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EN
The aim of this study was to determine direction, rate and character of the changes in coniferous forest communities caused by anthropogenic stress factors (alkaline emission and imission) changing with time. To fulfil this goal, we have performed comprehensive studies of soils and plants at the study sites located in coniferous forest communities remaining under direct influence of cement and lime industry in the Świętokrzyskie Voivodeship. There were differences in the accumulation of elements in pine needles collected at alkalized sites in comparison with needles from the control site: Ca content was 2.5 times higher and Cu, Pb and Sr contents were 2–3 times higher, while Al and Fe, and Mn contents were twice and 10 times lower respectively. SEM analysis of morphological features of pine needle surface, in particular degree of preservation of epicuticular waxes can be as an indicator of assimilatory organ degeneration caused by dust deposition which induces wax layer erosion. Declining species number and biodiversity, particularly conspicuous at the Sitkówka site, was a general tendency observed over the study period (from 18 to 10 years). Other noticeable processes include slow regenerative changes of the community with a tendency towards higher contribution of acidophilic coniferous forest species with lower light and temperature requirements and suppression of meadow, ruderal and associated taxa. Further studies are required in order to define succession rate and direction of changes in species composition of these communities.
EN
The article revolves around the research activity of the historian Ludwig Wachler, professor at the University of Wrocław in the years 1815-1838. In his work, Wachler represents the early German patriotism, for which he was subject to police repression. He is shown primarily as a historian of national literature.
EN
Agricultural activity, especially agricultural mechanization, leads to acceleration of erosion in rolling and hilly country. The level of the erosion process, already during territorial observations, may be assessed by the thickness of the humus horizon. In the vicinity of Bytów, the deluvial humus horizons have even achieved thickness of 100 cm. These horizons are also richer in organic matter than humus horizons located on flat-topped mountains and mountain sides. Deluvial horizons are characterized by a somewhat less acid reaction, sometimes even neutral, and somewhat greater dehydration of the sorption complex by alkaline cations.
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This paper presents an analysis of groundwater from the intakes “Park” and “Motława” situated in Tczew (Poland). These water intakes have varied hydrological conditions and volume of utilized resources (wells). In this area, the deepest drillings extend to 180 m (cretaceous stage) with 20% being constituted by tertiary-quaternary formations with depths ranging from 60 to 63.7 m. The distribution of water from the intakes depended on the population to which it was supplied and the average production of water ranged from 5,802.4 to 7,591.5 m3 per day on “Motława” intake and from 3,196.3 to 4,125.4 m3/day on “Park” intake and did not exceed the production capacity specified by the regulations. In 1994–2009, analyses of water intended for consumption from the above-mentioned intakes in Tczew were performed by testing the water reaction and the content of ammonium ions and chlorides. In the period of the studies, the permissible reaction was not exceeded and the concentrations of ammonium ion and chlorides were on a relatively steady level.
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Content available remote Staropolskie konstrukcje z przyimkami. Krótka synteza
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EN
Structures with prepositional expressions constitute a large collection of Old Polish constructions that underwent multiple linguistic processes. As the starting point of my considerations, I assume that prepositions are not functional syntactic units. A syntactic unit, i.e. an element, is a prepositional expression, i.e. a preposition together with the nomen in the appropriate case. Prepositional expressions are an analytical form that is functionally equivalent to an inflectional case, a synthetic form. Structures with cases are considerably lexicalized in Old Polish, and the processes in which they participate are not innovative – while processes in which prepositional expressions take part radically reorganize the area of relations based on categorical spacial meanings. It is mainly the preposition itself that carries the meaning, while other ingredients of the context, especially the nomen linked by the preposition, must harmonize with it. All the other categorical spacial meanings, of which there is more than fifty, are created with the participation of a broader context. Taking this into account, I consider a majority of categorical non-spacial meanings to be transformations of spacial meanings. They can be more or less distinct; the less distinct they are, the greater the probability of a rise of government, i.e. of a formal schema “announced” by the verb.
PL
Wykonano analizę produktów reakcji odkażalników ORO i C9 oraz ich czynników aktywnych—etanolanu sodowego, aminomonoetanolanu sodowego i 2-etoksyetanolanu sodowego z fosforoorganicznym związkiem trującym VX. Stwierdzono, że reaktywność aminomonoetanolanu sodowego w tej reakcji jest znacznie mniejsza od reaktywności etanolanu sodowego i 2-etoksyetanolanu sodowego. Głównym produktem odkażania VX za pomocą odkażalnika ORO jest O,O'-dietylometylofosfonian, a za pomocą odkażalnika C9: O-etylo-O'-etoksyety- lometylofosfonian.
EN
The analysis of the products of warfare agent VX reaction with decontaminants ORO and G9 as well as their active components — sodium ethanolate, sodium aminomonoethanolate and sodiam 2ethoxyethanolate has been performed. It was stated that the reactivity of sodium aminomaaoethanolate at this reaction is considerably lower than the reactivity of sodium ethanolate and sodium 2-ethoxyethanolate. The main product of VX reaction with decontaminant ORO is O,O'-diethylmethylphosphonate and the product of reaction with decontaminant C9 is O-ethyl-O'-ethoxyethylmethylphosphonate
EN
Aim: To investigate the influence of muscle soreness on the speed of performing a motor reaction speed task in football goalkeepers. Methods: Twenty-four young healthy football goalkeepers, aged 1618 years old (average 16.7 ±0.67 year), with an average body height of 175.6 ±5.4 cm and body weight of 65 ±5 kg, participated in a study conducted during a 6-day training camp. The first day, referred to as day 0, was intended for initial tests and the following 5 days, referred to as days 15, consisted of training. On day 0, before the training period, anthropometric parameters such as weight and height were measured, subjects were questioned to determine the rate of perceived exertion (RPE) and perceived psychophysical readiness (PPR), a speed test with motor reaction choice (ST) was performed using a Smart Speed System and areas with muscle soreness (MS) were recorded by means of a computer tablet with the Navigate Pain application. The goalkeepers participated in two training sessions on each of the following 5 days. Before each training session, the same speed test was performed. Lap times for 5 m and 15 m were recorded. After the second training session each day, the participants drew digital pain maps using a computer tablet, marking separate areas of the body where they felt muscle soreness. These data were consolidated and the total area was analyzed to investigate if, throughout the training, there were any changes to the size of the area that was indicated as having MS. A categorization of body areas was also made to determine areas where muscle soreness was most frequently indicated. Each training session was monitored with heart rate (HR) registration and each goalkeeper determined his fatigue (RPE) and readiness to exercise (PPR) on a 110-point scale. Results: Twenty-three out of twenty-four (98.5%) goalkeepers indicated that they had MS during the study. Day 2 showed the highest incidence rate with 21 participants indicating that they felt MS. The biggest area of MS was also indicated on day 2, yet statistical analysis did not show significant differences in the area of MS between the training days. MS was most often indicated in the upper leg, i.e. the thighs. The average time of the first 5 m was 1.3 [s] (SD = 0.09), ranging from 1.28 [s] to 1.33 [s], while the average time of the following 10 m was 2.07 [s] (SD = 0.18), ranging from 2.04 to 2.1 [s]. The average total speed test time equaled 3.37 [s] (SD = 0.21), ranging from 3.33 to 3.38. Statistical analysis did not show significant differences in any of the results between the training days. Conclusions: Most of the goalkeepers felt muscle soreness as an effect of specific goalkeeper training, measured by indicating painful zones on digital pain drawings. In this study, where muscle soreness was induced by technical-tactical specific goalkeeper training, no significant changes were noticed in the speed of performing a motor speed test with reaction choice or on the area of muscle soreness indicated on digital pain drawings, although almost every goalkeeper had a large area of muscle soreness. Discussion: Many studies show that delayed onset muscle soreness (DOMS) causes a decrease in strength, power, range of motion and speed. However, in many cases, these studies are designed to induce high intensity DOMS and then conduct isolated motor skill tests. In this study the objective was not to induce high intensity DOMS but to investigate the effect of muscle pain, which is present naturally during training processes, and then assess its effect on a speed test which reflects real game situations – with a component of reaction choice and change of movement and direction. Approaching the subject from a different viewpoint allows us to see that the reliable assessment of the psychophysical state of players, made by observing their actions on the pitch or even using photocells to measure motion speed, is difficult without an insight into the parameters of soreness that players experience. These can be monitored, for example, through digital pain mapping software.
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Content available remote Przegląd metod oceny oddziaływania budynku na środowisko
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PL
Trwały, stabilny rozwój gospodarczy nacechowany troską o przyszłe generacje jest deklarowany jako metoda i praktyka działania również w budownictwie. Spełnienie wymagań rozwoju zrównoważonego polega na realizacji wielu różnorodnych i interdyscyplinarnych zadań, które biorą pod uwagę środowisko naturalne, gospodarkę i elementy socjalne. Takie rozszerzenie tradycyjnego pojmowania budynku, jako zbioru cech technicznych wprowadza konieczność rozwijania metod badawczych dotychczas niestosowanych w budownictwie. Analogicznie do miar ekonomicznych takich jak wskaźnik dobrobytu lub wskaźnik zrównoważonego rozwoju wprowadzane są miary spełnienia wymagań rozwoju zrównoważonego dla budynków. Niniejszy artykuł przedstawia metodologię tworzenia takich miar i dokonuje przeglądu opracowywanych w wybranych krajach systemów oceny oddziaływania na środowisko obiektów budowlanych.
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The article presents results of studies on the influence of the cutting wedge geometry on the parameters of the work material and the value of the coefficient of friction between the cutting wedge and work material on the formation of material reaction to the cutting wedge. The studies were carried out by means of FEA analysis with the application of the ALGOR system that was extended to cover the problems of the contact zone. As a result of the analyses carried out, it was found out that the radius of the cutting edge rounding, coefficient of friction of the cutting wedge against the work material, value of the rake angle and size of the cutting wedge wear band have a decisive influence on the level of material reaction to the cutting wedge. The value of Fp/Fc ratio, i.e. the ratio between the force of material reaction to the cutting wedge (Fp) to the force exciting wedge movement (Fc) in the case of sharp cutting wedges (rn = 0.01 mm, a[alfa]o = b[beta]o = 5°) ranged at the level of 0.3. Direction of reaction was such that the wedge was "pulled out" of the holder. An increase in the radius of the cutting edge rounding (rn) to 1.5 mm caused a rapid decrease in the analysed ratio up to about 0.03 (or lower, depending on the coefficient of friction). Similarly, a decrease in the rake angle of the cutting wedge (y[gamma]o = -7.5) caused a decrease in the studied ratio up to the level of 0.1. Also the direction of the Fp reaction changed. The wedge was pushed out from the work zone. The tendencies observed by the present authors agree with the other results (Ingraffea et al., eds.).
PL
W artykule przedstawiono wyniki badan nad wpływem geometrii ostrza, parametrów skrawanego materiału oraz wielkości współczynnika tarcia ostrza o skrawany materiał na kształtowanie się reakcji materiału na ostrze. Jak wykazują badania (np. Jonak 1994), wartość proporcji składowych całkowitej siły skrawania, tj. stycznej (Fc) do odporowej (Fp), w przypadku skrawania naturalnych materiałów kruchych (skał) waha się w przedziale 0,3-0,6, zależnie od geometrii ostrza czy wlasciwości skrawanego materiału. W niektórych przypadkach może ona osiągać znacznie większe wartosci (1,0-3,5), np. dla stępionych ostrzy stożkowych, w trakcie skrawania np. piaskowców zerwonych, charakteryzujących się dużym współczynnikiem tarcia. Dla stali proporcja ta często waha się na poziomie 1,0-1,25 [3], zależnie od warunków skrawania i właściwości skrawanego materiału. Podobnie w procesie skrawania ceramiki technicznej, w szerokim zakresie parametrów skrawania, rodzaju i stanu ostrza oraz środowiska skrawania, występuje zależność Fp>Fc (Kawalec i in. 2000). Prezentowane badania prowadzono na drodze analiz MES, z wykorzystaniem systemu ALGOR, którego możliwości rozszerzono o zagadnienia kontaktowe. Analizę prowadzono dla płaskiego stanu odkształcenia, zakładając nieskończoną szerokość ostrza i pomijając wpływ oddziaływań bocznych powierzchni ostrza i skały. Przyjęto skrawany ośrodek skalny jako materiał dwuwarstwowy (pomiędzy ostrze a litą skałę wprowadzono warstwę pośrednią, symulującą zachowanie się warstwy miału, jaka powstaje pomiędzy ostrzem a skałą w rzeczywistym procesie skrawania). Analizę przeprowadzono dla różnych kombinacji stałych materiałowych charakteryzujących te warstwy oraz dla liniowej i nieliniowej charakterystyki materiału. W przypadku modelu nieliniowego przyjęto model ciała sprężysto-idealnieplastycznego Drackera-Pragera. W wyniku analizy stwierdzono, że na wartość reakcji materiału na ostrze, spośród jego parametrów geometrycznych, decydujące znaczenie ma promień zaokrąglenia krawędzi skrawającej, wartość kąta natarcia oraz wartość pasma zużycia ostrza. Ponadto, wartość tej proporcji zależy od parametrów charakteryzujących skałę, a w tym współczynnika tarcia ostrza o skrawany materiał, proporcji ich parametrów wytrzymałościowych (fc/ff), założonej sztywności warstw oraz ich liczby Poisssona. Wartość proporcji (Fp/Fc), tj. proporcji siły reakcji materiału na ostrze (Fp) do siły wymuszającej ruch ostrza (Fc), dla ostrza ostrego (rn = 0,01 mm, a[alfa]o = b[beta]o = 5°) wahała się na poziomie 0,3. Kierunek reakcji był taki, że nóż był "wyciągany" z uchwytu. Wzrost promienia zaokrąglenia krawędzi skrawającej (rn) do 1,5 mm powodował gwałtowne zmniejszenie się rozpatrywanej proporcji do wartości około 0,03 (i poniżej, zależnie od współczynnika tarcia). Podobnie, zmniejszanie kąta natarcia ostrza (g[gamma]o = -7,5°), powodowało zmniejszenie się rozpatrywanej proporcji do poziomu 0,1. Zmienił się też kierunek reakcji (Fp). Ostrze było „wypychane" ze strefy skrawania. Zaobserwowane tendencje są zgodne z wynikami innych badań (np. Ingraffea i in., w druku), niemniej niezbędne jest prowadzenie dalszych badań, celem doskonalenia proponowanej metody, zwłaszcza pod kątem opracowania procedur ułatwiających automatyzację niektórych czynności, zwiększenia precyzji obliczeń itd. Oczekuje się, że proponowana metoda stanie się wygodnym narzędziem projektowo - badawczym służącym do szybszego i bardziej efektywnego doboru narzędzi do skrawania określonych formacji skalnych itd.
EN
The aim of the study was to examine the toxic effect of different doses of zearalenone on liver cells by estimating mycotoxin influence on antioxidant systems and on formation of free radicals in the liver. The research was carried out on male Wistar rats. The rats were divided into nine groups of 10 animals each. Group A was orally given 8% ethyl alcohol once a day for 10 d. Groups B, C, D, and E were given, orally once a day 50, 100, 200, and 500 µg/kg b.w. of zearalenone in alcohol solution for 10 days. The animals from groups X, Y. and Z received a single dose of 1, 2, and 3 mg/kg b.w of zearalenone, respectively, and group W (control) - a single dose of 8% ethyl alcohol. The liver was removed and homogenised. Glutathione peroxidase and superoxide dismutase activities, and concentration of L-ascorbic acid in the homogenate were determined. Received outcome and statistical analysis showed the essential fall of superoxide dismutase activity after 10 d of administering 200 and 500 µg/kg b.w of ZEA in comparison with the control group, and drop of glutathione peroxidase activity after 500 µg/kg b.w. dose. The results of the experiment showed that oxidative stress is one of the main toxic effects of zearalenone activity. Low doses of zearalenone applied for a long time do not have an influence on free radical reaction. Short-lasting zearalenone influence does not cause changes in the activity of antioxidant enzymes.
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Content available remote The influence of barium sulphate crystallization parameters on its crystals size
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The research results of barium sulphate crystallization from barium chloride solutions are presented. Barium sulphate was precipitated in the continuous crystallizer with the internal circulation of suspension fed with crystalline ammonium sulphate. The influence of barium chloride concentration in feeding solution, residence time and the temperature on barium sulphate crystals size and growth rate were determined. The advantage of the research results and elaborated relations may be utilised in the post quenching salts treatment process.
EN
The (11Bu+) energy of synthetic 15-cis β-carotene exhibits a linear dependence on (n2-1)/(n2+2) in non-polar and polar solvents; in this it is similar to (that of) all-trans β-carotene. The point of intersection is at (n2-1)/(n2+2) = 0.3 for both isomers. The microenvironment of 15-cis β-carotene in the Photosystem II reaction center was established as having a mean refractive index 1.473. Persistent spectral hole burning with a very broad (≈30 nm) hole observed around 500 nm (corresponding to an extremely short excited lifetime τ ≈9 fs) indicates that 15-cis β-carotene has/displays very efficient photoprotective quenching.
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Content available remote Towards fully predictive CFD modelling of mixing processes
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EN
Computational fluid dynamics (CFD) fundamentals have briefly been presented along with their applications to various mixing processes. On the basis of recently published papers, it was concluded that this analysis reached an advanced stage, being especially valuable in scaling-up and optimisation of mixing equipment. CFD has also promising prospects of further development and integration with other modern modelling methods leading to fully predictive mode of numerical simulations.
PL
Badano osady denne zbiornika Brody Iłżeckie (BI) (N51°00'13" E21°10'01") i Zalewu Zembrzyckiego (ZZ) (N51°10'43" E22°31'25"). Obydwa zbiorniki są podobne pod względem wieku, pełnionych funkcji (rekreacyjne, regulacja przepływu) i powierzchni (260-280 ha). W osadach oznaczono odczyn pH i właściwości sorpcyjne. Osady Zalewu Zemborzyckiego wykazywały odczyn obojętny i alkaliczny, niską kwasowość hydrolityczną i wysokie wysycenie kompleksu sorpcyjnego kationami zasadowymi, szczególnie wapniem. Osady BI wykazały niższe wartości pH, większą kwasowość hydrolityczną, mniejszą całkowitą pojemność sorpcyjną i wysycenie kompleksu sorpcyjnego kationami zasadowymi niż osady ZZ. Zawartość kationów wymiennych w osadach zbiornika BI była znacznie zróżnicowana i zależała od miejsca ich pobrania, natomiast w osadach ZZ była zbliżona bez względu na miejsce ich czerpania. Zbiorniki różniły się (różnice istotne statystycznie) pod względem wszystkich, z wyjątkiem wymiennego K+, badanych cech sorpcyjnych osadów.
EN
Bottom sediments of Brody Iłżeckie (BI) (N51°00'13" E21°10'01") and Zalew Zemborzycki (ZZ) (N51°10'43" E22°31'25") reservoirs have been investigated. Both reservoirs are similar by the age, main functions (flow regulation, recreation), and area (260-280 ha). Reaction (pH) and sorptive properties of sediments have been determined. Sediments of Zalew Zemborzycki showed neutral and alkaline reaction, low hydrolytic acidity and high saturation of sorptive complex with bases, especially with calcium. Sediments of BI had lower values of pH, larger hydrolytic acidity, lower values of cation exchange capacity, and lower base saturation in comparison with the sediments of ZZ. The content of exchangeable cations in the sediments of BI was differentiated and dependent on the sampling site, whereas in the sediments of ZZ reservoir it was close regardless of sampling points. The reservoirs differed (differences statisticaly signifficant) in all, with the exception of exchangeable K+, the studied sorptive features.
PL
Artykuł prezentuje wyniki analiz przeprowadzone na podstawie bazy wyników testów psychologicznych kierowców zawodowych, biorące pod uwagę wskaźniki podatności na dystrakcję i ich zależność od wieku. Wykazano, że z wiekiem maleje szybkość przetwarzania informacji, pojawia się też więcej błędnych decyzji i nieprawidłowości w rozpoznawaniu obiektów. Najsilniejsze obniżenie wyników zaobserwowano w teście wymagającym oceny prędkości i umiejętności antycypowania ruchu obiektów. Generalnie wraz ze wzrostem złożoności zadania wpływ wieku na wskaźniki świadczące o skłonności do rozpraszania w sytuacjach drogowych był większy. Wnioski z analiz pozwalają rekomendować ograniczenie obecności w otoczeniu drogi elementów, takich jak reklamy i inne obiekty mogące powodować rozproszenie użytkowników o osłabionej sprawności procesów uwagi.
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The article presents the results of analyzes carried out based on the results of psychological tests for professional drivers, taking into account indicators of susceptibility to distraction and their dependence on age. It has been shown that with age the speed of information processing decreases, there are also more wrong decisions made, and anomalies in recognizing objects. The strongest decrease in performance was observed in the test requiring the assessment of the speed and ability to anticipate the movement of objects. Generally, with increasing complexity of the tasks the effect of age on the markers of inattention (distracting the attention) in the driving situations, was greater. The conclusions of the analyses allow to recommend limiting the presence in the road vicinity of such elements as advertisements and other objects that may cause attention distraction of the road users with the weakened attention processes.
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