Artykuły (WBiNoŻ)
Stały URI dla kolekcjihttp://hdl.handle.net/11652/147
Przeglądaj
14 wyniki
collection.search.results.head
Pozycja Antioxidant Potential and Phytochemical Content of Selected Fruits and Vegetables Consumed in Cyprus(Wydawnictwo Politechniki Łódzkiej, 2018) Georgiadou, Egli C; Goulas, Vlasios; Majak, Iwona; Ioannou, Antigoni; Leszczyńska, Joanna; Fotopoulos, VasileiosConsuming a diet high in fruits and vegetables can lower the risk of developing numerous chronic diseases, including cancer and cardiovascular disease, due to the presence of multiple antioxidants. Horticultural produce consumed in Cyprus include a large variety of fruits and vegetables, most of which are common components of a Mediterranean-style diet due to the island’s localization. The aim of the present study was to evaluate the antioxidant composition and activity of the edible portion of ten fruits and ten vegetables commonly consumed in Cyprus. Total phenolics, anthocyanins, ascorbic acid and carotenoids contents were determined, while the in vitro antioxidant activity was evaluated by three assays. Antioxidant activity showed great variation, with the highest values found in green olives, capers and red chili peppers and in correlation with total phenolic content. Ascorbic acid was detected in large quantities in parsley, coriander, red guavas and red chili peppers, while red chili peppers, capers and coriander had high levels of carotenoids. Furthermore, sweet cherries, red grapes, and red apples contained significant amounts of anthocyanins. Statistical analysis revealed that phenolic compounds are the most potent antioxidants in fruit and vegetables, while total anthocyanins had a weak contribution to their antioxidant activity. The present study could be a guide for Cypriot as well as Mediterranean diet health-conscious consumers to select specific fruits and vegetables as dietary components. To the best of our knowledge, this is the first study thoroughly describing the antioxidant composition and activity of a wide array of important Cypriot horticultural products.Pozycja The determination of potentially allergenicity of selected herbs(Wydawnictwo Politechniki Łódzkiej, 2019) Aninowski, Mateusz; Leszczyńska, JoannaThe aim of the research was to compare the content of allergens in herbs from the Lamiaceae (basil, oregano) and Apiaceae (cumin, fennel, parsley, anise, coriander) family. Herbal plants from conventional and organic crops were subjected to research. In the extracts of herbs, the content of protein as well as the content of Bet v I analogs and profilin were determined using the immunoenzymatic indirect method.Protein content in conventional crops determined by the Bradford method ranges between 160-204 mg/g, and Pierce determined between 105-394 mg/g. In samples of organic herbs the results are as follows: Bradford method 149-196 mg/g, and Pierce method 109-333 mg/g. In the case of plants grown using conventional methods, the content of Bet v I analogues, based on a commercial test, ranged from 0.5 to 1.15 μg/g in method I, whereas in the method developed by us from 0.22 to 0.68 μg/g. In herbs from organic farming, the range of results according to the commercial test is 0.86-1.54 mg/g, and use by the test we developed 0.5-0.63 mg/g. The results of profilin content were as follows: in samples grown with conventional methods, they ranged from 1.00 to 18.13 ng/g, while organics - from 3.27 to 12.62 ng/g. The calculated p-value is less than the assumed α = 0.05, – this result is statistically significant.The correlation between the results of the method I and II in both crops is strongly statistically significant.Pozycja 5-hydroxymethylfurfural content in selected gluten- and gluten-free cereal food products(Lodz University of Technology Press, 2017) Mańkowska, Dorota; Majak, Iwona; Bartos, Adrian; Słowianek, Marta; Łącka, Agata; Leszczyńska, Joanna5-Hydroxymethylfurfural (HMF) was determined with HPLC method in forty one food samples, including gluten-free, breakfast cereals and bakery products. The highest concentration of HMF was found in wheat bread with cranberries (210 mg kg-1) and in breakfast cereals – honey wheat loops (85.099 mg kg-1). In contrast, wholegrain oatmeal and gluten-free sponge cakes had the lowest HMF level of all tested samples, below the detection limit and 0.485 mg kg-1, respectively. In most cases, lack of gluten coincided with the lowest HMF content readings (average 8.488 mg kg-1). The impact of the type of sugar, especially glucose, on the HMF concentration in food is apparent. Sweetened breakfast cereals, with the average content of HMF at 25.55 mg kg-1, took lead over dietary products (8.488 mg kg-1) and bakery products (18.395 mg kg-1), with the exception for wheat bread with cranberries. These cereals contained glucose or glucose-fructose syrup.Pozycja Antioxidants as a defensive shield in thyme (Thymus vulgaris L.) grown on the soil contaminated with heavy metals(Lodz University of Technology Press, 2016) Kubalt, Kamila; Leszczyńska, JoannaThe objective of this study was to investigate the effect of excessive concentration of selected heavy metals - nickel, copper and zinc on aromatic plants Thymus vulgaris. The present work examines the concentration of phenolic compounds, total antioxidant capacity and flavonoids content in leaves obtained from plants Thymus vulgaris grown on the soil contaminated with different concentration of these heavy metals. It was assumed, that selected metals, playing the role of micronutrients, cause toxic effect in their excessive concentrations, inhibit the growth and development of plants. Adverse impact on the plant is most likely due to the oxidative stress at a cellular level. It was demonstrated, that the lowest applied concentrations of heavy metals lead to the increased antioxidant content, which then decreases with increasing metal concentrations.Pozycja Accumulation of metal ions in selected plants from Brassicaceae and Lamiaceae families(Lodz University of Technology Press, 2016) Szczodrowska, Agnieszka; Kubalt, Kamila; Smolińska, Beata; Leszczyńska, JoannaThis paper examines the accumulation of metal ions from soil in selected edible plants belonging to the Brassicaceae and Lamiaceae families. The effect of metal ions on factors, such as growth and morphology are also investigated. The results indicate that the addition of selected metal ions to the soil significantly increases the concentration of metal ions in the plants. The application of zinc ions significantly enhances Zn uptake in Ocimum basilicum and Mentha piperita (Lamiaceae family). Nickel ions significantly increase Ni accumulation in Lepidium sativum (Brassiaceae family). The research shows that nickel, zinc and copper accumulate in leaves at different concentrations depending on the plant species.Pozycja Spices from Lamiaceae as a source of biologically active compounds(Lodz University of Technology Press, 2015) Kubalt, Kamila; Mańkowska, Dorota; Leszczyńska, JoannaHerbs and spices are often added to food not only to improve the taste and smell, but also facilitate digestion and improve human health. Many spices contain high levels of polyphenolic compounds and demonstrate high antioxidant capacity. According to a literature review polyphenolic compounds possess antimicrobial, antiparasitic, antiprotozoal, and antifungal properties]. Many spices contain high levels of polyphenolic compounds and demonstrate high antioxidant capacity. Phenolic compounds in herbs and spice plants are closely associated with their antioxidant activity ]. Many of the spice-derived compounds which are potent antioxidants may help protect the human body against oxidative stress and inflammatory diseases. Particularly noteworthy is the Lamiaceae family (Lamiaceae Lindl., Labiatae Juss.). Among that species most commonly used as a food additives are basil (Ocimum basilicum), peppermint (Mentha piperita), thyme (Thymus vulgaris), marjoram (Origanum majorana), oregano (Origanum vulgare), rosemary (Rosmarinus officinalis) and sage (Salvia officinalis).Pozycja Presence of Some Panallergens in Tomatoes from Organic and Classic Cultivations(Lodz University of Technology Press, 2015) Słownianek, Marta; Skorupa, Marta; Leszczyńska, JoannaTomato (Lycopersicon esculentum Mill.) is probably the most commonly consumed vegetable worldwide. Although it contains a wide array of beneficial health nutrients and antioxidants, it may also cause adverse allergic reactions in sensitized people. Tomato allergy affects from 1.5% to 16% of the population with food allergy and is often accompanied by allergy to pollen and latex [1]. The aim of the study was to investigate the relation between method of tomato cultivation and allergens’ content in different tomato varieties.Pozycja New Allergens of Anise and Caraway(Lodz University of Technology Press, 2015) Słownianek, Marta; Leszczyńska, JoannaSpices are widely used in cuisine around the world to improve taste and smell values of many dishes and products and are a simple way to achieve good health due to the presence of certain compounds, active substances and even minerals that are needed for our body. Unfortunately they have some disadvantages, as part of their proteins have allergenic properties and contributes to the food hypersensitivity. Allergy to spices makes up approximately 1-4% of all food allergies [1]. Therefore undeclared by manufacturers presence of spices in many dishes and food products pose a threat to health of sensitized persons. The aim of research was identification of potentially allergenic proteins in anise and caraway.Pozycja The contamination of soil with metal ions and a content of biologically active compounds in the selected consumer plants(Lodz University of Technology Press, 2015) Szczodrowska, Agnieszka; Kubalt, Kamila; Smolińska, Beata; Leszczyńska, JoannaSoil has been habitually the most common sink for wastes containing heavy metals [1]. Higher metal ions concentration in plants caused several physiological and biochemical disorders including reduced growth and yield, nutrient uptake, changes in chloroplast ultrastructure and initiation of oxidative stress [2, 3]. Antioxidant enzymes are one mechanism plants have evolved as a response to metal-induced toxicity [4]. For example, guaiacol peroxidase (POD), ascorbate peroxidase (APX), superoxidase dismutase (SOD), and catalase (CAT) significantly contribute to regulate the cellular redox homeostasis to a safe level [5]. The present study investigates the biochemical effects of metal ions-poisoning on plants from a Lamiaceae and Brassicaceae families.Pozycja Application of HPLC-APCI-MS for sensitive determination of bioactive amines in fish-based food products intended for infants and young children(Lodz University of Technology Press, 2015) Czajlowska-Mysłek, Anna; Leszczyńska, JoannaThe presence of bioactive amines (BA) such as putrescine (PUT), cadaverine (CAD), histamine (HIS), tyramine (TYR), spermidine (SPD) and spermine (SPM) in food products intended for infants and young children should be analysed and controlled in respect to their direct (HIS, TYR) or potential toxicity properties (SPD, SPM). The aim of this work was to evaluate the selected bioactive amines content in fish-based food products intended for infants and young children using optimized HPLC-APCI-MS method.