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Abstract
Construction activity with a huge variety of structures, forms and conditions underlying the implementation of construction projects, require special management approach. Decisions are most often made at the planning and preparation stage of a construction project. The literature on the subject includes descriptions of decision support methods and models, including single-criteria and multi-criteria models, operations research and fuzzy models. Different models can be used in different situations. The article contains an analysis of model approaches proposed in the literature, confronted with decision-making processes in engineering practice. The study covered 34 construction projects and 15 companies operating in the construction industry. Several decision situations have been considered. The research carried out in accordance with the seven-stage research process has shown that although the various methods proposed in the cited sources can be used in the implementation of engineering projects, they require modification to suit the specificity of engineering practice. The results of the research are the decision support models proposed by the authors, adapted to the conditions in which construction projects are implemented. In the case of small and relatively simple construction projects, simplified models are usually used, where the use of the last steps of verifying the results and improving the applied model is limited. Large and more complex construction projects were often accompanied by a decision support system consisting of more stages, and in these cases, it turned out to be important to obtain feedback and to refine the decision model accordingly. Research has shown that in large projects it is important to obtain feedback. This is due to, inter alia, from the fact that the implementation of these projects involves much greater financial resources than in small and medium-sized projects. Decision-makers take much more care to verify the correctness of the model, because the effects of wrongly made decisions can be much more severe than in the case of small and medium-sized enterprises. If it is necessary to make strategic decisions related to the future of a given company, attention was paid to models in which the starting point was to clearly define the goal and collect a complete set of information about the decision-making environment. Various analytical and research methods were used, but feedback was always needed to improve the final solution. The observations obtained during the research helped the authors to develop decision support models dedicated to engineering practice that may be useful in the implementation of construction projects.
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102
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Optimized Identification of Triacylglycerols in Milk by HPLC-HRMS. FOOD ANAL METHOD 2022. [DOI: 10.1007/s12161-022-02270-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AbstractThis work has developed an optimized workflow for the targeted analysis of triacylglycerols (TAGs) in milk by liquid chromatography coupled with a Q-Exactive Orbitrap mass spectrometer. First, the effects of resolution (17,500; 35,000; 70,000; 140,000) and automatic gain control target (AGC, from 2×104, 2×105, 1×106, and 3×106) have been optimized with the goal to minimize the injection time, maximize the number of scans, and minimize the mass error. Then, the flow rate of the liquid chromatography system was also optimized by maximizing the number of theoretical plates. The resulting optimized parameters consisted of a flow rate of 200 μL/min, mass resolution of 35,000, and AGC target of 2×105. Such optimal conditions were applied for targeted TAG analysis of milk fat extracts. Up to 14 target triglycerides in milk fat were identified performing a data-dependent HPLC-HRMS-MS2 experiment (t-SIM-ddMS2). The findings reported here can be helpful for MS-based lipidomic workflows and targeted milk lipid analysis.
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103
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Validated Kinetic Spectrophotometric Methods to Optimize Robustness Study with Youden Factorial Combinations to Determine Repaglinide Using Response Surface Methodology via Box–Behnken Design. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2022. [DOI: 10.1007/s13369-022-06782-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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104
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Kritikos N, Iliou A, Kalampaliki AD, Gikas E, Kostakis IK, Michel BY, Dotsikas Y. Chemometrically Assisted Optimization of Pregabalin Fluorescent Derivatization Reaction with a Novel Xanthone Analogue and Validation of the Method for the Determination of Pregabalin in Bulk via a Plate Reader. Molecules 2022; 27:molecules27061954. [PMID: 35335315 PMCID: PMC8954069 DOI: 10.3390/molecules27061954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 02/25/2022] [Accepted: 03/14/2022] [Indexed: 02/04/2023] Open
Abstract
Quantitation of chromophore-free analytes is always a challenge. To this purpose, derivatization of the analyte constitutes a common strategy, leading to a product with a strong signal. In the current study, a novel xanthone analogue was utilized for the first time for the derivatization of pregabalin, a model analyte with a primary amine moiety that lacks a chromophore. The fact that only the xanthene-based derivative, formed after the derivatization reaction fluoresces, enables avoiding its chromatographic separation from the reagent and thus reducing the analysis time of a series of samples in 1–2 min via a plate reader. The reaction conditions were optimized via a central composite design (CCD), with fluorescence signal as the measure of the yield. The following factors that affect the derivatization reaction were chosen: (a) temperature, (b) reaction time, and (c) triethylamine solution volume used to drive the reaction to completion. After the identification of the optimal conditions, the method was validated according to ICH guidelines, using a fluorescence plate reader for signal measurement (λex = 540, λem = 615 nm). Finally, the newly developed high-throughput method was applied to the determination of drug content in pregabalin bulk.
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Affiliation(s)
- Nikolaos Kritikos
- Laboratory of Pharmaceutical Analysis, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupoli Zografou, GR-157 71 Athens, Greece; (N.K.); (A.I.)
| | - Aikaterini Iliou
- Laboratory of Pharmaceutical Analysis, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupoli Zografou, GR-157 71 Athens, Greece; (N.K.); (A.I.)
| | - Amalia D. Kalampaliki
- Division of Pharmaceutical Chemistry, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupoli Zografou, GR-157 71 Athens, Greece; (A.D.K.); (I.K.K.)
| | - Evangelos Gikas
- Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimioupoli Zografou, GR-157 71 Athens, Greece;
| | - Ioannis K. Kostakis
- Division of Pharmaceutical Chemistry, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupoli Zografou, GR-157 71 Athens, Greece; (A.D.K.); (I.K.K.)
| | - Benoît Y. Michel
- Institut de Chimie de Nice, CNRS, UMR 7272, Université Côte d’Azur, Parc Valrose, CEDEX 2, 06108 Nice, France;
| | - Yannis Dotsikas
- Laboratory of Pharmaceutical Analysis, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimioupoli Zografou, GR-157 71 Athens, Greece; (N.K.); (A.I.)
- Correspondence: ; Tel.: +30-2107274696
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105
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Optimization of reaction parameters by using response surface methodology (RSM) for the selective dehydration of glucose to 5-hydroxymethylfurfural (5-HMF), a valuable platform chemical over a mesoporous TiO2 catalyst in dimethylsulfoxide (DMSO) medium. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.03.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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106
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Chromatographic method development for the simultaneous assay of pseudoephedrine hydrochloride and chlorphenamine maleate in oral dosage formulations. SCIENTIFIC AFRICAN 2022. [DOI: 10.1016/j.sciaf.2022.e01109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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107
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Analytical Quality-by-Design optimization of UHPLC method for the analysis of octreotide release from a peptide-based hydrogel in-vitro. J Pharm Biomed Anal 2022; 214:114699. [DOI: 10.1016/j.jpba.2022.114699] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 02/28/2022] [Accepted: 02/28/2022] [Indexed: 11/17/2022]
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108
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Pusfitasari ED, Ruiz-Jimenez J, Heiskanen I, Jussila M, Hartonen K, Riekkola ML. Aerial drone furnished with miniaturized versatile air sampling systems for selective collection of nitrogen containing compounds in boreal forest. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 808:152011. [PMID: 34861308 DOI: 10.1016/j.scitotenv.2021.152011] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/21/2021] [Accepted: 11/23/2021] [Indexed: 06/13/2023]
Abstract
A wide variety of nitrogen-containing compounds are present in the environment, which contributes to air pollution and new particle formation, for example. These eventually affect human health and the climate. With all this consideration, there is a growing interest in the development of efficient and reliable methods to determine these compounds in the atmosphere. In this study, titanium hydrogen phosphate-modified Mobil Composition of Matter No. 41 was used as sorbent material for in-tube extraction (ITEX) sampling system, to selectively collect nitrogen-containing compounds from natural air samples. The effect of sampling accessories, based on adsorbent coatings (with Tenax-GR as an adsorbent material) and polytetrafluoroethylene filters, was studied to improve the selectivity of the sampling system and to remove particles. Aerial drone with miniaturized air sampling system was employed for the reliable collection of nitrogen-containing compounds in both gas phase and aerosol particles. A total of 170 air samples were collected in July 2020 at the SMEAR II station, Finland to evaluate nitrogen-containing compounds diurnal patterns and vertical profiles (0.25, 5, 50, and 150 m). More than twenty nitrogen-containing compounds, such as aliphatic amines, imines, imidazoles, and pyridines, were identified, quantified or semi-quantified. The average concentrations of detected aliphatic amines at the altitude of 50 m were up to 40.4 ng m-3 (dimethylamine) in gas phase and 128 ng m-3 (ethylamine) in aerosol particles. Among nitrogen-containing compounds detected, pyridine gave the highest average concentration of 746 ng m-3 in gas phase and 644 ng m-3 in particle phase.
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Affiliation(s)
- Eka Dian Pusfitasari
- Department of Chemistry and Institute for Atmospheric and Earth System Research, P.O. Box 55, FI-00014, University of Helsinki, Finland
| | - Jose Ruiz-Jimenez
- Department of Chemistry and Institute for Atmospheric and Earth System Research, P.O. Box 55, FI-00014, University of Helsinki, Finland
| | - Ilmari Heiskanen
- Department of Chemistry and Institute for Atmospheric and Earth System Research, P.O. Box 55, FI-00014, University of Helsinki, Finland
| | - Matti Jussila
- Department of Chemistry and Institute for Atmospheric and Earth System Research, P.O. Box 55, FI-00014, University of Helsinki, Finland
| | - Kari Hartonen
- Department of Chemistry and Institute for Atmospheric and Earth System Research, P.O. Box 55, FI-00014, University of Helsinki, Finland
| | - Marja-Liisa Riekkola
- Department of Chemistry and Institute for Atmospheric and Earth System Research, P.O. Box 55, FI-00014, University of Helsinki, Finland.
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109
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Ospina‐Casas K, Laguado‐Escobar D, Narváez‐Cuenca C. Using a mixture of hydrocolloids to mimic texture and rheological properties of a massive consumption food product. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16440] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Karen‐Gisseth Ospina‐Casas
- Universidad Nacional de Colombia Sede Bogotá, Facultad de agronomía, Departamento de Ciencias Agrarias Bogotá Colombia
- Área de investigación, Desarrollo e innovación Bogotá DC Colombia
| | | | - Carlos‐Eduardo Narváez‐Cuenca
- Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Química Food Chemistry Research Group Bogotá Colombia
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110
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Mehta SB, Cook J, Liu W, Brisbane C. Risk Mitigation of Plunger-Stopper Displacement under Low Atmospheric Pressure by establishing Design Space for Filling-Stoppering Process of Prefilled Syringes: A Design of Experiment (DoE) Approach. J Pharm Sci 2022; 111:2038-2048. [PMID: 35122830 DOI: 10.1016/j.xphs.2022.01.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 01/27/2022] [Accepted: 01/27/2022] [Indexed: 10/19/2022]
Abstract
There is a concern that low atmospheric pressure typically encountered during shipment could result in plunger-stopper displacement in prefilled syringes impacting sterility and container closure integrity (CCI) of drug product1. In this work, following DoE principles we first investigated the impact of filling and stoppering operating parameters on creation of bubble height as performance parameters among others in nominal 1 mL and 2.25 mL Type I glass prefilled syringes (PFSs) with staked needle and rigid needle shield (RNS). Bubble height ranging from <2.0 mm to >15.0 mm were produced in syringes by filling water and vacuum stoppering at operating vacuum pressure ranging from 400 mbar to 950 mbar using a pilot scale filling-stoppering machine. We found that for a particular nominal fill volume in prefilled syringe, as the stoppering vacuum pressure increased, bubble height decreased resulting in plunger-stopper placed closer to the fill level. Subsequently, syringes with varying bubble size were exposed to reduced atmospheric pressure ranging from 628 Torr to 293 Torr bracketing the low pressure recommended by ASTM D4169 standard to qualify shipping containers for transportation of drug products. We found inverse linear correlation between bubble height and plunger-stopper displacement under low atmospheric pressure. However, plunger-stopper displacement increased exponentially as atmospheric pressure decreased. The results suggest that air bubble size in filled glass syringes should be minimized in order to mitigate sterility and container closure integrity (CCI) risk to drug product in prefilled syringes.
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Affiliation(s)
- Shyam B Mehta
- Drug Product Development and Operations, Biologics CMC, Teva Branded Pharmaceutical Products R&D, West Chester, PA 19380.
| | - Joseph Cook
- Drug Product Development and Operations, Biologics CMC, Teva Branded Pharmaceutical Products R&D, West Chester, PA 19380
| | - Wei Liu
- Drug Product Development and Operations, Biologics CMC, Teva Branded Pharmaceutical Products R&D, West Chester, PA 19380
| | - Charlene Brisbane
- Drug Product Development and Operations, Biologics CMC, Teva Branded Pharmaceutical Products R&D, West Chester, PA 19380
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111
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Natural deep eutectic solvent: A novelty alternative as multi-walled carbon nanotubes dispersing agent for the determination of paracetamol in urine. Talanta 2022; 242:123290. [DOI: 10.1016/j.talanta.2022.123290] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 12/10/2021] [Accepted: 02/03/2022] [Indexed: 12/19/2022]
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112
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Application of Optimization and Modeling for the Enhancement of Composting Processes. Processes (Basel) 2022. [DOI: 10.3390/pr10020229] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Composting is a more environmentally friendly and cost-effective alternative to digesting organic waste and turning it into organic fertilizer. It is a biological process in which polymeric waste materials contained in organic waste are biodegraded by fungi and bacteria. Temperature, pH, moisture content, C/N ratio, particle size, nutrient content and oxygen supply all have an impact on the efficiency of the composting process. To achieve optimal composting efficiency, all of these variables and their interactions must be considered. To this end, statistical optimization techniques and mathematical modeling approaches have been developed over the years. In this paper, an overview of optimization and mathematical modeling approaches in the field of composting processes is presented. The advantages and limitations of optimization and mathematical modeling for improving composting processes are also addressed.
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113
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Nisca A, Ștefănescu R, Moldovan C, Mocan A, Mare AD, Ciurea CN, Man A, Muntean DL, Tanase C. Optimization of Microwave Assisted Extraction Conditions to Improve Phenolic Content and In Vitro Antioxidant and Anti-Microbial Activity in Quercus cerris Bark Extracts. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11030240. [PMID: 35161221 PMCID: PMC8839461 DOI: 10.3390/plants11030240] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/12/2022] [Accepted: 01/12/2022] [Indexed: 05/03/2023]
Abstract
The species of the Quercus genus, including Quercus cerris L., are widely used and their wood represents a valuable material utilized for various purposes. The intense industrial processing of wood results in a considerable amount of poorly-used natural by-products, such as bark, and a loss of potentially useful raw materials. Thus, the aim of our study was to evaluate the phytochemical characteristics and potential biological activities of Quercus cerris bark extracts obtained by optimizing the parameters of microwave assisted extraction (MAE). The optimum conditions for MAE were determined using a design of experiments (DoE) model, which set the experimental variables (irradiation time and microwave power) and their values. Aqueous and hydroalcoholic extractions were performed and the optimum parameters of extraction were determined for both solvents. The total polyphenolic and tannin contents were determined. The biological activities representative of antioxidant capacity were determined using two free radical scavenging methods, the DPPH and ABTS methods, and the antibacterial activity was assessed with the microdilution method. The results showed different optimal extraction conditions for aqueous (30 min at 850 W) and hydroalcoholic (18 min at 650 W) extracts. A higher yield of total polyphenols was observed in the hydroalcoholic bark extract (403.73 ± 7.35 mg gallic acid equivalents/g dried weight); however a lower level of tannins was registered in comparison to the aqueous extract. In addition, both extracts exerted high antioxidant activities, with the aqueous extracts having a stronger inhibitory effect against the DPPH radical. Moreover, the extracts exhibited antibacterial activity against the tested bacterial strains, especially against the Gram-positive strains and Klebsiella pneumoniae, with the hydroalcoholic extracts being more efficient overall. To conclude, the optimized MAE was an efficient method to extract phytochemical compounds with potential biological effects from Quercus cerris bark.
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Affiliation(s)
- Adrian Nisca
- Doctoral School of Medicine and Pharmacy, “George Emil Palade” University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureș, 38 Gheorghe Marinescu Street, 540139 Târgu Mureș, Romania;
| | - Ruxandra Ștefănescu
- Department of Pharmacognosy and Phytotherapy, Faculty of Pharmacy, “George Emil Palade” University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureș, 38 Gheorghe Marinescu Street, 540139 Târgu Mureș, Romania
- Correspondence:
| | - Cadmiel Moldovan
- Department of Pharmaceutical Botany, Faculty of Pharmacy, “Iuliu Hațieganu” University of Medicine and Pharmacy, 8 Victor Babeș Street, 400012 Cluj-Napoca, Romania; (C.M.); (A.M.)
| | - Andrei Mocan
- Department of Pharmaceutical Botany, Faculty of Pharmacy, “Iuliu Hațieganu” University of Medicine and Pharmacy, 8 Victor Babeș Street, 400012 Cluj-Napoca, Romania; (C.M.); (A.M.)
- Laboratory of Chromatography, Institute of Advanced Horticulture Research of Transylvania, University of Agricultural Sciences and Veterinary Medicine, 400372 Cluj-Napoca, Romania
| | - Anca Delia Mare
- Department of Microbiology, Faculty of Medicine, “George Emil Palade” University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureș, 38 Gheorghe Marinescu Street, 540139 Târgu Mureș, Romania; (A.D.M.); (C.N.C.); (A.M.)
| | - Cristina Nicoleta Ciurea
- Department of Microbiology, Faculty of Medicine, “George Emil Palade” University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureș, 38 Gheorghe Marinescu Street, 540139 Târgu Mureș, Romania; (A.D.M.); (C.N.C.); (A.M.)
| | - Adrian Man
- Department of Microbiology, Faculty of Medicine, “George Emil Palade” University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureș, 38 Gheorghe Marinescu Street, 540139 Târgu Mureș, Romania; (A.D.M.); (C.N.C.); (A.M.)
| | - Daniela-Lucia Muntean
- Department of Analytical Chemistry and Drug Analysis, Faculty of Pharmacy, University of Medicine, Pharmacy, Sciences and Technology of Târgu-Mureș, Gh. Marinescu Street No. 38, 540139 Târgu Mureș, Romania;
| | - Corneliu Tanase
- Department of Pharmaceutical Botany, Faculty of Pharmacy, “George Emil Palade” University of Medicine, Pharmacy, Sciences and Technology of Târgu Mures, 38 Gheorghe Marinescu Street, 540139 Târgu Mures, Romania;
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114
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Munshi S, Sinha A, Yiga S, Banerjee S, Singh R, Hossain MK, Haukka M, Valiati AF, Huelsmann RD, Martendal E, Peralta R, Xavier F, Wendt OF, Paine TK, Nordlander E. Hydrogen-atom and oxygen-atom transfer reactivities of iron(IV)-oxo complexes of quinoline-substituted pentadentate ligands. Dalton Trans 2022; 51:870-884. [PMID: 34994361 DOI: 10.1039/d1dt03381f] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A series of iron(II) complexes with the general formula [FeII(L2-Qn)(L)]n+ (n = 1, L = F-, Cl-; n = 2, L = NCMe, H2O) have been isolated and characterized. The X-ray crystallographic data reveals that metal-ligand bond distances vary with varying ligand field strengths of the sixth ligand. While the complexes with fluoride, chloride and water as axial ligand are high spin, the acetonitrile-coordinated complex is in a mixed spin state. The steric bulk of the quinoline moieties forces the axial ligands to deviate from the Fe-Naxial axis. A higher deviation/tilt is noted for the high spin complexes, while the acetonitrile coordinated complex displays least deviation. This deviation from linearity is slightly less in the analogous low-spin iron(II) complex [FeII(L1-Qn)(NCMe)]2+ of the related asymmetric ligand L1-Qn due to the presence of only one sterically demanding quinoline moiety. The two iron(II)-acetonitrile complexes [FeII(L2-Qn)(NCMe)]2+ and [FeII(L1-Qn)(NCMe)]2+ generate the corresponding iron(IV)-oxo species with higher thermal stability of the species supported by the L1-Qn ligand. The crystallographic and spectroscopic data for [FeIV(O)(L1-Qn)](ClO4)2 bear resemblance to other crystallographically characterized S = 1 iron(IV)-oxo complexes. The hydrogen atom transfer (HAT) and oxygen atom transfer (OAT) reactivities of both the iron(IV)-oxo complexes were investigated, and a Box-Behnken multivariate optimization of the parameters for catalytic oxidation of cyclohexane by [FeII(L2-Qn)(NCMe)]2+ using hydrogen peroxide as the terminal oxidant is presented. An increase in the average Fe-N bond length in [FeII(L1-Qn)(NCMe)]2+ is also manifested in higher HAT and OAT rates relative to the other reported complexes of ligands based on the N4Py framework. The results reported here confirm that the steric influence of the ligand environment is of critical importance for the reactivity of iron(IV)-oxo complexes, but additional electronic factors must influence the reactivity of iron-oxo complexes of N4Py derivatives.
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Affiliation(s)
- Sandip Munshi
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Kolkata, India.
| | - Arup Sinha
- Chemical Physics, Department of Chemistry, Lund University, Box 124, SE-221 00 Lund, Sweden. .,Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Vellore, India
| | - Solomon Yiga
- Center for Analysis and Synthesis, Department of Chemistry, Lund University, Box 124, SE-221 00 Lund, Sweden. .,Department of Chemistry, Makerere University, P. O. Box 7062, Kampala, Uganda
| | - Sridhar Banerjee
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Kolkata, India.
| | - Reena Singh
- Chemical Physics, Department of Chemistry, Lund University, Box 124, SE-221 00 Lund, Sweden.
| | - Md Kamal Hossain
- Chemical Physics, Department of Chemistry, Lund University, Box 124, SE-221 00 Lund, Sweden.
| | - Matti Haukka
- Department of Chemistry, University of Jyväskylä, Box 35, FI-400 14, Jyväskylä, Finland
| | - Andrei Felipe Valiati
- Department of Chemistry, LABINC, Universidade Federal de Santa Catarina (UFSC), 88040-900 Florianopolis, Santa Catarina, Brazil
| | - Ricardo Dagnoni Huelsmann
- Department of Chemistry, Center for Technological Sciences, Universidade do Estado de Santa Catarina (UDESC), 89219-710 Joinville, Santa Catarina, Brazil
| | - Edmar Martendal
- Department of Chemistry, Center for Technological Sciences, Universidade do Estado de Santa Catarina (UDESC), 89219-710 Joinville, Santa Catarina, Brazil
| | - Rosely Peralta
- Department of Chemistry, LABINC, Universidade Federal de Santa Catarina (UFSC), 88040-900 Florianopolis, Santa Catarina, Brazil
| | - Fernando Xavier
- Department of Chemistry, Center for Technological Sciences, Universidade do Estado de Santa Catarina (UDESC), 89219-710 Joinville, Santa Catarina, Brazil
| | - Ola F Wendt
- Center for Analysis and Synthesis, Department of Chemistry, Lund University, Box 124, SE-221 00 Lund, Sweden.
| | - Tapan K Paine
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Kolkata, India.
| | - Ebbe Nordlander
- Chemical Physics, Department of Chemistry, Lund University, Box 124, SE-221 00 Lund, Sweden.
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115
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Guerini M, Condrò G, Perugini P. Evaluation of the Mucoadhesive Properties of Chitosan-Based Microstructured Lipid Carrier (CH-MLC). Pharmaceutics 2022; 14:pharmaceutics14010170. [PMID: 35057065 PMCID: PMC8781266 DOI: 10.3390/pharmaceutics14010170] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/07/2022] [Accepted: 01/10/2022] [Indexed: 02/05/2023] Open
Abstract
Different mucoadhesive systems have been studied in recent years to increase the residence time of the delivery systems and to prolong the release of the drug. The aim of this work was to evaluate the mucoadhesive properties of chitosan-based Microstructured Lipid Carrier (CH-MLC) with a new approach which requires chitosan and mucin to be compacted into a tablet and mucoadhesion to be assessed on a non-mucoadhesive substrate. This type of test showed that chitosan maintains a close bond with mucin even in the presence of a fluid and even encapsulated in microparticles. After this, using a bioreactor, the release of N-acetylcysteine (NAC) from the microparticles (NA-CH-MLC) through a layer of mucus mimicking the pathological conditions of a patient with cystic fibrosis was tested. The release of the active from NAC-CH-MLC demonstrated how the chitosan inside the microparticles acts as a penetration enhancer and how the microparticles can impart a prolonged release over time.
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Affiliation(s)
- Marta Guerini
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (G.C.); (P.P.)
- Correspondence:
| | - Giorgia Condrò
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (G.C.); (P.P.)
| | - Paola Perugini
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (G.C.); (P.P.)
- Etichub, Academic Spin-Off, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy
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da Mata Cerqueira UMF, Valasques GS, de Souza CT, Araújo SA, Bezerra MA, Novaes CG. Extraction Induced by Emulsion Breaking for Ca, Fe, Mg, and Zn Determination in Edible Oils Using High-Resolution Continuous Source Flame Atomic Absorption Spectrometry. FOOD ANAL METHOD 2022. [DOI: 10.1007/s12161-021-02216-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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117
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FARIAS AS, SANTOS HM, SILVA JUNIOR ALSD, SILVA VHCD, MENDONÇA RBES, COUTINHO JP, LÔBO IP, JESUS RMD. Multivariate approaches applied to optimization of an ultrasound-assisted extraction procedure for determination of essential elements in guarana samples by ICP OES. FOOD SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1590/fst.01321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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118
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BURBANO-IPIALES L, VILLOTA-AREVALO D, MUÑOZ-PAREDES J, OSORIO-MORA O, VALLEJO-CASTILLO V. Optimization of antioxidant compounds extraction from feijoa (Acca sellowiana berg) residues. FOOD SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1590/fst.65421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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119
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Liu SH, Lin HH. Enhancement of isopropanol removal with concomitant power generation by microbial fuel cells: Optimization of deoxidizing composite anodes using response surface methodology. CHEMOSPHERE 2022; 286:131732. [PMID: 34364227 DOI: 10.1016/j.chemosphere.2021.131732] [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: 06/08/2021] [Revised: 07/12/2021] [Accepted: 07/28/2021] [Indexed: 06/13/2023]
Abstract
This study used a response surface method to develop a deoxidizing anode, which was introduced into microbial fuel cells (MFCs) to treat isopropanol (IPA) wastewater and waste gas. By embedding a deoxidizing agent (DA) into the anode of MFCs, a hypoxic environment can be created to enable anaerobic electrogens to be effectively attached to the anode surface and grow. Consequently, MFC power generation performance can be enhanced. The optimal coke and conductive carbon black ratio of an anode and percentage of DA added were 3.61 g/g and 3.15 %, respectively. The research design concurrently achieved the maximum deoxygenation efficiency (0.86 mg O2/bead), minimum disintegration ratio (3.51 %), and minimum resistance (30.2 Ω). The regression model had high prediction power (R2 > 0.93) for anode performance. As determined through multi-objective optimization, the results highly satisfied the target expectation (desirability = 0.82). The optimized deoxidizing anode was filled into an air-cathode MFC, which had a higher IPA removal efficiency (1.15-fold) and voltage output (1.24-fold) than an MFC filled with coke. The results for the trickling-bed MFC filled with a deoxidizing anode revealed that when the inlet concentration was 0.74 g/m3, the voltage output and power density were highest at 416.3 mV and 486.6 mW/m3, respectively. The deoxidizing anode developed has the potential to increase the MFC voltage output and the pollutant removal.
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Affiliation(s)
- Shu-Hui Liu
- Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, Yunlin, 64002, Taiwan, ROC.
| | - Hsin-Hui Lin
- Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, Yunlin, 64002, Taiwan, ROC
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BADAOUI FZ, BOUZID D. Formulation and Optimization of Diclofenac Sodium Loaded Ethylcellulose Nanoparticles. BRAZ J PHARM SCI 2022. [DOI: 10.1590/s2175-97902022e19586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Fatima Zohra BADAOUI
- Salah Boubnider University, Algeria; Process Engineering Laboratory for Sustainable Development and Health Products, Algeria
| | - Djallel BOUZID
- National Polytechnic School of Constantine, Algeria; Process Engineering Laboratory for Sustainable Development and Health Products, Algeria
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Silva MSD, Calixto GKS, Oliveira DCD, Lourenço FR, Calixto LA. Desirability Function in analytical method development for determination of glitazones and metabolites employing HF-LPME. BRAZ J PHARM SCI 2022. [DOI: 10.1590/s2175-97902022e19049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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122
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Fouad MA, Elsabour SA, Elkady EF, Elshazly HM. Design of experiment (DOE), multiple response optimization and utilizing the desirability function in the simultaneous HPLC separation of five antihypertensive drugs. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2022. [DOI: 10.1007/s13738-021-02316-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Saifullah M, Akanbi TO, McCullum R, Vuong QV. Optimization of Commercial Microwave Assisted-Extraction Conditions for Recovery of Phenolics from Lemon-Scented Tee Tree ( Leptospermum petersonii) and Comparison with Other Extraction Techniques. Foods 2021; 11:foods11010050. [PMID: 35010175 PMCID: PMC8750632 DOI: 10.3390/foods11010050] [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: 11/30/2021] [Revised: 12/15/2021] [Accepted: 12/21/2021] [Indexed: 01/25/2023] Open
Abstract
The lemon-scented tea tree (LSTT) is an Australian native herb and is a rich source of essential oil and phenolics. The ETHOS X extraction system is known as a commercial microwave-assisted extraction (MAE) system for extracting bioactive compounds from plant materials. This study investigated the influence of soaking time, radiation time, microwave power, and sample to solvent ratio on the extraction efficiency of polyphenols and antioxidant properties from lemon-scented tea tree leaves and optimized the extraction conditions using response surface methodology (RSM). The effectiveness of ETHOS X was further compared with ultrasound-assisted extraction (UAE) and shaking water bath (SWB) techniques. The results revealed that soaking time did not significantly affect the recovery of phenolics from the leaves (p > 0.05). Thus, soaking is not required for the ETHOS X extraction of polyphenols from LSTT leaves. RSM was successfully applied to explore the impact of ETHOS X extraction conditions and optimize the extraction conditions. Radiation time significantly affects the recovery yield of phenolics (p < 0.05) positively, whereas irradiation power and sample to solvent ratio adversely influenced the extraction yields of phenolics. The optimal ETHOS X extraction conditions were: radiation time of 60 min, irradiation power of 600 W, and sample to solvent ratio of 2 g/100 mL. Under these conditions, 119.21 ± 7.09 mg of phenolic, 85.31 ± 4.55 mg of flavonoids, and 137.51 ± 12.52 mg of proanthocyanidins can be extracted from a gram of dried LSTT leaves. In comparison with UAE and SWB, ETHOS X is not more effective for the extraction of phenolics than UAE and SWB. However, this technique can save half of the solvent volume compared to UAE and SWB techniques.
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Affiliation(s)
- Md Saifullah
- School of Environmental and Life Sciences, College of Engineering, Science and Environment, The University of Newcastle, Ourimbah, NSW 2258, Australia; (M.S.); (T.O.A.); (R.M.)
- Department of Agro Product Processing Technology, Faculty of Applied Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Taiwo Olusesan Akanbi
- School of Environmental and Life Sciences, College of Engineering, Science and Environment, The University of Newcastle, Ourimbah, NSW 2258, Australia; (M.S.); (T.O.A.); (R.M.)
| | - Rebecca McCullum
- School of Environmental and Life Sciences, College of Engineering, Science and Environment, The University of Newcastle, Ourimbah, NSW 2258, Australia; (M.S.); (T.O.A.); (R.M.)
| | - Quan Van Vuong
- School of Environmental and Life Sciences, College of Engineering, Science and Environment, The University of Newcastle, Ourimbah, NSW 2258, Australia; (M.S.); (T.O.A.); (R.M.)
- Correspondence:
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Karaer Ö, Dinç-Zor Ş, Aşçı B. Development of a Validated Stability-Indicating HPLC Method for Vinpocetine in the Presence of Potential İmpurities in Tablet Dosage Form by Multi-Response Optimization. J AOAC Int 2021; 105:688-695. [PMID: 34918107 DOI: 10.1093/jaoacint/qsab167] [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: 08/12/2021] [Revised: 11/09/2021] [Accepted: 11/29/2021] [Indexed: 11/13/2022]
Abstract
BACKGROUND Vinpocetine has been prescribed for the treatment of ischemic brain diseases for many years. The drug, which has side effects such as headache, flushing, and decreased blood pressure, is not found in nature, but it can be synthesized by several approaches. OBJECTIVES A simple, rapid, selective, stability-indicating high performance liquid chromatographic method was developed for the simultaneous estimation of vinpocetine and their potential impurities in a tablet formulation. METHODS Optimum HPLC conditions were tried to be determined by statistical experimental design method. The proposed method was validated as per the ICH guidelines. Stress study was used to demonstrate the stability-indicating ability of the developed method in the quantification of vinpocetine and potential impurities within the same run. RESULTS According to multi-response optimization using the Derringer's desirability function, the mobile phase consisted of acetonitrile: Phosphate Buffer (pH 6.0) in the ratio of 65:35 ʋ/ʋ at a flow rate of 1.7 mL/min. Significant degradations were observed for the drug product under acid hydrolysis and alkali hydrolysis. The new method showed reasonable detection and quantification limits with good selectivity, precision, linearity and recovery. CONCLUSIONS These validation results have shown that this method is suitable for quantitative determination of vinpocetine and its impurities in quality control laboratories. HIGHLIGHTS A reliable and rapid HPLC method which was optimized with response surface methodology and multi-response optimization based on Derringer's desirability function was developed for the simultaneous analysis of vinpocetine and its impurities in a tablet formulation.
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Affiliation(s)
- Özlem Karaer
- Department of Chemistry, Yildiz Technical University, Davutpasa Campus, Istanbul, 34220 Turkey
| | - Şule Dinç-Zor
- Department of Chemistry, Yildiz Technical University, Davutpasa Campus, Istanbul, 34220 Turkey
| | - Bürge Aşçı
- Department of Chemistry, Yildiz Technical University, Davutpasa Campus, Istanbul, 34220 Turkey
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125
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Xu T, Wang S, Li Y, Li J, Cai J, Zhang Y, Xu D, Zhang J. Review of the destruction of organic radioactive wastes by supercritical water oxidation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 799:149396. [PMID: 34426331 DOI: 10.1016/j.scitotenv.2021.149396] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 07/28/2021] [Accepted: 07/28/2021] [Indexed: 06/13/2023]
Abstract
Organic materials, such as ion exchange resins, plastic, oils, and solvents, are widely used in the operation and decommission of nuclear facilities. The generated radioactive organic wastes are both radioactive and organic; therefore, the degradation of such wastes becomes more difficult. Due to delays in the disposal of radioactive organic wastes, potential safety risks are increasing. With the advantages of degrading refractory organics rapidly and thoroughly, supercritical water oxidation (SCWO) has become a potential alternative way to degrade radioactive organic wastes. This review focused on the degradation characteristics of different radioactive wastes from the perspective of potential practical applications. Some improved methods for facilitating the degradation of radioactive wastes by SCWO are considered and analyzed. Moreover, the kinetics and intermediate pathways of radioactive organic wastes are further analyzed. The distribution, migration and transformation of radionuclides during the SCWO reaction, as well as the further processing of radionuclides in gas-, liquid- and solid-phase products, were summarized and discussed. Furthermore, some fruitful areas for further work were reviewed for the highly efficient degradation of radioactive organic wastes. This review can provide useful information and guidance for the industrial applications of SCWO treatment for radioactive wastes.
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Affiliation(s)
- Tiantian Xu
- Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Shuzhong Wang
- Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
| | - Yanhui Li
- Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
| | - Jianna Li
- Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Jianjun Cai
- School of Architecture and Traffic, Guilin University of Electronic Technology, Guilin 541004, China.
| | - Yishu Zhang
- Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Donghai Xu
- Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Jie Zhang
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an, Shaanxi 710048, China
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Makwakwa T, Mafa P, Nyoni H, Msagati T. Optimization of square wave voltammetry (SWV) parameters by design of experiment (DoE) methodologies for the determination of mifepristone at glassy carbon electrode (GCE). ELECTROANAL 2021. [DOI: 10.1002/elan.202100383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tlou Makwakwa
- University of South Africa College of Science Engineering and Technology SOUTH AFRICA
| | | | | | - Titus Msagati
- University of South Africa - Science Campus SOUTH AFRICA
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127
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Jampana RT, Avula PR, Anumolu PD. Multivariate optimization and evaluation of quaternary mixture in bulk and co-formulated dosage forms by central composite design. FUTURE JOURNAL OF PHARMACEUTICAL SCIENCES 2021. [DOI: 10.1186/s43094-021-00266-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
The current study describes the use of central composite design for multivariate optimization of resolution and retention time, taking into account different critical method parameters like organic phase, pH, flow rate, and wavelength for risk assessment. The chromatographic method for the assay of the most effective anti-viral regimen (EPCLUSA, DARVONI, and HARVONI) was developed. An experimental design was presented by sequential investigation of four independent parameters. The method was developed using XTERRA C18 (250 mm × 4.6 mm, 5 μm particle size) column in isocratic mode using potassium dihydrogen phosphate buffer (pH adjusted to 5) and acetonitrile (50:50 % v/v) as mobile phase at a flow rate of 1.0 ml/min and UV detection wavelength of 260 nm.
Results
The separation of four drugs with fine resolution and preferable retention times was achieved. Retention times of four drugs were found to be 2.96, 3.91, 7.15, and 11.94 min for daclatasvir, sofosbuvir, velpatasvir, and ledipasvir, respectively. The percentage accuracy of labelled claim was in the range of 99–102%, and the pooled %RSD for repeatability, precision, and accuracy was less than 2%.
Conclusion
The suggested method was applied for quantification and identification of studied drugs in tablets; the results agreed with the label claim and were validated according to the ICH guidelines. The optimized method can be used for pharmacokinetic and quality control studies.
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128
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da Silva KM, Iturrospe E, Heyrman J, Koelmel JP, Cuykx M, Vanhaecke T, Covaci A, van Nuijs ALN. Optimization of a liquid chromatography-ion mobility-high resolution mass spectrometry platform for untargeted lipidomics and application to HepaRG cell extracts. Talanta 2021; 235:122808. [PMID: 34517665 DOI: 10.1016/j.talanta.2021.122808] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/11/2021] [Accepted: 08/13/2021] [Indexed: 12/26/2022]
Abstract
Analytical methods to evaluate the lipidome of biological samples need to provide high data quality to ensure comprehensive profiling and reliable structural elucidation. In this perspective, liquid chromatography-high resolution mass spectrometry (LC-HRMS) is the state-of-the-art technique for lipidomic analysis of biological samples. There are thousands of lipids in most biological samples, and therefore separation methods before introduction to the mass spectrometer is key for relative quantitation and identification. Chromatographic methods differ across laboratories, without any consensus on the best methodologies. Therefore, we designed an experiment to determine the optimal LC methodology, and assessed the value of ion mobility for an additional dimension of separation. To apply an untargeted method for hypothesis generation focused on lipidomics, LC-HRMS parameters were optimized based on the measurement of 50 panel lipids covering key human metabolic pathways. Reversed-phase liquid chromatography columns were compared based on a quality scoring system considering the signal-to-noise ratio, peak shape, and retention factor. Furthermore, drift tube ion mobility spectrometry (DTIMS) was implemented to increase peak capacity and confidence during annotation by providing collision cross section (CCS) values for the analytes under investigation. However, hyphenating DTIMS to LC-HRMS may result in a reduced sensitivity due to impaired duty cycles. To increase the signal intensity, a Box-Behnken design (BBD) was used to optimize four key factors, i.e. drift entrance voltage, drift exit voltage, rear funnel entrance, and rear funnel exit voltages. Application of a maximized desirability function provided voltages for the above-mentioned parameters resulting in higher signal intensity compared to each combination of parameters used during the BBD. In addition, the influence of single pulse and Hadamard 4-bit multiplexed modes on signal intensity was explored and different trap filling and release times of ions were evaluated. The optimized LC-DTIM-HRMS platform was applied to extracts from HepaRG cells and resulted in 3912 high-quality features (<30% median relative standard deviation; n = 6, t = 24 h). From these features, 436 lipid species could be annotated (i.e., matching based on accurate mass <5 ppm, isotopic pattern, in-silico MS/MS fragmentation, and in-silico CCS database matching <3%). The application of LC-DTIM-HRMS for untargeted analysis workflows is growing and the platform optimization, as described here, can be used to guide the method development and CCS database comparison for high confidence lipid annotation.
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Affiliation(s)
| | - Elias Iturrospe
- University of Antwerp, Toxicological Centre, Universiteitsplein 1, 2610, Antwerp, Belgium; Vrije Universiteit Brussel, Department of In Vitro Toxicology and Dermato-cosmetology, Laarbeeklaan 103, 1090, Jette, Belgium
| | - Joris Heyrman
- University of Antwerp, Toxicological Centre, Universiteitsplein 1, 2610, Antwerp, Belgium
| | - Jeremy P Koelmel
- Yale University, School of Public Health, New Haven, CT, 06520, United States
| | - Matthias Cuykx
- Antwerp University Hospital, Laboratory of Clinical Medicine, Drie Eikenstraat 655, 2650, Edegem, Belgium
| | - Tamara Vanhaecke
- Vrije Universiteit Brussel, Department of In Vitro Toxicology and Dermato-cosmetology, Laarbeeklaan 103, 1090, Jette, Belgium
| | - Adrian Covaci
- University of Antwerp, Toxicological Centre, Universiteitsplein 1, 2610, Antwerp, Belgium
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Gomes RDS, Thesing A, Santos JFL, Fernandes AN. Self-supported 3D reduced graphene oxide for solid-phase extraction: An efficient and low-cost sorbent for environmental contaminants in aqueous solution. Talanta 2021; 235:122750. [PMID: 34517618 DOI: 10.1016/j.talanta.2021.122750] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/27/2021] [Accepted: 07/28/2021] [Indexed: 10/20/2022]
Abstract
A 3D reduced graphene oxide (3D-rGO), a self-supported, efficient, and low-cost sorbent, was synthesised and employed in a solid-phase extraction (SPE) cartridge. As a proof of concept, it was applied to remove diclofenac from aqueous solution. After applying statistical methods to systematically investigate key parameters for optimizing the 3D-rGO cartridge performance, it reached removal and elution efficiencies of 100 % and 90 %, respectively. This SPE cartridge presented advantages compared to traditional ones as the smaller amount of material into the cartridge (mass twenty times smaller), in addition to the ability of eliminating sorbent preconditioning, reducing the use of solvents, and making the process environmentally friendly with a faster operation. Also, it presented improved reproducibility after several cycles of reuse, and finally a lower cost of production unveiled by a cost-benefit analysis. Analysis with scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectrometry, Raman, and Fourier transform infrared spectroscopy in attenuated total reflectance mode suggested that the 3D framework morphology with a high content of carbon at the surface and some residual oxygen-containing groups are the protagonists in this performance. Therefore, 3D-rGO has the potential to be a highly efficient sorbent in analytical procedures using SPE for environmental contaminants in water and effluent samples.
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Affiliation(s)
- Raimara de Souza Gomes
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Bairro Agronomia, Porto Alegre, RS, 91501-970, Brazil
| | - Anderson Thesing
- Instituto de Física, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Bairro Agronomia, Porto Alegre, RS, 91501-970, Brazil
| | - Jacqueline Ferreira Leite Santos
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Bairro Agronomia, Porto Alegre, RS, 91501-970, Brazil.
| | - Andreia Neves Fernandes
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Bairro Agronomia, Porto Alegre, RS, 91501-970, Brazil.
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Multiple response optimization of ultrasound-assisted procedure for multi-element determination in Brazilian wine samples by microwave-induced plasma optical emission spectrometry. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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131
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Halim NAA, Abidin ZZ, Siajam SI, Hean CG, Harun MR. Optimization studies and compositional analysis of subcritical water extraction of essential oil from Citrus hystrix DC. leaves. J Supercrit Fluids 2021. [DOI: 10.1016/j.supflu.2021.105384] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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132
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Brignone SG, Ravetti S, Maletto BA, Palma SD. Optimization of Microparticle Coating Parameters with Cell Wall of Saccharomyces cerevisiae by Fractional Factorial Design. J Pharm Innov 2021. [DOI: 10.1007/s12247-020-09473-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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133
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Development of a Chiral Capillary Electrophoresis Method for the Enantioseparation of Verapamil Using Cyclodextrins as Chiral Selectors and Experimental Design Optimization. Symmetry (Basel) 2021. [DOI: 10.3390/sym13112186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Chirality is a property of asymmetry which determines the pharmacokinetic and pharmacological profiles of optically active pharmaceuticals. Verapamil (VER), a calcium channel blocker phenylalkylamine derivative used in the treatment of cardio-vascular diseases, is a chiral compound, marketed as a racemate, although differences between the pharmacokinetic and pharmacological attributes of the enantiomers have been reported. The aim of our study was to develop a new chiral separation method for VER enantiomers by capillary electrophoresis (CE) using cyclodextrins (CDs) as chiral selectors (CSs). After an initial screening, using different native and derivatized CDs, at four pH levels, heptakis 2,3,6-tri-O-methyl-β-CD (TM-β-CD), a neutral derivatized CD, was identified as the optimum CS. For method optimization, a preliminary univariate approach was applied to characterize the influence of analytical parameters on the separation followed by a Box–Behnken experimental design to establish the optimal separation conditions. Chiral separation of enantiomers was achieved with a resolution of 1.58 in approximately 4 min; the migration order was R-VER followed by S-VER. The method analytical performance was evaluated in terms of precision, linearity, accuracy, and robustness (applying a Plackett–Burnam experimental design). The developed method was applied for the determination of VER enantiomers in pharmaceuticals. Finally, a computer modelling of VER–CD complexes was used to describe host–guest chiral recognition.
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Validated Modernized Assay for Foscarnet in Pharmaceutical Formulations Using Suppressed Ion Chromatography Developed through a Quality by Design Approach. SEPARATIONS 2021. [DOI: 10.3390/separations8110209] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Inspired by the United States Pharmacopoeia (USP) “monograph modernization” initiative, we developed and validated an assay for foscarnet sodium injection solution (“foscavir”), following quality by design (QbD) principles, incorporating design of experiments (DoE) and multivariate data analysis to establish the design space and robust setpoint of the method. The resulting analytical procedure was based on ion chromatography (IC) with suppressed conductivity detection, employing an isocratic carbonate–bicarbonate eluent system. The assay was successfully validated at the robust setpoint conditions, according to the guidelines established by the International Council for Harmonization (ICH). The linear range stretched at least from 5 to 100 mg/L with high repeatability (relative standard deviation, RSD ≤ 0.3%) both at the target concentration (60 mg/L) and at 50% and 150% from this level. Special attention was given to establish a rugged assay that would be easily transferable between laboratories, and the recorded recoveries of 98.2–100.5% for both the formulated drug product and the drug substance during intermediate precision evaluation at different analysis situations indicated that this mission was accomplished. A multivariate assessment of intermediate precision data acquired using an experimental design scheme revealed that the assay was not adversely affected by any of the situation variables, including the use of different liquid chromatography instrument types, regardless of if they were constructed from inert materials or stainless steel that had been passivated, even though such problems have been reported in several previous methods for analysis of foscarnet.
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Arcoleo A, Bianchi F, Careri M. A sensitive microextraction by packed sorbent-gas chromatography-mass spectrometry method for the assessment of polycyclic aromatic hydrocarbons contamination in Antarctic surface snow. CHEMOSPHERE 2021; 282:131082. [PMID: 34470154 DOI: 10.1016/j.chemosphere.2021.131082] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 05/28/2021] [Accepted: 05/31/2021] [Indexed: 06/13/2023]
Abstract
For the first time an eco-friendly method involving microextraction by packed sorbent (MEPS) coupled to gas chromatography-mass spectrometry (GC-MS) was developed for the determination of the 16 US-EPA priority pollutant polycyclic aromatic hydrocarbons (PAHs) as indicators of anthropogenic contamination in snow samples collected in polar regions. MEPS was carried out by using C8 sorbent material packed in a barrel insert and needle (BIN) and integrated in the eVol® semi-automatic device. For optimization purposes a Face Centred Design and the multicriteria method of the desirability functions were performed to investigate the effect of some parameters affecting the MEPS extraction efficiency, i.e. the number of loading cycles and the number of elution cycles. The developed MEPS-GC-MS method proved to be suitable for PAHs analysis at ultra-trace level by extracting small sample volumes achieving detection limits for 16 PAHs in the 0.3-5 ng L-1 range, repeatability and intermediate precision below 11% and 15%, respectively, and good recovery rates in the 77.6 (±0.1)-120.8 (±0.1)% range for spiked blank snow samples. Enrichment factors in the 64 (±7)-129 (±18) range were calculated. Finally, the proposed method was successfully applied to the determination of PAHs in surface snow samples collected in 2020-2021 from four locations of Northern Victoria Land, Antarctica. Local emission sources such as ships and research stations were found to influence PAHs concentrations in the surface snow.
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Affiliation(s)
- Angela Arcoleo
- University of Parma, Department of Chemistry, Life Sciences and Environmental Sustainability, Parco Area Delle Scienze 17/A, 43124 Parma, Italy
| | - Federica Bianchi
- University of Parma, Department of Chemistry, Life Sciences and Environmental Sustainability, Parco Area Delle Scienze 17/A, 43124 Parma, Italy
| | - Maria Careri
- University of Parma, Department of Chemistry, Life Sciences and Environmental Sustainability, Parco Area Delle Scienze 17/A, 43124 Parma, Italy.
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136
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Caro Y, Van Strate P, Sartorio M, Cámara M, De Zan M. Application of the lifecycle approach to the development and validation of a chromatographic method for therapeutic drug monitoring of ceftazidime, meropenem, and piperacillin. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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137
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Drying Characteristics and Quality Attributes Affected by a Fluidized-Bed Drying Assisted with Swirling Compressed-Air for Preparing Instant Red Jasmine Rice. Processes (Basel) 2021. [DOI: 10.3390/pr9101738] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
A new process for the production of instant red jasmine rice was investigated using fluidized bed drying with the aid of swirling compressed air. Drying characteristics were evaluated using the operating parameters of fluidizing air temperature (90–120 °C) and pressure of swirling compressed air (4–6 bar). Appropriate air pressure was determined based on the highest value of model parameters from the semi-empirical Page equation and effective diffusivity. Influences of supply time of swirling compressed air (2–10 min) and drying temperature of 90–120 °C were investigated and optimized based on the quality attributes using response surface methodology. Drying at 120 °C and compressed air pressure of 6 bar gave the highest rate constant and effective diffusion coefficient. Drying at 120 °C combined with injecting swirling air for 2 min was the most suitable approach, while drying at 90 °C and supplying compressed air for 10 min was the best choice to preserve antioxidant properties. Air temperature of 98.5 °C with 2 min supply of swirling compressed air suitably provided high physical and rehydration properties and retained high health benefits of antioxidant compounds. Finally, after rehydration in warm water at 70 °C for 10 min, the textural properties of the rehydrated rice sample were comparable to conventionally cooked rice.
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138
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Shoja M, Kazemi R, Mohammadi‐Roshandeh J, Farizeh T, Shadman A, Hemmati F. Hybrid mathematical modeling and multi‐objective optimization of mechanical properties of green composites based on starch and modified rice straw fillers. J Appl Polym Sci 2021. [DOI: 10.1002/app.50915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Maryam Shoja
- Fouman Faculty of Engineering, College of Engineering University of Tehran Tehran Iran
| | - Reza Kazemi
- Caspian Faculty of Engineering, College of Engineering University of Tehran Tehran Iran
| | | | - Tara Farizeh
- Caspian Faculty of Engineering, College of Engineering University of Tehran Tehran Iran
| | - Alireza Shadman
- Department of Industrial Engineering Ferdowsi University of Mashhad Mashhad Iran
| | - Farkhondeh Hemmati
- Caspian Faculty of Engineering, College of Engineering University of Tehran Tehran Iran
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139
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Santos AM, Wong A, Ferreira LM, Soares FL, Fatibello-Filho O, Moraes FC, Vicentini FC. Multivariate optimization of a novel electrode film architecture containing gold nanoparticle-decorated activated charcoal for voltammetric determination of levodopa levels in pre-therapeutic phase of Parkinson`s disease. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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140
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Sosa-Martínez J, Balagurusamy N, Benavente-Valdés JR, Montañez J, Morales-Oyervides L. Process performance improvement for the simultaneous production of ligninolytic enzymes in solid culture using agricultural wastes through the Taguchi method. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 293:112966. [PMID: 34098354 DOI: 10.1016/j.jenvman.2021.112966] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 05/19/2021] [Accepted: 05/29/2021] [Indexed: 06/12/2023]
Abstract
Despite a large amount of published research on the production of ligninolytic enzymes, the latter are not yet being applied to combat environmental pollution. No cost-effective process has been developed to date. This study describes an improvement of the solid-state fermentation procedure for the production of ligninolytic enzymes via Phanerochaete chrysosporium ATX by applying the Taguchi method and using an agro-industrial waste as substrate. The production of lignin peroxidase (LiP), manganese peroxidase (MnP), and laccase (Lac) were simultaneously increased within a packed-bed column. The factors and levels studied were humidity (A: 60, 70, 80%), inoculum concentration (B: 7.5, 10.0, 12.5 × 105 spores/mL), packed density (C: 0.14, 0.16, 0.18 g/mL), and time (D: 6, 8, 10 days). The results showed that humidity was the factor with a higher effect upon LiP and Lac's production, while time was for MnP. Humidity exerted the greatest influence on the global desirability of the process. Improved conditions (A, 60%; B, 1.0 × 106 spores/mL; C, 0.17 g/mL; D, 8 days) were further validated: the results revealed an overall desirability increase of 237% over the unoptimized process. Process performance was likewise maintained at a higher scale (1:10). The results contribute to establishing a cost-effective bioprocess to produce ligninolytic enzymes by reducing the cost associated with raw materials and purification steps.
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Affiliation(s)
- Jazel Sosa-Martínez
- Department of Chemical Engineering, Faculty of Chemical Sciences, Autonomous University of Coahuila, Boulevard Venustiano Carranza SN, Saltillo, Coahuila, 25280, Mexico
| | - Nagamani Balagurusamy
- Bioremediation Laboratory, Faculty of Biological Sciences, Autonomous University of Coahuila, Libramiento Torreón-Matamoros, Torreón, Coahuila, 27000, Mexico
| | - Juan Roberto Benavente-Valdés
- Department of Chemical Engineering, Faculty of Chemical Sciences, Autonomous University of Coahuila, Boulevard Venustiano Carranza SN, Saltillo, Coahuila, 25280, Mexico
| | - Julio Montañez
- Department of Chemical Engineering, Faculty of Chemical Sciences, Autonomous University of Coahuila, Boulevard Venustiano Carranza SN, Saltillo, Coahuila, 25280, Mexico
| | - Lourdes Morales-Oyervides
- Department of Chemical Engineering, Faculty of Chemical Sciences, Autonomous University of Coahuila, Boulevard Venustiano Carranza SN, Saltillo, Coahuila, 25280, Mexico.
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141
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Karthick A, Chattopadhyay P. Optimum conditions of zero-valent iron nanoparticle stabilized foam application for diesel-contaminated soil remediation involving three major soil types. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:611. [PMID: 34462822 DOI: 10.1007/s10661-021-09369-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 07/30/2021] [Indexed: 06/13/2023]
Abstract
Stability of foam, enhanced by nano zero-valent iron (nZVI) and its optimized constituents, may have significant potential for effective treatment of soil contaminated with diesel oil-a major environmental problem. The optimum diesel removal efficiency from distinct types of soil accomplished by the unique application of such foams as well as the optimum conditions of the foaming constituents have not been reported in literature so far. Hence, in this work, the removal of diesel contaminant from different soil types (desert, coastal, clay soil) is optimized, and the optimized results are reported for the first time, using response surface methodology (RSM), for alkylpolyglucoside phosphate (APG-Ph) foam, stabilized by nZVI. The effect of concentrations of APG-Ph (0.02, 0.04, 0.06, 0.08, and 0.1 volume %) and nZVI (2, 3, and 3.5 mg/l) on diesel removal efficacy from soil is studied using Box-Behnken design (BBD) of response surface methodology (RSM). Maximum diesel removal efficiency obtained at a concentration of 0.1 volume % APG-Ph foam with 3.5 mg/l nZVI for desert, coastal, and clay soil is 94.6, 95.3, and 57.5%, respectively. The optimum concentrations of APG-Ph and nZVI are found to be 0.98 volume % and 0.8 mg/l, respectively. Validation of this optimal condition experimentally results in highest removal efficiency of 98.3, 97.2, and 75.9% for desert, coastal, and clay soil respectively. This is in good agreement with the predicted values by RSM (98.67, 97.57, and 76.85%). The maximum diesel removal efficiency predicted at optimal concentration of APG-Ph and nZVI is significantly larger than the results reported in literature in last three years.
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Affiliation(s)
- Arun Karthick
- Department of Chemical Engineering, Birla Institute of Technology and Science (BITS), Pilani Campus, Vidyavihar, 333031, Rajasthan, India
| | - Pradipta Chattopadhyay
- Department of Chemical Engineering, Birla Institute of Technology and Science (BITS), Pilani Campus, Vidyavihar, 333031, Rajasthan, India.
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142
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Ezzeldeen Y, Swidan S, ElMeshad A, Sebak A. Green Synthesized Honokiol Transfersomes Relieve the Immunosuppressive and Stem-Like Cell Characteristics of the Aggressive B16F10 Melanoma. Int J Nanomedicine 2021; 16:5693-5712. [PMID: 34465990 PMCID: PMC8402984 DOI: 10.2147/ijn.s314472] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 06/17/2021] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Honokiol (HK) is a natural bioactive compound with proven antineoplastic properties against melanoma. However, it shows very low bioavailability when administered orally. Alternatively, topical administration may offer a promising route. The objective of the current study was to fabricate HK transfersomes (HKTs) for topical treatment of melanoma. As an ultradeformable carrier system, transfersomes can overcome the physiological barriers to topical treatment of melanoma: the stratum corneum and the anomalous tumor microenvironment. Moreover, the immunomodulatory and stemness-regulation roles of HKTs were the main interest of this study. METHODS TFs were prepared using the modified scalable heating method. A three-factor, three-level Box-Behnken design was utilized for the optimization of the process and formulation variables. Intracellular uptake and cytotoxicity of HKTs were evaluated in nonactivated and stromal cell-activated B16F10 melanoma cells to investigate the influence of the complex tumor microenvironment on the efficacy of HK. Finally, ELISA and Western blot were performed to evaluate the expression levels of TGF-β and clusters of differentiation (CD47 and CD133, respectively). RESULTS The optimized formula exhibited a mean size of 190 nm, highly negative surface charge, high entrapment efficiency, and sustained release profile. HKTs showed potential to alleviate the immunosuppressive characteristics of B16F10 melanoma in vitro via downregulation of TGF-β signaling. In addition, HKTs reduced expression of the "do not eat me" signal - CD47. Moreover, HKTs possessed additional interesting potential to reduce the expression of the stem-like cell marker CD133. These outcomes were boosted upon combination with metformin, an antihyperglycemic drug recently reported to possess different functions in cancer, while combination with collagenase, an extracellular matrix-depleting enzyme, produced detrimental effects. CONCLUSION HKTs represent a promising scalable formulation for treatment of the aggressive B16F10 melanoma, which is jam-packed with immunosuppressive and stem-like cell markers.
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Affiliation(s)
- Yasmeen Ezzeldeen
- Department of Pharmaceutics, Faculty of Pharmacy, The British University in Egypt (BUE), El-Sherouk City, Cairo, 11837, Egypt
| | - Shady Swidan
- Department of Pharmaceutics, Faculty of Pharmacy, The British University in Egypt (BUE), El-Sherouk City, Cairo, 11837, Egypt
- The Center for Drug Research and Development (CDRD), Faculty of Pharmacy, The British University in Egypt, El-Sherouk City, Cairo, 11837, Egypt
| | - Aliaa ElMeshad
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt
- Department of Bio Nano, Faculty of Nanotechnology for Postgraduate Studies, Cairo University, El-Sheikh Zayed, Giza, 12588, Egypt
| | - Aya Sebak
- Department of Pharmaceutical Technology, Faculty of Pharmacy and Biotechnology, German University in Cairo (GUC), Cairo, Egypt
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143
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Application of Experimental Design Methodologies in the Enantioseparation of Pharmaceuticals by Capillary Electrophoresis: A Review. Molecules 2021; 26:molecules26154681. [PMID: 34361834 PMCID: PMC8348688 DOI: 10.3390/molecules26154681] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 07/28/2021] [Accepted: 07/29/2021] [Indexed: 12/12/2022] Open
Abstract
Chirality is one of the major issues in pharmaceutical research and industry. Capillary electrophoresis (CE) is an interesting alternative to the more frequently used chromatographic techniques in the enantioseparation of pharmaceuticals, and is used for the determination of enantiomeric ratio, enantiomeric purity, and in pharmacokinetic studies. Traditionally, optimization of CE methods is performed using a univariate one factor at a time (OFAT) approach; however, this strategy does not allow for the evaluation of interactions between experimental factors, which may result in ineffective method development and optimization. In the last two decades, Design of Experiments (DoE) has been frequently employed to better understand the multidimensional effects and interactions of the input factors on the output responses of analytical CE methods. DoE can be divided into two types: screening and optimization designs. Furthermore, using Quality by Design (QbD) methodology to develop CE-based enantioselective techniques is becoming increasingly popular. The review presents the current use of DoE methodologies in CE-based enantioresolution method development and provides an overview of DoE applications in the optimization and validation of CE enantioselective procedures in the last 25 years. Moreover, a critical perspective on how different DoE strategies can aid in the optimization of enantioseparation procedures is presented.
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144
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Teles ASC, Chávez DWH, Santiago MCPDA, Gottschalk LMF, Tonon RV. Composition of different media for enzyme production and its effect on the recovery of phenolic compounds from grape pomace. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.102067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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145
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Wang X, Xiang J, Pei G, Li L, Huang Q, Lv X. Application of response surface methodology for roasting optimization in composite roasting—Acid leaching vanadium extraction process. Chem Eng Res Des 2021. [DOI: 10.1016/j.cherd.2021.06.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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146
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Rahman N, Varshney P. Effective removal of doxycycline from aqueous solution using CuO nanoparticles decorated poly(2-acrylamido-2-methyl-1-propanesulfonic acid)/chitosan. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:43599-43617. [PMID: 33837937 DOI: 10.1007/s11356-021-13584-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 03/17/2021] [Indexed: 05/22/2023]
Abstract
The primary focus of the present study was to synthesize CuO nanoparticles decorated poly(2-acrylamido-2-methyl-1-propanesulfonic acid)/chitosan to explore its potential for uptake of doxycycline (DXN) from water. The composite material was characterized using Fourier transform infrared spectroscopy, scanning electron microscopy with energy dispersive X-ray spectroscopy, X-ray diffraction and thermogravimetric analysis-differential thermal analysis. Central composite design under response surface methodology was opted to optimize the process variables (pH, adsorbent dosage, contact time and initial concentration of DXN) for obtaining the highest removal efficiency. The removal of DXN reached 98.84% at 303 K under the optimum conditions of pH 7.0, equilibrating time of 70 min, adsorbent dose of 20 mg/25 mL and initial concentration of 50 mg L-1. The Langmuir isotherm and pseudo-second-order kinetic models fitted best with the experimental data. The values of ΔG° (- 29.159 to - 31.997 kJ mol-1), ΔH° (56.768 kJ mol-1) and ΔS° (283.382 J mol-1 K-1) demonstrated the spontaneous and endothermic nature of adsorption process. The adsorption/desorption study revealed the reusability of the prepared composite material for DXN uptake up to six cycles.
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Affiliation(s)
- Nafisur Rahman
- Department of Chemistry, Aligarh Muslim University, Aligarh, 202002, India.
| | - Poornima Varshney
- Department of Chemistry, Aligarh Muslim University, Aligarh, 202002, India
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147
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Dourado CS, Domingues IFF, de Oliveira Magalhães L, Casarin F, Ribeiro ML, Braga JWB, Dias ACB. Optimization of a saccharin molecularly imprinted solid-phase extraction procedure and evaluation by MIR hyperspectral imaging for analysis of diet tea by HPLC. Food Chem 2021; 367:130732. [PMID: 34384980 DOI: 10.1016/j.foodchem.2021.130732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 07/07/2021] [Accepted: 07/28/2021] [Indexed: 01/04/2023]
Abstract
Saccharin was determined based on a new molecularly imprinted solid-phase extraction (MISPE) procedure. The polymer was synthesized with a hybrid monomer of metacrylic acid and 3-amino propril tetraethoxysilane and saccharin as template. After the synthesis, the saccharin removal from the MIP was verified by the UV analysis of the solutions used in the template removal procedure, as well as by the direct MIP analysis using FTIR hyperspectral image and chemometrics. The residual saccharin concentrations observed in the image analysis revealed a narrow concentration distribution consistent with a homogenous material. The MISPE was performed with homemade cartridges containing 200 mg of the MIP. The results obtained with standards and diet tea samples confirmed high affinity, adsorption capacity and selectivity of the MIP. The MISPE cartridge exhibited recoveries of 100 ± 3% in six extraction cycles. The diet tea analysis showed a significant reduction of the interferences, which can considerable simplifies the HPLC-UV analysis.
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Affiliation(s)
- Camila Santos Dourado
- Institute of Chemistry, University of Brasilia - UnB, Brasilia, DF 70910-900, Brazil
| | | | | | - Fabiana Casarin
- Institute of Chemistry, University of Brasilia - UnB, Brasilia, DF 70910-900, Brazil
| | - Millene Lopes Ribeiro
- Institute of Chemistry, University of Brasilia - UnB, Brasilia, DF 70910-900, Brazil
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148
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Ganesan V, Shanmugam V, Kaliyamoorthy B, Sanjeevi S, Shanmugam SK, Alagumalai V, Krishnamoorthy Y, Försth M, Sas G, Javad Razavi SM, Das O. Optimisation of Mechanical Properties in Saw-Dust/Woven-Jute Fibre/Polyester Structural Composites under Liquid Nitrogen Environment Using Response Surface Methodology. Polymers (Basel) 2021; 13:polym13152471. [PMID: 34372073 PMCID: PMC8348592 DOI: 10.3390/polym13152471] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 07/22/2021] [Accepted: 07/22/2021] [Indexed: 11/16/2022] Open
Abstract
Natural fibre-based composites are replacing traditional materials in a wide range of structural applications that are used in different environments. Natural fibres suffer from thermal shocks, which affects the use of these composites in cold environment. Considering these, a goal was set in the present research to investigate the impact of cryogenic conditions on natural fibre composites. Composites were developed using polyester as matrix and jute-fibre and waste Teak saw-dust as reinforcement and filler, respectively. The effects of six parameters, viz., density of saw-dust, weight ratio of saw-dust, grade of woven-jute, number of jute layers, duration of cryogenic treatment of composite and duration of alkaline treatment of fibres on the mechanical properties of the composite was evaluated with an objective to maximise hardness, tensile, impact and flexural strengths. Taguchi method was used to design the experiments and response-surface methodology was used to model, predict and plot interactive surface plots. Results indicated that the duration of cryogenic treatment had a significant effect on mechanical properties, which was better only up to 60 min. The models were found to be statistically significant. The study concluded that saw-dust of density 300 kg/m3 used as a filler with a weight ratio of 13 wt.% and a reinforcement of a single layer of woven-jute-fibre mat of grade 250 gsm subjected to alkaline treatment for 4 h in a composite that has undergone 45 min of cryogenic treatment presented an improvement of 64% in impact strength, ca. 21% in flexural strength, ca. 158% in tensile strength and ca. 28% in hardness.
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Affiliation(s)
- Velmurugan Ganesan
- Department of Agricultural Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai 602105, India
- Correspondence: (V.G.); (S.M.J.R.); or (O.D.)
| | - Vigneshwaran Shanmugam
- Department of Mechanical Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai 602105, India; (V.S.); (V.A.)
| | - Babu Kaliyamoorthy
- Department of Mechanical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai 603110, India;
| | - Sekar Sanjeevi
- Department of Mechanical Engineering, Hindusthan Institute of Technology, Coimbatore 641028, India;
| | - Suresh Kumar Shanmugam
- Faculty of Mechanical Engineering, Kalasalingam Academy of Research and Education, Krishnankoil 626128, India;
| | - Vasudevan Alagumalai
- Department of Mechanical Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai 602105, India; (V.S.); (V.A.)
| | - Yoganandam Krishnamoorthy
- Department of Mechanical Engineering, ARM College of Engineering and Technology, Chennai 602105, India;
| | - Michael Försth
- Structural and Fire Engineering Division, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97187 Luleå, Sweden; (M.F.); (G.S.)
| | - Gabriel Sas
- Structural and Fire Engineering Division, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97187 Luleå, Sweden; (M.F.); (G.S.)
| | - Seyed Mohammad Javad Razavi
- Department of Mechanical Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway
- Correspondence: (V.G.); (S.M.J.R.); or (O.D.)
| | - Oisik Das
- Structural and Fire Engineering Division, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97187 Luleå, Sweden; (M.F.); (G.S.)
- Correspondence: (V.G.); (S.M.J.R.); or (O.D.)
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149
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Ardila JA, de Alvarenga Junior BR, Durango LC, Soares FLF, Perlatti B, de Oliveira Cardoso J, Oliveira RV, Forim MR, Carneiro RL. Design of experiments applied to stress testing of pharmaceutical products: A case study of Albendazole. Eur J Pharm Sci 2021; 165:105939. [PMID: 34284097 DOI: 10.1016/j.ejps.2021.105939] [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: 03/09/2021] [Revised: 05/28/2021] [Accepted: 06/28/2021] [Indexed: 10/20/2022]
Abstract
Forced degradation tests are studies used to assess the stability of active pharmaceutical ingredients (APIs) and their formulations. These tests are performed submitting the API under extreme conditions in order to know the main degradation products in a short period of time. The results of these studies are used to assess the degradation susceptibility of APIs and to validate chromatographic analytical methods. However, most of degradation studies are performed using one-factor-at-the-time (OFAT) which does not consider the interactions between degradation variables. This work proposes the use of Design of Experiment (DoE) approach in forced degradation of albendazole (ABZ). It was used a central composite design (CCD) to evaluate the forced degradation in a multivariate way. Experiments were performed taking into account the variables pH, temperature, oxidizing agent (H2O2) and UV radiation. It was verified the influence of the variables and their interactions on the ABZ degradation. The ABZ oxidation showed to be the main degradation route for ABZ, which is strongly influenced by the temperature. The hydrolysis was relevant at alkaline medium and high temperature. LC-IT-MSn was used to identify the degradation products. It was found three known degradation products (albendazole-2-amino, albendazole sulfoxide and albendazole sulfone) and a new derivate of albendazole molecule (albendazole sulfoxide with a chlorine). This last one was isolated and characterized by UPLC-QToF-MS and NMR analyses.
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Affiliation(s)
- Jorge Armando Ardila
- Department of Chemistry, Federal University of São Carlos, 13565-905, São Carlos, São Paulo, Brazil
| | | | - Luis Cuadrado Durango
- Department of Chemistry, Federal University of São Carlos, 13565-905, São Carlos, São Paulo, Brazil
| | | | - Bruno Perlatti
- Department of Chemistry and Biochemistry, University of California, 90095, Los Angeles, California, USA
| | | | - Regina Vincenzi Oliveira
- Department of Chemistry, Federal University of São Carlos, 13565-905, São Carlos, São Paulo, Brazil
| | - Moacir Rossi Forim
- Department of Chemistry, Federal University of São Carlos, 13565-905, São Carlos, São Paulo, Brazil
| | - Renato Lajarim Carneiro
- Department of Chemistry, Federal University of São Carlos, 13565-905, São Carlos, São Paulo, Brazil.
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150
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Bahia PVB, Nascimento MM, Hatje V, de Andrade JB, Machado ME. Microscale extraction combined with gas chromatography/mass spectrometry for the simultaneous determination of polycyclic aromatic hydrocarbons and polycyclic aromatic sulfur heterocycles in marine sediments. J Chromatogr A 2021; 1653:462414. [PMID: 34320434 DOI: 10.1016/j.chroma.2021.462414] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 06/15/2021] [Accepted: 07/06/2021] [Indexed: 10/20/2022]
Abstract
This paper describes a novel method based on an ultrasound-assisted extraction microscale device (UAE-MSD) for the rapid and simultaneous determination of polycyclic aromatic hydrocarbons (PAH) and polycyclic aromatic sulfur heterocycles (PASH) in marine sediments. Solvent extraction conditions were optimized by applying a simplex-centroid mixture design. Optimum conditions were used to validate and determine the concentrations of 17 PAH and 7 PASH. The best conditions were obtained by extracting sediments with 500 µL of DCM:MeOH (65:35, v:v) over 23 min of sonication. Analytes were determined by gas chromatography/mass spectrometry in selective ion monitoring (GC-MS/SIM). Matrix effects were evaluated, and matrix-matched calibration was used for quantitation. Analytical method validation was carried out using the certified reference material NIST SRM 1941b, as well as sediment spiked with PASH at three concentration levels. Recoveries ranged between 70.0 ± 3.5% and 119 ± 9.1% for PAH and 80.6 ± 10.4% and 120 ± 10% for PASH. Linearity (R2) was ≥0.99 for all compounds. Method detection limits ranged from 8.8 to 30.2 ng g-1, while limits of quantification ranged from 29.4 to 1011 ng g-1. UAE-MSD was applied to marine sediments exposed to different anthropogenic impacts collected in Todos os Santos Bay, Brazil. PAH concentrations ranged from <LOQ to 667 ng g-1, while PASH levels were <LOQ to 1152 ng g-1. Dibenzothiophene was the compound presented in the highest concentration in all samples, with values up to 249 ng g-1. The results indicated contributions of pyrogenic sources from all compounds. The developed method can potentially be applied to extract trace levels of compounds in different solid matrices to minimize extraction time and solvent consumption.
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Affiliation(s)
- Pedro Victor Bomfim Bahia
- Instituto de Química, Universidade Federal da Bahia, Salvador, BA 40170-115, Brazil; Centro Interdisciplinar de Energia e Ambiente - CIEnAm, Universidade Federal da Bahia, Salvador, BA 40170-115, Brazil
| | - Madson Moreira Nascimento
- Instituto de Química, Universidade Federal da Bahia, Salvador, BA 40170-115, Brazil; Centro Interdisciplinar de Energia e Ambiente - CIEnAm, Universidade Federal da Bahia, Salvador, BA 40170-115, Brazil
| | - Vanessa Hatje
- Instituto de Química, Universidade Federal da Bahia, Salvador, BA 40170-115, Brazil; Centro Interdisciplinar de Energia e Ambiente - CIEnAm, Universidade Federal da Bahia, Salvador, BA 40170-115, Brazil
| | - Jailson Bittencourt de Andrade
- Centro Interdisciplinar de Energia e Ambiente - CIEnAm, Universidade Federal da Bahia, Salvador, BA 40170-115, Brazil; Centro Universitário SENAI-CIMATEC, Av. Orlando Gomes, 1845 - Piatã, Salvador, BA 41650-010, Brazil
| | - Maria Elisabete Machado
- Instituto de Química, Universidade Federal da Bahia, Salvador, BA 40170-115, Brazil; Centro Interdisciplinar de Energia e Ambiente - CIEnAm, Universidade Federal da Bahia, Salvador, BA 40170-115, Brazil.
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