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Tytuł:
„So fällt die Feder mir vor Wehmuth aus der Hand“ – Verstummen und Nicht -mehr -Schreiben -Können als Topos im Klagegedicht der Frühaufklärung
“The quill drops from my woeful hand” – Falling silent and losing the capacity to write as a topos in lamentation poetry from the Early Enlightenment
Autorzy:
Klimek, Sonja
Powiązania:
https://bibliotekanauki.pl/articles/1286828.pdf
Data publikacji:
2018-02-06
Wydawca:
Uniwersytet Gdański. Wydawnictwo Uniwersytetu Gdańskiego
Tematy:
Klagelyrik
Frühaufklärung
Unsagbarkeitstopos
Trauer
Frauenbildung
lamentation poetry
Early Enlightenment
topos of the inexpressible
learned women
Opis:
Trauer gilt seit der Antike als sprachlos machende Emotion. Dennoch gibt es in wohl allen Literaturen aller Zeiten Klagelyrik. Wie aber kann jemand, der eigentlich vor Trauer verstummt, überzeugend als ‚Sprecher‘ eines Klagegedichts vorgestellt werden? Anhand zweier Beispiele aus dem Barock wird gezeigt, mit welchen Topoi dieses Dilemma im Gedicht selbst thematisiert und somit zur eigentlichen ‚inventio‘ des Gedichtes gemacht wurde. Abschließend wird am Beispiel dreier Dichterinnen der Frühaufklärung untersucht, wie Frauen gegen das als ‚weiblich‘ konnotierte Verstummen vor Trauer anschrieben.
Since antiquity, grief has been regarded as an emotion that makes us fall silent. Nevertheless, all times and cultures have produced lamentation poetry. But how can someone who is in grieving be convincingly presented as the ‘speaker’ of a poem? Referring to two Baroque poems, this paper shows which topoi authors have used to make this dilemma the ‘inventio’ of a poem. Finally, three examples of early Enlightenment women poets are studied who, in their lamentation poetry, fight the silencing which is assumed to be typically ‘female’.
Źródło:
Studia Germanica Gedanensia; 2018, 38; 26-42
1230-6045
Pojawia się w:
Studia Germanica Gedanensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A genetic algorithm for the project scheduling with the resource constraints
Autorzy:
Klimek, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/764689.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2010, 10, 1
1732-1360
2083-3628
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new ceramic composite based on spherical aluminium oxide for auxiliary panels in high-temperature firing processes
Autorzy:
Spyrka, M.
Atraszkiewicz, R.
Klimek, L.
Powiązania:
https://bibliotekanauki.pl/articles/1818499.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
ceramics
mechanical properties
holospheres
Al2O3
ceramika
właściwości mechaniczne
holosfery
Opis:
Purpose: The subject of the research and investigation is a new ceramic foundry composite based on a spherical form of aluminium oxide. It is intended to limit the occurrence of technological problems related to the appropriate selection of auxiliary refractory materials, such as cracking, high heat capacity and variable coefficient of thermal expansion. Design/methodology/approach: A composite ceramic material with the spherical form of aluminium oxide included allows to reduce mass and stabilize characteristics of dimensional changes as a function of temperature in auxiliary panels in high-temperature firing processes with typical manufacturing process of the ceramics, which is gravity casting, drying and high-temperature firing. Findings: The study showed that the quantitative share of the spherical form of Al2O3 in the volume of ceramic material has a major impact on its properties. An increased share of spheres translates into greater material porosity and lower matrix density but also, by reducing the cross-section, into decreased strength properties. In the case of the developed ceramic material, there is no visible trend of a decrease in the coefficient of thermal expansion with increasing temperature, which is the case with traditional ceramic materials. Research limitations/implications: The strength of presented composite isn’t good and constitutes a further direction of research and development of the material. Practical implications: Although decreased strength properties, the composite with no visible trend of a decrease in the coefficient of thermal expansion with increasing temperature could be used as panels in high-temperature firing processes. Originality/value: New ceramic foundry composite based on a spherical form of aluminium oxide for auxiliary panels in high temperature processes.
Źródło:
Archives of Materials Science and Engineering; 2020, 101, 1; 5--14
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A project of the method for assessing horse suitability for leisure riding
Projekt metody oceny przydatności koni do rekreacji
Autorzy:
Wilk, I.
Janczarek, I.
Klimek, B.
Powiązania:
https://bibliotekanauki.pl/articles/2196924.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
assessment method
horse
suitability
leisure
individual trait
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica; 2013, 31, 3; 53-64
0239-4243
2083-7399
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A protocol for sonication-assisted Agrobacterium rhizogenes-mediated transformation of haploid and diploid sugar beet (Beta vulgaris L.) explants
Autorzy:
Klimek-Chodacka, Magdalena
Baranski, Rafal
Powiązania:
https://bibliotekanauki.pl/articles/1039318.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
genetic modification
hairy root
SAAT
ultrasound
Opis:
Hairy root cultures obtained after Agrobacterium rhizogenes-mediated genetic transformation can serve as a model system for studying plant metabolism and physiology, or can be utilized for the production of secondary metabolites. So far no efficient protocol of hairy root development in sugar beet has been publically released. In this work, two A. rhizogenes strains (A4T and LBA1334) carrying a binary vector pBIN-m-gfp5-ER or pCAMBIA1301 possessing gfp and uidA reporter genes were used to transform petiole explants of haploid and diploid sugar beet genotypes. Five treatment combinations of sonicated-assisted Agrobacterium-mediated transformation were compared. Hairy roots appeared on 0% to 54% of explants depending on the treatment combination used. The highest frequency was achieved when explants of a diploid genotype were sonicated for 15 s in the inoculum containing A. rhizogenes of OD600=0.5 and then co-cultured for three days. Using the same treatment combinations the explants of haploid genotypes developed hairy roots with the frequency ranging from 10% to 36%. Transformation efficiency was independent on the bacterial strain used. The results indicate that haploid sugar beet explants are amenable to transformation using A. rhizogenes, and that the efficiency of that process can be increased by applying short ultrasound treatment.
Źródło:
Acta Biochimica Polonica; 2014, 61, 1; 13-17
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A system for deduction-based formal verification of workflow-oriented software models
Autorzy:
Klimek, R.
Powiązania:
https://bibliotekanauki.pl/articles/330429.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
formal verification
deductive reasoning
temporal logic
semantic tableaux
workflow pattern
logical primitive
generating logical specification
business model
BPMN
formalna weryfikacja
wnioskowanie dedukcyjne
logika temporalna
tablica semantyczna
wzorzec przepływu pracy
generowanie specyfikacji logicznej
model biznesowy
Opis:
The work concerns formal verification of workflow-oriented software models using the deductive approach. The formal correctness of a model’s behaviour is considered. Manually building logical specifications, which are regarded as a set of temporal logic formulas, seems to be a significant obstacle for an inexperienced user when applying the deductive approach. A system, along with its architecture, for deduction-based verification of workflow-oriented models is proposed. The process inference is based on the semantic tableaux method, which has some advantages when compared with traditional deduction strategies. The algorithm for automatic generation of logical specifications is proposed. The generation procedure is based on predefined workflow patterns for BPMN, which is a standard and dominant notation for the modeling of business processes. The main idea behind the approach is to consider patterns, defined in terms of temporal logic, as a kind of (logical) primitives which enable the transformation of models to temporal logic formulas constituting a logical specification. Automation of the generation process is crucial for bridging the gap between the intuitiveness of deductive reasoning and the difficulty of its practical application when logical specifications are built manually. This approach has gone some way towards supporting, hopefully enhancing, our understanding of deduction-based formal verification of workflow-oriented models.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2014, 24, 4; 941-956
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Two-Phase Algorithm for a Resource Constrained Project Scheduling Problem with Discounted Cash Flows
Autorzy:
Klimek, M.
Łebkowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/375952.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
resource-constrained project scheduling
discounted cash flows
milestones
heuristics
Opis:
This paper presents a Resource-Constrained Project Scheduling Problem (RCPSP) settled by contractual milestones. The criterion analysed here is the maximisation of aggregate discounted cash flows from the contractor´s perspective, known as an RCPSP problem with Discounted Cash Flows (RCPSPDCF). The cash flows analysed here cover the contractor´s cash outflows (negative cash flows), related to the commencement of individual activities, and cash inflows (positive cash flows) after the fulfilment of individual milestones. The authors propose a two-phase algorithm for solving the problem defined. In the first phase, the simulated annealing metaheuristics is used, designed to identify a forward schedule with as high total DCF as possible. In the second phase, the best first-phase schedule is improved by right shifts of activities. To this end, the procedure which iteratively shifts tasks by one unit is applied, with a view to maximising the objective function. Activity shifts take into consideration precedence and resource constraints, and they are performed for a specified resource allocation to activities. This paper also includes an analysis of the problem for a sample project. The results of computational experiments are then analysed. The experiments were run with the use of standard test problems from the Project Scheduling Problem LIBrary (PSPLIB), with additionally defined cash flows and contractual milestones.
Źródło:
Decision Making in Manufacturing and Services; 2013, 7, 1-2; 51-68
1896-8325
2300-7087
Pojawia się w:
Decision Making in Manufacturing and Services
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accumulation of biomass and bioenergy in culms of cereals as a factor of straw cutting height
Autorzy:
Zając, Tomasz
Synowiec, Agnieszka
Oleksy, Andrzej
Macuda, Jan
Klimek-Kopyra, Agnieszka
Borowiec, Franciszek
Powiązania:
https://bibliotekanauki.pl/articles/972719.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
culm
internode
yielding
harvest index
harvest index energy
i
Opis:
Cereal straw is an important biomass source in Europe. This work assessed: 1) the morphological and energetic characteristics of culms of spring and winter cereals, 2) the energy deposited in the different aboveground parts of cereals, 3) losses of energy due to different cutting heights. The straw of winter and spring cereals was collected from arable fields during the seasons 2009/10 and 2010/11 in southern Poland. Detailed biometric measurements of culms and internodes were performed. The losses of straw biomass and energy were assessed during simulation of cutting the culm at different heights, up to 50 cm. Longer and heavier culms were developed by winter wheat and triticale and oat. Cutting of straw up to 10 cm did not lead to significant losses in straw yield. The total amount of energy in the culms was as follows: triticale > winter wheat > oat > spring wheat > winter barley > spring barley. Cutting the culms above 20 cm led to significant differences in terms of biomass energy between cereal species. The smallest losses of energy were recorded for spring and winter barley. Oat and barley accumulated the highest energy in grains.
Źródło:
International Agrophysics; 2017, 31, 2; 273-285
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An analysis of contemporary trends in the agritourism market in Poland
Autorzy:
Cichowska, J.
Klimek, A.
Powiązania:
https://bibliotekanauki.pl/articles/60659.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
trend
category
tourist
destination
rural tourism
rural market
tourism market
rural household
household
market economy
recreation
rural community
market development
Opis:
The degree of future development of agritourism will be strongly influenced by fashion trends that are dictated by the contemporary market. Changing lifestyles of the society, which manifest themselves in the pursuit of buying greener products and seeking unconventional ways of spending free time will further develop this service. Continuous improvement of service offers and introduction of more interesting forms of recreation that guarantee higher quality of services should become key goals for individuals involved in agritourism. The potential of agritourism is slowly being recognized, although in comparison to other forms of accommodation, still a rather small number of Polish tourists choose it. There is therefore a necessity to develop a marketing plan to make agritourism services more distinguishable on the local and foreign tourism markets. In order for rural areas to develop and to provide rural communities with additional sources of income, it undoubtedly seems necessary to differentiate between rural tourism and agritourism.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2011, 12
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An analysis of the chemistry, mineralogy and texture of waste dolomite powder used to identify its potential application in industry
Autorzy:
Gruszecka-Kosowska, A.
Wdowin, M.
Kosowski, T.
Klimek, A
Powiązania:
https://bibliotekanauki.pl/articles/184257.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
dolomite powder
heavy metals
waste utilization
mineralogical-chemical research
environmental protection
Opis:
In this work, characterization of dolomite powder was carried out in order to specify possible industrial applications. After the technological use of dolomite aggregates, the remaining fine powder becomes a waste. Raw and calcined powder samples were subject to mineralogical, textural and chemical studies involving leaching tests. The results of the calcination process indicate that the carbonate minerals present in the material sample undergo complete decomposition to form oxides. After the calcination, the material is practically non-porous, and its surface area is more than five times lower than that of the raw material. However, due to the high content of calcia in the calcined sample (CaO > 45% wt.), the material cannot be used as an additive in cement. The leaching tests showed that the concentration of metals released from the dolomite powder is low enough to classify the material as hazardous waste according to the TCLP test. Moreover, the concentration of metals that can get into the environment does not exceed permissible values as set by Polish law. Thus, it is recommended and justified to carry out detailed tests for the purpose of environmental protection; i.e. wet flue gas desulfurization, heavy metals absorption, and CO2 capture.
Źródło:
Geology, Geophysics and Environment; 2015, 41, 4; 343-352
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of selected accommodation conditions at agritourism farms based on the method of classification trees
Autorzy:
Cichowska, J.
Klimek, A.
Powiązania:
https://bibliotekanauki.pl/articles/62059.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
accommodation condition
classification tree
rural tourism farm
rural tourism
comparative analysis
farm
questionnaire method
sanitary infrastructure
hygiene infrastructure
rural infrastructure
household
residential building
Opis:
A comparative analysis, using the classification tree method, of typically agritourism and agriculturally inactive farms has been conducted in this paper. An interview questionnaire, carried out on 78 farms, has been applied as a research tool.According to the research, typically agritourism farms evaluated the quality of their own services more positively. However, these factors did not influence the improvement of offer standards. Perhaps they had to invest more often in the development of farms rather than focus on improving the sanitary and hygiene infrastructure. The residential buildings may have not been adapted to undergo redevelopment in that respect. Agriculturally inactive households rarely broadened their knowledge in order to improve accommodation conditions. They had higher standards regardless of the level of hosts' qualifications. Presumably, hosts who focus mainly on agritourism are more likely to improve accommodation conditions. They basically do not have to pay expenses that would be incurred by agricultural activity. The application of the classification tree method has allowed to observe that high self-evaluation of services provided does not always have to result in better sanitary equipment of rooms or possession of living rooms. The method has made it possible to present the examined factors in a simple graphical manner, thus allowing to notice differences between typically agritourism farms and agriculturally inactive farms.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2011, 12
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of yield and plant traits of oilseed rape (Brassica napus L.) cultivated in temperate region in light of the possibilities of sowing in arid areas
Analiza plonowania i cech morfologicznych rzepaku (Brassica napus L.) uprawianego w strefie klimatu umiarkowanego, w świetle możliwości siewu w klimacie suchym
Autorzy:
Zajac, T.
Klimek-Kopyra, A.
Oleksy, A.
Lorenc-Kozik, A.
Ratajczak, K.
Powiązania:
https://bibliotekanauki.pl/articles/28430.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Botaniczne
Opis:
This work is a review of selected literature on the species of Brassica with the greatest economic significance. Oilseed rape (Brassica napus ssp. oleifera) currently ranks third worldwide among oilseed crops used for oil production and is the most important in the temperate zone. The manifold uses of rape include not only human consumption of oil, but also the use of post-extraction meal to feed livestock as well as industrial applications as a source of bioenergy or cellulose. The improvement in the economic position of rape among crop plants is also due to the doubling of its yield between 1970 and 2009; the average annual increase in seed yield worldwide was 27 kg ha−1 yr−1. The yield level in Europe exceeds the average yields achieved in the world, particularly in Asia. Recently, the cultivation of oilseed rape was started on a relatively large acreage in Iran where the yield amounted 2.1 t ha−1, exceeding the yields of China and India. In Poland, the acreage of oilseed rape cultivation between 1965 and 2013 increased 3–4 times, and during this period the annual increase in seed yield was 29 kg ha−1 yr−1. Under the field conditions of the temperate climate zone, winter oilseed rape yield is mainly determined by agro-climatic conditions during the growing period, the level of nitrogen fertilization, and the production potential of varieties, which is currently highest in hybrids. There is a noticeable tendency of hybrids towards formation of more siliques by individual oilseed plants. Different production categories of plants appear in a rape crop. Semi-dwarf varieties of winter rapeseed are distinguished by greater silique density, particularly on the main shoot. Moreover, these hybrids are characterized by faster growth of the root system, which enables them to take up nitrogen from the soil more efficiently.
Praca stanowi przegląd wybranych pozycji literatury poświęconej uprawnym gatunkom z rodzaju Brassica. Skoncentrowana jest na wiodącym gospodarczo gatunku – kapusta rzepak (Brassica napus L. ssp. oleifera). Aktualnie rzepak to 3-cia roślina oleista świata, a najważniejsza dla umiarkowanej strefy klimatycznej. Głównym sposobem wykorzystania rzepaku jest przemysł spożywczy, ale wykorzystuje się również śrutę poekstrakcyjną w żywieniu zwierząt. Ważne jest również zastosowanie przemysłowe jako źródła bioenergii lub celulozy. Poprawa pozycji gospodarczej rzepaku wśród roślin rolniczych wynika także z podwojenia poziomu plonowania w okresie 1970–2009, gdy średnioroczny wzrost plonu nasion w skali świata wyniósł 27 kg ha−1 rok−1. W Polsce areał rzepaku w latach 1965–2013 wzrósł 3–4 krotnie, a coroczny przyrost plonu nasion zwiększał się o 29 kg ha−1 rok−1. W Europie poziom plonowania jest wyższy niż w świecie, a zwłaszcza w Azji. W ostatnim czasie podjęto uprawę rzepaku w Iranie, gdzie na stosunkowo dużym areale uzyskano plony nasion w wysokości 2.1 t ha−1, co przewyższa poziom plonowania w Chinach i Indiach. Plonowanie rzepaku ozimego w warunkach polowych strefy klimatu umiarkowanego determinują głównie warunki agroklimatyczne okresu wegetacji, poziom nawożenia azotem i potencjał produkcyjny odmian – aktualnie najwyższy u odmian mieszańcowych. Odmiany półkarłowe rzepaku ozimego odznaczają się większym zagęszczeniem łuszczyn, zwłaszcza na pędzie głównym. Ponadto mieszańce cechują się szybszym wzrostem systemu korzeniowego, który ma zdolność do lepszego pobierania azotu z gleby.
Źródło:
Acta Agrobotanica; 2016, 69, 4
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of biostimulants influences shoot and root characteristics of seedlings of winter pea (Pisum sativum L.)
Wpływ zastosowanych biostymulatorów na rozwój siewek grochu ozimego (Pisum sativum L.)
Autorzy:
Klimek-Kopyra, A.
Kliszcz, A.
Slizowska, A.
Kot, D.
Powiązania:
https://bibliotekanauki.pl/articles/27842.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Botaniczne
Opis:
In the cooler regions of Europe, the success of winter pea cultivation depends strongly on proper plant development before winter. Previous research has suggested that plants need to develop short internodes and at least their first two leaves before the arrival of frost. However, this stage of growth is sometimes not reached in the event of late sowing, due to factors such as unpredictable weather conditions or the delayed harvest of a previous crop. An effective solution may be the application of plant growth regulators before the sowing of seeds. The aim of this study was to assess the seedling developmental characteristics of winter pea dependent on biostimulator applications in low temperature conditions (4°C). Seven different winter pea cultivars were treated with three biostimulants: Asahi SL, Kelpak SL, and Primus B. After 21 days of seedling development, basic biometrical characteristics were measured (length and weight of shoots and roots). It was found that ‘Enduro’ and ‘Aviron’ showed greatest root development, regardless of the applied biostimulants. The highest germination was achieved by ‘Aviron’. The efficiency of biostimulators on the cultivars tested was low, although slightly better results were found for Asahi SL in combination with ‘Enduro’ and ‘Aviron’.
W chłodnych regionach Europy czynnikiem warunkującym pomyślną uprawę grochu ozimego (Pisum sativum L.) jest odpowiedni przedzimowy rozwój roślin. Dotychczasowe wyniki badań wskazują, że do dobrego przezimowania, rośliny powinny wykształcić krótkie międzywęźla i przynajmniej dwa liście przed wystąpieniem pierwszych przymrozków, W przypadku opóź-nionego terminu siewu, spowodowanego na przykład wahaniami pogodowymi lub opóźnionym zbiorem przedplonu, rośliny nie są w stanie rozwinąć się dostatecznie dobrze przed zimą. Rozwiązaniem tego problemu może być przedsiewne stosowanie regulatorów wzrostu. Celem przeprowadzonych badań było określenie wpływu biostymulatora na rozwój siewek grochu ozimego w warunkach niskiej temperatury (4°C). Siedem odmian grochu ozimego traktowano trzema biostymulatorami: Asahi SL, Kelpak SL i Primus B. Po 21 dniach rozwoju siewek grochu oceniono podstawowe cechy biometryczne (długość i masę części nadziemnych i korzeni). Najlepsze wartości parametrów korzeniowych odnotowano u odmian ‘Enduro’ oraz ‘Aviron’, niezależnie od zastosowanych biostymulatorów. Najlepiej kiełkowała odmiana ‘Aviron’. Wpływ biostymulatorów na rozwój siewek był niewielki, jednakże stwierdzono zacznie lepsze efekty przy zastosowaniu preparatu Asahi SL u odmian ‘Enduro’ i ‘Aviron’.
Źródło:
Acta Agrobotanica; 2019, 72, 2
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania SEM, EDS oraz dyfrakcji rentgenowskiej materiału mineral trioxide aggregate w symulowanych warunkach klinicznych
SEM, EDS and X-ray diffraction investigation of mineral trioxide aggregate properties in simulated clinical conditions
Autorzy:
Palatyńska-Ulatowska, A.
Klimek, L.
Powiązania:
https://bibliotekanauki.pl/articles/284658.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
mineral trioxide aggregate
elektronowy mikroskop skaningowy
dyfrakcja rentgenowska
SBF
cementogeneza
SEM
X-ray diffraction
cementogenesis
Opis:
Mineral trioxide aggregate (MTA) jest materiałem, którego zastosowanie wywołuje odpowiedź biologiczną polegającą na regeneracji przyczepu łączno-tkankowego tkanek przyzębia oraz odbudowie kości. Jednakże hipoteza wpływu MTA na procesy gojenia i odbudowy tkanek okołozębowych oraz mechanizmu tworzenia cementu korzeniowego pozostaje niejasna. Celem pracy było zbadanie wpływu płynu tkankowego SBF (Simulated Body Fluid) na materiał Pro Root MTA Grey w obecności twardych tkanek zęba. Z 10 zębów bydlęcych uzyskano 20 bloczków cementu korzeniowego. Po opracowaniu próbek i nałożeniu preparatu MTA Grey podzielono je na trzy równe grupy (I, II i III), po 6 próbek każda. Bloczki zębiny z grupy I zanurzono w 0,9% roztworze soli fizjologicznej (0,9% NaCl), bloczki z grupy II i III inkubowano w syntetycznym płynie tkankowym (roztwór SBF) odpowiednio przez 2 i 10 miesięcy. Wszystkie próbki umieszczono w temp. 37oC oraz 100% wilgotności. Po okresie inkubacji próbki poddano badaniu w elektronowym mikroskopie skaningowym, wykonano analizę spektroskopową EDS oraz badanie metodą dyfrakcji rentgenowskiej. Na powierzchniach próbek inkubowanych w SBF stwierdzono obecność związków fosforu i wapnia, jednak nie stwierdzono obecności kryształków hydroksyapatytu.
Mineral trioxide aggregate (MTA) is a material provoking a good biological reaction which may facilitate the regeneration of the periodontal ligament and formation of bone. However, the hypothesis of the dental alveolar healing and cement formation by the application of MTA has not been proven. The purpose of this study was to investigate the probable influence of the Simulated Body Fluid (SBF) on Grey Pro Root Mineral Trioxide Aggregate (GMTA) in the presence of the dental hard tissue. From 10 bovine extracted teeth, 20 samples of hard dental tissue were obtained. After the preparation and application of the GMTA material all of the samples were divided randomly into three groups (I, II, III), of 6 samples each. Dentine blocks in group I were incubated in 0.9% NaCl whilst those in groups II and III were incubated in SBF for 2 and 10 months, respectively, at 37oC, 100% humidity. SEM investigation, energy dispersive spectroscopy elemental analysis (EDS) and X-ray diffraction analysis of the samples were performed. On the surfaces of SBF incubated samples precipitation of phosphorus and calcium was indicated but no hydroxyapatite crystals were found.
Źródło:
Engineering of Biomaterials; 2009, 12, 85; 13-18
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł

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