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    Wyświetlanie 1-10 z 10
    Tytuł:
    Non-contact Method for Measurement of Colour Variation in a Cotton Sample
    Bezkontaktowa metoda pomiaru zmiany koloru bawełny
    Autorzy:
    Vik, M.
    Khan, N.
    Yildirim, B.
    Viková, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/231891.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    cotton
    degree of reflectance
    yellowness
    HVI
    High Volume Instrument
    image analysis
    bawełna
    stopień odbicia
    żółcień
    pomiaru koloru włókien bawełnianych
    analiza obrazu zmian barwy bawełny
    Opis:
    Colour is the visual perceptual property in the cotton grade classification of Universal Cotton Standards. We undertook an experimental study on the variation in cotton colour using the Non-contact method. Rd (degree of reflectance) and +b (yellowness) are globally recognized colour parameters of cotton, which are measured by HVI (High Volume Instrument). The Non-contact method is used for the evaluation of colour variation within cotton samples. The results obtained from the Non-contact method were compared with those of other conventional methods used globally for the color measurement of cotton fibers. Additionally image analysis is interpreted with the variation in cotton colour. Results confirmed a strong co-relation between the Non-contact method and image analysis for the colour variation of cotton.
    Kolor jest właściwością służącą do klasyfikacji jakości bawełny przy zastosowaniu uniwersalnych standardów. W pracy badano zmianę koloru bawełny stosując metodę bezkontaktową, która służy do oceny zmienności barwy wewnątrz próbek bawełny. Otrzymane wyniki porównano z innymi znanymi metodami stosowanymi na całym świecie do pomiaru koloru włókien bawełnianych. Wyniki potwierdziły silną korelację pomiędzy metodą bezkontaktową a analizą obrazu zmian barwy bawełny.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2017, 2 (122); 106-111
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Activity of resveratrol on the influence of aflatoxin B1 on the testes of Sprague dawley rats
    Autorzy:
    Omur, A.D.
    Yildirim, B.
    Saglam, Y.S.
    Comakli, S.
    Ozkaraca, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087503.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aflatoxin B1
    rat
    resveratrol
    sperm
    Źródło:
    Polish Journal of Veterinary Sciences; 2019, 2; 313-320
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gamma Attenuation Properties of Some Aluminum Alloys
    Autorzy:
    Yıldırım, S.
    Tugrul, A.
    Buyuk, B.
    Demir, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1188038.pdf
    Data publikacji:
    2016-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    25.20.Dc
    Opis:
    In the present work, several commonly used aluminum alloys were investigated for their protective properties against gamma radiation. The gamma transmission technique was used to study the gamma attenuation behavior of the alloys. Cs-137 (0.662 MeV) and Co-60 (1.25 MeV) gamma radioisotope sources, which have relatively medium and high gamma energy levels, were used as gamma sources. The linear and mass attenuation coefficients of the aluminum alloys were measured. The mass attenuation coefficients of the samples were compared with the theoretical values which were calculated using XCOM computer code. The difference between the experimental and theoretical values was below 5%. In addition half-value layer (HVL) values for the studied aluminum alloys were calculated using the linear attenuation coefficients. The attenuation coefficients of the different aluminum alloys were compared. The biggest HVL was observed for 1050 alloy, for both gamma isotope sources, which means the smallest gamma attenuation capability among the studied alloys. It is concluded that the alloys were applicable for the gamma radiation shielding applications.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 4; 813-815
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effects of B₄C amount on hardness and wear behaviours of 7075-B₄C composites produced by powder metallurgy method
    Autorzy:
    Ay, H.
    Özyürek, D.
    Yıldırım, M.
    Bostan, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1155410.pdf
    Data publikacji:
    2016-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.40.Pq
    Opis:
    In this study, the effects of B₄C amount on hardness and wear behaviours of 7075 Al-B₄C composites produced by powder metallurgy method were investigated. Within the scope of work, different amount of B₄C (3, 6, 9%) added into gas atomized 7075 Al powders. The powders were mixed in Turbula with 67 rpm for 45 min. Then the composite powders were pre-shaped by cold pressing under 600 MPa pressure. Pre-shaped samples were sintered in atmosphere controlled furnace at 580°C for 4 h. Scanning electron microscope, X-ray diffraction examinations and hardness measurements were carried out after standard metallographic processes. Wear tests were performed in a pin on type wear apparatus under 30 N with 1 m s¯¹ sliding speed, at six different sliding distances (500-3000 m). Results show that the hardness was increased with increasing of amount of B₄C. At the end of wear tests the lowest weight loss were found to 9% B₄C containing composites. In addition, it is determined that the weight loss increased with increasing sliding distance.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 4; 565-568
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Antibacterial Properties of Nano $TiO_2$ and ZnO Particle Filled Polymers
    Autorzy:
    Altan, M.
    Yildirim, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1293839.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    82.35.Np
    81.07.-b
    Opis:
    Antibacterial property for the plastic products is very important due to their wide spread usage in many areas close to human health such as a child toy or a food package. There are some methods to make polymers antibacterial such as ionizing radiation but they can be still infected by micro organisms during usage of them. The best and easy way to obtain antibacterial polymers is melt mixing of polymers with antibacterial agents. In this study, nano $TiO_2$ and ZnO particles were mixed with polypropylene and high density polyethylene with a twin screw extruder. Silane was applied to the particles prior melt mixing in order to prevent agglomeration and FT-IR analysis was done to characterize the particles. After melt mixing, particle filled rectangular plates were obtained by plastic injection molding and antibacterial tests were done on the plates according to a standard method, JIS Z 2801. According to the results, satisfactory antibacterial properties were obtained for both polymers and it has been seen that particles without silane could not provide antibacterial effect.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 645-647
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Cavity Design on Stress Distribution in Second Premolar Tooth Using Finite Element Analysis
    Autorzy:
    Parlar, Z.
    Gökçek, E.
    Yildirim, K.
    Kahyaoglu, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031094.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    45.10.-b
    46.25.-y
    Opis:
    The objective of this study is, using finite element analysis, to design cavity geometry, to minimize risk of the fraction and cracking in second premolar tooth. To avoid possible tooth fracture, proper cavity geometry can be designed, to reduce the effect of masticatory forces. Premolar tooth was chosen due to its least strength in comparison to other type of teeth. In literature, there was insufficient study on using finite elements methods to investigate restorated premolar teeth. A healthy premolar tooth was scanned to obtain 3D model of it, to perform finite elements analysis. The validation was performed based on existing experimental data. According to stress distribution, three different cavity geometries were designed using composite resin and ceramic as a restoration material. It is observed that the amount of stress acting on tooth is diminishable with regard to analysis results. Hence, proper cavity geometry and material were found to minimize the risk of tooth fracture.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 949-953
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of intercropping system and nitrogen fertilization on land equivalent ratio, yield and mineral content of broccoli
    Autorzy:
    Yildirim, E.
    Cil, B.
    Ekinci, M.
    Turan, M.
    Dursun, A.
    Gunes, A.
    Kul, R.
    Kitir, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/12715459.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    To determine effects of intercropping broccoli with onion and their correspondence to different nitrogen concentrations on growth, yield and nutrient contents, field studies were conducted for two years. In intercropping plots, onion sets were planted between broccoli rows. Broccoli and onion plants were also grown as monocrops. Nitrogen (N) was applied at three different rates (160, 200 and 240 kg ha⁻¹) in both mono and intercrop plots of broccoli. The overall efficiency of intercropping was evaluated by employing land equivalent ratios (LERs). Cropping systems significantly did not affect chlorophyll reading value, yield and other parameters observed. However, nitrogen application rate had significant effect on these parameters. The highest values of these parameters were generally observed in 240 kg N ha⁻¹ application. Macro and microelement content of broccoli leaves was affected neither by cropping systems nor by nitrogen fertilization except for N, Mn, Zn and NO₃. Intercropping increased plant height but decreased the plant diameter of onion. There wasn’t significant decrease in plant weight of intercropped onion at 240 kg N ha⁻¹ treatment when compared to monocropping. Broccoli intercropped with onion at 240 kg N ha⁻¹ had the highest LER values, showing that intercropping practice could be more productive than monocropping especially in case of 240 kg N ha⁻¹ application.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 3; 101-109
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of simultaneous application of nitrogen and copper on yield and steroidal sapogenin production in Trigonella foenum graecum L.
    Autorzy:
    Shams, M.
    Haghighi, B.
    Yildirim, E.
    Rabiei, V.
    Ercisli, S.
    Masiha, S.
    Golchin, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/11855202.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    Diosgenin (a steroidal saponin of fenugreek) has long been used as a raw substance for the manufacturing of steroid drugs. In order to evaluate the nutritional effect of different nitrogen (0, 50, 100, 150 and 200 kg ha-1) and copper (0, 10, 20 and 30 kg ha-1) doses on the diosgenin content, growth and yield of fenugreek (var. Ardestan), an experiment was carried out in a factorial arrangement based on complete randomized block design. The diosgenin content in the plant was monitored by a high performance liquid chromatography. Lower doses of copper increased yield, yield component and diosgenin content, but its higher level (30 kg ha-1) had negative effects on the plant yield. The simultaneous application of nitrogen and copper ameliorate the diosgenin production, yield and yield component. The result obtained from correlation and stepwise regression analysis showed that traits such as leaf area index, pods number per plant, and dry weight have significantly direct relation to diosgenin production levels in plants, while dry weight has the highest effect on diosgenin production compared to other traits. According the results, we also can conclude that nitrogen application can decrease copper toxicity in fenugreek in the contaminated soils.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2017, 16, 3; 3-11
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of emodin and metformin on biochemical, histological and oxidative stress parameters in streptozotocin-induced diabetic rats
    Autorzy:
    Bati, B.
    Yıldırım, S.
    Celik, I.
    Kaptaner, B.
    Huyut, Z.
    Yenilmez, A.
    Bolat, I.
    Zirek, A.K.
    Demir, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/53893191.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Opis:
    Diabetes mellitus (DM) is a lifelong metabolic disease with a high mortality rate, which reduces the quality of life of many people worldwide. Metformin is a hypoglycemic drug usually used to treat type 2 diabetes. Emodin has various protective effects and is widely used in holistic medicine. The aim of this study was to investigate the effects of emodin, metformin and the emodin + metformin combination in liver and kidney tissues of rats with diabetes induced by streptozotocin (STZ). For this purpose, 5 groups: I – Group Control (CG), II – Group STZ control (SC), III – Group STZ + metformin 250 mg kg-1 (SM), IV – Group STZ + emodin 40 mg kg-1 (SE) and V – Group STZ + metformin 250 mg kg-1 + emodin 40 mg kg-1 (SME) were formed with 7 rats in each group. Liver, kidney and blood samples were taken at the end of the experiment. In the study, superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione-S-transferase (GST), glutathione reductase (GR), reduced glutathione (GSH) and malondialdehyde (MDA) levels in liver and kidney tissues were analyzed. In addition, histopathology and immunohistochemical and serum toxicity biomarkers (AST, ALT, BUN and CREA) were analyzed. According to the experimental results, there was an increase in serum biomarker values in the SC group compared to the control group (p values for AST, ALT, CREA and BUN were p=0.005, p=0.001, p=0.006, p=0.001, respectively). Some antioxidant parameter values increased in SM, SE and SME groups compared to CG and SC groups (p=0.001 for GR in liver tissue and p=0.032 for GPX in kidney tissue). Histopathologic and immunohistochemical observations also supported biochemical parameter findings. In conclusion, oxidative stress parameters in liver and kidney tissue, serum samples, histopathologic and immunologic findings suggest that metformin, emodin and the metformin + emodin combination have positive effects on nephrotoxic and hepatotoxic side effects.
    Źródło:
    Journal of Elementology; 2023, 28, 2; 319-335
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of catalase activity and antioxidant properties of soils located in the buffer zone of the Roztocze National Park depending on their use
    Ocena aktywności katalazy i właściwości antyoksydacyjnych gleb położonych na terenie otuliny Roztoczańskiego Parku Narodowego w zależności od ich użytkowania
    Autorzy:
    Skwaryło-Bednarz, B.
    Jamiołkowska, A.
    Yildirim, I.
    Krzepiłko, A.
    Kopacki, M.
    Patkowska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/29433265.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Źródło:
    Agronomy Science; 2023, 78, 2; 5-18
    2544-4476
    2544-798X
    Pojawia się w:
    Agronomy Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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