Microb Pathog 2024; 189:106571. [PMID: 38341107 DOI: 10.1016/j.micpath.2024.106571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 01/25/2024] [Accepted: 02/07/2024] [Indexed: 02/12/2024]
Abstract
Nanomaterials containing tungsten (TNMs), characterized by diverse nanostructures had been extensively used in biomedical sector. Despite numerous reports focusing on TNM applications in specific biomedical areas, there is a noticeable absence of comprehensive studies that focused on detailed characterization of nanomaterials along with their biological applications. The present work described the structural, morphological, and antimicrobial properties of tungsten oxide (WO3) nanoparticles coated by antibiotics (nanobiotics), and their application on single and mixed bacterial culture. The nanobiotics included in this study were WO3 coated with ampicillin (W+A), WO3 coated with penicillin (P+W), and WO3 coated with ciprofloxacin (C+W). Techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray spectroscopy (EDX), Fourier transforms infrared spectroscopy (FTIR), Rrman spectroscopy, and UV-visible spectroscopy were used to characterize synthesized nanoparticles. The minimum inhibitory concentration of C+W nanobiotic against S. aureus, E. coli, and mixed culture (S. aureus +E. coli) was lower than that of P+W and A+W. The impact of incubation period showed significant differences for each of nanobiotic against S. aureus, E. coli, and mixed culture. However, there were also non-significant differences among incubation periods for antibacterial activity of nanobiotics. It was pertinent to note that percentage variation in susceptibility of S. aureus with respect to mixed culture remained higher as compared to E. coli, indicating it stronger candidate imposing resistance. This paper thus suggested the strategy of coating of antibiotics with with WO3 nanoparticles as an ideal combination for resistance modulation against single and mixed culture bacteria.
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Affiliation(s)
- Arslan Bashir
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Shanza Rauf Khan
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Amjad Islam Aqib
- Department of Medicine, Cholistan University of Veterinary and Animal Sciences, Bahawalpur, 63100, Pakistan.
| | - Laiba Shafique
- Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation, Beibu Gulf University, Guangxi, 535011, China
| | - Farid S Ataya
- Department of Biochemistry, College of Science, King Saud University, PO Box 2455, Riyadh, 11451, Saudi Arabia
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3
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Vaitiekūnaitė D, Dodoo D, Snitka V. Traceability of bilberries (Vaccinium myrtillus L.) of the Baltic-Nordic region using surface-enhanced Raman spectroscopy (SERS): DFT simulation-based DNA analysis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 288:122192. [PMID: 36493623 DOI: 10.1016/j.saa.2022.122192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 11/25/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
Food traceability is a major issue in the industry. We investigated whether bilberries (Vaccinium myrtillus L.) from 4 different locations within the Baltic-Nordic region could be effectively differentiated using surface-enhanced Raman scattering (SERS) based spectral data and chemometric analyses. Furthermore, we aimed to determine if nucleobase (adenine and cytosine) methylation could be responsible for any observed variation. Our experiment was successful in that both principal component (PCA) and discriminant function analyses (DFA) showed differentiation between bilberry DNA from all 4 geographical regions. Density functional theory (DFT) based simulations allowed us to analyze whether DNA's spectral data dissimilarities may be due to nucleobase methylation. Although results were inconclusive on this, our investigation provides valuable data on simulated versus experimental DNA and DNA component spectra. Further research will be directed towards understanding what other epigenetic changes could be responsible for the observed DNA variation as well as determining the optimal parameters for using DFT simulations in upcoming projects.
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Affiliation(s)
- Dorotėja Vaitiekūnaitė
- Lithuanian Research Centre for Agriculture and Forestry, Laboratory of Forest Plant Biotechnology Institute of Forestry, Liepu st. 1, LT-53101 Girionys, Lithuania.
| | - Daniel Dodoo
- Department of Chemical Engineering, The University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia.
| | - Valentinas Snitka
- Research Center for Microsystems and Nanotechnology, Kaunas University of Technology, Studentu str. 65, LT-51369 Kaunas, Lithuania.
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4
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Experimental spectroscopic investigations, solute-solvent interactions, topological analysis and biological evaluations of N-(9-Fluorenylmethoxycarbonyloxy)succinimide: An effective agent in anti-breast cancer activity. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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5
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Thirunavukkarasu M, Balaji G, Prabakaran P, Basha SJ, Irfan A, Javed SS, Muthu S. Spectral characterization, solvation effects on topological aspects, and biological attributes of Fmoc-L-glutamic acid 5-tert-butyl ester: An effective reagent in anticancer evaluations. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133793] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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6
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Rahmani-Moghadam E, Talaei-Khozani T, Zarrin V, Vojdani Z. Thymoquinone loading into hydroxyapatite/alginate scaffolds accelerated the osteogenic differentiation of the mesenchymal stem cells. Biomed Eng Online 2021; 20:76. [PMID: 34348708 PMCID: PMC8336257 DOI: 10.1186/s12938-021-00916-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 07/28/2021] [Indexed: 11/10/2022] Open
Abstract
Background Phytochemical agents such as thymoquinone (TQ) have osteogenic property. This study aimed to investigate the synergic impact of TQ and hydroxyapatite on mesenchymal stem cell differentiation. Alginate was also used as drug vehicle. Methods HA scaffolds were fabricated by casting into polyurethane foam and sintering at 800 °C, and then, 1250 °C and impregnated by TQ containing alginate. The adipose-derived stem cells were aliquoted into 4 groups: control, osteogenic induced-, TQ and osteogenic induced- and TQ-treated cultures. Adipose derived-mesenchymal stem cells were mixed with alginate and loaded into the scaffolds Results The results showed that impregnation of HA scaffold with alginate decelerated the degradation rate and reinforced the mechanical strength. TQ loading in alginate/HA had no significant influence on physical and mechanical properties. Real-time RT-PCR showed significant elevation in collagen, osteopontin, and osteocalcin expression at early phase of differentiation. TQ also led to an increase in alkaline phosphatase activity. At long term, TQ administration had no impact on calcium deposition and proliferation rate as well as bone-marker expression. Conclusion TQ accelerates the differentiation of the stem cells into the osteoblasts, without changing the physical and mechanical properties of the scaffolds. TQ also showed a synergic influence on differentiation potential of mesenchymal stem cells.
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Affiliation(s)
- Ebrahim Rahmani-Moghadam
- Department of Anatomical Sciences, School of Medicine, Shiraz University of Medical Sciences, Imam Hussain Square, Zand St., Shiraz, Iran.,Tissue Engineering Lab, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Tahereh Talaei-Khozani
- Department of Anatomical Sciences, School of Medicine, Shiraz University of Medical Sciences, Imam Hussain Square, Zand St., Shiraz, Iran.,Tissue Engineering Lab, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Vahideh Zarrin
- Tissue Engineering Lab, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Zahra Vojdani
- Department of Anatomical Sciences, School of Medicine, Shiraz University of Medical Sciences, Imam Hussain Square, Zand St., Shiraz, Iran. .,Tissue Engineering Lab, Shiraz University of Medical Sciences, Shiraz, Iran.
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7
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Silva TCF, VergÜtz L, Pacheco AA, Melo LF, Renato NS, Melo LCA. Characterization and application of magnetic biochar for the removal of phosphorus from water. AN ACAD BRAS CIENC 2020; 92:e20190440. [PMID: 33206798 DOI: 10.1590/0001-3765202020190440] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 08/14/2019] [Indexed: 11/22/2022] Open
Abstract
Activated biochars were prepared from residues of medium density fiberboard (MDF) produced by the furniture industry. Biomass residue was pre-treated with FeCl3 in two different FeCl3:biomass ratios (0.5:1 and 1:1, w/w) aiming to produce a matrix embedded with iron oxide. The pyrolysis process produced maghemite on the biochar surface and its magnetic properties were confirmed by its attraction to a hand magnet and its magnetic susceptibility. Samples were also characterized using scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS), surface area by BET-N2, Fourier transform infrared (FTIR), X-ray diffraction, magnetic susceptibility, and cation exchange capacity (CEC). Magnetic biochar exhibited up to twelve-fold higher surface area than the non-magnetic biochar, which varies according the maghemite particles content. Iron oxide on biochar surface also contributed for increasing CEC around ten-fold compared to non-magnetic biochars. Phosphorus adsorption isotherms showed that these magnetic biochars have high capacity to sorb oxyanions like phosphate, especially at lower pH. Thus, these magnetic biochars could be used to clean water bodies contaminated with oxyanions in acidic conditions.
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Affiliation(s)
- Teresa Cristina F Silva
- State University of Minas Gerais at Ubá, Ave. Olegário Maciel, 1427, Industrial, 36500-000 Ubá, MG, Brazil
| | - Leonardus VergÜtz
- Federal University of Viçosa, Ave. PH Rolfs, s/n, Campus da UFV, 36570-900 Viçosa, MG, Brazil.,Mohammed VI Polytechnic University, UM6P, 43150, Ben Guerir, Morocco
| | - Anderson A Pacheco
- Federal University of Viçosa, Ave. PH Rolfs, s/n, Campus da UFV, 36570-900 Viçosa, MG, Brazil
| | - Larissa F Melo
- State University of Minas Gerais at Ubá, Ave. Olegário Maciel, 1427, Industrial, 36500-000 Ubá, MG, Brazil
| | - Natalia S Renato
- Federal University of Viçosa, Ave. PH Rolfs, s/n, Campus da UFV, 36570-900 Viçosa, MG, Brazil
| | - LeÔnidas C A Melo
- Federal University of Lavras, Campus da UFLA, Aquenta Sol, 37200-000 Lavras, MG, Brazil
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Bajwa J, Nawaz H, Majeed MI, Hussain AI, Farooq S, Rashid N, Bakkar MA, Ahmad S, Hyat H, Bashir S, Ali S, Kashif M. Quantitative analysis of solid dosage forms of cefixime using Raman spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 238:118446. [PMID: 32408230 DOI: 10.1016/j.saa.2020.118446] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/27/2020] [Accepted: 05/03/2020] [Indexed: 06/11/2023]
Abstract
Quantification of antibiotics is of significant importance because of their use in the prevention and treatment of different diseases. Cefixime (CEF) is a cephalosporin antibiotic that is used against bacterial infections. In the present study, Raman spectroscopy has been applied for the identification and quantification of Raman spectral features of cefixime with different concentrations of Active Pharmaceutical Ingredient (API) and excipients in solid dosage forms. The changes in Raman spectral features of API and excipients in the solid dosage forms of cefixime were studied and Raman peaks were assigned based on the literature. Multivariate data analysis techniques including the Principal Component Analysis (PCA) and Partial Least Squares Regression analysis (PLSR) have been performed for the qualitative and quantitative analysis of solid dosage forms of cefixime. PCA was found helpful in differentiating all the Raman spectral data associated with the different solid dosage forms of cefixime. The coefficient of determination (R2), mean absolute error (MAE), and mean relative error (MRE) for the calibration data-set were 0.99, 0.72, and 0.01 respectively and for the validation data-set were 0.99, 3.15, and 0.02 respectively, that shows the performance of the model. The root mean square error of calibration (RMSEC) and root mean square error of prediction (RMSEP) were found to be 0.56 mg and 3.13 mg respectively.
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Affiliation(s)
- Jawad Bajwa
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Haq Nawaz
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan.
| | | | | | - Sidra Farooq
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | - Nosheen Rashid
- Department of Chemistry, University of Central Punjab, Faisalabad Campus, Faisalabad, Pakistan
| | | | - Shamsheer Ahmad
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | - Hamza Hyat
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | - Saba Bashir
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | - Saqib Ali
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Kashif
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
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9
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Pazin WM, Furini LN, Solovyeva V, Lemma T, Rubira RJG, Jørgensen B, Constantino CJL, Brewer JR. Vibrational Spectroscopic Characterization and Coherent Anti-Stokes Raman Spectroscopy (CARS) Imaging of Artepillin C. APPLIED SPECTROSCOPY 2020; 74:751-757. [PMID: 32031016 DOI: 10.1177/0003702820904456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In the following work, the vibrational spectroscopic characteristics of artepillin C are reported by means of Fourier transform infrared (FT-IR) and Raman spectroscopies, surface-enhanced Raman scattering (SERS), and coherent anti-Stokes Raman scattering (CARS) microscopy. Artepillin C is an interesting compound due to its pharmacological properties, including antitumor activity. It is found as the major component of Brazilian green propolis, a resinous mixture produced by bees to protect their hives against intruders. Vibrational spectroscopic techniques have shown a strong peak at 1599 cm-1, assigned to C=C stretching vibrations from the aromatic ring of artepillin C. From these data, direct visualization of artepillin C could be assessed by means of CARS microscopy, showing differences in the film hydration obtained for its neutral and deprotonated states. Raman-based methods show potential to visualize the uptake and action of artepillin C in biological systems, triggering its interaction with biological systems that are needed to understand its mechanism of action.
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Affiliation(s)
- Wallance M Pazin
- Department of Biochemistry and Molecular Biology (BMB), University of Southern Denmark, Odense, Denmark
- Department of Physics, School of Technology and Applied Sciences, São Paulo State University, Presidente Prudente, Brazil
| | - Leonardo N Furini
- Department of Physics, School of Technology and Applied Sciences, São Paulo State University, Presidente Prudente, Brazil
- Department of Physics, Federal University of Ceará, Fortaleza, Brazil
| | - Vita Solovyeva
- Department of Biochemistry and Molecular Biology (BMB), University of Southern Denmark, Odense, Denmark
- Faculty of Mathematics and Science, University of Oldenburg, Oldenburg, Germany
| | - Tibebe Lemma
- Department of Physics, School of Technology and Applied Sciences, São Paulo State University, Presidente Prudente, Brazil
| | - Rafael J G Rubira
- Department of Physics, School of Technology and Applied Sciences, São Paulo State University, Presidente Prudente, Brazil
| | | | - Carlos J L Constantino
- Department of Physics, School of Technology and Applied Sciences, São Paulo State University, Presidente Prudente, Brazil
| | - Jonathan R Brewer
- Department of Biochemistry and Molecular Biology (BMB), University of Southern Denmark, Odense, Denmark
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10
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Synthesis and characterization of poly(methyl methacrylate)-boehmite nanocomposites by direct microemulsion polymerization combined with the in-situ sol-gel method. POLYMER 2019. [DOI: 10.1016/j.polymer.2018.12.053] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Umarani P, Thiruvalluvar A, Raja CR. A critical study of crystal structure, N—H---Br interaction, effect of charge transfer on third-order nonlinear optical properties and optical limiting behaviour of a new crystal: (4-Methoxyphenyl) methanaminium bromide. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.07.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Vaz WF, Custodio JMF, Rodrigues NMN, Santin LG, Oliveira SS, Gargano R, Osório FAP, Aquino GLB, Camargo AJ, Oliveira MS, Napolitano HB. A novel dihydrocoumarin under experimental and theoretical characterization. J Mol Model 2017; 23:315. [PMID: 29044437 DOI: 10.1007/s00894-017-3485-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 09/25/2017] [Indexed: 10/18/2022]
Abstract
Coumarins are natural and synthetic active ingredients widely applied in diverse types of medicinal treatments, such as cancer, inflammation, infection, and enzyme inhibition (monoamine oxidase B). Dihydrocoumarin compounds are of great interest in organic chemistry due to their structural versatilities and, as part of our investigations concerning the structural characterization of small molecules, this work focuses on crystal structure and spectroscopic characterization of the synthesized and crystallized compound 4-(4-methoxyphenyl)-3,4-dihydro-chromen-2-one (C16H14O3). Additionally, a theoretical calculation was performed using density functional theory to analyze the sites where nucleophilic or electrophilic attack took place and to examine the molecular electrostatic potential surface. Throughout all of these calculations, both density functional theory and Car-Parrinello molecular dynamics were performed by fully optimized geometry. The spectroscopic analysis indicated the presence of aromatic carbons and hydrogen atoms, and also the carbonyl and methoxy groups that were confirmed by the crystallographic structure. The C16H14O3 compound has a non-classical intermolecular interaction of type C-H⋅⋅⋅O that drives the molecular arrangement and the crystal packing. Moreover, the main absorbent groups were characterized throughout calculated harmonic vibrational frequencies. Also, natural bond orbital analysis successfully locates the molecular orbital with π-bonding symmetry and the molecular orbital with π* antibonding symmetry. Finally, the gap between highest occupied and lowest unoccupied molecular orbitals implies in a high kinetic stability and low chemical reactivity of title molecule.
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Affiliation(s)
- W F Vaz
- Universidade Estadual de Goiás, 75001-970, Anápolis, GO, Brazil.,Instituto Federal de Educação, Ciência e Tecnologia de Mato Grosso, 78455-000, Lucas do Rio Verde, MT, Brazil
| | - J M F Custodio
- Universidade Estadual de Goiás, 75001-970, Anápolis, GO, Brazil.,Universidade Federal de Goiás, 74690-900, Goiânia, GO, Brazil
| | - N M N Rodrigues
- Universidade Estadual de Goiás, 75001-970, Anápolis, GO, Brazil
| | - L G Santin
- Universidade Estadual de Goiás, 75001-970, Anápolis, GO, Brazil.,Universidade de Brasília, 70904-970, Brasília, DF, Brazil
| | - S S Oliveira
- Universidade Estadual de Goiás, 75001-970, Anápolis, GO, Brazil
| | - R Gargano
- Universidade de Brasília, 70904-970, Brasília, DF, Brazil
| | - F A P Osório
- Universidade Federal de Goiás, 74690-900, Goiânia, GO, Brazil.,Pontifícia Universidade Católica de Goiás, 74605-010, Goiânia, GO, Brazil
| | - G L B Aquino
- Universidade Estadual de Goiás, 75001-970, Anápolis, GO, Brazil
| | - A J Camargo
- Universidade Estadual de Goiás, 75001-970, Anápolis, GO, Brazil
| | - M S Oliveira
- Universidade Estadual de Goiás, 75001-970, Anápolis, GO, Brazil
| | - H B Napolitano
- Universidade Estadual de Goiás, 75001-970, Anápolis, GO, Brazil.
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13
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Kong D, Wilson LD. Synthesis and characterization of cellulose-goethite composites and their adsorption properties with roxarsone. Carbohydr Polym 2017; 169:282-294. [DOI: 10.1016/j.carbpol.2017.04.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 03/22/2017] [Accepted: 04/10/2017] [Indexed: 11/24/2022]
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14
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Substitution effect on a hydroxylated chalcone: Conformational, topological and theoretical studies. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.01.076] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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15
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Valverde C, Vaz WF, Custodio JMF, Duarte VS, Carvalho-Jr PS, Figueredo AS, de Aquino GLB, Baseia B, Napolitano HB. The solid state structure and environmental polarization effect of a novel asymmetric azine. NEW J CHEM 2017. [DOI: 10.1039/c7nj00618g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Extensive solid state characterization of a novel asymmetric azine and its environmental polarization effect is reported.
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Affiliation(s)
- Clodoaldo Valverde
- Ciências Exatas e Tecnológicas
- Universidade Estadual de Goiás. 459
- Anápolis
- Brazil
- Centro Universitário de Anápolis
| | - Wesley F. Vaz
- Ciências Exatas e Tecnológicas
- Universidade Estadual de Goiás. 459
- Anápolis
- Brazil
- Instituto Federal de Educação, Ciência e Tecnologia de Mato Grosso
| | - Jean M. F. Custodio
- Ciências Exatas e Tecnológicas
- Universidade Estadual de Goiás. 459
- Anápolis
- Brazil
| | - Vitor S. Duarte
- Ciências Exatas e Tecnológicas
- Universidade Estadual de Goiás. 459
- Anápolis
- Brazil
| | | | - Andreza S. Figueredo
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto
- Universidade de São Paulo
- Ribeirão Preto
- Brazil
| | | | - Basílio Baseia
- Instituto de Física
- Universidade Federal de Goiás
- Goiânia
- Brazil
- Departamento de Física
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16
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Kumru M, Altun A, Kocademir M, Küçük V, Bardakçı T, Şaşmaz İ. Combined experimental and quantum chemical studies on spectroscopic (FT-IR, FT-Raman, UV–Vis, and NMR) and structural characteristics of quinoline-5-carboxaldehyde. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.06.066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Agrawal M, Deval V, Gupta A, Sangala BR, Prabhu SS. Evaluation of structure-reactivity descriptors and biological activity spectra of 4-(6-methoxy-2-naphthyl)-2-butanone using spectroscopic techniques. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 167:142-156. [PMID: 27284764 DOI: 10.1016/j.saa.2016.04.053] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 04/15/2016] [Accepted: 04/27/2016] [Indexed: 06/06/2023]
Abstract
The structure and several spectroscopic features along with reactivity parameters of the compound 4-(6-methoxy-2-naphthyl)-2-butanone (Nabumetone) have been studied using experimental techniques and tools derived from quantum chemical calculations. Structure optimization is followed by force field calculations based on density functional theory (DFT) at the B3LYP/6-311++G(d,p) level of theory. The vibrational spectra have been interpreted with the aid of normal coordinate analysis. UV-visible spectrum and the effect of solvent have been discussed. The electronic properties such as HOMO and LUMO energies have been determined by TD-DFT approach. In order to understand various aspects of pharmacological sciences several new chemical reactivity descriptors - chemical potential, global hardness and electrophilicity have been evaluated. Local reactivity descriptors - Fukui functions and local softnesses have also been calculated to find out the reactive sites within molecule. Aqueous solubility and lipophilicity have been calculated which are crucial for estimating transport properties of organic molecules in drug development. Estimation of biological effects, toxic/side effects has been made on the basis of prediction of activity spectra for substances (PASS) prediction results and their analysis by Pharma Expert software. Using the THz-TDS technique, the frequency-dependent absorptions of NBM have been measured in the frequency range up to 3THz.
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Affiliation(s)
- Megha Agrawal
- Department of Applied Physics, Faculty of Engineering & Technology, M. J. P. Rohilkhand University, Bareilly, India
| | - Vipin Deval
- Department of Applied Physics, Faculty of Engineering & Technology, M. J. P. Rohilkhand University, Bareilly, India
| | - Archana Gupta
- Department of Applied Physics, Faculty of Engineering & Technology, M. J. P. Rohilkhand University, Bareilly, India.
| | | | - S S Prabhu
- Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, India
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Vaz WF, Custodio JMF, Silveira RG, Castro AN, Campos CEM, Anjos MM, Oliveira GR, Valverde C, Baseia B, Napolitano HB. Synthesis, characterization, and third-order nonlinear optical properties of a new neolignane analogue. RSC Adv 2016. [DOI: 10.1039/c6ra14961h] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
This paper presents an extensive study of a new neolignane analogue using experimental and theoretical approach and brings highlights in solid state characterization and electronic properties.
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Affiliation(s)
- Wesley F. Vaz
- Instituto Federal de Educação
- Ciência e Tecnologia de Mato Grosso
- Lucas do Rio Verde
- Brazil
- Ciências Exatas e Tecnológicas
| | | | - Rafael G. Silveira
- Departamento de Química
- Universidade Federal de São Carlos
- São Carlos
- Brazil
| | - Adailton N. Castro
- Ciências Exatas e Tecnológicas
- Universidade Estadual de Goiás
- Anápolis
- Brazil
| | - Carlos E. M. Campos
- Departamento de Física
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | - Murilo M. Anjos
- Instituto de Química
- Universidade Federal de Goiás
- Goiânia
- Brazil
| | | | - Clodoaldo Valverde
- Ciências Exatas e Tecnológicas
- Universidade Estadual de Goiás
- Anápolis
- Brazil
- Escola Superior Associada de Goiânia (ESUP)
| | - Basílio Baseia
- Instituto de Física
- Universidade Federal de Goiás
- Goiânia
- Brazil
- Departamento de Física
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19
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Anitha R, Gunasekaran M, Kumar SS, Athimoolam S, Sridhar B. Single crystal XRD, vibrational and quantum chemical calculation of pharmaceutical drug paracetamol: A new synthesis form. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 150:488-498. [PMID: 26072380 DOI: 10.1016/j.saa.2015.05.091] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 05/20/2015] [Accepted: 05/24/2015] [Indexed: 06/04/2023]
Abstract
The common house hold pharmaceutical drug, paracetamol (PAR), has been synthesized from 4-chloroaniline as a first ever report. After the synthesis, good quality single crystals were obtained for slow evaporation technique under the room temperature. The crystal and molecular structures were re-determined by the single crystal X-ray diffraction. The vibrational spectral measurements were carried out using FT-IR and FT-Raman spectroscopy in the range of 4000-400 cm(-1). The single crystal X-ray studies shows that the drug crystallized in the monoclinic system polymorph (Form-I). The crystal packing is dominated by N-H⋯O and O-H⋯O classical hydrogen bonds. The ac diagonal of the unit cell features two chain C(7) and C(9) motifs running in the opposite directions. These two chain motifs are cross-linked to each other to form a ring R4(4)(22) motif and a chain C2(2)(6) motif which is running along the a-axis of the unit cell. Along with the classical hydrogen bonds, the methyl group forms a weak C-H⋯O interactions in the crystal packing. It offers the support for molecular assembly especially in the hydrophilic regions. Further, the strength of the hydrogen bonds are studied the shifting of vibrational bands. Geometrical optimizations of the drug molecule were done by the Density Functional Theory (DFT) using the B3LYP function and Hartree-Fock (HF) level with 6-311++G(d,p) basis set. The optimized molecular geometry and computed vibrational spectra are compared with experimental results which show significant agreement. The factor group analysis of the molecule was carried out by the various molecular symmetry, site and factor group species using the standard correlation method. The Natural Bond Orbital (NBO) analysis was carried out to interpret hyperconjugative interaction and intramolecular charge transfer (ICT). The chemical softness, chemical hardness, electro-negativity, chemical potential and electrophilicity index of the molecule were found out first time by HOMO-LUMO plot. The frontier orbitals shows lower band gap values signify the possible biological/pharmaceutical activity of the molecule. The thermodynamical properties are also obtained from the calculated frequencies of the optimized structures.
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Affiliation(s)
- R Anitha
- Department of Physics, Regional Centre, Anna University Tirunelveli Region, Tirunelveli 627 007, India
| | - M Gunasekaran
- Department of Physics, Regional Centre, Anna University Tirunelveli Region, Tirunelveli 627 007, India
| | - S Suresh Kumar
- Department of Physics, University College of Engineering Nagercoil, Anna University, Nagercoil 629 004, India
| | - S Athimoolam
- Department of Physics, University College of Engineering Nagercoil, Anna University, Nagercoil 629 004, India.
| | - B Sridhar
- Laboratory of X-ray Crystallography, Indian Institute of Chemical Technology, Hyderabad 500 007, India
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Guo Z, Zhang Z, Zhang W, Zhou L, Li H, Wang H, Andreazza-Vignolle C, Andreazza P, Zhao D, Wu Y, Wang Q, Zhang T, Jiang K. Color-switchable, emission-enhanced fluorescence realized by engineering C-dot@C-dot nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2014; 6:20700-20708. [PMID: 25408428 DOI: 10.1021/am5071078] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This paper reports the preparation and properties of color-switchable fluorescent carbon nanodots (C-dots). C-dots that emit dark turquoise and green-yellow fluorescence under 365 nm UV illumination were obtained from the hydrothermal decomposition of citric acid. Dark green fluorescent C-dots were obtained by conjugating prepared C-dots to form C-dot@C-dot nanoparticles. After successful conjugation of the C-dots, the fluorescence emission undergoes a blue-shift of nearly 20 nm (∼0.15 eV) under UV excitation at 370 nm. The C-dots emit goldenrod, green-yellow, and gold light under excitation at 455 nm, which shows that the prepared C-dots are color-switchable. Furthermore, conjugation of the C-dots results in enhanced, red-shifted absorption of the π-π* transition of the aromatic sp(2) domains due to the conjugated π-electron system. N incorporation in the carbon structure leads to a degree of dipoles for all the aromatic sp(2) bonds. The enhanced absorption in a wide range from 226 to 601 nm indicates extended conjugation in the C-dot@C-dot structure. The time-resolved average lifetimes for the three different types of C-dots prepared in this study are 7.10, 7.65, and 4.07 ns. The radiative rate (reduced decay lifetime) increases when the C-dots are conjugated in the C-dot@C-dot nanoparticles, leading to the enhanced fluorescence emission. The fluorescence emission of the C-dot@C-dot nanoparticles can be used in applications such as flow cytometry and cell imaging.
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Affiliation(s)
- Zhen Guo
- CAS Key Lab of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences , No. 88, Keling Road, Suzhou New District 215163, People's Republic of China
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Kumar A, Deval V, Tandon P, Gupta A, Deepak D'silva E. Experimental and theoretical (FT-IR, FT-Raman, UV-vis, NMR) spectroscopic analysis and first order hyperpolarizability studies of non-linear optical material: (2E)-3-[4-(methylsulfanyl) phenyl]-1-(4-nitrophenyl) prop-2-en-1-one using density functional theory. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 130:41-53. [PMID: 24762572 DOI: 10.1016/j.saa.2014.03.072] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 03/01/2014] [Accepted: 03/21/2014] [Indexed: 06/03/2023]
Abstract
A combined experimental and theoretical investigation on FT-IR, FT-Raman, NMR, UV-vis spectra of a chalcone derivative (2E)-3-[4-(methylsulfanyl) phenyl]-1-(4-nitrophenyl) prop-2-en-1-one (4N4MSP) has been reported. 4N4MSP has two planar rings connected through conjugated double bond and it provides a necessary configuration to show non-linear optical (NLO) response. The molecular structure, fundamental vibrational frequencies and intensity of the vibrational bands are interpreted with the aid of structure optimizations and normal coordinate force field calculations based on density functional theory (DFT) with B3LYP functional and 6-311++G(d,p) basis set combination. The analysis of the fundamental modes was made with the help of potential energy distribution (PED). Molecular electrostatic potential (MEP) surface was plotted over the geometry primarily for predicting sites and relative reactivities towards electrophilic and nucleophilic attack. The delocalization of electron density of various constituents of the molecule has been discussed with the aid of NBO analysis. The electronic properties, such as excitation energies, oscillator strength, wavelengths, HOMO and LUMO energies, were calculated by time-dependent density functional theory (TD-DFT) and the results complement the experimental findings. The recorded and calculated 1H chemical shifts in gas phase and MeOD solution are gathered for reliable calculations of magnetic properties. Thermodynamic properties like heat capacity (C°p,m), entropy (S°m), enthalpy (H°m) have been calculated for the molecule at the different temperatures. Based on the finite-field approach, the non-linear optical (NLO) parameters such as dipole moment, mean polarizability, anisotropy of polarizability and first order hyperpolarizability of 4N4MSP molecule are calculated. The predicted first hyperpolarizability shows that the molecule has a reasonably good nonlinear optical (NLO) behavior.
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Affiliation(s)
- Amit Kumar
- Department of Physics, University of Lucknow, Lucknow, India; Department of Applied Physics, Faculty of Engineering and Technology, M.J.P. Rohilkhand University, Bareilly, India
| | - Vipin Deval
- Department of Applied Physics, Faculty of Engineering and Technology, M.J.P. Rohilkhand University, Bareilly, India
| | - Poonam Tandon
- Department of Physics, University of Lucknow, Lucknow, India
| | - Archana Gupta
- Department of Applied Physics, Faculty of Engineering and Technology, M.J.P. Rohilkhand University, Bareilly, India.
| | - E Deepak D'silva
- Department of Physics, Center for Post Graduate Studies and Research, St. Philomena College, Puttur, India
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Müller C, Glamuzina B, Pozniak I, Weber K, Cialla D, Popp J, Cîntă Pînzaru S. Amnesic shellfish poisoning biotoxin detection in seawater using pure or amino-functionalized Ag nanoparticles and SERS. Talanta 2014; 130:108-15. [PMID: 25159386 DOI: 10.1016/j.talanta.2014.06.059] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 06/19/2014] [Accepted: 06/26/2014] [Indexed: 10/25/2022]
Abstract
Domoic acid (DA) biotoxin responsible for the amnesic shellfish poisoning (ASP) has been unambiguously detected in seawater in a broad range of concentration, with both pure and amino-functionalized Ag nanoparticles employed for surface enhanced Raman scattering (SERS). To achieve this, a comprehensive SERS study on DA dissolved in distilled water has been conducted. SERS of DA dissolved in seawater in concentrations ranging from 3.3 × 10(-4) to 3.3 × 10(-8) mol l(-1) exhibited specific signal, completely different to those of the corresponding DA aqueous solutions, due to the seawater interference in the overall SERS effect. In order to assess the capability of the technique as a cheaper alternative for rapid and unambiguous detection of the DA biotoxin in seawater, three detection schemes have been proposed. DA was detectable at 0.33 nmoll(-1) concentration (0.33) dissolved in distilled water and 0.033 nmol l(-1) (0.033 ppb) in seawater respectively, much lower than the admitted level by the current regulation. A solvent specific interaction of DA with the NPs was concluded, since DA aqueous solution added to Ag nanoparticles provided different SERS signal compared to that of DA directly dissolved in seawater. Employing amino-functionalized Ag nanoparticles with 4-aminothiophenol as SERS tag, SERS signal of DA on amino-AgNPs revealed significant specificity associated with the aromatic primary amine interaction of the SERS tag with DA, thus allowing DA detection in seawater at 4.16 × 10(-4) mol l(-1) concentration, much higher than in the case of pure NPs. To highlight the findings, a brief literature review to date on the DA biotoxin detection was also provided.
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Affiliation(s)
- Csilla Müller
- Babeş-Bolyai University, Biomedical Physics, Theoretical and Molecular Spectroscopy Department, Kogălniceanu 1, 400084 Cluj Napoca, Romania
| | - Branko Glamuzina
- University of Dubrovnik, Department for Aquaculture, Ćira Carića 4, 20000 Dubrovnik, Croatia
| | - Iva Pozniak
- University of Dubrovnik, Department for Aquaculture, Ćira Carića 4, 20000 Dubrovnik, Croatia
| | - Karina Weber
- Friedrich-Schiller-University, Institute of Physical Chemistry, Helmholtzweg 4, 07743 Jena, Germany; Institute of Photonics Technology, Albert-Einstein-Strasse, 9, 07745 Jena, Germany
| | - Dana Cialla
- Friedrich-Schiller-University, Institute of Physical Chemistry, Helmholtzweg 4, 07743 Jena, Germany; Institute of Photonics Technology, Albert-Einstein-Strasse, 9, 07745 Jena, Germany
| | - Jürgen Popp
- Friedrich-Schiller-University, Institute of Physical Chemistry, Helmholtzweg 4, 07743 Jena, Germany; Institute of Photonics Technology, Albert-Einstein-Strasse, 9, 07745 Jena, Germany
| | - Simona Cîntă Pînzaru
- Babeş-Bolyai University, Biomedical Physics, Theoretical and Molecular Spectroscopy Department, Kogălniceanu 1, 400084 Cluj Napoca, Romania.
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Parejiya PB, Barot BS, Patel HK, Shelat PK, Shukla A. Innovation of novel ‘Tab in Tab’ system for release modulation of milnacipran HCl: optimization, formulation and in vitro investigations. Drug Dev Ind Pharm 2012; 39:1851-63. [DOI: 10.3109/03639045.2012.738686] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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