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Wyświetlanie 1-15 z 51
Tytuł:
Variation in premaxillary tooth count and a developmental abnormality in a tyrannosaurid dinosaur
Autorzy:
Miyashita, T.
Tanke, D.H.
Currie, P.J.
Powiązania:
https://bibliotekanauki.pl/articles/23378.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
paleontology
tooth variation
premaxillary tooth
tooth
developmental abnormality
tyrannosaurid dinosaur
Dinosauria
Theropoda
Tyrannosauridae
tooth count
developmental regulation
Dinosaur Park Formation
Alberta city
Canada
Opis:
Premaxillary tooth count tends to be stable amongst toothed dinosaurs, and most theropods have four teeth in each premaxilla. Only one case of bilaterally asymmetric variation is known in theropod premaxillary dentition, and there is no record of ontogenetic or individual variation in premaxillary tooth count. Based on these observations, a tyrannosaurid left premaxilla with three teeth (TMP 2007.20.124) is an interesting deviation and represents an unusual individual of Daspletosaurus sp. with a developmental abnormality. The lower number of teeth is coupled with relatively larger alveoli, each of which is capable of hosting a larger than normal tooth. This indicates that tooth size and dental count vary inversely, and instances of reduction in tooth count may arise from selection for increased tooth size. On the other hand, the conservative number of premaxillary teeth in most theropods implies strong developmental constraints and a functional trade−off between the dimensions of the premaxillary alveolar margin and the size of the teeth. In light of recent advances in the study of tooth morphogenesis, tooth count is a function of two parameters: dimensions of an odontogenic field for a tooth series, and dimensions of tooth positions. A probable developmental cause for the low tooth count of TMP 2007.20.124 is that the dimensions of the alveoli expanded by approximately a third during tooth morphogenesis. Numerical traits such as tooth count are difficult to treat in a phylogenetic analysis. When formulating a phylogenetic character, a potential alternative to simply counting is to rely on the morphological signature for developmental parameters that control the number of the element in question.
Źródło:
Acta Palaeontologica Polonica; 2010, 55, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Udział polskich i zagranicznych odmian Lolium perenne L. w runi łąki pobagiennej
A share of Polish and foreign cultivars of Lolium perenne L. in the sward of postboggy meadow
Autorzy:
Kulik, M.
Baryła, R.
Warda, M.
Stamirowska-Krzaczek, E.
Domański, P.J.
Powiązania:
https://bibliotekanauki.pl/articles/11236672.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
laki pobagienne
run lakowa
Lolium perenne
odmiany roslin
odmiany krajowe
odmiany zagraniczne
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura; 2015, 70, 1; 51-60
0365-1118
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theropod teeth from the upper Maastrichtian Hell Creek Formation “Sue” Quarry: New morphotypes and faunal comparisons
Autorzy:
Gates, T.A.
Zanno, L.E.
Makovicky, P.J.
Powiązania:
https://bibliotekanauki.pl/articles/945614.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
paleontology
theropod
tooth
Upper Maastrichtian
Maastrichtian
Hell Creek Formation
morphotype
Dinosauria
morphometry
paleoecology
Cretaceous
North America
Opis:
Isolated teeth from vertebrate microfossil localities often provide unique information on the biodiversity of ancient ecosystems that might otherwise remain unrecognized. Microfossil sampling is a particularly valuable tool for documenting taxa that are poorly represented in macrofossil surveys due to small body size, fragile skeletal structure, or relatively low ecosystem abundance. Because biodiversity patterns in the late Maastrichtian of North American are the primary data for a broad array of studies regarding non-avian dinosaur extinction in the terminal Cretaceous, intensive sampling on multiple scales is critical to understanding the nature of this event. We address theropod biodiversity in the Maastrichtian by examining teeth collected from the Hell Creek Formation locality that yielded FMNH PR 2081 (the Tyrannosaurus rex specimen “Sue”). Eight morphotypes (three previously undocumented) are identified in the sample, representing Tyrannosauridae, Dromaeosauridae, Troodontidae, and Avialae. Noticeably absent are teeth attributed to the morphotypes Richardoestesia and Paronychodon. Morphometric comparison to dromaeosaurid teeth from multiple Hell Creek and Lance formations microsites reveals two unique dromaeosaurid morphotypes bearing finer distal denticles than present on teeth of similar size, and also differences in crown shape in at least one of these. These findings suggest more dromaeosaurid taxa, and a higher Maastrichtian biodiversity, than previously appreciated.
Źródło:
Acta Palaeontologica Polonica; 2015, 60, 1; 131-139
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theropod dinosaurs from the Upper Cretaceous of the South Pyrenees Basin of Spain
Autorzy:
Torices, A.
Currie, P.J.
Canudo, J.I.
Pereda-Suberbiola, X.
Powiązania:
https://bibliotekanauki.pl/articles/20400.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
The dinosaur record in the South Pyrenees Basin is diverse and rich. A total of 142 theropod teeth were studied for this paper, which constitutes one of the richest samples for these remains in Europe. Eight upper Campanian to upper Maastrichtian outcrops from the Pyrenees produced six non-avian theropod taxa (Theropoda indet., Coelurosauria indet., ?Richardoestesia, ?Dromaeosauridae indet., ?Pyroraptor olympius, ?Paronychodon). These six taxa are added to two previously described theropods (a Richardoestesia-like form and a possible ornithomimosaurid), indicating that there was considerable theropod diversity on the Iberian Peninsula during the Late Cretaceous.
Źródło:
Acta Palaeontologica Polonica; 2015, 60, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The teeth of the unenlagiine theropod Buitreraptor from the Cretaceous of Patagonia, Argentina, and the unusual dentition of the Gondwanan dromaeosaurids
Autorzy:
Gianechini, F.A.
Makovicky, P.J.
Apesteguia, S.
Powiązania:
https://bibliotekanauki.pl/articles/20408.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
tooth
unenlagiine theropod
theropod
Buitreraptor
Cretaceous
Patagonia
Argentina
dentition
Gondwanan dromaeosaurid
dromaeosaurid
Theropoda
Dromaeosauridae
Unenlagiinae
Dinosauria
paleontology
dinisaur tooth
Opis:
The Unenlagiinae is a clade of Gondwanan dromaeosaurid theropods mainly known from incomplete skeletal material. The group includes two recently discovered theropods, Buitreraptor and Austroraptor, from which cranial remains are available with in situ maxillary and dentary teeth, thus allowing the study of tooth morphology. Among the derived traits that diagnose the dentition of unenlagiines are: (i) high tooth count, (ii) small size of individual teeth when compared with skull height, (iii) absence of denticles and carinae, and (iv) presence of longitudinal grooves on the tooth crown. This suite of dental characteristics, shared between Buitreraptor and Austroraptor, can be considered as diagnostic of the Unenlagiinae or, at least, a more exclusive clade within the group. The teeth of Buitreraptor exhibit a remarkable labiolingual compression, whereas Austroraptor possesses more conical teeth, probably respective autapomorphic features. On one hand, these dental morphologies differ from those observed in most Laurasian dromaeosaurids and, for instance, could be considered as further proof of the purported vicariant evolution of the lineage on the southern continents. On the other hand, the morphological similarities (e.g., absence of denticles) between the teeth of unenlagiines and other theropod lineages, including Mesozoic birds and ornithomimosaurs, can be considered as the result of parallel trends related to dental reduction.
Źródło:
Acta Palaeontologica Polonica; 2011, 56, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The access project: agro-climatic change and European soil suitability - a spatially distributed soil, agro-climatic and soil hydrological model
Autorzy:
Loveland, P.J.
Powiązania:
https://bibliotekanauki.pl/articles/24798.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
soil hydrology
soil erosion
soil
land
hydrological model
soil suitability
Europe
climate change
Źródło:
International Agrophysics; 1996, 10, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Split Euler Tours In 4-Regular Planar Graphs
Autorzy:
Couch, PJ
Daniel, B.D.
Guidry, R.
Paul Wright, W.
Powiązania:
https://bibliotekanauki.pl/articles/31341188.pdf
Data publikacji:
2016-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
4-regular
3-connected
planar
split Euler tour
NP-complete
Opis:
The construction of a homing tour is known to be NP-complete. On the other hand, the Euler formula puts su cient restrictions on plane graphs that one should be able to assert the existence of such tours in some cases; in particular we focus on split Euler tours (SETs) in 3-connected, 4-regular, planar graphs (tfps). An Euler tour S in a graph G is a SET if there is a vertex v (called a half vertex of S) such that the longest portion of the tour between successive visits to v is exactly half the number of edges of G. Among other results, we establish that every tfp G having a SET S in which every vertex of G is a half vertex of S can be transformed to another tfp G′ having a SET S′ in which every vertex of G′ is a half vertex of S′ and G′ has at most one point having a face configuration of a particular class. The various results rely heavily on the structure of such graphs as determined by the Euler formula and on the construction of tfps from the octahedron. We also construct a 2-connected 4-regular planar graph that does not have a SET.
Źródło:
Discussiones Mathematicae Graph Theory; 2016, 36, 1; 23-30
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sklad chemiczny pierwszego odrostu odmian Lolium perenne w zroznicowanych warunkach siedliskowych
Autorzy:
Domanski, P.J.
Gospodarczyk, F.
Nowak, W.
Powiązania:
https://bibliotekanauki.pl/articles/75815.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Łąkarskie
Tematy:
warunki siedliskowe
sklad chemiczny
zycica trwala
trawy
Lolium perenne
Źródło:
Łąkarstwo w Polsce; 2003, 06; 201-207
1506-5162
Pojawia się w:
Łąkarstwo w Polsce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of climate change impacts on grain sorghum production grown under free air CO2 enrichment
Autorzy:
Fu, T.
Ko, J.
Wall, G.W.
Pinter,Jr., P.J.
Kimball, B.A.
Ottman, M.J.
Kim, H.-Y.
Powiązania:
https://bibliotekanauki.pl/articles/26201.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
crop simulation
climate change
grain yield
sorghum
Sorghum bicolor
productivity
plant production
carbon dioxide
Źródło:
International Agrophysics; 2016, 30, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected risk factors for ischemic heart disease and the success of treatment in patients with STEMI myocardial infarction treated with percutaneous coronary intervention
Autorzy:
Jędrzejczyk-Cwanek, M.
Gurowiec, P.J.
Ozga, D.
Powiązania:
https://bibliotekanauki.pl/articles/2087710.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Opolski. Instytut Nauk o Zdrowiu
Tematy:
myocardial infarction
risk factors
ischemic heart disease
Opis:
Background: Coronary heart disease is one of the most common causes of hospitalization and premature deaths in Europe. ST-segment elevation myocardial infarction (STEMI) has been a clinical problem for many years, particularly in the aspect of choosing the optimal treatment method. The success of treatment is determined by many factors, including risk factors for ischemic heart disease, time between onset of symptoms and initiation of treatment, number and degree of coronary stenosis, and many more. Aim of the study: The aim of the study was to identify risk factors for ischemic heart disease affecting the success of STEMI patients treated with percutaneous coronary intervention (PCI). Material and methods: A retrospective analysis was carried out on data from medical records of patients treated in the Department of Acute Coronary Syndromes of St. Hedvig Provincial Hospital No. 2 in Rzeszow between 2009 and 2014. The research tool used in this paper was the author’s questionnaire. A total of 508 patients with STEMI myocardial infarction treated in the Department of Acute Coronary Syndromes (ACS) between 2009 and 2013 were included in the analysis. The inclusion criteria were the complete and clear files of patient treatment in the ACS department between 2009 and 2013 due to acute coronary syndrome treated invasively by the PCI method. Results: Majority of the study group, 334 subjects, (65.7%) had hypertension. The most common risk factors for ischemic heart disease were found to be dyslipidemia in 176 subjects (34.6%) and smoking in 163 subjects (32.1%). This paper presents the results of the analysis of the success of treatment in relation to risk factors for ischemic heart disease. There was a statistically significant relationship between hypertension and successful treatment (p=0.0425). More cases in which treatment was unsuccessful were observed in the group of patients who had no previous treatment for lipid disorders (20.2% vs. 4.0%) (p = 0.0000). Significantly more cases of treatment failure were found among people who denied smoking (17.4% vs. 8.6%; p = 0.0087). Conclusions: Among the analyzed behavioral and somatic risk factors for failure in patients subjected to treatment were untreated hypertension, hyperlipidemia and a negative history of cigarette smoking.
Źródło:
Medical Science Pulse; 2020, 14, 3; 49-54
2544-1558
2544-1620
Pojawia się w:
Medical Science Pulse
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of VIsE/C6 antigen as a marker for early Lyme borreliosis diagnosis and monitoring the effectiveness of its treatment
Znaczenie antygenu VIsE/C6 jako markera w diagnostyce wczesnej boreliozy z Lyme i badaniu skuteczności jej leczenia
Autorzy:
Krzemień, P.J.
Powiązania:
https://bibliotekanauki.pl/articles/2052673.pdf
Data publikacji:
2017
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
VlsE
C6
Lyme borreliosis
Borrelia burgdorferi
serology
borelioza z Lyme
serologia
Opis:
Diagnosing Lyme borreliosis, despite years of standardization, continues to encounter difficulties. They result primarily from the lack of a good marker of active infection and one helpful in assessing the effectiveness of the treatment. So far, a certain diagnosis of Lyme borreliosis can be made only in a patient with erythema migrans (EM). Unfortunately, this symptom occurs only in some patients. According to the recommendations of the Polish Society of Epidemiologists and Doctors of Infectious Diseases, the effectiveness of treatment is determined by the disappearance of clinical symptoms. For this reason, for years, we have been looking for highly sensitive and diagnostically specific laboratory markers. These would allow for rapid identification of fresh infections with Borrelia spirochetes as well as simple monitoring of treatment efficacy. According to many of the recently published publications, the solution to the second of the presented problems may be the measurement of IgG antibodies to the surface antigen of Borrelia burgdorferi s.l. VlsE / C6.
Diagnostyka boreliozy z Lyme, pomimo iż od lat jest wystandaryzowana, nadal spotyka się z kilkoma problemami. Wynikają one przede wszystkim z braku dobrego markera aktywnej infekcji, oraz markera pomocnego w ocenie skuteczności leczenia. Jak dotąd, pewne rozpoznanie boreliozy z Lyme można postawić jedynie w przypadku wystąpienia u pacjenta rumienia wędrującego (EM - Erythema migrans). Niestety objaw ten występuje tylko u części pacjentów. Według rekomendacji Polskiego Towarzystwa Epidemiologów i Lekarzy Chorób Zakaźnych za podstawę oceny skuteczności leczenia uważa się zanik objawów klinicznych. Z tego powodu od lat poszukuje się markerów laboratoryjnych, które z wysoką czułością i specyficznością diagnostyczną pozwalałyby z jednej strony na szybkie rozpoznanie świeżych infekcji krętkami Borrelia, a z drugiej na proste monitorowanie skuteczności leczenia. Według wielu spośród pojawiających się w ostatnich latach publikacji rozwiązaniem drugiego z przedstawionych problemów może być pomiar przeciwciał IgG przeciwko antygenowi powierzchniowemu Borrelia burgdorferi s.l. VlsE/C6.
Źródło:
Health Problems of Civilization; 2017, 11, 2; 87-92
2353-6942
2354-0265
Pojawia się w:
Health Problems of Civilization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pseudoloma neurophilia (Microsporidia) - poważne zagrożenie dla hodowli laboratoryjnej danio pręgowanego (Danio rerio, Hamilton 1822)
Pseudoloma neurophilia (Microsporidiosis) - a serious threat to the husbandry of laboratory zebrafish (Danio rerio, Hamilton 1822
Autorzy:
Korzeniowski, P.J.
Wiweger, M.
Powiązania:
https://bibliotekanauki.pl/articles/858944.pdf
Data publikacji:
2016
Wydawca:
Krajowa Izba Lekarsko-Weterynaryjna
Źródło:
Życie Weterynaryjne; 2016, 91, 11
0137-6810
Pojawia się w:
Życie Weterynaryjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positive and negative effects of trauma in patients after myocardial infarction: the role of type D personality
Autorzy:
Ogińska-Bulik, N.
Gurowiec, P.J.
Powiązania:
https://bibliotekanauki.pl/articles/2087937.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Opolski. Instytut Nauk o Zdrowiu
Tematy:
trauma
posttraumatic stress
posttraumatic growth
type D personality
myocardial infarction
Opis:
Background: Experiencing a myocardial infarction threatens the health and life of the patient; therefore, it can be perceived as a traumatic event. Indeed, myocardial infarction may result in negative consequences, including symptoms of posttraumatic stress disorder (PTSD). However, it is also possible to experience positive effects from traumatic events, which is expressed as posttraumatic growth. Personality characteristics, including type D (i.e., distressed) personality, are among several factors that have been shown determine the occurrence of negative and positive consequences after exposure to trauma. Aim of the study: The aim of the present study was to establish the role of distressed personality in the occurrence of negative and positive effects of trauma resulting from myocardial infarction. Material and methods: The study included a total of 80 patients after myocardial infarction. Sixty-three patients aged 43–85 years (M=67, SD=10.76) were included in the final analysis. The majority of respondents were men (61.9%). Patients completed a survey with three standardized measurement tools: the PTSD Checklist for DSM-5 (PCL-5), the Posttraumatic Growth Inventory (PTGI), and the Type D Scale (DS-14). Results: Negative affectivity was positively associated with PTSD symptoms, and this association was strongest for negative changes in cognition or mood. Social inhibition was not associated with PTSD symptoms, except for increased arousal and reactivity. Both dimensions of type D personality were positively related to one factor of posttraumatic growth: changes in the spiritual sphere. Conclusions: Reducing the severity of negative affectivity may decrease PTSD symptoms and thus contribute to improved psychosocial functioning among patients who have experienced myocardial infarction.
Źródło:
Medical Science Pulse; 2020, 14, 2; 49-54
2544-1558
2544-1620
Pojawia się w:
Medical Science Pulse
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polyarmonic model of synchronous generator for analysis of autonomous power generation systems
Autorzy:
Kutt, F.
Michna, M.
Ronkowski, M.
Chrzan, P.J.
Powiązania:
https://bibliotekanauki.pl/articles/1372704.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
generator synchroniczny
maszyna elektryczna
model poliharmoniczny
synchronous generator
electric machine
polyharmonic model
Opis:
This paper presents the polyharmonic modelling of synchronous generator (SG) in machine variables. The simple geometry and windings physical layout has been used for inductance calculations of a salient-pole SG. The main advantage of this model is the ease of describing an autonomous power generation system (APGS) in terms of its topology and thus providing effective analysis at the static and dynamic states, both for normal and fault operations. Particularly, the model can be used to obtain SG voltage and currents for their more extensive harmonic analysis. Comparison of the simulation and measurement results has shown their good agreement, i.e., validating the elaborated polyharmonic model of SG.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2011, 4, 92; 109-114
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
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