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Paweł Pacyga
Department of Energy Technologies, Turbines, and Modeling of Heat-Flow Processes, Faculty of Mechanical and Power Engineering, Wrocław University of Science and Technology, 50-370 Wrocław, Poland

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Journal article
Published: 01 April 2021 in Molecules
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Nutraceuticals and functional foods are gaining more attention amongst consumers interested in nutritious food. The consumption of foodstuffs with a high content of phytochemicals has been proven to provide various health benefits. The application of biostimulants is a potential strategy to fortify cultivated plants with beneficial bioactive compounds. Nevertheless, it has not yet been established whether the proposed higher plants (St. John’s wort, giant goldenrod, common dandelion, red clover, nettle, and valerian) are appropriate for the production of potential bio-products enhancing the nutritional value of white cabbage. Therefore, this research examines the impact of botanical extracts on the growth and nutritional quality of cabbage grown under field conditions. Two extraction methods were used for the production of water-based bio-products, namely: ultrasound-assisted extraction and mechanical homogenisation. Bio-products were applied as foliar sprays to evaluate their impact on total yield, dry weight, photosynthetic pigments, polyphenols, antioxidant activity, vitamin C, nitrates, micro- and macroelements, volatile compounds, fatty acids, sterols, and sugars. Botanical extracts showed different effects on the examined parameters. The best results in terms of physiological and biochemical properties of cabbage were obtained for extracts from common dandelion, valerian, nettle, and giant goldenrod. When enriched with nutrients, vegetables can constitute a valuable component of functional food.

ACS Style

Katarzyna Godlewska; Paweł Pacyga; Izabela Michalak; Anita Biesiada; Antoni Szumny; Natalia Pachura; Urszula Piszcz. Effect of Botanical Extracts on the Growth and Nutritional Quality of Field-Grown White Head Cabbage (Brassica oleracea var. capitata). Molecules 2021, 26, 1992 .

AMA Style

Katarzyna Godlewska, Paweł Pacyga, Izabela Michalak, Anita Biesiada, Antoni Szumny, Natalia Pachura, Urszula Piszcz. Effect of Botanical Extracts on the Growth and Nutritional Quality of Field-Grown White Head Cabbage (Brassica oleracea var. capitata). Molecules. 2021; 26 (7):1992.

Chicago/Turabian Style

Katarzyna Godlewska; Paweł Pacyga; Izabela Michalak; Anita Biesiada; Antoni Szumny; Natalia Pachura; Urszula Piszcz. 2021. "Effect of Botanical Extracts on the Growth and Nutritional Quality of Field-Grown White Head Cabbage (Brassica oleracea var. capitata)." Molecules 26, no. 7: 1992.

Journal article
Published: 14 September 2020 in Molecules
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The use of higher plants for the production of plant growth biostimulants is receiving increased attention among scientists, farmers, investors, consumers and regulators. The aim of the present study was to examine the possibility of converting plants commonly occurring in Europe (St. John’s wort, giant goldenrod, common dandelion, red clover, nettle, valerian) into valuable and easy to use bio-products. The biostimulating activity of botanical extracts and their effect on the chemical composition of celeriac were identified. Plant-based extracts, obtained by ultrasound-assisted extraction and mechanical homogenisation, were tested in field trials. It was found that the obtained formulations increased the total yield of leaves rosettes and roots, the dry weight of leaves rosettes and roots, the content of chlorophyll a + b and carotenoids, the greenness index of leaves, the content of vitamin C in leaves and roots. They mostly decreased the content of polyphenols and antioxidant activities in leaves but increased them in roots and conversely affected the nitrates content. Extracts showed a varied impact on the content of micro­ and macroelements, as well as the composition of volatile compounds and fatty acids in the celeriac biomass. Due to the modulatory properties of the tested products, they may be used successfully in sustainable horticulture.

ACS Style

Katarzyna Godlewska; Paweł Pacyga; Izabela Michalak; Anita Biesiada; Antoni Szumny; Natalia Pachura; Urszula Piszcz. Field-Scale Evaluation of Botanical Extracts Effect on the Yield, Chemical Composition and Antioxidant Activity of Celeriac (Apium graveolens L. Var. rapaceum). Molecules 2020, 25, 4212 .

AMA Style

Katarzyna Godlewska, Paweł Pacyga, Izabela Michalak, Anita Biesiada, Antoni Szumny, Natalia Pachura, Urszula Piszcz. Field-Scale Evaluation of Botanical Extracts Effect on the Yield, Chemical Composition and Antioxidant Activity of Celeriac (Apium graveolens L. Var. rapaceum). Molecules. 2020; 25 (18):4212.

Chicago/Turabian Style

Katarzyna Godlewska; Paweł Pacyga; Izabela Michalak; Anita Biesiada; Antoni Szumny; Natalia Pachura; Urszula Piszcz. 2020. "Field-Scale Evaluation of Botanical Extracts Effect on the Yield, Chemical Composition and Antioxidant Activity of Celeriac (Apium graveolens L. Var. rapaceum)." Molecules 25, no. 18: 4212.

Journal article
Published: 02 March 2020 in Sustainability
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This research presents the possibility of using innovative botanical extracts as biostimulants of plant growth to improve plant nutritional value, growth, and development. It is important to increase agricultural production but this process should be carried out in a sustainable way, without causing risks for both the environment and consumers. For this reason, we have focused on the use of 14 natural raw materials and ultrasound assisted extraction for the production of biostimulants. Results proved that higher plants can be used to obtain valuable products for the application in modern horticulture and agriculture. For instance, extract based on Urtica dioica L. showed the highest biostimulatory properties: in the group sprayed with 0.1% extract cabbage seedlings were longer by 31%, while with 1.0% extract of Polygonum aviculare L. roots were longer by 72% than in the control group treated with water. Extracts based on Equisetum arvense L. (0.5%) and Urtica dioica L. (leaf) (0.1%) increased the fresh weight of sprouts by 113% and 112%, respectively. The highest root weight was observed in groups treated with Equisetum arvense L. (0.5%), Polygonum aviculare L. (0.5%), and Urtica dioica L. (leaf) (2.5%)—heavier by 207%, 206%, and 205%, respectively. Most of biostimulants increased the content of pigments involved in photosynthesis (e.g. 156% more chlorophyll for 0.1% Hypericum perforatum L. extract), decreased the content of polyphenols (e.g. 47% less for 2.5% Trifolium pretense extract), and showed a varied impact on antioxidant activity. There is an increasing interest in botanical extracts due to their high content of biologically active compounds and wide variety of application possibilities.

ACS Style

Katarzyna Godlewska; Anita Biesiada; Izabela Michalak; Paweł Pacyga. The Effect of Botanical Extracts Obtained through Ultrasound-Assisted Extraction on White Head Cabbage (Brassica Oleracea L. Var. Capitata L.) Seedlings Grown under Controlled Conditions. Sustainability 2020, 12, 1871 .

AMA Style

Katarzyna Godlewska, Anita Biesiada, Izabela Michalak, Paweł Pacyga. The Effect of Botanical Extracts Obtained through Ultrasound-Assisted Extraction on White Head Cabbage (Brassica Oleracea L. Var. Capitata L.) Seedlings Grown under Controlled Conditions. Sustainability. 2020; 12 (5):1871.

Chicago/Turabian Style

Katarzyna Godlewska; Anita Biesiada; Izabela Michalak; Paweł Pacyga. 2020. "The Effect of Botanical Extracts Obtained through Ultrasound-Assisted Extraction on White Head Cabbage (Brassica Oleracea L. Var. Capitata L.) Seedlings Grown under Controlled Conditions." Sustainability 12, no. 5: 1871.

Journal article
Published: 26 September 2019 in Sustainability
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The aim of this study was to investigate the potential of using natural raw materials that have not been used for the production of biostimulants of plant growth. These products can effectively contribute to overcome the challenge posed by the increasing demand for food. Ultrasound assisted extraction (UAE) was chosen to prepare innovative biostimulants. The expected outcome of this research was to generate products that show beneficial effects on white head cabbage growth, development, and nutritional quality. The results proved that higher plants (mugwort, calendula, purple coneflower, chamomile, basil, giant goldenrod, comfrey, dandelion, and valerian) can be successfully used for the production of biostimulants. For example, products based on common dandelion showed the highest biostimulating activity. In a group treated with 2.5% flower extract, cabbage shoots were 37% longer, whereas in a group treated with 0.5% leaves extract, roots were longer by 76% as compared with a control group treated with water. Biostimulants based on common mugwort (at a dose of 0.5%) and common dandelion (root) (at a dose of 1.0%) increased the mass of cabbage shoots and roots by 106% and 246%, respectively. The majority of biostimulants increased the content of photosynthetic pigments (chlorophyll and carotenoids) and decreased the content of polyphenols. Botanical extracts also showed varied impact on the antioxidant activity of cabbage. Taking into account the benefits for a wide scope of applications, it is expected that the utilization of these types of products should increase in the future. These products can play a key role in sustainable agriculture.

ACS Style

Katarzyna Godlewska; Anita Biesiada; Izabela Michalak; Paweł Pacyga. The Effect of Plant-Derived Biostimulants on White Head Cabbage Seedlings Grown under Controlled Conditions. Sustainability 2019, 11, 5317 .

AMA Style

Katarzyna Godlewska, Anita Biesiada, Izabela Michalak, Paweł Pacyga. The Effect of Plant-Derived Biostimulants on White Head Cabbage Seedlings Grown under Controlled Conditions. Sustainability. 2019; 11 (19):5317.

Chicago/Turabian Style

Katarzyna Godlewska; Anita Biesiada; Izabela Michalak; Paweł Pacyga. 2019. "The Effect of Plant-Derived Biostimulants on White Head Cabbage Seedlings Grown under Controlled Conditions." Sustainability 11, no. 19: 5317.

Original paper
Published: 27 May 2019 in World Journal of Microbiology and Biotechnology
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In the present paper, products obtained from a blue-green microalga Spirulina platensis filtrate (applied for seed soaking and for foliar spray) and homogenate (used for seed coating) were tested in the cultivation of radish. Their effect on length, wet mass, multielemental composition and the greenness index of the radish leaves was examined. Multi-elemental analyses of the algal products, and radish were also performed using inductively coupled plasma-optical emission spectrometry (ICP-OES). The best soaking time, concentrations of filtrate and doses of homogenate were established. The longest and heaviest plants were observed for homogenate applied at a dose of 300 µL per 1.5 g of seeds and 15% of filtrate applied as foliar spray. The highest chlorophyll content was found in the group treated with 100 µL of homogenate and 5% of filtrate. In the case of soaking time, the longest plants were in the group where seeds were soaked for 6 h, but the heaviest and greenest were after soaking for 48 h. The applied algal products increased the content of elements in seedlings. Obtained results proved that algal extracts have high potential to be applied in modern horticulture and agriculture. The use of Spirulina-based products is consistent with the idea of sustainable agriculture that could help to ensure production of sufficient human food to meet the needs of rising population and protection of the environment.

ACS Style

Katarzyna Godlewska; I. Michalak; Paweł Pacyga; Sylwia Baśladyńska; K. Chojnacka. Potential applications of cyanobacteria: Spirulina platensis filtrates and homogenates in agriculture. World Journal of Microbiology and Biotechnology 2019, 35, 1 -18.

AMA Style

Katarzyna Godlewska, I. Michalak, Paweł Pacyga, Sylwia Baśladyńska, K. Chojnacka. Potential applications of cyanobacteria: Spirulina platensis filtrates and homogenates in agriculture. World Journal of Microbiology and Biotechnology. 2019; 35 (6):1-18.

Chicago/Turabian Style

Katarzyna Godlewska; I. Michalak; Paweł Pacyga; Sylwia Baśladyńska; K. Chojnacka. 2019. "Potential applications of cyanobacteria: Spirulina platensis filtrates and homogenates in agriculture." World Journal of Microbiology and Biotechnology 35, no. 6: 1-18.

Journal article
Published: 13 October 2018 in Materials
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The article presents the concept of a high-temperature solar dryer with an internal bed storage. Granite was selected as the material for filling the bed storage, and an emphasis was put on its versatile use and favourable thermal and mechanical properties. Experimental tests were carried out for the charging process of the bed storage, which was filled with granite spheres with three different diameters. The influence of the sphere’s diameter on the charging and discharging process of the bed storage was analysed. The results of the experiment allowed a conclusion to be drawn that the use of a granite storage bed could prolong the operation of the considered dryer by two hours.

ACS Style

Magdalena Nemś; Artur Nemś; Paweł Pacyga. A Granite Bed Storage for a Small Solar Dryer. Materials 2018, 11, 1969 .

AMA Style

Magdalena Nemś, Artur Nemś, Paweł Pacyga. A Granite Bed Storage for a Small Solar Dryer. Materials. 2018; 11 (10):1969.

Chicago/Turabian Style

Magdalena Nemś; Artur Nemś; Paweł Pacyga. 2018. "A Granite Bed Storage for a Small Solar Dryer." Materials 11, no. 10: 1969.