The Study of Adsorption Kinetics of Flavan-3-Ols, Dihydrochalcones and Anthocyanins onto Barley β-Glucan

Polyphenols can interact with dietary fibers and these interactions can affect polyphenols bioactivities. The interactions can be studied with the adsorption process, and adsorptions of flavan-3-ols (procyanidin B1, procyanidin B2), dihydrochalcones (phloretin, phloretin-2-glucoside), and anthocyanins (cyanidin-3-glucoside, cyanidin-3-galactoside) onto β-D-glucan from barley were studied in this work. The intention was to reveal the kinetics of the adsorption process. Adsorption was carried out using model solutions at room temperature. The results showed that in the flavan-3-ol group procyanidin B1 showed higher adsorption capacity than procyanidin B2. Phloretin showed a higher adsorption capacity than phloretin-2-glucoside in the dihydrochalcone group and anthocyanins showed similar adsorption capacities. Parameter k1 for all polyphenols was in the range from 0.30 h−1 to 0.93 h−1. Adsorption capacity qe for all polyphenols ranged from 2.90 mmol g−1 to 9.76 mmol g−1, parameter k2 was in the range 70− 225 g mol−1 h−1, and adsorption capacities qe ranged from 3.70 mmol g−1 to 9.90 mmol g−1

Bisphenol A – an Environmental and Human Threat

Bisphenol A (BPA) is a chemical substance primarily used as a plasticizer in food packaging production. Unfortunately, it has become a ubiquitous environmental pollutant. The main route for human exposure is the consumption of contaminated food and beverages. Contamination can occur during the production and transport, or due to unsuitable storage conditions; but most common, the contamination is a result of leaching from the packaging containing BPA. Excess exposure to BPA is associated with various health conditions, including cardiovascular disorders, diabetes, various types of cancer, hepatotoxicity, and metabolic and immune function. Literature indicates disrupted endocrine activity and reproductive problems as the main health concerns in humans. The aim of this paper is to review and critically discuss the literature that relates occurrence of BPA in food/beverages and adverse effects on human health, and to point out the most relevant discoveries. So far, BPA has not been found in unprocessed food, which means that it originates from food and beverage packaging, especially from plastic packaging and cans. The migration of BPA from packaging increases during exposure to sunlight and higher temperatures. In addition to food and beverages, people are exposed to BPA through equipment used in medical treatments. Therefore, there is a strong need for better and evidence-based recommendations and regulations related to BPA

Computer Assisted Method Development in Liquid Chromatography

This paper describes potential applications of computer-assisted chemometrics in method devel-opment in liquid chromatography. These include modeling of retention (isocratic, gradient, molecular modeling, artificial neural networks), assessment of separation (peak capacity), single and multiple objective optimization approach, advanced optimization algorithms (genetic algorithms, simulated annealing) and method transfer issues (transfer of methods between instruments and / or laboratories). Selected topics provide an accessible source of information needed for successful increase of chromatographic efficiency and economic feasibility (higher sample throughput) in liquid chromatography

Bisphenol A – an Environmental and Human Threat

Bisphenol A (BPA) is a chemical substance primarily used as a plasticizer in food packaging production. Unfortunately, it has become a ubiquitous environmental pollutant. The main route for human exposure is the consumption of contaminated food and beverages. Contamination can occur during the production and transport, or due to unsuitable storage conditions; but most common, the contamination is a result of leaching from the packaging containing BPA. Excess exposure to BPA is associated with various health conditions, including cardiovascular disorders, diabetes, various types of cancer, hepatotoxicity, and metabolic and immune function. Literature indicates disrupted endocrine activity and reproductive problems as the main health concerns in humans. The aim of this paper is to review and critically discuss the literature that relates occurrence of BPA in food/beverages and adverse effects on human health, and to point out the most relevant discoveries. So far, BPA has not been found in unprocessed food, which means that it originates from food and beverage packaging, especially from plastic packaging and cans. The migration of BPA from packaging increases during exposure to sunlight and higher temperatures. In addition to food and beverages, people are exposed to BPA through equipment used in medical treatments. Therefore, there is a strong need for better and evidence-based recommendations and regulations related to BPA