This page has only limited features, please log in for full access.

Unclaimed
Jakub Sikora
Faculty of Production and Power Engineering, University of Agriculture in Krakow, ul. Balicka 116B, 30-149 Kraków, Poland

Basic Info

Basic Info is private.

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 13 July 2021 in Energies
Reads 0
Downloads 0

In Poland, the development of photovoltaic (PV) installations is an important element in the development of the Renewable Energy Sources (RES) sector and supports the prosumer power industry. The purpose of the article is to present a case study of the PROSUMENT program. It analyzes the data available to date on the development of the PV market in Poland. Apart from the costs of installing the PV systems, the article analyzes the profitability of investment for different micro-power installation capacities. A calculation for micro-power installations subsidized under the PROSUMENT program for various PV capacities is presented, along with the actual amount of the subsidy. The adopted calculation methodology is a comparative verification analysis of the investment cost estimate for a for the two studied PV facilities, i.e., Micro-power installation 1 and Micro-power installation 2. The building’s annual energy demand was adopted at the same level for both examples, with fixed active energy and distribution fees. The study includes a cost estimate for installing the PV systems and the profitability of the investments for various micro-power installation capacities. The analysis of the subsidy under the PROSUMENT program demonstrated that, in the analyzed period of 2016–2020, the best results were achieved by investments with a capacity of 10 kWp. In terms of the net subsidy value, the best results ranged between 27.20 and 19.10% of the total investment costs. Development of the Polish prosumer power market requires building public awareness of prosumer power production as an opportunity for the growth of the Polish economy.

ACS Style

Anna Szeląg-Sikora; Jakub Sikora; Marcin Niemiec; Zofia Gródek-Szostak; Marcin Suder; Maciej Kuboń; Tomasz Borkowski; Gabriela Malik. Solar Power: Stellar Profit or Astronomic Cost? A Case Study of Photovoltaic Installations under Poland’s National Prosumer Policy in 2016–2020. Energies 2021, 14, 4233 .

AMA Style

Anna Szeląg-Sikora, Jakub Sikora, Marcin Niemiec, Zofia Gródek-Szostak, Marcin Suder, Maciej Kuboń, Tomasz Borkowski, Gabriela Malik. Solar Power: Stellar Profit or Astronomic Cost? A Case Study of Photovoltaic Installations under Poland’s National Prosumer Policy in 2016–2020. Energies. 2021; 14 (14):4233.

Chicago/Turabian Style

Anna Szeląg-Sikora; Jakub Sikora; Marcin Niemiec; Zofia Gródek-Szostak; Marcin Suder; Maciej Kuboń; Tomasz Borkowski; Gabriela Malik. 2021. "Solar Power: Stellar Profit or Astronomic Cost? A Case Study of Photovoltaic Installations under Poland’s National Prosumer Policy in 2016–2020." Energies 14, no. 14: 4233.

Journal article
Published: 13 June 2021 in Molecules
Reads 0
Downloads 0

Natural products have always enjoyed great popularity among consumers. Wild tea is an interesting alternative to tea from intensive plantations. The term “wild tea” is applied to many different varieties of tea, the most desirable and valued of which are native or indigenous tea plants. Special pro-health properties of wild tea are attributed to the natural conditions in which it grows. However, there are no complex studies that describe quality and health indicators of wild tea. The aim of this research was to evaluate the quality of wild and cultivated green tea from different regions of China: Wuzhishan, Baisha, Kunlushan, and Pu’Er. The assessment was carried out by verifying the concentration of selected chemical components in tea and relating it to the health risks they may pose, as well as to the nutritional requirements of adults. Wild tea was characterized by higher micronutrient concentration. The analyzed teas can constitute a valuable source of Mn in the diet. A higher concentration of nitrates and oxalates in cultivated tea can be associated with fertilizer use. The analyzed cultivated tea was a better source of antioxidants with a higher concentration of caffeine. There were no indications of health risks for wild or cultivated teas.

ACS Style

Maciej Chowaniak; Marcin Niemiec; Zhiqiang Zhu; Naim Rashidov; Zofia Gródek-Szostak; Anna Szeląg-Sikora; Jakub Sikora; Maciej Kuboń; Salimzoda Fayzullo; Usmon Mahmadyorzoda; Agnieszka Józefowska; Andrzej Lepiarczyk; Florian Gambuś. Quality Assessment of Wild and Cultivated Green Tea from Different Regions of China. Molecules 2021, 26, 3620 .

AMA Style

Maciej Chowaniak, Marcin Niemiec, Zhiqiang Zhu, Naim Rashidov, Zofia Gródek-Szostak, Anna Szeląg-Sikora, Jakub Sikora, Maciej Kuboń, Salimzoda Fayzullo, Usmon Mahmadyorzoda, Agnieszka Józefowska, Andrzej Lepiarczyk, Florian Gambuś. Quality Assessment of Wild and Cultivated Green Tea from Different Regions of China. Molecules. 2021; 26 (12):3620.

Chicago/Turabian Style

Maciej Chowaniak; Marcin Niemiec; Zhiqiang Zhu; Naim Rashidov; Zofia Gródek-Szostak; Anna Szeląg-Sikora; Jakub Sikora; Maciej Kuboń; Salimzoda Fayzullo; Usmon Mahmadyorzoda; Agnieszka Józefowska; Andrzej Lepiarczyk; Florian Gambuś. 2021. "Quality Assessment of Wild and Cultivated Green Tea from Different Regions of China." Molecules 26, no. 12: 3620.

Journal article
Published: 01 April 2021 in Agriculture
Reads 0
Downloads 0

Climate change has a decisive impact on the physical parameters of soil. To counteract this phenomenon, the ongoing search for more effective agri-technical solutions aims at the improvement of the physical properties of soil over a short time. The study aimed to assess the effect of biochar produced from sunflower husks on soil respiration (SR), soil water flux (SWF), and soil temperature (ST), depending on its dose and different soil cover (with and without vegetation). Moreover, the seed yield was assessed depending on the biochar fertilization. Field experiments were conducted on Calcaric/Dolomitic Leptosols (Ochric soil). SR, ST, and SWT were evaluated seven times in three-week intervals during two seasons, over 2018 and 2019. It was found that the time of biochar application had a significant effect on the evaluated parameters. In the second year, the authors observed significantly (p < 0.005) higher soil respiration (4.38 µmol s−1 m−2), soil temperature (21.2 °C), and the level of water net transfer in the soil (0.38 m mol s−1 m−2), compared to the first year. The most effective biochar dose regarding SR and soybean yield was 60 t ha−1. These are promising results, but a more comprehensive cost-benefit analysis is needed to recommend large-scale biochar use at this dose.

ACS Style

Agnieszka Klimek-Kopyra; Urszula Sadowska; Maciej Kuboń; Maciej Gliniak; Jakub Sikora. Sunflower Husk Biochar as a Key Agrotechnical Factor Enhancing Sustainable Soybean Production. Agriculture 2021, 11, 305 .

AMA Style

Agnieszka Klimek-Kopyra, Urszula Sadowska, Maciej Kuboń, Maciej Gliniak, Jakub Sikora. Sunflower Husk Biochar as a Key Agrotechnical Factor Enhancing Sustainable Soybean Production. Agriculture. 2021; 11 (4):305.

Chicago/Turabian Style

Agnieszka Klimek-Kopyra; Urszula Sadowska; Maciej Kuboń; Maciej Gliniak; Jakub Sikora. 2021. "Sunflower Husk Biochar as a Key Agrotechnical Factor Enhancing Sustainable Soybean Production." Agriculture 11, no. 4: 305.

Journal article
Published: 05 December 2020 in Energies
Reads 0
Downloads 0

In the renewable energy source (RES) market, which is highly atomized, business events play an important role in supporting inter-organizational cooperation. The aim of this paper was to examine the impact of three characteristics of the events, namely, the location of the event, type of event (brokerage event versus company mission), and type of leading partner (public versus private), on the effectiveness of the business events (expressed by the number of meetings during an event and the number of partnerships initiated as a result of these meetings). We analyzed 304 promotional events organized in the European RES market. We employed basic statistical tests to verify our hypotheses. Our findings suggest that (1) the numbers of meetings and partnerships differ depending on the event’s location (country and region of Europe), (2) the type of the event (brokerage event versus company mission) affects the numbers of meetings and partnerships (in particular, during brokerage events (BEs), significantly more meetings take place than during company meetings (CMs)), and (3) the type of an event’s leading partner (public versus private) has no impact on the numbers of meetings and partnerships. With its findings, this paper contributes to RES market development and the theory of inter-organizational relations. It presents meaningful implications and recommendations for enterprises, business networks, and event managers operating in RES markets.

ACS Style

Zofia Gródek-Szostak; Marcin Suder; Rafał Kusa; Jakub Sikora; Marcin Niemiec. Effectiveness of Instruments Supporting Inter-Organizational Cooperation in the RES Market in Europe. Case Study of Enterprise Europe Network. Energies 2020, 13, 6443 .

AMA Style

Zofia Gródek-Szostak, Marcin Suder, Rafał Kusa, Jakub Sikora, Marcin Niemiec. Effectiveness of Instruments Supporting Inter-Organizational Cooperation in the RES Market in Europe. Case Study of Enterprise Europe Network. Energies. 2020; 13 (23):6443.

Chicago/Turabian Style

Zofia Gródek-Szostak; Marcin Suder; Rafał Kusa; Jakub Sikora; Marcin Niemiec. 2020. "Effectiveness of Instruments Supporting Inter-Organizational Cooperation in the RES Market in Europe. Case Study of Enterprise Europe Network." Energies 13, no. 23: 6443.

Journal article
Published: 03 July 2020 in Energies
Reads 0
Downloads 0

The promotion of renewable energy is a key concept in the European Union for both environmental and economic reasons. It contributes to securing the objectives set out in the Kyoto Protocol. In addition, it brings various social and economic benefits, e.g., diversification of the energy offer, new jobs, improvement of regional and local development opportunities and building a solid national industry. The main purpose of the article is to contribute to the debate on the instruments promoting renewable energy sources (RES) by emphasizing its importance within the technology transfer network. The subject is an empirical study of an actual technology transfer network. Its international activity promotes RES among entrepreneurs. Data related to meetings as part of brokerage events (BE) and company missions (CM) were subject to statistical and visual analysis, based on the data obtained from the Enterprise Europe Network from the years 2017–2018. The presented results are the foundation for future theoretical and practical studies. One of the important aspects to be examined is the intensity of cooperation launched during CM and BE. It is related to the results of partnership agreements and the importance of increasing the knowledge flow and creating opportunities for partners to acquire foreign technologies.

ACS Style

Zofia Gródek-Szostak; Małgorzata Luc; Anna Szeląg-Sikora; Jakub Sikora; Marcin Niemiec; Luis Ochoa Siguencia; Emil Velinov. Promotion of RES in a Technology Transfer Network. Case Study of the Enterprise Europe Network. Energies 2020, 13, 3445 .

AMA Style

Zofia Gródek-Szostak, Małgorzata Luc, Anna Szeląg-Sikora, Jakub Sikora, Marcin Niemiec, Luis Ochoa Siguencia, Emil Velinov. Promotion of RES in a Technology Transfer Network. Case Study of the Enterprise Europe Network. Energies. 2020; 13 (13):3445.

Chicago/Turabian Style

Zofia Gródek-Szostak; Małgorzata Luc; Anna Szeląg-Sikora; Jakub Sikora; Marcin Niemiec; Luis Ochoa Siguencia; Emil Velinov. 2020. "Promotion of RES in a Technology Transfer Network. Case Study of the Enterprise Europe Network." Energies 13, no. 13: 3445.

Journal article
Published: 21 April 2020 in Energies
Reads 0
Downloads 0

Optimization of plant fertilization is an important element of all quality systems in primary production, such as Integrated Production, GLOBAL G.A.P. (Good Agriculture Practice) or SAI (Sustainable Agriculture Initiative). Fertilization is the most important element of agricultural treatments, affecting the quantity and quality of crops. The aim of the study was to assess greenhouse gas (GHG) emissions in the cultivation of Chinese cabbage, depending on the technological variant. The factor modifying the production technology was the use of fertilizers with a slow release of nutrients. One tonne of marketable Chinese cabbage crop was selected as the functional unit. To achieve the research goal, a strict field experiment was carried out. Calculation of the total amount of GHG emitted from the crop was made in accordance with ISO 14040 and ISO 14044. The system boundaries included the production and use of fertilizers and pesticides, energy consumption for agricultural practices and the emission of gases from soil resources and harvesting residue. The use of slow-release fertilizers resulted in a greater marketable yield of cabbage compared to conventional fertilizers. The results of the research indicate a significant potential for the use of slow-release fertilizers in reducing agricultural emissions. From the environmental and production point of view, the most favourable variant is the one with 108 kg N·ha−1 slow-release fertilizers. At a higher dose of this element, no increase in crop yield was observed. At this nitrogen dose, a 30% reduction in total GHG emissions and a 50% reduction in fertilizer emissions from the use of per product functional unit were observed. The reference object was fertilization in accordance with production practice in the test area.

ACS Style

Jakub Sikora; Marcin Niemiec; Anna Szeląg-Sikora; Zofia Gródek-Szostak; Maciej Kuboń; Monika Komorowska. The Impact of a Controlled-Release Fertilizer on Greenhouse Gas Emissions and the Efficiency of the Production of Chinese Cabbage. Energies 2020, 13, 2063 .

AMA Style

Jakub Sikora, Marcin Niemiec, Anna Szeląg-Sikora, Zofia Gródek-Szostak, Maciej Kuboń, Monika Komorowska. The Impact of a Controlled-Release Fertilizer on Greenhouse Gas Emissions and the Efficiency of the Production of Chinese Cabbage. Energies. 2020; 13 (8):2063.

Chicago/Turabian Style

Jakub Sikora; Marcin Niemiec; Anna Szeląg-Sikora; Zofia Gródek-Szostak; Maciej Kuboń; Monika Komorowska. 2020. "The Impact of a Controlled-Release Fertilizer on Greenhouse Gas Emissions and the Efficiency of the Production of Chinese Cabbage." Energies 13, no. 8: 2063.

Journal article
Published: 09 April 2020 in Energies
Reads 0
Downloads 0

Slaughterhouse waste management is an important technological, economic, and environmental challenge. Recently, more and more attention has been paid to the possibility of obtaining biogas from waste generated by slaughterhouses. The aim of the paper was to examine the effect of an emulsifier addition in the form of a carboxymethyl cellulose solution to create animal waste fermentation media based on the quantity and quality of the generated biogas. The adopted research goal was achieved based on a laboratory experiment of methane fermenting poultry processing waste. The waste was divided into two fractions: soft (tissue) and hard (bone). A fat emulsifier in a concentration of 1%, 2.5%, 5%, and 10% of fresh weight of the substrate was added to each substrate sample made from the above fractions. The emulsifier used was a 55% carboxymethyl cellulose solution, since this emulsifier is most commonly used in food production. The experiment was conducted in order to determine how the addition of an emulsifier (55% carboxymethylcellulose solution) affects the hydration of fats during methane fermentation, as demonstrated on poultry slaughterhouse waste. The samples were subjected to static methane fermentation, according to the methodology of DIM DIN 38414(DIN Deutches Institut für Normung). The experiment lasted 30 days. The total amount of biogas obtained after fermentation was 398 mL·g−1 for the soft fraction and 402 mL·g−1 for the hard fraction. In the case of the soft waste fraction, the addition of carboxymethylcellulose at 1% of the mass to the biogas process increased the amount of obtained biogas by 16%. In the case of the hard fraction, no effect of the addition of emulsifier on the total amount of biogas obtained was identified. In each case, the biogas from substrates with added emulsifier contained less methane and slightly more carbon. The emulsifier added to the soft fraction of slaughterhouse waste from poultry processing allowed cutting the process of methanogenesis by over 50% while maintaining the efficiency of biogas production. In the case of biogasification of bone tissue, no unambiguous effect of the addition of emulsifier on the improvement of process efficiency was identified.

ACS Style

Jakub Sikora; Marcin Niemiec; Anna Szeląg-Sikora; Zofia Gródek-Szostak; Maciej Kuboń; Monika Komorowska. The Effect of the Addition of a Fat Emulsifier on the Amount and Quality of the Obtained Biogas. Energies 2020, 13, 1825 .

AMA Style

Jakub Sikora, Marcin Niemiec, Anna Szeląg-Sikora, Zofia Gródek-Szostak, Maciej Kuboń, Monika Komorowska. The Effect of the Addition of a Fat Emulsifier on the Amount and Quality of the Obtained Biogas. Energies. 2020; 13 (7):1825.

Chicago/Turabian Style

Jakub Sikora; Marcin Niemiec; Anna Szeląg-Sikora; Zofia Gródek-Szostak; Maciej Kuboń; Monika Komorowska. 2020. "The Effect of the Addition of a Fat Emulsifier on the Amount and Quality of the Obtained Biogas." Energies 13, no. 7: 1825.

Journal article
Published: 23 March 2020 in Sustainability
Reads 0
Downloads 0

The goal of organic farming with respect to plant production is to create high-quality products while minimizing human impacts. The aim of this paper was to assess soil properties in selected organic farms in terms of the achievement of general and specific objectives of organic farming. Fifty five (55) organic farms were selected for the research; twenty five (25) of those farms additionally had conventional animal production with cattle breeding. Soil samples were collected from each farm and, the following parameters, deciding about the suitability for agriculture were determined: pH, content of organic carbon, available phosphorus and potassium, mineral nitrogen, and Total nitrogen content. The content of available phosphorus and mineral nitrogen was very low or low in most of the studied soils, which can lead to disturbance of homeostasis of agroecosystems. Potassium content in these soils was high. The properties of the studied soils indicate a high risk of chemical and biological degradation. Without implementing actions that control the pH and increase the content of nitrogen and phosphorus elements, the degradation will increase. Soil properties in the group of farms with animal production were more beneficial from the point of view of crop production, compared with farms that do not breed animals.

ACS Style

Marcin Niemiec; Maciej Chowaniak; Jakub Sikora; Anna Szeląg-Sikora; Zofia Gródek-Szostak; Monika Komorowska. Selected Properties of Soils for Long-Term Use in Organic Farming. Sustainability 2020, 12, 2509 .

AMA Style

Marcin Niemiec, Maciej Chowaniak, Jakub Sikora, Anna Szeląg-Sikora, Zofia Gródek-Szostak, Monika Komorowska. Selected Properties of Soils for Long-Term Use in Organic Farming. Sustainability. 2020; 12 (6):2509.

Chicago/Turabian Style

Marcin Niemiec; Maciej Chowaniak; Jakub Sikora; Anna Szeląg-Sikora; Zofia Gródek-Szostak; Monika Komorowska. 2020. "Selected Properties of Soils for Long-Term Use in Organic Farming." Sustainability 12, no. 6: 2509.

Journal article
Published: 05 March 2020 in Sustainability
Reads 0
Downloads 0

Optimization of plant nutrition is a very important part of primary production quality systems. Crop fertilization is the most important agrotechnical measure because it determines the amount and quality of the yield. Moreover, excess fertilization intensifies the eutrophication processes and the greenhouse effect. The study aimed to assess the suitability of slow-release fertilizers in cultivation of carrot subspecies Daucus carota L. ssp. sativus in the integrated production system. The objective was realized on the basis of a strict field experiment set up on a clay loam soil with low nutrient content. The dose of fertilizer was the experimental factor. The fertilizers were applied during the formation of the ridges. Traditional fertilizers (ammonium phosphate, potassium salt, ammonium nitrate, and a multi-component fertilizer Polifoska 6), as well as a multi-component fertilizer with slow release of nutrients, NPK Mg (18-12-24-4), were used. In individual variants of the experiment, different fertilization strategies were applied: integrated production fertilization, traditional fertilization, and fertilization based on the use of slow-release fertilizers. The control treatment comprised of unfertilized plants. The efficiency of nitrogen fertilization was evaluated based on agronomic efficiency, partial factor productivity, physiological efficiency, and removal efficiency. Fertilization strategy significantly impacted the quantity of obtained yield. In the control sample, prior to mineral fertilization, the crop yield was 33.53 Mg·ha−1. The largest yield was 82.30 Mg·ha−1.The largest yields were obtained from plants fertilized with a combination of slow-release fertilizers, with nitrogen introduced in the form of ammonium phosphate, and through conventional fertilization. The highest productivity and environmental efficiency were obtained in treatments with fertilization according to the principles of integrated production and with slow-release fertilizers. In terms of environmental efficiency, the best results were obtained through nitrogen fertilization using 400 kg of slow-release fertilizers. The use of slow-release fertilizers in carrot cultivation can significantly improve the efficiency of fertilization, both in terms of production and environmental protection.

ACS Style

Jakub Sikora; Marcin Niemiec; Monika Tabak; Zofia Gródek-Szostak; Anna Szeląg-Sikora; Maciej Kuboń; Monika Komorowska. Assessment of the Efficiency of Nitrogen Slow-Release Fertilizers in Integrated Production of Carrot Depending on Fertilization Strategy. Sustainability 2020, 12, 1982 .

AMA Style

Jakub Sikora, Marcin Niemiec, Monika Tabak, Zofia Gródek-Szostak, Anna Szeląg-Sikora, Maciej Kuboń, Monika Komorowska. Assessment of the Efficiency of Nitrogen Slow-Release Fertilizers in Integrated Production of Carrot Depending on Fertilization Strategy. Sustainability. 2020; 12 (5):1982.

Chicago/Turabian Style

Jakub Sikora; Marcin Niemiec; Monika Tabak; Zofia Gródek-Szostak; Anna Szeląg-Sikora; Maciej Kuboń; Monika Komorowska. 2020. "Assessment of the Efficiency of Nitrogen Slow-Release Fertilizers in Integrated Production of Carrot Depending on Fertilization Strategy." Sustainability 12, no. 5: 1982.

Journal article
Published: 12 October 2019 in Sustainability
Reads 0
Downloads 0

Currently, the level of efficiency of an effective agricultural production process is determined by how it reduces natural environmental hazards caused by various types of technologies and means of agricultural production. Compared to conventional production, the aim of integrated agricultural cultivation on commercial farms is to maximize yields while minimizing costs resulting from the limited use of chemical and mineral means of production. As a result, the factor determining the level of obtained yield is the soil’s richness in nutrients. The purpose of this study was to conduct a comparative analysis of soil richness, depending on the production system appropriate for a given farm. The analysis was conducted for two comparative groups of farms with an integrated and conventional production system. The farms included in the research belonged to two groups of agricultural producers and specialized in carrot production.

ACS Style

Anna Szeląg-Sikora; Jakub Sikora; Marcin Niemiec; Zofia Gródek-Szostak; Joanna Kapusta-Duch; Maciej Kuboń; Monika Komorowska; Joanna Karcz. Impact of Integrated and Conventional Plant Production on Selected Soil Parameters in Carrot Production. Sustainability 2019, 11, 5612 .

AMA Style

Anna Szeląg-Sikora, Jakub Sikora, Marcin Niemiec, Zofia Gródek-Szostak, Joanna Kapusta-Duch, Maciej Kuboń, Monika Komorowska, Joanna Karcz. Impact of Integrated and Conventional Plant Production on Selected Soil Parameters in Carrot Production. Sustainability. 2019; 11 (20):5612.

Chicago/Turabian Style

Anna Szeląg-Sikora; Jakub Sikora; Marcin Niemiec; Zofia Gródek-Szostak; Joanna Kapusta-Duch; Maciej Kuboń; Monika Komorowska; Joanna Karcz. 2019. "Impact of Integrated and Conventional Plant Production on Selected Soil Parameters in Carrot Production." Sustainability 11, no. 20: 5612.

Journal article
Published: 01 August 2019 in Sustainability
Reads 0
Downloads 0

The purpose of the article is to identify and estimate the dependency model for the extreme prices of agricultural products listed on the Chicago Mercantile Exchange. The article presents the results of the first stage of research covering the time interval 1975–2010. The selected products are: Corn, soybean and wheat. The analysis of the dependency between extreme price values on the selected futures was based on the estimation of five models of two-dimensional extreme value copulas, namely, the Galambos copula, the Gumbel copula, the Husler–Reiss copula, the Tawn asymmetric copula and the t-EV copula. The next stage of the analysis was to test whether the structure of the dependency described with the estimated copulas is a sufficient approximation of reality, and whether it is suitable for modeling empirical data. The quality of matching the estimated copulas to empirical data of return rates of agricultural products was assessed. For this purpose, the Kendall coefficient was calculated, and the methodology of the empirical combining function was used. The conducted research allowed for the determination of the conduct for this kind of phenomena as it is crucial in the process of investing in derivatives markets. The analyzed phenomena are highly dependent on e.g., financial crises, war, or market speculation but also on drought, fires, rainfall, or even crop oversupply. The conducted analysis is of key importance in terms of balancing agricultural production on a global scale. It should be emphasized that conducting market analysis of agricultural products at the Chicago Mercantile Exchange in the context of competition with the agricultural market of the European Union is of significant importance.

ACS Style

Zofia Gródek-Szostak; Gabriela Malik; Danuta Kajrunajtys; Anna Szeląg-Sikora; Jakub Sikora; Maciej Kuboń; Marcin Niemiec; Joanna Kapusta-Duch. Modeling the Dependency between Extreme Prices of Selected Agricultural Products on the Derivatives Market Using the Linkage Function. Sustainability 2019, 11, 4144 .

AMA Style

Zofia Gródek-Szostak, Gabriela Malik, Danuta Kajrunajtys, Anna Szeląg-Sikora, Jakub Sikora, Maciej Kuboń, Marcin Niemiec, Joanna Kapusta-Duch. Modeling the Dependency between Extreme Prices of Selected Agricultural Products on the Derivatives Market Using the Linkage Function. Sustainability. 2019; 11 (15):4144.

Chicago/Turabian Style

Zofia Gródek-Szostak; Gabriela Malik; Danuta Kajrunajtys; Anna Szeląg-Sikora; Jakub Sikora; Maciej Kuboń; Marcin Niemiec; Joanna Kapusta-Duch. 2019. "Modeling the Dependency between Extreme Prices of Selected Agricultural Products on the Derivatives Market Using the Linkage Function." Sustainability 11, no. 15: 4144.

Journal article
Published: 24 July 2019 in Sustainability
Reads 0
Downloads 0

Plant-based foods should be fresh, safe, and natural, with nutritional value and processed in sustainable ways. Among all consumed vegetables, Brassica vegetables are considered to be the most important ones. As they are eaten in large quantities and frequently, they may constitute an important source of nutrients and bioactive compounds in a daily diet. This work is aimed at assessing the effect of technological processing (blanching and traditional cooking in water and in a convection steam oven) as well as the method of frozen storage (in PE-LD zipper bags and vacuum packing) on the content of selected components in purple cauliflower. The material was examined for the content of dry matter, vitamin C, total polyphenols, anthocyanins, thiocyanates, nitrates, and nitrites, as well as antioxidant activity. All technological processes caused significant changes in the contents of examined nutritive and non-nutritive compounds as well as in antioxidant activity or the level of selected chemical pollutions. A trend was also observed towards lower constituents’ losses as a result of convection steaming, compared to traditional cooking in water. Moreover, the reduction in the content of examined compounds was smaller in vacuum-packed and frozen-stored vegetables then in those stored in zipper PE-LD bags.

ACS Style

Joanna Kapusta-Duch; Anna Szeląg-Sikora; Jakub Sikora; Marcin Niemiec; Zofia Gródek-Szostak; Maciej Kuboń; Teresa Leszczyńska; Barbara Borczak. Health-Promoting Properties of Fresh and Processed Purple Cauliflower. Sustainability 2019, 11, 4008 .

AMA Style

Joanna Kapusta-Duch, Anna Szeląg-Sikora, Jakub Sikora, Marcin Niemiec, Zofia Gródek-Szostak, Maciej Kuboń, Teresa Leszczyńska, Barbara Borczak. Health-Promoting Properties of Fresh and Processed Purple Cauliflower. Sustainability. 2019; 11 (15):4008.

Chicago/Turabian Style

Joanna Kapusta-Duch; Anna Szeląg-Sikora; Jakub Sikora; Marcin Niemiec; Zofia Gródek-Szostak; Maciej Kuboń; Teresa Leszczyńska; Barbara Borczak. 2019. "Health-Promoting Properties of Fresh and Processed Purple Cauliflower." Sustainability 11, no. 15: 4008.

Journal article
Published: 18 July 2019 in Sustainability
Reads 0
Downloads 0

Globalization of the food market is associated with the possibility of selling products into newer markets. However, it is also associated with the necessity to ensure proper quality products. Quality defined by the ISO 9001:2015 standard consists of factors that are part of customers’ expectations concerning the safety of products and the technology of their manufacture. Currently, consumers are looking for products with defined and reproducible sensory properties, in which the content of harmful substances is below the critical values specified by legislation. This is observable particularly in developed countries. The second quality factor is the use of a production technology where negative environmental impacts are reduced. Recently, issues associated with protecting workers’ rights and social needs have also become very important. In successive versions of quality management systems, such as GLOBAL G.A.P. or SAI Platform, social issues are becoming more and more important. The aim of this study was to assess the role of risk analysis for social practices in small farms in building a quality management system. Surveys were conducted in 2018. The surveys covered 62 vegetables or fruit farms with a cultivated area of up to 20 ha. Their lack of staff was due to the character of production. Where mechanic production is possible in small farms, family members can secure workforce demand. To achieve the research objective, a risk analysis was carried out for the implementation of social practices according to the guidelines of the ISO 31000:2018 standard. The criteria and inventory of identified risks were carried out, based on the guidelines of GLOBAL G.A.P. Risk Assessments on Social Practice (GRASP). Based on the identified risks, the areas relating to social practices, which require improvement in order to satisfy compliance with the GLOBAL G.A.P. standard, were indicated. The results of the conducted research pointed to a high risk of good social practices not being carried out and not meeting compliance with the requirements of the GLOBAL G.A.P. standard. The most important identified problems are associated with the deficiency of competent workers as well as the lack of facilities where workers can rest, eat and drink. A considerable problem is the conformity of employment contracts with local legislation and ensuring that work time and rest time are consistent with the law. In conditions of small farms in Poland, the problem with ensuring compliance with the standard in question is often the small number of workers. Creating an organized quality management system in the area of social practices is difficult in these cases, and sometimes even impossible.

ACS Style

Marcin Niemiec; Monika Komorowska; Anna Szeląg-Sikora; Jakub Sikora; Maciej Kuboń; Zofia Gródek-Szostak; Joanna Kapusta-Duch. Risk Assessment for Social Practices in Small Vegetable farms in Poland as a Tool for the Optimization of Quality Management Systems. Sustainability 2019, 11, 3913 .

AMA Style

Marcin Niemiec, Monika Komorowska, Anna Szeląg-Sikora, Jakub Sikora, Maciej Kuboń, Zofia Gródek-Szostak, Joanna Kapusta-Duch. Risk Assessment for Social Practices in Small Vegetable farms in Poland as a Tool for the Optimization of Quality Management Systems. Sustainability. 2019; 11 (14):3913.

Chicago/Turabian Style

Marcin Niemiec; Monika Komorowska; Anna Szeląg-Sikora; Jakub Sikora; Maciej Kuboń; Zofia Gródek-Szostak; Joanna Kapusta-Duch. 2019. "Risk Assessment for Social Practices in Small Vegetable farms in Poland as a Tool for the Optimization of Quality Management Systems." Sustainability 11, no. 14: 3913.

Journal article
Published: 05 July 2019 in PRZEMYSŁ CHEMICZNY
Reads 0
Downloads 0
ACS Style

Jakub Sikora. Wykorzystanie żużla z termicznego przekształcania odpadów komunalnych na cele betoniarskie. PRZEMYSŁ CHEMICZNY 2019, 1, 102 -105.

AMA Style

Jakub Sikora. Wykorzystanie żużla z termicznego przekształcania odpadów komunalnych na cele betoniarskie. PRZEMYSŁ CHEMICZNY. 2019; 1 (7):102-105.

Chicago/Turabian Style

Jakub Sikora. 2019. "Wykorzystanie żużla z termicznego przekształcania odpadów komunalnych na cele betoniarskie." PRZEMYSŁ CHEMICZNY 1, no. 7: 102-105.

Conference paper
Published: 05 July 2019 in E3S Web of Conferences
Reads 0
Downloads 0

The article presents the results of biogas production from municipal and agricultural waste. The mesophilic digestion of feedstocks was evaluated. Fermentation process was performed according to the DIN 38414-S8. Five types of agricultural waste were used for the research: 100% maize silage, 25% apple pomace – 75% maize silage, 50% apple pomace – 50% maize silage, 75% apple pomace – 25% maize silage and under – size fraction of municipal waste from the sorting drum. Fermentation of waste was carried out for 30 days. In the produced biogas, there were measured the content of: CH4, CO2, O2 and the total yield of biogas. The combination of different groups of waste in the fermentation process causes a higher efficiency of biogas production. Additionally thermal analysis (TG, DSC) of biogas digestate were conducted. Due to the impurities present in the biogas digestate derived from municipal waste, it becomes impossible to use it as fertilizer in agriculture.

ACS Style

Monika Kuźnia; Anna Magiera; Wojciech Jerzak; Kinga Pielichowska; Jakub Sikora. Biogas production from agricultural and municipal waste. E3S Web of Conferences 2019, 108, 02010 .

AMA Style

Monika Kuźnia, Anna Magiera, Wojciech Jerzak, Kinga Pielichowska, Jakub Sikora. Biogas production from agricultural and municipal waste. E3S Web of Conferences. 2019; 108 ():02010.

Chicago/Turabian Style

Monika Kuźnia; Anna Magiera; Wojciech Jerzak; Kinga Pielichowska; Jakub Sikora. 2019. "Biogas production from agricultural and municipal waste." E3S Web of Conferences 108, no. : 02010.

Conference paper
Published: 20 June 2019 in 19th International Multidisciplinary Scientific GeoConference SGEM2019, Energy and Clean Technologies
Reads 0
Downloads 0
ACS Style

Anna Szelag-Sikora. DYNAMICS OF CHANGES IN THE POTENTIAL OF RENEWABLE ENERGY. 19th International Multidisciplinary Scientific GeoConference SGEM2019, Energy and Clean Technologies 2019, 1 .

AMA Style

Anna Szelag-Sikora. DYNAMICS OF CHANGES IN THE POTENTIAL OF RENEWABLE ENERGY. 19th International Multidisciplinary Scientific GeoConference SGEM2019, Energy and Clean Technologies. 2019; ():1.

Chicago/Turabian Style

Anna Szelag-Sikora. 2019. "DYNAMICS OF CHANGES IN THE POTENTIAL OF RENEWABLE ENERGY." 19th International Multidisciplinary Scientific GeoConference SGEM2019, Energy and Clean Technologies , no. : 1.

Journal article
Published: 01 June 2019 in Ecological Chemistry and Engineering S
Reads 0
Downloads 0

In the course of analysing sewage sludge biochar (BC) as a material containing phosphorus loads, we determined the following: effect of thermal conversion of three different sewage sludge biochars on the content and availability of P in biochars (BC-1, BC-2 BC-3), effect of their application on selected forms of P in soil and on the accumulation of this component in Poa pratensis L. biomass. Regardless of the type of BC, the contents of P-H2O and P-CaCl2 were lower than the contents determined in unconverted sewage sludge. A significant increase in the content of P-CaCl2 compared to the control was noted in the soil of treatments where 1 and 2 % additions of BC-2 and BC-3 were applied. Soil pH (r = 0.826; p ≤ 0.05) and the content of Ca-exchangeable (r = 0.712; p ≤ 0.05) had the strongest effect on the content of P-CaCl2 in soil; however, no significant relationship was found between the amount of P-introduced with BC, the contents of Al-ox., Fe-ox. and the content of P-CaCl2. Significant (p ≤ 0.05) increase in the phosphorus content in plant biomass was noted in all treatments compared to the control. Regardless of the type of biochar applied, the highest amount of P-uptake was determined in treatments where the greatest addition of BC (2 %) was introduced into the soil. A significant relationship between P-uptake and the amount of P-introduced with BC into the soil (r = 0.726; p ≤ 0.05) was demonstrated.

ACS Style

Krzysztof Gondek; Monika Mierzwa-Hersztek; Michał Kopeć; Jakub Sikora; Tomáš Lošák; Piotr Grzybowski. Sewage Sludge Biochar Effects on Phosphorus Mobility in Soil and Accumulation in Plant. Ecological Chemistry and Engineering S 2019, 26, 367 -381.

AMA Style

Krzysztof Gondek, Monika Mierzwa-Hersztek, Michał Kopeć, Jakub Sikora, Tomáš Lošák, Piotr Grzybowski. Sewage Sludge Biochar Effects on Phosphorus Mobility in Soil and Accumulation in Plant. Ecological Chemistry and Engineering S. 2019; 26 (2):367-381.

Chicago/Turabian Style

Krzysztof Gondek; Monika Mierzwa-Hersztek; Michał Kopeć; Jakub Sikora; Tomáš Lošák; Piotr Grzybowski. 2019. "Sewage Sludge Biochar Effects on Phosphorus Mobility in Soil and Accumulation in Plant." Ecological Chemistry and Engineering S 26, no. 2: 367-381.

Conference paper
Published: 22 May 2019 in Engineering for Rural Development
Reads 0
Downloads 0
ACS Style

Vladimír Mašán; Patrik Burg; Pavla Bukovská; Jakub Sikora. Examination of thermal balance of vertical green mobile wall. Engineering for Rural Development 2019, 1 .

AMA Style

Vladimír Mašán, Patrik Burg, Pavla Bukovská, Jakub Sikora. Examination of thermal balance of vertical green mobile wall. Engineering for Rural Development. 2019; ():1.

Chicago/Turabian Style

Vladimír Mašán; Patrik Burg; Pavla Bukovská; Jakub Sikora. 2019. "Examination of thermal balance of vertical green mobile wall." Engineering for Rural Development , no. : 1.

Article
Published: 29 March 2019 in Biological Trace Element Research
Reads 0
Downloads 0

The study was primarily aimed at investigating the effect of brassica sprout consumption, namely rutabaga (Brassica napus L. var. napobrassica) sprouts (R) generally recognized as antithyroid agent due to its goitrogenic substance content, on hematological, biochemical, and immunological parameters in rats. Sprouts were tested alone and in a combination with other antithyroid factors, such as iodine deficiency (RDI) and sulfadimethoxine (RS). The expression of the heme oxygenase-1 (HO-1) gene in the thyroid as a stress-inducible protein was determined. The thermographic analysis was also estimated. The intake of rutabaga sprouts by healthy rats did not reveal any significant, harmful effect on the thyroid function. Both body temperature and expression of HO-1 remained unchanged in response to the consumed sprouts. In animals with hypothyroidism, rutabaga sprouts enhanced the negative effect of iodine deficiency or sulfadimethoxine ingestion on the organism by increasing the WBC (RDI), TNF-α (RS), creatinine (RS), and triglyceride (RDI and RS) levels, as well as decreasing PLT (RS) level. Moreover, rutabaga sprout consumption by rats with iodine deficiency and sulfadimethoxine decreased their body temperature. Additionally, the concomitant administration of sprouts and iodine depletion significantly reduced the expression of HO-1 in the thyroid. The results may prove useful in confirming rutabaga sprout consumption to be safe, though the seeds of this vegetable provide a well-known antithyroid agent. Our results have shown that rutabaga sprout consumption may be also a factor that enhances the negative clinical features only when combined with iodine deficiency and sulfadimethoxine ingestion.

ACS Style

Paweł Paśko; Ewelina Prochownik; Mirosław Krośniak; Małgorzata Tyszka-Czochara; Renata Francik; Monika Marcinkowska; Jakub Sikora; Mateusz Malinowski; Paweł Zagrodzki. Animals in Iodine Deficiency or Sulfadimethoxine Models of Thyroid Damage Are Differently Affected by the Consumption of Brassica Sprouts. Biological Trace Element Research 2019, 193, 204 -213.

AMA Style

Paweł Paśko, Ewelina Prochownik, Mirosław Krośniak, Małgorzata Tyszka-Czochara, Renata Francik, Monika Marcinkowska, Jakub Sikora, Mateusz Malinowski, Paweł Zagrodzki. Animals in Iodine Deficiency or Sulfadimethoxine Models of Thyroid Damage Are Differently Affected by the Consumption of Brassica Sprouts. Biological Trace Element Research. 2019; 193 (1):204-213.

Chicago/Turabian Style

Paweł Paśko; Ewelina Prochownik; Mirosław Krośniak; Małgorzata Tyszka-Czochara; Renata Francik; Monika Marcinkowska; Jakub Sikora; Mateusz Malinowski; Paweł Zagrodzki. 2019. "Animals in Iodine Deficiency or Sulfadimethoxine Models of Thyroid Damage Are Differently Affected by the Consumption of Brassica Sprouts." Biological Trace Element Research 193, no. 1: 204-213.

Conference paper
Published: 23 January 2019 in IOP Conference Series: Earth and Environmental Science
Reads 0
Downloads 0

Spatial expansion of reed communities is one of the most frequently identified causes of biodiversity loss in lake ecosystems. Common reed is an expansive species and at high supply of biogens in the environment, it displaces other species from the rush communities. Common reed is a cosmopolitan species. It habitats wetlands, both dry and submerged, as well as periodically submerged. Increasing the area of reed rushes leads to a reduction in breeding area for many species of avifauna, especially in wetland areas. The effect of eutrophication of water reservoirs is the increase in the area occupied by reed rushes. Removing biomass from water reservoirs is one of the methods of their reclamation; it is done by slowing the eutrophication process. The aim of the study was to evaluate the economic and environmental efficiency of the removal and utilization of common reed from selected lakes of Pojezierze Mazurskie (the Masurian Lake District) for energy purposes. Within the framework of the study objective, in 2016 collected were samples of reeds from 15 selected lakes and the production potential of the studied reed rush communities was estimated. In the collected biomass samples, the calorific value and chemical composition were determined. Based on the calorific value, the potential for using biomass for energy purposes was estimated, and based on the chemical composition, the amount of nutrients removed from the aquatic environment was estimated. The results of the study show that the average biomass collected from the surface of 1 m2 of reed rushes was 1.053 kg DM. Depending on the habitat from which the samples were collected, significant differences in biomass yield were found. The biomass energy value ranged from 16.4 to 18.1 MJ kg−1, while the ash content ranged from 8.12 to 10.13%. Based on the results of the study, it was estimated that removing reed from 1 ha of rush would remove, on average, approx. 136 kg of nitrogen, approx. 18 kg of phosphorus, 28 kg of sulphur and 155 kg of potassium. The average of over 170 GJ of energy can be obtained from the removed reed biomass. Ash formed during the combustion process can be used as a soil improvement material due to its high macroelement content and a relatively low content of heavy metals. The results show that the removal of common reed can be an effective treatment process resulting in decreasing the lake trophy at an increased supply of nutrients in the catchment area.

ACS Style

M Niemiec; Ł Paluch; Z Gródek-Szostak; A Szeląg-Sikora; J Sikora; K Mudryk. Evaluation of the environmental and economic aspects of the use of common reed from eutrophic lakes for energy purposes. IOP Conference Series: Earth and Environmental Science 2019, 214, 012117 .

AMA Style

M Niemiec, Ł Paluch, Z Gródek-Szostak, A Szeląg-Sikora, J Sikora, K Mudryk. Evaluation of the environmental and economic aspects of the use of common reed from eutrophic lakes for energy purposes. IOP Conference Series: Earth and Environmental Science. 2019; 214 (1):012117.

Chicago/Turabian Style

M Niemiec; Ł Paluch; Z Gródek-Szostak; A Szeląg-Sikora; J Sikora; K Mudryk. 2019. "Evaluation of the environmental and economic aspects of the use of common reed from eutrophic lakes for energy purposes." IOP Conference Series: Earth and Environmental Science 214, no. 1: 012117.