JOURNAL OF CHROMATOGRAPHY A
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2014
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IF 4.258
Chun Wang,Ruiyang Ma,Qiuhua Wu,Meng Sun,Zhi Wang
In this paper, porous carbon with a highly ordered structure was synthesized using zeolite ZSM-5 as a template and sucrose as a carbon source. Through the in situ reduction of Fe 3+ , magnetic property was successfully introduced into the ordered porous carbon, resulting in a magnetic porous carbon (MPC). MPC was used as an adsorbent for the extraction of some chlorophenols (2-chlorophenol, 3-chlorophenol, 2,3-dichlorophenol and 3,4-dichlorophenol) from water and peach juice samples followed by high performance liquid chromatography-ultraviolet detection. Good linearity was observed in the range 1.0–100.0 ng mL −1 and 2.0–100.0 ng mL −1 for water and peach juice sample, respectively. The limits of detection ( S / N = 3) were between 0.10 and 0.30 ng mL −1 . The relative standard deviations were less than 5.3% and the recoveries of the method for the compounds were in the range from 87.8% to 102.3%. The results demonstrated that the MPC had a high adsorptive capability toward the four chlorophenols from water and peach juice samples.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2020
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IF 3.594
Lu Xu,Qiong Shi,Daowang Lu,Liuna Wei,Hai-Yan Fu,Yuanbin She,Shunping Xie
The feasibility of simultaneous detection of multiple cheap materials in kiwifruit juice (KFJ) was studied by two fluorescent methods and chemometrics. Because the actual frauds usually involve many known and unknown adulterants, the traditional methods to detect one or more known components are insufficient to identify adulterated KFJ. Therefore, class models of pure KFJ were established using one-class partial least squares (OCPLS) to perform untargeted analysis. To enhance the detection specificity, traditional and double-quantum-dots enhanced fluorescent spectroscopic techniques were combined to characterize pure and adulterated KFJ. By data fusion and using standard normal variables (SNV) transformation, OCPLS model with sensitivity of 0.929 was obtained. The proposed method could detect adulterations of 2% (w/w) or more syrup and artificial fruit powder. The fusion of traditional and quantum dots enhanced fluorescence was demonstrated to provide a rapid and highly sensitive method for untargeted analysis of adulterated KFJ.
研究领域:
食品科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Microbiology
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2023
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IF 5.2
Wang Jun,Wei Bo-Cheng,Wang Xin,Zhang Yan,Gong Yun-Jin
Sweet cherries are popular among consumers, with a recent explosion in sweet cherry production in China. However, the fragility of these fruits poses a challenge for expanding production and transport. With the aim of expanding the product categories of sweet cherries that can bypass these challenges, in this study, we prepared sweet cherry juice fermented by three different lactic acid bacteria (LAB; Lactobacillus acidophilus, Lactobacillus plantarum, and Lactobacillus rhamnosus GG), and evaluated the growth, physiochemical, and aroma characteristics. All three strains exhibited excellent growth potential in the sweet cherry juice; however, Lactobacillus acidophilus and Lactobacillus plantarum demonstrated more robust acid production capacity and higher microbial viability than Lactobacillus rhamnosus GG. Lactic acid was the primary fermentation product, and malic acid was significantly metabolized by LAB, indicating a transition in microbial metabolism from using carbohydrates to organic acids. The aroma profile was identified through integrated analysis of electronic nose (E-nose) and headspace gas chromatography–ion mobility spectrometry (HS-GC–IMS) data. A total of 50 volatile compounds characterized the aromatic profiles of the fermented juices by HS-GC–IMS. The flavor of sweet cherry juice changed after LAB fermentation and the fruity odor decreased overall. Lactobacillus acidophilus and Lactobacillus plantarum significantly increased 2-heptanone, ethyl acetate, and acetone contents, bringing about a creamy and rummy-like favor, whereas Lactobacillus rhamnosus GG significantly increased 2-heptanone, 3-hydroxybutan-2-one, and 2-pentanone contents, generating cheesy and buttery-like odors. Principal component analysis of GC–IMS data and linear discriminant analysis of E-nose results could effectively differentiate non-fermented sweet cherry juice and the sweet cherry juice separately inoculated with different LAB strains. Furthermore, there was a high correlation between the E-nose and GC–IMS results, providing a theoretical basis to identify different sweet cherry juice formulations and appropriate starter culture selection for fermentation. This study enables more extensive utilization of sweet cherry in the food industry and helps to improve the flavor of sweet cherry products.
研究领域:
食品科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL DAIRY JOURNAL
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2025
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IF 3.4
Xiaoyan Feng,Donggen Zhou,Guoyang Xie,Hengyi Xu
In contaminated food, Staphylococcus aureus is a threat to human health because it can produce enterotoxins and cause various diseases, therefore, it is important to establish a fast, accurate method to detect S. aureus . In our study, recombinase aided amplification (RAA) combined with lectin-magnetic separation (LMS) was applied to detect S. aureus in skim milk and peach juice. The streptavidin-conjugated magnetic beads (MBs-SA) characterized by Fourier Transform Infrared Spectrometer was used to capture S. aureus . The performance of LMS strategy to capture S. aureus was verified by scanning electron microscope and capture efficiency was obtained in various concentrations of bacteria. The limit of detection (LOD) of this RAA-LMS assay for S. aureus was 3.6 × 10 1 CFU/mL in pure culture, 4.4 × 10 5 CFU/mL in spiked skim milk and 1.15 × 10 3 CFU/mL in spiked juice. Compared with PCR-LMS method, the LOD for RAA-LMS assay was lower, and its sensitivity was improved by three orders of magnitude. Moreover, the detection time of this RAA-LMS method was shorter than that of the standard cultural method. In conclusion, the proposed RAA-LMS assay had a great potential for the rapid and accurate detection of S. aureus .
研究领域:
微生物学
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食品安全
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分子诊断
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食品科学
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生物检测技术
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2017
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IF 5.951
Meng Li Liu,Bin Bin Chen,Rong Sheng Li,Chun Mei Li,Hong Yan Zou,Cheng Zhi Huang
Dendritic copper selenides (CuSe) with hierarchical side-branches are synthesized on a large scale through a one-pot rapid, facile, and green hydrothermal route in which natural kiwi juice is employed as the reducing and coating reagent. Importantly, the CuSe have high specific surface area and excellent photocatalytic activity toward model dye malachite green (MG). The degradation rate of MG on the dendritic CuSe reaches 97% within 30 min under natural daylight irradiation. The high degradation capabilities are mainly attributed to a synergetic effect of the hierarchical side-branched structure with the strong adsorption of MG and the natural daylight-driven photocatalytic activity producing highly reactive oxygen. Thus, the dendritic CuSe will have a broad application prospect, which can be used for the treatment of the dye-contaminated wastewater.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）