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Wyświetlanie 1-15 z 218
Tytuł:
Analysis of the parameters of supercapacitors containing polypyrrole and its derivatives
Autorzy:
Gocki, M.
Nowak, A.J.
Karoń, K.
Powiązania:
https://bibliotekanauki.pl/articles/24200628.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
polymer supercapacitor
conductive polymers
cyclic voltammetry
chronopotentiometry
superkondensator polimerowy
polimery przewodzące
woltamperometria cykliczna
chronopotencjometria
Opis:
Purpose: Investigation of some parameters of energy storage devices (so-called supercapacitors) in which the structures of selected conductive polymers were implemented. Researchers were interested in the relationship between the parameters of the supercapacitor and the molecular structure of the conductive polymer used as the electrode material. Design/methodology/approach: The polypyrrole and its derivatives were produced by an electropolymerization process performed with cyclic voltammetry. During the research, polymer supercapacitors were created containing collectors made of ITO plates. Measurement of device parameters using cyclic voltammetry and chronopotentiometry. In addition, the devices use polymer electrolytes based on poly (methyl methacrylate) (PMMA). Findings: Devices containing polypyrrole have the best electrochemical parameters, while supercapacitors containing poly (phenylpyrrole) have the lowest parameters. This parameter is due to the high hindrance in the poly(phenylpyrrole) molecule in the form of an aromatic ring. Research limitations/implications: The most significant limitation of the devices is their durability due to the low strength of the conductive layer on ITO plates. This layer was easily degraded with too many test cycles. Practical implications: It was confirmed that polypyrrole and its derivatives could be used as electrode materials in energy storage devices. Originality/value: One of the few studies that allow the evaluation of the molecular structure of polypyrrole and its derivatives as electrode material in symmetrical supercapacitors.
Źródło:
Archives of Materials Science and Engineering; 2023, 120, 1; 5--14
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Considering both sexual and clonal reproduction could help loosen the conflict of use over Robinia pseudoacacia
Autorzy:
Bouteiller, X.P.
Bussolo, M.
Ségura, R.
Mariette, S.
Porté, A.J.
Powiązania:
https://bibliotekanauki.pl/articles/29430768.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Źródło:
Dendrobiology; 2023, 90; 30-38
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nutritional and antioxidant profile of the Physalis fruit grown in three Andean regions of Peru
Autorzy:
Obregón-La Rosa, A.J.
Contreras-López, E.
Juárez, E.F.
Barrón, U.G.
Muñoz, A.M.
Ramos-Escudero, F.
Powiązania:
https://bibliotekanauki.pl/articles/28765541.pdf
Data publikacji:
2023
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Opis:
Background. Physalis peruviana L. fruit contains nutritional and bioactive compounds of immense importance to public health and represents a potential ingredient for the development of functional foods and beverages. Objective. This study aimed to determine the chemical and nutritional composition as well as the antioxidant capacity of the P. peruviana L. fruit grown in Peru in three areas of the Central Andean region. Material and methods. Proximal and physicochemical analyses and estimation of mineral content, vitamin C, total carotenoids, total polyphenols, and antioxidant capacity (2, 2-diphenyl-1-picrylhydrazyl [DPPH] and 2, 2′-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) [ABTS] assays) were performed using standardized methods. Results. The fruits were collected from three regions of the Peruvian Andes (Ancash, Cajamarca, and Cusco). The results showed that the content of potassium (306.54–327.60 mg/100 g) and iron (12.93–14.47 mg/kg) was prominent. The Physalis fruit had high levels of vitamin C (47.20–52.20 mg/100 g), total polyphenols (68.17–83.40 mg equivalents of gallic acid/100 g), and carotenoids (1.12–1.73 mg β-carotene/100 g). Higher values for antioxidant capacity were obtained with the ABTS method (896–1003.33 μmol Trolox/100 g) than with the DPPH method (290–309 μmol Trolox/100 g). Conclusions. This study confirms that the P. peruviana fruit has properties that could provide important health benefits and that it could be used for the development of functional foods and food supplement.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2023, 74, 1; 49-57
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The COVID-19 pandemic and epidemiology of the most common cancers in the Subcarpathian and Silesian Provinces of Poland
Autorzy:
Choręza, P.S.
Kruk, W.
Chudek, J.
Owczarek, A.J.
Powiązania:
https://bibliotekanauki.pl/articles/28761676.pdf
Data publikacji:
2023
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2023, 30, 1; 90-104
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Depositional environment of the Bagh-e-Vang Formation – the only occurrence of upper Lower Permian in Iran
Autorzy:
Yegane, Bizhan Yousefi
Van Loon, A.J. (Tom)
Fard, Sakine Arefi
Farahpour, Mohammad Mehdi
Sharahi, Safoora Yasbolaghi
Powiązania:
https://bibliotekanauki.pl/articles/1841615.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
limestones
microfacies analysis
transgression conglomerate
barrier deposits
lagoonal environment
Tabas Block
wapienie
analiza mikrofacjalna
konglomerat
transgresja
osady
laguna
Opis:
A transgression of the Tethys Ocean occurred in east central Iran, like in other areas of the Tethys Ocean, around the Yakhtashian/Bolorian (regional chronostratigraphical units corresponding with the Artinskian/Kungurian of the Early Permian) transition. This led to the development of a carbonate platform that is represented in the Shirgesht area on the northern part of the Tabas Block by the Bagh-e-Vang Formation, which constitutes the only known sedimentary unit from the late Early Permian in Iran. Field data and thin-section analysis indicate deposition on a carbonate ramp with barriers separating a lagoonal area with intertidal mud flats from the open-marine environment. The overall transgres-sive development is indicated by the presence of open-marine sediments on top of the barrier and lagoonal sediments.
Źródło:
Geologos; 2021, 27, 1; 1-14
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical and microbiological properties of luvisol after addition of post-fermentation residue
Autorzy:
Gryn, G.
Paluszak, Z.
Olszewska, H.
Keutgen, A.J.
Powiązania:
https://bibliotekanauki.pl/articles/13933.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:
Journal of Elementology; 2020, 25, 2
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the friction coefficients of chestnut (Castanea sativa Mill.) sawn timber
Autorzy:
Villar-Garcia, J.R.
Vidal-Lopez, P.
Corbacho, A.J.
Moya, M.
Powiązania:
https://bibliotekanauki.pl/articles/2082657.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
wood
mechanical properties
friction coefficient
direct shear test
Opis:
This work provides the values of both the static and the kinetic friction coefficients for chestnut (Castanea sativa Mill.) of Spanish origin. Knowledge concerning these coefficients has its main application in the study of agroindustrial structures and machinery with timber members in contact. This determination was developed taking into account the timber anisotropy to establish surfaces and directions of slipping. A modified direct shear test device was used to conduct the tests and reproduce the tribological system. This procedure was functional and reliable and considered suitable for standardizing the friction measurement between timber surfaces, since this device is widely distributed in geotechnical and materials laboratories and the European codes do not specify a procedure or device to carry it out. The average values obtained were 0.46 for the static coefficient and 0.33 for the kinetic one, without considering the surfaces and directions of slipping. These values ranged between 0.36 and 0.55 for the static friction coefficient and between 0.28 and 0.39 for the kinetic friction coefficient depending on the direction considered and also taking into account the anisotropy of the timber. A good correlation was obtained between both coefficients, thus allowing for the estimation of the kinetic coefficient from the static one.
Źródło:
International Agrophysics; 2020, 34, 1; 65-77
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intrastratal flow in the Cretaceous Gyeokpori Formation (SW South Korea)
Autorzy:
Byun, Uk Hwan
Van Loon, A.J. (Tom)
Kwon, Yi Kyun
Ko, Kyoungtae
Powiązania:
https://bibliotekanauki.pl/articles/2060260.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
intrastratal flow
Gyeokpori Formation
soft-sediment deformation structures
lacustrine environment
Cretaceous
Opis:
Intrastratal flow is a process that is still poorly understood, rarely described and difficult to interpret in ancient rocks. Sediments in the Cretaceous lacustrine Gyeokpori Formation of southwestern South Korea contain some chaotically deformed sandstone layers with deformed mudstone clasts that are ascribed to this process. The interpretation is based on the fact that these layers cannot be explained as a result of subaqueous debris flows or mass transport, whereas the sedimentary context, including the presence of other soft-sediment deformation structures, indicates that intrastratal flow must have been physically possible. The sedimentary setting was a lake in which mainly siliciclastic rocks were deposited, with some interbedded volcaniclastics. The nearby volcanic activity caused seismic shocks that affected the unstable lake margins resulting in the dominance of gravity-flow deposits, but also in a high sedimentation rate that facilitated soft-sediment deformation partly caused by intrastratal flow. This must have happened fairly frequently during a probably limited time-span, as several layers showing traces of intrastratal flow are present within a succession of only <1 m thick. The combined data on the geological setting and our findings regarding the origin of the various soft-sediment deformation structures may help to recognize the traces left by intrastratal flow elsewhere in the geological record.
Źródło:
Geological Quarterly; 2020, 64, 3; 611--625
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vitamin C does not improve the efficacy of Helicobacter pylori eradication in smokers
Autorzy:
Namiot, A.
Namiot, D.B.
Bucki, R.
Kemona, A.
Kurylonek, A.J.
Namiot, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1918926.pdf
Data publikacji:
2020-06-10
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Helicobacter pylori
treatment
vitamin C
Opis:
Purpose: To evaluate the hypothesis that vitamin C improves the efficacy of Helicobacter pylori eradication in smokers when combined with pantoprazole, amoxicillin, and clarithromycin. Materials and methods: The study completed 90 subjects of 98 enrolled, 58 smokers 32 nonsmokers. Helicobacter pylori status was determined by two methods, CLO test, and histology. Vitamin C (500 mg) was administered three times daily. The patients were considered as cured of H. pylori if the CLO test result and histology were negative 4 weeks after completion of eradication therapy. Results: Smokers had lower effectiveness of eradication therapy than non-smokers and the administration of vitamin C had not affected the outcome of eradication therapy. Conclusions: Vitamin C (500 mg tid) does not improve the eradication therapy when pantoprazole, amoxicillin, and clarithromycin were used.
Źródło:
Progress in Health Sciences; 2020, 10(1); 77-81
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conditions for the development of social farming in the province of Mazovia
Uwarunkowania rozwoju rolnictwa społecznego na Mazowszu
Autorzy:
Parzonko, A.J.
Powiązania:
https://bibliotekanauki.pl/articles/1790471.pdf
Data publikacji:
2019
Wydawca:
The Polish Association of Agricultural and Agribusiness Economists
Tematy:
social farming
care farm
multifunctional rural development
rolnictwo społeczne
gospodarstwo opiekuńcze
wielofunkcyjny rozwój wsi
Opis:
This study aims to identify the conditions for the development of social farming in the province of Mazovia, and to present the opportunities and barriers to the establishment of care farms in Poland. The study involved the method of desk-based literature review and the method of descriptive statistics. The paper provides an analysis of various forms of social farming functioning in the European Union and discusses the possible directions of care farming development depending on the degree of involvement of various institutions. In addition, the study focuses on the most important conditions for the development of care farms in the province of Mazovia, which include the dichotomy of socio-economic development, the spatial polarization of demographic processes and the ageing population. In 2013, the ageing index (the number of persons aged 65+ per 1,000 children aged 0-14) for the province of Mazovia was 993, however, it is expected that in 2035 it will be 1,758, and in 2050 it will reach 2,382. In 2050, the proportion of people aged 65+ in the population of Poland will reach 32.7%. Consequently, the demand for certain services e.g. in the field of health care and social care will be increasing. Unfavourable demographic processes like depopulation and undesirable processes affecting the age structure will mainly affect districts located in the peripheral areas of the province. Even though, currently there are not any care farms operating in Mazovia, there seems to be a great interest in this form of economic activity.
Celem opracowania jest identyfikacja uwarunkowań rozwoju rolnictwa społecznego na Mazowszu oraz przedstawienie szans i barier rozwoju gospodarstw opiekuńczych w Polsce. Wykorzystano metodę analizy literatury przedmiotu i metodę statystyki opisowej. Dokonano analizy funkcjonujących form rolnictwa społecznego w krajach Unii Europejskiej i zaprezentowano warianty możliwych kierunków rozwoju ze względu na stopień zaangażowania różnych instytucji i organizacji w organizację rolnictwa społecznego. Ponadto przestawiono ważniejsze uwarunkowania rozwoju gospodarstw opiekuńczych w województwie mazowieckim, do których zaliczono: dychotomię rozwoju społeczno-gospodarczego Mazowsza, polaryzację przestrzenną procesów demograficznych oraz starzenie się społeczeństwa. W 2013 roku indeks starości dla województwa wyniósł 993, jednak oczekuje się, że w 2035 roku przyjmie wartość 1758, a w 2050 roku – 2382. W 2050 roku przewiduje się 32,7% udział populacji ludzi w wieku 65 lat i więcej w ogólnej populacji Polski. Należy się spodziewać, że w przyszłości będzie wzrastał popyt na niektóre usługi, np. w dziedzinie ochrony zdrowia i opieki społecznej. Niekorzystne procesy demograficzne – ubytek liczby ludności oraz niepożądane procesy zachodzące w jej strukturze wiekowej – wystąpią w powiatach położonych na peryferyjnych obszarach województwa. Na terenie województwa mazowieckiego gospodarstwa opiekuńcze jeszcze nie funkcjonują. Istnieje jednak duże zainteresowanie tą formą działalności.
Źródło:
Annals of The Polish Association of Agricultural and Agribusiness Economists; 2019, 21, 4; 366-373
2657-781X
2657-7828
Pojawia się w:
Annals of The Polish Association of Agricultural and Agribusiness Economists
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of artificial coastal protection structures on Ascidians settlement along the Tamil Nadu coast, India
Autorzy:
Jebakumar, J.P.P.
Nandhagopal, G.
Babu, B.R.
Ragumaran, S.
Ramakritinan, C.M.
Ali, A.J.
Arshan, M.K.
Ravichandran, V.
Powiązania:
https://bibliotekanauki.pl/articles/48441.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
artificial structure
urban sprawl
landscape change
non-native species
Tamil Nadu coast
India
Źródło:
Oceanologia; 2019, 61, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of growth biostimulators and herbicide on the yield structure of edible potato tubers (Solanum tuberosum L.)
Autorzy:
Baranowska, A.J.
Mystkowska, I.T.
Szczygielska
Powiązania:
https://bibliotekanauki.pl/articles/2083621.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
potato
harvest structure
GreenOK Universal-PRO
Asahi SL
Avatar 293 ZC
Opis:
The aim of the research was to define the influence of treatment methods, with the use of growth biostimulators and herbicide on the yield structure of three varieties of edible potato. The series of field research was carried out in the years 2015-2017, in the region of eastern Poland, in Biała Podlaska municipality, in Lubelskie voivodship, on light, acidic soil. The experiment was constructed with the use of random sub-blocks method in three repetitions. The tested factors included: I. factor – three early edible potato varieties Owacja, Bellarosa, Vineta; II. factor – five methods of treatment of the field of potato crops with the use of growth biostimulators: GreenOk-Uniwersal Pro and Asahi SL and their combinations with Avatar 293 ZC herbicide. As a result of the conducted research it was found that the methods of treatment with the use of growth biostimulators and herbicide had a positive effect on the structure of potato tuber yields, compared to the standard object on which only mechanical care was applied. The highest weight percent of large tubers input (in fractions >51mm) was observed in case of experimental object 4. (in case of which herbicide Avatar 293 ZC and GreenOK Universal-PRO preparation were applied) as well as experimental object 3 (post applying biostimulator Asahi SL). Varieties cultivated in the experiment had a significant impact also on the structure of potato crops. An impact of weather conditions on the structure of potato tubers was further noted. Based on the conducted experiment, it can be concluded that the growth biostimulators, as well as their combination with herbicide, positively influenced the quality parameters of potato tubers. Therefore, these preparations should find wider application in agricultural practice.
Źródło:
Acta Agrophysica; 2019, 26, 1; 25-36
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Osteology and phylogeny of Late Jurassic ichthyosaurs from the Slottsmoya Member Lagerstätte (Spitsbergen, Svalbard)
Autorzy:
Delsett, L.L.
Robert, A.J.
Druckenmiller, P.S.
Hurum, J.H.
Powiązania:
https://bibliotekanauki.pl/articles/22418.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
Phylogenetic relationships within the important ichthyosaur family Ophthalmosauridae are not well established, and more specimens and characters, especially from the postcranial skeleton, are needed. Three ophthalmosaurid specimens from the Tithonian (Late Jurassic) of the Slottsmøya Member Lagerstätte on Spitsbergen, Svalbard, are described. Two of the specimens are new and are referred to Keilhauia sp. and Ophthalmosauridae indet. respectively, whereas the third specimen consists of previously undescribed basicranial elements from the holotype of Cryopterygius kristiansenae. The species was recently synonymized with the Russian Undorosaurus gorodischensis, but despite many similarities, we conclude that there are too many differences, for example in the shape of the stapedial head and the proximal head of the humerus; and too little overlap between specimens, to warrant synonymy on species level. A phylogenetic analysis of Ophthalmosauridae is conducted, including all Slottsmøya Member specimens and new characters. The two proposed ophthalmosaurid clades, Ophthalmosaurinae and Platypterygiinae, are retrieved under some circumstances, but with little support. The synonymy of three taxa from the Slottsmøya Member Lagerstätte with Arthropterygius is not supported by the present evidence.
Źródło:
Acta Palaeontologica Polonica; 2019, 64, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationships between eye fluids and blood values after exercise in lidia cattle: mineral parameters
Autorzy:
González-Montaña, J.R.
Escalera-Valente, F.
Lomillos, J.M.
Alonso, A.J.
Gaudioso, V.
Alonso, M.E.
Powiązania:
https://bibliotekanauki.pl/articles/2087493.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aqueous humour
vitreous humour
minerals parameters
intraocular fluids
blood
metabolism
Lidia cattle
Źródło:
Polish Journal of Veterinary Sciences; 2019, 3; 445-455
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studying and evaluating the performance of pedestrian crossing facilities in Babil governorate
Autorzy:
Dakhil, A.J.
Shaheed, S.M.
Alobaidi, D.A.
Powiązania:
https://bibliotekanauki.pl/articles/887083.pdf
Data publikacji:
2019
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Scientific Review Engineering and Environmental Sciences; 2019, 28, 3[85]
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 218

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