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Wyświetlanie 1-15 z 286
Tytuł:
Hydrophilic films based on starch and carboxymethyl starch
Autorzy:
Wilpiszewska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/777998.pdf
Data publikacji:
2019
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
carboxymethyl starch
hydrophilic films
polysaccharide films
starch
Opis:
The hydrophilic films based on starch and carboxymethyl starch (CMS) were obtained using cast method. The effect of CMS content on the physicochemical properties of prepared films were evaluated. With increasing content of starch derivative the moisture absorption, solubility in water as well as swelling ratio increased. The highest values of mechanical parameters (tensile strength and Young’s modulus) were determined for the starch/CMS film containing the lowest CMS amount, i.e. 10 wt.% (1.1 MPa, 15 MPa, respectively). For the same system the lowest moisture absorption, solubility in water as well as swelling ratio were reported. Thus, it could be concluded that for this system the highest crosslinking density has been achieved, what was confirmed by DMTA results. Such a film could potentially find application in food or agricultural industry.
Źródło:
Polish Journal of Chemical Technology; 2019, 21, 2; 26-30
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deposition of Polymer Sensor Films on SAW Surface by Electrospraying Technology
Autorzy:
Jasek, K.
Pasternak, M.
Grabka, M.
Neffe, S.
Zasada, D.
Powiązania:
https://bibliotekanauki.pl/articles/177125.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Surface Acoustic Wave
SAW
gas sensors
deposition of chemosensitive films
Nafion® films
Opis:
One of the most important problems with regard to the Surface Acoustic Wave (SAW) gas sensors technology is the deposition of chemosensitive films exhibiting desirable chemical and physical properties. The electrospraying technology seems to be a very promising method of the film deposition in this case. It allows the chemosensitive layers to be obtained out of almost any chemicals and their mixtures in a controllable way. The process gives the possibility to generate specific films with properties unattainable if other methods were to be applied. For example, it allows to deposit solutions of polymers and suspensions of solids in polymer solutions which can degrade in the process of thermal evaporation deposition. The paper describes the results of experiments with electrospraying technique in order to obtain Nafion® films. The influence of the process parameters on film sensitivity has been studied.
Źródło:
Archives of Acoustics; 2017, 42, 3; 507-513
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary studies of the influence of starch irradiation on physicochemical properties of films prepared using starch and starch-surfactant systems
Autorzy:
Cieśla, K. A.
Nowicki, A.
Buczkowski, M. J.
Powiązania:
https://bibliotekanauki.pl/articles/148406.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
starch films
starch-surfactants films
gamma irradiation
mechanical properties
barrier properties
hydrophobic
Opis:
The influence was studied of potato and wheat starch irradiation on physicochemical properties of films, prepared using either starch alone or a composition of potato starch with three surfactants: sodium laurate, sodium palmitate and cetyl-trimethyl-ammonium bromide (CTAB). The surfactants were introduced at a level of 0.038 division sign 0.075 g per 1 g of starch. This corresponds to 0.136–0.222 mmol/g, depending on the surfactant type and its amount used. Irradiations were carried out using 60Co radiation with doses of 5, 10, 20 and 30 kGy. Films were prepared with addition of glycerol (0, 20 or 30% in terms of starch mass) by means of casting from the gelatinized starch or starch-surfactant solutions. With the purpose to characterize the films, mechanical tests (using an Instron instrument) and the wetting angle measurements were performed. The effect was determined of the storage and conditioning in an atmosphere characterized by the various moisture content on the properties of films with various compositions. The results show the radiation-induced improvement of hydrophobic properties of the films prepared using potato and wheat starch, and the selected potato starch-surfactant compositions. Improvement of strength and flexibility was obtained in the case of potato starch films, while in the case of wheat starch films the increase of strength was accompanied by a decrease in flexibility. Improvement of the functional properties of potato starch films corresponds to the improvement of their structural properties, found by scanning electron microscopy (SEM). The possibilities of modification of the films properties by modification of composition and radiation treatment were discussed.
Źródło:
Nukleonika; 2010, 55, 2; 233-242
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wygnanie ocalonych. Doświadczenie emigracji pomarcowej w filmach Mariana Marzyńskiego i Leszka Leo Kantora
The exile of survivors. The experience of post-March ‘68 emigration in films of Marian Marzyński and Leszek Leo Kantor
Autorzy:
Pietrzak, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/921258.pdf
Data publikacji:
2017-08-17
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Marian Marzyński
March 1968
Leszek Leo Kantor
documentary films
emigration
autobiographical films
Opis:
Autobiographical threads occupy an important place in films of Marian Marzyński and Leszek Leo Kantor. Interesting is the convergence of life experiences common to both authors. We can indicate a lot of parallelisms in biographies of both directors. Certainly, the most important analogy is the fact that both of them survived the Holocaust as children. Common to both artists is also experience of anti-Semitic campaign of March 1968, as a result of which they were forced to emigrate from Poland. The objective of this article is to demonstrate how this personal experience of exile resonates in their work.
Źródło:
Images. The International Journal of European Film, Performing Arts and Audiovisual Communication; 2017, 20, 29; 137-147
1731-450X
Pojawia się w:
Images. The International Journal of European Film, Performing Arts and Audiovisual Communication
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Film (de)construction of national identity. The case of Serbian films from the 1990s
Autorzy:
Zvijer, Nemanja
Powiązania:
https://bibliotekanauki.pl/articles/923163.pdf
Data publikacji:
2018-12-22
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
films
nationalism
national identity
Serbia
Opis:
The article deals with the relation between films and the concept of the national identity. These issues are discussed on the example of Serbian cinema in the 1990s. Using Anthony Smith’s approach to the visual representation of national identity, the ways in which films in Serbia construct national identity is discussed. After that, several films are analyzed that critically question the concept of nationalism. This analysis demonstrates how ideology, in this particular case, nationalistic ideology, at the semantic level can be related to films, one of the most influential segments of popular culture.
Źródło:
Images. The International Journal of European Film, Performing Arts and Audiovisual Communication; 2018, 23, 32
1731-450X
Pojawia się w:
Images. The International Journal of European Film, Performing Arts and Audiovisual Communication
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiliteracies as a Landmark to Shape the 21st Century EFL Learners
Autorzy:
Sahli, Naima
Powiązania:
https://bibliotekanauki.pl/articles/1912061.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
Multiliteracy
Films
Graphic Novels
Visuals
Opis:
Today's educators should be well-aware of the world of the 21st century; a world that is characterised by a constant technological advancement, a fierce economic competition, a diversified digital village at the end of a fingertip, and unforeseen pandemics and crises. Teachers need to develop innovative methods to allow their learners to successfully cope with the requirements of the 21st century. At present, students are digitally-oriented in need of skills and competencies that empower them to smoothly understand and critically engage in dialogue with the world they live and work in. A vivid incarnation of the  principles of  multiliteracy approach is the edited book entitled Films, Graphic Novels and Visuals: Developing Multiliteracies  in Foreign Language Education- An Interdisciplinary Approach by Daniela Elsner, Sissy Helff and  Britta Viebrock.
Źródło:
New Horizons in English Studies; 2021, 6; 245-250
2543-8980
Pojawia się w:
New Horizons in English Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Ethnographical Essay: Cine Club in the Refugee Camp – the Story of a Double Empowerment
Autorzy:
Wagner, Izabela
Powiązania:
https://bibliotekanauki.pl/articles/2046457.pdf
Data publikacji:
2019-11-29
Wydawca:
Collegium Civitas
Tematy:
refugees
camp
empowerment
ethnography
films
Opis:
The article is an ethnographic essay, which is based on a long-lasting fieldwork conducted in an Italian refugee center. The first part contains basic information on the research project, as well as the presentation of the phenomenon – empowerment – which is the axis of this text. The second part has an innovative form: on the canvas of films watched with refugees, I am conducting the analysis of problems raised by participants.
Źródło:
Zoon Politikon; 2019, 10; 186-230
2543-408X
Pojawia się w:
Zoon Politikon
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Półka filmowa 2019
Film shelf 2019
Autorzy:
Tambor, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/511493.pdf
Data publikacji:
2020
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Tematy:
film
Polish films
2019
cinema
Opis:
The paper presents the most important and the most interesting Polish films of 2019. The text covers titles such as: Corpus Christi, Icarus. The Legend of Mietek Kosz, (Nie)znajomi, Mr Jones, Politics, Their Lucky Stars, Spoor, and Playing Hard. The author presents particular films from a point of view interesting for foreigners – people learning Polish as a foreign language and interested in Polish culture.
Źródło:
Postscriptum Polonistyczne; 2020, 25, 1; 285-308
1898-1593
2353-9844
Pojawia się w:
Postscriptum Polonistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polyurethane pressure-sensitive adhesives as raw materials for the manufacturing of protective films
Autorzy:
Łągiewczyk, M.
Czech, Z.
Powiązania:
https://bibliotekanauki.pl/articles/779312.pdf
Data publikacji:
2011
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
poliuretany
warstewka samoprzylepna
warstewka ochronna
adhezja
polyurethanes
self-adhesive films
protective films
peel adhesion
Opis:
The present paper relates to water-borne polyurethane pressure-sensitive adhesives (PU-PSA) systems for self-adhesive protective films, and methods of their preparation. The typical protective films are self-adhesive films with excellent removability. Their manufacture is a film conversion process using common materials developed for the packaging industry (PVC and polyolefins). The most often used carrier for the constructions of protective films is PE. Polyurethane PSA layers are characterized by constant low peel adhesion between 3 and 5 N/2,5 cm.
Źródło:
Polish Journal of Chemical Technology; 2011, 13, 1; 47-50
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption of ethanol to thin layer of acenes as a process of interconnected networks
Adsorpcja etanolu do cienkich warstw acenów jako proces wzajemnego oddziaływania sieci
Autorzy:
Kania, S.
Kuliński, J.
Powiązania:
https://bibliotekanauki.pl/articles/296658.pdf
Data publikacji:
2013
Wydawca:
Politechnika Łódzka. Wydawnictwo Politechniki Łódzkiej
Tematy:
tetracene films
p-quaterphenyl films
adsorption
interconnected network
warstwa tetracenu
p-kwaterfenyl
adsorpcja
sieć połączeń
Opis:
The activation process and the transport process for electrons in the tetracene layers and holes in the p-quaterphenyl layers is considered. Observed dependence of the conductivity on the vapor concentration of the activator molecules may suggests influence of collisions as a source of injection of charge through the surface potential barrier of adsorption. Applied model of two-body interactions in the interface of adsorption is approved on the basis of theory of area law for entanglement from exponential decay of correlations. Quantum description of adsorption of small hydrocarbon to the solid acenes involve only diagonal elements of the interaction matrix.
Badano proces aktywacji i proces transportu elektronów w warstwach tetracenu i p-kwaterfenylu. Zależność procesów przewodnictwa od chwilowej wartości stężenia par aktywatora sugeruje wzrost natężenia prądu związanego z adsorpcją jako wynik procesów dwuciałowych zderzeń z wstrzykiwaniem nośników ładunku do warstwy. Słuszność takiego modelu uzasadnia twierdzenie o powierzchniowym charakterze oddziaływań wynikającym z teorii eksponencjalnego zaniku korelacji [9]. Teoretyczna analiza procesu adsorpcji węglowodoru na powierzchni pierścieniowego acenu nie wymaga znajomości wyrazów mieszanych macierzy przejścia. Powinno to prowadzić do znacznego uproszczenia procedury obliczania parametrów modelu oddziaływań.
Źródło:
Scientific Bulletin. Physics / Technical University of Łódź; 2013, 34; 27-33
1505-1013
2449-982X
Pojawia się w:
Scientific Bulletin. Physics / Technical University of Łódź
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mössbauer study of vacuum annealed Fe100-xGax (10 less - than or equal to x less - than or equal to 35) thin films
Autorzy:
Szumiata, T.
Górka, B.
Brzózka, K.
Gawroński, M.
Gzik-Szumiata, M.
Javed, A.
Morley, N. A.
Gibbs, M. R. J.
Powiązania:
https://bibliotekanauki.pl/articles/147332.pdf
Data publikacji:
2013
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Fe-Ga
thin films
CEMS
MOKE
Opis:
This work reports results from comparative Mossbauer studies of as-deposited and annealed Fe100.xGax (10 less - than or equal to x less - than or equal to 35) high magnetostrictive thin films of constant thickness (50 plus or minus 2 nm). Films were grown on Si(100) substrates using a co-sputtering and evaporation chamber where Fe has been sputtered and Ga was evaporated. During growth of films, a magnetic field of 65 kA/m has been applied in the plane of the film. Annealed films have been obtained by heating in vacuum for 1 h at 350 centigrade without magnetic field. After annealing, the saturation field of the Fe-Ga films has been significantly reduced. By means of the 57Fe CEMS technique the contributions from several phases have been found: Fe-Ga A2 (bcc), traces of DO3 phase, a gallium-rich disordered phase and iron oxides (both geothite and magnetite). For the sample with x = 26.5 the heat treatment reduces the DO3 phase content whereas for the film with x = 16.4 the opposite tendency has been observed. Mossbauer results were compared with XRD and MOKE findings.
Źródło:
Nukleonika; 2013, 58, 1; 27-30
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural and optical properties of nanocrystalline CdS films prepared by spray pyrolysis
Autorzy:
Aljarrah, Radhyah M. S.
Aljobory, Adnan H.
Powiązania:
https://bibliotekanauki.pl/articles/1179009.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Cadmium Sulphide
CdS films
spray pyrolysis
Opis:
Cadmium Sulphide (CdS) thin films are produced using spray pyrolysis deposition technique. Films are annealed in air at 400, 500, and 600 K of 1 h. It characterized by X-Ray Diffraction (XRD), Atomic Force Microscope (AFM) and optical properties of CdS. XRD shows that these films are polycrystalline in nature with cubic and hexagonal crystalline structure. The crystallite size, microstrain, and dislocation density were measured. AFM shows that the total substrate surface is finely covered with uniformly distributed spherical shaped grains. Optical transmittance was shown that direct transition with band gap energy was decreased between 2.44 to 2.27 eV with annealing.
Źródło:
World Scientific News; 2017, 87; 175-190
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Drying of binary thin film polymeric coatings: an experimental study
Autorzy:
Katariya, J.
Arya, R.K.
Powiązania:
https://bibliotekanauki.pl/articles/778937.pdf
Data publikacji:
2012
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Binary Coatings
thin films
drying
diffusion
Opis:
Four binary polymer -solvent systems, poly(styrene)-tetrahydrofuran, poly(styrene) - p-xylene, poly(methyl methacrylate) - ethylbenzene and poly(methyl methacrylate) - tetrahydrofuran, systems have been studied. It has been observed that thicker coatings will retain a higher amount of the residual solvent as compared to thinner coatings. In the case of poly(styrene)-tetrahydrofuran coating residual solvent remaining within the coatings were 9.09% and 4.74% for the coatings of the thicknesses of 967 micron and 559 micron, respectively. Similar trends were also observed in the case of poly(methyl methacrylate)-ethylbenzene, poly(methyl methacrylate)-tetrahydrofuran, and poly(styrene)-p-xylene systems.
Źródło:
Polish Journal of Chemical Technology; 2012, 14, 4; 83-87
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Highly sensitive chitosan-based optical fluorescent sensor for gaseous methylamine detection
Autorzy:
Mironenko, Aleksandr Yu
Sergeev, Aleksandr A.
Nazirov, Aleksandr E.
Voznesenskiy, Sergey S.
Bratskaya, Svetlana Yu.
Mirochnik, Anatoliy G.
Powiązania:
https://bibliotekanauki.pl/articles/1034571.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
composites
luminescence
optical materials
thin films
Opis:
An optical fluorescent sensor based on a chitosan thin film co-doped with Eu3+ and a bromothymol blue pH indicator has been developed. Near-UV to visible (350–400 nm) excitation of the europium (III) chelate complexes with 1,3-diphenyl-1,3-propanedione exhibits a typical lanthanide emission with maximum at 618 nm. Luminescent spectra of the Eu3+ complex were found to be insensitive to the presence of methylamine gas. Therefore, bromothymol blue, a non-fluorescent pH indicator with an absorbance maximum of deprotonated form close to the Eu3+ emission band was added to the film to provide a non-fluorescent reversible response to different methylamine concentrations, which can be detected by measuring the Eu3+ emission.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2017, 22; 159-165
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of chitosan film surface structure on the contact angle
Autorzy:
Jagodzińska, Sylwia
Pałys, Beata
Wawro, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/2131497.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
cellulose
chitosan
contact angle
films
microstructure
Opis:
The aim of this study was to evaluate the influence of the surface microstructure of chitosan films on the contact angle. Films without plasticising additives made of chitosan or regenerated chitosan were selected for the tests. A sessile drop method based on the European Pharmacopoeia was used to determine the contact angle. Due to the method of film production, the contact angle measurements were made on both the top and bottom surfaces of the film. For chitosan or regenerated chitosan films, the method of preparation slightly affected the difference in wettability between the top and bottom of the films, as confirmed by scanning electron microscopy. On the other hand, the wettability of the top and bottom of cellulose films varied greatly depending on the side of the film. Both chitosan and cellulose films had a homogeneous structure. There were differences in the microstructure between the top and the bottom of the sample in the cellulose film, a factor that affected the contact angle and thus the wettability of the surface.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2021, 26; 89-100
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 286

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