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Wyświetlanie 1-15 z 81
Tytuł:
Effect of experimental infections of various Tembusu virus strains isolated from geese, ducks and chickens on ducklings
Autorzy:
Xu, T.
Huang, X.
Li, Y.
Liu, Q.
Liu, X.
Han, K.
Liu, Y.
Yang, J.
Zhao, D.
Bi, K.
Sun, W.
Powiązania:
https://bibliotekanauki.pl/articles/2087719.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
goose-derived
duck-derived
chicken-derived
Tembusu virus
pathogenicity
Źródło:
Polish Journal of Veterinary Sciences; 2018, 21, 2; 389-396
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Derywowane nazwiska odzawodowe w dokumentach poznańskich od XVI do XVIII wieku
Profession-Derived Names in Poznań Documents of the 16th-18th Centuries
Autorzy:
Sieradzki, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/911077.pdf
Data publikacji:
2014-01-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Poznań surnames
derived surnames
profession-derived surnames
Opis:
The subject of studies of the article is the word-formation structure of the names moti-vated by the designations of professions. The analyses are conducted only at the level of the language system. The collected material does not allow us to conduct such analyses at the text level. The completed studies showed that most often nominal derivatives of the discussed type were formed with the use of word-formative models with formatives -czyk, -ski. Relatively high frequency represent the formatives with a basic -k. This kind of distribution of the form-atives indicates the exceptionality of this category of names, its close relationship with the formation of profession-derived nouns at the appellative level. The models according to which the profession-derived names were formed indicate great synonymity. These names create even five-part series, which never occurs in other nominal types. 
Źródło:
Poznańskie Spotkania Językoznawcze; 2014, 27; 163-171
2082-9825
2450-0259
Pojawia się w:
Poznańskie Spotkania Językoznawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The dimension of a variety
Autorzy:
Graczyńska, Ewa
Schweigert, Dietmar
Powiązania:
https://bibliotekanauki.pl/articles/729143.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
derived algebras
derived varieties
the dimension of a variety
Opis:
Derived varieties were invented by P. Cohn in [4]. Derived varieties of a given type were invented by the authors in [10]. In the paper we deal with the derived variety $V_{σ}$ of a given variety, by a fixed hypersubstitution σ. We introduce the notion of the dimension of a variety as the cardinality κ of the set of all proper derived varieties of V included in V.
We examine dimensions of some varieties in the lattice of all varieties of a given type τ. Dimensions of varieties of lattices and all subvarieties of regular bands are determined.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2007, 27, 1; 35-47
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Osteogenic differentiation of human mesenchymal stem cells from adipose tissue and Whartons jelly of the umbilical cord
Autorzy:
Zajdel, Alicja
Kałucka, Magdalena
Kokoszka-Mikołaj, Edyta
Wilczok, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1038664.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
adipose derived mesenchymal stem cells
Wharton's jelly derived mesenchymal stem cells
osteogenic differentiation
Opis:
Induced osteogenesis of mesenchymal stem cells (MSCs) may provide an important tool for bone injuries treatment. Human umbilical cord and adipose tissue are routinely discarded as clinical waste and may be used as noncontroversial MSCs sources. It still remains to be verified which source of MSCs is the most suitable for bone regeneration. The aim of this research was to investigate the osteogenic potential of human MSCs derived from adipose tissue (AT-MSCs) and Wharton's jelly of the human umbilical cord (WJ-MSCs) differentiated under the same conditions. Osteogenic differentiation of MSCs was detected and quantified by alizarin red S (ARS) staining for calcium deposition and alkaline phosphatase (ALP) activity, osteoprotegerin (OPG), and osteocalcin (OC) secretion measurements. Under osteogenic conditions, after 21 days of differentiation, the measured ALP activity and calcium deposition were significantly higher in the AT-MSCs than in the WJ-MSCs, while the OPG and OC secretion were higher in the WJ-MSCs vs. AT-MSCs. Low concentrations of OPG and high levels of OC in AT-MSCs and WJ-MSCs, prove that these cells reached an advanced stage of the osteogenic differentiation. The levels of OC secreted by AT-MSCs were lower than by WJ-MSCs. Both cell types, AT-MSCs and WJ-MSCs possess a potential to differentiate towards the osteogenic lineage. The observed differences in the levels of osteogenic markers suggest that after 21-days of osteogenic differentiation, the AT-MSCs might have reached a more advanced stage of differentiation than WJ-MSCs.
Źródło:
Acta Biochimica Polonica; 2017, 64, 2; 365-369
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ex-translational function of tRNAs and their fragments in cancer
Autorzy:
Mleczko, Anna
Celichowski, Piotr
Bąkowska-Żywicka, Kamilla
Powiązania:
https://bibliotekanauki.pl/articles/1039278.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
tRNA
tRNA-derived fragments
cancer
Opis:
Transfer RNA (tRNA) molecules are most commonly known as the molecular amino acids carriers and also because of the role they play in a protein biosynthesis process. However, tRNA biology has revealed stupendous levels of many unexpected discoveries that put a new light on tRNA function in different processes besides translation, like apoptosis or cancer development. In recent years various species of RNAs have been found differentially expressed in different types of cancer. In this review we focus our attention on tRNAs as well as on tRNA-derived small RNAs ex-translational functions in human cells in oncogenesis and oncobiology.
Źródło:
Acta Biochimica Polonica; 2014, 61, 2; 211-216
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiplicative Zagreb indices and coindices of some derived graphs
Autorzy:
Basavanagoud, B.
Patil, S.
Powiązania:
https://bibliotekanauki.pl/articles/256021.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
multiplicative Zagreb indices and coindices
derived graphs
Opis:
In this note, we obtain the expressions for multiplicative Zagreb indices and coindices of derived graphs such as a line graph, subdivision graph, vertex-semitotal graph, edge-semitotal graph, total graph and paraline graph.
Źródło:
Opuscula Mathematica; 2016, 36, 3; 287-299
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An attempt to identify traffic related elements in snow
Autorzy:
Adamiec, E.
Wieszała, R.
Strzebońska, M.
Jarosz-Krzemińska, E.
Powiązania:
https://bibliotekanauki.pl/articles/184678.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
traffic
parking lot
snow
vehicle-derived element
Opis:
The main objective of this article is an attempt to use snow as an indicator in the process of assessing and identifying vehicle-derived elements pollution. The aim of the present study is to characterize traffic-related elements in snow collected from three sites: a parking place, a highway and a relatively unpolluted airfield. Several recent studies suggest that road traffic is considered to be one of the major sources of environmental pollution in urban areas. In order to avoid the problem of low emission from household furnaces, samples were collected far away from residential buildings. Snow located near roads with heavy traffic seems to be a very useful tool and indicator of traffic-related elements released into the environment. Snow acts as a natural filter for various chemical elements and particles. Snow is an efficient scavenger of aerosol and air pollutants, usually remains on the ground for sampling after the event; moreover, snowmelt contaminates soil. In the present study filtered (0.45 um) samples of melted snow were analyzed with ICP-MS. The results show significantly higher concentrations of elements in snow collected at the parking lot and at the highway when compared to samples taken from a relatively unpolluted airfield. Research on exploitation dust (break, tire, clutch) was performed with SEM-EDS.
Źródło:
Geology, Geophysics and Environment; 2013, 39, 4; 317-329
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Endothelium as target for large-conductance calcium-activated potassium channel openers
Autorzy:
Wrzosek, Antoni
Powiązania:
https://bibliotekanauki.pl/articles/1040527.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
endothelium-derived hyperpolarising factor
potassium channels
endothelium
Opis:
The endothelium is a highly active organ responsible for vasculatory tone and structure, angiogenesis, as well as hemodynamic, humoral, and inflammatory responses. The endothelium is constantly exposed to blood flow, sheer stress and tension. Endothelial cells are present as a vasculature in every tissue of the body and react to and control its microenvironment. A variety of ion channels are present in the plasma membranes of endothelial cells. These include potassium channels such as inwardly rectifying potassium (Kir) channels, voltage-dependent (Kv) channels, ATP-regulated potassium (KATP) channels and three types of calcium-activated potassium channels (KCa), the large (BKCa), intermediate (IKCa), and small (SKCa) -conductance potassium channels. Potassium current plays a critical role in action potentials in excitable cells, in setting the resting membrane potential, and in regulating neurotransmitter release. Mitochondrial isoforms of potassium channel contribute to the cytoprotection of endothelial cells. Prominent among potassium channels are families of calcium-activated potassium channels, and especially large-conductance calcium-activated potassium channels. The modulation of BKCa channels, which are voltage- and calcium-dependent, has been intensively studied. The BKCa channels show large expression dynamics in endothelial cells and tissue-specific expression of large numbers of alternatively spliced isoforms. In this review, a few examples of the modulatory mechanisms and physiological consequences of the expression of BKCa channels are discussed in relation to potential targets for pharmacological intervention.
Źródło:
Acta Biochimica Polonica; 2009, 56, 3; 393-404
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of potyvirus terminal protein VPg-transgenic Arabidopsis thaliana plants
Autorzy:
Wojtal, Izabela
Piontek, Paulina
Grzela, Renata
Jarmołowski, Artur
Zagórski, Włodzimierz
Chroboczek, Jadwiga
Powiązania:
https://bibliotekanauki.pl/articles/1039885.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
VPg protein
Potyvirus
pathogen-derived resistance
transgenic plant
Opis:
Virus-coded VPg protein of Potato virus Y (PVY) does not have homologs apart from other VPgs. Since VPg is indispensable for the potyvirus life cycle, it appeared a good candidate for eliciting pathogen-derived resistance to PVY. Following agroinfection used to obtain PVY VPg-transgenic Arabidopsis thaliana plants, only few transgenic seeds were recovered giving rise to six transgenic plants that contained the VPg gene with the correct sequence. They generated VPg mRNA, but VPg protein was not detected. Some plants were immune to PVY infection suggesting post-transcriptional gene silencing. However, the likely PVY VPg toxicity exerted at an early stage of transformed seeds development precludes its use for engineering pathogen-derived resistance.
Źródło:
Acta Biochimica Polonica; 2011, 58, 3; 349-353
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mapping South Baltic near-shore bathymetry using sentinel-2 observations
Autorzy:
Chybicki, A.
Powiązania:
https://bibliotekanauki.pl/articles/259485.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
near-shorel satellite
derived
bathymetry
Sentinel
multispectra
observation
Opis:
One of the most promising new applications of remote observation satellite systems (RO) is the near-shore bathymetry estimation based on spaceborn multispectral imageries. In recent years, many experiments aiming to estimate bathymetry in optically shallow water with the use of remote optical observations have been presented. In this paper, optimal models of satellite derived bathymetry (SDB) for relatively turbid waters of the South Baltic Sea were presented. The obtained results were analysed in terms of depth error estimation, spatial distribution, and overall quality. The models were calibrated based on sounding (in-situ) data obtained by a single-beam echo sounder, which was retrieved from the Maritime Office in Gdynia, Poland. The remote observations for this study were delivered by the recently deployed European Space Agency Sentinel-2 satellite observation system. A detailed analysis of the obtained results has shown that the tested methods can be successfully applied for the South Baltic region at depths of 12-18 meters. However, significant limitations were observed. The performed experiments have revealed that the error of model calibration, expressed in meters (RMSE), equals up to 10-20% of the real depth and is, generally, case dependent. To overcome this drawback, a novel indicator of determining the maximal SDB depth was proposed. What is important, the proposed SDB quality indicator is derived only on the basis of remotely registered data and therefore can be applied operationally.
Źródło:
Polish Maritime Research; 2017, 3; 15-25
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the Flight Loads Spectra of Two Business Jets
Autorzy:
Kliment, L. K.
Rokhsaz, K.
Powiązania:
https://bibliotekanauki.pl/articles/97863.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
load spectrum
derived gust velocity
business jet operations
Opis:
Operational flight loads have been analyzed from two business jets, a Global 5000 and a Global Express XRS. It is shown that both airframes were subjected to nearly the same number of ground-air-ground cycles, even though the flight times were much different. Flights have been divided into various phases, and loads and turbulence data have been categorized by altitude bands within each phase. Cumulative occurrences of incremental vertical gust load factors have been compared and shown to be comparable for the two airframes. Maneuver load factors have been shown to spread over a wider range of values for the 5000 in every phase. This has been confirmed through comparison of combined loads with those from a CRJ100 and an ERJ-145XR. Derived gust velocities, obtained from the load factors are presented in the form of exceedance spectra. These results from both aircraft are shown to agree well.
Źródło:
Fatigue of Aircraft Structures; 2014, 6; 5-20
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A misinterpretation of Keyness concept of involuntary unemployment
Autorzy:
Grieve, Roy H.
Powiązania:
https://bibliotekanauki.pl/articles/22446546.pdf
Data publikacji:
2018
Wydawca:
Instytut Badań Gospodarczych
Tematy:
voluntary unemployment
derived demand for labour
involuntary unemployment
Opis:
Research background: One of the principal contributions of Maynard Keynes?s General Theory was identification of the phenomenon of involuntary unemployment, due (on account of adverse expectations and confidence on the part of potential buyers) to a want of demand for the quantity of output which a fully-employed labour force was capable of producing.  Such unemployment, he insisted ? contrary to conventional opinion ? was not due to workers pricing themselves out of work by demanding wages higher than employers could afford.  Far from unemployed workers being themselves responsible for their plight, they were, in reality, victims of circumstances beyond their control. Keynes?s understanding was, for many years, widely accepted by academics, policy-makers and the general public. In recent times, however, mainstream macroeconomic theory has shown a regrettable tendency to return to old modes of thinking. Blame for unemployment is again put on the workforce, whose alleged misunderstanding or slow response to change are said to imply seeking employment on unrealistic terms. A more extreme view is that worklessness may reflect a deliberate choice of leisure. To anyone sceptical of the validity of such analyses there is a clear need to recover the Keynesian understanding of the possibility not just of frictional or voluntary, but also of involuntary unemployment.  Purpose of the article:  Ezra Davar, recognising that it is important not to lose sight of the idea of involuntary unemployment, has recently attempted in this Journal to explain Keynes?s concept. Unfortunately, however, he fails to recognise that Keynes accounted for involuntary unemployment as resulting from deficiency of aggregate demand for output, not as  the consequence of any supply-side factor. In attributing involuntary unemployment to a peculiarity in the labour supply function Davar quite misses Keynes?s point, and in fact identifies as involuntary unemployment a situation of what Keynes would have described as ?voluntary? employment. The objective of the present note is to clear up this misunderstanding.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2018, 13, 2; 331-348
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PDGF-BB homodimer serum level – a good indicator of the severity of alcoholic liver cirrhosis
Autorzy:
Kurys-Denis, E.
Prystupa, A.
Luchowska-Kocot, D.
Krupski, W.
Bis-Wencel, H.
Panasiuk, L.
Powiązania:
https://bibliotekanauki.pl/articles/2085441.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Tematy:
alcohol
liver cirrhosis
Child-Pugh score
platelet derived growth factor AA
platelet growth factor AB
platelet derived
growth factor BB
Opis:
Introduction. Liver cirrhosis is a chronic disease in which progressive fibrosis is noted. This process leads to changed architectonics of the liver parenchyma and the appearance of regenerative nodules, all of which are caused by pathological activation of the hepatic stellate cells. This process is enhanced on a molecular level by many cytokines, with platelet-derived growth factors (PDGFs) playing the key role. Objective. The aim of the study was to assess serum concentrations of PDGFs active biodymers (PDGF-AA, PDGF-BB and PDGF-AB) in patients with alcoholic liver cirrhosis, and to correlate them with the stage of disease. Materials and method. 64 patients with alcoholic cirrhosis and a control group of 16 healthy individuals were analysed. Liver cirrhosis was determined based on clinical image, history of the patients’ alcohol consumption, laboratory findings and abdominal ultrasonography. The serum PDGF-AA, PDGF-BB and PDGF-AB concentrations were determined using ELISA kits. Results. Serum concentration of PDGF-AA and PDGF-BB homodimers increases in patients with alcoholic liver cirrhosis (p=0.034 and p<0.0001, respectively), unlike the serum concentration of PDGF-AB heterodimer (p>0.05). When the stage of the disease increases, the concentrations of PDGF-AA and PGFD-BB in blood also oncrease. Furthermore, the serum level of both PDGF-AA and PDGF-BB correlates significantly with the severity of alcoholic liver cirrhosis (measured by Pugh-Child’s scale), the correlation being stronger in the case of PDGF-BB levels than PDGF-AA (R=0.28; p=0.027 and R=0.26; p=0.038, respectively). Conclusions. The plasma levels of PDGF-AA and -BB may be indicators of alcohol-induced liver fibrosis process, and might be considered as future possible treatment targets, with PDGF-BB levels being an even better indicator than PDGF-AA levels.
Źródło:
Annals of Agricultural and Environmental Medicine; 2020, 27, 1; 80-85
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nazwiska polskie i ich wschodniosłowiańskie ekwiwalenty jako odzwierciedlenie historycznego osadnictwa na Podlasiu
The Polish names and their Eastern Slavic equivalents as the reflection of the historical settlement in Podlasie
Польские фамилии и их восточнославянские эквиваленты как отражение исторического заселения на территории Подлясья
Autorzy:
Dacewicz, Leonarda
Powiązania:
https://bibliotekanauki.pl/articles/1953562.pdf
Data publikacji:
2005
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
nazwiska
odapelatywne. odimienne
wartościowanie
frekwencja
lokalizacja
surname
name derived from the appellative. name derived from the Christian name
evaluating
frequency
localization
Opis:
Целью статьи является объяснение причин и пределов выступания восточно- славянских эквивалентов польских фамилий, опираясь на конкретные экземплификации. Явление, состоящее в том, что существуют параллельные формы фамилий, автор статьи представляет на примере более десяти подобно звучащих фамилий, возникших на основе называющих одинаковые объекты апеллятивов.
Źródło:
Roczniki Humanistyczne; 2005, 53, 7; 153-159
0035-7707
Pojawia się w:
Roczniki Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production and use of waste-derived fuels in Poland: current status and perspectives
Autorzy:
Bień, Jurand
Powiązania:
https://bibliotekanauki.pl/articles/1839563.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
paliwa alternatywne
odrzucone paliwa pochodne OPB
produkcja RDF
odzyskiwanie energii
waste-derived fuels
refused derived fuels RDF
RDF production
energy recovery
Opis:
In the paper issues related to the production and utilisation of waste-derived fuel (alternative fuel) in Poland are presented. Alternative fuel comes from dry residue of waste, mostly municipal, and is treated as a waste. In European Waste Catalogue waste-derived fuel is marked with 191210 code despite their municipal, industrial or mixed origin. The production and utilisation of alternative fuel were analysed with the data from sixteen polish voivodships’ annual reports. The total amount of waste-derived fuel produced in Poland exceeds 3 million tonnes annually. It means there is no balance between the amount of production and possibility of energy recovery in Poland. In 2018 only 1,54 million tons was recovered in R1 recovery process which is only half of the waste-derived fuel produced. In addition, the entire amount of fuel is used in the cement industry. In 2018 in the cement industry 1,46 millions tons of alternative fuel was used. It is estimated that the potential use of alternative fuel by cement plants in Poland is about 1.5-1.8 million tonnes. This means that greater use of alternative fuel in the cement sector is significantly limited. The difference between in the amount of fuel produced and the amount of fuel used for energy recovery in 2018 is around 1.67 million tons. This situation has a significant impact on the economy of waste management in the field of combustible waste production.
Źródło:
Production Engineering Archives; 2021, 27, 1; 36-41
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 81

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