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Tytuł:
Seasonal variations in concentrations of toxic trace metals in deep-sea fishes, identified with STAT-AAS and ICP-AES
Autorzy:
Yaman, B.
Yaman, M.
Powiązania:
https://bibliotekanauki.pl/articles/960199.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
Monitoring toxic metal concentrations in fish is very important for human health because fish, which are consumed by humans, can accumulate toxic metals from water up to hazardous levels. The aim of this study has been to monitor the levels of Cd, Pb, Cu, Cr and Ni in three deep-sea fish species as well as to make a risk assessment of their consumption. The samples were digested in a microwave oven and the determinations were made by atomic absorption spectrophotometry (AAS) and inductively coupled plasma-atomic emission spectrophotometry (ICP-AES). The mean lead concentrations in the Salmo salar and Sarda sarda species were found to be 955 and 948 μg kg-1, respectively, and these levels are three-fold higher than the risk threshold level of 300 μg kg-1. Cd concentrations in only six samples were slightly higher than the maximum allowable concentrations (MACs) of 100 μg kg-1. Mean Cr and Ni concentrations in Salmo salar were found to be 866 and 472 μg kg-1, respectively, and these results were higher than in Sarda sarda (mean 388 μg Cr kg-1 and 356 μg Ni kg-1) and Merlangius merlangus (mean 303 μg Cr kg-1 and 336 μg Ni kg-1). The measured Pb concentrations in all muscles of Salmo salar and Sarda sarda were found to be significantly higher than the MAC values, while Cd in all studied samples was around or lower than the MACs. However, there is no carcinogenic risk for humans, and the risk of developing cancer over an average human lifespan is between 2.5 and 13 in 1,000,000.
Źródło:
Journal of Elementology; 2017, 22, 1
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the phytoextraction potential of thirteen plant species for chromium and vanadium and their relationship with sulfur and histidine
Autorzy:
Akkus, Sukran Ozen
Yaman, Burak
Yaman, Mehmet
Powiązania:
https://bibliotekanauki.pl/articles/962679.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
The aim of this study has been to examine the phytoextraction potential of thirteen plant species for chromium (Cr) and vanadium (V) and their relationship with sulfur and histidine. The species including Juglans regia L., Platanus L., Pinus nigra L., Thuja (Cupressaceae), Salix matsudana, Cupressus arizonica, Eleagnus ang., Vitis vinifera, Nerium olean., Robinia pse., Populous nigra, Grasses and Cedrus libani were collected from two highly industrialized cities: Bursa and Gaziantep, in Turkey. The determinations were carried out by the ICP-MS and HPLC-MS methods. Concentrations of chromium and vanadium were in the ranges of 198-10 484 and 40-1100 μg kg-1, respectively. Concentrations of sulfur were in the range of 705-8762 mg kg-1, while the concentrations of histidine were found to be between 1 and 33 mg kg-1. The ratios of the highest to the lowest chromium concentrations for Salix, Nerium olean. and Thuja (Cupressaceae) were found to be 16.4, 12 and 12.9-fold, respectively. Similarly, the ratios of the highest to the lowest vanadium concentrations for plant species are 2.9-fold for Thuja, 4.1-fold for Pinus nigra, 5.9-fold for Vitis vin. and 3.5-fold for Robinia pseu. Thus, the plant species mentioned above may be considered as a biomonitor and/or having the hyperaccumulator potential for chromium and vanadium. This is the first study in the literature to explore the relationship between the concentrations of histidine and sulfur with chromium and vanadium for the analyzed plant samples. It can be concluded that increased chromium concentrations in Salix leaves stimulate sulfur related with amino acids in this plant.
Źródło:
Journal of Elementology; 2017, 22, 4
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Analysis of Flow Structure in Reciprocating Compressor
Autorzy:
Demircan, Tolga
Yaman, Ali Burak
Powiązania:
https://bibliotekanauki.pl/articles/1165510.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
CFD
Reciprocating compressor
computational fluid dynamics
inlet input angle
Opis:
In line with current rapidly developing technology, mechanization in industry is increasing. In this case, all components that form a machine are becoming important. Compressor plays an important role in operations of numerous machineries. They are used for increasing pressure by compressing gas. Compressors have various types and especially in industries such as automotive, textile, and manufacturing, reciprocating compressors are frequently used. Reciprocating compressors consist of cylinder, piston, and crank and connecting rod mechanism. These components work by narrowing the volume inside the cylinder and increasing gas pressure inside. In this study, flow structure inside a reciprocating compressor was numerically analysed. For this purpose, models were created for 2 different crank angles of a reciprocating compressor. Simulations were made for different pipe angles of inlet pipe and outlet pipe. Valve openings were kept constant at 6 mm. Input and output angles of inlet and outlet pipes to cylinder was changed as 0°, 30°, 45°, 60° and 90°. As a result, it was determined that as the angle of inlet and outlet pipes changed, general flow structure inside the cylinder changed as well. Especially, there were differences in velocity vectors plotted for input and output of the flow from valve to cylinder.
Źródło:
World Scientific News; 2018, 107; 160-170
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anatomical notes on Marsdenia erecta (Apocynaceae) wood: Is it secondarily woody?
Autorzy:
Yaman, B.
Tumen, I.
Powiązania:
https://bibliotekanauki.pl/articles/41367.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
plant anatomy
Marsdenia erecta
Apocynaceae
wood anatomy
Asclepiadoideae
secondary woodiness
Opis:
This study deals with the wood of Marsdenia erecta R. Br., which is poorly known from a wood anatomical point of view. M. erecta, a woody-based perennial with numerous herbaceous sprawling stems, is distributed in the south and eastern parts of the Balkan Peninsula (incl. Crete)and Asia Minor to Afghanistan. The study aims at describing the wood anatomy of the species in detail based on IAWA list of microscopic features for hardwood identification, and at determining whether it has paedomorphic wood anatomical features. In M. erecta wood, the typical decreasing age-on-length graphic for vessel elements and exclusively upright and square ray cells provide strong arguments for paedomorphosis and secondary woodiness. However, to make a precise decision, this result based on wood anatomy should be checked with molecular phylogenetic data of the species investigated.
Źródło:
Dendrobiology; 2012, 67
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
From a “Ring of Friends” to a “Ring of Fire” – The Failed Dream of Middle Europe
Autorzy:
Kouli, Yaman
Powiązania:
https://bibliotekanauki.pl/articles/558243.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Warszawski. Centrum Europejskie
Tematy:
European Neighbourhood Policy
European Investment Bank
International Trade
Economic History
Opis:
Officially, the European Neighbourhood Policy was born in 2004. After the eastern enlargement of the European Union, it became necessary to come up with a coherent strategy with regard to the neighbouring states of the EU. However, although the problem seems to have been caused by the fall of the Iron Curtain, the underlying issue is in fact much older. Already during the 19th century European economists wondered how Europe’s position could be ensured in a world where players like the Russian Empire and the USA made their appearance. Establishing a safe environment and international market European countries have access to has preoccupied economists for more than 160 years. Evidently, Europe has been – and still is – an international player active in security and peace – just not a successful one.
Źródło:
Studia Europejskie - Studies in European Affairs; 2018, 4; 97-108
1428-149X
2719-3780
Pojawia się w:
Studia Europejskie - Studies in European Affairs
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improvement of Anode/HTL Interface Properties Using Self-Assembled Monolayer in Organic Electronic Devices
Autorzy:
Yaman, M.
Yagmurcukardes, N.
Havare, A.
Aydin, H.
Ocakoglu, K.
Okur, S.
Powiązania:
https://bibliotekanauki.pl/articles/1400034.pdf
Data publikacji:
2013-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.40.Qv
Opis:
Fabrication and characterization of highly efficient organic light-emitting diode with surface modification of indium tin oxide anodes by using self-assembled monolayer technique have been studied. Four different self-assembled molecules, K-28 ruthenium complex, octadecylamine hydrochloride, octadecyltrichlorosilane and mercaptohexdecanoic acid are used to modify ITO surface to improve the interface properties. Space charge limited currents measurements have been used to evaluate carrier mobility under steady state current. The results show that the surface properties such as the stability of ITO anode layer have significant effects on charge injection in organic light-emitting diode devices.
Źródło:
Acta Physica Polonica A; 2013, 123, 2; 459-460
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Leaf and fruit characteristics and genetic diversity of wild fruit cerasus prostratagenotypes collected from the Central Anatolia, Turkey
Autorzy:
Uzun, A.
Yaman, M.
Pinar, H.
Gok, B.D.
Gazel, I.
Powiązania:
https://bibliotekanauki.pl/articles/13077288.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2021, 20, 2; 53-62
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Case study about economic order quantities and comparison of results from conventional EOQ model and response surface-based approach
Autorzy:
Yıldız, R.
Yaman, R.
Powiązania:
https://bibliotekanauki.pl/articles/406756.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
economic order quantity
Pareto analysis
response surface
demand forecasting
Opis:
This study involves the implementation of an economic order quantity (EOQ) model which is an inventory control method in a ceramic factory. Two different methods were applied for the calculation of EOQs. The first method is to determine EOQ values using a response surface method-based approach (RSM). The second method uses conventional EOQ calculations. To produce a ceramic product, 281 different and additive materials may be used. First, Pareto (ABC) analysis was performed to determine which of the materials have higher priority. Because of this analysis, the value of 21 items among 281 different materials and additives were compared to the ratio of the total product. The ratio was found to be 70.4% so calculations were made for 21 items. Usage value for every single item for the years 2011, 2012, 2013 and 2014, respectively, were obtained from the company records. Eight different demand forecasting methods were applied to find the amount of the demand in EOQ. As a result of forecasting, the EOQ of the items were calculated by establishing a model. Also, EOQ and RSM calculations for the items were made and both calculation results were compared to each other. Considering the obtained results, it is understood that RSM can be used in EOQ calculations rather than the conventional EOQ model. Also, there are big differences between the EOQ values which were implemented by the company and the values calculated. Because of this work, the RSM-based EOQ approach can be used to decide on the EOQ calculations as a way of improving the system performance.
Źródło:
Management and Production Engineering Review; 2018, 9, 3; 23-32
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The identification of wood charcoals from an Early Bronze Age mound (Yenibademli) in western Turkey
Autorzy:
Yaman, B.
Huryilmaz, H.
Powiązania:
https://bibliotekanauki.pl/articles/52706.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
identification
wood
charcoal
Early Bronze Age
Bronze Age
mound
Turkey [geogr.]
anthracology
wood anatomy
Opis:
Taxonomic identification on the basis of wood anatomy showed that 68.82% of wood charcoals from the Early Bronze Age Site at Yenibademli, on Gökçeada Island (Imbros) in the Northern Aegean region of Turkey belong to the genus Quercus, 15.88% to Pinus, 13.51% to Phillyrea, 0.63% to Arbutus, 0.35% to Ulmus, and 0.23% to the Rosaceae family. The results revealed that the dominant tree genus was oak (Quercus sp.), 67.2% of which was deciduous oak, and the remaining 1.62% was evergreen oak. Quercus and Pinus as the most common two genera in the spectrum of taxa may have a link with oak and pine stands on Gökçeada (Imbros) in the Early Bronze Age. Moreover, the evergreen Quercus (sec. Ilex) and the genus Phillyrea, which was third in the spectrum, suggest that maquis and open vegetation were also present in the Early Bronze Age on Gökçeada.
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2014, 57, 193
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nosocomial Pneumonia in intensive care units
Szpitalne zapalenie płuc w oddziałach intensywnej terapii
Autorzy:
Gutkowska, Dorota
Aktaş, Yeşim Yaman
Powiązania:
https://bibliotekanauki.pl/articles/437923.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
szpitalne zapalenie płuc
oddział intensywnej terapii
strategie zapobiegania
nosocomial pneumonia
intensive care unit
prevention strategies
Opis:
Szpitalne zapalenie płuc jest najczęstszym rodzajem infekcji stwierdzanym w oddziałach intensywnej terapii (OIT), a wysokie odsetki śmiertelności i umieralności z jego powodu nakazują uznać to schorzenie za najbardziej poważne w środowisku szpitalnym. Z tego względu właściwe rozpoznanie i zrozumienie wpływu szpitalnego zapalenia płuc na stan chorych hospitalizowanych w OIT odrywa ważną rolę. Ryzyko zachorowania uzależnione jest od stanu ogólnego pacjenta, rodzaju biologicznego czynnika chorobotwórczego, inwazyjnych i związanych z immunosupresją procedur diagnostyczno-leczniczych. W związku z powyższym zaleca się wdrożenie wielokierunkowych działań, obejmujących systematyczne kształcenie personelu, eliminację czynników ryzyka oraz wprowadzanie rekomendacji opracowanych przez odpowiednie instytucje naukowe. W niniejszym artykule przedstawiono problematykę zapadalności, patogenezy, czynników ryzyka oraz metod zapobiegania szpitalnemu zapaleniu płuc w oddziałach intensywnej terapii.
Nosocomial pneumonia (NP) has been considered the most common infection in Intensive care units (ICUs) and due to its high morbidity and mortality rates it has been deemed the most serious hospital acquired infection. It is vital to recognize and understand the impact of nosocomial infections on ICU patients. The risk of NP is associated with patient’s condition, infectious agents, invasive and immunosuppressive procedures. A multiprong approach should include staf education, minimizing risk factors, and implementing guidelines established by national committees. The aim of this article is to discuss incidence, pathogenesis, risk factors and prevention of nosocomial pneumonia in intensive care units.
Źródło:
Medical Review; 2012, 3; 356-365
2450-6761
Pojawia się w:
Medical Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wood anatomy of ivy-hosting black alder (Alnus glutinosa Gaertn.)
Autorzy:
Yaman, B
Powiązania:
https://bibliotekanauki.pl/articles/41410.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
tree
English ivy
ivy
Hedera helix
ivy impact
host tree
secondary xylem
growth
wood
anatomy
black alder tree
Alnus glutinosa
qualitative property
Opis:
The study aims at investigating the impact of ivy (Hedera helix L.) on the growth and on some wood anatomical characteristics of black alder trees. Ivy-hosting and non-hosting black alder have a similar wood anatomy in terms of qualitative properties. However, in ivy-hosting trees tangential and radial diameter of vessels are narrower (p <0.001), and inter-vessel pits are smaller (p <0.01), whereas vessel frequency is higher (p<0.05) than those of non-hosting ones. The average maximum ray height is greater (p<0.05), and ray number mm-1 is lower (p < 0.001) than those of non-hosting individuals. In addition, the last ten years’ average radial growth has decreased 39.5% compared to that of non-hosting black alder.
Źródło:
Dendrobiology; 2009, 62; 41-45
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nosema pieriae sp. n. (Microsporida, Nosematidae): A New Microsporidian Pathogen of the Cabbage Butterfly Pieris brassicae L. (Lepidoptera: Pieridae)
Autorzy:
YAMAN, Mustafa
BEKİRCAN, Çağrı
RADEK, Renate
LINDE, Andreas
Powiązania:
https://bibliotekanauki.pl/articles/763477.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Pieris brassicae, microsporidian pathogen, Nosema, Lepidoptera, biological control
Opis:
A new microsporidian pathogen of the cabbage butterfly, Pieris brassicae is described based on light microscopy, ultrastructural characteristics and comparative small subunit rDNA analysis. The pathogen infects the gut of P. brassicae. All development stages are in direct contact with the host cell cytoplasm. Meronts are spherical or ovoid. Spherical meronts measure 3.68 ± 0.73 × 3.32 ± 1.09 µm and ovoid meronts 4.04 ± 0.74 × 2.63 ± 0.49 µm. Sporonts are spherical to elongate (4.52 ± 0.48 × 2.16 ± 0.27 µm). Sporoblasts are elongated and measure 4.67 ± 0.60 × 2.30 ± 0.30 µm in length. Fresh spores with nuclei arranged in a diplokaryon are oval and measure 5.29 ± 0.55 µm in length and 2.31 ± 0.29 µm in width. Spores stained with Giemsa’s stain measure 4.21 ± 0.50 µm in length and 1.91 ± 0.24 µm in width. Spores have an isofilar polar filament with six coils. All morphological, ultrastructural and molecular features indicate that the described microsporidium belongs to the genus Nosema and confirm that it has different taxonomic characters than other microsporidia infecting Pieris spp.
Źródło:
Acta Protozoologica; 2014, 53, 2
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution and Occurrence of Vairimorpha plodiae (Opisthokonta: Microspora) in the Indian Meal Moth, Plodia interpunctella (Lepidoptera: Pyralidae) Populations: An Extensive Field Study
Autorzy:
Sağlam, Tuğba
Yaman, Mustafa
Ertürk, Ömer
Powiązania:
https://bibliotekanauki.pl/articles/2041945.pdf
Data publikacji:
2020-12-30
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Plodia interpunctella
Vairimorpha plodiae
biological control
stored product pest
entomopathogen
Opis:
The Indian meal moth, Plodia interpunctella (Lepidoptera: Pyralidae) is one of the most important stored product pests. Fumigation plays a significant role in the management of insect pests in stored-products. However, the use of fumigants is problematic because of their effects on the environment and high costs. Entomopathogenic organisms are environmentally friendly control agents and suppress pest populations under natural conditions. In this study, distribution and occurrence of a microsporidian pathogen, Vairimorpha plodiae (Opisthokonta: Microspora) in the populations of P. interpunctella from 12 localities representing Turkey between 2019 and 2020 are presented for the first time by confirming its effectiveness on natural populations. The presence of the microsporidian pathogen was found in 11 of 12 (91.7%) populations. In total, 863 of 3,044 samples were infected by the pathogen. Infection mean was 28.4% for all populations. Our results showed that V. plodiae infection reached to a considerably high prevalence (88.77%) in P. interpunctella populations and varied from 5.1 to 88.7% between the populations. In addition, microsporidia infections have been identified throughout Turkey. We found that V. plodiae can infect all life stages of P. interpunctella. Totally, 623 (28.5%) of 2187 larvae, 14 (37.8%) of 37 pupae, 226 (27%) of 820 adults were found to be infected by the pathogen. There were considerable differences between the dead and living larvae. The microsporidian infection was found in 26 (11.6%) of 225 living larvae, whereas it was found in 595 (30.5%) of 1,952 dead larvae. These results confirm that the microsporidia pathogen has a high spreading potential in P. interpunctella populations and can be a natural biological suppression factor on pest populations.
Źródło:
Acta Protozoologica; 2021, 60; 31-36
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Change-point detection and trend analysis in monthly, seasonal and annual air temperature and precipitation series in Bartın province in the western Black Sea region of Turkey
Autorzy:
Yaman, Barbaros
Ertuğrul, Mertol
Powiązania:
https://bibliotekanauki.pl/articles/1841778.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
climate change
homogeneity
precipitation
temperature
trend analysis
Opis:
Studies associated with climate change and variability are of great importance at both the global and local scale in the global climate crisis. In this study, change-point detection and trend analysis were carried out on mean, maximum, minimum air temperatures and total precipitation based on monthly, seasonal and annual scale in Bartın province located in the western Black Sea Region of Turkey. For this aim, 4-different homogeneity tests (von Neumann test, Pettitt test, Buishand range test and standard normal homogeneity test) for changepoint detection, Modified Mann–Kendall test and Şen’s innovative trend test for trend analysis, and Sen’s slope test for the magnitude estimation of trends were used. According to the test results, the summer temperatures in particular show increasing trends at the 0.001 significance level. Mean maximum temperature in August, mean minimum temperature in June and August, and mean temperature in July and August are in increasing trend at the 0.001 significance level. Over a 51 year period (1965–2015) in Bartın province, the highest rate of change per decade in air temperatures is in August (0.55°C for Tmax, 0.46°C for Tmin and 0.43°C for Tmean) based on Sen’s slope. However, the study showed that apart from October precipitation, there is no significant trend in monthly, seasonal and annual precipitation in Bartın. Increasing trends in mentioned climate variables are also visually very clear and strong in Şen’s innovative trend method, and they comply with the statistical results. As a result, the study revealed some evidence that temperatures will increase in the future in Bartın and its environs.
Źródło:
Geology, Geophysics and Environment; 2020, 46, 3; 223-237
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł

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