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    Wyświetlanie 1-6 z 6
    Tytuł:
    Factors influencing the efficiency of wheat anther culture
    Autorzy:
    Lantos, C.
    Pauk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2117772.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    androgenesis
    anther culture
    doubled haploid
    Triticum aestivum L.
    wheat
    Opis:
    Using in vitro androgenesis serves as a unique opportunity to produce doubled haploid (DH) plants in many species. More benefits of this biological phenomenon have kept these methods in the focus of fundamental research and crop breeding for decades. In common wheat (Triticum aestivum L.), in vitro anther culture is one of the most frequently applied DH plant production methods. The efficiency of in vitro wheat anther culture is influenced by many factors, such as the genotype, growing conditions, collection time, pre-treatments, and compositions of media and culture conditions. According to some critical review, the genotype dependency, low efficiency and albinism are mentioned as limitations of application of the anther culture method. However, some research groups have made significant efforts to diminish the effects of these bottlenecks. Due to the improvements, a well-established in vitro anther culture method can be an efficient tool in modern wheat breeding programs.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2020, 62, 2; 7-16
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Safety conditions in dynamic IT examinations of rheumatoid arthritis lesions
    Warunki BHP w badaniach zmian w reumatoidalnym zapaleniu stawów za pomocą termografii dynamicznej
    Autorzy:
    Wasilewska, A.
    Pauk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/270674.pdf
    Data publikacji:
    2017
    Wydawca:
    Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
    Tematy:
    termografia w podczerwieni
    chłodzenie
    woda z lodem
    infrared thermography
    cooling
    ice water
    Opis:
    Purpose of the article: Human skin temperature distribution is a source of clinically relevant information about tissue pathological process and can be observed with the use of non-contact ad non-invasive measuring technique named infrared thermography (IT). The aim of the study is to establish dynamic IT measurement safety conditions in RA examination in order to prepare the refined study protocol which provides for extracting the most reliable diagnostic thermal data. Experimental part: Thirty participants (20% of males) with diagnosed RA were included in this study. The protocol consisted in registration of thermal recovery processes after immersing left and right foot separately in ice water of less than 0 Celsius degrees. Cooling procedure included immersing left and right foot separately in ice water for 5 seconds. Separate recordings of left and right foot temperature changes were performed for 3 minute periods. The following joint temperatures were measured: ankle joint and 5 metatarsophalangeal joints. Conclusions: Difference between the moment right after immersion and the moment after 3-minute recovery appeared to be the lowest in two different patients’ ankle joints. These results suggest that the slowest rewarming rate occurs in the area of ankle joint.
    Cel artykułu: Rozkład temperatury skóry ludzkiej stanowi źródło istotnej klinicznie informacji o patologicznym procesie toczącym się w tkance i można go obserwować za pomocą bezkontaktowej oraz nieinwazyjnej techniki pomiarowej zwanej termografią w podczerwieni (IT). Celem artykułu jest ustanowienie warunków bezpieczeństwa pomiaru za pomocą termografii dynamicznej w badaniach reumatoidalnego zapalenia stawów w celu przygotowania udoskonalonego protokołu badawczego, który zapewnia wydobycie najbardziej istotnych diagnostycznych danych termicznych. Część eksperymentalna: Trzydziestu uczestników (20% mężczyzn) ze zdiagnozowanym RZS zostało włączonych do badania. Protokół uwzględniał rejestrację termicznego powrotu do stanu wyjściowego po zanurzeniu oddzielnie lewej i prawej stopy w wodzie z lodem o temperaturze mniejszej niż 0°C. Procedura chłodzenia polegała na oddzielnym zanurzeniu lewej i prawej stopy w wodzie z lodem na 5 sekund. Wykonano oddzielne 3-minutowe nagrania zmian temperatur lewej i prawej stopy. Zmierzono temperatury następujących stawów: stawu skokowo-goleniowego oraz stawów śródstopnopaliczkowych. Wnioski: Różnica pomiędzy momentem bezpośrednio po zanurzeniu a momentem po 3-minutowej rejestracji okazała się być najniższa w stawach skokowo-goleniowych u dwóch pacjentów. Te wyniki sugerują, że najwolniejsze tempo ponownego nagrzewania występuje w obszarze stawu skokowego.
    Źródło:
    Aparatura Badawcza i Dydaktyczna; 2017, 22, 3; 205-214
    2392-1765
    Pojawia się w:
    Aparatura Badawcza i Dydaktyczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Image processing techniques for roi identification in rheumatoid arthritis patients from thermal images
    Autorzy:
    Wasilewska, A.
    Pauk, J.
    Ihnatouski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/386454.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    dynamic thermography
    image processing
    segmentation
    inflammation
    Opis:
    Rheumatoid arthritis (RA) is a systemic autoimmune disease that manifests itself by joint inflammation, swelling, pain, tenderness and may involve extra-articular organs in severe cases. Joint inflammatory lesions are associated with higher temperature due to increased vascularity in the area of inflamed tissues. This papers aimed to identify heat patterns from ROIs to interpret the presence of inflammation in rheumatoid arthritis patients. The thermovisual image sequences were collected from 65 patients with Rheumatoid Arthritis (RA). Infrared images were generated by a thermal scanning camera (FLIR E60bx Systems Inc., USA). Separate recordings of left and right foot temperature changes were performed for 3 minute periods. The temperature measurement was performed at the moment right after cold water immersion (post-cooling temperature) and at the moment after thermal recovery (post-recovery temperature). The recording of 3-minute foot thermal recovery was used for analysis. Automatically identified ROI corresponds to the area of the soft tissues covering cuboid and navicular bone.
    Źródło:
    Acta Mechanica et Automatica; 2018, 12, 1; 49-53
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of mutual aerobic and lower limb muscular activity during cycling
    Autorzy:
    Griskevicius, J.
    Daunoraviciene, K.
    Pauk, J.
    Troskovas, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/951811.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    IEMG
    aerobik
    aktywność fizyczna
    mięśnie
    iEMG
    aerobic capability
    physical activity
    veloergometry
    muscular effort
    lower limbs
    muscular fatigue
    Opis:
    The evaluation of physical activity is a complex task that requires performing an analysis of muscular activity and aerobic/anaerobic threshold and it is often difficult to observe and propose a single method. The purpose of the article is to evaluate a relation between aerobic capacity and activity of lower limb muscles via changes of muscle’s EMG signal during physical, sub-maximal veloergometric loading. The activity parameters of 5 lower limb muscles such as semitendinosus, rectus femoris, biceps femoris, gastrocnemius medialis, and tibialis anterior were measured and analyzed during the veloergometric exercise tests and the heart rate and the aerobic capacity were estimated from registered data. The obtained aerobic parameters allow setting an individual and overall voluntary physical capacity. The regression oxygen function presented allows analyzing and predicting the ability of subjects to generate energy while maintaining muscle activity during the exercise. The correlation between the consumption of oxygen and constant physical loading time is determined. It was found that comparing VO2max capabilities the physical effort in the male group was 16% higher than in women. Oxygen consumption and maximum muscle effort dependency on the load time was established. It was observed that the maximal muscular effort appeared before VO2max reached maximal limit in both groups. The maximal oxygen consumption is achieved in the middle or sometimes at the beginning (depending on load) of exercise while maximal muscular effort was found in several phases of cycling: at the beginning and at the end of loading time.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2015, 17, 3; 109-118
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High frequency of doubled haploid plant production in spelt wheat
    Autorzy:
    Lantos, C.
    Jenes, B.
    Bona, L.
    Cserhati, M.
    Pauk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/19813.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    This is the first study to report an efficient anther culture (AC) method for spelt wheat, which has an increasing importance not only in applied research but also in organic farming and changing nutritional standards. In this study, an efficient AC protocol has been described for ‘GK Fehér’ spelt wheat. The number of AC-derived embryolike structures (ELS) was 62.2/100 anthers, from which we were able to regenerate 30.6 green plantlets per 100 anthers. The percentage of green plantlets production was 89.0% among the regenerated plantlets, while the phenomenon of albinism was restricted (3.8/100 anthers). Altogether, from AC of ‘GK Fehér’ 306 green plantlets were produced in vitro and 241 plants were acclimatized to the greenhouse conditions. Based on ploidy level analyses, 83 spontaneous doubled haploid (DH) plants were produced (8.3 DH plants/100 anthers), so the percentage of spontaneous rediploidization was 34.4%. The spontaneous DH plants produced fertile spikes, while a few seeds were harvested from seven partially fertile plants.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2016, 58, 2
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research of the spatial-temporal gait parameters and pressure characteristic in spastic diplegia children
    Autorzy:
    Pauk, J.
    Ihnatouski, M.
    Daunoraviciene, K.
    Laskhousky, U.
    Griskevicius, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/306432.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    porażenie obustronne
    stopa
    chód
    orteza
    rozkład ciśnień
    spastic diplegia
    spatial-temporal parameters
    gait
    pressure distribution
    ankle-foot orthosis
    Opis:
    Purpose: Spastic diplegia is the most common form of cerebral palsy. It presents with symmetric involvement of the lower limbs and upper limbs. Children with spastic diplegia frequently experience problems with motor control, spasticity, and balance which lead to gait abnormalities. The aim of this study is twofold. Firstly, to determine the differences in spatial-temporal gait parameters and magnitude of plantar pressure distribution between children with spastic diplegia (CP) and typical children. Secondly, to compare and evaluate main changes of plantar pressure and spatial-temporal gait parameters instead of data between spastic diplegia children with prescribed ankle – solid foot orthosis (AFOs) and without using AFOs. Methods: The evaluation was carried out on 20 spastic diplegia children and 10 agematched children as a control group aged 6–15 years. Twenty children with spastic diplegia CP were divided into two groups: ten subjects with prescribed AFOs and ten subjects without use of assistive device. Patients used the AFOs orthosis for one year. Measurements included in-shoe plantar pressure distribution and spatial-temporal gait parameters. Results: Spatial-temporal gait parameters showed meaningful difference between study groups in velocity, stride length, step length and cadence ( p < 0.05). However no significant differences between patients with and without AFOs were found ( p > 0.05). Significant differences between typical and spastic diplegia children with AFOs were observed in the magnitude of plantar pressure under the toes, the metatarsal heads, the medial arch, and the heel ( p < 0.05). For typical subjects, the highest pressure amplitudes were found under the heel and the metatarsal heads, while the lowest pressure distribution was under the medial arch. In CP patients the lateral arch was strongly unloaded. The peak pressure under heel was shifted inside. Conclusions: Collected data and calculated scores present a state of the gait in test groups, showed the difference and could be valuable for physicians in decision making by choosing qualitative therapy. Furthermore, it allows predicting probability of further possible changes in gait of spastic diplegia patients with AFOs and without it. In conclusion, our current results showed that the use of AFOs, prescribed on a clinical basis by doctors improves gait patterns and gait stability in children with spastic cerebral palsy.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2016, 18, 2; 121-129
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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