Journal ArticleDOI
Detection of theaflavins in black tea using a molecular imprinted polyacrylamide-graphite nanocomposite electrode
Trisita Nandy Chatterjee,Runu Banerjee Roy,Bipan Tudu,Panchanan Pramanik,Himangshu Deka,Pradip Tamuly,Rajib Bandyopadhyay,Rajib Bandyopadhyay +7 more
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TLDR
In this paper, the authors reported a facile and convenient approach for the synthesis of a molecular imprinted electrode for detecting total theaflavin (TF), an important chemical constituent of black tea.Abstract:
In this work, we report a facile and convenient approach for the synthesis of a molecular imprinted electrode for detecting total theaflavin (TF), an important chemical constituent of black tea. The proposed electrode is prepared from co-polymer of acrylamide and divinylbenzene along with graphite and it is imprinted with TF. The molecular imprinted polymer (MIP) is characterized by fourier transform infra-red (FTIR) and field emission scanning electron microscope (FESEM) techniques. Cyclic voltammetric and differential pulse voltammetry analysis were performed in order to study the performance of the electrode. The MIP electrode is found to have a good detection limit of 14 μΜ (S/N = 3) and a linear range of 20–100 μΜ. The electrode also showed an excellent selectivity and sensitivity to TF from its structural analogues. The analytical performance of the MIP electrode has been observed to be reasonably good and has adequate repeatability and reproducibility. The proposed electrode is employed to determine the TF content in black tea samples by correlating with HPLC data using partial least square regression technique and a prediction accuracy of 94% is obtained.read more
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Volatile organic compounds gas sensor based on quartz crystal microbalance for fruit freshness detection: A review.
Kewei Liu,Chao Zhang +1 more
TL;DR: The state of the art of gas sensors based on quartz crystal microbalance (QCM) for fruit freshness detection is overviewed from the aspects of development history, working principle, selection and modification of sensitive materials, and volatile organic compounds detection of fruits.
Journal ArticleDOI
Molecularly imprinted polymers - towards electrochemical sensors and electronic tongues
TL;DR: In this paper, the authors provide an overview of the more common synthetic approaches, as well as the strategies that can be used to achieve the integration of molecular imprinted polymers and electrochemical sensors, followed by some recent examples over different areas.
Journal ArticleDOI
Rapid sensing of total theaflavins content in black tea using a portable electronic tongue system coupled to efficient variables selection algorithms
Qin Ouyang,Qin Ouyang,Yongcun Yang,Jizhong Wu,Zhengquan Liu,Chen Xiaohong,Chunwang Dong,Quansheng Chen,Quansheng Chen,Zhengzu Zhang,Zhiming Guo +10 more
TL;DR: In this article, a portable electronic tongue based on glassy carbon electrode and cyclic voltammetry combined with variable selection algorithm Si-CARS-PLS, proved a promising, rapid and cost-effective method to measure the total theaflavins content in black tea.
Journal ArticleDOI
Trends of tea in cardiovascular health and disease: A critical review
TL;DR: This review provided a timely up-to-date overview of the cardiovascular benefits and molecular mechanisms of tea and its vasoactive components in cardiovascular health and diseases and emphasizes the importance of tea drinking as part of lifestyle modification in cardiovascular disease prevention.
Journal ArticleDOI
In-site synthesis molecular imprinting Nb2O5 -based photoelectrochemical sensor for bisphenol A detection.
TL;DR: This method combining molecular imprinting technique with photoelectrochemical detection measurement made a successful attempt to detect BPA and supplied a promising way to detect other environment pollutions rapidly and selectively in the future.
References
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Journal ArticleDOI
PLS-regression: a basic tool of chemometrics
TL;DR: PLS-regression (PLSR) as mentioned in this paper is the PLS approach in its simplest, and in chemistry and technology, most used form (two-block predictive PLS) is a method for relating two data matrices, X and Y, by a linear multivariate model.
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The Role of Tea in Human Health: An Update
TL;DR: In vitro and animal studies provide strong evidence that tea polyphenols may possess the bioactivity to affect the pathogenesis of several chronic diseases, especially cardiovascular disease and cancer, but international correlations do not support this relationship.
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Cross-validation pitfalls when selecting and assessing regression and classification models
TL;DR: An algorithm for repeated grid-search V-fold cross-validation for parameter tuning in classification and regression, and a repeated nested cross- validation algorithm for model assessment are described and evaluated.
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Overview of antibacterial, antitoxin, antiviral, and antifungal activities of tea flavonoids and teas
TL;DR: This overview surveys and interprets the present knowledge of activities of tea flavonoids and teas against foodborne and other pathogenic bacteria, virulent protein toxins produced by some of the bacteria,virulent bacteriophages, pathogenic viruses and fungi and the synergistic, mechanistic, and bioavailability aspects of the antimicrobial effects.
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A review of latest research findings on the health promotion properties of tea
TL;DR: Experimentation with new accurate tools provide useful information about the metabolism of tea components in the body, their mode of action as antioxidants at the cellular level and their protective role in the development of cancer, cardiovascular disease and other pathologies.