28 results on '"Świerk, P."'
Search Results
2. Effect of butyrate sources in a high-concentrate diet on rumen structure and function in growing rams
- Author
-
S. Świerk, M. Przybyło, J. Flaga, K. Szczepanik, W. Białek, P. Flieger, and P. Górka
- Subjects
Feed additive ,Forestomach structure ,Rumen papillae ,Sodium butyrate ,Tributyrin ,Animal culture ,SF1-1100 - Abstract
Dietary butyrate is considered to have mostly positive impacts on the ruminal epithelium. However, its supplementation in a high-concentrate diet may not be justified as excessive ruminal butyrate may negatively affect the rumen. Furthermore, butyrate impact on the rumen may depend on its source. Thirty-two Świniarka growing rams (30.6 ± 2.5 kg; 11–14 months of age) were used to investigate the effect of a high-concentrate diet and sodium butyrate (SB) or tributyrin (TB) supplementation in a high-concentrate diet on the rumen structure and selected functions. The rams were allocated to four treatments and fed diets with: (1) low concentrate inclusion (22.5% of diet DM; L); (2) high concentrate inclusion (60% of diet DM; H); (3) H with SB (3.2% of diet DM; H+SB); and (4) H with TB (2.93% of diet DM; H+TB). The preplanned contrasts were used for treatment comparisons (L vs H treatments (H, H+SB, and H+TB), H vs H+SB, and H vs H+TB). The BW, BW gain and DM intake did not differ between treatments. In the atrium ruminis, epithelium thickness did not differ between the L and H treatments (P = 0.46), tended to be higher for H+SB than for H (P = 0.09) but did not differ between H+TB and H (P = 0.61). The expression of downregulated in adenoma was higher for L than for H treatments (P = 0.03) but was not affected by SB or TB supplementation (P ≥ 0.26). In the ventral rumen, the mucosa surface and epithelium thickness were lower for L than for H treatments (P
- Published
- 2024
- Full Text
- View/download PDF
3. Systematic literature reviews over the years
- Author
-
Beata Smela, Mondher Toumi, Karolina Świerk, Konrad Gawlik, Emilie Clay, and Laurent Boyer
- Subjects
Systematic literature review ,randomized controlled trial ,ICD-10 classification ,rapid review ,Public aspects of medicine ,RA1-1270 ,Business ,HF5001-6182 - Abstract
ABSTRACTPurpose: Nowadays, systematic literature reviews (SLRs) and meta-analyses are often placed at the top of the study hierarchy of evidence. The main objective of this paper is to evaluate the trends in SLRs of randomized controlled trials (RCTs) throughout the years.Methods: Medline database was searched, using a highly focused search strategy. Each paper was coded according to a specific ICD-10 code; the number of RCTs included in each evaluated SLR was also retrieved. All SLRs analyzing RCTs were included. Protocols, commentaries, or errata were excluded. No restrictions were applied.Results: A total of 7,465 titles and abstracts were analyzed, from which 6,892 were included for further analyses. There was a gradual increase in the number of annual published SLRs, with a significant increase in published articles during the last several years. Overall, the most frequently analyzed areas were diseases of the circulatory system (n = 750) and endocrine, nutritional, and metabolic diseases (n = 734). The majority of SLRs included between 11 and 50 RCTs each.Conclusions: The recognition of SLRs’ usefulness is growing at an increasing speed, which is reflected by the growing number of published studies. The most frequently evaluated diseases are in alignment with leading causes of death and disability worldwide.
- Published
- 2023
- Full Text
- View/download PDF
4. Rapid literature review: definition and methodology
- Author
-
Beata Smela, Mondher Toumi, Karolina Świerk, Clement Francois, Małgorzata Biernikiewicz, Emilie Clay, and Laurent Boyer
- Subjects
Rapid review ,systematic literature review ,methodology ,Delphi consensus ,Public aspects of medicine ,RA1-1270 ,Business ,HF5001-6182 - Abstract
ABSTRACTIntroduction: A rapid literature review (RLR) is an alternative to systematic literature review (SLR) that can speed up the analysis of newly published data. The objective was to identify and summarize available information regarding different approaches to defining RLR and the methodology applied to the conduct of such reviews.Methods: The Medline and EMBASE databases, as well as the grey literature, were searched using the set of keywords and their combination related to the targeted and rapid review, as well as design, approach, and methodology. Of the 3,898 records retrieved, 12 articles were included.Results: Specific definition of RLRs has only been developed in 2021. In terms of methodology, the RLR should be completed within shorter timeframes using simplified procedures in comparison to SLRs, while maintaining a similar level of transparency and minimizing bias. Inherent components of the RLR process should be a clear research question, search protocol, simplified process of study selection, data extraction, and quality assurance.Conclusions: There is a lack of consensus on the formal definition of the RLR and the best approaches to perform it. The evidence-based supporting methods are evolving, and more work is needed to define the most robust approaches.
- Published
- 2023
- Full Text
- View/download PDF
5. Effect of increased intake of concentrates and sodium butyrate supplementation on reticulorumen macroanatomy and reticulorumen fermentation in growing rams
- Author
-
S. Świerk, M. Przybyło, I. Wajsman, E. Molik, R. Miltko, and P. Górka
- Subjects
Acidosis ,Forestomach ,Rumen fermentation ,Short-chain fatty acids ,Xylanolytic activity ,Animal culture ,SF1-1100 - Abstract
Increased ruminal butyrate production is considered to have mostly positive impacts on rumen macro- and microanatomy and its functions. However, excessive ruminal butyrate production may also affect the rumen negatively. Forty-two growing rams were allocated into six treatments and fed a diet with low (22.5% of diet DM; LOW) or high (60% of diet DM; HIGH) inclusion of concentrates in combination with no, low (1.6% of diet DM) or high (3.2% of diet DM) sodium butyrate (SB) supplementation to obtain low or high reticuloruminal (RR) pH with different concentrations of butyrate. Both absolute (L/day) and relative (% of BW) water intake increased linearly with increasing dose of SB (P ≤ 0.02). The RR fluid pH was lower for HIGH compared to LOW treatments (P
- Published
- 2023
- Full Text
- View/download PDF
6. Effect of increased intake of concentrates and sodium butyrate supplementation on ruminal epithelium structure and function in growing rams
- Author
-
S. Świerk, M. Przybyło, J. Flaga, K. Szczepanik, A. Garus-Piętak, W. Biernat, E. Molik, D. Wojtysiak, R. Miltko, and P. Górka
- Subjects
Barrier function ,Epithelium damage ,Forestomach ,Histology ,Ruminants ,Animal culture ,SF1-1100 - Abstract
Increased ruminal butyrate production is considered to have a positive impact on rumen epithelium growth and function. However, excessive ruminal butyrate production may affect the rumen negatively, particularly when the rumen is already challenged with low pH. The aim of this study was to determine the effect of the inclusion of concentrates in the diet and sodium butyrate (SB) supplementation on ruminal epithelium growth and function in growing rams. Forty-two rams (27.8 ± 7.3 kg; 9–14 months of age) were allocated into six treatments and fed a diet with low (22.5% of diet DM; LOW) or high (60% of diet DM; HIGH) inclusion of concentrates in combination with no (SB0), 1.6% (SB1.6) or 3.2% (SB3.2) of diet DM inclusion of SB. There was no impact of the investigated factors on papilla dimensions and mucosa surface area, either in the atrium ruminis or ventral rumen (P ≥ 0.11). Stratum corneum thickness was higher for HIGH compared to LOW treatments (P ≤ 0.04), independently of the location in the rumen. In the atrium ruminis, the epithelium and living strata thickness quadratically increased due to SB supplementation for LOW treatments but quadratically decreased for HIGH treatments (concentrate inclusion × butyrate supplementation interaction; P ≤ 0.03); conversely, in the ventral sac of the rumen, a thicker epithelium was observed due to both increased concentrate inclusion in the diet and SB supplementation (P
- Published
- 2023
- Full Text
- View/download PDF
7. Analysis of Cadmium Accumulation in Linseed (Linum Usitatissimum L.) Depending on Soil pH and Fertilizer Level
- Author
-
Katarzyna Wielgusz, Marcin Praczyk, Lidia Irzykowska, Dariusz Świerk, and Renata Gaj
- Subjects
cadmium uptake ,flax varieties ,linseed oil ,linum usitatissimum ,phosphorus fertilization ,soil contamination ,Science ,Textile bleaching, dyeing, printing, etc. ,TP890-933 - Abstract
Flax (Linum usitatissimum L.) has great potential for the production of oil with functional properties. There are several factors drastically reducing the quality of linseeds. One of them is the cadmium uptake and accumulation in seeds. The aim of this study was to assess the control capability of Cd uptake level by fertilization and soil pH. The experiment was carried with four Polish varieties of linseed: Bukoz, Szafir, Olivin, and Jantarol. The soil with two different pH was used in the experiment: acidic (pH 4.5) and alkaline (pH 7.5). Two concentrations of aqueous solution of cadmium nitrate (Cd(NO3)2) were added to the soil to obtain the final concentration of Cd: 2 mg/kg and 4 mg/kg of soil, respectively. The phosphorous fertilizer was supplied in the amounts of: 50 kg/ha, 100 kg/ha, 150 kg/ha. The results revealed that the pH level is important factors in the cultivation of linseed. The cadmium uptake by linseed can be significantly weakened by increasing the soil pH. Among the four flax varieties examined, the highest seed yield with the lowest Cd content at the same time was obtained for “Bukoz” during cultivation with 100 kg/ha phosphorous fertilization and pH 7.5.
- Published
- 2023
- Full Text
- View/download PDF
8. New Insights into Bioactive Compounds of Wild-Growing Medicinal Plants
- Author
-
Omar Salem, Lidia Szwajkowska-Michałek, Anna Przybylska-Balcerek, Tomasz Szablewski, Renata Cegielska-Radziejewska, Dariusz Świerk, and Kinga Stuper-Szablewska
- Subjects
medicinal plants ,bioactive substances ,antimicrobial activity ,rutin ,phenolic compounds ,phenolic acids ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Plants contain bioactive substances and secondary metabolites that have a variety of functions, including antibacterial, antioxidant, anti-inflammatory, and anticancer activities. In this study, the content of bioactive compounds in five medicinal plants was determined, i.e., Plantago major L., Armoracia rusticana, Hypericum perforatum L., Rumex acetosa L., and Urtica dioica L., from 38 locations. Additionally, the antimicrobial effect of extracts of bioactive compounds from the above-mentioned plants was checked. The experiment used an original method of extracting bioactive compounds. Purpose of the research: the assessment of antimicrobial activity and chemical characterization of extracts obtained using our own method of isolating bioactive compounds from green parts of medical plants in Poland. Based on the research, the presence of bioactive compounds, i.e., phenolic acids and flavonoids, was found in the tested plant extracts. The results of this study suggest that the geographic parameters of the locations where these plants grow have different effects on their biochemical composition and biological activity. The results showed that all tested plants had significant antibacterial activities. Rumex acetose L. showed the highest antimicrobial activity against Escherichia coli and Salmonella enteritidis. These studies supplement the existing literature on the subject with information about the antimicrobial properties of the tested plant extracts that can be used in herbal medicine. The results have significant implications for the pharmaceutical, nutraceutical, and cosmetic sectors, establishing a foundation for future research in this area.
- Published
- 2023
- Full Text
- View/download PDF
9. Mediation: Teachers’ Attitudes and Perceptions of Needs at European Universities in the Context of Eu Language Policy
- Author
-
Kossakowska-Pisarek Sylwia, Siddall Roy, and Świerk Malgorzata
- Subjects
language policy ,mediation ,university teacher ,needs ,attitudes ,Special aspects of education ,LC8-6691 ,Geography. Anthropology. Recreation - Abstract
Mediation is a novel concept in language teaching and learning, and the needs and attitudes of language teachers towards it are largely unexplored. This article provides a brief overview of European language policy and discusses the action-oriented approach in the context of this paradigm shift in language learning and teaching. Finally, an exploratory study is presented that examined the needs and attitudes of language teachers from four European universities regarding mediation, as it has been formulated in the Common European Framework of Reference (CEFR) (Council of Europe, 2001) and redefined in the CEFR Companion Volume with New Descriptors (Council of Europe, 2018). The participating teachers were from the language centres of Charles University in the Czech Republic, Vytautas Magnus University in Lithuania, the University of Helsinki in Finland, and the University of Warsaw in Poland. The study survey measured the strength of (dis)agreement of the teachers with 12 statements concerning various aspects of mediation in the context of their teaching practice. These related to understanding what mediation is and its importance, mediating a text, mediating concepts, mediating communication, and mediation strategies. In addition, two open questions concerned the practice of promoting multilingual and intercultural education and the needs of teachers in the area of mediation. Although the vast majority of the 79 participating teachers (91%) agreed that mediation is vital in language learning and teaching, only a third of them claimed that they understood the concept. Furthermore, the findings indicate that some aspects of mediation are more challenging for the teachers to embrace than others and that some fundamental aspects of mediation do not seem to be part of the current teaching practice of all teachers. Overall, the present study confirmed some of the challenges with the implementation of the CEFR into teaching practice at the higher education level.
- Published
- 2022
- Full Text
- View/download PDF
10. The influence of land use in the catchment area of small waterbodies on the quality of water and plant species composition
- Author
-
Barbara Szpakowska, Dariusz Świerk, Anna Dudzińska, Maria Pajchrowska, and Ryszard Gołdyn
- Subjects
Medicine ,Science - Abstract
Abstract Land use significantly affects the function of waterbodies in landscape. Although there have been numerous studies on the influence of the catchment area on the trophic and ecological status of waterbodies, still is not reached an agreement on the width of the buffer zone that is necessary for effective protection of waterbodies. The aim of the study was to show whether small waterbodies are predominantly influenced by land use in the entire catchment area or only in the zone extending 100 or 200 m away from the shoreline. For two years the waters in six small waterbodies located in the Wielkopolska region (Poland) were analysed. The canonical correspondence analysis (CCA) showed that the influence of land use, especially agricultural land, was much greater within the zone extending 100 m from the shore line of the waterbodies than in the total catchment area. Therefore, it would be advisable to move the border of intensive farming areas beyond the entire 100-m-wide buffer zone, or at least to reduce the intensity of agriculture and to introduce diversified and perennial vegetation creating effective biogeochemical barriers.
- Published
- 2022
- Full Text
- View/download PDF
11. Antimicrobial Activities Evaluation and Phytochemical Screening of Some Selected Plant Materials Used in Traditional Medicine
- Author
-
Kinga Stuper-Szablewska, Tomasz Szablewski, Anna Przybylska-Balcerek, Lidia Szwajkowska-Michałek, Michał Krzyżaniak, Dariusz Świerk, Renata Cegielska-Radziejewska, and Zbigniew Krejpcio
- Subjects
antimicrobial properties ,bioactive compounds ,natural antioxidants ,bitter melon ,elderberry ,wild rose ,Organic chemistry ,QD241-441 - Abstract
Plant extracts are a source of valuable ingredients that can be used in many industries. This paper presents research on the content of selected bioactive compounds in extracts obtained from various plant materials. Raw materials have a documented use in traditional medicine not only in Poland. The tested plants were: bitter melon (fruit), elderberry (flowers, fruit, leaves), wild rose (fruit, flesh, seeds), mountain ash (fruit), guelder rose (fruit), and sea buckthorn (fruit, leaves, pomace). The main goal of these tests is to indicate the potential raw materials that may constitute an alternative source of bioactive compounds with antimicrobial activity. The plant material was tested for the content of bioactive antioxidant compounds and possible antimicrobial activity. The content of polyphenols (phenolic acids and flavonoids) was analyzed using UPLC/PDA, sterols, organic acids, and other bioactive compounds. The minimum inhibitory concentration (MIC) was determined. The total free phenolic acids (TPC) and total free flavonoids (TFC) of all plant raw materials was varied and ranged from 0.21 (mg RUTE/1 g of extract) to 38.30 mg RUTE/1 g of extract) for TFC. The concentration of sterols was, on average, about 10 mg/1 g of extract. The value of approx. 20 mg/1 g of the extract was recorded for bitter melon and beach rose. The content of organic acids was about 1.5 mg/1 g of the extract to even 13 mg/1 g of the extract for sea buckthorn berries. The most sensitive to the extracts’ activity were the following bacteria: M. luteus, P. mirabilis, P. fragii, S. enteritidis, and E. coli. The tested plant materials can be used in various industries as a source of bioactive compounds of an antibacterial nature.
- Published
- 2022
- Full Text
- View/download PDF
12. Andrzej Dudziński: Kartagińskie strategie wobec Sycylii, Kraków 2016 (review)
- Author
-
Martyna Świerk
- Subjects
Ancient history ,D51-90 ,Archaeology ,CC1-960 - Published
- 2018
13. Biotic and abiotic factors causing the collapse of Robinia pseudoacacia L. veteran trees in urban environments.
- Author
-
Agnieszka Wilkaniec, Beata Borowiak-Sobkowiak, Lidia Irzykowska, Włodzimierz Breś, Dariusz Świerk, Łukasz Pardela, Roma Durak, Jadwiga Środulska-Wielgus, and Krzysztof Wielgus
- Subjects
Medicine ,Science - Abstract
Robinia pseudoacacia L. is an interesting example of how one plant species can be considered invasive or useful depending on its environment. In the past this tree species was planted for decorative purposes and for wood in Poland. For many years it was recommended in poor and degraded habitats because it facilitated late-successional plant species. The aim of this study was to verify if black locust can still be regarded as a resistant tree species in urban greenery. The health condition of old tree specimens growing along streets and in parks was compared. The occurrence of pests and pathogens on R. pseudoacacia trees was assessed and the content of mineral elements in leaves was examined. The research results showed that the health of black locust trees growing in the urban environment in Polish cities, especially along streets (in comparison to park sites), deteriorated significantly due to the interaction of harmful biotic and abiotic factors. Increased level of toxic metals (Fe, Zn, Pb, Mn and Cd) in plant tissues and the accumulation of pests and pathogens negatively influenced the health of R. pseudoacacia.
- Published
- 2021
- Full Text
- View/download PDF
14. Szymon Olszaniec: Praefektura praetorio Italii, Illyrikum i Afryki (312–425 n.e.), Toruń 2014 (review)
- Author
-
Martyna Świerk
- Subjects
Ancient history ,D51-90 ,Archaeology ,CC1-960 - Published
- 2017
15. Echa konfliktów społecznych w rzymskiej Afryce w twórczości Apulejusza z Madaury
- Author
-
Martyna Świerk
- Subjects
Ancient history ,D51-90 ,Archaeology ,CC1-960 - Abstract
(Echoes of social conflicts in Roman Africa in the works of Apuleius Madaurensis): The aim of this article is to present the specificity of African society through the prism of social conflicts visible in the works of Apuleius of Madauros. The analysis of potential conflict situations is intended to help to show the interdependence and relationships between various social groups inhabiting North Africa in the second century A.D.
- Published
- 2017
16. Focused Cardiac Ultrasound Examination as a Tool for Diagnosis of Infective Endocarditis and Myocarditis in Dogs and Cats
- Author
-
Olga Szaluś-Jordanow, Marta Stabińska-Smolarz, Michał Czopowicz, Agata Moroz, Marcin Mickiewicz, Andrzej Łobaczewski, Dorota Chrobak-Chmiel, Magdalena Kizerwetter-Świda, Magdalena Rzewuska, Rafał Sapierzyński, Michał Grzegorczyk, Anna Świerk, and Tadeusz Frymus
- Subjects
infective endocarditis ,myocarditis ,dogs ,cats ,Veterinary medicine ,SF600-1100 ,Zoology ,QL1-991 - Abstract
Symptoms of infective endocarditis (IE) and myocarditis are usually nonspecific and include fever, apathy, and loss of appetite. This condition can lead to severe heart failure with ascites or/and fluid in the thoracic cavity or/and in the pericardial sac. We describe infective endocarditis and myocarditis in 3 dogs and 4 cats. In all animals, the initial diagnosis was performed on the basis of a focused cardiac ultrasound examination performed by a general practitioner after a training in this technique. The initial findings were confirmed by a board-certified specialist in veterinary cardiology. Post mortem positive microbiological results from valves were obtained in 4 of 7 patients. Methicillin-resistant Staphylococcus aureus was confirmed in 2 cases and Staphylococcus epidermidis was confirmed in 2 cases, one of which included Enterococcus sp. coinfection. Histopathological examination confirmed initial diagnosis in 5 of 7 animals. In the remaining 2 patients, the time elapsed from the onset of clinical symptoms to death was about 1 month and no active inflammation but massive fibrosis was found microscopically. This is, to our best knowledge, the first report of IE and myocarditis diagnosed in small animals using focused cardiac ultrasound examination. Therefore, we conclude that common usage of this technique by trained general veterinarians may increase the rate of diagnosed patients with these conditions.
- Published
- 2021
- Full Text
- View/download PDF
17. Reconstruction of Copper Smelting Technology Based on 18–20th-Century Slag Remains from the Old Copper Basin, Poland
- Author
-
Katarzyna Derkowska, Mateusz Świerk, and Kamil Nowak
- Subjects
non-ferrous archaeometallurgy ,Cu-slag ,geochemical tracers ,reconstruction ,Archaeometry ,Mineralogy ,QE351-399.2 - Abstract
This research was conducted on historical copper slags from Leszczyna and Kondratów in Lower Silesia, Poland. The area, formerly known as the Old Copper Basin, was a mining and smelting centre between the 18th and 20th centuries, with a dominant period in the 19th century. Cu-carbonates and residual chalcocite dominate local strata-bound copper deposits. Ore bodies are restricted to carbonate strata. A geochemical and mineralogical study of slag samples from four research sites allowed us to establish that a low amount of sulphur in slags results from S-poor ores, and pyrite with gypsum was implemented as reducing agents. Arkose sandstones served as a flux. During smelting, oxygen availability was limited, and temperature exceeded 1200 °C (18th- and 19th-century smelting) and 1400 °C (20th-century smelting). Calculated viscosity indexes mark the low efficiency of metal separation between the silicate and metallic phases. The skeletal and dendritic form of the crystals proved that slag melt was relatively rapidly cooled after formation, usually in air conditions. We estimated that approx. 2000 m3 of slag was created during the leading smelter (Stilles Glück) activity. The research provided various details of the historical copper smelting technological process in Leszczyna and Kondratów.
- Published
- 2021
- Full Text
- View/download PDF
18. How does the content of nutrients in soil affect the health status of trees in city parks?
- Author
-
Tomasz Kleiber, Michał Krzyżaniak, Dariusz Świerk, Anna Haenel, and Sylwia Gałecka
- Subjects
Medicine ,Science - Abstract
Trees have multi-aspect influence on the microclimate in urbanised areas. Therefore, it is important to investigate the biotic and abiotic factors affecting their health. The aim of the conducted study was to assess the chemical composition of soils and the nutritional status of lime and horse chestnut trees in selected sites and the influence of these factors on the condition and health of these tree species in urbanised areas. The research was conducted on selected trees (n = 643) growing in different parts of the city. The soils and plants were analysed for the content of macro- and microelements, sodium and heavy metals. A canonical variation analysis (CVA)-the canonical variant of Fisher's linear discriminant analysis (LDA) was used to construct the model. The CVA enabled the creation of 4 CCA models. The research showed that in general, the soil in all the sites of lime and horse chestnut trees was alkalised-at the same time it was characterised by low salinity. Despite the alkaline soil the statistical analysis showed a positive correlation between the content of manganese in the lime leaves and the deterioration of their health. In spite of that due to the satisfactory health status and condition of trees in most locations temporary guide values of nutrients were proposed for trees growing in urbanised areas. The following temporary guide values of nutrients were proposed for the horse chestnut trees (% d. m.): N 2.38%-4.71%, P 0.24%-0.46%, K 1.13%-2.31%, Ca 1.05%-2.12%, Mg 0.16%-0.42%, S 0.12%-0.23%; Fe 89.8-198.8, Zn 17.6-33.1, Cu 7.36-19.61 (mg kg-1 d. m.). The following temporary guide values were proposed for the small-leaved lime-trees (% d. m.): N 2.45%-3.22%, P 0.27%-0.42%, K 1.52%-2.86%, Ca 1.43%-2.02%, Mg 0.19%-0.35%, S 0.19%-0.25%; Fe 137.6-174.3, Zn 20.2-23.8, Cu 8.36-9.79 (mg kg-1 d. m.).
- Published
- 2019
- Full Text
- View/download PDF
19. Sambucus Nigra Extracts–Natural Antioxidants and Antimicrobial Compounds
- Author
-
Anna Przybylska-Balcerek, Tomasz Szablewski, Lidia Szwajkowska-Michałek, Dariusz Świerk, Renata Cegielska-Radziejewska, Zbigniew Krejpcio, Elżbieta Suchowilska, Łukasz Tomczyk, and Kinga Stuper-Szablewska
- Subjects
Sambuci fructus ,double hydrolysis ,the antibacterial activity of the elderberry fruit extracts ,Organic chemistry ,QD241-441 - Abstract
Due to the health-promoting properties of elderberry fruits, which result from their rich chemical composition, this raw material is widely used in herbal medicine and the food industry. The aim of the study was to demonstrate the antibacterial activity of the elderberry fruit extracts. The research showed that the content of phenolic acids and flavonoids in the extracts determined their antibacterial activity. The research showed that the content of phenolic acids and flavonoids in the extracts determined their antibacterial activity. The following phenolic acids were predominant: chlorogenic acid, sinapic acid, and t-cinnamic acid. Their average content was, respectively, 139.09, 72.84, 51.29 mg/g extract. Rutin and quercetin (their average content was 1105.39 and 306.6 mg/g extract, respectively) were the dominant flavonoids. The research showed that the elderberry polyphenol extracts exhibited activity against selected strains of bacteria within the concentration range of 0.5–0.05%. The following bacteria were the most sensitive to the extracts: Micrococcus luteus, Proteus mirabilis, Pseudomonas fragii, and Escherichia coli. Of the compounds under analysis, apigenin, kaempferol and ferulic, protocatechuic, and p-coumarin acids had the greatest influence on the high antibacterial activity of elderberry extracts. The results of the microbiological and chemical analyses of the composition of the extracts were analyzed statistically to indicate the bioactive compounds of the greatest antimicrobial significance.
- Published
- 2021
- Full Text
- View/download PDF
20. Factors Influencing the Health Status of Trees in Parks and Forests of Urbanized Areas
- Author
-
Michał Krzyżaniak, Dariusz Świerk, and Patryk Antoszewski
- Subjects
Tilia cordata Mill. ,Acer platanoides L. ,Quercus robur L. ,Aesculus hippocastanum L. ,soil pollution ,air pollution ,Plant ecology ,QK900-989 - Abstract
This research concerns the impact of air and soil pollution on the health status of selected tree species in parks and urban forests. The analysis was carried out over a decade, which allowed for creating the best models illustrating the impact of selective factors related to air and soil pollution on the health status of small-leaved limes, maples, oaks, and chestnut trees in the city. (1) Background and Objectives: The research aimed to identify the environmental factors that have the greatest impact on the health condition of trees in urban conditions and show which species are the most resistant to pollution in urban areas. The research object was 2441 individuals of four tree species inhabiting 11 parks and urban forests in Poznań. We assessed the trees in terms of dendrometric parameters and health status. Tree-stand soils were tested for P, K, Ca, Mg, and Na content using various analytical methods. Air data were obtained from a generally accessible WIOS website. The above data were statistically analyzed using one-way ANOVA and canonical correlation analysis (CCA). Our research has shown that unfavorable environmental parameters impact the health status of trees growing in urban areas. The most significant negative impact of O3 on the health of three out of four examined tree species was demonstrated. Other pollutants that affect the trees health include Mn (in the soil) and NO, NO2, CO, and C6H6 (in the air). Oak turned out to be the most resistant species to urban pollution. The area where chestnut trees grew turned out to be the most Fe, Mn, Na, and Pb soil-polluted and air-polluted with most of the substances recorded. The permissible concentration levels were exceeded in the case of tropospheric NOx, PM10, PM2.5, and Pb.
- Published
- 2021
- Full Text
- View/download PDF
21. The Morphological Responses of Calendula officinalis L. 'Radio' to the Foliar Application of Benzyladenine and Different Light Spectra
- Author
-
Barbara Frąszczak, Beata Janowska, and Dariusz Świerk
- Subjects
blue light ,cytokinins ,LED ,pot marigold ,red light ,Agriculture - Abstract
Pot marigold is a valuable medicinal plant with great decorative value. Three combinations of light (white (W)—170 μmol m−2 s−1, white + blue (W+B)—230 μmol m−2 s−1, white + red (W+R)—230 μmol m−2 s−1) were used to analyse the influence of a diversified light spectrum on the morphological traits and flowering of Calendula officinalis L. “Radio”. The effect of foliar treatment of the plants with 6-benzyladenine (BA) at concentrations of 100, 150 and 200 mg dm−3 at all the light spectrum combinations was analysed. BA had negative influence on the earliness of florescence and delayed it even by more than 10 days. W+B light intensified the delay, whereas red light partly reduced it. The BA treatment had the greatest influence on the biometric traits of the plants at the initial period of their development. W+B light significantly inhibited the growth of the plants. A high share of red light in the spectrum positively affected the Fv/Fm value, the relative chlorophyll content and the percentage of dry matter in the plants. When the amount of blue or red light in the spectrum increased, it was possible to obtain specific biometric traits of Calendula without the BA treatment.
- Published
- 2021
- Full Text
- View/download PDF
22. The impact of urban conditions on different tree species in public green areas in the city of Poznan
- Author
-
Krzyżaniak Michał, Świerk Dariusz, Walerzak Miłosz, and Urbański Piotr
- Subjects
norway maple ,pedunculate oak ,small-leaved lime ,statistical models ,urbanised areas ,Plant culture ,SB1-1110 - Abstract
Parks in urbanised areas fulfil an important function as they create a positive climate in cities and contribute to the good health of their inhabitants. The study gives an answer to the question of which of the species under investigation is the most suitable for planting in urbanised areas. The aim of the research conducted from 2013 to 2014 at selected sites in Poznan (Poland) was to determine the state of health of Tilia cordata Mill., Acer platanoides L. and Quercus robur L. trees and to compare their state of health depending on the location of the research sites. The aim of the research was also to determine the environmental variables that may have an influence on the state of health of the tree species under analysis. The research included statistical analyses and models based on discriminant analysis. The research revealed that the state of health of the tree species under investigation growing in the city is determined by anthropogenic factors. The closeness of the city centre, main thoroughfares and estates heated with fossil fuels are the factors that have the most negative influence on the state of health of oak, maple and lime trees. Acer platanoides L. was the species in the best state of health in parks, whereas in forests it was Tilia cordata Mill.
- Published
- 2015
- Full Text
- View/download PDF
23. Third Worldwide Occurrence of Juangodoyite, Na2Cu(CO3)2, and Other Secondary Na, Cu, Mg, and Ca Minerals in the Fore-Sudetic Monocline (Lower Silesia, SW Poland)
- Author
-
Łukasz Kruszewski, Mateusz Świerk, Rafał Siuda, Eligiusz Szełęg, and Beata Marciniak-Maliszewska
- Subjects
juangodoyite ,chalconatronite ,secondary cu minerals ,rapidcreekite ,fore-sudetic monocline ,Mineralogy ,QE351-399.2 - Abstract
Na-Cu carbonates are relatively rare secondary minerals in weathering zones of ore deposits. Hereby we describe mineral composition and crystal chemistry of the most important secondary (Na)Cu minerals and their Na- and Mg-bearing associates forming rich paragenesis in Rudna IX mine. A non-bulky Ca-rich dripstone-like paragenesis from Lubin Główny mine is also characterized, using Powder X-Ray Diffraction, Rietveld, and Electron Microprobe methods. Light blue juangodoyite (3rd occurrence worldwide) and darker chalconatronite are the most important members of the Rudna IX paragenesis, being associated with malachite, aragonite (intergrown with hydromagnesite and northupite), and probably cornwallite. Most of the minerals are chemically close to their ideal composition, with minor Mg substitution in malachite. Cu chlorides are mainly represented by clinoatacamite and probably herbertsmithite. Additional, minor phases include trace Cu minerals langite, wroewolfeite, and a lavendulan-group mineral, and monohydrocalcite. Separate halite-rich encrustations are shown to be filled with eriochalcite, ktenasite, and kröhnkite. The most likely to be confirmed coexisting species include paratacamite, wooldridgeite/nesquehonite, johillerite, melanothallite, and kipushite. The Lubin paragenesis mainly comprises aragonite, gypsum, rapidcreekite, and monohydrocalcite, with trace vaterite. Blue colouration is mainly provided by a yet unspecified Ni-, Co-, Mg-, and Mn-bearing Cu-Zn-Ca arsenate mineral close to parnauite.
- Published
- 2020
- Full Text
- View/download PDF
24. The conception of stakeholders in managing strategy – case study of the community of Inowrocław
- Author
-
Joanna Świerk
- Subjects
interesariusze ,strategia gminy ,perspektywa interesariuszy ,Marketing. Distribution of products ,HF5410-5417.5 ,Finance ,HG1-9999 - Abstract
The objective of this article is to present the conception of the stakeholders in managing the organization. The paper discussed the typology of stakeholders and ways of engaging stakeholders in the activities of the organization. Next, the process of determining of stakeholders was analyzed and the proposition of value for stakeholders included in the strategy of community was presented on the example of Inowrocław. In order to obtain implementation and monitoring results of strategy prepared stakeholders perspective dedicated to Balanced Scorecard with measures to monitor the effects of realizing strategy goals.
- Published
- 2016
- Full Text
- View/download PDF
25. Is There a Pattern for Occurrence of Macrophytes in Polish Ponds?
- Author
-
Dariusz Świerk and Michał Krzyżaniak
- Subjects
macrophytes ,environmental factors ,agricultural areas ,Hydraulic engineering ,TC1-978 ,Water supply for domestic and industrial purposes ,TD201-500 - Abstract
Although ponds are common elements in the environment, dependences occurring in these ecosystems have not been fully investigated. Our study focuses on the correlation between environmental factors and changes occurring in ponds—mostly the distribution of macrophytes in space and time. The aim of our analyses was to indicate which physicochemical variables were characteristic of ponds in specific habitats (forest, agriculture field, and village) and whether they could associate the distribution of vegetation in these ponds. Thirteen ponds differing in morphometric parameters and location in landscape (ponds located in agriculture fields, forests, and villages) were analyzed. Our research was based on data covering a period of 10 years (2008−2018). The following parameters were analyzed: the water content of NH4+, NO3−, NO2−, TP, PO43−, Na, K, Mg, Ca, and Fe, pH, temperature and morphometric parameters. Macrophytes were observed during the growing season in July 2008, 2010, 2012, 2014, 2016 and 2018. Three homogeneous species groups were distinguished in statistical analyses and the dominance of selective environmental factors was assigned to them. The first group consisted of indicator species for forest ponds. Their waters were characterized by a low content of Ca, Mg, and Na as well as an increased content of NH4+ and Fe. The second group was composed of indicator species for field ponds, where the highest NO3− concentrations were found. The third group was formed by indicator species for village ponds. Water of these ponds was characterized by higher concentration levels of K, Na, and total P.
- Published
- 2019
- Full Text
- View/download PDF
26. Turystyka ornitologiczna jako forma turystyki poznawczej
- Author
-
Magdalena Szczepańska, Michał Krzyżaniak, Dariusz Świerk, and Anna Przybył
- Subjects
Turystyka ,Środowisko przyrodnicze ,Badania empiryczne ,Recreation. Leisure ,GV1-1860 - Abstract
Jedną z form turystyki poznawczej jest turystyka ornitologiczna, zwana także birdwatchingiem. Polska posiada ogromny potencjał przyrodniczy, a turystyka ornitologiczna rozwija się coraz prężniej, dlatego tak ważne jest, by była właściwe rozumiana organizowana. Celem pracy przegląd informacji o turystyce ornitologicznej oraz prezentacja podstawowej wiedzy na temat awifauny w Polsce. Ważne jest, aby w turystyce ornitologicznej brały udział osoby już przygotowane pod względem wiedzy i zachowań - świadome i odpowiedzialne. W procesie zdobywania wiedzy istotne jest samokształcenie oraz wiedza na temat najbliższego otoczenia - środowiska przyrodniczego w miejscu zamieszkania. Instalowanie budek lęgowych, karmników oraz tablic z opisami i rysunkami ptaków w parkach miejskich i ogrodach może odegrać szczególną rolę w procesie edukacji przyrodniczej. W terenach otwartych, oprócz szlaków i ścieżek edukacyjnych, istotna będzie harmonijna z naturalnym krajobrazem infrastruktura, która służąc turyście do obserwacji, jednocześnie będzie ochronić przed nim przyrodę, w tym przypadku ptaki, np. wiaty, czatownie, ścianki i wieże widokowe. Współcześnie interesującą formą zdobywania wiedzy i kształtowania postaw może być przynależność do forów internetowych oraz stowarzyszeń a także udział w imprezach ornitologicznych. W przypadku terenów chronionych należy rozważyć obserwację za pośrednictwem kamer internetowych.(abstrakt oryginalny)
- Published
- 2013
27. Koncepcja utworzenia ścieżki dydaktyczno-przyrodniczej: 'Oczka wodne w krajobrazie rolniczym'
- Author
-
Dariusz Świerk, Michał Krzyżaniak, and Magdalena Szczepańska
- Subjects
Szlaki turystyczne ,Zbiorniki wodne ,Działalność dydaktyczna ,Edukacja ekologiczna ,Recreation. Leisure ,GV1-1860 - Abstract
Powyższy artykuł jest propozycją utworzenia ścieżki dydaktyczno-przyrodniczej "Oczka wodne w krajobrazie rolniczym" na terenie Parku Krajobrazowego im. Gen. Dezyderego Chłapowskiego. W skład ścieżki wchodzić będzie 13 małych zbiorników wodnych różniących się pod względem położenia w krajobrazie, wielkości, stopnia eutrofizacji czy występowania roślinności literalnej. Planuje się zainstalowanie na każdym zbiorniku tablicy informacyjnej z krótkim opisem oczka, natomiast na większości obiektów proponuję się umieszczenie tematów dotyczących definicji, funkcji, zagrożeń i ochrony małych zbiorników śródpolnych. Wymiernym efektem utworzenia ścieżki będzie propagowanie podstaw edukacji ekologicznej wśród młodzieży szkolnej, oraz rozwój turystyki na terenie Parku Krajobrazowego im. Dezyderego Chłapowskiego.(abstrakt oryginalny)
- Published
- 2012
28. Wartość rekreacyjna i przyrodnicza ogrodu jordanowskiego w Międzyrzeczu
- Author
-
Michał Krzyżaniak, Magdalena Szczepańska, Dariusz Świerk, and Dagmara Napierała
- Subjects
Dzieci ,Rekreacyjne walory środowiska ,Miasto ,Recreation. Leisure ,GV1-1860 - Abstract
Ogród Jordanowski w Międzyrzeczu to obiekt zieleni publicznej wykorzystywany przez dzieci i młodzież. Jego lokalizacja w centrum miasta, w otoczeniu ruchliwych ulic, powoduje różnego rodzaju niedogodności, którym należy zapobiegać. W pracy przedstawiono zagadnienia dotyczące znaczenia zieleni w życiu dzieci i młodzieży oraz znaczenie różnego rodzaju placów zabaw w rozwoju psycho-ruchowym najmłodszych. Zaprezentowano także skróconą historię rozwoju placów zabaw oraz ogrodów jordanowskich na terenie Polski. Zwrócono także uwagę na właściwy dobór roślin do sadzenia na terenach użytkowanych przez dzieci. Istotną częścią pracy jest przedstawienie wyników inwentaryzacji - obejmujących zarówno spis gatunków i ich udział procentowy w drzewostanie Ogrodu jak i stan zdrowotny zinwentaryzowanej roślinności.(abstrakt oryginalny)
- Published
- 2012
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.