Synthesis of magnetic framework composites for the discrimination of Escherichia coli at the strain level

Wei, Jiping; Qiao, Bin; Song, Wenjun; Chen, Tao; li, Fei; Li, Bo-Zhi; Wang, Jin; Han, Ye Hong; Huang, Yan-Feng; Zhou, Zhijiang

doi:10.1016/j.aca.2015.02.018

Cited by 23 publications

(4 citation statements)

References 38 publications

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“…Therefore, the combination between (1) a new class of materials (MOFs) that provides little diffusion limitation, excellent chemical and thermal stability, tunable porosity and a large surface area, (2) magnetic nanoparticles (Fe 3 O 4 ) that provide magnetic separation, and (3) a laccase enzyme that has the ability to oxidize organic molecules and dyes can provide a promising material for water treatment. The covalent linkage between the MOFs and the biomolecules can be reached using functional groups as reported in the literature [24,25]. Laccase enzyme immobilization can be successfully reached via the introduction of functional groups to the MOFs [26,27].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Metal Organic Framework Immobilized Laccase for Wastewater Decolorization

et al. 2021

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The laccase enzyme was successfully immobilized over a magnetic amino-functionalized metal–organic framework Fe3O4-NH2@MIL-101(Cr). Different techniques were used for the characterization of the synthesized materials. The Fe3O4-NH2@MIL-101(Cr) laccase showed excellent resistance to high temperatures and low pH levels with a high immobilization capacity and large activity recovery, due to the combination of covalent binding and adsorption advantages. The long-term storage of immobilized laccase for 28 days indicated a retention of 88% of its initial activity, due to the high stability of the immobilized system. Furthermore, a residual activity of 49% was observed at 85 °C. The immobilized laccase was effectively used for the biodegradation of Reactive Black 5 (RB) and Alizarin Red S (AR) dyes in water. The factors affecting the RB and AR degradation using the immobilized laccase (dye concentration, temperature and pH) were investigated to determine the optimum treatment conditions. The optimum conditions for dye removal were a 5 mg/L dye concentration, temperature of 25 °C, and a pH of 4. At the optimum conditions, the biodegradation and sorption-synergistic mechanism of the Fe3O4-NH2@MIL-101(Cr) laccase system caused the total removal of AR and 81% of the RB. Interestingly, the reusability study of this immobilized enzyme up to five cycles indicated the ability to reuse it several times for water treatment.

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Section: Introductionmentioning

confidence: 99%

Magnetic Metal Organic Framework Immobilized Laccase for Wastewater Decolorization

et al. 2021

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“…The fungicides with highly delocalized π electrons allow π–π interaction with the BDC or NH 2 ‐BDC molecules in the magnetic iron(III)‐based framework composites and make main contributions to the extraction. At the same time, hydrophobic interaction between the fungicides and the hydrophobic MOF is also beneficial for high adsorption . Compared to MIL‐53‐NH 2 @Fe 3 O 4 ‐COOH and MIL‐53@Fe 3 O 4 ‐COOH, MIL‐101‐NH 2 @Fe 3 O 4 ‐COOH and MIL‐101@Fe 3 O 4 ‐COOH show the higher extracting efficiency maybe because the latter have large pore (29 Å and 34 Å) and the window (12 Å and 16 Å × 14.5 Å) and the fungicides can more easily enter their pores.…”

Section: Resultsmentioning

confidence: 99%

“…The fungicides with highly delocalized π electrons allow π-π interaction with the BDC or NH 2 -BDC molecules in the magnetic iron(III)-based framework composites and make main contributions to the extraction. At the same time, hydrophobic interaction between the fungicides and the hydrophobic MOF is also beneficial for high adsorption [33]. Compared to MIL-53-NH 2 @Fe 3 O 4 -COOH and MIL-53@Fe 3…”

Section: Adsorption Characteristics Of the Magnetic Iron(iii)-based Fmentioning

confidence: 99%

Magnetic iron(III)‐based framework composites for the magnetic solid‐phase extraction of fungicides from environmental water samples

Huang

Liu

et al. 2018

J of Separation Science

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We adopted a facile hydrofluoric acid-free hydro-/solvothermal method for the preparation of four magnetic iron(III)-based framework composites (MIL-101@Fe O -COOH, MIL-101-NH @Fe O -COOH, MIL-53@Fe O -COOH, and MIL-53-NH @Fe O -COOH). The obtained four magnetic iron(III)-based framework composites were applied to magnetic separation and enrichment of the fungicides (prochloraz, myclobutanil, tebuconazole, and iprodione) from environmental samples before high-performance liquid chromatographic analysis. MIL-101-NH @Fe O -COOH showed more remarkable pre-concentration ability for the fungicides as compared to the other three magnetic iron(III)-based framework composites. The extraction parameters affecting enrichment efficiency including extraction time, sample pH, elution time, and the desorption solvent were investigated and optimized. Under the optimized conditions, the standard curve of correlation coefficients were all above 0.991, the limits of detection were 0.04-0.4 μg/L, and the relative standard deviations were below 10.2%. The recoveries of two real water samples ranged from 71.1-99.1% at the low spiking level (30 μg/L). Therefore, the MIL-101-NH @Fe O -COOH composites are attractive for the rapid and efficient extraction of fungicides from environmental water samples.

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“…This novel method not only provides a robust and fast sample analysis with a portable and easy-to-use device but also shows sensitivities competitive with gold standard measurement methods such as ELISA. Magnetic nanoparticles (MNPs) have shown to be a very versatile tool for diagnostic and therapeutic purposes in different medical fields (Baumann et al 2005 ; Friedrich et al 2022a ; Friedrich et al 2022b ; Kappes et al 2022 ; Kluchova et al 2009 ; Mühlberger et al 2019 ; Wei et al 2015 ). COMPASS uses the magnetization response of functionalized MNP ensembles on time-varying (AC magnetic fields) and specific offset magnetic fields (DC or offset magnetic fields) to determine specific information about MNP mobility in their environment and thus the conjugations of chemical or biological compounds on their surface.…”

Section: Introductionmentioning

confidence: 99%

Detection of viral antibodies in camel sera using magnetic particle spectroscopy

Friedrich

Vogel

Rückert

et al. 2023

Appl Microbiol Biotechnol

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Pandemics like SARS-Cov-2 very frequently have their origin in different animals and in particular herds of camels could be a source of zoonotic diseases. This study took advantage on a highly sensitive and adaptable method for the fast and reliable detection of viral antibodies in camels using low-cost equipment. Magnetic nanoparticles (MNP) have high variability in their functionalization with different peptides and proteins. We confirm that 3-aminopropyl triethoxysilane (APTES)-coated MNP could be functionalized with viral proteins. The protein loading could be confirmed by simple loading controls using FACS-analysis (p < 0.05). Complementary combination of antigen and antibody yields in a significant signal increase could be proven by both FACS and COMPASS. However, COMPASS needs only a few seconds for the measurement. In COMPASS, the phase φn on selected critical point of the fifth higher harmonic (n = 5th). Here, positive sera display highly significant signal increase over the control or negative sera. Furthermore, a clear distinction could be made in antibody detection as an immune response to closely related viruses (SARS-CoV2 and MERS). Using modified MNPs along with COMPASS offers a fast and reliable method that is less cost intensive than current technologies and offers the possibility to be quickly adapted in case of new occurring viral infections. Key points • COMPASS (critical offset magnetic particle spectroscopy) allows the fast detection of antibodies. • Magnetic nanoparticles can be adapted by exchange of the linked bait molecule. • Antibodies could be detected in camel sera without washing steps within seconds.

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Synthesis of magnetic framework composites for the discrimination of Escherichia coli at the strain level

Cited by 23 publications

References 38 publications

Magnetic Metal Organic Framework Immobilized Laccase for Wastewater Decolorization

Magnetic Metal Organic Framework Immobilized Laccase for Wastewater Decolorization

Magnetic iron(III)‐based framework composites for the magnetic solid‐phase extraction of fungicides from environmental water samples

Detection of viral antibodies in camel sera using magnetic particle spectroscopy

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