Foods
·
2023
·Vol. 12
·期 5
·924
·
IF 5.2
Shuyue Fan,Caiyun Liu,Yunkui Li,Yu Zhang
A visual and easy-to-implement representation approach of red wine color is proposed in this work. The wine color under standard conditions, called feature color, was reproduced in the form of a circular spot. The feature color was further decomposed into two orthogonal aspects, the chromatic and light–dark components, characterized in the form of chromaticity distribution plane and lightness distribution plane, respectively. The color characterization of wine samples showed that this method well represented the color characteristics and can provide intuitive visual perception of wine color, in a way that is more reliable and convenient than the photographic method. The applications for monitoring the color evolution during winery and laboratory fermentation and the age discrimination of 175 commercial red wines suggest that this visual method is effective for color management and control of wine during fermentation and aging. The proposed method is a convenient way to present, store, convey, understand, analyze and compare the color information of wines.Keywords:color visualization;color characterization;color reproduction;wine fermentation;CIELAB
研究领域:
食品科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2022
·
IF 5.122
Lingfei Liu,Minjie Qian,Zhen-quan Yang,Lixia Xiao,Xiaojuan Gong,Qin Hu
In this work, a facial ratiometric fluorescence nanorpobe (RFP) based on gadolinium and nitrogen co-doped CDs ( Gd , N -CDs) was for the first time proposed for visual detection of folic acid (FA). The Gd , N -CDs were prepared by hydrothermal heating of Gd(NO 3 ) 3 ⋅6H 2 O, o-phenylenediamine (OPD), 4-aminobenzoic acid (PABA). The as-prepared Gd , N -CDs had an average particle size of 10.27 ± 0.35 nm and exhibited two emission bands at 396 and 548 nm, respectively upon excitation at 340 nm. In the presence of FA, the 560 nm emission of Gd , N -CDs was reduced while the fluorescence signal at 457 nm was enhanced, and the quantitatively determination of FA was based on the fluorescence intensity ratio (F 457 /F 560 ). The as-constructed RFP achieved a linear range of 0.0–30.0 μM and a low detection limit (LOD) of 3.43 nM. In particular, a distinguishable change in fluorescence colour from bright orange to blue enabled the development of a smartphone-assisted visual sensing platform and a paper-based analytical device for FA detection with LODs of 3.06 μM and 0.83 μM, respectively. The proposed sensing platform was successfully utilised for onsite detection of FA in vegetable, fruit and yolk samples with satisfactory results were achieved. This work highlights the application potential of smartphone-integrated CDs-based RFP as a promising portable method for on-site analysis of FA.
研究领域:
分析化学
·
生物医学
✓ 已验证
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2024
·
IF 7
Yan Hu,Huahao Yu,Xinbei Song,Wei Chen,Lejia Ding,Jiayi Chen,Zhiyuan Liu,Yihang Guo,Dongyun Xu,Xuesong Zhu,Chuangchuang Zhou,Jingfei Zhang,Binhui Liao,Jihong Zhou,Xiaoli Li,Yuefei Wang,Yong He
Matcha, made from different tea leaves as raw material, exhibits diverse aromas and flavors. Therefore, there is an urgent need for a rapid, non-destructive method to assess the quality of matcha to ensure that these different characteristics are accurately assessed without compromising the integrity of the product. In this study, hyperspectral imaging technology (HSI) combined with machine learning methods enabled the first visual in situ assessment of matcha quality. The physicochemical contents of matcha were determined chemically. Qualitative and quantitative detection models for different types and grades were developed using HSI (containing Vis-NIR and NIR band). The results showed that hyperspectral data in the Vis-NIR were better than in the NIR band. The accuracy of XGBoost in modelling the classification of matcha grades reached 98.10 %. After feature selection using the random forest (RF) method, partial least squares regression (PLSR) was built to predicted the quality of matcha, which showed high prediction accuracy (test set R p 2 > 0.95). The model uses HSI to visually visualize spatial variations in constitutions (catechins, free amino acids, caffeine, soluble proteins, and soluble sugars) to show compositional differences between different types of matcha, providing a rapid non-destructive method for comprehensive assessment of matcha quality.
研究领域:
食品科学
·
光谱学
·
人工智能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Daomiao He,Likun Guan,Huayu Sun,Fanzhong Zeng,Fei Li,Leyi Zhang,Wenhao Li,Huajuan Deng,Dan Zhang,Ruijin Yu
A novel series of samarium-activated orange-red emitting CaY 2 Sb 2 (ZnO 4 ) 3 (CYSZO) phosphors has been successfully synthesized by the high-temperature solid-state method. The phase purity, spectroscopy, and morphological properties of the phosphors have been extensively characterized. When excited at 407 nm, CYSZO:Sm 3+ samples exhibited a pronounced orange-red emission peak at 610 nm, this corresponding to the typical 4 G 5/2 → 6 H 7/2 both magnetic-dipole and electric-dipole transitions of Sm 3+ ions. The optimal doping concentration was established as 10 mol%. The quenching mechanism is attributed to the interaction of the nearest-neighbor ions. The prepared sample showed a remarkable internal quantum efficiency (IQE) of 68.63 % and exceptional thermal stability at working temperature of the LEDs. As the Sm 3+ concentration increased, the decay time decreased correspondingly, ranging from 2.45 ms to 1.40 ms for concentrations ranging from 0.6 to 40 mol%. The phosphor materials exhibited high color purity, as evidenced by the Commission International de L'Éclairage (CIE) chromaticity coordinates. The synthesized white light-emitting diode (w-LED) exhibited an impressive color rendering index (CRI) of 96 and a desirable correlated color temperature (CCT) of 5674 K. Furthermore, the CYSZO:10 mol%Sm 3+ @oleic acid phosphor-stained latent fingerprint (LFP) images show excellent visualization capabilities on various surfaces with high contrast and long-term stability. These results highlight the potential of CYSZO:Sm 3+ phosphors to serve as a promising orange-red material for w-LED applications and LFP detection.
研究领域:
材料科学
·
光学
·
法医学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Chonghui Wei,Shu Zhu,Jiacheng Lu,Aoran Guan,Yan Sun,Liyun Zeng,Jinghao Fu,Xingyu Luo
Background Hydrogen peroxide (H 2 O 2 ) plays a vital role in human health and have been regarded as a crucial analyte in metabolic processes, redox transformations, foods research and medical fields. Especially, the long-time and excessive digestion of H 2 O 2 may even cause severe diseases. Although conventional instrumental methods and nanozymes-based colorimetric methods have been developed to accomplish the quantitative analysis of H 2 O 2 , the drawbacks of instrument dependence, cost-effectiveness, short lifespan, non-portable and unsustainable detection efficacies will limit their applications in different detection scenarios. Results Herein, to address these challenges, we have proposed a novel strategy for nanozyme (RuO 2 ) hydrogel preparation by the solid support from cross-linked polyvinyl alcohol (PVA) and chitosan (CS) to both inherit the dominant peroxidase-like (POD) activity and protect the RuO 2 from losing efficacies. Taking advantages from the hydrogel, the encapsulated RuO 2 were further prepared as the regularly spherical beads (PCRO) to exhibit the sustainable, recyclable, and robust catalysis. Moreover, the intrinsic color interferences which originated from RuO 2 can be avoided by the encapsulation strategy to promote the detection accuracy. Meanwhile, the high mechanical strength of PCRO shows the high stability, reproducibility, and cyclic catalysis to achieve the recyclable detection performance and long lifetime storage (40 days), which enables the sensitively detection of H 2 O 2 with the detection limit as lower to 15 μM and the wide detection linear range from 0.025 to 1.0 mM. Significance On the basis of the unique properties, PCRO has been further adopted to construct a smartphone detection platform to realize the instrument-free and visual analysis of H 2 O 2 in multi-types of milk and real water samples through capturing, processing, and analyzing the RGB values from the colorimetric photographs. Therefore, PCRO with the advanced detection efficacies holds the great potential in achieving the portable and on-site analysis of targets-of-interest.
研究领域:
生物化学
·
材料科学
·
医学检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Jiaying Geng,Zhongxi Huang,Qian Shen,Chenfeng Xu,Long Zhang,Cuilan Wei,Chan Fu,Weizhen An,Changmin Yu
With the emergence of numerous food safety problems, rapid and accurate detection of histamine in food spoilage remains a challenge. To this end, we developed a simple design and easy synthesis of fluorescein-based probe FCHO to achieve specific and rapid (<1 s) quantitative detection of histamine through “imine formation” reaction. Significant enhanced fluorescence signal in response to histamine enabled our probe with high sensitivity as low as 51 nM. Utilizing the visualized fluorescence color changes of the probe as histamine increasing, we combined it with paper-based test chip to construct a color-resolved and highly selective recognition system. In addition, our proposed probe has been successfully used to visually imaging histamine changes in fish samples. Finally, for the first time, we have proved it possesses reliable ability to directly in situ imaging the distribution of histamine in whole spoiled fish. Thus, our strategy will provide great potential for monitoring food spoilage.
研究领域:
食品安全
·
分析化学
·
生物传感
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2015
·
IF 5.636
Ke Huang,Kailai Xu,Wei Zhu,Lu Yang,Xiandeng Hou,Chengbin Zheng
A low-cost, simple, and highly selective analytical method was developed for sensitive visual detection of selenium in human urine both outdoors and at home, by coupling hydride generation with headspace solid-phase extraction using quantum dots (QDs) immobilized on paper. The visible fluorescence from the CdTe QDs immobilized on paper was quenched by H2Se from hydride generation reaction and headspace solid-phase extraction. The potential mechanism was investigated by using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) as well as Density Functional Theory (DFT). Potential interferences from coexisting ions, particularly Ag+, Cu2+, and Zn2+, were eliminated. The selectivity was significantly increased because the selenium hydride was effectively separated from sample matrices by hydride generation. Moreover, due to the high sampling efficiency of hydride generation and headspace solid phase extraction, the sensitivity and the limit of detection (LOD) were significantly improved compared to conventional methods. A LOD of 0.1 μg L–1 and a relative standard deviation (RSD, n = 7) of 2.4% at a concentration of 20 μg L–1 were obtained when using a commercial spectrofluorometer as the detector. Furthermore, a visual assay based on the proposed method was developed for the detection of Se, 5 μg L–1 of selenium in urine can be discriminated from the blank solution with the naked eye. The proposed method was validated by analysis of certified reference materials and human urine samples with satisfactory results.
研究领域:
分析化学
·
环境科学
·
生物医学
✓ 已验证
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 10
·1-10
·
IF 5.3
Shi Jinyu,Wu Suyi,Xue Yu,Xie Qing,Danzeng Qunzeng,Liu Cui,Zhou Chuan-Hua
A convenient and sensitive dual-signal visualization method is constructed for detection of trivalent chromium ions (Cr 3+ ) based on fluorescent carbon dots (CDs) and glutathione-modified gold nanoparticles (GSH-Au NPs). The fluorescence of CDs can be quenched by GSH-Au NPs due to the inner filter effect. Cr 3+ induces aggregation of GSH-Au NPs because of the coordination with GSH on the surface of Au NPs, leading to the red shift of surface plasmon resonance absorption of Au NPs that provides a “turn-on” fluorescence and colorimetric assay for Cr 3+ . The fluorescence/colorimetric dual signal detection shows high sensitivity for Cr 3+ with wide detection linear ranges (0.5–70 μM for fluorescence detection and 2–50 μM for colorimetric detection) and low detection limits (0.31 μM for fluorescence detection and 0.30 μM for colorimetric detection). Besides, the method has high selectivity for Cr 3+ and can be used for detection of Cr 3+ in lake water and tap water samples, showing great potential for visual detection of environmental Cr 3+ . Graphical Abstract
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2024
·Vol. 16
·期 11
·1686-1696
·
IF 2.7
Xinyue Zhang,Si Wu,Tao Feng,Yuanhao Yan,Shijing Wu,Yinyu Chen,Yu Wang,Qingmiao Wang,Ning Hu,Li Wang
Based on the versatile properties of bio-derived materials, non-enzymatic assays in combination with electronic devices have attracted increasing interest. Here, we report a novel enzyme-free visualization approach for the detection of erythritol, which is a zero-calorie natural sweetener and serves as an ideal sucrose substitute for diabetics or overweight people who need sugar control. The recognition element of the electrochemical biosensor was constructed by catechol modification on a chitosan-based hydrogel film. The signal transduction was achieved by the competitive binding assay of sweeteners. The results show that 2-fluorophenylboronic acid (FPBA) can form a cyclic boronate ester with the ortho-hydroxyls of both reduced catechol and oxidized quinone, impeding the electron transfer and leading to redox signal attenuation. The addition of sweeteners caused a competitive reaction resulting in bonding between the 1,2-diols and FPBA moieties, and in the recovery of the redox signals. Importantly, the pattern of redox signal changes of catechol can be detected optically, as the oxidized quinone state is darker in color than the reduced catechol state. Using a simple cell phone imaging application, we demonstrate that erythritol can be distinguished from other sweeteners in real samples using the oxidized catechol-Chit0/agarose hydrogel film. Thus, we envision that this method could allow diabetics and people who need to control their sugar intake to detect whether the product contains only erythritol in the field or at home. In addition, this work further illustrates the potential of bio-derived materials for performing redox-based functions and enzyme-free visualization assays.
研究领域:
生物化学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2016
·Vol. 184
·期 2
·541-546
·
IF 4.831
Zhang Ruoxi,Deng Li,Zhu Paijin,Xu Shuxia,Huang Chengpeng,Zeng Ying,Ni Shijun,Zhang Xinfeng
The article describes a bienzyme visual system for aptamer-based assay of Hg(II) at nanomolar levels. The detection scheme is based on the finding that Hg(II) ions captured by aptamer-functionalized magnetic beads are capable of inhibiting the enzymatic activity of uricase and thus affect the formation of H 2 O 2 and the blue product, i.e., oxidized tetramethylbenzidine. This strategy allows for a visual detection of Hg(II) at nanomolar levels without additional amplification procedure. Measuring the absorbance at 650 nm, the logarithmic calibration plot is linear in the concentration range of 0.5–50 nM and the limit of detection (LOD) is 0.15 nM. This is as low as the LOD obtained by atomic fluorescence spectrometry (AFS). The ions K + , Mg 2+ , Na + , Ca 2+ , Cu 2+ , Zn 2+ , Fe 3+ , Al 3+ , Co 2+ , AsO 2
− , Ni 2+ , Cd 2+ and Pb 2+ do not have a significant effect on color formation. The method was applied to the analysis of (spiked) river water, lake water, mineral water, tap water and certified reference water samples, and the results agreed well with those obtained by AFS or certified values, with recoveries ranging from 97% to 109%. The relative standard deviation for five parallel detections at a 10 nM Hg(II) level is 5.2%.
A bienzyme-based visual aptasensor was fabricated for label-free detection of nanomolar Hg 2+ in water samples without any amplification or enrichment procedure.
研究领域:
分析化学
·
环境科学
·
生物技术
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2025
·
IF 7.9
Yu Ma,Bin Zhao,Guozhen Yan,Ting Zhou,Zhihua Xu,Zhihan Niu,Zhenghong Xu,Tongtong Zhang,Feng Shi
Nucleic acid dyes play important roles in the quantification and detection of nucleic acids by binding to nucleic acids. However, traditional nucleic acid dyes pose great environmental and economic challenges due to their high price, high toxicity, long dyeing time, low sensitivity and insufficient stability. To overcome these problems, we developed a new nucleic acid dye based on carbon dots, which were generated through hydrothermal synthesis with liquorice components as precursors and a system containing ethylenediamine. This new type of carbon dot can effectively replace traditional dyes and can be used to efficiently visualize DNA, RNA and plasmids via agarose gel electrophoresis. Then, we studied the interaction mechanism between carbon dots and nucleic acids by UV–visible spectroscopy, Fourier transform infrared spectroscopy and circular dichroism spectroscopy. The interaction between the carbon dots and nucleic acids mainly occurred through groove binding and was accompanied by a slight electrostatic interaction. Carbon dots-based nucleic acid dyes, with their low cost, simple synthesis process and high stability, have opened a new path for the field of nucleic acid detection. Its research and development not only promote the frontier progress of biological science and medicine but also introduces innovative strategies and tools for scientific research and clinical practice.
研究领域:
生物化学
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2019
·
IF 3.571
Fang Zhou,Yasmina Sultanbawa,Huan Feng,Yong-Lei Wang,Qingtao Meng,Yue Wang,Zhiqiang Zhang,Run Zhang
The development of new methods for rapid and effective detection of bisulfite (HSO3–) in food samples and imaging of HSO3– intake in animals is of significant importance due to the key roles of HSO3– in food quality assurance and community health. In this work, a new responsive fluorescence probe, EQC, is reported for the quantitative detection of HSO3– in food samples and visualization of HSO3– intake in animals. Upon addition of HSO3–, the UV–vis absorption and red emission of EQC were significantly decreased within 120 s. The changes in absorption and emission spectra of EQC were rationalized by theoretical computations. The proposed reaction mechanism of EQC with HSO3– was confirmed by high-resolution mass spectrometry (HRMS) and spectroscopic titration measurements. EQC has the advantages of high sensitivity, selectivity (a detection limit of 18.1 nM), and fast response toward HSO3–, which enable rapid and effective HSO3– detection in buffer solution. The practical applications of EQC were demonstrated by the detection of HSO3– in food samples and the imaging of HSO3– intake in live animals.
研究领域:
分析化学
·
食品安全
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）