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Article ; Online: Development of a new method for the determination of 4-hydroxyproline as a measurement of collagen content in meat products and dietary supplements by cyclodextrin-assisted electrokinetic chromatography

Alves, Victor Rodrigues / Gonçalves, Samantha / Daguer, Heitor / Micke, Gustavo Amadeu / Vitali, Luciano

Journal of Food Composition and Analysis. 2023 Sept., v. 122 p.105431-

2023

Abstract: The rise in consumption of ultra-processed meat and dietary collagen supplements challenges food quality control. 4-hydroxyproline stands out as collagen signature amino acid, and its determination is a well-known way to estimate collagen content, ... ...

Abstract	The rise in consumption of ultra-processed meat and dietary collagen supplements challenges food quality control. 4-hydroxyproline stands out as collagen signature amino acid, and its determination is a well-known way to estimate collagen content, although for this measurement, the majority of the methods require a mandatory derivatization step. Therefore, this study aimed to develop an innovative method using cyclodextrin-assisted electrokinetic chromatography with indirect UV detection to determine 4-hydroxyproline for collagen monitoring in dietary supplements and meat products. Separations were performed in fused silica capillaries, at 12.5 °C, detection at 220 nm, 30 kV voltage, and hydrodynamic injection. Background electrolyte consisted 25 mmol L⁻¹, 180 mmol L⁻¹, and 10 mmol L⁻¹ of histidine, butylamine, and β-cyclodextrin, respectively, at pH 11.4. Samples were hydrolyzed with sulfuric acid, and their removal was accomplished by simultaneous neutralization/precipitation reactions using strontium carbonate. Validation assured method detectability, accuracy (recoveries 88–102%), and precision (CV < 7%). Dietary supplements and meat products were successfully evaluated, indicating that this method is a feasible quality control alternative.
Keywords	butylamine ; chromatography ; collagen ; derivatization ; electric potential difference ; electrolytes ; food composition ; food quality ; histidine ; hydrodynamics ; meat ; neutralization ; pH ; quality control ; silica ; strontium carbonate ; sulfuric acid ; 4-hydroxyproline ; Cyclodextrin-assisted electrokinetic chromatography ; Green methods ; Indirect UV detection
Language	English
Dates of publication	2023-09
Publishing place	Elsevier Inc.
Document type	Article ; Online
ZDB-ID	743572-1
ISSN	0889-1575 ; 1096-0481
ISSN	0889-1575 ; 1096-0481
DOI	10.1016/j.jfca.2023.105431
Database	NAL-Catalogue (AGRICOLA)

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Article: Chitosan Versus Chitosan-Vanillin Modified: An Evaluation of the Competitive Adsorption of Five Emerging Contaminants

dos Santos Cardoso, Carolina / Vitali, Luciano

Water, air, and soil pollution. 2021 May, v. 232, no. 5

2021

Abstract: Emerging contaminants (ECs) have been studied extensively because of the various damages they can cause to the environment, especially due to the non-treated domestic effluents, which contaminate the water bodies. Therefore, it is important to evaluate ... ...

Abstract	Emerging contaminants (ECs) have been studied extensively because of the various damages they can cause to the environment, especially due to the non-treated domestic effluents, which contaminate the water bodies. Therefore, it is important to evaluate alternatives to remove these compounds. The objective of this work was to evaluate the potential of a new biosorbent from chitosan modified with vanillin (CTSV) to remove isoniazid, cortisol, bisphenol A, 17α-ethinylestradiol, and triclosan by competitive adsorption studies. Structural characterization of the biosorbents was performed by Fourier transform infrared spectroscopy, thermogravimetry, Brunauer-Emmett-Teller, zeta potential, scanning electron microscopy, and ¹H nuclear magnetic resonance. The adsorption for ECs were carried out in an aqueous medium, and quantitative analyzes were performed by HPLC. The effect of pH was evaluated in the pH range 5 to 10 and indicated that better results were found in pH 9 and 8 for CTS and CTSV, respectively. The salt concentrations effect was evaluated in 0.0 to 1.0 mol L⁻¹ and revealed better adsorption conditions in 0.7 mol L⁻¹ of NaCl. The adsorption kinetics pointed to an equilibrium condition reached quickly (with adjustment of data R² > 0.969) with adequacy to pseudo–second-order model for both biosorbents and ECs. The linear isothermal model was suitable for the adsorption isothermal data and distribution constant (KD) showed the highest values for 17α-ethinylestradiol (0.067 L g⁻¹) and triclosan (0.197 L g⁻¹) in CTSV adsorption. Thus, the results indicated that CTSV performed well in removal for the tested ECs, being an interesting alternative, due to the ease of obtaining and abundance of reagents employed in its preparation.
Keywords	Fourier transform infrared spectroscopy ; adsorption ; air ; biosorbents ; bisphenol A ; chitosan ; cortisol ; isoniazid ; models ; nuclear magnetic resonance spectroscopy ; pH ; soil pollution ; thermogravimetry ; triclosan ; vanillin ; zeta potential
Language	English
Dates of publication	2021-05
Size	p. 179.
Publishing place	Springer International Publishing
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	120499-3
ISSN	1573-2932 ; 0049-6979 ; 0043-1168
ISSN (online)	1573-2932
ISSN	0049-6979 ; 0043-1168
DOI	10.1007/s11270-021-05118-y
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Immobilized acetylcholinesterase in magnetic nanoparticles for in-line inhibition studies using a capillary electrophoresis system

Siebert, Diogo Alexandre / Caon, Natália Bruzamarello / Alberton, Michele Debiasi / Vitali, Luciano / Parize, Alexandre Luis / Micke, Gustavo Amadeu

Analytica Chimica Acta. 2023 Sept., v. 1275 p.341566-

2023

Abstract: Enzyme assays can be performed with the capillary electrophoresis technique (CE) in many approaches, such as the immobilized enzyme micro-reactor. Acetylcholinesterase is a promising enzyme to be used when pursuing such a method, as it has already been ... ...

Abstract	Enzyme assays can be performed with the capillary electrophoresis technique (CE) in many approaches, such as the immobilized enzyme micro-reactor. Acetylcholinesterase is a promising enzyme to be used when pursuing such a method, as it has already been explored in the proposal of similar methods of miniaturizing enzyme assays. The present work proposes a novel enzyme micro-reactor, based on the anchorage of the enzyme on magnetic nanoparticles of MnFe₂O₄, with chitosan and glutaraldehyde as the cross-linker in the capillary by means of an arrange of neodymium magnets. The calculated Kₘ of the enzyme evaluated by this method was 1.12 mmol L⁻¹, comparable to other studies in the literature that utilizes immobilized enzymes. Also, IC₅₀ for neostigmine was assessed in 3 different micro-reactors, with an average of 29.42 ± 3.88 μmol L⁻¹. In terms of the micro-reactor stability, it was possible to perform at least 25 experiments with assembled micro-reactor. The method was applied to hydroalcoholic extracts of 7 plant species. Plinia cauliflora had the best result, with 42.31 ± 6.81% of enzyme inhibition in a concentration of 100 mg L⁻¹.
Keywords	Plinia cauliflora ; acetylcholinesterase ; capillary electrophoresis ; chitosan ; enzyme inhibition ; glutaraldehyde ; immobilized enzymes ; magnetism ; nanoparticles ; neodymium ; neostigmine ; Magnetic nanoparticles ; Immobilized enzyme microreactor
Language	English
Dates of publication	2023-09
Publishing place	Elsevier B.V.
Document type	Article ; Online
ZDB-ID	1483436-4
ISSN	1873-4324 ; 0003-2670
ISSN (online)	1873-4324
ISSN	0003-2670
DOI	10.1016/j.aca.2023.341566
Database	NAL-Catalogue (AGRICOLA)

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Article: Bioactive compounds from Pleurotus sajor-caju mushroom recovered by sustainable high-pressure methods

Krümmel, Aline / Gonçalves Rodrigues, Luiz Gustavo / Vitali, Luciano / Ferreira, Sandra Regina Salvador

Lebensmittel-Wissenschaft + Technologie. 2022 Apr. 15, v. 160

2022

Abstract: Antioxidant and antimicrobial properties, and chemical composition from Pleurotus sajor-caju extracts were evaluated from samples obtained by supercritical fluid extraction (SFE) and pressurized liquid extraction (PLE) with ethanol, and by sequential ... ...

Abstract	Antioxidant and antimicrobial properties, and chemical composition from Pleurotus sajor-caju extracts were evaluated from samples obtained by supercritical fluid extraction (SFE) and pressurized liquid extraction (PLE) with ethanol, and by sequential extraction (SE) combining the high-pressure methods. The performance of the SE was compared with the individual methods SFE, PLE and Soxhlet, this last as standard procedure. The results from PLE yields and antioxidant activity were affected by extraction temperature. Best performance was provided by PLE in dynamic mode, compared with static mode, with yield similar to obtained by Soxhlet with ethanol. The first SE fraction, by SFE, presented high antimicrobial potential, while the second PLE fraction had relevant antioxidant action. Linoleic, chlorogenic and vanillic acids were the major compounds identified by GC-MS or LC-ESI-MS/MS analysis. These results show that adequate selection of extraction processes and conditions rises the qualities from P. sajor-caju mushroom.
Keywords	Pleurotus sajor-caju ; antioxidant activity ; antioxidants ; ethanol ; liquids ; mushrooms ; supercritical fluid extraction ; temperature
Language	English
Dates of publication	2022-0415
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	241369-3
ISSN	0460-1173 ; 0023-6438
ISSN	0460-1173 ; 0023-6438
DOI	10.1016/j.lwt.2022.113316
Database	NAL-Catalogue (AGRICOLA)

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Article: Determination of five 3-alkyl-2-methoxypyrazines employing HS-SPME-GC-NPD: Application in evaluation of off-flavor of South American wines

Tavares, Amanda / Mafra, Gabriela / Carasek, Eduardo / Micke, Gustavo Amadeu / Vitali, Luciano

Journal of food composition and analysis. 2022 Jan., v. 105

2022

Abstract: High concentrations of 3-alkyl-2-methoxypyrazines (MPs) in wines can affect the quality and contribute to the rejection of consumers. This work proposes the determination of five MPs in nine wine samples from South America using headspace solid phase ... ...

Abstract	High concentrations of 3-alkyl-2-methoxypyrazines (MPs) in wines can affect the quality and contribute to the rejection of consumers. This work proposes the determination of five MPs in nine wine samples from South America using headspace solid phase microextraction with gas chromatography coupled to nitrogen-phosphorus detector. The separation of the analytes was performed with a HP 5 capillary column in temperature gradient mode and injection in splitless mode. The optimization of the main parameters gives the optimal extraction conditions: Divinylbenzene-Carboxen-Polydimethylsiloxane fiber, sample dilution ratio of 1:3 with water, salt addition of 30 % (w/v) sodium chloride, extraction time of 30 min and extraction temperature of 35 °C. The main parameters of merit of the method were evaluated, showing coefficients of determination greater than 0.995, limits of detection ranging from 6.10–31.2 ng L⁻¹, recovery from 75.2–118% and precisions with values less than 20 %. The validation parameters obtained and the concentration levels of ng L⁻¹ achieved characterize this method as efficient for the determination of these off-flavors in wine. From the nine analysed wines, 3-ethyl-2-methoxypyrazine and 3-isobutyl-2-methoxypyrazine were identified and quantified. The levels are well above the odor detection threshold, thus contributing to generation of off-flavor in the aroma and flavor of these wines.
Keywords	chemical species ; detection limit ; food composition ; gas chromatography ; odors ; off flavors ; sodium chloride ; solid phase microextraction ; temperature ; wines ; South America
Language	English
Dates of publication	2022-01
Publishing place	Elsevier Inc.
Document type	Article
ZDB-ID	743572-1
ISSN	0889-1575 ; 1096-0481
ISSN	0889-1575 ; 1096-0481
DOI	10.1016/j.jfca.2021.104237
Database	NAL-Catalogue (AGRICOLA)

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Article: A non‐conventional approach for obtaining phenolic antioxidants from red guava (Psidium guajava L.) by‐products

Danielski, Renan / Mazzutti, Simone / Ferreira, Sandra Regina Salvador / Vitali, Luciano / Block, Jane Mara

Journal of food processing and preservation. 2022 June, v. 46, no. 6

2022

Abstract: The recovery of phenolic antioxidants from agro‐industrial by‐products using non‐conventional techniques is a powerful tool to explore the bioactive potential of natural sources. Therefore, it is imperative to analyze the most suitable method to ... ...

Abstract	The recovery of phenolic antioxidants from agro‐industrial by‐products using non‐conventional techniques is a powerful tool to explore the bioactive potential of natural sources. Therefore, it is imperative to analyze the most suitable method to investigate a plant material’s phenolic composition. This study used ultra‐turrax (UTE), ultrasonic bath (BUAE), and pressurized liquid (PLE) for soluble phenolic extraction from guava’s pulp and processing waste. UTE at 25°C for 1 h yielded the highest concentration of total phenolics and flavonoids from guava pulp, while PLE for 30 min at 60°C/10 MPa presented the best performance for flavonoids and condensed tannins recovery from guava waste. PLE produced extracts with 39 phenolics and high antioxidant capacity. Besides, scopoletin, resveratrol, and naringin are being reported for the first time in this fruit. These results suggest possible alternatives for the recovery of bioactive compounds, which may be used to develop nutraceuticals and/or functional foods. PRACTICAL APPLICATIONS: Upon guava processing, 30% of fruit’s total volume is lost in the form of by‐products (seeds, peels, and pulp leftovers). Evidence points out that this fraction, along with guava’s pulp, is rich in phenolics with antioxidant properties. An extraction procedure should be conducted to recover these compounds. However, conventional techniques are laborious, time‐consuming, and they generally use a large amount of toxic organic solvent. Ultra‐turrax—UTE, ultrasonic bath—BUAE, and pressurized liquid—PLE are non‐conventional approaches that make possible the reduction of solvents and the recovery of selected phenolics not possible with conventional techniques. These extracts could be further applied to lipid‐rich foods as a natural antioxidant system and/or as an ingredient in the development of nutraceuticals and functional foods.
Keywords	Psidium guajava ; antioxidant activity ; antioxidants ; dietary supplements ; fruits ; guavas ; ingredients ; liquids ; naringin ; pulp ; resveratrol ; scopoletin ; solvents ; toxicity ; ultrasonics
Language	English
Dates of publication	2022-06
Publishing place	John Wiley & Sons, Ltd
Document type	Article
Note	JOURNAL ARTICLE
ZDB-ID	243448-9
ISSN	1745-4549 ; 0145-8892
ISSN (online)	1745-4549
ISSN	0145-8892
DOI	10.1111/jfpp.16502
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Immobilized acetylcholinesterase in magnetic nanoparticles for in-line inhibition studies using a capillary electrophoresis system.

Siebert, Diogo Alexandre / Caon, Natália Bruzamarello / Alberton, Michele Debiasi / Vitali, Luciano / Parize, Alexandre Luis / Micke, Gustavo Amadeu

Analytica chimica acta

2023 Volume 1275, Page(s) 341566

Abstract	Enzyme assays can be performed with the capillary electrophoresis technique (CE) in many approaches, such as the immobilized enzyme micro-reactor. Acetylcholinesterase is a promising enzyme to be used when pursuing such a method, as it has already been explored in the proposal of similar methods of miniaturizing enzyme assays. The present work proposes a novel enzyme micro-reactor, based on the anchorage of the enzyme on magnetic nanoparticles of MnFe
MeSH term(s)	Acetylcholinesterase ; Magnetite Nanoparticles ; Enzymes, Immobilized ; Magnets ; Electrophoresis, Capillary/methods
Chemical Substances	Acetylcholinesterase (EC 3.1.1.7) ; Magnetite Nanoparticles ; Enzymes, Immobilized
Language	English
Publishing date	2023-06-27
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	1483436-4
ISSN	1873-4324 ; 0003-2670
ISSN (online)	1873-4324
ISSN	0003-2670
DOI	10.1016/j.aca.2023.341566
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Article ; Online: Simultaneous extraction/derivatization for the analysis of sulfite by capillary electrophoresis: A high-throughput reference method to meet the demand of seafood inspection

Gonçalves, Samantha / Molognoni, Luciano / Daguer, Heitor / Pimenta, Ricardo / Barcellos Hoff, Rodrigo / Amadeu Micke, Gustavo / Vitali, Luciano

Food Research International. 2022 Nov., v. 161 p.111780-

2022

Abstract: Sulfite is widely used to prevent enzymatic browning in shrimp and lobster processing. However, sulfite may cause allergy in sensitive consumers. Thus, regulatory agencies set limits for its use. Sulfite is usually controlled by the normalized Monier- ... ...

Abstract	Sulfite is widely used to prevent enzymatic browning in shrimp and lobster processing. However, sulfite may cause allergy in sensitive consumers. Thus, regulatory agencies set limits for its use. Sulfite is usually controlled by the normalized Monier-Williams (MW) titrimetric method that allows a limited number of samples to be analyzed. This manuscript consolidates an innovative method for sulfite inspection in seafood by capillary zone electrophoresis with diode array detector (CZE-DAD). A simple, fast, and simultaneous extraction and derivatization method was developed to provide high throughput for analytical routine. The high instability of the sulfite was suppressed by its derivatization with formaldehyde producing hydroxymethylsulfonate. The evaluation of its analytical performance yielded excellent results in compliance with the strict parameters required for metrological accreditation. The CZE-DAD method was selective and specific when submitted to confirmatory evaluations by liquid chromatography coupled to mass spectrometry. The limit of detection (3.50 mg kg⁻¹), limit of quantitation (11.7 mg kg⁻¹) and recoveries (99–103%) were adequate for sample analysis. The measurement uncertainty was estimated by the propagation of errors and experimental standard uncertainties (precision, accuracy, and analytical curves) and type B uncertainties from traceable measurement instruments. The low relative uncertainty (10%) and the adequate reproducibility demonstrated method suitability. The CZE-DAD results were compared to the MW method through the respective expanded standard uncertainties and normalized error. This new method is promising to be used in seafood inspection and continuous laboratory evaluations using instrumentation not very expensive to acquire and maintain.
Keywords	capillary zone electrophoresis ; compliance ; derivatization ; detection limit ; diodes ; food research ; formaldehyde ; hypersensitivity ; instrumentation ; liquid chromatography ; lobsters ; mass spectrometry ; seafoods ; shrimp ; sulfites ; uncertainty ; Sulfite ; Food analysis ; Preservatives
Language	English
Dates of publication	2022-11
Publishing place	Elsevier Ltd
Document type	Article ; Online
ZDB-ID	1111695-x
ISSN	1873-7145 ; 0963-9969
ISSN (online)	1873-7145
ISSN	0963-9969
DOI	10.1016/j.foodres.2022.111780
Database	NAL-Catalogue (AGRICOLA)

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Article: Green extraction of phenolic compounds and carrageenan from the red alga Kappaphycus alvarezii

Rudke, Adenilson Renato / da Silva, Mayara / de Andrade, Cristiano José / Vitali, Luciano / Ferreira, Sandra Regina Salvador

Algal research. 2022 Sept. 22,

2022

Abstract: Kappaphycus alvarezii (KA) is a widespread worldwide alga, and one of the main industrial sources of carrageenan. Besides, KA biomass also contains other substances such as phenolic compounds and fatty acids that can be recovered by several methods. Then, ...

Abstract	Kappaphycus alvarezii (KA) is a widespread worldwide alga, and one of the main industrial sources of carrageenan. Besides, KA biomass also contains other substances such as phenolic compounds and fatty acids that can be recovered by several methods. Then, this work aimed to investigate the eco-friendly methods, for the recovery of fatty acids, phenolics, and carrageenan fractions. The eco-friendly methods are faster, produce higher yields, and can be cost-effective in comparison with conventional methods. The performance of the eco-friendly methods (supercritical fluid, pressurized liquid, microwave assisted, and high-pressure carrageenan extractions) was compared with conventional techniques (maceration or Soxhlet) in terms of yield, chemical profile by gas and liquid chromatography, total phenolic content (TPC), antioxidant activity by 1,1-diphenyl-2-picrylhydrazyl (DPPH) and Ferric reducing antioxidant power (FRAP) procedures, viscosity and gel strength of the carrageenan fraction. The results showed pressurized liquid extraction samples with the highest antioxidant potential and TPC (up to 2 to 4 times higher than conventional). Besides, the carrageenan fraction was efficiently recovered by microwave assisted extraction (MAE) and by pressurized-water carrageenan extraction (PWCE), and the samples presented viscosity and gel strength similar to that obtained by water maceration.
Keywords	2,2-diphenyl-1-picrylhydrazyl ; Kappaphycus alvarezii ; algae ; antioxidant activity ; biomass ; carrageenan ; cost effectiveness ; gel strength ; liquid chromatography ; liquids ; maceration ; research ; viscosity
Language	English
Dates of publication	2022-0922
Publishing place	Elsevier B.V.
Document type	Article
Note	Pre-press version
ISSN	2211-9264
DOI	10.1016/j.algal.2022.102866
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Article: Phenolic compounds recovered from ora-pro-nobis leaves by microwave assisted extraction

Torres, Talyta Mayara Silva / Mazzutti, Simone / Castiani, Marcos Antonio / Siddique, Ilyas / Vitali, Luciano / Ferreira, Sandra Regina Salvador

Biocatalysis and agricultural biotechnology. 2022 Jan., v. 39

2022

Abstract: Ora-pro-nobis is an ornamental plant, often used as food in some regions of Brazil, and Pereskia grandifolia is one of the less explored specie of this nutritional plant. To understand the antioxidant potential and phenolic profile of ora-pro-nobis ... ...

Abstract	Ora-pro-nobis is an ornamental plant, often used as food in some regions of Brazil, and Pereskia grandifolia is one of the less explored specie of this nutritional plant. To understand the antioxidant potential and phenolic profile of ora-pro-nobis leaves, the micro-wave assisted extraction (MAE) was held using the green solvents ethanol and water. An optimization was made using Box-Behnken experimental design (3²), with process time, temperature and solvent (% of water/ethanol) as variables. The evaluated responses were the process yield, combined with antioxidant capacity (DPPH, ABTS and FRAP methods) and total phenolic content (TPC) of the recovered extracts. Soxhlet method with ethanol was performed for comparison purpose. The phenolic profile of extract samples was assessed by LC-ESI-MS/MS analysis. High yield values were provided by 50% ethanol as solvent at 150 °C. Best antioxidant potential from DPPH and FRAP methods were provided by ethanolic extracts at 110 °C, while water extracts at 150 °C provided best ABTS results. High TPC recovery was found in 50% ethanol samples at 70 °C. Overall, 24 phenolic compounds were identified, within caffeic acid, ellagic acid, p-anisic acid, p-coumaric acid kaempferol and quercetin as the main components. Ellagic acid and p-anisic acid were firstly reported associated to ora-pro-nobis leaves. The optimization of the results indicates that 150 °C, 12.5 min of MAE and ethanol as solvent provided the best combined responses. The use of MAE for ora-pro-nobis leaves is a novelty that must be followed to explore green methods to value natural products.
Keywords	Pereskia ; agricultural biotechnology ; antioxidant activity ; biocatalysis ; caffeic acid ; ellagic acid ; ethanol ; experimental design ; kaempferol ; ornamental plants ; p-coumaric acid ; processing time ; quercetin ; solvents ; temperature ; Brazil
Language	English
Dates of publication	2022-01
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2642052-1
ISSN	1878-8181
ISSN	1878-8181
DOI	10.1016/j.bcab.2021.102238
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