Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "Stopyra, A." wg kryterium: Autor


Wyświetlanie 1-6 z 6
Tytuł:
Acid-base indicators in the venous and arterial blood of horses affected by recurrent airway obstruction (RAO)
Autorzy:
Stopyra, A.
Sobiech, P.
Waclawska-Matyjasik, A.
Powiązania:
https://bibliotekanauki.pl/articles/30364.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
acid base balance
venous blood
arterial blood
horse
recurrent airway obstruction
lung
gas exchange
tissue oxygen level
Opis:
The acid-base equilibrium is closely linked to gas exchange in the lungs, and respiratory exchange ratios are used to evaluate respiratory effectiveness and tissue oxygen levels. Acid-base indicators are determined in both arterial and venous blood samples. This study compares the usefulness of acid-base indicators of venous and arterial blood in monitoring the condition of horses with recurrent airway obstruction. Prior to treatment involving bronchodilating glucocorticoids, expectorant and mucolytic drugs, more pronounced changes were observed in venous blood (pH 7.283, pCO2 61.92 mmHg, pO2 35.541 mmHg, HCO3 - 31.933 mmHg, BE 2.933 mmol/l, O2SAT 58.366%, ctCO2 38.333 mmol/l) than in arterial blood (pH 7.309, pCO2 53.478 mmHg, pO2 90.856 mmHg, HCO3 - 28.50 mmHg, BE 3.133 mmol/l, O2SAT 93.375%, ctCO2 31.652 mmol/l), indicating compensated respiratory acidosis. The improvement of respiratory efficiency minimized acidosis symptoms in both venous blood (pH 7.365, pCO2 43.55 mmHg, pO2 47.80 mmHg, HCO3 - 30.325 mmHg, BE 3.050 mmol/l, O2SAT 80.10%, ctCO2 29.80 mmol/l) and arterial blood (pH 7.375, pCO2 39.268 mmHg, pO2 98.476 mmHg, HCO3 - 26.651 mmHg, BE 4.956 mmol/l, O2SAT 98.475%, ctCO2 28.131 mmol/l). Venous blood parameters were marked by greater deviations from mean values, both before and after treatment. Acid-base indicators determined in venous blood are indicative of respiratory disturbances, but they do not support a comprehensive evaluation of gas exchange in the lungs.
Źródło:
Polish Journal of Veterinary Sciences; 2012, 15, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected electrolytic, haematological and enzymatic parameters in horses during endurance races
Autorzy:
Stopyra, A.
Żarczyńska, K.
Snarska, A.
Sobiech, P.
Powiązania:
https://bibliotekanauki.pl/articles/961377.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
Long-distance endurance races are a big challenge for a horse’s body. The prolonged exercise and dehydration associated with it, in adverse circumstances, may dysregulate many metabolic processes. The aim of this study was to assess changes in electrolyte balance in horses during endurance races, and to explain the potential need for electrolyte supplementation. The experiment was performed on fifty-six horses aged 9-15 years. Haematological and biochemical parameters of horse blood were tested before, during and after the completion of a 120 km endurance race. Electrolyte status (Na+, K+, Cl-) was assessed by analysing test results in horses that completed the race without any clinical symptoms of metabolic disorders and received no additional mineral supplements before the race. The following haematological parameters were determined: red blood cell and white blood cell counts, haemoglobin levels, haematocrit and red blood cell indices (MCV, MCH, MCHC). Enzymatic tests involved the serum levels of lactate dehydrogenase and creatine kinase. A significant increase was found in the levels of haemoglobin, lactate dehydrogenase and creatine kinase activity, but the values of these parameters were within the normal physiological ranges. Other parameters (WBC, RBC, Ht, MCV, MCH, MCHC, Na+, K+, Cl-) changed slightly, but were also within the ranges characteristic of sporthorses. The results suggest that horses well prepared for effort do not require additional supplementation of minerals during endurance races under conditions of the Polish climate.
Źródło:
Journal of Elementology; 2016, 21, 4
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in the blood coagulation profile after ovariohysterectomy in female dogs
Autorzy:
Sobiech, P.
Targonski, R.
Stopyra, A.
Zarczynska, K.
Powiązania:
https://bibliotekanauki.pl/articles/32156.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
blood change
blood sample
blood coagulation
ovariohysterectomy
female
dog
fibrinogen concentration
D-dimer
antithrombin III
activated partial thromboplastin time
Opis:
This study investigated changes in the coagulation profile of 10 healthy female dogs subjected to ovariohysterectomy. Blood samples were collected three times – before, directly after and 24 h after surgery. Plasma samples were analyzed to determine thrombin time (TT), prothrombin time (PT), activated partial thromboplastin time (APTT), fibrinogen content, D-dimer content and antithrombin (AT) III activity. The results revealed post-operative haemostatic system disorders related to prolonged APTT, higher fibrinogen and D-dimer concentrations and lower levels of AT III activity.
Źródło:
Polish Journal of Veterinary Sciences; 2011, 14, 2
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of micronutrient deficiencies on the health status of transition cows
Autorzy:
Żarczyńska, K.
Żarczyński, P.
Sobiech, P.
Snarska, A.
Stopyra, A.
Wieteska, M.
Płaczek, A.
Powiązania:
https://bibliotekanauki.pl/articles/962683.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
Minerals, in particular micronutrients such as copper, manganese, zinc, selenium and chromium, deliver health benefits for high-yielding dairy cows. The availability of nutrients is particularly important during the transition period (between 3 weeks prepartum to 3-4 weeks postpartum), which is a highly vulnerable time in the production cycle that determines the health status of lactating cows, their milk yield and reproductive performance. In cows, prolonged mineral deficiency can produce subclinical symptoms of nutrient deficiency and, if untreated, can lead to a clinical presentation of the disorder. Less severe deficiencies, in particular micronutrient deficiencies, are more difficult to identify because they induce only minor functional and structural changes in the body, but together with energy metabolism disorders, they can lead to oxidative stress and immunosuppression, in particular in the transition period. Micronutrient supplements reduce the harmful effects of free radicals because the majority of micronutrients form the active centers of antioxidant enzymes. Dietary supplementation promotes reproductive performance, healthy fetal development and immunity. Micronutrients alleviate bacterial infections associated with mastitis, lower somatic cell counts in milk and minimize the risk of metabolic diseases caused by a negative energy balance. This study discusses the role of the major micronutrients in cattle nutrition and their effect on the health status of transition cows.
Źródło:
Journal of Elementology; 2017, 22, 4
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in blood acid-base balance parameters and coagulation profile during diarrhea in calves
Autorzy:
Sobiech, P.
Rekawek, W.
Ali, M.
Targonski, R.
Zarczynska, K.
Snarska, A.
Stopyra, A.
Powiązania:
https://bibliotekanauki.pl/articles/31605.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The purpose of this study was to investigate possible alterations in acid-base balance parameters and the coagulation profile in neonatal diarrheic calves. Twenty neonatal diarrheic and 20 clinically healthy neonatal calves aged between 1 week to 10 days were used. All blood samples were taken on the third day from the onset of diarrhea symptom. Venous blood samples were collected from each animal to determine platelet numbers, pH, pCO₂, pO₂, HCO₃⁻, BE, O₂SAT, ctCO₂ and electrolytes (K⁺, Na⁺ and Cl⁻). Plasma samples were collected from each animal for the measurement of prothrombin time (PT), activated partial thromboplastin time (APTT), thrombin time (TT), the concentrations of fibrinogen, D-dimer and the activity of antithrombin III (AT III). Blood pH (7.19), BE (-10.6 mmol/l), HCO₃⁻ (25.15 mmol/l), pO₂ (3.33 kPa), O₂SAT (24.12 %) were significantly lower and serum concentration of K⁺ (6.55 mmol/l) was significantly higher in diarrheic calves. These changes indicate the state of uncompensated metabolic acidosis with accompanying hyperkalemia. TT (32.05s) and APTT (39.9s) values were more prolonged in calves with diarrhea than in the control group. D-dimer (587.25 μg/l) concentrations were significantly increased while a visible drop in AT III (103.75%) activity and platelets counts (598 x10⁹/l) were observed in diarrheic group of calves. The results suggest that a consumptive type of disseminated intravascular coagulation (DIC) developed in diarrheic calves.
Źródło:
Polish Journal of Veterinary Sciences; 2013, 16, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of sand-casting parameters on microstructure and properties of magnesium alloys
Wpływ parametrów odlewania grawitacyjnego na mikrostrukturę i właściwości stopów magnezu
Autorzy:
Kiełbus, A.
Stopyra, M.
Jarosz, R.
Powiązania:
https://bibliotekanauki.pl/articles/351914.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Mg alloys
sand casting
modification
Elektron 21 magnesium alloy
WE43 magnesium alloy
properties
fluidity
stopy Mg
odlewy piaskowe
modyfikacja
Elektron 21
WE43
właściwości
płynność
Opis:
The paper present the influence of modifying process on chemical composition, microstructure, and selected properties of Mg alloys. Two sand-casting creep-resistant alloys, Elektron 21 and WE43, were analyzed in various forms: without modifiers, with the amount of modifier suggested by the producer, and with this amount increased by 50% and 100%. The volume fraction of eutectic areas, tensile strength, and yield strength were measured and the fluidity and linear contraction were analyzed. The research shows that, in contrast to what is widely assumed to be a positive influence of rare-earth elements on Mg alloys properties, a large increase in the amount of modifiers does not always lead to an improvement in the alloy properties. However, the results are tentative because they may have been influenced by the melting technology used, which can be improved. Rare-earth elements tend to react with fluxes, which could lead to a decrease in mechanical properties and fluidity. More research is planned wherein the alloys are melted under a protective atmosphere.
W artykule zaprezentowano wpływ modyfikacji odlewniczych stopów magnezu na skład chemiczny, mikrostrukturę i wybrane właściwości. Badano 2 stopy odlewane do form piaskowych, przeznaczone do pracy w podwyższonej temperaturze: Elektron 21 i WE43 w czterech wariantach: bez modyfikacji, z ilością modyfikatorów dodaną zgodnie z procedura zalecana przez producenta, powiększona o 50 i 100%. Wykonano ilościową analizę udziału objętościowego eutektyk, zmierzono wytrzymałość na rozciąganie, granice plastyczności, wykonano próbę lejności oraz skurczu liniowego. Wykazano, że mimo powszechnie uznanego za pozytywny wpływu metali ziem rzadkich na właściwosci stopów Mg dodawanie zwiększonych ilości modyfikatorów w stosunku do zaleceń producentów nie zawsze ma dobry wpływ na wyniki. Prawdopodobnie duży wpływ na wyniki badań miała technologia odlewania, wymagająca poprawy - zastosowane topniki mogą reagowac z pierwiastkami stopowymi i powodować obniżenie właściwości mechanicznych i lejności. W przyszłości planowane są podobne badania dla stopów topionych w atmosferze gazowej.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 2; 635-640
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies