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Chen L, He X, Pu Y, Wang H, Cao J, Jiang W. Adsorption removal properties of β-cyclodextrin-modified pectin on cholesterol and sodium cholate. Food Chem 2024; 430:137059. [PMID: 37541039 DOI: 10.1016/j.foodchem.2023.137059] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 07/18/2023] [Accepted: 07/28/2023] [Indexed: 08/06/2023]
Abstract
A novel adsorbent β-cyclodextrin-modified pectin was synthesized for removing cholesterol and bile salts from the gastric-intestinal passage. Different amounts of β-cyclodextrin were cross-linked to pectin by aldol condensation reaction via glutaraldehyde. The prepared β-cyclodextrin-modified pectins were successfully confirmed by characterization, showing a higher specific surface area and improved thermal stability with satisfactory cellular compatibility. The introduction of β-cyclodextrins dramatically improved the cholesterol adsorption capacity of pectin due to their hydrophobic cavities. Meanwhile, the modified pectins exhibited superior adsorption for sodium cholate than β-cyclodextrin or pectin itself, which was attributed to hydrophobic interactions. P10:1 displayed the strongest adsorption performance, with a maximum adsorption ability of 44.21 mg/g for cholesterol and 21.38 mg/g for sodium cholate. Furthermore, their adsorption favored the Langmuir isotherm model and pseudosecond-order kinetic model. These results indicate that modified pectin has potential as a nature-based adsorbent for removal of cholesterol and bile salts in the health food industry.
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Affiliation(s)
- Luyao Chen
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China.
| | - Xu He
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China.
| | - Yijing Pu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China.
| | - Hongxuan Wang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China.
| | - Jiankang Cao
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China.
| | - Weibo Jiang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China.
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Chen L, He X, Pu Y, Cao J, Jiang W. Polysaccharide-based biosorbents for cholesterol and bile salts in gastric-intestinal passage: Advances and future trends. Compr Rev Food Sci Food Saf 2023; 22:3790-3813. [PMID: 37548601 DOI: 10.1111/1541-4337.13214] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 06/25/2023] [Accepted: 07/06/2023] [Indexed: 08/08/2023]
Abstract
Cholesterol is one of the hazard elements for many cardiovascular diseases, but many cholesterol-lowering drugs are expensive and unhealthy. Therefore, it is necessary to develop edible and safe biosorbents to reduce excess cholesterol and bile salts in the gastric-intestinal passage. Polysaccharide-based biosorbents offer a feasible strategy for decreasing them. This review summarized polysaccharide-based biosorbents that have been developed for adsorbing cholesterol and bile salts from the gastric-intestinal passage and analyzed common modification methods for these adsorbents. Finally, the adsorption models were also elucidated. Polysaccharides, including β-cyclodextrin, pectin, chitin/chitosan, dietary fiber extract, and cellulose, have been proposed for adsorbing cholesterol and bile salts in the gastric-intestinal passage as biosorbents. This is mainly due to the retention of pores, the capture of the viscosity network, and the help of hydrophobic interactions. In spite of this, the adsorption capacity of polysaccharides is still limited. Therefore, the modifications for them became the most popular areas in the recent studies of in vitro cholesterol adsorption. Chemical approaches namely grafting, (1) acetylation, (2) hydroxypropylation, (3) carboxymethylation, and (4) amination are considered to modify the polysaccharides for higher adsorption ability. Moreover, ultrasonic/microwave/pressure treatment and micron technology (microfluidization, micronization, and ball milling) are effective physical modification methods, while the biological approach mainly refers to enzymatic hydrolysis and microbial fermentation. The adsorption models are generally explained by two adsorption isotherms and two adsorption kinetics. In sum, it is reckoned that further food applications will follow soon.
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Affiliation(s)
- Luyao Chen
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Xu He
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Yijing Pu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Jiankang Cao
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Weibo Jiang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
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Novel Polymeric Nanomaterial Based on Poly(Hydroxyethyl Methacrylate-Methacryloylamidophenylalanine) for Hypertension Treatment: Properties and Drug Release Characteristics. Polymers (Basel) 2022; 14:polym14225038. [PMID: 36433166 PMCID: PMC9693067 DOI: 10.3390/polym14225038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/14/2022] [Accepted: 11/15/2022] [Indexed: 11/22/2022] Open
Abstract
In this study, a novel polymeric nanomaterial was synthesized and characterized, and it its potential usability in hypertension treatment was demonstrated. For these purposes, a poly(hydroxyethyl methacrylate-methacryloylamidophenylalanine)-based polymeric nanomaterial (p(HEMPA)) was synthesized using a mini-emulsion polymerization technique. The nanomaterials were characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and zeta size analysis. The synthesized p(HEMPA) nanomaterial had a diameter of about 113 nm. Amlodipine-binding studies were optimized by changing the reaction conditions. Under optimum conditions, amlodipine's maximum adsorption value (Qmax) of the p(HEMPA) nanopolymer was found to be 145.8 mg/g. In vitro controlled drug release rates of amlodipine, bound to the nanopolymer at the optimum conditions, were studied with the dialysis method in a simulated gastrointestinal system with pH values of 1.2, 6.8 and 7.4. It was found that 99.5% of amlodipine loaded on the nanomaterial was released at pH 7.4 and 72 h. Even after 72 h, no difference was observed in the release of AML. It can be said that the synthesized nanomaterial is suitable for oral amlodipine release. In conclusion, the synthesized nanomaterial was studied for the first time in the literature as a drug delivery system for use in the treatment of hypertension. In addition, AML-p(HEMPA) nanomaterials may enable less frequent drug uptake, have higher bioavailability, and allow for prolonged release with minimal side effects.
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A New Electrocatalytic System Based on Copper (II) Chloride and Magnetic Molecularly Imprinted Polymer Nanoparticles in 3D Printed Microfluidic Flow Cell for Enzymeless and Low-Potential Cholesterol Detection. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116853] [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]
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Feyzioğlu Demir E, Akgöl S. Synthesis and characterization of double molecular imprinted nanoparticles and investigation to adsorption of respiratory drugs. POLYM-PLAST TECH MAT 2022. [DOI: 10.1080/25740881.2021.1991949] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Esra Feyzioğlu Demir
- Department of Medical Laboratory Techniques, Vocational School of Health Services, Izmir University of Economics, Izmir, Turkey
| | - Sinan Akgöl
- Department of Biochemistry, Faculty of Science, Ege University, Izmir, Turkey
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6
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Preparation of a 99mTc-labeled graft polymer and its in vitro and in vivo evaluation. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07817-6] [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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Öztürk S, Demir N. Development of a novel IMAC sorbent for the identification of melamine in dairy products by HPLC. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2021.103931] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Pectin/lignocellulose nanofibers/chitin nanofibers bionanocomposite as an efficient biosorbent of cholesterol and bile salts. Carbohydr Polym 2021; 261:117883. [PMID: 33766370 DOI: 10.1016/j.carbpol.2021.117883] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 02/24/2021] [Accepted: 02/26/2021] [Indexed: 11/23/2022]
Abstract
A new biosorbent Ca-crosslinked pectin/lignocellulose nanofibers/chitin nanofibers (PLCN) was synthesized for cholesterol and bile salts adsorption from simulated intestinal fluid during gastric-intestinal passage. The physico-chemical properties of PLCN were studied using SEM, FTIR, XRD, DSC and BET. Before gastrointestinal passage, PLCN had an amorphous single-phase, compact structure formed via hydrogen and van der Waals bonds that revealed an irregular shape with the shriveled surface but watery condition and enzymatic digestion led to create a porous structure without destruction because of the water-insoluble nanofibers, therefore increasing the adsorption capacity. The maximum adsorption capacity reached 37.9 and 5578.4 mg/g for cholesterol and bile salts, respectively. Freundlich isotherm model indicated the reversible heterogeneous adsorption of both cholesterol and bile salts on PLCN. Further, their adsorption followed pseudo-second order kinetic model. These results suggest that PLCN has potential as a gastrointestinal-resistant biosorbent for cholesterol and bile salts adsorption applicable in medicine and food industry.
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Core-Shell Molecularly Imprinted Polymers on Magnetic Yeast for the Removal of Sulfamethoxazole from Water. Polymers (Basel) 2020; 12:polym12061385. [PMID: 32575714 PMCID: PMC7362263 DOI: 10.3390/polym12061385] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/16/2020] [Accepted: 06/17/2020] [Indexed: 02/07/2023] Open
Abstract
In this work, magnetic yeast (MY) was produced through an in situ one-step method. Then, MY was used as the core and the antibiotic sulfamethoxazole (SMX) as the template to produce highly selective magnetic yeast-molecularly imprinted polymers (MY@MIPs). The physicochemical properties of MY@MIPs were assessed by Fourier-transform infrared spectroscopy (FT-IR), a vibrating sample magnetometer (VSM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), specific surface area (SBET) determination, and scanning electron microscopy (SEM). Batch adsorption experiments were carried out to compare MY@MIPs with MY and MY@NIPs (magnetic yeast-molecularly imprinted polymers without template), with MY@MIPs showing a better performance in the removal of SMX from water. Adsorption of SMX onto MY@MIPs was described by the pseudo-second-order kinetic model and the Langmuir isotherm, with maximum adsorption capacities of 77 and 24 mg g-1 from ultrapure and wastewater, respectively. Furthermore, MY@MIPs displayed a highly selective adsorption toward SMX in the presence of other pharmaceuticals, namely diclofenac (DCF) and carbamazepine (CBZ). Finally, regeneration experiments showed that SMX adsorption decreased 21 and 34% after the first and second regeneration cycles, respectively. This work demonstrates that MY@MIPs are promising sorbent materials for the selective removal of SMX from wastewater.
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Kartal F, Denizli A. Molecularly imprinted cryogel beads for cholesterol removal from milk samples. Colloids Surf B Biointerfaces 2020; 190:110860. [DOI: 10.1016/j.colsurfb.2020.110860] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 01/21/2020] [Accepted: 02/10/2020] [Indexed: 01/06/2023]
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Kuru CI, Ulucan F, Kuşat K, Akgöl S. A model study by using polymeric molecular imprinting nanomaterials for removal of penicillin G. ENVIRONMENTAL MONITORING AND ASSESSMENT 2020; 192:367. [PMID: 32415329 DOI: 10.1007/s10661-020-08294-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 04/14/2020] [Indexed: 06/11/2023]
Abstract
We aimed to develop a molecularly imprinted polymeric systems with using penicillin G as a template molecule for removal of the antibiotic residues from environmental samples. Firstly, Pen-G-imprinted poly (2-hydroxyethyl methacrylate-N-methacryloyl-L-alanine) [p(HEMA-MAAL)] nanopolymers were synthesized by surfactant-free emulsion polymerization method. Then, template molecule (Pen-G) was extracted from nanopolymers. Synthesized nanopolymers were characterized by different methods such as Fourier-transform infrared spectroscopy (FTIR), elemental and zeta-size analysis, scanning electron microscope (SEM), and surface area calculations. Nanopolymers have 60.38 nm average size and 1034.22 m2/g specific surface area. System parameters on Pen-G adsorption onto Pen-G imprint nanopolymers were investigated at different conditions. The specific adsorption value (Qmax) of molecularly impirinted p(HEMA-MAAL) nanopolymers was found 71.91 g/g for Pen-G in 5 mg/mL Pen-G initial concentration. Pen-G adsorption of molecularly imprinted nanopolymers was 15 times more than non-imprinted polymer. It is shown that obtained p(HEMA-MAAL) nanopolymer was a reuseable product which protected its adsorption capacity of 98.9% after 5th adsorption-desorption cycle. In conclusion, we suggest a method to develop a nanostructure, selective, low-cost molecularly imprinted polymeric systems with using penicillin G as a template molecule for removal of the antibiotic residues.
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Affiliation(s)
- Cansu Ilke Kuru
- Department of Biochemistry, Ege University Faculty of Science, Izmir, Turkey
| | - Fulden Ulucan
- Department of Biochemistry, Ege University Faculty of Science, Izmir, Turkey
| | - Kevser Kuşat
- Turkish Health of Ministry, Turkish Medicines and Medical Devices Agency, Ankara, Turkey
| | - Sinan Akgöl
- Department of Biochemistry, Ege University Faculty of Science, Izmir, Turkey.
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Saylan Y, Denizli A. Advances in Molecularly Imprinted Systems: Materials, Characterization Methods and Analytical Applications. CURR ANAL CHEM 2020. [DOI: 10.2174/1573411015666181214155042] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Introduction:
A molecular imprinting is one of the fascinating modification methods that
employ molecules as targets to create geometric cavities for recognition of targets in the polymeric
matrix. This method provides a broad versatility to imprint target molecules with different size,
three-dimensional structure and physicochemical features. In contrast to the complex and timeconsuming
laboratory surface modification procedures, this method offers a rapid, sensitive,
inexpensive, easy-to-use, and selective approach for the diagnosis, screening and monitoring
disorders. Owing to their unique features such as high selectivity, physical and chemical robustness,
high stability, low-cost and reusability of this method, molecularly imprinted polymers have become
very attractive materials and been applied in various applications from separation to detection.
Background:
The aims of this review are structured according to the fundamentals of molecularly
imprinted polymers involving essential elements, preparation procedures and also the analytical
applications platforms. Finally, the future perspectives to increase the development of molecularly
imprinted platforms.
Methods:
A molecular imprinting is one of the commonly used modification methods that apply
target as a recognition element itself and provide a wide range of versatility to replica other targets
with a different structure, size, and physicochemical features. A rapid, easy, cheap and specific
recognition approach has become one of the investigation areas on, especially biochemistry,
biomedicine and biotechnology. In recent years, several technologies of molecular imprinting method
have gained prompt development according to continuous use and improvement of traditional
polymerization techniques.
Results:
The molecularly imprinted polymers with excellent performances have been prepared and
also more exciting and universal applications have been recognized. In contrast to the conventional
methods, the imprinted systems have superior advantages including high stability, relative ease and
low cost of preparation, resistance to elevated temperature, and pressure and potential application to
various target molecules. In view of these considerations, molecularly imprinted systems have found
application in various fields of analytical chemistry including separation, purification, detection and
spectrophotometric systems.
Conclusion:
Recent analytical methods are reported to develop the binding kinetics of imprinted
systems by using the development of other technologies. The combined platforms are among the
most encouraging systems to detect and recognize several molecules. The diversity of molecular
imprinting methods was overviewed for different analytical application platforms. There is still a
requirement of more knowledge on the molecular features of these polymers. A next step would
further be the optimization of different systems with more homogeneous and easily reachable
recognition sites to reduce the laborious in the accessibility in the three-dimensional polymeric
materials in sufficient recognition features and also better selectivity and sensitivity for a wide range
of molecules.
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Affiliation(s)
- Yeşeren Saylan
- Department of Chemistry, Hacettepe University, 06800, Ankara, Turkey
| | - Adil Denizli
- Department of Chemistry, Hacettepe University, 06800, Ankara, Turkey
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Yilmaz E, Şenel E, Ok S. Cholesterol removal by selected metal-organic frameworks as adsorbents. Journal of Food Science and Technology 2019; 57:173-181. [PMID: 31975720 DOI: 10.1007/s13197-019-04045-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 07/26/2019] [Accepted: 08/19/2019] [Indexed: 10/26/2022]
Abstract
The aim of this study was to investigate the cholesterol removal capacity of seven metal-organic frameworks (MOF) and to compare with active carbon as adsorbents, and with aqueous β-cyclodextrine complexation removal technique. There were slight color differences in the oil samples after the treatments. The lowest free fatty acidities (0.13% and 0.13% linoleic acid) and peroxide values (21.07 and 23.50 meqO2/kg) were measured in aluminum-MOF (Al-MOF) and titanium-MOF (Ti-MOF) treated samples when compared to control sample (0.15%, and 27.62 meqO2/kg). Cholesterol reduction ratios of the Al-MOF treated sample (27.45%) and Ti-MOF treated sample (26.27%) were higher among all adsorbent treatments, but lower than that of the β-cyclodextrine aqueous complexation technique (33.07%). Further experiments with Al-MOF and Ti-MOF showed that when adsorbent addition level increased to 3.0%, removed cholesterol content increased. Likewise, when treatment times extended to 180 min, more cholesterol was removed. But, the removed cholesterol contents at 100 °C and 30 °C treatment temperatures were lower than that of at 50 °C treatment temperature. Further experiments with butter and sheep tail tallow showed that Al-MOF was quite effective as an adsorbent to remove cholesterol. This study proves the great potential of MOF to remove cholesterol selectively from oil/fat by adsorption principle.
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Affiliation(s)
- Emin Yilmaz
- Department of Food Engineering, Faculty of Engineering, Çanakkale Onsekiz Mart University, 17020 Çanakkale, Turkey
| | - Ezgi Şenel
- Department of Food Engineering, Faculty of Engineering, Çanakkale Onsekiz Mart University, 17020 Çanakkale, Turkey
| | - Selçuk Ok
- Department of Food Engineering, Faculty of Engineering, Çanakkale Onsekiz Mart University, 17020 Çanakkale, Turkey
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Kamarudin SF, Ahmad MN, Mohamed Dzahir IH, Ishak N, Ab Halim NF. Development of quercetin imprinted membranes-based PVDF substrate. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-018-2604-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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15
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Solid phase extraction technique as a general field of application of molecularly imprinted polymer materials. COMPREHENSIVE ANALYTICAL CHEMISTRY 2019. [DOI: 10.1016/bs.coac.2019.05.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Macroporous monolithic columns modified with cholesterol-containing glycopolymer for cholesterol solid-phase extraction. MENDELEEV COMMUNICATIONS 2018. [DOI: 10.1016/j.mencom.2018.05.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Kılıç G, Osman B, Tüzmen N. Application of affinity microspheres for effective SPE cleanup before the determination of sulfamerazine by HPLC. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 91:55-63. [PMID: 30033286 DOI: 10.1016/j.msec.2018.04.058] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 04/19/2018] [Indexed: 12/14/2022]
Abstract
This paper describes the application of poly (ethylene glycol dimethacrylate-N-methacryloyl-L-tryptophane methyl ester) [p(EGDMA-MATrp)] microspheres as an affinity sorbent for the SPE (solid phase extraction) cleanup of sulfamerazine (SMR) from food samples of animal origin before high performance liquid chromatography (HPLC) analysis. The microspheres were prepared by suspension polymerization of ethylene glycol dimethacrylate (EGDMA) and N-methacryloyl-L-tryptophane methyl ester (MATrp) as a crosslinker and a monomer, respectively. Various parameters affecting the SPE cleanup efficiency of the p(EGDMA-MATrp) microspheres (contact time, pH, initial SMR concentration, ionic strength etc.) were optimized. Under the optimized conditions, maximum adsorption capacity was found to be 8.55 ± 0.44 mg/g sorbent at pH 5.0. 90% of the adsorbed SMR was desorbed by using ACN:MeOH (5:5) mixture as a desorption agent. Applicability of the microspheres for the SPE cleanup of SMR residues in the food samples such as egg and milk with HPLC was also determined. It was demonstrated that the prepared p(EGDMA-MATrp) microspheres could be repeatedly applied for SPE cleanup of sulfamerazine before chromatographic analysis. Also, the recoveries of SMR in milk and egg samples were reasonably satisfactory and in the range of 71 to 90%.
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Affiliation(s)
- Gözde Kılıç
- Graduate School of Natural and Applied Sciences, Dokuz Eylül Univ., İzmir, Turkey
| | - Bilgen Osman
- Chemistry Department, Uludag University, Bursa, Turkey
| | - Nalan Tüzmen
- Chemistry Department, Dokuz Eylül University, İzmir, Turkey.
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Synthesis and characterization of Ag+-decorated poly(glycidyl methacrylate) microparticle design for the adsorption of nucleic acids. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1081-1082:1-7. [DOI: 10.1016/j.jchromb.2018.02.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 02/05/2018] [Accepted: 02/15/2018] [Indexed: 11/18/2022]
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Odabaşı M, Uzun L, Baydemir G, Aksoy NH, Acet Ö, Erdönmez D. Cholesterol imprinted composite membranes for selective cholesterol recognition from intestinal mimicking solution. Colloids Surf B Biointerfaces 2018; 163:266-274. [DOI: 10.1016/j.colsurfb.2017.12.033] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 12/11/2017] [Accepted: 12/18/2017] [Indexed: 12/11/2022]
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20
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Isolation of Aspartic Acid Using Novel Poly(2-hydroxyethyl methacrylate-N-methacryloyl-(l)-lysine) Cryogels. Chromatographia 2017. [DOI: 10.1007/s10337-017-3419-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Stepanova MА, Kinziabulatova LR, Nikitina AA, Korzhikova-Vlakh EG, Tennikova TB. Cholesterol-imprinted macroporous monoliths: Preparation and characterization. Electrophoresis 2017; 38:2965-2974. [PMID: 28881397 DOI: 10.1002/elps.201700335] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 09/02/2017] [Accepted: 09/03/2017] [Indexed: 11/08/2022]
Abstract
The development of sorbents for selective binding of cholesterol, which is a risk factor for cardiovascular disease, has a great importance for analytical science and medicine. In this work, two series of macroporous cholesterol-imprinted monolithic sorbents differing in the composition of functional monomers (methacrylic acid, butyl methacrylate, 2-hydroxyethyl methacrylate and ethylene dimethacrylate), amount of a template (4, 6 and 8 mol%) used for molecular imprinting, as well as mean pore size were synthesized by in situ free-radical process in stainless steel housing of 50 mm × 4.6 mm i.d. All prepared materials were characterized regarding to their hydrodynamic permeability and porous properties, as well as examined by BET and SEM methods. Imprinting factors, apparent dynamic dissociation constants, the maximum binding capacity, the number of theoretical plates and the height equivalent to a theoretical palate of MIP monoliths at different mobile phase flow rates were determined. The separation of a mixture of structural analogues, namely, cholesterol and prednisolone, was demonstrated. Additionally, the possibility of using the developed monoliths for cholesterol solid-phase extraction from simulated biological solution was shown.
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Affiliation(s)
- Mariia А Stepanova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, St. Petersburg, Russia.,Institute of Chemistry, Saint-Petersburg State University, St. Petersburg, Russia
| | | | - Anna A Nikitina
- Institute of Macromolecular Compounds, Russian Academy of Sciences, St. Petersburg, Russia
| | | | - Tatiana B Tennikova
- Institute of Chemistry, Saint-Petersburg State University, St. Petersburg, Russia
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Capacitive Biosensors and Molecularly Imprinted Electrodes. SENSORS 2017; 17:s17020390. [PMID: 28218689 PMCID: PMC5336051 DOI: 10.3390/s17020390] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 01/16/2017] [Accepted: 02/08/2017] [Indexed: 01/05/2023]
Abstract
Capacitive biosensors belong to the group of affinity biosensors that operate by registering direct binding between the sensor surface and the target molecule. This type of biosensors measures the changes in dielectric properties and/or thickness of the dielectric layer at the electrolyte/electrode interface. Capacitive biosensors have so far been successfully used for detection of proteins, nucleotides, heavy metals, saccharides, small organic molecules and microbial cells. In recent years, the microcontact imprinting method has been used to create very sensitive and selective biorecognition cavities on surfaces of capacitive electrodes. This chapter summarizes the principle and different applications of capacitive biosensors with an emphasis on microcontact imprinting method with its recent capacitive biosensor applications.
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