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Gennari A, Simon R, Benvenutti EV, Nicolodi S, Renard G, Chies JM, Volpato G, Volken de Souza CF. Magnetic core-shell cellulose system for the oriented immobilization of a recombinant β-galactosidase with a protein tag. Int J Biol Macromol 2024; 256:128418. [PMID: 38029902 DOI: 10.1016/j.ijbiomac.2023.128418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 11/22/2023] [Accepted: 11/23/2023] [Indexed: 12/01/2023]
Abstract
The objective of this study was to immobilize a recombinant β-galactosidase (Gal) tagged with a cellulose-binding domain (CBD) onto a magnetic core-shell (CS) cellulose system. After 30 min of reaction, 4 U/capsule were immobilized (CS@Gal), resulting in levels of yield and efficiency exceeding 80 %. The optimal temperature for β-galactosidase-CBD activity increased from 40 to 50 °C following oriented immobilization. The inhibitory effect of galactose decreased in the enzyme reactions catalyzed by CS@Gal, and Mg2+ increased the immobilized enzyme activity by 40 % in the magnetic CS cellulose system. The relative enzyme activity of the CS@Gal was 20 % higher than that of the soluble enzyme activity after 20 min at 50 °C. The CS support and CS@Gal capsules exhibited an average size of 8 ± 1 mm, with the structure of the shell (alginate-pectin-cellulose) enveloping and isolating the magnetic core. The immobilized β-galactosidase-CBD within the magnetic CS cellulose system retained ∼80 % of its capacity to hydrolyze lactose from skim milk after 10 reuse cycles. This study unveils a novel and promising support for the oriented immobilization of recombinant β-galactosidase using a magnetic CS system and a CBD tag. This support facilitates β-galactosidase reuse and efficient separation, consequently enhancing the catalytic properties of the enzyme.
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Affiliation(s)
- Adriano Gennari
- Laboratório de Biotecnologia de Alimentos, Universidade do Vale do Taquari - Univates, Lajeado, RS, Brazil; Programa de Pós-Graduação em Biotecnologia, Universidade do Vale do Taquari - Univates, Lajeado, RS, Brazil
| | - Renate Simon
- Laboratório de Biotecnologia de Alimentos, Universidade do Vale do Taquari - Univates, Lajeado, RS, Brazil
| | | | - Sabrina Nicolodi
- Instituto de Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Gaby Renard
- Quatro G Pesquisa & Desenvolvimento Ltda, Porto Alegre, RS, Brazil
| | | | - Giandra Volpato
- Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul - IFRS, Campus Porto Alegre, Porto Alegre, RS, Brazil
| | - Claucia Fernanda Volken de Souza
- Laboratório de Biotecnologia de Alimentos, Universidade do Vale do Taquari - Univates, Lajeado, RS, Brazil; Programa de Pós-Graduação em Biotecnologia, Universidade do Vale do Taquari - Univates, Lajeado, RS, Brazil.
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de Oliveira RS, Funk NL, dos Santos J, de Oliveira TV, de Oliveira EG, Petzhold CL, Costa TMH, Benvenutti EV, Deon M, Beck RCR. Bioadhesive 3D-Printed Skin Drug Delivery Polymeric Films: From the Drug Loading in Mesoporous Silica to the Manufacturing Process. Pharmaceutics 2022; 15:pharmaceutics15010020. [PMID: 36678649 PMCID: PMC9861290 DOI: 10.3390/pharmaceutics15010020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 11/30/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022] Open
Abstract
The alliance between 3D printing and nanomaterials brings versatile properties to pharmaceuticals, but few studies have explored this approach in the development of skin delivery formulations. In this study, clobetasol propionate (CP) was loaded (about 25% w/w) in mesoporous silica nanomaterial (MSN) to formulate novel bioadhesive and hydrophilic skin delivery films composed of pectin (5% w/v) and carboxymethylcellulose (5% w/v) by 3D printing. As a hydrophobic model drug, CP was encapsulated in MSN at a 3:1 (w/w) ratio, resulting in a decrease of CP crystallinity and an increase of its dissolution efficiency after 72 h (65.70 ± 6.52%) as compared to CP dispersion (40.79 ± 4.75%), explained by its partial change to an amorphous form. The CP-loaded MSN was incorporated in an innovative hydrophilic 3D-printable ink composed of carboxymethylcellulose and pectin (1:1, w/w), which showed high tensile strength (3.613 ± 0.38 N, a homogenous drug dose (0.48 ± 0.032 mg/g per film) and complete CP release after 10 h. Moreover, the presence of pectin in the ink increased the skin adhesion of the films (work of adhesion of 782 ± 105 mN·mm). Therefore, the alliance between MSN and the novel printable ink composed of carboxymethylcellulose and pectin represents a new platform for the production of 3D-printed bioadhesive films, opening a new era in the development of skin delivery systems.
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Affiliation(s)
- Rafaela Santos de Oliveira
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90610-900, Brazil
- Laboratório de Nanocarreadores e Impressão 3D em Tecnologia Farmacêutica (Nano3D), Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90610-000, Brazil
| | - Nadine Lysyk Funk
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90610-900, Brazil
- Laboratório de Nanocarreadores e Impressão 3D em Tecnologia Farmacêutica (Nano3D), Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90610-000, Brazil
| | - Juliana dos Santos
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90610-900, Brazil
- Laboratório de Nanocarreadores e Impressão 3D em Tecnologia Farmacêutica (Nano3D), Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90610-000, Brazil
| | - Thayse Viana de Oliveira
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90610-900, Brazil
- Laboratório de Nanocarreadores e Impressão 3D em Tecnologia Farmacêutica (Nano3D), Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90610-000, Brazil
| | - Edilene Gadelha de Oliveira
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90610-900, Brazil
| | - Cesar Liberato Petzhold
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90650-001, Brazil
| | - Tania Maria Haas Costa
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90650-001, Brazil
| | | | - Monique Deon
- Laboratório de Nanocarreadores e Impressão 3D em Tecnologia Farmacêutica (Nano3D), Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90610-000, Brazil
- Departamento de Farmacociências, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS 90050-170, Brazil
| | - Ruy Carlos Ruver Beck
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90610-900, Brazil
- Laboratório de Nanocarreadores e Impressão 3D em Tecnologia Farmacêutica (Nano3D), Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90610-000, Brazil
- Correspondence: ; Tel.: +55-51-3308-5951
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Gennari A, Simon R, Sperotto NDDM, Bizarro CV, Basso LA, Machado P, Benvenutti EV, Renard G, Chies JM, Volpato G, Volken de Souza CF. Application of cellulosic materials as supports for single-step purification and immobilization of a recombinant β-galactosidase via cellulose-binding domain. Int J Biol Macromol 2022; 199:307-317. [PMID: 35007635 DOI: 10.1016/j.ijbiomac.2022.01.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 12/17/2021] [Accepted: 01/02/2022] [Indexed: 02/06/2023]
Abstract
This study aimed to develop single-step purification and immobilization processes on cellulosic supports of β-galactosidase from Kluyveromyces sp. combined with the Cellulose-Binding Domain (CBD) tag. After 15 min of immobilization, with an enzymatic load of 150 U/gsupport, expressed activity values reached 106.88 (microcrystalline cellulose), 115.03 (alkaline nanocellulose), and 108.47 IU/g (acid nanocellulose). The derivatives produced were less sensitive to the presence of galactose in comparison with the soluble purified enzyme. Among the cations assessed (Na+, K+, Mg2+, and Ca2+), magnesium provided the highest increase in the enzymatic activity of β-galactosidases immobilized on cellulosic supports. Supports and derivatives showed no cytotoxic effect on the investigated cell cultures (HepG2 and Vero). Derivatives showed high operational stability in the hydrolysis of milk lactose and retained from 53 to 64% of their hydrolysis capacity after 40 reuse cycles. This study obtained biocatalyzers with promising characteristics for application in the food industry. Biocatalyzers were obtained through a low-cost one-step sustainable bioprocess of purification and immobilization of a β-galactosidase on cellulose via CBD.
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Affiliation(s)
- Adriano Gennari
- Laboratório de Biotecnologia de Alimentos, Brazil; Universidade do Vale do Taquari - Univates, Lajeado, RS, Brazil
| | - Renate Simon
- Laboratório de Biotecnologia de Alimentos, Brazil
| | | | - Cristiano Valim Bizarro
- Instituto Nacional de Ciência e Tecnologia em Tuberculose, Centro de Pesquisas em Biologia Molecular e Funcional, Brazil; Programa de Pós-Graduação em Biologia Celular e Molecular, Brazil
| | - Luiz Augusto Basso
- Instituto Nacional de Ciência e Tecnologia em Tuberculose, Centro de Pesquisas em Biologia Molecular e Funcional, Brazil; Programa de Pós-Graduação em Biologia Celular e Molecular, Brazil; Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Pablo Machado
- Instituto Nacional de Ciência e Tecnologia em Tuberculose, Centro de Pesquisas em Biologia Molecular e Funcional, Brazil; Programa de Pós-Graduação em Biologia Celular e Molecular, Brazil; Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | | | - Gaby Renard
- Instituto Nacional de Ciência e Tecnologia em Tuberculose, Centro de Pesquisas em Biologia Molecular e Funcional, Brazil
| | | | - Giandra Volpato
- Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul - IFRS, Campus Porto Alegre, Porto Alegre, RS, Brazil
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Gennari A, Simon R, Sperotto NDDM, Bizarro CV, Basso LA, Machado P, Benvenutti EV, Da Cas Viegas A, Nicolodi S, Renard G, Chies JM, Volpato G, Volken de Souza CF. One-step purification of a recombinant beta-galactosidase using magnetic cellulose as a support: Rapid immobilization and high thermal stability. Bioresour Technol 2022; 345:126497. [PMID: 34883192 DOI: 10.1016/j.biortech.2021.126497] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/30/2021] [Accepted: 12/01/2021] [Indexed: 06/13/2023]
Abstract
For the first time, this work reported the one-step purification and targeted immobilization process of a β-galactosidase (Gal) with the Cellulose Binding Domain (CBD) tag, by binding it to different magnetic cellulose supports. The process efficiency after β-galactosidase-CBD immobilization on magnetic cellulose-based supports showed values of approximately 90% for all evaluated enzymatic loads. Compared with free Gal, derivatives showed affinity values between β-galactosidase and the substrate 1.2 × higher in the lactose hydrolysis of milk. β-Galactosidase-CBD's oriented immobilization process on supports increased the thermal stability of the immobilized enzyme by up to 7 × . After 15 cycles of reuse, both enzyme preparations showed a relative hydrolysis percentage of 50% of lactose in milk. The oriented immobilization process developed for purifying recombinant proteins containing the CBD tag enabled the execution of both steps simultaneously and quickly and the obtention of β-galactosidases with promising catalytic characteristics for application in the food and pharmaceutical industries.
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Affiliation(s)
- Adriano Gennari
- Laboratório de Biotecnologia de Alimentos, Universidade do Vale do Taquari - Univates, Lajeado, RS, Brazil; Programa de Pós-Graduação em Biotecnologia, Universidade do Vale do Taquari - Univates, Lajeado, RS, Brazil
| | - Renate Simon
- Laboratório de Biotecnologia de Alimentos, Universidade do Vale do Taquari - Univates, Lajeado, RS, Brazil
| | - Nathalia Denise de Moura Sperotto
- Instituto Nacional de Ciência e Tecnologia em Tuberculose, Centro de Pesquisas em Biologia Molecular e Funcional, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Cristiano Valim Bizarro
- Instituto Nacional de Ciência e Tecnologia em Tuberculose, Centro de Pesquisas em Biologia Molecular e Funcional, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil; Programa de Pós-Graduação em Biologia Celular e Molecular, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Luiz Augusto Basso
- Instituto Nacional de Ciência e Tecnologia em Tuberculose, Centro de Pesquisas em Biologia Molecular e Funcional, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil; Programa de Pós-Graduação em Biologia Celular e Molecular, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil; Programa de Pós-Graduação em Medicina e Ciências da Saúde, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Pablo Machado
- Instituto Nacional de Ciência e Tecnologia em Tuberculose, Centro de Pesquisas em Biologia Molecular e Funcional, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil; Programa de Pós-Graduação em Biologia Celular e Molecular, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil; Programa de Pós-Graduação em Medicina e Ciências da Saúde, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | | | | | - Sabrina Nicolodi
- Instituto de Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Gaby Renard
- Instituto Nacional de Ciência e Tecnologia em Tuberculose, Centro de Pesquisas em Biologia Molecular e Funcional, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | | | - Giandra Volpato
- Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul (IFRS), Campus Porto Alegre, Porto Alegre, RS, Brazil
| | - Claucia Fernanda Volken de Souza
- Laboratório de Biotecnologia de Alimentos, Universidade do Vale do Taquari - Univates, Lajeado, RS, Brazil; Programa de Pós-Graduação em Biotecnologia, Universidade do Vale do Taquari - Univates, Lajeado, RS, Brazil.
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Gamboa VS, Benvenutti EV, Kinast ÉJ, Pires M, Gasparin FP, Ries LADS. Efficient removal of chromium(VI) from dilute aqueous solutions using agro-industrial residue based on parboiled-rice husk ash. CHEM ENG COMMUN 2021. [DOI: 10.1080/00986445.2021.1948405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | | | - Éder Júlio Kinast
- State University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Marçal Pires
- Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
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de Andrade BC, Gennari A, Renard G, Nervis BDR, Benvenutti EV, Costa TMH, Nicolodi S, da Silveira NP, Chies JM, Volpato G, Volken de Souza CF. Synthesis of magnetic nanoparticles functionalized with histidine and nickel to immobilize His-tagged enzymes using β-galactosidase as a model. Int J Biol Macromol 2021; 184:159-169. [PMID: 34126150 DOI: 10.1016/j.ijbiomac.2021.06.060] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 05/31/2021] [Accepted: 06/09/2021] [Indexed: 11/26/2022]
Abstract
The aim of this study was to synthesize iron magnetic nanoparticles functionalized with histidine and nickel (Fe3O4-His-Ni) to be used as support materials for oriented immobilization of His-tagged recombinant enzymes of high molecular weight, using β-galactosidase as a model. The texture, morphology, magnetism, thermal stability, pH and temperature reaction conditions, and the kinetic parameters of the biocatalyst obtained were assessed. In addition, the operational stability of the biocatalyst in the lactose hydrolysis of cheese whey and skim milk by batch processes was also assessed. The load of 600 Uenzyme/gsupport showed the highest recovered activity value (~50%). After the immobilization process, the recombinant β-galactosidase (HisGal) showed increased substrate affinity and greater thermal stability (~50×) compared to the free enzyme. The immobilized β-galactosidase was employed in batch processes for lactose hydrolysis of skim milk and cheese whey, resulting in hydrolysis rates higher than 50% after 15 cycles of reuse. The support used was obtained in the present study without modifying chemical agents. The support easily recovered from the reaction medium due to its magnetic characteristics. The iron nanoparticles functionalized with histidine and nickel were efficient in the oriented immobilization of the recombinant β-galactosidase, showing its potential application in other high-molecular-weight enzymes.
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Affiliation(s)
- Bruna Coelho de Andrade
- Food Biotechnology Laboratory, Biotechnology Graduate Program, University of Vale do Taquari - Univates, Lajeado, RS, Brazil
| | - Adriano Gennari
- Food Biotechnology Laboratory, Biotechnology Graduate Program, University of Vale do Taquari - Univates, Lajeado, RS, Brazil
| | - Gaby Renard
- National Institute of Science and Technology in Tuberculosis, Research Center for Molecular and Functional Biology, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | | | | | | | - Sabrina Nicolodi
- Institute of Physics, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | | | | | - Giandra Volpato
- Biotechnology course, Federal Institute of Education, Science, and Technology of Rio Grande do Sul - IFRS, Porto Alegre Campus, Porto Alegre, RS, Brazil
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Ricardi NC, Arenas LT, Benvenutti EV, Hinrichs R, Flores EEE, Hertz PF, Costa TMH. High performance biocatalyst based on β-d-galactosidase immobilized on mesoporous silica/titania/chitosan material. Food Chem 2021; 359:129890. [PMID: 33934029 DOI: 10.1016/j.foodchem.2021.129890] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 03/18/2021] [Accepted: 04/10/2021] [Indexed: 12/20/2022]
Abstract
A new support for the immobilization of β-d-galactosidase from Kluyveromyces lactis was developed, consisting of mesoporous silica/titania with a chitosan coating. This support presents a high available surface area and adequate pore size for optimizing the immobilization efficiency of the enzyme and, furthermore, maintaining its activity. The obtained supported biocatalyst was applied in enzyme hydrolytic activity tests with o-NPG, showing high activity 1223 Ug-1, excellent efficiency (74%), and activity recovery (54%). Tests of lactose hydrolysis in a continuous flow reactor showed that during 14 days operation, the biocatalyst maintained full enzymatic activity. In a batch system, after 15 cycles, it retained approximately 90% of its initial catalytic activity and attained full conversion of the lactose 100% (±12%). Additionally, with the use of the mesoporous silica/titania support, the biocatalyst presented no deformation and fragmentation, in both systems, demonstrating high operational stability and appropriate properties for applications in food manufacturing.
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Affiliation(s)
| | - Leliz Ticona Arenas
- Instituto de Química (IQ), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Edilson Valmir Benvenutti
- Instituto de Química (IQ), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Ruth Hinrichs
- Instituto de Geociências (IGEO), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Elí Emanuel Esparza Flores
- Instituto de Ciência e Tecnologia de Alimentos (ICTA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Plinho Francisco Hertz
- Instituto de Ciência e Tecnologia de Alimentos (ICTA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Tania Maria Haas Costa
- Instituto de Química (IQ), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
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Morawski FDM, Xavier BB, Virgili AH, Caetano KDS, de Menezes EW, Benvenutti EV, Costa TMH, Arenas LT. A novel electrochemical platform based on mesoporous silica/titania and gold nanoparticles for simultaneous determination of norepinephrine and dopamine. Mater Sci Eng C Mater Biol Appl 2020; 120:111646. [PMID: 33545818 DOI: 10.1016/j.msec.2020.111646] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 09/11/2020] [Accepted: 10/14/2020] [Indexed: 12/11/2022]
Abstract
An amorphous and mesoporous silica/titania (SiTi) material was synthesized by sol-gel method and its surface was modified with gold nanoparticles (AuNP) previously stabilized in a chitosan solution. The presence of small AuNP, with diameter lower than 10 nm was confirmed by transmission electron microscopy (TEM) and UV-Vis spectroscopy. Carbon paste electrodes were prepared to test the electrochemical properties by using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in [Fe(CN)6]3-/4- solution probe whereby the material silica-titania/gold nanoparticles (SiTi/AuNP) showed a huge improvement in the redox peak current and low charge transfer resistance. This electrode presented a good response for both norepinephrine and dopamine by means of square wave voltammetry (SWV) measurements; great sensitivity for both analytes, in an extensive linear range, was obtained. The limits of detection were 0.35 μmol L-1 and 0.57 μmol L-1 for norepinephrine and dopamine, respectively. Additionally, this electrode showed high selectivity for both analytes and it was applied in the simultaneous determination of norepinephrine and dopamine. The sensor was also tested in simulated biological fluids presenting a good recovery. The SWV electrochemical response of norepinephrine was also investigated in the presence of possible interferers such as uric acid, ascorbic acid and glucose and there was no significant interference. The prepared electrode also exhibits good reproducibility for norepinephrine detection, with relative standard deviation of 5.19%.
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Affiliation(s)
- Franciele de Matos Morawski
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Brenda Borges Xavier
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Anike Hübner Virgili
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Karine Dos Santos Caetano
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Eliana Weber de Menezes
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Edilson Valmir Benvenutti
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Tania Maria Haas Costa
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Leliz Ticona Arenas
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil.
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Deon M, Carminatti Ricardi N, Carvalho de Andrade R, Hertz PF, Nicolodi S, Costa TMH, Bussamara R, Benvenutti EV, de Menezes EW. Designing a Support for Lipase Immobilization Based On Magnetic, Hydrophobic, and Mesoporous Silica. Langmuir 2020; 36:10147-10155. [PMID: 32787062 DOI: 10.1021/acs.langmuir.0c01594] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A mesoporous, magnetic, and hydrophobic material was designed step by step to act as a support for lipase immobilization. Its pore size (8.0 nm) is compatible with the size of lipase from Thermomyces lanuginosus (TLL), and its hydrophobic surface (contact angle of a water drop = 125°) was planned to interact with lipase on its interfacially activated form (open conformation). The presence of magnetite particles provides magnetic retrieval of the material and enables recyclability of the biocatalysts. Regarding immobilization parameters, the hydrophobic support was tested in comparison to the unmodified hydrophilic support in phosphate buffer solution (50 mmol L-1, pH 7.5) at 25 °C. Hydrophobicity was found to be critical for the amount of immobilized TLL (immobilization yield of 97% versus 36% for the hydrophilic support), whereas the hydrophilic support favors the native conformational state and substrate access to the enzyme's catalytic site (specific activity of 5.7 versus 4.7 U g-1 for the hydrophobic support, even when it has higher TLL content). Therefore, the hydrophobic support immobilizes higher amounts of TLL and the hydrophilic support keeps the enzyme hyperactivated. Last, due to the stronger interactions of TLL with hydrophobic surfaces, the hydrophobic support offers better preservation of enzyme activity in repeated cycles (76% of activity retained after three cycles versus 50% for the hydrophilic support).
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Affiliation(s)
- Monique Deon
- Instituto de Quı́mica, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | | | | | - Plinho Francisco Hertz
- Instituto de Ciência e Tecnologia de Alimentos, UFRGS, CP 15015, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Sabrina Nicolodi
- Instituto de Fı́sica, UFRGS, CP 15051, CEP 91501-970 Porto Alegre, RS, Brazil
| | | | - Roberta Bussamara
- Instituto de Quı́mica, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
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Gennari A, Mobayed FH, Rafael RDS, Catto AL, Benvenutti EV, Rodrigues RC, Sperotto RA, Volpato G, Souza CFVD. STABILIZATION STUDY OF TETRAMERIC Kluyveromyces lactis β-GALACTOSIDASE BY IMMOBILIZATION ON IMMOBEAD: THERMAL, PHYSICO-CHEMICAL, TEXTURAL AND CATALYTIC PROPERTIES. Braz J Chem Eng 2019. [DOI: 10.1590/0104-6632.20190364s20190235] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
| | | | | | | | | | | | | | - Giandra Volpato
- Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul, Brazil
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11
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Dal Magro L, de Moura KS, Backes BE, de Menezes EW, Benvenutti EV, Nicolodi S, Klein MP, Fernandez-Lafuente R, Rodrigues RC. Immobilization of pectinase on chitosan-magnetic particles: Influence of particle preparation protocol on enzyme properties for fruit juice clarification. ACTA ACUST UNITED AC 2019; 24:e00373. [PMID: 31516853 PMCID: PMC6728273 DOI: 10.1016/j.btre.2019.e00373] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 08/19/2019] [Accepted: 08/22/2019] [Indexed: 12/16/2022]
Abstract
Magnetic-chitosan particles were prepared following three different protocols enabling the preparation of particles with different sizes - nano (Nano-CMag, Micro (Micro-CMag) and Macro (Macro-CMag) - and used for pectinase immobilization and clarification of grape, apple and orange juices. The particle size had a great effect in the kinetic parameters, Nano-CMag biocatalyst presented the highest Vmax value (78.95 mg. min-1), followed by Micro-CMag and Macro-CMag, with Vmax of 57.20 mg.min-1 and 46.03 mg.min-1, respectively. However, the highest thermal stability was achieved using Macro-CMag, that was 8 and 3-times more stable than Nano-CMag and Micro-CMag biocatalysts, respectively. Pectinase immobilized on Macro-CMag kept 85% of its initial activity after 25 batch cycles in orange juice clarification. These results suggested that the chitosan magnetic biocatalysts presented great potential application as clarifying catalysts for the fruit juice industry and the great importance of the chitosan particles preparation on the final biocatalyst properties.
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Affiliation(s)
- Lucas Dal Magro
- Biotechnology, Bioprocess and Biocatalysis Group, Institute of Food Science and Technology, Federal University of Rio Grande do Sul, Av. Bento Gonçalves, 9500, P.O. Box 15090, ZC 91501-970, Porto Alegre, RS, Brazil
- Department of Biocatalysis, ICP-CSIC, Campus UAM-CSIC, Cantoblanco, ZC 28049, Madrid, Spain
| | - Kelly Silva de Moura
- Biotechnology, Bioprocess and Biocatalysis Group, Institute of Food Science and Technology, Federal University of Rio Grande do Sul, Av. Bento Gonçalves, 9500, P.O. Box 15090, ZC 91501-970, Porto Alegre, RS, Brazil
| | - Betina Elys Backes
- Biotechnology, Bioprocess and Biocatalysis Group, Institute of Food Science and Technology, Federal University of Rio Grande do Sul, Av. Bento Gonçalves, 9500, P.O. Box 15090, ZC 91501-970, Porto Alegre, RS, Brazil
| | - Eliana Weber de Menezes
- Laboratory of Solids and Surfaces, Institute of Chemistry, UFRGS, P.O. Box 15003, ZC 91501-970, Porto Alegre, RS, Brazil
| | - Edilson Valmir Benvenutti
- Laboratory of Solids and Surfaces, Institute of Chemistry, UFRGS, P.O. Box 15003, ZC 91501-970, Porto Alegre, RS, Brazil
| | - Sabrina Nicolodi
- Magnetism Laboratory, Institute of Physics, Federal University of Rio Grande do Sul, P.O. Box 15051, ZC 91501-970, Porto Alegre, RS, Brazil
| | - Manuela P. Klein
- Department of Nutrition, Federal University of Health Sciences of Porto Alegre (UFCSPA), ZC 90050-170, Porto Alegre, RS, Brazil
| | - Roberto Fernandez-Lafuente
- Department of Biocatalysis, ICP-CSIC, Campus UAM-CSIC, Cantoblanco, ZC 28049, Madrid, Spain
- Corresponding authors.
| | - Rafael C. Rodrigues
- Biotechnology, Bioprocess and Biocatalysis Group, Institute of Food Science and Technology, Federal University of Rio Grande do Sul, Av. Bento Gonçalves, 9500, P.O. Box 15090, ZC 91501-970, Porto Alegre, RS, Brazil
- Corresponding authors.
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Dal Magro L, Silveira VC, de Menezes EW, Benvenutti EV, Nicolodi S, Hertz PF, Klein MP, Rodrigues RC. Magnetic biocatalysts of pectinase and cellulase: Synthesis and characterization of two preparations for application in grape juice clarification. Int J Biol Macromol 2018; 115:35-44. [DOI: 10.1016/j.ijbiomac.2018.04.028] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/20/2018] [Accepted: 04/05/2018] [Indexed: 10/17/2022]
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13
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Montenegro LMP, de Souza LV, Lima KO, de Oliveira HPM, Fernandes AU, Morawski FDM, Benvenutti EV, Arenas LT, Bianchini D. Copper Porphyrin Immobilized on MCM-41 Surface by Using Aminopropyl as Coupling Agent and Its Use in Electrochemical Oxygen Determination. J Inorg Organomet Polym Mater 2018. [DOI: 10.1007/s10904-018-0919-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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14
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Ricardi NC, de Menezes EW, Valmir Benvenutti E, da Natividade Schöffer J, Hackenhaar CR, Hertz PF, Costa TMH. Highly stable novel silica/chitosan support for β-galactosidase immobilization for application in dairy technology. Food Chem 2018; 246:343-350. [DOI: 10.1016/j.foodchem.2017.11.026] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 11/06/2017] [Accepted: 11/08/2017] [Indexed: 11/16/2022]
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Andrade DFD, Vukosavljevic B, Benvenutti EV, Pohlmann AR, Guterres SS, Windbergs M, Beck RCR. Redispersible spray-dried lipid-core nanocapsules intended for oral delivery: the influence of the particle number on redispersibility. Pharm Dev Technol 2017; 23:414-425. [PMID: 29095657 DOI: 10.1080/10837450.2017.1400559] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
This study proposes a new approach to produce easily redispersible spray-dried lipid-core nanocapsules (LNC) intended for oral administration, evaluating the influence of the particle number density of the fed sample. The proposed approach to develop redispersible spray-dried LNC formulations intended for oral route is innovative, evidencing the needing of an optimization of the initial particle number density in the liquid suspension of nanocapsules. A mixture of maltodextrin and L-leucine (90:10 w/w) was used as drying adjuvant. Dynamic light scattering, turbidimetry, determination of surface area and pore size distribution, electron microscopy and confocal Raman microscopy (CRM) were used to characterize the proposed system and to better understand the differences in the redispersion behavior. An easily aqueous redispersion of the spray-dried powder composed of maltodextrin and L-leucine (90:10 w/w) was obtained, depending on the particle number density. Their surface area decreased in the presence of LNC. CRM enabled the visualization of the spatial distribution of the different compounds in the powders affording to better understand the influence of the particle number density of the fed sample on their redispersion behavior. This study shows the need for optimizing initial particle number density in the liquid formulation to develop redispersible spray-dried LNC powders.
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Affiliation(s)
- Diego Fontana de Andrade
- a Programa de Pós-Graduação em Ciências Farmacêuticas , Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil
| | - Branko Vukosavljevic
- c Department of Biopharmaceutics and Pharmaceutical Technology , Saarland University , Saarbruecken , Germany.,d Department of Drug Delivery , Helmholtz Centre for Infection Research (HZI) and Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) , Saarbruecken , Germany
| | - Edilson Valmir Benvenutti
- b Departamento de Química Orgânica, Instituto de Química , Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil
| | - Adriana Raffin Pohlmann
- a Programa de Pós-Graduação em Ciências Farmacêuticas , Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil.,b Departamento de Química Orgânica, Instituto de Química , Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil
| | - Sílvia Stanisçuaski Guterres
- a Programa de Pós-Graduação em Ciências Farmacêuticas , Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil
| | - Maike Windbergs
- c Department of Biopharmaceutics and Pharmaceutical Technology , Saarland University , Saarbruecken , Germany.,d Department of Drug Delivery , Helmholtz Centre for Infection Research (HZI) and Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) , Saarbruecken , Germany
| | - Ruy Carlos Ruver Beck
- a Programa de Pós-Graduação em Ciências Farmacêuticas , Universidade Federal do Rio Grande do Sul , Porto Alegre , Rio Grande do Sul , Brazil
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Schöffer JDN, Matte CR, Charqueiro DS, de Menezes EW, Costa TMH, Benvenutti EV, Rodrigues RC, Hertz PF. Directed immobilization of CGTase: The effect of the enzyme orientation on the enzyme activity and its use in packed-bed reactor for continuous production of cyclodextrins. Process Biochem 2017. [DOI: 10.1016/j.procbio.2017.04.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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17
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Schöffer JDN, Matte CR, Charqueiro DS, de Menezes EW, Costa TMH, Benvenutti EV, Rodrigues RC, Hertz PF. Effects of immobilization, pH and reaction time in the modulation of α-, β- or γ-cyclodextrins production by cyclodextrin glycosyltransferase: Batch and continuous process. Carbohydr Polym 2017; 169:41-49. [PMID: 28504163 DOI: 10.1016/j.carbpol.2017.04.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 03/28/2017] [Accepted: 04/03/2017] [Indexed: 12/26/2022]
Abstract
This study reports the immobilization of a β-CGTase on glutaraldehyde pre-activated silica and its use to production of cyclodextrins in batch and continuous reactions. We were able to modulate the cyclodextrin production (α-, β- and γ-CD) by immobilization and changing the reaction conditions. In batch reactions, the immobilized enzyme reached to maximum productions of 4.9mgmL-1 of α-CD, 3.6mgmL-1 of β-CD and 3.5mgmL-1 of γ-CD at different conditions of temperature, pH and reaction time. In continuous reactor, varying the residence time and pH it was possible to produce at pH 4.0 and 141min of residence time preferentially γ-CD (0.75 and 3.36mgmL-1 of α- and γ-CD, respectively), or at pH 8.0 and 4.81min α- and β-CDs (3.44 and 3.51mgmL-1).
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Affiliation(s)
- Jéssie da Natividade Schöffer
- Grupo de Biotecnologia, Bioprocessos e Biocatálise, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Carla Roberta Matte
- Grupo de Biotecnologia, Bioprocessos e Biocatálise, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Douglas Santana Charqueiro
- Laboratório de Sólidos e Superfície, Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Eliana Weber de Menezes
- Laboratório de Sólidos e Superfície, Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Tania Maria Haas Costa
- Laboratório de Sólidos e Superfície, Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Edilson Valmir Benvenutti
- Laboratório de Sólidos e Superfície, Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Rafael C Rodrigues
- Grupo de Biotecnologia, Bioprocessos e Biocatálise, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
| | - Plinho Francisco Hertz
- Grupo de Biotecnologia, Bioprocessos e Biocatálise, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
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Silva TLD, Rambo RS, Rampon DDS, Radatz CS, Benvenutti EV, Russowsky D, Schneider PH. Covalently immobilized indium(III) composite (In/SiO2) as highly efficient reusable catalyst for A3-coupling of aldehydes, alkynes and amines under solvent-free conditions. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.01.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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da Rosa CG, Borges CD, Zambiazi RC, Rutz JK, da Luz SR, Krumreich FD, Benvenutti EV, Nunes MR. Encapsulation of the phenolic compounds of the blackberry (Rubus fruticosus). Lebensm Wiss Technol 2014. [DOI: 10.1016/j.lwt.2014.03.042] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Machado ME, de Menezes EW, Bregles LP, Caramão EB, Benvenutti EV, Zini CA. Palladium(II) chemically bonded to silica surface applied to the separation and identification of polycyclic aromatic sulfur heterocycles in heavy oil. J Sep Sci 2013; 36:1636-43. [DOI: 10.1002/jssc.201200773] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Revised: 02/06/2013] [Accepted: 02/12/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Maria Elisabete Machado
- LAAO - Laboratório de Química Analítica Ambiental e Oleoquímica; UFRGS - Universidade Federal do Rio Grande do Sul; RS Brasil
| | - Eliana Weber de Menezes
- LSS - Laboratório de Sólidos e Superfícies, Instituto de Química; UFRGS - Universidade Federal do Rio Grande do Sul; RS Brasil
| | - Lucas Panizzi Bregles
- LAAO - Laboratório de Química Analítica Ambiental e Oleoquímica; UFRGS - Universidade Federal do Rio Grande do Sul; RS Brasil
| | - Elina Bastos Caramão
- LAAO - Laboratório de Química Analítica Ambiental e Oleoquímica; UFRGS - Universidade Federal do Rio Grande do Sul; RS Brasil
| | - Edilson Valmir Benvenutti
- LSS - Laboratório de Sólidos e Superfícies, Instituto de Química; UFRGS - Universidade Federal do Rio Grande do Sul; RS Brasil
| | - Cláudia Alcaraz Zini
- LAAO - Laboratório de Química Analítica Ambiental e Oleoquímica; UFRGS - Universidade Federal do Rio Grande do Sul; RS Brasil
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Matte CR, Nunes MR, Benvenutti EV, Schöffer JDN, Ayub MAZ, Hertz PF. Characterization of cyclodextrin glycosyltransferase immobilized on silica microspheres via aminopropyltrimethoxysilane as a “spacer arm”. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcatb.2012.01.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Santos FDS, Descalzo RR, Gonçalves PFB, Benvenutti EV, Rodembusch FS. Evidence for excited state intramolecular charge transfer in benzazole-based pseudo-stilbenes. Phys Chem Chem Phys 2012; 14:10994-1001. [DOI: 10.1039/c2cp40870h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Contieri Abad F, Winck PR, Benvenutti EV, do Carmo Ruaro Peralba M, Bastos Caramão E, Alcaraz Zini C. p-Nitro-N-propylaniline/silica: Synthesis, characterization, and its application in matrix solid phase dispersion for multiresidue analysis of pesticides in carrots. J Sep Sci 2007; 30:2109-16. [PMID: 17657829 DOI: 10.1002/jssc.200700065] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A new material for matrix solid phase dispersion (MSPD) was synthesized -- p-nitro-N-propylaniline/silica (pNNPASi) by grafting reactions, characterized by elemental analysis and N(2)-adsorption-desorption isotherms, and tested for multiclass multiresidue analysis of pesticides in wet and freeze-dried carrots. Results obtained applying this new solid phase sorbent to MSPD extraction of ten pesticides (trichlorphon, trifluralin, dicloran, chlorothalonil, prometryn, linuron, captan, procymidone, prochloraz, and deltametrin) in wet carrots showed better results than the ones obtained for freeze-dried samples. Recoveries were in the range of 48-106% and precisions varied from 6 to 20% when wet samples were employed. Comparison between pNNPASi sorbent and C(18) showed better performance of pNNPASi for eight out of ten pesticides tested. The LOQs show that the developed method can be used to detect the pesticides investigated in carrots at concentrations below the maximum residue levels (MRL) established by EU, USEPA, and National Sanitary Surveillance Agency (ANVISA). Linuron, captan, prochloraz, and deltamethrin were found in at least one of the two commercial samples studied in concentrations above the LOQ of this method. Concentrations of the last three pesticides were above the European MRL in one of the commercial samples.
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Affiliation(s)
- Fernanda Contieri Abad
- Laboratório de Química Analítica Ambiental e Oleoquímica, Instituto de Química, UFRGS, Porto Alegre, RS, Brazil
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Cónsul JMD, Peralta CA, Benvenutti EV, Ruiz JA, Pastore HO, Baibich IM. Direct decomposition of nitric oxide on alumina-modified amorphous and mesoporous silica-supported palladium catalysts. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.molcata.2005.10.011] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Pavan FA, Lima IS, Benvenutti EV, Gushikem Y, Airoldi C. Hybrid aniline/silica xerogel cation adsorption and thermodynamics of interaction. J Colloid Interface Sci 2004; 275:386-91. [PMID: 15178263 DOI: 10.1016/j.jcis.2004.03.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2003] [Accepted: 03/04/2004] [Indexed: 10/26/2022]
Abstract
Aniline groups chemically immobilized on silica through the sol-gel process were employed to extract divalent nickel and manganese from aqueous solutions at room temperature. The maximum adsorption capacity of the xerogel was studied from adsorption isotherms using a batch technique. The isotherms obtained were adjusted following the Langmuir equation. The xerogel adsorbent appears to have better affinity for nickel than manganese. From calorimetric titration, thermodynamic data on cation/nitrogen basic atom interaction in the solid/liquid interface were determined. The enthalpic values, -0.46 +/- 0.02 and -.029 +/- 0.02 kJ mol(-1) for nickel and manganese, respectively, are in agreement with the low availability of the basic nitrogen atom on the aniline group and also the possible steric hindrance of the phenyl group bonded to nitrogen. However, thermodynamics indicated the existence of favorable conditions for such cation-nitrogen interactions.
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Affiliation(s)
- F A Pavan
- Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, 13084-971 Campinas, São Paulo, Brazil
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