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Sandra Rodrigues

Bio: Sandra Rodrigues is an academic researcher from University of Queensland. The author has contributed to research in topics: Coal & Maceral. The author has an hindex of 26, co-authored 114 publications receiving 2574 citations. Previous affiliations of Sandra Rodrigues include University of Santiago de Compostela & University of Porto.
Topics: Coal, Maceral, Inertinite, Vitrinite, Coal mining


Papers
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Journal ArticleDOI
TL;DR: In the ICCP System 1994, the maceral group huminite has been revised from the previous classification (ICCP, 1971) to accommodate the nomenclature to changes in the other maceral groups.

688 citations

Journal ArticleDOI
TL;DR: All the samples exhibited antimutagenic activity, even though some samples were more effective in decreasing the number of gene conversion colonies and mutant colonies, and the anti-inflammatory activity, assessed using the hyaluronidase enzyme, was highest in samples B and D.

264 citations

Journal ArticleDOI
TL;DR: The phenolic profile, the in vitro antimicrobial activity and effect in the hyaluronidase enzyme of propolis harvested in Portugal was evaluated and Candida albicans was the most resistant and Staphylococcus aureus the most sensitive.

206 citations

Journal ArticleDOI
TL;DR: The studied pollens are nutritionally well balanced, and contain high levels of moisture, proteins, fat, energy, ash, carbohydrates, reducing sugars, essential n-3 fatty acids and good ratios of polyunsaturated fatty acids (PUFA)/s saturated fatty acids.
Abstract: Bee pollen is one of the richest and purest natural foods, used in the folk medicine, clinical practices, and food and pharmaceutical industries. This work aims to characterise, for the first time in Portugal, the palynological origin, nutritional value and microbiological safety of this beehive product. It identified ten botanical families, and the more frequent were Boraginaceae and Ericaceae. We have evaluated the water content, a w, pH, reducing sugars, ash, carbohydrate, proteins, lipids, fatty acids and energy. The microorganisms studied were the aerobic mesophiles, moulds and yeasts, faecal coliforms, Escherichia coli, Staphylococcus aureus, Salmonella and sulphite-reducing clostridia. The studied pollens are nutritionally well balanced, and contain high levels of moisture, proteins, fat, energy, ash, carbohydrates, reducing sugars, essential n-3 fatty acids and good ratios of polyunsaturated fatty acids (PUFA)/saturated fatty acids. In fact, the PUFA represent 66% of the total fatty acids. The samples had good microbiological quality, as none of the samples had toxigenic species. © 2011 Institute of Food Science and Technology.

133 citations

Journal ArticleDOI
TL;DR: In this article, micro-Raman spectroscopy was conducted on coal bulk samples and on individual coal macerals (collotelinite, fusinite, and macrinite) from a set of Penn State Coal Bank coals of increasing rank to study the variation of their spectral parameters with rank, and considering coal heterogeneity.

132 citations


Cited by
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Journal ArticleDOI

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08 Dec 2001-BMJ
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

33,785 citations

01 Jan 2016
TL;DR: The modern applied statistics with s is universally compatible with any devices to read, and is available in the digital library an online access to it is set as public so you can download it instantly.
Abstract: Thank you very much for downloading modern applied statistics with s. As you may know, people have search hundreds times for their favorite readings like this modern applied statistics with s, but end up in harmful downloads. Rather than reading a good book with a cup of coffee in the afternoon, instead they cope with some harmful virus inside their laptop. modern applied statistics with s is available in our digital library an online access to it is set as public so you can download it instantly. Our digital library saves in multiple countries, allowing you to get the most less latency time to download any of our books like this one. Kindly say, the modern applied statistics with s is universally compatible with any devices to read.

5,249 citations

Journal ArticleDOI
01 Nov 2009
TL;DR: A data mining approach to predict human wine taste preferences that is based on easily available analytical tests at the certification step is proposed, which is useful to support the oenologist wine tasting evaluations and improve wine production.
Abstract: We propose a data mining approach to predict human wine taste preferences that is based on easily available analytical tests at the certification step. A large dataset (when compared to other studies in this domain) is considered, with white and red vinho verde samples (from Portugal). Three regression techniques were applied, under a computationally efficient procedure that performs simultaneous variable and model selection. The support vector machine achieved promising results, outperforming the multiple regression and neural network methods. Such model is useful to support the oenologist wine tasting evaluations and improve wine production. Furthermore, similar techniques can help in target marketing by modeling consumer tastes from niche markets.

1,121 citations

Journal ArticleDOI
TL;DR: In this article, the effects of protein-phenolic interactions under various conditions on protein and phenolic compound's structure and functionality are described, including temperature, pH, protein type and concentration, and the type and structure of phenolic compounds.

856 citations

Journal ArticleDOI
TL;DR: This review focuses on the biotransformation of polyphenols by gut microbiota, modulation of gut microbiota bypolyphenols, and the effects of these two-way mutual interactions on polyphenol bioavailability, and ultimately, human health.
Abstract: As of late, polyphenols have increasingly interested the scientific community due to their proposed health benefits. Much of this attention has focused on their bioavailability. Polyphenol–gut microbiota interactions should be considered to understand their biological functions. The dichotomy between the biotransformation of polyphenols into their metabolites by gut microbiota and the modulation of gut microbiota composition by polyphenols contributes to positive health outcomes. Although there are many studies on the in vivo bioavailability of polyphenols, the mutual relationship between polyphenols and gut microbiota is not fully understood. This review focuses on the biotransformation of polyphenols by gut microbiota, modulation of gut microbiota by polyphenols, and the effects of these two-way mutual interactions on polyphenol bioavailability, and ultimately, human health.

527 citations