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García-Guzmán JJ, Sainz-Calvo ÁJ, Sierra-Padilla A, Bellido-Milla D, Cubillana-Aguilera L, Palacios-Santander JM. Simple and cost-effective pH and T sensors from top to bottom: New chemical probes based on sonogel-carbon transducers for plasma analyses. Talanta 2024; 270:125603. [PMID: 38194860 DOI: 10.1016/j.talanta.2023.125603] [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: 10/17/2023] [Revised: 12/22/2023] [Accepted: 12/24/2023] [Indexed: 01/11/2024]
Abstract
The present work introduces two novel approaches to fabricate simple and cost-effective pH and temperature probes. Sinusoidal voltage methodologies were employed to electrodeposit polyaniline (PANI) at different growth times (10-20 min) on the surface of an affordable Sonogel-Carbon electrode to conform a robust pH sensor. The presence of PANI and its phases were corroborated by electrochemical means. The sensibility, reversibility and selectivity of the produced sensor were very adequate to apply it in physiological samples. In this regard, the proposed sensor was evaluated in artificial blood serum as well as untreated plasma samples obtaining outstanding results in comparison with a gold reference technique (error <2 %). In addition, a new composite sonogel material, intrinsically modified with multiwalled carbon nanotubes, was attached on top of an electrode couple to one-step fabricate a new temperature probe, relating resistance of the probe with the surroundings temperature. In this case, an optical microscopy characterization was performed to study the sturdiness of the layer. Remarkably, suitable results in terms of sensitivity and selectivity were obtained. The probes were assessed in artificial and untreated plasma samples as well, with the corresponding validation step (error <1 %) by using a commercial temperature probe.
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Affiliation(s)
- Juan José García-Guzmán
- Institute of Research on Electron Microscopy and Materials (IMEYMAT), Department of Analytical Chemistry, Faculty of Sciences, Campus de Excelencia Internacional del Mar (CEIMAR), University of Cadiz, Campus Universitario de Puerto Real, Polígono del Río San Pedro S/N, 11510, Puerto Real, Cádiz, Spain.
| | - Álvaro Jesús Sainz-Calvo
- Institute of Research on Electron Microscopy and Materials (IMEYMAT), Department of Analytical Chemistry, Faculty of Sciences, Campus de Excelencia Internacional del Mar (CEIMAR), University of Cadiz, Campus Universitario de Puerto Real, Polígono del Río San Pedro S/N, 11510, Puerto Real, Cádiz, Spain
| | - Alfonso Sierra-Padilla
- Institute of Research on Electron Microscopy and Materials (IMEYMAT), Department of Analytical Chemistry, Faculty of Sciences, Campus de Excelencia Internacional del Mar (CEIMAR), University of Cadiz, Campus Universitario de Puerto Real, Polígono del Río San Pedro S/N, 11510, Puerto Real, Cádiz, Spain
| | - Dolores Bellido-Milla
- Institute of Research on Electron Microscopy and Materials (IMEYMAT), Department of Analytical Chemistry, Faculty of Sciences, Campus de Excelencia Internacional del Mar (CEIMAR), University of Cadiz, Campus Universitario de Puerto Real, Polígono del Río San Pedro S/N, 11510, Puerto Real, Cádiz, Spain
| | - Laura Cubillana-Aguilera
- Institute of Research on Electron Microscopy and Materials (IMEYMAT), Department of Analytical Chemistry, Faculty of Sciences, Campus de Excelencia Internacional del Mar (CEIMAR), University of Cadiz, Campus Universitario de Puerto Real, Polígono del Río San Pedro S/N, 11510, Puerto Real, Cádiz, Spain.
| | - José María Palacios-Santander
- Institute of Research on Electron Microscopy and Materials (IMEYMAT), Department of Analytical Chemistry, Faculty of Sciences, Campus de Excelencia Internacional del Mar (CEIMAR), University of Cadiz, Campus Universitario de Puerto Real, Polígono del Río San Pedro S/N, 11510, Puerto Real, Cádiz, Spain
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Gurgel D, Vieira YA, Henriques RO, Machado R, Oechsler BF, Junior AF, de Oliveira D. A Comprehensive Review on Core‐Shell Polymeric Particles for Enzyme Immobilization. ChemistrySelect 2022. [DOI: 10.1002/slct.202202285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Danyelle Gurgel
- Department of Chemical Engineering and Food Engineering Federal University of Santa Catarina, EQA/UFSC - P.O. Box 476, Zip Code 88040-900 Florianopolis SC Brazil
| | - Yago Araujo Vieira
- Department of Chemical Engineering and Food Engineering Federal University of Santa Catarina, EQA/UFSC - P.O. Box 476, Zip Code 88040-900 Florianopolis SC Brazil
| | - Rosana Oliveira Henriques
- Department of Chemical Engineering and Food Engineering Federal University of Santa Catarina, EQA/UFSC - P.O. Box 476, Zip Code 88040-900 Florianopolis SC Brazil
| | - Ricardo Machado
- Department of Chemical Engineering and Food Engineering Federal University of Santa Catarina, EQA/UFSC - P.O. Box 476, Zip Code 88040-900 Florianopolis SC Brazil
| | - Bruno Francisco Oechsler
- Department of Chemical Engineering and Food Engineering Federal University of Santa Catarina, EQA/UFSC - P.O. Box 476, Zip Code 88040-900 Florianopolis SC Brazil
| | - Agenor Furigo Junior
- Department of Chemical Engineering and Food Engineering Federal University of Santa Catarina, EQA/UFSC - P.O. Box 476, Zip Code 88040-900 Florianopolis SC Brazil
| | - Débora de Oliveira
- Department of Chemical Engineering and Food Engineering Federal University of Santa Catarina, EQA/UFSC - P.O. Box 476, Zip Code 88040-900 Florianopolis SC Brazil
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YILDIRIM A, İSPİRLİ DOĞAÇ Y. An application of CoFe2O4/alginate magnetic beads: drug delivery system of 5-fluorouracil. INTERNATIONAL JOURNAL OF SECONDARY METABOLITE 2022. [DOI: 10.21448/ijsm.1052662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Magnetic hyperthermia therapy is expected to play an important role in the treatment of more and more cancers. The synergistic effects of using together hyperthermia and cancer drugs have been shown by literature studies to be more effective than either hyperthermia treatment alone or chemotherapy alone. In addition, magnetic materials that can be used as a contrast agent enable magnetic resonance imaging of the tumor, which is also useful in seeing the treatment progress. This study, which was designed for this purpose, occurred in three parts: In the first part, magnetic CoFe2O4/alginate composite beads were prepared and characterized with thermogravimetric analysis (TGA) and scanning electron microscope (SEM). In the second part, the swelling behaviour of magnetic composite beads was investigated at pH 1.2, pH 7.4 and pH 6.8. It was seen that at pH 7.4 and pH 6.8, that is, near neutral pH, CFA swelled by 81.54% and 82.69%, respectively. In the third part, 5-Fluorouracil was encapsulated at the different ratios in CoFe2O4/alginate composite beads, and release experiments were performed at pH 1.2, pH 7.4 and pH 6.8. 5-FU release was calculated with Korsmeyer-Peppas, Higuchi, first-order, and zero-order models. It was seen that the drug release systems prepared were suitable for all kinetic models. Magnetic CoFe2O4/alginate composite bead, which is the drug carrier, was determined to be suitable for controlled release for 5-Fluorouracil.
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Almaghrabi O, Almulaiky YQ. A biocatalytic system obtained via immobilization of urease onto magnetic metal/alginate nanocomposite: Improving reusability and enhancing stability. BIOCATAL BIOTRANSFOR 2022. [DOI: 10.1080/10242422.2022.2082871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Omar Almaghrabi
- Department of Biology, College of Science, University of Jeddah, Jeddah, Saudi Arabia
| | - Yaaser Q. Almulaiky
- Department of Chemistry, College of Science and Arts at Khulis, University of Jeddah, Jeddah, Saudi Arabia
- Chemistry Department, Faculty of Applied Science, Taiz University, Taiz, Yemen
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