Journal ArticleDOI
A rapid and non-invasive method for the classification of natural tannin extracts by near-infrared spectroscopy and PLS-DA
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TLDR
In this paper, 49 samples of vegetable tannin extracts, representing six commercially available types, were analyzed by near infrared and multivariate analyses (HCA and PLS-DA).Abstract:
Vegetable tannins are plant extracts that have traditionally been used to tan leather. These extracts are polyphenolic compounds that are widely distributed in plants and have the ability to precipitate proteins since their structures are rich in hydroxyls. Tannins can be classified into two groups: the hydrolyzable tannins and the proanthocyanidins, also called condensed tannins. In this study, 49 samples of vegetable tannin extracts, representing six commercially available types, were analyzed by near infrared and multivariate analyses (HCA and PLS-DA). The first derivative of the NIR spectra proved useful in the differentiation of the extracts, as it provided information on the main absorption bands, which are related to the chemical composition and structure. A well-defined separation between condensed (quebracho and mimosa) and hydrolyzable tannins (tara, myrobalan, chestnut and valonea) was observed by HCA (unsupervised method). The PLS-DA supervised method showed excellent results regarding classification, with a sensitivity and specificity of 100%. From the results, we concluded that this method may be useful for the quality control of commercial tannins and correct identification, as well as in mitigating fraud since other extracts and products can also be detected.read more
Citations
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Journal ArticleDOI
Rapid authentication of starch adulterations in ultrafine granular powder of Shanyao by near-infrared spectroscopy coupled with chemometric methods.
TL;DR: Results show that the combination of NIR spectroscopy and chemometric methods offers a simple, fast and reliable method for the classification and quantification of the ultrafine granular powder of the herb.
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Near infrared spectroscopy combined with chemometrics for growth stage classification of cannabis cultivated in a greenhouse from seized seeds.
Bruna Tassi Borille,Marcelo Caetano Alexandre Marcelo,Rafael S. Ortiz,Kristiane de Cássia Mariotti,Marco Flôres Ferrão,Renata Pereira Limberger +5 more
TL;DR: The growth stage of cannabis can be predicted by NIR spectroscopy and chemometric tools in the early stages of indoor cannabis cultivation in Brazil.
Journal ArticleDOI
Quality Assessment of Gentiana rigescens from Different Geographical Origins Using FT-IR Spectroscopy Combined with HPLC.
TL;DR: The results indicated that PLS-DA model could efficiently discriminate G. rigescens from different geographical origins and implied that geographical origins variation of root samples were more obvious than that of stems and leaves.
Journal ArticleDOI
A review on the application of vibrational spectroscopy to the chemistry of nuts.
TL;DR: In this paper, a review on the application of vibrational spectroscopy, infrared and Raman, to nuts characterization is presented, where several qualitative and quantitative parameters, origin authentication and/or adulteration in almonds, peanuts, pine nuts, hazelnuts, walnuts, Brazil nuts, cashews, chestnuts and pistachios are covered.
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The Effects of Tannins in Monogastric Animals with Special Reference to Alternative Feed Ingredients.
Zahra Mohammed Hassan,Tlou Grace Manyelo,Tlou Grace Manyelo,Letlhogonolo Andrew Selaledi,Letlhogonolo Andrew Selaledi,M. Mabelebele +5 more
TL;DR: It can be concluded that the level of inclusion of tannins in diets will depend on the type of ingredient and the animal species; furthermore, these need to be cost-effective.
References
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Journal ArticleDOI
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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.
Journal ArticleDOI
Technology development for the production of biobased products from biorefinery carbohydrates—the US Department of Energy’s “Top 10” revisited
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Computer Aided Design of Experiments
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TL;DR: A computer oriented method which assists in the construction of response surface type experimental plans takes into account constraints met in practice that standard procedures do not consider explicitly.
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Plant Polyphenols: Chemical Properties, Biological Activities, and Synthesis
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