ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2022
·Vol. 415
·期 18
·4265-4275
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IF 4.478
Wang Tingting,Chen Yihui,Hou Chunyan,Qiao Xiaoqiang
A novel type of PEG-modified halloysite was prepared and used as a hydrophilic interaction and cation exchange mixed-mode sorbent for solid-phase extraction of biogenic amines in fish samples. The eluates were analyzed by high-performance liquid chromatography-ultraviolet detection after the derivatization with benzoyl chloride. The developed sorbent was characterized by scanning electron microscopy, infrared spectroscopy, X-ray diffraction, zeta potential analyzer, and thermo-gravimetric analysis. After the optimization of various parameters influencing the extraction efficiency, the PEG-modified halloysite-based SPE method was evaluated. The adsorption capacities of putrescine, spermine, phenethylamine, and histamine were as high as 9.3, 8.5, 5.7, and 5.6 mg g −1 , respectively. Satisfactory reproducibility of sorbent preparation was obtained with within-batch and batch-to-batch relative standard deviations (RSDs) lower than 3.9% and 8.6%, respectively. The biogenic amine spiking recoveries in fish samples ranged from 84.3 to 105.5% with good RSDs lower than 7.8%. Intra-day and inter-day precision, expressed as RSDs, were better than 8.8%. The limits of detection of histamine, putrescine, phenethylamine, and spermine were 9.4, 1.9, 0.5, and 0.9 μg L −1 , respectively. This work provides a new hydrophilic interaction and cation exchange mixed-mode sorbent and is successfully applied to the extraction of trace biogenic amines from fish samples. Graphical Abstract
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Food & Function
·
2022
·Vol. 14
·期 1
·250-261
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IF 6.317
Wenjie Yu,Fengjie Sun,Ruixin Xu,Meng Cui,Yongquan Liu,Quanyuan Xie,Limin Guo,Chenxian Kong,Xin Li,Xiali Guo,Liping Luo
Castanopsis is diffusely spread in tropical and subtropical regions and is an important nectar source plant in China. The Castanopsis honey (CH) is characterized by its bitter taste. However, its composition and functions remain unclear. In this study, the physicochemical parameters, chemical composition, and antioxidant capacity of CH were comprehensively investigated, with the anti-inflammatory effects of the Castanopsis honey extract (CHE) evaluated based on the RAW 264.7 cell inflammatory model. The results revealed a high level of quality in CH based on the quality standards. Among a total of 84 compounds identified in CH, 5 high response compounds and 29 phenols were further quantified by UPLC-Q/TOF-MS. The high content of phenylethylamine (117.58 ± 64.81 mg kg−1) was identified as a potential marker of CH. Furthermore, the CH showed evident antioxidant activities, and the anti-inflammatory activities of CHE were observed to inhibit the release of nitric oxide (NO) and reduce the content of tumor necrosis factor alpha (TNF-α) and improve the content of interleukin-10 (IL-10) by regulating the NF-κB pathway. Our study indicates that CH has sound physicochemical properties and biological activities with a high level of quality, providing strong experimental evidence to support the further economic and agricultural development and application of CH.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Da Xu,Chun Sun,Jiachen Han,Hu Zhang,Jiaqi Tao,Tong Wei,Chao Fan,Zihui Zhang,Wengang Bi
Compared to the three-dimensional (3D) counterparts, single-layered two-dimensional (2D) perovskites show high stability, high exciton binding energy and structural flexibility that are beneficial for light-emitting diodes (LEDs) applications. Yet, the emission peaks of single-layered 2D perovskites are strongly limited to the blue-green region due to their very strong quantum confined effect, hampering their application. Doping ions has been recognized as a promising way to tune emission wavelengths. In this work, we have prepared Eu 3+ doped PEA 2 PbCl 4 perovskites by a hot-injection method. Its Eu 3+ emission is not stable, which disappears after exposed in the air due to the coordination of Eu 3+ with H 2 O or O 2 . By exploiting strong ligands of thenoyltrifluoroacetone (TTA), the H 2 O or O 2 can be replaced, resulting in a rigid coordination environment for Eu 3+ . Besides, energy level alignment can be modified by the passivation of TTA, leading to effective energy transfer from exciton to Eu 3+ . In the end, stable red-emitting perovskite is acquired with a photoluminescence quantum yield (PLQY) up to 83%. This work provides new synthetic strategies for the design of high-performance perovskite/lanthanide composites.
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JOURNAL OF CHROMATOGRAPHY A
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2022
·
IF 4.601
Xu Xu,Jiaxin Gao,Di Cao,Xiang Li,Xin Zhao,Shuang Yue,Lei Zhang
In this paper, the novel 3D N-doped magnetic porous carbon spheres (3D N-MPCSs) was constructed via a simple template-free and self-doping method, followed by a direct carbonization of polymer with Fe 3+ for simultaneous activation and magnetization. For the first time, the designed 3D N-MPCSs was used as multifunctional (for extraction and magnetic separation) adsorbents for microwave-assisted derivatization and magnetic solid phase extraction, which exhibited excellent extraction ability for its large surface area, mesoporous structure, spherical morphology, and incorporation of N/O heteroatoms. Moreover, when the microwave-assisted derivatization was combined with the magnetic solid phase extraction, the extraction, derivatization and concentration was completed simultaneously within 135 s. Furthermore, this method has a low detection limit (0.059–0.073 ng mL −1 ) and high enhancement factors (333 < EFs < 382) for trace biogenic amine (BAs). The recoveries were between 92.3 and 108.8% with relative standard deviations less than 5.9%. Overall, a simple, rapid, efficient and sensitive method for the analysis of BAs in food samples was developed, which provided the basis for routine detection of food safety.
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Nanoscale
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2022
·Vol. 14
·期 16
·6109-6117
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IF 8.307
Junyu Li,Yousheng Zou,Dawei Hu,Yu Gu,Zeyao Han,Jiaxin Liu,Xiaobao Xu
Terahertz (THz) detection technology is getting increasing attention from scientists and industries alike due to its superiority in imaging, communication, and defense. Unfortunately, the detection of THz electromagnetic waves under room temperature requires a complicated device architecture design or additional cryogenic cooling units, which increase the cost and complexity of devices, subsequently imposing an impediment in its universal application. In this work, THz detectors operated under room temperature are designed based on the thermoelectric effect with MAPbI3 single crystals (SCs) as active layers. With solution-processed molecular growth engineering, the anti-reflection 2D perovskite layers were constructed on SCs’ surfaces to suppress THz reflection loss. Simultaneously, by finely regulating the main carrier types and the direction of the applied bias across the inclined energy level, the thermoelectric effect is further promoted. As a result, THz-induced ΔT in MAPbI3 SCs reaches 4.6 °C, while the enhancement in the bolometric and photothermoelectric effects reach ∼4.8 times and ∼16.9 times, respectively. Finally, the devices achieve responsivity of 88.8 μA W−1 at 0.1 THz under 60 V cm−1, noise equivalent power (NEP) less than 2.16 × 10−9 W Hz−1/2, and specific detectivity (D*) of 1.5 × 108 Jones, which even surpasses the performance of state-of-the-art graphene-based room-temperature THz thermoelectric devices. More importantly, proof-of-concept imaging gives direct evidence of perovskite-based THz sensing in practical applications.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
·
IF 4.831
Peng Zhang,Shufen Zhang,Xiaoxi Hu,Maosheng Zhang,Chaoyu You,Guoliang Chen,Wenli Yang,Wei Huang,Tianju Chen,Feiming Li
Determination of cesium ion in soybean oil is of high importance since the increasing risk from releasing of main component of nuclear waste cesium 137. The complex composition and high viscosity of soybean oil make it necessary to convert it into water phase by nitration before detection, so developing a simple, accurate and sensitive method for on-site sensing of Cs + in soybean oil is still a big challenge. In this work, we report a traffic light-type ratiometric fluorescence strategy for the visual sensing of Cs + in soybean oil based on dimensional regulation of two dimensional (PEA) 2 PbI 4 perovskite nanosheets (NSs). The PEA + in (PEA) 2 PbI 4 NSs exchanged with Cs + and lead to dimension of partial (PEA) 2 PbI 4 NSs progressively increase from 2D to 3D CsPbI 3 NCs. Resultantly, the fluorescence of (PEA) 2 PbI 4 NSs decreases with a concomitant fluorescence enhancement of CsPbI 3 NCs upon increasing the concentrations of Cs + , and the emission accordingly change from green, yellow to red with a high fluorescence colorimetric resolution up to 5.0 μM, make it successful to achieve on-site sensing of Cs + in soybean oil just with naked eye in 5 min without any nitration, demonstrating a bright application future for determination of Cs + in the soybean oil.
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Materials Today Physics
·
2022
·
IF 11.021
Fengxian Cao,Huiwen Chen,Shibo Wang,Pengxu Chen,Chenwei Zhu,Zhang Lan,Weihai Sun,Yunlong Li,Jihuai Wu
The highly efficient perovskite solar cells (PSCs) along with excellent long-term stability can be obtained by fabricating two-dimensional (2D) perovskites (PVKs) over the three-dimensional (3D) PVKs film. However, the additional step of forming 2D PVKs before depositing the hole/electron transporting layer would make the device fabrication processes complicated, increasing costs for the manufacture of PSCs. In the present work, 2D PVKs were in-situ formed on surface of the 3D PVKs film by a self-assembly method, together with the deposition of the hole transporting material (HTM) at the same time, which tremendously simplified the fabrication of PSCs based on 3D PVKs/2D PVKs. Based on the one-step constructed 2D PVKs/HTM dual interfacial layers , density of trap states in devices were decreased remarkably owing to efficient interfacial passivation . In the meantime, the hydrophobicity , conductivity and hole extraction ability of the HTM were generally improved, enhancing the operational stability and performance of the solar cells. Thus, the corresponding solar cells increased 10% of average power conversion efficiency , where the highest open circuit voltage is up to 1.174 V. After 672 h of exposure under full 1-sun simulation in ambient conditions, the device still retained more than 82% of its initial PCE which was almost 50% higher than that of the control device.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
·
IF 4.831
Jianfeng Yan,Quanbin Fu,Shikai Zhang,Yu Liu,Xianbao Shi,Juying Hou,Junling Duan,Shiyun Ai
A novel dual-emission ratiometric fluorescent sensor for biogenic amines (BAs) was prepared by simple mixing blue fluorescent carbon dots (CDs) and yellow fluorescent CdTe quantum dots (CdTe QDs). Based on different sensitive properties of pH, CdTe QDs and CDs were used as the response signal and internal reference signal, respectively. The developed ratiometric fluorescent sensor achieved quantitative analysis of eight kinds of BAs with rapid response (30 s) and low limits of detection (1.259–5.428 μM). Furthermore, color-tunable fluorescent test strips were constructed by easily assembling CDs and CdTe QDs onto filter paper. The obtained smart label showed a distinguishable fluorescent color variation from blue to green during the corruption of shrimp samples. The smart label with advantages of convenience and rapidness provided a method for visually monitoring the freshness of food samples.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Nuo Duan,Changxin Li,Xiaoyin Zhu,Shuo Qi,Zhouping Wang,Shijia Wu
Histamine (HIS) and tryptamine (TRY) are heterocyclic biogenic amines (BAs) often found in food products. The consumption of products containing high levels of BAs results in a wide range of life-threatening physiological reactions. The work described a Simultaneous coupled with Separate selection strategy for the screening of different aptamers against histamine and tryptamine. Aptamer HIS-3 and TRY-2 exhibited a good binding affinity ; specificity and pH stability to histamine and tryptamine were obtained with a dissociation constant of 11.62 ± 3.241 nM and 6.303 ± 1.758 nM, respectively. The preliminary binding mechanism was analyzed using a circular dichromatic (CD) and molecular docking. Finally, the identified aptamers were used for the development of a colorimetric method for the detection of histamine and tryptamine, achieving limits of detection of 1 ng/mL and 10 ng/mL, respectively. This aptamer-based method was further successfully employed to detect the BAs in fish and pork, providing a potential application for sensitive and efficient detecting multiple food risk factors.
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JOURNAL OF MOLECULAR STRUCTURE
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2021
·
IF 3.196
Jinyi Liu,Haojie Yu,Li Wang,Sergey Z. Vatsadze,Zhikun Huang,Bilal Ul Amin
Ferrocene (Fc)-based compounds as common burning rate catalysts (BRCs) are often used in composite solid propellants, such as catocene ( Cat ). To solve the migration problem of common Fc-based compounds, six novel ferrocene (Fc)-based phenylethylamino BRCs were designed and synthesized. Their structures as well as catalytic performance for ammonium perchlorate (AP) decomposition were studied by UV–Vis, FT-IR, 1 H NMR, 19 F NMR, ESI-MS, EA, CV and TG, respectively. The test results indicated that these Fc-based phenylethylamino BRCs had good catalytic activity for thermal decomposition of AP and better anti-migration ability than Cat and Fc in simulated AP-based propellant. Among these compounds, Fc-2 showed the best catalytic activity for thermal decomposition of AP and Fc-6 showed the best anti-migration ability. This study demonstrates that Fc-based phenylethylamino compounds are promising BRCs for AP-based propellant.
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ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 8
·2105164
·
IF 18.808
Weigang Ding,Hongli Liu,Shuai Zhang,Dingding Qiu,Xianggao Li,Shirong Wang
Perovskite films have emerged as candidates for light-emitting diodes on accounts of excellent optical properties and low cost. Construction of quasi-2D perovskite films by incorporating organic ammonium is an effective method to manufacture a pinhole-free film with high photoluminescence quantum yield (PLQY). However, excess organic ammonium hampers carrier mobility through forming insulating capping layer and facilitates the formation of alow-dimensional perovskite ( n = 1 and n = 2) phase that accelerates non-radiative recombination, resulting in poor performance of light-emitting diodes. In this work, formamidine acetate is added into the quasi-2D perovskite to modulate the optical and electrical properties of the perovskite films (CsFA-Ac). Acetate ions are in favor of washing away excess ammonium and formamidine ions are beneficial to increase the formation energy of low-dimensional ( n = 2) phase. As a result, the quasi-2D perovskite is transformed into 3D perovskite. The PLQY of the obtained CsFA-Ac perovskite films is boosted to 59.9% and carrier mobility is enhanced to 47.3 cm 2 V -1 s -1 . Blue perovskite light-emitting diode based on the CsFA-Ac film is endowed with a prominent EQE of 8.8% (average 7.0%) at 477 nm. This work demonstrates a strategy for the development of efficient perovskite light-emitting diodes.
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Foods
·
2021
·Vol. 10
·期 11
·2572
·
IF 4.35
Xinxiu Ma,Jingran Bi,Xinyu Li,Gongliang Zhang,Hongshun Hao,Hongman Hou
In this study, high-throughput sequencing and culture-dependent and HPLC methods were used to investigate the contribution and regulation of biogenic amines (BAs) by dominant microorganisms during fish sauce fermentation. The results showed that the microbial composition constantly changed with the fermentation of fish sauce.Tetragenococcus(40.65%),Lentibacillus(9.23%),Vagococcus(2.20%),Psychrobacter(1.80%),Pseudomonas(0.98%),Halomonas(0.94%) andStaphylococcus(0.16%) were the dominant microflora in fish sauce. The content of BAs gradually increased as the fermentation progressed. After 12 months of fermentation, the histamine content (55.59 mg/kg) exceeded the toxic dose recommended by the Food and Drug Administration (FDA). Correlation analysis showed that dominant microorganisms have a great contribution to the accumulation of BAs. By analyzing the BA production capacity of dominant isolates, the accumulation of BAs in fish sauce might be promoted byTetragenococcusandHalomonas. Moreover, four strains with high BA reduction ability were screened out of 44 low BA-producing dominant strains, and their influence on BA accumulation in fermented foods was determined. Results demonstrated thatStaphylococcus nepalensis5-5 andStaphylococcus xylosusJCM 2418 might be the potential starters for BA control. The present study provided a new idea for the control of BAs in fermented foods.Keywords:fish sauce;biogenic amines;microbial community dynamics;starter;correlation analysis
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