Informacja

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

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "apparent" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 107
Tytuł:
Apparent masses and inertia moments of the parafoil
Autorzy:
Kowaleczko, G.
Powiązania:
https://bibliotekanauki.pl/articles/280564.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
apparent mass
parafoil
Opis:
This paper presents a useful method of determination of additional forces and moments which have to be taken into account in analysis of a parafoil or paraglider flight dynamics. They are produced by apparent masses and apparent inertia moments of the air. These masses and inertia moments have strong effects on the flight dynamics of a lightly-loaded parafoil. The equations of motion for the parafoil-payload system are also shortly presented. An analytical method of calculating of the apparent masses and inertia moments is shown. Exemplary results are presented.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 3; 605-616
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Blokowanie mechanizmów działań pozornych w systemie edukacji - wymogiem jego rewitalizacji; głos w dyskusji
Blocking Mechanisms of Apparent Actions in Education System
Autorzy:
Dudzikowa, Maria
Powiązania:
https://bibliotekanauki.pl/articles/465208.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Komitet Prognoz Polska 2000 Plus PAN
Tematy:
działania pozorne
apparent actions
Opis:
Wypowiedź ta zwraca uwagę, że w reformach systemu edukacji obserwuje się zbyt wiele działań pozornych, czemu należy się przeciwstawić.
This statement stresses that too many apparent actions can be observed in reforms of education system; we should counteract them.
Źródło:
Przyszłość. Świat-Europa-Polska; 2013, 1; 112-118
1895-0949
Pojawia się w:
Przyszłość. Świat-Europa-Polska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of various additives on the chemical composition, fermentation parameters and apparent digestibility of Virginia fanpetals silage in sheep
Autorzy:
Starczewski, M.
Purwin, C.
Borsuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/1192511.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
Virginia fanpetals
silage additive
apparent digestibility
Opis:
The aim of this study was to determine the effect of various additives (straw, grass, molasses, dried sugar beet pulp – pellets, inoculant, organic acids) on the quality and fermentation profile of Virginia fanpetals (Sida hermaphrodita L.) silage. Silage samples were assayed for the content of dry matter – DM, crude ash, crude protein – CP, water soluble carbohydrates – WSC, neutral detergent fiber – NDF, acid detergent fiber – ADF and acid detergent lignin – ADL as well as pH and the concentrations of ammonia nitrogen, lactic acid, acetic acid and butyric acid. Silage quality was evaluated according to the DLG Key. Apparent digestibility was determined in sheep, and the digestibility coefficients of DM, CP, NDF, organic matter – OM and digestible OM were calculated. The tested additives increased DM, decreased ADL content (P≤0.01), and reduced WSC utilization (P≤0.05, P≤0.01) in silages. Only sugar beet pulp decreased the content of NDF and ADF (P≤0.01). All silages had similar pH values (4.01 - 4.10). The analyzed silages were characterized by intense lactic acid fermentation, which was inhibited only by the grass additive (P≤0.01). All additives suppressed acetic acid fermentation (P≤0.05, P≤0.01). Grass and sugar beet pulp significantly decreased the concentration of butyric acid (P≤0.01). The addition of grass decreased CP digestibility (from 92.1% in the control silage to 89.3%), whereas the addition of a bacterial inoculant (P≤0.01) and a blend of organic acids (P≤0.05) increased CP digestibility to 93.8% and 92.8%, respectively. The addition of grass and sugar beet pulp increased the coefficient of NDF digestibility by 6 percentage points relative to 60.9% in the control silage. The addition of the inoculant and organic acids decreased NDF digestibility to 56.0% and 50.5%, respectively. Dried sugar beet pulp was the most effective additive, which positively affected the chemical composition, fermentation profile and apparent digestibility of Sida silage.
Źródło:
Journal of Elementology; 2020, 25, 4; 1499-1508
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Na pomoc pomocy
The Concept of Aid
Autorzy:
Filek, Janina
Powiązania:
https://bibliotekanauki.pl/articles/469008.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Filozofii i Socjologii PAN
Tematy:
aid
real aid
apparent aid actiy
Opis:
The author analyzes aid as it is perceived nowadays. I argue that, as a result of many factors, there has been an overflow of meanings of aid and thus not everything that is commonly regarded as aid is, in fact, aid in its essential meaning. I distinguish between aid activities and apparent aid activities and indicate that, at the same time, aid elements determine that a given action becomes aid. The distinction between real aid and an apparent aid activity is important due to the fact that granting aid is a constitutive element of human nature.
Źródło:
Prakseologia; 2012, 153; 359-378
0079-4872
Pojawia się w:
Prakseologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Contribution of diffusion weighted MRI to the differential diagnosis of renal masses
Autorzy:
Kış, Naciye
Gülden Düzkalır, Hanife
Oğuzhan Ağaçlı, Mehmet
Erok, Berrin
Gamze Kılıçoğlu, Zeynep
Powiązania:
https://bibliotekanauki.pl/articles/2049180.pdf
Data publikacji:
2022-03-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
apparent diffusion coefficient
diffusion weighted imaging
renal neoplasms
Opis:
Introduction and aim. We aimed to assess the usefulness of diffusion weighted imaging (DWI) and apparent diffusion coefficients (ADCs) for characterizing renal masses. Material and methods. In this retrospective study we measured the ADC values of renal masses at b=0, b=500 and b=1000. Measurements were made by placing a circular region of interest with a diameter of 1 cm. ADC values from normal renal parenchyma were taken to define the ADC and to compare with the ADC values of the lesions. Results. A total of 72 lesions of 54 patients were included.40 of the masses were benign and 32 were malignant. The ADC values of benign lesions at both b values were significantly higher than malignant lesions. We found the lowest values in angiomyolipomas (AMLs) and oncocytomas and the highest values in Bosniac type I cysts. Similarities was found between the ADC values of some AMLs and the RCCs. In terms of statistical results, the inclusion of AMLs in the analysis did not significantly affect the difference between malignant and benign lesions. Conclusion. In our study, the ADC values of benign renal masses were higher than those of normal renal parenchyme, which is higher than those of malignant renal masses.The lowest ADC values were observed in AMLs and oncocytomas.
Źródło:
European Journal of Clinical and Experimental Medicine; 2022, 1; 44-48
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diffusion of lead ions trough the Poznan Clay (Neogene) and through glacial clay
Autorzy:
Mieszkowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/2059620.pdf
Data publikacji:
2003
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
apparent diffusion coefficient
diffusion in clays
Fick's Law
Opis:
Two main kinds of migration through clays can be distinguished: advection and diffusion. The main force for advective flow is the water pressure gradient, while ionic concentration gradients drive diffusion. In compacted clays the hydraulic permeability is very low, therefore the diffusion process predominates. Clays can be considered as waste repositories. This paper shows characteristics of the diffusion process and the application of this process to modelling of waste migration in clays. Additionally, a new calculation method for the apparent diffusion coefficient using the finite-difference method is given. Experimental, values of the apparent diffusion coefficient Dapp for Poznan Clay and glacial clay are respectively 2.2_2.6 _ 10-12 m2/s and 2.6_4.4 _ 10-12 m2/s.
Źródło:
Geological Quarterly; 2003, 47, 1; 111-118
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of measuring process properties on phosphate rock slurry rheology based on Brookfield method
Autorzy:
Chen, Aoao
Zhang, Qin
Powiązania:
https://bibliotekanauki.pl/articles/2175436.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
phosphate rock
grinding
concentration
rheological properties
apparent viscosity
Opis:
This research aims to explore how the flotation process conditions influence the rheological properties of phosphate rock slurry. The apparent viscosity of phosphate rock slurry was measured by Brookfield DVNext rheometer. Different mineral types, grinding time, slurry mass concentration and reagent systems were adopted to study the viscosity behavior of phosphate rock slurry. The results showed that under the same conditions, the apparent viscosity of apatite and dolomite slurry was basically the same, and the apparent viscosity of the slurry after mixing the two minerals was basically the same as that of single mineral. For the same slurry concentration, the mineral particle size had a significant effect on the rheological behavior of the slurry, and its apparent viscosity increased exponentially with the decrease of particle size. In addition, phosphate rock slurry showed shear thickening fluids characteristics when the slurry concentration is 20%-40%, but changed to pseudoplastic fluid at high concentration (60%). Sulfuric acid as pH regulator and inhibitor had little effect on the rheology of slurry; when GJBW and NaOL were added as collectors, the rheology of slurry changed, and the effect of GJBW was more obvious.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 6; art. no. 156202
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Różnorodność zachowań reologicznych wodnych roztworów wybranych hydrokoloidów spożywczych podczas mieszania długotrwałego
Rheological behavior diversity during long-lasting mixing of water solutions of selected food-type hydrocolloids
Autorzy:
Kabziński, M.
Ptaszek, P.
Ptaszek, A.
Grzesik, M.
Powiązania:
https://bibliotekanauki.pl/articles/2073219.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
mieszanie
hydrokoloidy
lepkość pozorna
mixing
hydrocolloids
apparent viscosity
Opis:
Przedstawiono właściwości reologiczne roztworów wybranych hydrokoloidów spożywczych poddawanych ścinaniu w warunkach mieszania długotrwałego. Roztwory karboksymetylocelulozy, gumy ksantanowej oraz karagenu mieszano w czasie pięciu godzin w warunkach wzrastających obrotów mieszadła. W eksperymencie zastosowano mieszadła: kotwicowe, ramowe i wstęgowe. Lepkość pozorną obliczono korzystając z zasad reometrii mieszadłowej. Wyniki badań potwierdziły odmienność zachowań teologicznych omawianych hydrokoloidów mieszanych przy użyciu mieszadeł o różnej geometrii oraz pozwoliły na określenie warunków występowania zmian lepkości pozornej w funkcji czasu.
Differences in rheological behavior between solutions of selected food-type hydrocolloids undergoing long-lasting shear mixing are presented. Solutions of carboxymethylcellulose, xanthan gum and carrageenan were subjected to mixing for five hours under conditions of increasing stirrer rotational frequency. The anchor, frame and ribbon stirrers were applied in experiments. Apparent viscosity was calculated using the principles of mixer rheometry. The results confirmed differences in rheological behavior of hydrocolloids mixed using mixers of different geometry and allowed to define conditions of changes of apparent viscosity as a function of time.
Źródło:
Inżynieria i Aparatura Chemiczna; 2016, 5; 182--185
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diffusion weighted imaging in differentiation of the clear cell RCC from the major non-clear cell RCC subtypes
Autorzy:
Kış, Naciye
Erok, Berrin
Powiązania:
https://bibliotekanauki.pl/articles/2040173.pdf
Data publikacji:
2021-09-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
apparent diffusion coefficient
diffusion weighted imaging
renal cell carcinoma
Opis:
Introduction. Renal cell carcinoma (RCC) is the most common malignant renal tumor in adults accounting for 80-90% of primary malignant adult renal neoplasms. RCC represents a very heterogenous groups of tumors with a number of distinct histological varieties, of which the major 3 subtypes are clear cell RCC (70-80%), papillary RCC (13-20%), and chromophobe RCC (5%). Imaging features are varied from solid and relatively homogenous appearance to markedly heterogenous appearance with cystic changes, hemorrhage and necrosis. The use of diffusion weighted imaging (DWI) for RCC subtyping and also for differentiation of high grade and low grade tumors has been showed to be useful in many studies in the literature. Aim. In this study, we aimed to determine the comparative contribution of DWI in differentiation of the clear cell RCC from the major non-clear cell RCC subtypes at standard high b-value (1000 s/mm2) versus low b-value (500 s/mm2). In addition, we also aimed to assess the diagnostic performance of DWI for differentiating high grade clear cell RCC from low grade clear cell RCC based on Fuhrman grades in our patients. Material and methods. 62 cases with a prediagnosis of RCC according to MRI findings including DWI sequence with histological verification and subtyping of renal cortical tumor following a total or partial nephrectomy were included in the study. Results. Among 62 cases, 46 were male and 16 were female, with mean age of 59.5±15.7. Pathological diagnoses of 62 cases were as follows, clear cell RCC, (44) papillary cell RCC (14) and chromophobe cell RCC (4). They were divided into two groups as clear cell RCC group (44 cases) and non-clear cell RCC group (18 cases). There was no statistically significant difference between the mean ADC values of clear cell and non-clear cell groups at b-value of 1000 s/mm2 (p>0.05). However, the mean ADC level for clear cell RCC group at b-value of 500 s/mm2 were significantly higher than for non-clear cell RCC group (p<0.05). When a value of 0.99x10-3 mm2/s was set as cut-off for ADC at b-factor of 500 s/mm2, differentiation was achieved with a high sensitivity (91%) and specificity (56%). Regarding the diagnostic performance of DWI for differentiating high from low Fuhrman grades clear cell RCCs, there was no statistically significant difference between the ADC values of Grade I-II clear cell RCC cases and Grade III-IV clear cell RCC cases at b-factor of 1000 s/mm2 (p>0.05). However, ADC values for grade III-IV group was statistically significantly lower than ADC values for Grade I-II group at b-factor of 500 s/mm2 level. Conclusion. ADC measurements at moderate b-value of 500 s/mm2 were more sensitive in subtyping and grading of RCC cases. This technique can be used in clinical practice as a fast and additional sequence in abdominal MRI.
Źródło:
European Journal of Clinical and Experimental Medicine; 2021, 3; 215-220
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Definition of Apparent Power
Autorzy:
Canturk, S.
Balci, M. E.
Hocaoglu, M. H.
Powiązania:
https://bibliotekanauki.pl/articles/262701.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
apparent power
power factor
uunbalanced and non-sinusoidal conditions
Opis:
In this paper, the widely recognised apparent power definitions, which are Arithmetic, Vector, IEEE standard, DIN standard apparent power definitions and the apparent power definition of Mayordomo and Usaola, are rigorously reviewed, and their abilities on the measurement of the system’s power transfer efficiency are analysed by using a specially derived apparent power, which is calculated in terms of the total line losses of the system with and without the reactive power compensation. In the analyses, two major compensation strategies, namely the minimum line loss (MLL) and sinusoidal and balanced current (SBC) compensation strategies, are considered to determine the total line loss of the system with the compensation. Therefore, in a representative nonsinusoidal and unbalanced test system, the results are simulated by taking into account unbalance among the resistances of neutral and phase lines. The simulated results show that under nonsinusoidal and unbalanced conditions, the unbalance among the resistances of neutral and phase lines highly affects the system’s power transfer efficiency. Additionally, Mayordomo and Usaola’s apparent power definition can be used for proper measurement of the power transfer efficiency in the nonsinusoidal and unbalanced systems. On the other hand, the accuracies of the rest of the reviewed definitions considerably depends on unbalance among the resistances of neutral and phase lines. It should also be mentioned that the accuracies of the apparent power definitions are considerably not affected by the type of compensation strategy.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2015, 18, 2; 1-9
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Apparent Activities in Special Education. A Critical Analysis of Core Curriculum
Autorzy:
Jabłoński, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/938897.pdf
Data publikacji:
2019-12-15
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Apparent actions
violence
intellectual disability
social competences
civic competences
Opis:
The topic discussed herein concerns a particular deconstruction of the core curriculum in primary special schools carried out by means of a critical analysis of this document. On the grounds of this analysis, the article shows the consequences of apparent actions that are taking place in special schools, which in consequence lead to violence, perpetuating negative stereotypes and stigmatisation of students with intellectual disabilities.
Źródło:
Interdyscyplinarne Konteksty Pedagogiki Specjalnej; 2019, 26; 103-124
2300-391X
Pojawia się w:
Interdyscyplinarne Konteksty Pedagogiki Specjalnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of physical and physico-chemical factors on pulp rheology of smithsonite
Autorzy:
Shang, Yanbo
Sun, Chuanyao
Powiązania:
https://bibliotekanauki.pl/articles/10933093.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
smithsonite
pulp rheology
apparent viscosity
yield stress
particle agglomerate
Opis:
Pulp rheology is an important factor affecting flotation. The effects of particle size (150-74 μm, 74-38 μm, 38-23 μm, -23 μm), pulp density (11.76%-34.78%), pH (5.3-12.4), collector concentration (25-500 mg/dm3), and stirring intensity (400-900 rpm) on the rheology of smithsonite, kaolinite, quartz, and calcite minerals were investigated in detail. Additionally, the agglomerate morphology of particles was observed by a polarizing microscope. The results showed that as the mineral particle size decreased and pulp density increased, the apparent viscosity and yield stress of the pulp increased. Especially the fine mineral particles (-23 μm) presented a higher apparent viscosity and yield stress. The order of apparent viscosity and yield stress for the minerals from large to small was: kaolinite>calcite>smithsonite>quartz under different pH values, the collector concentrations, and stirring intensities. In the presence of collector of octadecylamine, smithsonite, kaolinite, and calcite particles could form aggregates, especially smithsonite particles presented obvious agglomeration with large particle size and compact network structure. The agglomeration effect of calcite and kaolinite particles were weaker than that of smithsonite. The particle agglomeration resulted in the increase of the apparent viscosity and yield stress of the pulp. Quartz particles did not form clusters, hence the pulp’s apparent viscosity and yield stress were the lowest. The research on the changes in rheological properties of the pulp will hopefully provide some guidance for future flotation.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 1; art. no. 157244
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geoelectric method applied in correlation between physical characteristics and electrical properties of the soil
Autorzy:
Filho, A. M. S.
Silva, C. L. B.
Oliveira, M. A. A.
Pires, T. G.
Alves, A. J.
Calixto, W. P.
Narciso, M. G.
Powiązania:
https://bibliotekanauki.pl/articles/136150.pdf
Data publikacji:
2017
Wydawca:
EEEIC International Barbara Leonowicz Szabłowska
Tematy:
geoelectrical prospecting
apparent
electrical resistivity
soil compaction
moisture content
Opis:
This paper presents the study of the relationship between electrical properties and physical characteristics of the soil. Measures of apparent electrical resistivity of the soil were made for different types of soil, varying moisture content gradually while maintaining a constant compaction, and then varying the compaction and relating it to a constant humidity. Development of a correlation surface is proposed in order to identify granulometry of the soil from moisture and compaction measurements. For the study of spatial variability, two areas were chosen to allow the change of moisture content and compaction in order to verify the measurement capacity of apparent electrical resistivity of the soil as methodology to identify change in soil dynamics. Results obtained show correlations among apparent electrical resistivity of the soil, moisture, soil compaction and clay content.
Źródło:
Transactions on Environment and Electrical Engineering; 2017, 2, 2; 37-44
2450-5730
Pojawia się w:
Transactions on Environment and Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of hindered amine light stabilizers on the resistance of polypropylene towards ionizing radiation
Autorzy:
Przybytniak, G.
Mirkowski, K.
Rafalski, A.
Nowicki, A.
Legocka, I.
Zimek, Z.
Powiązania:
https://bibliotekanauki.pl/articles/148686.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
polypropylene
stabilizers
HALS
electron beam
apparent viscosity
nucleation agent
Opis:
The influence of hindered amine light stabilizers (HALSs) on physical and mechanical properties of irradiated and non-irradiated isotactic polypropylene (PP) was studied. The stabilizers under investigation were: Tinuvin 765 (T765) and Tinuvin 622 (T622) - derivatives of 1,2,2,6,6-pentamethyl piperidine and Chimassorb 944 (C944) - a derivative of 2,2,6,6-tetramethyl piperidine. It was found that the stabilizers reduce the amount of peroxyl radicals in the amorphous phase of PP. The irradiation with electron beam causes a drop of apparent viscosity both in the original and in the modified PP however the effect is smaller in the presence of HALSs. Admixture of T622 and T765 stabilizers increases the crystallization temperature of non-irradiated PP by about 8 10°C (measured by DSC) what results from the facilitated formation of a large number small microcrystals. It was concluded that HALSs initiate two opposite tendencies - chemical protection against damage initiated by free radicals and, simultaneously, physical enhancement of sensitivity towards irradiation by the increase of nucleation density. In the studied systems, the presence of maleic anhydride does not improve compatibility between the polymeric matrix and HALSs.
Źródło:
Nukleonika; 2005, 50, 4; 153-159
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rheological properties of chitosan blends with partially hydrolyzed polyacrylamide in different solvents
Autorzy:
Lewandowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1035377.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
apparent shear viscosity
chitosan
polyacrylamide
polymer blends
rheological properties.
Opis:
In the present paper, the results of rheological measurements in solutions of chitosan (Ch) with partially hydrolyzed polyacrylamide (HPAM) are presented. Aqueous acetic acid, lactic acid and aqueous acetic acid/NaCl were used as solvents for chitosan, HPAM and Ch/HPAM solution blends. The criterion of miscibility of solution blends, based on the additivity rule of apparent shear viscosity (ηa) has been discussed. The rheological parameters from power law (Ostwald de Waele model) and activation energy of viscous flow (Ea) have been calculated from the flow curves and Arrhenius plots, respectively. It was found that studied polymer solutions exhibited the non-Newtonian behaviour with shear-thinning and/or shear-thickening areas. The final result depends on the thermodynamic goodness of the solvent and on the blend composition.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2012, 17; 53-62
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 107

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