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    Tytuł:
    Zinc borate production with boron mineral source: effect of process parameters on yield and hydrophobicity
    Wytwarzanie boranu cynku z surowców mineralnych boru: wpływ parametrów procesu na wydajność i hydrofobowość
    Autorzy:
    Acarali, N. B.
    Ozturk, E.
    Bardakcı, M.
    Piskin, M. B.
    Tugrul, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/951804.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    hydrophobicity
    yield
    zinc borate
    zinc carbonate
    hydrofobowość
    wydajność
    boran cynku
    węglan cynku
    Opis:
    The aim of this study was to synthesize zinc borate by using zinc carbonate, boric acid, reference zinc borate (reference ZB) as seed and to investigate effects of modifying agents and reaction parameters on hydrophobicity and yield, respectively. Different from the studies available in the literature, the effects of different modifying agents (propylene glycol (PG) (0–6%), kerosene (1–6%), oleic acid (OA) (1–6%)) with solvents (isopropyl alcohol (IPA), ethanol, methanol) added to reaction on hydrophobicity were investigated comparingly. Firstly, the effects of reaction parameters such as reaction time (1–5 h), reactant ratio (H3BO3/ZnO) (2–5), seed ratio (0–1.5%, in terms of boric acid, w/w), reaction temperature (323–393 K), cooling temperature (283–353 K) and stirring rate (400–700 rpm) on yield were investigated. Furthermore, reactions were carried out under determined reaction conditions in both magnetically and mechanically stirred systems. The product, zinc borate, was characterized by analytical methods, XRD (X-ray Diffraction), FT-IR (Fourier Transform Infrared Spectroscopy) techniques and measurement of contact angle which identified hydrophobicity was carried out. In conclusion, it was observed that zinc borate was synthesized successfully and different modifying agents with various solvents affected the hydrophobicity of zinc borate.
    Celem tego artykułu jest synteza boranu cynku przy użyciu węglanu cynku, kwasu borowego, referencyjnego boranu cynku (ZB) jako substancji aktywnej oraz badanie efektywności tego procesu modyfikowanego odczynnikami i parametrami reakcji na hydrofobowość i wydajność syntezy boranu cynku. Dotyczy to działania różnych czynników modyfikujących hydrofobowość i parametry reakcji: glikol propylenowy (PG) (0−6%, kerozyna 1−6%, kwas oleinowy (OA) 1−6% oraz rozpuszczalniki: alkohol izopropylowy (IPA), etanol i metanol. Po pierwsze, badano jak wpływają następujące parametry reakcji na uzysk boranu cynku: czas reakcji (1−5 h), wskaźnik reaktywacji (H3BO3 : ZnO), (2−5), udział zarodków krystalizacji (0−1,5%) w odniesieniu do kwasu borowego, temperatura reakcji (50−120°C), temperatura chłodzenia (10−80 °C), szybkość mieszania (400−700 obr./min). Ponadto, reakcje były przeprowadzone w określonych warunkach mieszania mechanicznego i magnetycznego. Wytwarzany boran cynku ze względu na hydrofobowość badano metodami: dyfrakcji rentgenowskiej XRD, spektroskopii FT-IR oraz pomiarami kąta zwilżania. Reasumując, stwierdzono, że boran cynku można otrzymać z powodzeniem z różnymi rozpuszczalnikami wpływającymi na jego hydrofobowość.
    Źródło:
    Gospodarka Surowcami Mineralnymi; 2015, 31, 4; 95-109
    0860-0953
    Pojawia się w:
    Gospodarka Surowcami Mineralnymi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of Cu/Ag/Eu/Hydroxyapatite Composites Produced by Wet Chemical Precipitation
    Autorzy:
    Komur, B.
    Ozturk, E.
    Ekren, N.
    Inan, A.
    Gunduz, O.
    Andronescu, E.
    Ficai, A.
    Oktar, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/1033469.pdf
    Data publikacji:
    2017-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.-t
    81.05.Mh
    87.85.J
    Opis:
    In the first part of this study hydroxyapatite was prepared synthetically through classical wet precipitation, using Ca(NO₃)₂·4H₂O (calcium nitrate tetrahydrate) as calcium source and HgN₂O4P as phosphate source. In the second part of the study HA compounds were prepared with different ratios (0.5, 1, 2, 5, 10 and 25 wt.%) of antibacterial materials like copper (Cu), silver (Ag) and europium (Eu), using the same wet precipitation method. The prepared pure HA material was utilized as the control group for comparison with Cu/Ag/Eu/HA composites. Studies of X-ray diffraction, FTIR spectroscopy, scanning electron microscopy, equipped with energy dispersive X-ray analysis were performed. The aim of this study was to investigate Cu/Ag/Eu/HA composites and the effect of metals on HA biomaterials, used as scaffold materials in bone disease treatment.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 3; 392-396
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chemical composition and antioxidant activity of foxtail lily (Eremurus spectabilis)
    Skład chemiczny i działanie przeciwutleniające pustynnika okazałego (Eremurus spectabilis)
    Autorzy:
    Tosun, M.
    Ercisli, S.
    Ozer, H.
    Turan, M.
    Polat, T.
    Ozturk, E.
    Padem, H.
    Kilicgun, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/11542331.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    Eremurus spectabilis is used as a vegetable in Turkey, especially in Eastern Anatolia region. In this study, eight E. spectabilis from different growing areas have been analyzed for its nutrition value and antioxidant properties. The results showed that there were significant differences among samples in terms of all above parameters. The mean values of the parameters investigated were 86.62–91.35% for water content, 4.78–5.15 for pH; 0.42–0.70% for acidity, and 0.61–1.11% for ash content. The antioxidant activity tests evaluated by using 2-diphenyl-1-picryhydrazyl (DPPH) free radical scavenging and β-carotene/linoleic acid assays indicated that the extracts of E. spectabilis samples had high antioxidant capacity. In the DPPH and β-carotene/linoleic acid systems, average values were 73.69 ȝg extract . ml⁻¹ and 94.56%, respectively. The average amount of total phenolics in samples was 223 mg GAE . 100 g⁻¹ FW. Protein, K, Ca, Mg, Fe and Cu contents of E. spectabilis species were found higher than in some other commonly used vegetables. The results suggest that E. spectabilis could be a valuable source of antioxidants, phenolics and minerals.
    Eremurus spectabilis używany jest w Turcji jako warzywo, zwłaszcza w regionie Wschodniej Anatolii. W niniejszej pracy przeanalizowano wartość odżywczą i właściwości przeciwutleniających ośmiu roślin E. spectabilis z różnych obszarów uprawowych. Wyniki wykazały, że pomiędzy próbkami wystąpiły znaczące różnice we wszystkich powyższych parametrach. Średnie wartości badanych parametrów wynosiły: 86,62–91,35% dla zawartości wody, 4,78–5,15 dla pH; 0,42–0,70% dla kwasowości oraz 0,61–1,11% dla zawartości popiołu. Badania właściwości przeciwutleniających z wykorzystaniem strącania oczyszczającego wolnych rodników 2-difenylo-1-pikryhydrazylem (DPPH) oraz próby z β-karotenem/kwasem linoleinowym wykazały, że wyciągi z E. spectabilis mają silne zdolności przeciwutleniające. W systemach DPPH i β-karotenowych/z kwasem linoleinowym wartości średnie wynosiły odpowiednio 73.69 ȝg wyciągu. ml⁻¹ i 94,56%. Średnia ogólna zawartość fenoli w próbkach wynosiła 223 mg GAE . 100 g⁻¹ św.m. Stwierdzono, że zawartość białka, K, Ca, Mg, Fe i Cu w roślinach gatunku E. spectabilis jest wyższa niż w innych powszechnie wykorzystywanych warzywach. Wyniki sugerują, że E. spectabilis może być cennym źródłem przeciwutleniaczy, fenoli i związków mineralnych.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2012, 11, 3; 145-153
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On nonoscillatory solutions of two dimensional nonlinear delay dynamical systems
    Autorzy:
    Ozturk, O.
    Akin, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/254865.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    time scales
    oscillation
    two-dimensional dynamical system
    Opis:
    We study the classification schemes for nonoscillatory solutions of a class of nonlinear two dimensional systems of first order delay dynamic equations on time scales. Necessary and sufficient conditions are also given in order to show the existence and nonexis-tence of such solutions and some of our results are new for the discrete case. Examples will be given to illustrate some of our results.
    Źródło:
    Opuscula Mathematica; 2016, 36, 5; 651-669
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the retention characteristics of various stud attachment systems for implant retained overdenture
    Autorzy:
    Gonuldas, F.
    Tokar, E.
    Ozturk, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/306253.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    implant
    zamocowanie
    proteza
    retencja
    overdenture
    implant-supported dental prosthesis
    denture precision attachment
    retention
    Opis:
    The purpose of the study was to analyze and compare retention characteristics of different stud attachments including a standard and two low profile attachments on two implant embedded test models. Methods: Three different stud attachment systems (Ball attachment and two different low profile stud attachments – Equator and Locator) were used in this study. Two dental implants were placed vertically into a custom-made acrylic resin block within a 22 mm distance. Strong and soft nylon inserts of each attachment system were tested using cyclic dislodgement test for 24 months simulation. Maximum forces during the test were recorded and 10 consecutive data at baseline, 1st to 24th months were analyzed. Repeated measures ANOVA and post-hoc Tukey’s test ( p 0.05) were used for statistical analysis. Results: Retentive forces of the tested attachments varied from 30.7 to 93.75 N at the baseline. The highest initial mean retention (93.75 N) was observed in Group LC (locator attachment with clear nylon inserts) and the lowest initial mean retention (30.7 N) was detected in both Group BO (ball attachment with orange nylon inserts) and Group EY (equator with yellow nylon inserts). After the 24 months simulation, locator groups illustrated more light retention than other tested attachment systems. Conclusions: All tested attachment systems showed a significant decrease in retention value at the end of the simulated period. The locator attachment had significantly higher reduction in retention values compared to other low profile stud attachment equator and ball attachment.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2018, 20, 4; 135-141
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aminoethoxyvinylglycine and foliar zinc treatments play a key role in pre-harvest drops and fruit quality attributes of 'William's Pride' apple
    Autorzy:
    Ozturk, B.
    Yıldız, K.
    Erdem, H.
    Karakaya, O.
    Ozturk, A.
    Aglar, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/12303649.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    plant cultivation
    apple tree
    William's Pride cultivar
    apple cultivar
    foliar treatment
    pre-harvest application
    zinc application
    aminoethoxyvinylglycine
    Opis:
    Productivity of plants is determined by multiple factors that directly affect one another, therefore yield variability may be high and difficult to predict. Most often, however, a lower crop yield is achieved in the notillage system than in the ploughing system. An exact field experiment was undertaken to determine the yield and chemical composition of pea seeds sown under conditions of: 1) conventional tillage – CT (shallow ploughing and harrowing after the harvest of previous crop, pre-winter ploughing in winter); 2) reduced tillage – RT (stubble cultivator after the harvest of previous crop); and 3) herbicide tillage – HT (only glyphosate after the harvest of previous crop). A cultivation unit was applied on all plots in the springtime. Pea seed yield was higher by 14.1% in the CT than in the RT system and by 50.5% than in the HT system. The CT system was increasing the plant number m–2, number of pods and seeds m–2, seed mass per plant, and 1000 seeds mass, compared to the other systems. Protein content of seeds was at a similar level in all analyzed tillage systems, but was affected by the study year. In turn, the mineral composition of seeds was determined by both tillage system and study year. The seeds harvested from CT plots contained more phosphorus and iron, those from RT plots – more calcium and zinc, whereas those from HT plots – more phytate-P, potassium, magnesium, and copper, compared to the seeds from the other plots.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 2; 147-158
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bioactive compounds and physico-mechanical attributes of fruit and stone of cherry laurel (Prunus laurocerasus) harvested at different maturity stages
    Autorzy:
    Altuntas, E.
    Ozturk, B.
    Kalyoncu, H.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/11873592.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    In the study, physico-mechanical properties [geometric mean diameter (Dg), sphericity, surface area, weight (W), bulk and fruit density, color, fruit removal force (FRF), puncture and compression force, puncture and compression deformation, friction coefficient] and biochemical attributes [pH, soluble solids content (SSC), titratable acidity (TA), vitamin C, total phenolics (TPs), total monomeric anthocyanin (TMA) and total antioxidant capacity (TAC)] of cherry laurel fruits (Prunus laurocerasus) and stones were investigated. Geometric mean diameter, surface area, fruit weight, bulk and fruit density significantly increased, but L*, a* and b* values significantly decreased with the progress of ripening. Fruit removal force decreased from 5.04 N to 3.09 N. On the other hand, W/FRF increased with the progress of harvest date. Static friction coefficient of fruits significantly increased over plywood and silicone surfaces and friction coefficients of stones increased over plywood, galvanized mild steel and silicone surfaces with the progress of harvest date. The pH, SSC, vitamin C, TPs, TMA and TAC (according to FRAP and TEAC assay) values significantly increased with the progress of ripening. It was concluded that fruit maturity stage at harvest had significant impact on physico-mechanical attributes and bioactive compounds of cherry laurel fruits.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 6; 75-84
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Leaf area – sapwood area relationship in Scots pine (Pinus sylvestris L.) under mistletoe (Viscum album ssp. austriacum) infection
    Autorzy:
    Bilgili, E.
    Coskuner, K.A.
    Ozturk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078159.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Leaf area
    sapwood area
    Scots pine
    pine mistletoe
    Opis:
    Leaf area is linearly correlated with sapwood area in trees. The linearity of this relationship can be affected by some biotic and abiotic factors. Mistletoes are hemi parasitic plants that take up water and mineral nutrients from their hosts and affect host physiological responses. There is no conclusive evidence to show the effect of pine mistletoe (Viscum album ssp. austriacum) on leaf area and sapwood area relationship in Scots pine trees (Pinus sylvestris L.) at tree level. The aim of this study is to determine and quantify the effect of pine mistletoe on the structural variation of leaf area and sapwood area relationship at tree level in Scots pine. A total of 18 mistletoe infected and 12 uninfected Scots pine trees were destructively sampled. All needles and mistletoes were completely removed from sampled trees to determine needle and mistletoe characteristics, biomass and leaf area. Sapwood areas at breast height (BH) and at crown base height (CBH) were determined from wood discs taken from BH (1.3m) and CBH. Sapwood area was delineated by benzidine staining method. Pearson correlation, t-test and regression analyses were conducted to determine the relationship between sapwood area and needle-mistletoe leaf area relationships. The results indicated that both the relationships between sapwood area and leaf area in uninfected, and sapwood area and total leaf area (needle plus mistletoe leaf only) in infected trees were linear. However, the slope of regression equation for mistletoe infected trees was considerably lower when compared to the uninfected trees. As for the variation of the sapwood area along the stem below live crown, there was a slight difference between sapwood area at BH and CBH. The study showed also that mistletoe infection led to a significant reduction in needle size (length, width, area and weight) in Scots pine trees. Significant relationships were found between the sapwood area and leaf area in this study. The results of this study may help fill the gap in the knowledge concerning the impacts of pine mistletoe on the dynamics of Scots pine trees.
    Źródło:
    Dendrobiology; 2020, 84; 1-11
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of of aminoethoxyvinylglycine (AVG) on the quality of Japanese plum (Prunus salicina Lindell cv. Fortune) fruits
    Wpływ aminotoksywinyloglicyny (AVG) na jakość owoców śliwy japońskiej (Prunus salicina Lindell cv. Fortune)
    Autorzy:
    Kucuker, E.
    Ozturk, B.
    Yildiz, K.
    Ozkan, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/11543033.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    The role of pre-harvest aminoethoxyvinylglycine (AVG) treatments on bioactive compounds, fruit ripening and quality of Japanese plum fruits (Prunus salicina Lindell cv. ‘Fortune’) were investigated in this study. Whole trees were sprayed once with an aqueous solution containing AVG (0, 100 and 200 mg L⁻¹) two weeks before the anticipated commercial harvest. Compared to control treatment, AVG applications retarded fruit ripening and peel red color formation of fortune plum fruits. Respiration rate and ethylene production in fruit were decreased by AVG applications. Respiration rate and ethylene production in control fruit were 57% and 60% higher than those in 200 mg L⁻¹ AVG-treated fruit at the last harvest date respectively. The total phenolics and total antioxidant activity were significantly reduced by AVG treatments. Antioxidant activities of fruits treated at the date with AVG were approximate 2 fold higher than those of control fruits at the last harvest date. The chlorogenic acid, caffeic acid, rutin and kaempferol contents decreased with both AVG concentrations at all harvest dates.
    Zbadano wpływ aminotoksywinyloglicyny (AVG) użytej przed zbiorem owoców śliwy japońskiej (Prunus salicina Lindell cv. ‘Fortune’) na ich składniki bioaktywne, dojrzewanie i jakość. Całe drzewa opryskano wodnym roztworem AVG (0, 100 i 200 mg l⁻¹ ) na dwa tygodnie przed spodziewanym zbiorem owoców. W porównaniu z wynikami z kombinacji kontrolnej, AVG opóźnił dojrzewanie owoców i wybarwienie ich skórki na czerwono. Preparat w stężeniu 200 mg∙l⁻¹ zastosowany w ostatni dzień zbioru spowodował także obniżenie intensywności oddychania owoców oraz wytwarzania przez nie etylenu (odpowiednio o 57 i 60% w porównaniu z owocami z kombinacji kontrolnej). Obniżyły się także całkowita zawartość fenoli i aktywność antyutleniająca. Ta ostatnia, w tym samym terminie użycia, była dwa razy wyższa niż u owoców z kombinacji kontrolnej. Zawartości kwasów chlorogenowego i kafeinowego, rutyny i kaempferolu obniżyły się przy zastosowaniu AVG w obu stężeniach i we wszystkich terminach zbioru owoców.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2015, 14, 5; 3-17
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of the quality characteristics of naturally growing hawthorn in Susehri
    Autorzy:
    Ağlar, E.
    Sümbül, A.
    Karakaya, O.
    Ozturk, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/12707027.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    The study was conducted in 2017 in the district of Sivas. In the study, 20 genotypes, which are considered to be different from each other, taking into account the fruit characteristics such as color and size and shape, were determined from the hawthorns that were naturally grown in the flora of Suşheri. At harvest time, the fruit, which would be adequate for pomological and biochemical measurements and analyzes, was harvested. According to the results of the measurements and analyzes in the study, fruit weight was found to vary between 0.68 g and 6.35 g, fruit width was between 10.52 and 29.48 mm and fruit length was between 11.40 and 20.67 mm. The highest firmness values were recorded with the genotype (G) 20 genotype, while the G4 had the lowest values in terms of the firmness values of the fruit flesh. While there are no significant differences between the pH values of the genotypes, the differences between the genotypes in terms of SSC, TA and vitamin C contents are quite significant. It has been found that there are significant differences between the genotypes in terms of total phenolic, total flavonoid and antioxidant activity. The total phenolic content ranged from 218.8 (G17) to 605.8 (G5 and G8) mg GAE kg⁻¹ f.w., while the lowest total flavonoid content was 21.58 (G 17) and the highest total flavonoid content was 67.75 (G9) mg GAE kg⁻¹ f.w. When the antioxidant activity was evaluated, the DPPH values were 1.08 (G17) – 15.43 (14) mmol TE kg⁻¹ f.w., the FRAP values were 15.43 (G16) – 47.23 (G8) mmol TE kg⁻¹ f.w. respectively.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 1; 61-70
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determining of the fruit characteristics of pistachio grafted on wild Pistacia terebinthus L. under the Central Kelkit Basin (Turkey) ecological conditions
    Autorzy:
    Ağlar, E.
    Sümbül, A.
    Karakaya, O.
    Ozturk, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/12988365.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 6; 91-99
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Impact Angle of the Particle on Solid Particle Wear Properties of Basalt Base Glass-Ceramics
    Autorzy:
    Öztürk, M.
    Günay, U.
    Ercenk, E.
    Yilmaz, Ş.
    Powiązania:
    https://bibliotekanauki.pl/articles/1033364.pdf
    Data publikacji:
    2017-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.-t
    81.40.Pq
    Opis:
    In this study, the effect of impact angle of the particles on solid particle erosive wear properties of basalt base glass-ceramics used for industrial applications was investigated. Commercial basalt glass-ceramic materials size of 20×20×3 cm was sectioned to the size of 5×5×1.2 cm. The experimental procedure was performed by using erosive wear test device with nozzle diameter of 0.78 cm. Na feldspar size of 300 μm was used as erosive media. The samples were fixed 2 cm distance from the nozzle, Na feldspar particles were sprayed by using 1.5, 3, 4 bar pressure for 20 s. The tests were repeated with 30°+45°+60°+75°+90° impact angles. The erosive wear rates were measured and the effect of particle impact angle on wear properties was determined.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 1; 171-173
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection of driver sleepiness and warning the driver in real-time using image processing and machine learning techniques
    Autorzy:
    Umut, I.
    Aki, O.
    Uçar, E.
    Öztürk, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/102474.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    driver
    sleepiness
    real time
    image processing
    machine learning
    Opis:
    The aim of this study is to design and implement a system that detect driver sleepiness and warn driver in real-time using image processing and machine learning techniques.Viola-Jones detector was used for segmenting face and eye images from the camera-acquired driver video. Left and right eye images were combined into a single image. Thus, an image was obtained in minimum dimensions containing both eyes. Features of these images were extracted by using Gabor filters. These features were used to classifying images for open and closed eyes. Five machine learning algorithms were evaluated with four volunteer’s eye image data set obtained from driving simulator. Nearest neighbor IBk algorithm has highest accuracy by 94.76% while J48 decision tree algorithm has fastest classification speed with 91.98% accuracy. J48 decision tree algorithm was recommended for real time running. PERCLOS the ratio of number of closed eyes in one minute period and CLOSDUR the duration of closed eyes were calculated. The driver is warned with the first level alarm when the PERCLOS value is 0.15 or above, and with second level alarm when it is 0.3 or above. In addition, when it is detected that the eyes remain closed for two seconds, the driver is also warned by the second level alarm regardless of the PERCLOS value. Designed and developed real-time application can able to detect driver sleepiness with 24 FPS image processing speed and 90% real time classification accuracy. Driver sleepiness were able to detect and driver was warned successfully in real time when sleepiness level of driver is achieved the defined threshold values.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 2; 95-102
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Manipulation of Exchange Coupling in Py/Co/Cr Multilayer Thin Films
    Autorzy:
    Aköz, M.
    Parlak, U.
    Şahin, Y.
    Tavşan, D.
    Tarcan, E.
    Öztürk, O.
    Tokdemir Öztürk, S.
    Erkovan, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401229.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.70.Cn
    75.50.Cc
    76.50.+g
    Opis:
    The main issue addressed in present study is exchange coupling modification between ferromagnetic layers through non-magnetic spacer layers using extra ultra-thin ferromagnetic layers (Co). In order to achieve this goal, we prepared Cr(50 Å) / Py(20 Å) / Co(5 Å) / Cr(7, 10, 13 Å) / Co(5 Å) / Py (30 Å) / Cr(50Å) / Si using magnetron sputtering at UHV conditions and characterized by Ferromagnetic Resonance (FMR) technique. As the present study results were compared to our previous study on (Py/Cr), the exchange coupling energy was increased ten times with the cobalt thin layer
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 992-994
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Combined treatments of modified atmosphere packaging with aminoethoxyvinylglycine maintained fruit quality in sweet cherry throughout cold storage and shelf life
    Autorzy:
    Guler, S.K.
    Karakaya, O.
    Karakaya, M.
    Ozturk, B.
    Aglar, E.
    Yarılgac, T.
    Gün, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/12613537.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    wild cherry
    Prunus avium
    fruit quality
    fruit firmness
    fruit colour
    fruit storage
    weight loss
    shelf life
    packaging
    modified atmosphere
    aminoethoxyvinylglycine
    phenolic compound
    total phenol content
    Opis:
    The effects of combined aminoethoxyvinylglycine (AVG) and modified atmosphere packaging (MAP) treatments on quality attributes of ‘0900 Ziraat’ sweet cherry fruit during the cold storage and shelf life were investigated in this study. Significantly lower weight loss and decay ratios were observed in all treatments throughout the cold storage period as compared to the control. A similar case was also observed referring to the shelf life. MAP treatments were found to be more effective in retarding the weight loss and decay ratio. Higher hue angle values were measured from AVG-treated fruit at harvest. Similarly, hue angle of AVG and MAP-treated fruit were also higher than for the control in all periods of cold storage and on the 7th and 21st day of shelf life. AVG-treated fruit had higher firmness values than the control at harvest. However, higher firmness values were measured from MAP-treated fruit during the cold storage and shelf life. At the end of cold storage, lower SSC and higher titratable acidity values were observed in AVG and MAP-treated fruit than in the control. AVG + MAP treatments yielded significantly higher vitamin C, total phenolics and antioxidant activity values than the control. Contrarily, the control fruit had significantly higher total monomeric anthocyanin than the other treatments. Based on current findings, it was concluded that combined AVG + MAP treatments could be used as a beneficial tool to maintain the quality of sweet cherry fruit throughout the cold storage and shelf life.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 5; 13-26
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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