INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xinru Wen,Yixiang Zhen,Ruizhi Yang,Huimin Gao,Nasra Seif Juma,Liang Bai,Yan Chen,Yadong Zhao
In this study, an ultra-light porous aerogel was synthesized utilizing Blueberry anthocyanin (BA) and cellulose nanofibrils (CNF), and the freshness of shrimp was assessed through the colorimetric response of the aerogel. Through modification by Vinyltrimethoxysilane (VTMO), the aerogel's surface properties were altered from hydrophilic to hydrophobic, thereby enhancing its practicality in wet environments. By adjusting the concentrations and ratios of BA and CNF, key physical characteristics such as density, porosity, and specific surface area of the aerogel can be precisely controlled. These properties influence the aerogel's capacity to adsorb gases, thereby affecting its color change reversibility, sensitivity, and stability. Among all aerogels with varying proportions of BA/CNF (1:2, 1:3 and 1:4), the one prepared with a ratio of 1:3 (BA/CNF 1:3 aerogel) exhibited a high porosity and specific surface area, demonstrating exceptional sensitivity to alkaline gases and remarkable stability under light conditions. The detection limits of total volatile basic nitrogen (TVB-N) in BA/CNF 1:3 aerogel for detecting shrimp meat spoilage were 20.02 mg/100 g at 4 °C and 29.87 mg/100 g at 25 °C respectively. This kind of composite aerogel could be used for sensitive and visual monitoring of shrimp freshness, thereby reducing food waste and offering a novel approach to intelligent development within the food packaging industry.
研究领域:
食品科学
·
材料科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Future Foods
·
2023
·
IF 0
Yanan Liu,Huan Li,Jian Chen,Jiesi Feng,Renjie Lian,Linglin Fu,Yanbo Wang
ABSTRACT Indicating hydrogels have shown the advantages of being fast, sensitive, and real-time in demonstrating the freshness of aquatic products due to their noticeable color change. In this work, an anti-freezing hydrogel embedded with pH-sensitive alizarin was developed as an original colorimetric indicator for monitoring the corruption of aquatic products at low temperatures. The anti-freezing hydrogel was prepared from 2-carboxyethyl acrylate, [2-(methacryloyloxy)ethyl]-trimethylammonium chloride, and 2-hydroxyethyl methacrylate monomers with triethylene glycol dimethacrylate as cross-linking agent. The hydrogel showed excellent anti-freezing capability, which was further incorporated with the pH-sensitive dye alizarin to gain the indicating capability. When applied in the indication of the freshness of salmon under low-temperature storage, it was found that the color changes of the indicator corresponded with the total volatile basic nitrogen contents of salmon, the correlation coefficient of which was 0.959 6. These results indicated the application potential of the hydrogels as freshness indicators during low-temperature storage or cold-chain transportation.
研究领域:
材料科学
·
食品科学
·
化学工程
✓ 已验证
DOI
FOOD CONTROL
·
2024
·
IF 5.6
Xiaoxiao Wu,Suleiman A. Haruna,Nazhi Lv,Fangling Jiang,Yu Xia,Qingguo Cai,Qingmin Chen,Xiaomei Chen,Tianhui Jiao,Quansheng Chen
The identification of white tea mainly relies on sensory evaluation and mass spectrometry methods, which have drawbacks such as strong subjectivity and complex analysis. Thus, this study established a novel approach based on colorimetric indicator displacement assay (IDA) sensor to achieve rapid and accurate white tea identification. Cost-effective dyes and phenylboronic acids with different substituents were selected as the indicator and receptor, respectively. A color-signal-responsive IDA sensor array was constructed to enable the rapid and sensitive identification of white tea. Additionally, three supervised pattern recognition algorithms were utilized to process image data. The results demonstrate that combining the IDA sensor with the random forest algorithm accurately differentiates white tea samples by origin and type, achieving a 100% recognition accuracy in both training set (n = 84) and prediction set (n = 56) when ntree = 1000. This work offers an economical and efficient method for the rapid identification of white tea products.
研究领域:
食品科学
·
分析化学
·
机器学习
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2023
·Vol. 12
·期 21
·3964
·
IF 5.2
Zhepeng Zhang,Haiqing Tang,Keyan Cai,Ruiping Liang,Li Tong,Changrong Ou
An intelligent indicator was developed by immobilizing bromocresol green (BCG) within the polyacrylamide (PAAm) hydrogel matrix to monitor the total volatile basic nitrogen (TVB-N) content of fish. The FTIR analysis indicated that BCG was effectively incorporated into the PAAm through the formation of intermolecular hydrogen bonds. A thermogravimetric analysis (TGA) showed that the PAAm/BCG indicator had a mere 0.0074% acrylamide monomer residue, meanwhile, the addition of BCG improved the thermal stability of the indicator. In vapor tests with various concentrations of trimethylamine, the indicator performed similarly at both 4 °C and 25 °C. The total color difference values (ΔE) exhibited a significant linear response to TVB-N levels ranging from 4.29 to 30.80 mg/100 g at 4 °C (R2= 0.98). Therefore, the PAAm/BCG indicator demonstrated stable and sensitive color changes based on pH variations and could be employed in smart packaging for real-time assessment of fish freshness.Keywords:TVB-N;polyacrylamide hydrogel;bromocresol green;colorimetric indicator;intelligent packaging
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Gels
·
2025
·Vol. 11
·期 9
·697
·
IF 5.3
Ningli An,Jiwen Liu,Wentao Zhou,Qing He,Jianan Li,Yali Xiong
Biological hydrogels are widely available in terms of raw material sources and can be processed and molded using relatively simple techniques. Hydrogels can offer abundant three-dimensional, water-containing channels that facilitate the reaction between gases and dye, making them the preferred choice for the solid support layer in colorimetric indicators. However, biomass hydrogels exhibit inferior mechanical properties, making them unsuitable for large-scale manufacturing processes. In this study, four dual-network composite hydrogels Agar/Gelatin, Sodium Alginate/Agar, Sodium Alginate/Poly (vinyl alcohol), Sodium Alginate/Gelatin (AG/Gel, SA/AG, SA/PVA and SA/Gel) prepared through hybrid strategies. Furthermore, the influence of the dual-network structure on the mechanical properties and ammonia response was systematically investigated, using microscopy and Fourier transform infrared spectroscopy (FTIR) characterization method. The experimental results demonstrate that the incorporation of SA into original hydrogel matrices can significantly enhance both the mechanical and ammonia response performance due to the secondary topological network structure. The interpenetrating double network structure was effectively regulated through the calcium ion cross-linking process. The color difference threshold of SA/PVA’s response to ammonia gas is 10, it holds promise for rapid detection applications. The SA/Gel composite hydrogel exhibits excellent mechanical robustness and toughness. The tensile strength of the SA/Gel sample is 11 times that of a single gel, and the toughness is 80 times greater, suggesting its suitability for large-scale manufacturing of colorimetric indicator.
研究领域:
材料科学
·
高分子化学
·
传感器技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Fang Li,Xu Wang,Jiachang Liu,Yuting Hu,Jianbo He
In this work, a double-layered microfluidic paper-based device (μPAD) with multiple colorimetric indicators was presented for the sensitive simultaneous detection of four kinds of small biomolecules, including glucose, uric acid, lactate, and choline in mixture. The double-layered μPAD were composed of the top detection layer and the bottom auxiliary layer to construct 3D microfluidic channels. The detection zones on the top detection layer were modified with various colorimetric reagents, different kinds of oxidase (glucose oxidase, uricase, lactate oxidase or choline oxidase) and horseradish peroxidase (HRP). The immobilized chromogenic reagents could be oxidized by the generated H 2 O 2 from the specific enzymatic reactions between the oxidases and their corresponding substrates to form different colored products with co-immobilized HRP as catalyst. As a result, four linear calibration curves were obtained for the determination of glucose (0.01–10.0 mmol/L), uric acid (0.01–5.0 mmol/L), lactate (0.04–10.0 mmol/L), and choline (0.04–24.0 mmol/L), respectively. The proposed double-layered μPAD with multiple colorimetric indicators exhibited good colorimetric performance, effectively improved sensitivity, and extended linear range, which was further applied to the simultaneously determination of glucose, uric acid, lactate, and choline in serum samples.
研究领域:
分析化学
·
生物传感器
·
微流控技术
·
生物医学工程
✓ 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）