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Wyszukujesz frazę "Altun, M." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Rheological Behavior of Modified Starch/EVA Blends
Autorzy:
Aydin, I.
Ergin, M.
Altun, M.
Powiązania:
https://bibliotekanauki.pl/articles/1195260.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
83.85.Cg
83.50.Xa
83.80.Mc
83.80.Tc
Opis:
There is a current research tendency towards the biodegradable thermoplastic materials from renewable resources since the environmental restraints play vital role in recent years. Starch is one of the renewable resources and abundantly available in the form of plant products. It is possible to blend starch with various thermoplastic materials to achieve such aims. In this study, an ethylene-vinyl acetate (EVA) copolymer resin (Luvax 40 W, DuPont) was blended with a modified starch (Maize Starch, Pendik Nisasta) in various amounts by means of a single screw extruder with different screw speeds. For this purpose, first starch was modified in a four neck spherical glass reactor. Modified starch was then blended with the EVA copolymer resin. Rheological analyses of these composites were performed by means of an AR G2 rheometer (TA Instruments) with parallel-plate geometry in a steady state condition. Rheological behavior and properties were recorded. The changes in viscosity with different temperatures, stress and strain dependence as well as general constitutive material behavior were determined in detail. As a result, the best formulation and process conditions were determined for the reasonable processability of starch/EVA blends from the obtained rheological data.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 503-505
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of different sowing rates on the fatty oil composition of coriander grown in winter and spring in semi-arid conditions
Autorzy:
Tekin, G.K.
Hajyzadeh, M.
Altun, S.
Toncer, Ö.
Powiązania:
https://bibliotekanauki.pl/articles/53891404.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
Coriander is an annual herb, a member of the Umbelliferae/Apiaceae family, which often used in flavouring substances. The stem, root, leaves and fruits all have an aroma that most people consider to be pleasant. The objective of the study was to determine changes in the fatty oil composition of coriander sown at different seed rates (10, 20, 30, and 40 kg ha-1) and grown in winter and summer seasons. Two coriander varieties (Mardin and Denizli) were grown under semi-arid conditions. The experiment was arranged in a split-split plot design with three replications. Sowing times composed the main plots, the subplots were varieties (population) and four different seeding rates (10, 20, 30, and 40 kg ha-1) were used as sub-sub plots. The crop harvests were completed from the first half of June to the first week of July, according to the maturity of different populations. The results showed that the fatty oil ratio varied between 17.30 and 23.82%. The highest value (23.82%) was obtained from sowing 40 kg seeds per ha-1 of the Denizli ecotype in winter, while the lowest one (17.30%) was achieved from the seed rate of 10 kg ha-1 of the Mardin ecotype sown in summer. It was determined that petroselinic acid, the most important component of coriander fatty oils, was high at the seed rate of 10 kg ha-1 of the Mardin ecotype plants sown in summer. The GGE biplot analysis was made, demonstrating a negative relationship between petroselinic acid and linolenic acid, a positive relationship between linoleic and cis-13-octadecenoic acid, and a positive relationship between palmitic, myristic, and stearolica acids.
Źródło:
Journal of Elementology; 2023, 28, 2; 497-509
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydroxyapatite Synthesis from Fish Bones: Atlantic Salmon (Salmon Salar)
Autorzy:
Komur, B.
Altun, E.
Aydogdu, M.
Bilgiç, D.
Gokce, H.
Ekren, N.
Salman, S.
Inan, A.
Oktar, F.
Gunduz, O.
Powiązania:
https://bibliotekanauki.pl/articles/1032056.pdf
Data publikacji:
2017-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.85.jj
81.05.-t
Opis:
Production of the bioceramics on the market is presently conducted from typical precipitation method by using reagent grade raw chemicals or through calcination of natural sources like animal bones (especially bovine bone) and fish bones. Usually fish bones were damped near or in the water sources, which can lead to serious environmental pollution. Those were regarded as a trash, even though they still bear economic value, including conjugates. In this study bones of Atlantic Salmon (Salmo salar) were used as a bioceramic material source. Bones of Atlantic Salmon were collected from Besiktas Fish Market. Those were cleaned from possible flesh with reagent grade NaOH. Cleaned parts were washed with demineralized water very neatly. Dry fish bones were calcinated at 850°C for 4 hours. The obtained hydroxyapatite material was characterized with scanning electron microscopy and X-ray diffraction methods. It was found that the bioceramic material consisted of hydroxyapatite and various related phases. Scanning electron microscopy studies have revealed nano-structured bioceramic particles. The aim of this study is to obtain nano-structured bioceramics from bones of Atlantic Salmon in an environmentally friendly and economic way.
Źródło:
Acta Physica Polonica A; 2017, 131, 3; 400-402
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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