47 research outputs found
Shale Gas in Poland
An example of interpretation of the Silurian and Ordovician shale formations in the Baltic Basin in Poland regarding determination of potential sweet spots is presented. Short geological information shows the position of shale gas play. Description of the data—laboratory measurement outcomes (petrophysical and geochemical) and well logging—presents results available for analyses. Detailed elemental analyses and various statistical classifications show the differentiation between sweet spots and adjacent formations. Elastic property modelling based on the known theoretical models and results of comprehensive interpretation of well logs is a good tool to complete information, especially in old wells. Acoustic emission investigations show additional characteristic features of shale gas rock and reveal that acoustic emission and volumetric strain of a shale sample induced by the sorption processes are lower for shale than for coals
Dynamic cerebral autoregulation is compromised in ischaemic stroke of undetermined aetiology only in the non-affected hemisphere
Background and purpose: To assess dynamic cerebral autoregulation (CA) in patients with
acute ischaemic stroke of undetermined aetiology, within 72 h of stroke onset.
Materials and methods: In 6 patients with ischaemic stroke of undetermined aetiology (aged
66 9 years, National Institutes of Health Stroke Scale [NIHSS] score on admission: 4.0,
range: 4–11), selected based on screening of 118 consecutive ischaemic stroke patients and in
14 volunteers (aged 62 10 years), we continuously monitored RR intervals (RRI), mean
arterial pressure (MAP) by means of photoplethysmography, mean cerebral blood flow
velocity (CBFV) using transcranial Doppler ultrasonography, end-tidal CO2 (ETCO2) and
respiration during 2-min deep breathing paced at 6 min1 (0.1 Hz). To assess CA, we
evaluated the impact of breathing-induced MAP oscillations on fluctuations of CBFV in
the hemispheres with stroke, the non-involved hemispheres and randomly selected hemispheres of controls by applying cross-spectral analysis and calculating coherence, transfer
function gain (CBFV–MAP gain) and phase shift angle between the two oscillating signals.
Results: Phase shift angle between MAP and CBFV oscillations showed values >0 and was
significantly reduced in the hemispheres without stroke as compared to controls (0.39 0.95
vs. 1.59 0.33 rad, p = 0.015), whereas in the hemispheres with stroke, phase shift angle did
not differ significantly from that observed in the control hemispheres. Clinical status of
stroke patients significantly improved at discharge from the hospital (NIHSS: 2.0, range: 1–8,
p = 0.028).
Conclusions: During the first days of ischaemic stroke of undetermined aetiology, dynamic
cerebral autoregulation is compromised in the non-affected hemisphere, but not in the
hemisphere with ischaemic lesio
National comparison of methods for determination of radon in water
The article describes three interlaboratory experiments concerning 222Rn determination in water samples.
The fi rst two experiments were carried out with the use of artifi cial radon waters prepared by the Laboratory
of Radiometric Expertise (LER), Institute of Nuclear Physics, Polish Academy of Sciences in Kraków in 2014
and 2018. The third experiment was performed using natural environment waters collected in the vicinity of the
former uranium mine in Kowary in 2016. Most of the institutions performing radon in water measurements in
Poland were gathered in the Polish Radon Centre Network, and they participated in the experiments. The goal of
these exercises was to evaluate different measurement techniques used routinely in Polish laboratories and the
laboratories’ profi ciency of radon in water measurements. In the experiment performed in 2018, the reference
values of 222Rn concentration in water were calculated based on the method developed at LER. The participants’
results appeared to be worse for low radon concentration than for high radon concentrations. The conclusions
drawn on that base indicated the weaknesses of the used methods and probably the sampling. The interlaboratory
experiments, in term, can help to improve the participants’ skills and reliability of their results
Humanities for the Future: a new European Agenda
FGW – Publications not associated with a particular research are
Lack of CD151/integrin alpha 3 beta 1 complex is predictive of poor outcome in node-negative lobular breast carcinoma: opposing roles of CD151 in invasive lobular and ductal breast cancers
background: The proposed involvement of CD151 in breast cancer (BCa) progression is based on findings from studies in invasive ductal carcinoma (IDC). The IDC and invasive lobular carcinoma (ILC) represent distinct disease entities. Here we evaluated clinical significance of CD151 alone and in association with integrin α3β1 in patients with ILC in context of the data of our recent IDC study. methods: Expression of CD151 and/or integrin α3β1 was evaluated in ILC samples (N=117) using immunohistochemistry. The findings were analysed in relation to our results from an IDC cohort (N=182) demonstrating a prognostic value of an expression of CD151/integrin α3β1 complex in patients with HER2-negative tumours. results: Unlike in the IDCs, neither CD151 nor CD151/α3β1 complex showed any correlation with any of the ILC characteristics. Lack of both CD151 and α3β1 was significantly correlated with poor survival (P=0.034) in lymph node-negative ILC N(−) cases. The CD151−/α3β1− patients had 3.12-fold higher risk of death from BCa in comparison with the rest of the ILC N(−) patients. conclusions: Biological role of CD151/α3β1 varies between ILC and IDC. Assessment of CD151/α3β1 might help to identify ILC N(−) patients with increased risk of distant metastases
Diverse Scale Data for Shale Gas Formation Description—Why Is Digital Shale Rock Model Construction Difficult? The Polish Silurian and Ordovician Rocks Case Study
The aim of the study was to show that the petrophysical parameters, characterizing the shale gas formation, obtained from the various scale well logging and laboratory methods, correlated among themselves. Relationships determined on the basis of mesoscale (logs) and microscale outcomes (laboratory experiments on plugs or crumbs) were also recognizable in nanoscale in the computed tomography results. Selected logs (spectral gamma ray, resistivity, density, neutron, geochemical and acoustic logs) and laboratory methods turned out to be effective in rock typing and description of petrophysical parameters. Nanoscale results processing and interpretation was supported by the sophisticated special software poROSE (version 3.18, AGH University of Science and Technology, Kraków, Poland) to determine special parameters, which correlated with the standard laboratory outcomes. Results of the mercury injection porosimetry, together with adsorption/desorption of nitrogen at 77 K and pressure decay permeability, were used as the basal parameters for building a digital model of shale rock and a detailed description of the Silurian and Ordovician shale formation, treated as the hydrocarbon prospective unconventional reservoirs. Including the computed X-ray tomography results in the correlation analyses, gave the platform to extend the standard 2D approach in building the rock model to novel, 3D and more detailed presentations of rock characteristics
Wyznaczenie norm dla testu Kinga-Devicka u dzieci w wieku od 7 do 15 lat
Test Kinga-Devicka (K-D) stanowi przesiewowe narzędzie do subiektywnej oceny sakadowych ruchów oczu występujących podczas czytania. Celem niniejszych badań było rozpoczęcie procesu standaryzacji tego testu w Polsce u dzieci w wieku od 7 do 15 lat. Przebadano łącznie 358 uczniów szkoły podstawowej oraz gimnazjum z miasta Kłobuck (woj. śląskie) i jego okolic. Otrzymane czasy odczytywania kart testu K-D zostały zestawione z czasami osiąganymi przez duńskie i amerykańskie dzieci. Ponadto w badanej grupie dzieci i nastolatków dokonano analizy porównawczej pomiędzy wynikami dla kolejnych grup wiekowych oraz pomiędzy wynikami osiąganymi przez chłopców i dziewczęta z każdej grupy wiekowej. Wykazano, że pomiędzy dziećmi polskimi i amerykańskimi nie występują znaczne różnice w wynikach testu K-D. Najbardziej dynamiczne zmiany w wynikach testu K-D u dzieci polskich były zauważalne w okresie od 9. do 11. roku życia. W grupach wiekowych 12- oraz 13-latków nie odnotowano znaczących różnic dla wyników testu K-D. Również zbliżone wyniki osiągała grupa 14- i 15-latków. Nie odnotowano istotnych różnic w wynikach testu K-D dla dziewcząt i chłopców. Uzyskane lokalne normy dla K-D należałoby rozszerzyć w kolejnych badaniach w celu stworzenia ogólnopolskiej normy dla testu Kinga-Devicka.King-Devick (K-D) test is a screening tool for indirect evaluation of saccadic eye movements that occur during reading. The aim of the present paper was to start research that will, resultingly, create the standardized norms for the King-Devick test in Poland for children aged 7 to 15 years. Using the K-D test, 358 students from primary and secondary school from Kłobuck (Silesian) and their surroundings were examined. The obtained results were compared with the results received in the USA and Denmark. Moreover, the comparison analysis was made for two groups: 1. subsequent age groups, and 2. age-matched boys and girls. Based on the comparison between the obtained results and those from Danish and American population, it can be observed that are no significant differences in the K-D test results between the Polish and the US children. The most dynamic changes between age groups were observed in the age range 9–11 yr. 12- and 13 year-olds achieved close results, similar situation took place for 14- and 15-year-olds. There are no reported significant differences in K-D test results between boys and girls. The obtained local standards for K-D should be extended in further studies to create nation-wide standards for the King-Devick test