Deoxynivalenol (DON) and zearalenone (ZEN) pose a serious threat to human health, and have been frequently detected in the aqueous environment. To protect consumers from the harm of mycotoxins, a ...nanozyme-mediated multiplexed lateral flow immunoassay (LFIA) integrated with a smartphone was developed for rapid, highly sensitive and simultaneous quantitative detection of DON and ZEN in the aqueous environment. Highly efficient peroxidase mimicking core-shell Au@Pt nanozymes were synthesized by one-pot method, and then used as signal amplification to highly improve sensitivity of the detection, while a smartphone-based quantitative detection device could rapidly quantify results to improve the detection efficiency of the LIFA for on-site detection. After optimization, the detection time of the assay was 10 min, and the detection limits of the LIFA for DON/ZEN were 0.24/0.04 ng/mL, which were improved 416 and 150 folds compared to the conventional gold nanoparticles (GNPs)-based LFIA. Moreover, there was no obvious cross-reaction with other related mycotoxins, indicating that LFIA had a high specificity. The average recoveries of DON and ZEN from corn, wheat and three water samples were obtained from 94.3 % to 107.9 % with relative standard deviations of 0.2–7.6 %. Furthermore, the accuracy and reliability of the LIFA were evaluated with three spiked water samples, and the results presented good correlations with analytic results from the enzyme-linked immunosorbent assay (R2 =0.988 for DON, and 0.983 for ZEN). The results indicate the proposed LIFA was potentially a rapid, on-site simultaneous and highly sensitive method for DON and ZEN detection in the aqueous environment.
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•An efficient detection method was established for deoxynivalenol and zearalenone in the aqueous environment.•The self-developed quantitative detection equipment can realize the on-site quantitative detection of mycotoxins.•The Au@Pt/AEC-based LFIA can significantly improve detection sensitivity compared to the conventional GNPs-based LFIA.
Phenol is classified as one of the environmental pollutants and is found in the wastewaters of various industries such as petroleum industry, paint and chemical industries, oil refining and textile ...industries. High concentrations of this substance are harmful to human health and can cause adverse cardiac and neurological effects. Therefore, it seems necessary to eliminate this material from industrial wastewater, although their elimination requires the use of new methods. In this regard, in this work, two-dimensional adsorbents have been used to remove phenol from the aqueous environment. To do this, the ability to simulate molecular dynamics in investigating the interactions of phenol molecules and 4 transition metal dichalcogenides (TMDs)v Used. CdS2 had the largest level of interaction with phenol molecules and had the greatest effect in removing phenol from the aqueous environment. The results obtained from this work have provided new materials to remove phenol from the wastewater petroleum industry and can facilitate the widespread use of these materials in industrial petroleum wastewater treatment.
Here, we demonstrate a diffraction-free Bloch surface wave sustained on all-dielectric multilayers that does not diffract after being passed through three obstacles or across a single mode fiber. It ...can propagate in a straight line for distances longer than 110 μm at a wavelength of 633 nm and could be applied as an in-plane optical virtual probe both in air and in an aqueous environment. Its ability to be used in water, its long diffraction-free distance, and its tolerance to multiple obstacles make this wave ideal for certain applications in areas such as the biological sciences, where many measurements are made on glass surfaces or for which an aqueous environment is required, and for high-speed interconnections between chips, where low loss is necessary.
•Long-term creep of bio-based concrete in aqueous environment is investigated.•Creep strain of bio-based concrete decreases with the increase of water pressure.•A modified Burgers piecewise model for ...bio-based concrete is proposed.
Bio-based materials generally have high porosity, which are prone to biodegradation during the long-term application, especially in a humid environment. To better understand the impact of the aqueous environment on creep performance of bio-based concrete, the effects of the loading method (single-stage and multi-stage), axial force (50 kN, 100 kN, 150 kN), and water pressure (1 MPa, 2 MPa, 3 MPa) on the long-term creep characteristics of bio-based apricot shell concrete are investigated in this study, with a creep duration of up to 1051 h. The results show that water pressure has a significant effect on the creep properties of apricot shell concrete. The creep strain and creep rate of apricot shell concrete gradually decrease with the increase of water pressure, which attributes to the water confining pressure that restrains the propagation of micro-cracks and consequently reduces the creep strain. Moreover, the creep strain and creep rate of apricot shell concrete increase with the increase of axial force. The creep behavior of bio-based apricot shell concrete in low load level is well described by a proposed Burgers piecewise creep model, which is recommended to express the long-term creep behavior of bio-based apricot shell concrete in the aqueous environment.
Nowadays, advances in science and technology in biological macromolecules have led to the early detection and treatment of cancer-based cells. In this study, molecular dynamics (MD) simulation ...examines atomic interactions between 3DN5 and 5OTF structures. Technically, the effect of the initial temperature on the atomic behavior (AB) of the simulated samples is investigated. The stability of simulated structures is examined with changes in temperature and kinetic energy (KE) quantities. The biomechanical interaction is examined by the radius of gyration (RoG), interaction energy (IE), and interaction force (IF). The results show that the RoG changes from a numerical value of 40.25 to 41.33 Å, and the IE and IF converge to −552.38 kcal/mol and − 207.10 kcal/mol.Å after 10 ns, respectively. Due to the temperature effect on the AB of the structures, the RoG increases by increasing the initial temperature from 41.33 to 58.91 Å. By increasing the initial temperature to 350 K, the IE increases from −551.38 to −500.11 kcal/mol, and the IF increases from −207.10 to −183.39 kcal/mol.Å. Finally, the results of these studies are expected to lead to early detection and treatment of cancer cells.
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•Molecular dynamics method was implemented.•The stability is examined with changes in temperature and kinetic energy.•The biomechanical interaction is examined by the radius of gyration, interaction energy and interaction force.•The gyration radius increases from 41.33 to 58.91 Å.•The results of these studies are expected to lead to early detection and treatment of cancer cells.
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•A novel and easy one-step method for the synthesis of the aryl- and ferrocenyl-based carbazole derivatives was developed.•The ferrocenyl-based chemosensor displayed reversible ...fluorescent “turn on” response toward Hg2+ in aqueous environment.•The ferrocenyl-based probe could perform naked-eye detection of Cu2+ in aqueous environment.•The ferrocenyl-based chemosensor can be used for determination of Hg2+ in living cells.
Ferrocenyl-based carbazole derivative has been synthesized by a simple one-step reaction and characterized by 1H NMR, 13C NMR, ESI-MS and X-ray analysis. Meanwhile, The newly synthesized receptor 1 displayed reversible fluorescent “turn on” response toward Hg2+ with good quantum yield in aqueous environment. The color of the solution containing receptor 1 changed from colorless to yellow upon the addition of Cu2+ ions. Therefore, receptor 1 can act as a fluorescent chemosensor for Hg2+ and a naked-eye probe for Cu2+ in aqueous environment. Quantification of absorption titration analysis shows that the detection limit was 6.15×10−7M for 1-Cu2+ and 3.16×10−7M for 1-Hg2+, respectively. Finally, the receptor 1 has been used successfully for determination of Hg2+ in living cells.
Silver nanowires were successfully prepared by one-step growth method in aqueous environment. The suitable pH value is a key factor for the successful preparation of silver nanowires. The ...concentration of silver nitrate precursors also affects the yield of silver nanowire. We studied the growth mechanism of silver nanowires in detail. This is a classic Ostwald ripening process. The final silver nanowires are face-centered-cubic (FCC) phase. The morphologic parameters of the silver nanowires were observed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Its size is about 7 m long and about 45 nanometers in diameter. This experiment provides an effective method for the preparation of silver nanowires in aqueous environment. It has important potential applications in biological detection and physical devices.
Molecularly imprinted polymers (MIPs) are types of specific materials capable of recognizing and selecting compounds toward which they have been imprinted. This ability has made these materials ...increasingly popular in different areas e.g. for monitoring the content of harmful substances in various products, including water. In addition, many chemicals of various structures and applications are used as templates. The presented paper is a review that demonstrates knowledge and understanding of the molecularly imprinted polymers toward herbicides, with particular emphasis on the impact and needs to control their content, e.g. in plant parts, soils, or groundwater. This work focused especially on one of the newest herbicides used in large amounts, S-metolachlor, which is used in maize cultivation. It reviews the latest publications describing polymerizations in organic solvents and in water. Due to the much better solubility of pesticides in organic solvents, this type of polymerization is much more often described. However, due to the growing concern for the environment and the principles introduced in the so-called green chemistry, increasing emphasis should be placed on polymerization in an aqueous environment.
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•Molecularly imprinted polymers (MIPs) towards herbicides.•Green molecularly imprinted polymers.•Molecularly imprinted polymers capable of detecting chloroacetanilides.•MIPs synthesized in organic and aqueous environment.
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