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    Tytuł:
    Proba pomiaru sredniej biomasy osobniczej [SBO] epigeicznych biegaczowatych w ogniskach gradacyjnych osnui gwiazdzistej [Acantholyda nemoralis Thoms.]
    Autorzy:
    Guzik, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/825071.pdf
    Data publikacji:
    2000
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    fauna
    ogniska gradacyjne
    entomologia lesna
    lesnictwo
    fauna epigeiczna
    bioindykacja
    Slask
    liczebnosc
    drzewostany sosnowe
    owady
    struktura dominacji
    biegaczowate
    Carabidae
    srednia biomasa osobnicza
    Źródło:
    Sylwan; 2000, 144, 03; 79-85
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wplyw zyznosci siedlisk i wieku drzewostanow na gradacje osnui czerwonoglowej [Acantholyda erythrocephala L.] na Slasku
    Autorzy:
    Guzik, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/820349.pdf
    Data publikacji:
    1999
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    osnuja czerwonoglowa
    zyznosc siedliska
    siedliska lesne
    drzewostany sosnowe
    owady
    szkodniki roslin
    wiek drzewostanu
    lesnictwo
    Acantholyda erythrocephala
    gradacja
    Źródło:
    Sylwan; 1999, 143, 06; 61-71
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oszacowanie metodami EPR, TL i PPSL odpowiedzi próbek przy wykrywaniu potencjalnego napromieniowania żywności
    Evaluation of detection of potential radiation treatment of foodstuff samples using EPR, TL and PPSL methods
    Autorzy:
    Guzik, G. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/214127.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    porównania międzylaboratoryjne
    EPR
    TL
    PSL
    intercomparative studies
    Opis:
    VI międzynarodowe porównanie wiarygodności trzech najważniejszych metod analitycznych stosowanych do wykrywania napromieniowanej żywności zorganizowano w 2015 r. pod auspicjami Ministerstwa Zdrowia i Hiszpańskiej Agencji Bezpieczeństwa Żywności i Żywienia (AESAN) oraz Krajowego Centrum Żywności (CNA). W badaniu zatytułowanym „Międzynarodowe badanie porównawcze metodami Tl, PSL i EPR, 6 runda” brało udział dziewiętnaście specjalistycznych laboratoriów z kilku krajów europejskich. CNA jest doświadczonym laboratorium, posiadającym akredytację do wykrywania napromieniowanej żywności metodami thermoluminescencji (TL), fotostymulowanej luminescencji (PSL) i spektroskopii elektronowego rezonansu paramagnetycznego (EPR). Większość laboratoriów uczestniczących w porównaniu międzylaboratoryjnym posiada również taką akredytację. Asortyment produktów spożywczych dostępnych na rynku jest coraz szerszy, jednak nie wszystkie z nich są testowane pod kątem ich potencjalnego napromieniowania. Jest to istotny argument przemawiający za udziałem wszystkich laboratoriów w porównaniach międzylaboratoryjnych, takich jak obecnie przeprowadzane.
    Under the auspices of the Ministry of Health and the Spanish Agency for Food Safety and Nutrition (AESAN) the National Food Centre (CNA) in 2015 has organised the 6th international exercise for testing the reliability of three most important analytical methods used for the detection of irradiated food. The study named ”Intercomparative exercise for quality assurance on Tl, PSL and EPR Irradiated food detection methods, 6 th Round” assembled nineteen specialized laboratories from several European countries. The organizing institution CNA possess accreditation for the detection of irradiated food and is experienced in thermoluminescence (TL), photostimulated luminescence (PSL) and electron paramagnetic resonance spectroscopy (EPR). It is also the case with most of participating laboratories. Presently the spectrum of food products found in the market is significantly extended and many of this products were not tested or validated whether their radiation treatment is detectable. This is a strong argument for the need of the organization of intercomparative studies as the present one.
    Źródło:
    Postępy Techniki Jądrowej; 2015, 4; 13-16
    0551-6846
    Pojawia się w:
    Postępy Techniki Jądrowej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reliability of light-stimulated photoluminescence (PSL) in detection of irradiated food comparison with thermoluminescence method (TL)
    Autorzy:
    Guzik, G. P.
    Stachowicz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/147688.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    irradiation
    detection
    food products
    spices
    herbs
    blends
    photostimulated luminescence (PPSL)
    thermoluminescence (TL)
    Opis:
    The detection of irradiation of several classes of food products with the use of thermoluminescence (TL) and photostimulated luminescence (PPSL) has been proceeded. The comparison of the results obtained by both methods has been done and reliability of the PPSL method as compared with the TL method evaluated. Conclusion concerning the usefulness of such evaluation to the practice has been drawn.
    Źródło:
    Nukleonika; 2008, 53, suppl. 1; 25-29
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on radiation-induced radicals giving rise to stable EPR signal suitable for the detection of irradiation in L-sorbose-containing fruits
    Autorzy:
    Guzik, G. P.
    Stachowicz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/146498.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    sorbose
    crystallite
    electron paramagnetic resonance (EPR)
    EPR
    irradiation
    Opis:
    The stable and complex EPR signals produced by the action of ionizing radiation on crystalline L-sorbose (C6H12O6) separated from rowan berries (Sorbus aucuparia) were studied. Isothermal heating of the samples at the temperature close to the melting point of L-sorbose (140°C) results in the modification and simplification of the EPR signal involved. In the EPR signal of heated L-sorbose, the isotropic quartet was distinguished. In the differential spectrum obtained by subtraction of normalized spectra of unheated and heated L-sorbose, the isotropic doublet was identified in addition. The DFT fitting offers the probable assignment of the EPR signals to specifi c radical structures.
    Źródło:
    Nukleonika; 2016, 61, 4; 461-465
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on organic radicals giving rise to multicomponent EMR spectra in dried fruits expose to ionizing radiation II. D-Glucose
    Autorzy:
    Guzik, G. P.
    Stachowicz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/147173.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    dried fruits
    electron magnetic resonance (EMR)
    irradiation
    glucose
    organic radicals
    Opis:
    Crystalline D-glucose extracted from dried resins was irradiated with 60Co gamma rays. The multicomponent EMR spectra of the samples kept at ambient temperature were compared with those heated at 105°C – the temperature close to the melting point of glucose. Normalized EMR spectra recorded with both samples were subtracted, resulting in a differential EMR spectrum. Spectral analysis of all three spectra has been done resulting in the identification of isotropic doublet of doublets assigned to less stable radical derived from parent glucose molecule.
    Źródło:
    Nukleonika; 2013, 58, 3; 425-428
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    EPR study on sugar radicals utilized for detection of radiation treatment of food
    Autorzy:
    Guzik, G. P.
    Stachowicz, W.
    Michalik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/146706.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    density functional theory (DFT)
    dried fruits
    electron paramagnetic resonance (EPR)
    irradiation
    mannose
    sorbose
    Opis:
    Radicals produced by ionizing radiation in sugars, the components of dried and raw fruits give rise to stable multicomponent electron paramagnetic resonance (EPR) signals unidentified so far. The subject of the present EPR study is to identify the radicals stabilized in gamma-irradiated crystalline sugars, D(+)mannose and L(-)sorbose extracted from cranberries (Vaccininum oxycoccos) and rowan berries (Sorbus aucuparia), respectively. EPR measurements and density functional theory (DFT) simulations were employed for that purpose.
    Źródło:
    Nukleonika; 2012, 57, 4; 545-549
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on stable radicals produced by ionizing radiation in dried fruits and related sugars by electron paramagnetic resonance spectrometry and photostimulated luminescence method – I. D-fructose
    Autorzy:
    Guzik, G. P.
    Stachowicz, W.
    Michalik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/147212.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    fructose
    PPSL
    EPR
    irradiation
    detection
    food products
    Opis:
    Stability of sugar born radicals separated from irradiated Iranian dried raisins and from D-fructose by Sigma Aldrich has been studied at room temperature by EPR and PPSL methods in a period of 360 days. It has been proven for the first time experimentally that the complex EPR spectrum of irradiated sugars is changed in time and after heating. Hence, this made it possible to distinguish spectral lines of two specific radicals contributing to the formation of multicomponent spectra, recorded in both time dependent and heating experiments. The radicals measured by EPR and energy traps detected by PPSL decay at room temperature in a similar way, suggesting a similar distribution of both species in sugar crystallites. We think that our experimental approach might be useful to study interrelation between the formation and trapping of radicals and energy accumulated in crystalline matrices. In order to achieve the isolation of individual sugars from fruits the extraction and specific separation procedures have been adapted with the use of methanol, ethanol and water solvents. Our results clearly show that radicals induced by radiation in fruits (with fructose born radicals as major constituent) are stable enough at room temperature for easy identification of irradiated raisins using the EPR method.
    Źródło:
    Nukleonika; 2008, 53, suppl. 2; 89-94
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of irradiated dried fruits using EPR spectroscopy
    Autorzy:
    Guzik, G. P.
    Stachowicz, W.
    Michalik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/148844.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    dried fruits
    electron paramagnetic resonance (EPR)
    fructose
    glucose
    irradiation
    Opis:
    The dominating carbohydrates in fruits are monosaccharides like fructose, glucose, sorbose and mannose. In dehydrated fruits, concentration of monosaccharides is higher than in fresh fruits resulting in the formation of sugar crystallites. In most of dried fruits, crystalline fructose, and glucose dominate and appear in proportion near to 1:1. Irradiation of dried fruits stimulates radiation chemical processes resulting in the formation of new chemical products and free radicals giving rise to multicomponent EPR signal which can be detected for a long period of time. For that reason, it is used as a marker for the detection of radiation treatment of dried fruits. It has been found that EPR spectra recorded in dried banana, pineapple, papaya, and fig samples resemble the EPR spectrum obtained by computer addition of fructose and glucose spectra taken in proportion 1:1. The decay of radiation induced EPR signals proceeds in dried fruits fast during the first month of observation and becomes much slower and almost negligible after prolonged storage. However, it remains intense enough for EPR detection even one year after processing. The radiation induced EPR signal is easily detected in dried fruits exposed to 0.5 kGy of gamma rays. Thus, the EPR method of the detection of irradiated fruits can be used for the control of dried fruits undergoing quarantine treatment with 200–300 Gy of ionizing radiation.
    Źródło:
    Nukleonika; 2015, 60, No. 3, part 2; 627-631
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of radiation treatment of dry plant extracts by thermoluminescence and pulsed photostimulated luminescence. Comparative study
    Autorzy:
    Lehner, K.
    Malec-Czechowska, K.
    Stachowicz, W.
    Guzik, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/148034.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    plant extract
    detection
    irradiation
    thermoluminescence
    photostimulated luminescence
    Opis:
    Results of the examination of the variety of dry plant extracts (Thyme extract, Celery seed extract, Artichoke extract, Citrus aurantium extract and others) by two different detection methods are described. Both PSL and TL methods are presented and discussed. Comparative study based on the analysis of the results obtained by thermoluminescence (TL) and photostimulated luminescence (PSL) measurements delivered the arguments that preselection of detection methods based on model studies is rational to be adapted in analytical laboratories specialized in the detection of irradiated foods.
    Źródło:
    Nukleonika; 2009, 54, 2; 99-105
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mathematical model of piston ring sealing in combustion engine
    Autorzy:
    Koszałka, G.
    Guzik, M
    Powiązania:
    https://bibliotekanauki.pl/articles/258834.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    exhaust gas blow-by
    displacements of rings
    twisting of rings
    oil film
    cylinder
    piston
    ring
    mathematical model
    lubrication
    Opis:
    This paper presents a mathematical model of piston-rings-cylinder sealing (TPC) of a combustion engine. The developed model is an itegrated model of gas flow through gaps in TPC unit , displacements and twisting motions of piston rings in ring grooves as well as generation of oil film between ring face surfaces and cylinder liner. Thermal deformations and wear of TPC unit elements as well as heat exchange between flowing gas and surrounding walls , were taken into account in the model. The paper contains descriptions of: assumptions used for developing the model , the model itself, its numerical solution as well as its computer application for carrying out simulation tests.
    Źródło:
    Polish Maritime Research; 2014, 4; 66-78
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of friction force determination method on results obtained from model of gas flow from combustion chamber to the crankcase
    Autorzy:
    Koszałka, G.
    Niewczas, A.
    Guzik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/245664.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engine
    blowby
    piston ring
    friction force
    mathematical model
    Opis:
    The paper presents investigation of the influence of the friction force calculation method on the results of simulations run with the use of the model ofgas flow from the combustion chamber to the crankcase and piston rings motion in the grooves. The first series of simulations was run using the gas flow and ring motion model in which the friction force was calculated from the empirical equation. The second series was run with the use of the gas flow and ring motion model fully integrated with the ring lubrication model. In that case the friction force was derived from the hydrodynamic model of ring lubrication. Comparison of the results obtained in the first and second series of simulations indicated that despite the fact that the friction forces calculated with these two methods differed considerably, the method of friction force calculation had insignificant effect. This refers to the ąuantities determined in the simulations which are most important from practical point of view - i.e. displacements of the rings in the grooves, pressure courses in inter-ring regions and blowby rate. It is not necessary to integrate the gas flow and ring motion model with the model of ring lubrication, and doing so to complicate it very much, if the aim of the calculations is simulation of blowby and rings behaviour in the grooves.
    Źródło:
    Journal of KONES; 2009, 16, 4; 223-239
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A numerical model for calculation of piston rings wetted area in a combustion engine
    Autorzy:
    Guzik, M.
    Koszałka, G.
    Niewczas, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/246518.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engine
    ring pack
    lubrication
    simulation
    wear
    mechanical losses
    Opis:
    Assumptions made while modelling the oil film between the ring and the cylinder liner in IC engines, especially concerning the boundaries of the wetted area of the ring face surface, were discussed and the assumptions adopted for the developed model were presented in this study. It was assumed that the model should take into account partially flooded lubrication, which meant that the boundaries of the ring wetted area had to be determined. Based on the adopted assumptions, a model for calculation of the oil film thickness between the cylinder and moving rings, and thickness of the oil film left on the cylinder by the ring pack was developed. A computer application operating in the Windows operation system was developed to carry out numerical calculations. The results of initial numerical calculations were also presented. The proposed model can be utilized to determine the effects of the ring pack geometry, especially the geometry of the ring surface, on parameters of lubrication. These parameters, including the oil film thickness, distribution of pressure in oil film or tangential force, are crucial for friction and wear of cooperating surfaces, oil consumption, and flow of gas from the combustion chamber to the crankcase, thus playing a role in the durability, fuel consumption and emission of an engine.
    Źródło:
    Journal of KONES; 2012, 19, 3; 156-164
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The content of heavy metals in shells of Mytilus sp. from the Adriatic, Baltic and Black seas
    Autorzy:
    Gal, A.
    Guzik, M.
    Kuczkowska-Kuzniar, A.
    Formicki, G.
    Stawarz, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/84122.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
    Tematy:
    heavy metal content
    shell
    Mytilus
    salt water mussel
    marine bivalve mollusc
    animal species
    Adriatic Sea
    Baltic Sea
    Black Sea
    statistical analysis
    Źródło:
    Folia Malacologica; 2012, 20, 1
    1506-7629
    Pojawia się w:
    Folia Malacologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the impact of exercise of gait on a treadmill on balance of people who suffered from cerebral stroke
    Autorzy:
    Drużbicki, M.
    Przysada, G.
    Guzik, A.
    Kwolek, A.
    Brzozowska-Magoń, A.
    Sobolewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/307497.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    równowaga
    biofeedback
    biologiczne sprzężenie zwrotne
    udar mózgu
    balance
    treadmill
    cerebral stroke
    Opis:
    Purpose: The aim of the study is to define the impact of exercise on a treadmill on static balance and stability of posture in a group of patients after cerebral stroke rehabilitated in a late period, with an application of a treadmill with the function of visual biofeedback. Methods: The examination was carried out in a group of 46 people in a late period after ischemic cerebral stroke. The patients examined were randomly put to a group with intervention (n = 23), in which a rehabilitation programme with an application of a treadmill with the visual feedback function was realized and to a control group (n = 23). They evaluated balance in standing on both feet by means of a force plate, symmetry of load of lower limbs and dynamic balance in Up & Go test. Results: A statistically significant change of stabilometric parameters was observed only in the area of postural sways of the centre of pressure (COP). A significant improvement of the symmetry of load of lower limbs in standing ( p = 0.0266) was diagnosed in the examined group after the end of the programme. After the end of the programme no significant difference between the group with intervention and the control group as for a change of balance of the examined patients was found. Conclusions: In the examined group in the chronic period after cs no significant improvement of stabilometrically evaluated balance was obtained, but improvement of the symmetry of load of lower limbs as well as improvement of dynamic balance were observed.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2016, 18, 4; 41-48
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Critical Behaviour of the Mean-Field Ferromagnet $Cu_{1.02}[Cr_{1.77}Ti_{0.24}]Se_4$
    Autorzy:
    Krok-Kowalski, J.
    Władarz, G.
    Rduch, P.
    Malicka, E.
    Groń, T.
    Guzik, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1409626.pdf
    Data publikacji:
    2012-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.40.Cx
    75.50.Dd
    64.60.Ht
    Opis:
    Magnetization, M, and susceptibility, χ, measurements showed both strong lowering of magnetic moment in comparison with $CuCr_2Se_4$ matrix and zero-field-cooling-field-cooling susceptibility splitting characteristic for the spin-glass behaviour. Isothermal magnetization curves, M(H), easy saturate and large values both of the Curie $T_{C}$=253 K and Curie-Weiss θ=283.5 K temperatures indicate the ferromagnetic order which coexists with the spin-glass state. The critical behaviour investigated around the paramagnetic-ferromagnetic phase transition revealed that the values of critical exponents are close to those predicted by the mean field model for long-range magnetic interactions.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 6; 1102-1104
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of humic acid on metal accumulation by Unio tumidus
    Autorzy:
    Formicki, G.
    Stawarz, R.
    Guzik, M.
    Gal, A.
    Kuczkowska-Kuzniar, A.
    Ciaglo, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/83764.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
    Tematy:
    humic acid
    metal accumulation
    cadmium accumulation
    copper accumulation
    Unio tumidus
    bivalve
    Źródło:
    Folia Malacologica; 2012, 20, 1
    1506-7629
    Pojawia się w:
    Folia Malacologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relationships between walking velocity and distance and the symmetry of temporospatial parameters in chronic post-stroke subjects
    Autorzy:
    Guzik, A.
    Drużbicki, M.
    Przysada, G.
    Kwolek, A.
    Brzozowska-Magoń, A.
    Sobolewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/306249.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    udar
    symetria
    analiza lokomocji
    prędkość
    stroke
    symmetry
    gait analysis
    velocity
    Opis:
    Purpose: Subjects with post-stroke hemiparesis frequently present with asymmetric gait patterns. Symmetry, reflecting similarities in temporospatial, kinematic parameters, is an important measure of gait assessment. The study was designed to examine the relationships between asymmetry of temporal, spatial and kinematic gait parameters and walking velocity and distance. Methods: Temporospatial and kinematic gait parameters were examined in a group of 50 chronic post-stroke subjects and in a group of 25 healthy controls. Symmetry ratio was calculated for all the parameters. Gait velocity was measured during 10-metre test, the walking distance during 2-Minute Walk Test, and balance during Up&Go Test. Results: The relationship between stance phase duration symmetry and gait speed was at a moderate level (r = –0.43, p = 0.0173). There was a moderate relationship between swing phase symmetry and walking velocity and distance. The findings did not show a significant correlation between step length symmetry versus gait speed and distance. Conclusions: There is a mild relationship between self-selected gait velocity and walking distance versus temporal parameters symmetry. The findings do not confirm a relationship between self-selected gait velocity and walking distance versus spatial and kinematic parameters as well as balance. Likewise, no evidence confirms that asymmetry of temporal, spatial, kinematic gait parameters changes with the age of post-stroke subjects or is related to the length of time from stroke onset. Given the above, gait symmetry may be recognized as an important indicator of the level of gait control in post-stroke patients because it enables unique gait assessment, independent from other parameters.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2017, 19, 3; 147-154
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of the Gait Variability Index for the evaluation of individuals after a stroke
    Autorzy:
    Guzik, A.
    Drużbicki, M.
    Przysada, G.
    Szczepanik, M.
    Bazarnik-Mucha, K.
    Kwolek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/307461.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    udar
    analiza chodu
    indeks zmienności chodu
    parametry czasoprzestrzenne
    stroke
    gait analysis
    Gait Variability Index
    spatiotemporal parameters
    Opis:
    The Gait Variability Index (GVI) summarizes overall gait quality, taking into account spatiotemporal parameters from a 3-dimensional gait analysis. However, there are no studies evaluating changes in gait patterns after stroke, based on the GVI. The study was designed to assess usefulness of the GVI for evaluation of gait pathology in subjects with stroke, compared to healthy individuals. Methods: Spatiotemporal gait parameters were examined in a group of 50 subjects at a chronic stage post-stroke and in 50 healthy controls. The GVI was calculated based on the 9 spatiotemporal data. Results: The findings show statistically significant differences between the values of the GVI for paretic and non-paretic limbs ( p < 0.001). Higher values of the index were identified in the case of non-paretic limb: 80.74 vs. 76.32. The GVI scores were decreased for both paretic and non-paretic limbs, compared to the controls – p < 0.001. Conclusions: The GDI score seems to be a viable tool for quantifying changes in gait pattern during evaluation of subjects with chronic post-stroke hemiparesis. Further studies should be conducted to validate the use of GVI in the post-stroke population.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2018, 20, 2; 171-177
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of incidence frequency and analysis of risk factors for the occurrence of back pain in a randomly-chosen group in the Podkarpackie Region of south-eastern Poland
    Autorzy:
    Druzbicki, M.
    Przysada, G.
    Guzik, A.
    Kwolek, A.
    Snela, S.
    Opalinska, I.
    Matlosz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/50432.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2016, 23, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of invasive Fallopia taxa on resident plant species in two river valleys (southern Poland)
    Autorzy:
    Chmura, D.
    Tokarska-Guzik, B.
    Nowak, T.
    Wozniak, G.
    Bzdega, K.
    Koszela, K.
    Gancarek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/58507.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    invasive species
    biological invasion
    Fallopia
    plant species
    river valley
    vegetation
    phenology
    Polska
    Opis:
    Riparian zones in two rivers in southern Poland were studied in terms of species composition and soil parameters in patches dominated by three knotweed taxa (Fallopia japonica, F. sachalinensis and the hybrid F. ×bohemica). The main purpose was to detect any differences in species diversity, environmental conditions and in the impact of the three Fallopia spp. on resident species. Fieldwork was conducted in spring and summer in 30 invaded plots (in total 90 subplots). It was demonstrated that vegetation dominated by particular knotweed taxa differed in response to soil pH and ammonium, nitrate, and magnesium content. Fallopia spp. (living plants and necromass) had a stronger negative impact on the cover and species diversity of the resident species in summer in comparison with spring. Vegetation patches differed significantly in species composition in relation to the knotweed taxa present. These differences may be the consequence of the differentiated biotopic requirements of Fallopia taxa and the coexisting plants, or to the different impact of the knotweed taxa on the resident species.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2015, 84, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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