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Tytuł:
Antimicrobial resistance of Escherichia coli and Klebsiella spp. conventionally sampled from factory-farmed chickens – clinical submissions
Autorzy:
Majewski, M.
Józefiak, A.
Kimsa-Furdzik, M.
Dziubdziela, L.
Hudak-Nowak, M.
Wilczyński, J.
Anusz, K.
Powiązania:
https://bibliotekanauki.pl/articles/28762783.pdf
Data publikacji:
2021
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2021, 28, 2; 271-276
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Systemic immune-inflammation index (SII) and neutrophil to lymphocyte ratio (NLR) are useful markers for assessing effects of anti-inflammatory diet in patients before coronary artery bypass grafting
Autorzy:
Szymanska, P.
Rozalski, M.
Wilczynski, M.
Golanski, J.
Powiązania:
https://bibliotekanauki.pl/articles/2086021.pdf
Data publikacji:
2021
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
inflammatory marker
anti-inflammatory diet
omega-3 acid
cardiovascular disease
NLR
markery
stany zapalne
dieta
kwasy tluszczowe omega-3
choroby sercowo-naczyniowe
Opis:
Background. One of the risk factors responsible for coronary artery disease (CAD) is an inadequate diet that is frequently deficient in anti-inflammatory components, such as polyphenols and omega-3 fatty acids. The neutrophil to lymphocyte ratio (NLR) and the systemic immune-inflammation index (SII) are inflammatory markers that may reflect a diet’s anti- inflammatory potential. Objective. The aim of this study was to evaluate the effects that CAD patients’ nutrition patterns have on NLR and SII. Material and methods. A retrospective study assessed the dietary habits and inflammatory marker levels in patients with advanced CAD before they underwent coronary artery bypass grafting (CABG) (n=101). Patients were divided into subgroups based on their NLR and SII levels. Results. Subgroups with lower NLR and SII levels had consumed significantly more eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) (p=0.02). The group with alower ratio of omega-6 to omega-3 fatty acids (<4:1) also had lower NLR and SII levels (p=0.007 and p=0.01, respectively). Statistically significant negative correlations were found between EPA and DHA, as well as omega-3 intake, and both NLR and SII values. No statistically significant differences were found between the subgroups with lower and higher NLR and SII values for polyphenol intakes. Conclusions. Inflammatory markers such as NLR and SII may reflect an anti-inflammatory diet consumed by cardiac patients. A simultaneous assessment of dietary habits and inflammatory parameters is beneficial in the possible prevention of adverse cardiovascular incidents after CABG. There is also a need to establish reference values for SII and NLR
Źródło:
Roczniki Państwowego Zakładu Higieny; 2021, 72, 3; 327-335
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensorless five-phase induction motor drive with third harmonic injection and inverter output filter
Autorzy:
Strankowski, P.
Guzinski, J.
Morawiec, M.
Lewicki, A.
Wilczynski, F.
Powiązania:
https://bibliotekanauki.pl/articles/200259.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sensorless control
five-phase induction motor
inverter output filter
multiscalar control
Opis:
The paper presents a sensorless control approach for a five-phase induction motor drive with third harmonic injection and inverter output filter. In the case of the third harmonic injection being utilised in the control, the physical machine has to be divided into two virtual machines that are controlled separately and independently. The control system structure is presented in conjunction with speed and rotor flux observers that are required for a speed sensorless implementation of the drive. The last section is dedicated to experimental results of the drive system in sensorless operation, and the uninterrupted drive operation for two open-phase faults.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 3; 437-445
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensorless field oriented control for five-phase induction motors with third harmonic injection and fault insensitive feature
Autorzy:
Wilczyński, Filip
Strankowski, P.
Guziński, J.
Morawiec, M.
Lewicki, A.
Powiązania:
https://bibliotekanauki.pl/articles/200614.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fault tolerant control
field oriented control
five-phase induction machine
speed observer
third harmonic flux injection
kontrola tolerancji błędu
pięciofazowa maszyna indukcyjna
obserwator prędkości
Opis:
The paper presents a solution for sensorless field oriented control (FOC) system for five-phase induction motors with improved rotor flux pattern. In order to obtain the advantages of a third harmonic injection with a quasi-trapezoidal flux shape, two vector models, α1–β1 and α3–β3, were transformed into d1– q1, d3– q3 rotating frames, which correlate to the 1st and 3rd harmonic plane respectively. A linearization approach of the dual machine model in d – q coordinate frames is proposed by introducing a new additional variable “x” which is proportional to the electromagnetic torque. By applying the static feedback control law, a dual mathematical model of the five-phase induction motor was linearized to synthesize a control system in which the electromagnetic torque and the rotor flux can be independently controlled. The results shows the air gap flux shape in steady as well transient states under various load conditions. Moreover, the implemented control structure acquires fault tolerant properties and leads to possible emergency running with limited operation capabilities. The fault-tolerant capability of the analyzed machine was guaranteed by a special implemented control system with a dedicated speed observer, which is insensitive to open-phase fault situation. The experimental tests have been performed with single and double-open stator phase fault. A torque measurement was implemented to present the mechanical characteristics under healthy and faulty conditions of the drive system.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 2; 253-262
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural Aging and Degradation of Human Fingernail Plates Upon Cosmetic Agents
Autorzy:
Kulesza, S.
Bramowicz, M.
Gwoździk, M.
Wilczyński, S.
Goździejewska, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/354662.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Atomic Force Microscopy
Scanning Electron Microscopy
fractal characterization
nanoscale property mapping
Opis:
The knowledge whether and how chemical species react with tissues is important because of protection against harmful factors, diagnose of dermatological diseases, validation of dermatological procedures as well as effectiveness of topical therapies. In presented work the effects of chemical agents on plates of human fingernails were studied using Atomic Force Microscopy and Scanning Electron Microscopy. Apart from that, mapping of the elastic properties of the nails was also carried out. To obtain reliable measures of spatial evolution of the surface variations, recorded images were analyzed in terms of scaling invariance brought by fractal geometry, instead of common though not unique statistical measures.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 1; 181-184
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The growth of seven Abies grandis provenances in the climatic conditions of the Polish Carpathian Mountains
Autorzy:
Wilczynski, S.
Kulej, M.
Powiązania:
https://bibliotekanauki.pl/articles/2077766.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
grand fir
dendrochronology
dendroclimatology
survival
growth parameters
Opis:
The introduction of foreign tree species to new areas facilitates an increase in species biodiversity and possibilities for growth of tree stands. Many years of research related to survival rate, basic growth features and evaluation of a sensitivity to climatic conditions of a new habitat is necessary to achieve a successful introduction. The paper presents the results of the research on the adaptation of grand fir to the climatic conditions in the provenance trial located in the lower montane forest belt. The dendroclimatic research has concerned the offsprings of 7 grand fir provenances originated from North America. A total of 24 trees from each provenance were selected and two cores from each tree were taken. Principal component analysis of tree-ring widths was used to classify the provenances. The climate elements described by PC1 and PC2 were identified on the basis of bootstrap correlation function. Survival rate, height and diameter at breast height of trees were also analysed. The features of the studied provenances showed significant differences. The variation of the inter-provenance survival rate and the increase in tree height of particular provenances were determined principally by the genotype. Grand firs trees from Region I exhibited superior survival rates and better dynamic increases in tree height. The variability of these two features had the character of clinal variation because they primarily depended on the elevation and the latitude of the maternal tree stands. Two groups of provenances which were connected with the regions of their natural distribution were characterized on the basis of the features of the short-term rhythm of the radial increments. The provenances of two specific groups revealed different sensitivity to temperature, rainfall, humidity and sunshine. The greatest effect on the variation of radial increments had been produced by the moisture and pluvial factors whilst the solar factor had produced the least effect on it. The air temperature made also a relatively high contribution to their radial increments. Grand fir trees from the Salmon River provenance in British Columbia provided the best trees from the cultivation point of view. The provenances from Vancouver Island and the western slope of the Cascadian Mountains in Washington State have been regarded as the best for introducing and acclimatising to the conditions of the Carpathian Mts.
Źródło:
Dendrobiology; 2019, 81; 1-13
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adaptacja jodły jednobarwnej oraz jodły pospolitej do warunków klimatycznych nizin zachodniej Polski
Adaptation of silver and white fir to the climate of lowlands in western Poland
Autorzy:
Wilczyński, S.
Olejnik, M.
Szymański, N.
Powiązania:
https://bibliotekanauki.pl/articles/986632.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
Abies concolor
lesnictwo
drzewa lesne
jodla pospolita
Abies alba
jodla jednobarwna
przystosowanie do srodowiska
analiza dendrochronologiczna
warunki klimatyczne
niziny
Polska Zachodnia
Nadlesnictwo Rzepin
abies alba
abies concolor
dendroclimatology
Opis:
The study analysed the causes of the annual variation of tree−ring widths of silver fir and white fir. The partial populations of both fir species has been growing for over 100 years in Rzepin (western Poland) in a fresh broadleaved forest site. We assumed that the year−to−year changes of the size of radial increment presents sensitivity of trees to local climate factor. The period from 1931 to 2015 was analysed. We found that the silver and white firs had high homogeneity of radial growth responses and sensitivity to year−to−year changes of weather conditions. Warm November of the previous year, short winter and high air temperature in August had positive influence on the size of their radial increment. Moreover, precipitation in February, April and July of the year of tree−ring formation contributed to wider tree−ring. The white fir was highly resistant to winter frost in contrast to the silver fir. In addition, this fir species preferred cold springs. Furthermore, the silver fir suffered from overabundant precipitation in August. The climate conditions of western lowland part of Poland were not a limiting factor for growth of both species because the studied populations achieved the highest site index class.
Źródło:
Sylwan; 2018, 162, 03; 220-230
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anti-inflammatory effect on genes expression after four days of Qigong training in peripheral mononuclear blood cells in healthy women
Autorzy:
Półrola, P.
Wilk-Frańczuk, M.
Wilczyński, J.
Nowak-Starz, G.
Góral-Półrola, J.
Chrusciński, G.
Bonisławska, I.
Pedrycz, A.
Żychowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/2081731.pdf
Data publikacji:
2018
Wydawca:
Instytut Medycyny Wsi
Tematy:
qigong
genes expression
heat shock protein
inflammation
Opis:
Introduction. Some studies have shown the influence of Qigong on gene expression in different cells, but there is little data associated with the influence of this kind of therapy on genes expression in pheripheral monocellucar blood cells. Objective. The aim of this study was to evaluate changes in the expression of genes associated with cellular stress response in peripheral mononuclear blood cells (PMBC) in healthy women. Materials and method. The experiment took place at the Japanese Martial Arts Centre “DOJO” in Stara Wieś, Poland, conducted over the course of a 4-day qigong training session. To evaluate the genes effect of this training, blood samples were taken before and after the training period. This experiment involved 20 healthy women (aged 56.2±9.01, body height 164.8±6.5 and mass 65.5±8.2). To determine the expression of HSF-1, HSPA1A, NF-kB, IL10 and CCL2 mRNA, 3 ml of venous blood was collected. The blood samples were placed in tubes allowing for separation (BD Vacutainer CPTTM) before and after the 4 days of qigong training. Isolated PMBC were used to determine gene expression using real-time qRT-PCR (quantitative reverse transcription polymerase chain reaction). Results. Significant decreases in NF-kB and CCL2 mRNA and increases in IL10, HSF1 and HSPA1A m-RNA were detected after 4 days of qigong training. The obtained findings suggest that qigong caused a reduction in the inflammatory and intensified anti-inflammatory gene expression, as well as a higher expression of HSF-1 and HSPA1A. Conclusion. The adaptive response to qigong training was similar to the adaptive response to physical activity and was detected through gene expression in PMBC. Furthermore, this kind of training is especially indicated for women because of their higher susceptibility to psychosocial stress when compared to men.
Źródło:
Annals of Agricultural and Environmental Medicine; 2018, 25, 2; 329-333
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jakość życia u chorych z jadłowstrętem psychicznym – badanie przeglądowe
Quality of life in anorexia nervosa patients – a review study
Autorzy:
Zasada, Ida
Wilczyński, Krzysztof M.
Żmijowska, Anna
Janas-Kozik, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/942140.pdf
Data publikacji:
2018
Wydawca:
Medical Communications
Tematy:
jadłowstręt psychiczny
jakość życia
zaburzenia odżywiania
Opis:
Introduction: An eating disorder is a disease entity characterised by an inadequate or excessive eating pattern or anxiety over one’s appearance. One of its possible forms is anorexia nervosa. Apart from the mental symptoms related to the distorted perception of one’s own body, the hallmark of the condition is the presence of serious somatic complications caused by extreme weight loss. As the affected individuals rarely seek medical help despite an objective decline in overall functioning, it seems worthwhile investigating how they subjectively assess their own quality of life. Aim: To conduct a comprehensive review of studies investigating the quality of life of anorexia nervosa patients. Method: MEDLINE/PubMed, Cochrane Library and Google Scholar electronic repositories were searched for relevant studies in Polish and English published over the past 5 years (2013–2018), selected according to the use in titles and abstracts of the following keywords: “anorexia nervosa,” “eating disorders,” “quality of life”, “QoL” in Polish and English. The repositories were searched independently by each of the authors, and the selected publications were compared to exclude any duplicates. The review covered a total of 25 publications, out of which 13 were analysed in detail as best matches for this study. Conclusions: The reviewed studies demonstrated a deteriorated quality of life in patients suffering from anorexia nervosa. Patients who receive treatment may improve their quality of life, which, however, even in the case of remission has been found to remain lower than in the general population.
Wstęp: Zaburzenia odżywiania są jednostką kryterialną charakteryzującą się niewystarczającym lub nadmiernym wzorcem odżywiania czy też lękiem związanym z wyglądem własnego ciała. Jedną z ich postaci jest jadłowstręt psychiczny. Oprócz objawów psychicznych związanych między innymi z zaburzonym postrzeganiem własnego ciała charakterystyczne jest występowanie powikłań somatycznych wynikających ze znacznego ubytku wagi. W związku z faktem, że pomimo obniżenia obiektywnej jakości funkcjonowania osoby te rzadko poszukują pomocy lekarskiej, interesująca wydaje się ich subiektywna ocena jakości życia. Cel: Systematyczny przegląd piśmiennictwa dotyczącego badań na temat jakości życia u pacjentów z jadłowstrętem psychicznym. Metoda: Przegląd prac w języku polskim i angielskim z okresu ostatnich 5 lat (2013–2018), pozyskanych z elektronicznych baz MEDLINE/PubMed, Cochrane Library, Google Scholar, na podstawie słów kluczowych: „jadłowstręt psychiczny”, „zaburzenia odżywiania”, „jakość życia”, anorexia nervosa, quality of life, „QoL”, eating disorders, pojawiających się w tytułach oraz abstraktach. Wyżej wymienione bazy były przeglądane niezależnie przez każdego autora, a następnie wybrane publikacje zostały ze sobą zestawione w celu wykluczenia duplikatów. Ostatecznie do analizy włączono 25 publikacji, z czego 13 zostało poddanych szczegółowemu opracowaniu jako najbardziej zgodne z tematyką przeglądu. Wnioski: Badania wykazały niższą jakość życia u osób chorujących na jadłowstręt psychiczny. U osób, które podjęły leczenie, jakość życia może się poprawić, jednak i tak będzie niższa niż w populacji ogólnej, mimo remisji choroby.
Źródło:
Psychiatria i Psychologia Kliniczna; 2018, 18, 2; 212-216
1644-6313
2451-0645
Pojawia się w:
Psychiatria i Psychologia Kliniczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surgical treatment of large-cell neuroendocrine cancer of the lung in a patient with situs inversus totalis
Autorzy:
Prystupa, T.K.
Sagan, D.
Wilczynski, G.
Sawicki, M.
Powiązania:
https://bibliotekanauki.pl/articles/3477.pdf
Data publikacji:
2018
Wydawca:
Instytut Medycyny Wsi
Źródło:
Journal of Pre-Clinical and Clinical Research; 2018, 12, 3
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Seebeck Effect in Double Tunnel Junctions with Ferromagnetic Electrodes and Central Layer Separated by Nonmagnetic Barriers
Autorzy:
Wilczyński, M.
Powiązania:
https://bibliotekanauki.pl/articles/1030503.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.20.Pa
73.40.Gk
73.40.Ty
73.50.Lw
Opis:
The Seebeck effect is analysed in the double planar tunnel junctions consisting of ferromagnetic electrodes and the central layer separated by nonmagnetic barriers with the arbitrary angle between magnetic moments in neighbouring ferromagnetic layers. The Seebeck coefficient is calculated as a function of the thickness of the central layer. The influence of temperature of the junction and the relative orientation of magnetic moments in ferromagnetic layers on this coefficient is also analysed. Calculations are performed in the linear response theory using the free-electron model. It has been found that the Seebeck coefficient oscillates with the thickness of the central layer and can be strongly enhanced in the junction with special central layer thickness due to electron tunnelling by resonant states. The form of the observed oscillations depends on the temperature of the junction. The magnitude of the Seebeck coefficient usually increases with the increase of the angle between magnetic moments in the neighbouring ferromagnetic layers as in the case of single junctions. However, in the junctions with the specially designated central layer the decrease of the magnitude of the Seebeck coefficient with the increase of this angle can be observed.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 544-547
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zaburzenia poznawcze w przebiegu migotania przedsionków
Cognitive decline pursuant to atrial fibrillation
Autorzy:
Wilczyński, Krzysztof M.
Wizner-Wilczyńska, Dominika
Martyniak, Ewa
Krzystanek, Marek
Powiązania:
https://bibliotekanauki.pl/articles/941422.pdf
Data publikacji:
2017
Wydawca:
Medical Communications
Tematy:
epidemiologia
migotanie przedsionków
patofizjologia
zaburzenia poznawcze
Opis:
Introduction: The influence of atrial fibrillation on the development of cognitive deficits, which are subtle, yet burdensome for the patients, and are independent of hypertension and past strokes, has been widely discussed in literature. The aim of our study was to review the available publications concerning the pathogenesis and epidemiology of cognitive decline pursuant to atrial fibrillation. Methodology: A systematic review of literature published between January 2006 and December 2016 has been conducted, utilising PubMed, Cochrane Library and Google Scholar search engines. Thirty-two out of 633 Polish and English publications were ultimately covered by the study, along with 8 out of 16 reference included in the analysed papers. Results: The majority of authors agree that the link between atrial fibrillation and cognitive decline and occurrence of dementia is undisputable. The high risk for the occurrence of a stroke in the course of atrial fibrillation, which is twice the risk found in healthy persons, seems to be the most plausible explanation for the aforementioned correlation. However, in most studies the exclusion of patients with a history of stroke did not significantly affect the risk for cognitive decline. In some studies, a decrease in the volume of some central nervous system structures was also reported, especially affecting the hippocampus, yet the results remain equivocal. Some authors describe a link between decreased blood flow in the middle cerebral artery in elderly patients and the occurrence of cognitive impairment. This mechanism, however, was analysed in relatively small groups, with a high mean age of the included patients. The most recent studies focus on hypotheses concerning abnormalities in cytokine levels, although significant differences in the methodology utilised in those analyses have not permitted to identify their role in the process. Conclusions: Despite the apparently undisputable link between atrial fibrillation and cognitive decline, the underlying mechanism remains unclear. Hence the need for further research in this area, aimed at determining the specific pathomechanism reliable for the association of these two phenomena.
Wstęp: W literaturze można znaleźć liczne doniesienia opisujące wpływ migotania przedsionków na rozwój niezbyt nasilonych, lecz uciążliwych dla pacjenta zaburzeń poznawczych, niezależnych od ciśnienia tętniczego czy też przebytych udarów mózgu w przeszłości. Celem pracy był przegląd piśmiennictwa dotyczącego patomechanizmu i epidemiologii zaburzeń poznawczych w przebiegu migotania przedsionków. Metodologia: Przeprowadzono systematyczny przegląd publikacji z okresu od stycznia 2006 do grudnia 2016 roku związanych z tematyką pracy, wykorzystując bazy PubMed, Cochrane Library i Google Scholar. Uwzględniono 32 z 633 znalezionych polsko- i anglojęzycznych prac oraz 8 z 16 pozycji pochodzących z bibliografii analizowanych publikacji. Wyniki: Autorzy większości publikacji są zgodni, że związek pomiędzy migotaniem przedsionków a pogorszeniem zdolności poznawczych i wystąpieniem demencji jest niepodważalny. Wydaje się, że najprostszym mechanizmem ich powstawania są udary mózgu, których ryzyko w przebiegu migotania przedsionków jest dwukrotnie wyższe niż u osób zdrowych, lecz ich wykluczenie z grupy badanej u większości autorów nie wpływało w istotny sposób na uzyskane wyniki. W kilku badaniach wykazano zmniejszenie objętości poszczególnych struktur ośrodkowego układu nerwowego, zwłaszcza w obrębie hipokampa, jednakże wyniki są niejednoznaczne. Wykazywano również, że spadek przepływu w tętnicy środkowej mózgu u osób starszych był w istotny sposób powiązany z wystąpieniem zaburzeń poznawczych. Mechanizm ten był jednak badany w relatywnie małych grupach, o wysokiej średniej wieku. Najnowsze badania skupiają się także na hipotezach związanych z zaburzeniami w poziomach cytokin, lecz duże zróżnicowanie metod badania nie pozwoliło dotychczas jednoznacznie określić ich roli w tym procesie. Wnioski: Pomimo iż związek zaburzeń poznawczych i migotania przedsionków wydaje się niepodważalny, niejasne pozostają dokładne mechanizmy prowadzące do ich wystąpienia, co wskazuje na potrzebę dalszych badań w celu stworzenia wiarygodnego modelu ich rozwoju.
Źródło:
Psychiatria i Psychologia Kliniczna; 2017, 17, 3; 183-188
1644-6313
2451-0645
Pojawia się w:
Psychiatria i Psychologia Kliniczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adaptacja wybranych pochodzeń modrzewia europejskiego do klimatu nizin centralnej Polski
Adaptation of the selected provenances of European larch to climate of lowlands in central Poland
Autorzy:
Wilczyński, S.
Szymański, N.
Olejnik, M.
Powiązania:
https://bibliotekanauki.pl/articles/989610.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
modrzew europejski
Larix decidua
proweniencje
wzrost roslin
przyrost drzew
czynniki klimatyczne
doswiadczenia proweniencyjne
Polska Centralna
larix decidua
climate
radial increment
provenance trial
Opis:
The study evaluated the sensitivity of European larch (Larix decidua) of two provenances to thermo−pluvial conditions on the provenance plot located in Sękocin Stary (52°05‵ N, 20°51‵ E, 125 m a.s.l.). The studied larches originated from Pelplin (lowland, northern Poland, 50 m a.s.l.) and Szczytna (upland, southern Poland, 525 m a.s.l.). The trees of both provenances differed in terms of their quantitative and qualitative breeding characteristics. The trees originated from different climatic regions whose climate was also different from the climate of the provenance plot. Values of the size of the radial increments measured at cores extracted from the trees were the measure of their sensitivity to the climatic factor. The cluster and principal component analyses were used to classify the trees according to their features of the short−term rhythm of the radial increments. The response function and pointer years analyses were used to evaluate climate−growth relationships. The results of the study show the trees of both provenances have similar sensitivity to the thermo−pluvial conditions in the previous September, the temperature in March and the precipitation in May of the year of tree−ring formation. The larches of Pelplin provenance, in contrast to the trees of Szczytna provenance, were sensitive to the low temperature in February and the low precipitation in the growing season. These features could be one of the causes of the lower incremental abilities of the trees of Pelplin provenance. The larches of Szczytna provenance had higher frost tolerance in February and drought tolerance in summer.
Źródło:
Sylwan; 2016, 160, 08; 656-665
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie przepływu kompozytów polimerowo-drzewnych w procesie wytłaczania jednoślimakowego
Study on the flow of wood-plastic composites in the single-screw extrusion process
Autorzy:
Wilczyński, K.
Buziak, K.
Bartnik, M.
Powiązania:
https://bibliotekanauki.pl/articles/947242.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
wytłaczanie jednoślimakowe
kompozyty polimerowo-drzewne
mechanizm uplastyczniania
single-screw extrusion
wood-plastic composites
melting mechanism
Opis:
Zbadano doświadczalnie przepływ kompozytu polimerowo-drzewnego o zawartości 70 % mas. mączki drzewnej w procesie wytłaczania jednoślimakowego, w różnych warunkach technologicznych przetwórstwa. Przebieg uplastyczniania i przepływu tworzywa oceniono na podstawie tzw. zimnego eksperymentu wytłaczania, z zastosowaniem techniki wyciągania ślimaka. Na podstawie wyników badań zaproponowano mechanizm uplastyczniania jednokierunkowego. Stwierdzono, że modelowanie procesu wytłaczania kompozytów polimerowo-drzewnych wymaga odmiennego podejścia niż modelowanie wytłaczania tworzyw termoplastycznych.
Experimental studies have been done on the flow of wood-polypropylene composite with 70 wt % wood flour loading under various processing conditions of single-screw extrusion. The plasticization and flow of the polymer were evaluated on the basis of so-called cold extrusion experiment using „Screw Pulling-out Technique”. It was stated that the flow of wood-plastic composites is essentially different from the flow of thermoplastics. The flow is accompanied by slipping at the barrel walls, screw and die surfaces, also it shows ayield stress. Melting of the composite with high wood-flour content does not proceed according to the well known Tadmor model. Based on the results of the investigations, one-dimensional model of melting has been proposed. It was stated that the modeling of wood-plastic composite extrusion process requires a different approach then that used to model the extrusion of thermoplastic polymers.
Źródło:
Polimery; 2016, 61, 3; 195-201
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the wind speed limits causing the break away of the vessel from jetty p in naftoport : simulation study
Autorzy:
Formela, K.
Gil, M.
Śniegocki, H.
Wilczyński, P.
Powiązania:
https://bibliotekanauki.pl/articles/244147.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
mooring
tankers
simulation
oil terminal
Naftoport
Opis:
The safety of the tanker during the loading operations carried out in the oil terminal is influenced by many factors. Based on the observations of port personnel and weather analyses in that area it was found that for Naftoport one of the most important factors affecting the security of the tanker is the wind, and more precisely – its direction and speed. Less important are accompanying waves and generated by it variable and periodic wind current. In this selected area of the Baltic Sea the direction and speed of wind change very dynamically depending on the activity of pressure patterns, which are very closely related to the occurrence of seasons. For the purpose of the article simulations were carried out of variable wind speeds, from directions causing the breakaway of the ship from the jetty, with an application of the model of the tanker in the least favourable load condition. The results obtained – the load in the mooring ropes from simulation tests were compared with the requirements of the OCIMF (Oil Companies International Marine Forum), determining the methodology of performing calculations of these forces for the selected type of tanker.
Źródło:
Journal of KONES; 2016, 23, 4; 99-108
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 60

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