FOOD CHEMISTRY
·
2020
·
IF 6.306
Chu Zhang,Wenyan Wu,Lei Zhou,Huan Cheng,Xingqian Ye,Yong He
Black goji berry ( Lycium ruthenicum Murr.) has great commercial and nutritional values. Near-infrared hyperspectral imaging (NIR-HSI) was used to determine total phenolics, total flavonoids and total anthocyanins in dry black goji berries. Convolutional neural networks (CNN) were designed and developed to predict the chemical compositions. These CNN models and deep autoencoder were used as supervised and unsupervised feature extraction methods, respectively. Partial least squares (PLS) and least-squares support vector machine (LS-SVM) as modelling methods, successive projections algorithm and competitive adaptive reweighted sampling (CARS) as wavelength selection methods, and principal component analysis (PCA) and wavelet transform (WT) as feature extraction methods were studied as conventional approaches for comparison. Deep learning approaches as modelling methods and feature extraction methods obtained good and equivalent performances to the conventional methods. The results illustrated that deep learning had great potential as modelling and feature extraction methods for chemical compositions determination in NIR-HSI.
研究领域:
食品科学
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植物学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Ke Zhang,Zhihua Li,Wanying Zhao,Jing Guo,Sulafa B.H. Hashim,Suliman Khan,Jiyong Shi,Xiaowei Huang,Xiaobo Zou
A novel colorimetric aerogel was developed by the complexation of carboxymethyl cellulose (CMC), sodium alginate (SA), and black goji anthocyanin (BGA) followed by freeze-drying for monitoring fish (Coho salmon) freshness during storage at 4 °C and 25 °C. The various aerogels (C/S/B3:1, C/S/B2:1, C/S/B1:1, C/S/B1:2, and C/S/B1:3) externally and internally were characterized using SEM, FTIR, XRD, DSC, and TGA. Among them, the aerogel composite C/S/B1:2 exhibited the most uniform pore size, largest specific surface area, rapid color changes in various alkaline vapors (5 μM and 50 μM), and better mechanical strength. Furthermore, the colorimetric aerogel became dark blue from light purple during fish storage at temperatures of 4 °C and 25 °C when it reached pH 7.49 and 7.33, TVC 8.9 × 10 7 CFU/g and 8.5 × 10 7 CFU/g, and TVB-N 33.8 mg/100 g and 26.12 mg/100 g, respectively, indicating fish completely deteriorated. Taken together, the colorimetric aerogel composite C/S/B1:2 was promising for determining fish freshness, which could be utilized as a non-destructive and useful intelligent sensor in monitoring various fish and meat freshness and/or quality.
研究领域:
食品科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Quality and Safety
·
2020
·Vol. 4
·期 4
·193-201
·
IF 0
Liu Bei,Xu Qingqing,Sun Yujing
Goji berry tea, a traditional herbal tea, is the main ate mode of goji berry in Asia, yet few studies in comparison with red goji berry tea and black goji berry tea are carried out. This study investigated the effects of water temperature and soak time on the colour, phytochemicals, and the antioxidant capacity [2,2-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), 2,2-diphenyl-1-picrylhydrazyl radical (DPPH), and the ferric-reducing antioxidant power (FRAP)] of two goji berry tea. A comparison of the bioactive compounds and antioxidant activities between black and red goji berry tea was conducted. Results showed that both red and black goji berry tea were rich in phytochemicals, giving high antioxidant ability. The levels of bioactive compounds and the antioxidant activity of the two goji berry tea increased as the increases in soak temperature and time. Black goji berry tea had higher phytochemicals and antioxidant property than those of red goji berry tea. Infused at 100° water for the same time, the levels of total polysaccharides (150 mg/100 ml), total polyphenols (238 mg/ml), and antioxidant capacity (550 μmol/100 ml) of black goji berry tea were 3.5, 2, and 5 times higher, respectively, in comparison with red goji berry tea. The results of this study demonstrate that hot drink of goji berry in China is a good habit and black goji berry tea may be a better choice.
研究领域:
食品科学
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植物化学
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营养学
✓ 已验证
产品关联
DOI
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Yixin Suo,Li Zhou,Wanjun Long,Eric Marchioni,Minjie Zhao,Haiyan Fu,Yuanbin She
Lycium ruthenicum (Black goji berry, BGB) is a precious traditional Chinese medicine with numerous health benefits, highly sought after by consumers. However, its quality and price are greatly influenced by geographical location. Criminal adulterate such as inferior quality goji berries into genuine goji berries often occurs in the market, which results in huge economic losses. In this study, a novel method based on 3-aminobenzoic acid (PABA) modified gold nanoparticle clusters (PABA-AuNPs) was developed, utilizing noble metal nanomaterials combined with partial least squares discriminant analysis (PLS-DA) model for rapid and accurate identification of the origin of black goji berry. The recognition mechanism of this system was mainly due to the hydrogen bonding interaction between the –COO - groups on the surface of PABA and the amino acid compounds in black goji berries. This approach exhibited enhanced sensitivity, specificity, and simplicity, achieving 100% accurate identification of black goji berry origin. The successful application of PABA-AuNPs colorimetric sensing in tracing the origin of black goji berry has laid the foundation for the rapid on-site identification of the origin of other food and medicinal materials.
研究领域:
中药学
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纳米技术
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分析化学
✓ 已验证
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Huan Cheng,Wenyan Wu,Jin Chen,Haibo Pan,Enbo Xu,Shiguo Chen,Xingqian Ye,Jianle Chen
Black wolfberries ( Lycium ruthenicum Murray) establish various biological activities, owing to anthocyanins, polysaccharides, pectin and so on. However, minor appearance differences are found in black wolfberries from different geographical origins. Thus, in this study, total phenolic content (TPC), total flavonoid content (TFC) and total anthocyanin content (TAC) were determined in black wolfberries from four provinces in China (Xinjiang, Qinghai, Gansu, Ningxia Provinces) for obtaining a distinguishable chemical index. Compared with TPC and TFC, TAC largely was affected by environment conditions, and thus, it may be a good chemical marker for geographical origin identification. Then, anthocyanin profiles were analysed by ultra-performance liquid chromatography (UPLC) coupled with triple quadrupole (triple Q)-time-of-flight mass spectrometry (TOF-MS), and principal component analysis (PCA) was applied for geographical origin identification based on anthocyanin fingerprints. A total of 17 anthocyanins were tentatively determined including two new individual anthocyanins, delphinidin-3-rutinoside ( cis - p -coumaroyl)-5-O-diglucoside and delphinidin-3-rutinoside ( trans - p -coumaroyl)-5-O-diglucoside. PCA indicated that individual anthocyanin contents calculated according to HPLC data and raw HPLC data both allowed a clear separation of geographical origins of black wolfberry fruits, explaining more than 95% of information of the samples. The present study could provide a scientific guidance for distinguishing the black wolfberry from different geographical origins.
研究领域:
食品科学
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分析化学
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植物化学
·
地理标志
✓ 已验证
产品关联
DOI
高影响因子
Food and Bioprocess Technology
·
2025
·
IF 5.8
Liu Danfei,Li Xiaoxuan,Zhang Chuanxiang,Chen Yuyang,Zhou Wenxuan,Zhang Changfan
In this study, amine-responsive bilayer films (agar/black wolfberry anthocyanin (AG/BWA) and agar/black wolfberry anthocyanin/sodium alginate/hydrophobically modified TiO 2 nanoparticles (AG/BWA/HM)) were fabricated. These films consist of a sensing layer made of agar/anthocyanin and a protective layer composed of sodium alginate and hydrophobically modified TiO 2 nanoparticles (HMTI). The fabrication process involved the solvent evaporation method and screen-printing technique, with anthocyanins extracted from black wolfberry serving as the key component in the sensing layer. The prepared films were characterized by FTIR, SEM, XRD, and UV spectroscopic techniques. Water contact angle measurements showed that the AG/BWA/HM film was hydrophobic (> 90°). The incorporation of anthocyanins increased the tensile strength of the films by 6–10 MPa, the elongation at break by 3–6%, and the water solubility by 4–15% compared to control films (agar film). Light stability and storage stability tests revealed that the incorporation of hydrophobically modified TiO 2 effectively enhanced the stability of the films. When exposed to different pH values, the bilayer films showed different color changes, with a significant change from acidic to basic. The ammonia vapor test showed that the sensitivity of the AG/BWA/HM film was improved by 20.1% compared to the AG/BWA film. The indicator film was used to monitor the deterioration of pork at room temperature (25 ℃), and the color of the AG/BWA/HM film changed significantly with the increase of total volatile basic nitrogen (TVBN) of pork stored at room temperature (25 ℃) for 24 h as the freshness of pork changed gradually, indicating the promising application of this double-layer indicator film in the monitoring of meat freshness. Graphical
研究领域:
食品科学
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材料科学
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分析化学
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纳米技术
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食品安全
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高分子科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2017
·
IF 2.603
Xiudan Hou,Xiaofeng Lu,Sheng Tang,Licheng Wang,Yong Guo
An environmental friendly sorbent of polymeric ionic liquids modified graphene oxide-grafted silica (PILs@GO@Sil) was synthesized for solid-phase extraction (SPE) of phenolic acids. The sorbent was prepared via a chemical layer-to-layer fabrication including amidation reaction, surface radical chain-transfer polymerization and in situ anion exchange. After modification with PILs, the silica surface had higher positive potential so that it would exhibit stronger electrostatic interaction for acidic compounds compared with GO@Sil. The adsorption performance of phenolic acids was investigated through the theoretical calculation and static, kinetic state adsorption experiments. Under the optimized conditions, wide linear ranges were obtained with correlation coefficients ranging from 0.9912 to 0.9998, and limits of detection were in the range of 0.20–0.50 μ g L −1 . Compared with other reported methods, the proposed PILs@GO@Sil-SPE-HPLC showed higher extraction efficiency. Finally, the black wolfberry yogurt and urine were analyzed as real samples and good recoveries spiked with standard solution were obtained.
研究领域:
环境科学
·
分析化学
·
材料科学
✓ 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）