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    Tytuł:
    Structure of 22Cr25NiWCoCu Austenitic Stainless Steel After Ageing
    Autorzy:
    Sroka, Marek
    Zieliński, A.
    Puszczało, T.
    Sówka, K.
    Hadzima, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2048810.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    22Cr25NiWCoCu steel
    microstructure
    precipitates
    ageing
    Opis:
    The 22Cr25NiWCoCu austenitic stainless steel was developed by AB Sandvik Material Technology in Sweden. Due to its high creep strength and good corrosion resistance, this material is well suited for use in superheaters in advanced coal-fired power boilers as well as in other types of steam boilers using various types of fuel. The examined material was subject to long-term ageing for the time of annealing up to 20 000 h at 700 and 750°C. Precipitation processes and microstructure stability as-received and after ageing were investigated. Examination of the microstructure was conducted using scanning electron microscopy. The identification of secondary phases was carried out by X-ray phase composition. Using the results of the investigations of precipitation processes in the microstructure, both within the grains and at the grain boundaries, their statistical analysis was carried out. To illustrate this impact, the following parameters were used: surface area and equivalent diameter of precipitates. Based on the surface area measurements, the percentage of the phase in the reviewed photo’s total area was calculated.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 1; 175-180
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stopping hemorrhages from the limbs: raising efficiency through training on unfixed human preparations
    Autorzy:
    Leszczyński, P.
    Klepacka, M.
    Bakalarski, P.
    Załęska-Marniche, S.
    Krusińska, K.
    Bojko, I.
    Sówka, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2088209.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Opolski. Instytut Nauk o Zdrowiu
    Tematy:
    cadavers
    bleeding
    hemorrhage
    paramedic
    learning
    education
    Opis:
    Background: Hemorrhages from the limbs are one of the most frequent injuries endangering human life. Immediate help from witnesses and the emergency services is necessary in such cases. Developing the skill of stopping the bleeding manually requires adequate training. One of the modern methods for such training is the use of cadavers, which accurately imitate real patients. Aim of the study: The aim of this research is to evaluate the effectiveness of learning to stop the bleeding manually on freshly frozen cadavers. Material and methods: Thirty-one people who had already trained on medical phantoms took part in the study. The participants stopped the hemorrhage on the cadavers twice and the time taken was recorded. The second attempt was performed after a short briefing from a teacher. After the training, the participants assessed their satisfaction with the course on a scale of 1 to 5. Results: On the first attempt, the average time of stopping the bleeding was 2.06 seconds (SD ± 1.61); the longest time was 10 seconds and the shortest was 0.7 seconds. On the second attempt, the average time was 1.52 seconds (SD ± 0.59); the longest time was 4.1 seconds and the shortest was 0.8 seconds. The average rating of course satisfaction among the respondents was 4.48 points (SD ± 0.88). Conclusions: This research showed that training on cadavers increased the quickness of reaction while stopping a hemorrhaging. Moreover, it indicated that training on medical phantoms does not assure optimal ability to perform rescue procedures.
    Źródło:
    Medical Science Pulse; 2019, 13, 4; 23-26
    2544-1558
    2544-1620
    Pojawia się w:
    Medical Science Pulse
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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