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    Wyświetlanie 1-42 z 42
    Tytuł:
    Effects of Pulse Duration on Structure and Surface Characteristics of Micro-Arc Oxidation Coatings Formed on Aluminum Alloy
    Autorzy:
    Yilmaz, M.
    Şahin, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1186801.pdf
    Data publikacji:
    2016-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Bx
    81.15.-z
    81.16.Pr
    Opis:
    Micro arc oxidation (MAO) of aluminum alloy samples was studied using bipolar pulses with various pulse durations under constant duty cycle. The processing times were chosen as 20, 30 and 40 minutes. The X-ray diffraction (XRD) technique, scanning electron microscope (SEM), surface roughness measurement (R_a) and indentation tests were employed to investigate the phase distribution, microstructure, surface properties and hardness of the coatings, respectively. By increasing the pulse duration and processing time, coatings with different surface roughness, thickness and hardness were fabricated.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 4; 673-676
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seed characteristics of Flueggea anatolica, an endangered forest shrub species
    Autorzy:
    Yilmaz, M.
    Ok, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/41408.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Opis:
    The Kadıncık shrub (Flueggea anatolica) is one of the endemic forest shrub species in Turkey. In this study, the morphological and physiological characteristics of F. anatolica seeds from three provenances (Tarsus, Kozan, Andırın) were investigated. The average 1000-seed weight was 4.9 g. There were significant differences between seeds from the different provenances in terms of their morphological characteristics, with the seeds from the Kozan provenance having the smallest seeds in terms of weight, thickness, and width. The seeds germinated at similarly high rates (90 ± 2%) at 16°C, 20°C, 24°C, and 28°C. However, the germinations occurred earlier at 24°C and 28°C, with 24°C appearing to be the most appropriate germination temperature. The results indicated that F. anatolica seeds have physiological dormancy, requiring approximately 10 weeks of prechilling for dormancy removal and germination. A 4-week warm-incubation period at 24°C prior to the prechilling treatment had only a slight effect on the prechilling duration time required to remove dormancy. Seeds stored in the refrigerator (+4°C) with a 2.7% or 4.0% moisture content conserved their high initial germination rates after one year of storage. The average germination rate of the prechilled seeds redried to an 8% moisture content and stored for one year at 4°C dropped from 92.7% to 63.6%. Basing on the results of this study, the suggested moisture content and storage temperature for storing F. anatolica seeds are 3–8% and 4°C or less, respectively.
    Źródło:
    Dendrobiology; 2015, 74
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Maturation of Oriental beechnuts (Fagus orientalis)
    Autorzy:
    Yilmaz, M
    Dirik, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/41227.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Oriental beech
    Fagus orientalis
    beechnut
    maturation
    seed
    tree
    Opis:
    In this study, both the morphological maturation and germination ability of the Oriental beechnut were investigated two months prior to seed dispersal to find out the appropriate period of ripened beechnut collection. Beechnuts were collected in the seed stand, Dokurcun-Adapazari, on August 21, September 9, and September 25 on trees, and on October 16, 2003, from the ground after the major seed fall. Germination percentages were 18.0%, 80.5%, 92.0%, and 94.7% on August 21, September 9, September 25, and October 16, respectively. Similarly, both beechnut weight and the embryo:beechnut weight ratio significantly increased with time and reached an approximate maximum level at September 25, 2–3 weeks prior to seed dispersal. This outcome indicates that ripened beechnuts can be collected from the trees, 15–20 days prior to major seed dispersal. The study also indicates that ripened Oriental beechnuts have physiological dormancy and need about 8–10 weeks chilling at 3°C for germination.
    Źródło:
    Dendrobiology; 2008, 60; 57-62
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of temperature on the germination of Fraxinus ornus subsp. cilicica seeds
    Autorzy:
    Yilmaz, M.
    Tonguc, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/41585.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Opis:
    The present study was carried out to determine the effect of temperature on the seed germination of Fraxinus ornus subsp. cilicica, an endemic taxa on Taurus Mountains in Southern Turkey. Seeds from the three provenances were collected and prechilled for 16 weeks before the germination tests. Germination tests were conducted at constant temperatures (5, 15, 20, 25°C) and at alternating temperatures (5~15, 5~20, 5~25, 15~25°C). Temperature treatments were effective on germination percentage and mean germination time. The highest and the lowest germinability were obtained at the 5–15°C (73.3%) alternating and 25°C (9.8%) constant temperatures, respectively. Mean germination time greatly differed at various temperature regimes. Germination accelerated with increased constant temperatures while it was relatively similar speed at alternating temperatures used in the tests. Seed sources had also an effect on the final germination percentage.
    Źródło:
    Dendrobiology; 2013, 69
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Professional self-concept and job satisfaction among nurses in psychiatric clinics
    Autorzy:
    Küçük Yüceyurt, N.
    Yılmaz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1918922.pdf
    Data publikacji:
    2020-06-10
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    Nurse
    psychiatry
    psychiatric nursing
    professional self
    job satisfaction
    Opis:
    Background: Nurses’ professional self and job satisfaction directly affect their professional practices. For this reason, it is important to find out about their perceptions of their professional self, the factors that affect and are affected by the professional self, and nurses’ job satisfaction. Purpose: The aim of this study was to determine the relationship between the professional self-concept and job satisfaction of nurses working in psychiatry clinics. Material and Methods: The universe of this descriptive and correlational study was the psychiatric nurses in Turkey and its sample comprised of 103 nurses employed in the psychiatry clinics and polyclinics of university hospitals randomly selected from provinces representing the seven geographical regions in Turkey. The data collection tools used in the study were Information Form, Professional Self Concept Scale and Nursing Job Satisfaction Scale in Nurses. Results: Psychiatric nurses have a high professional self-concept and moderate job satisfaction. There is a statistically significant positive correlation between the professional self-concept and job satisfaction of nurses. Conclusion: Professional self-concepts and job satisfaction of psychiatric nurses are affected by demographic characteristics and these two variables are related to each other.
    Źródło:
    Progress in Health Sciences; 2020, 10(1); 52-60
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seed characteristics of Amygdalus arabica in Adıyaman region of Turkey
    Autorzy:
    Yilmaz, M.
    Kalkan, M.
    Demirbağ, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078191.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    mountain almond tree
    hot-arid areas
    seed germination
    prechilling
    dormancy
    Opis:
    Mountain almond (Amygdalus arabica) is a shrub with naturally distributing in Turkey, Iran, Iraq, Syria, Jordan and Saudi Arabia. A. arabica also known as bitter almond and can reach up to 2.5 m. The natural distribution of mountain almond is generally in the Southeast Region of Turkey. The present study carried out to determine the morphological and physiological characteristics of the seed of mountain almond. The seeds were collected from three different populations of A. arabica in Adıyaman. For different each populations seed weight, height, width, thickness, and 1000-seed weight were measured in the laboratory. Morphological characteristics of A. arabica seeds varied according to their populations. Seed germination tests were conducted at 20 °C, after prechilling for 0, 3, 6, and 9 weeks at 4 °C. Prechilling treatments of 3 weeks were insufficient, but 6 and 9 weeks of prechilling were found to eliminate seed dormancy and led to the highest germination percentage. The average germination percentage after 0, 3, 6, and 9 weeks of prechilling were 3.1%, 49.6%, 80.4%, and 81.1%, respectively. The average mean germination time was approximately between 8 and 10 days.
    Źródło:
    Dendrobiology; 2020, 84; 49-57
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tribological Response of Heat Treated AISI 52100 Steels Against Steel and Ceramic Counterparts
    Autorzy:
    Türedi, E.
    Yilmaz, M.
    Senol, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/382223.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wear resistant alloys
    heat treatment
    bearing steel
    tribology
    microscopy
    stopy odporne na zużycie
    obróbka cieplna
    stal łożyskowa
    trybologia
    mikroskopia
    Opis:
    AISI 52100 bearing steels are commonly used in applications requiring high hardness and abrasion resistance. The bearing steels are working under dynamic loads in service conditions and their toughness properties become important. In order to provide the desired mechanical properties, various heat treatments (austenizing, quenching and tempering) are usually applied. In this study, AISI 52100 bearing steel samples were austenized at 900°C for ½ h and water quenched to room temperature. Then tempering was carried out at 795°C, 400°C and 200°C for ½ h. In order to investigate the effect of heat treatment conditions on wear behavior, dry friction tests were performed according to ASTM G99-05 Standard with a ‘ball-on-disk’ type tribometer. The samples were tested against steel and ceramic counterparts using the parameters of 100 m distance and 30 N load and 0.063 m/s rotational speed. After wear test, the surface characterization was carried out using microscopy. Wear loss values were calculated using a novel optical method on both flat and counterpart specimens.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 222-228
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Opinions of nephrology nurses about death concept
    Autorzy:
    Dönmez, Ç.F.
    Yılmaz, M.
    Helvacı, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1917338.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    death concept
    Nursing
    nephrology nurses
    opinion
    Death
    Opis:
    Introduction: Dialysis patient had experienced the fear of pain and suffering, loneliness and fear of death. The high mortality rate in these patients indicates that about one-fourth of them are in their last year of life, suggesting the presence of death and dying in the haemodialysis unit. Nephrology nurses play an important role in these patients and their families in dealing with the fear of death and accepting the reality of death. Purpose: To determine the opinions of nephrology nurses about death concept.Materials and methods: This was a descriptive study conducted among nurses. A total of 68 nurses working on the hemodialysis units of public hospitals in Turkey completed the questionnaire. The tool used in the study was the Scale of Thorson-Powell Death Anxiety, the Scale of Death Related Depression and the Scale of Attitude Towards Death and Dying Patient. The results were analyzed statistically and p<0.05 was accepted as statistically significant. Results: Nephrology nurses had a medium-level avoidant attitude towards dying patient and their emotional state was depressive. They experienced medium-level death anxiety, the death related anxiety and depression and avoidant attitude towards the patient were found more in female nurses compared to male nurses. The nurses who worked for 1-10 years have less DRDS scores than nurses who worked for 20 years or above. İn addition nurses had an avoidant attitude towards dying patients as their DRDS and TPDAS scores increased. Conclusions: It can be suggested that nephrology nurses should be given training on how to take care of dying patients, and the continuity of this in-service training should be ensured.
    Źródło:
    Progress in Health Sciences; 2015, 5, 1; 63-68
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving the Surface Properties of Cp-Ti by Pulsed Electro-Spark Deposition
    Autorzy:
    Yılmaz, M.
    Atar, E.
    Şahin, O.
    Kayalı, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1293045.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.47.De
    61.82.Bg
    Opis:
    Al-Ti intermetallic compounds were coated by electro-spark deposition. Commercially pure titanium (Cp-Ti) (grade 2) and aluminum rods were used as substrate and electrode materials, respectively. During the electro-spark deposition experiments the following pulse parameters in a group were used: pulse current amplitude, pulse duration and pause between the pulses of a pulse group with 100-300-500 A, 50-100 μs, and 100 μs, respectively. Al-Ti coatings having a thickness range of 15-30 μm were formed on the surface of titanium substrate using electro-spark deposition process. The coating properties such as the roughness and the thickness increased with increasing pulse duration and pulse current amplitude. The mass transfer coefficient decreased with increasing pulse current amplitude and pulse duration. The quality of the adhesion characters of the coatings, determined by Rockwell-C adhesion test, becomes worse from HF-2 to HF-4, due to increase of pulse current amplitude. Depending on the electro-spark deposition process parameters, the coating formed as AlTi or as layered structure consisting of AlTi+$AlTi_3$ when pulse current amplitude increases. The Al-Ti coatings include some micro cracks lying throughout the coating from surface to interface which is nature of this process. The maximum cross-sectional hardness of the coatings were in the range of 800-1150 HV.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 593-596
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication of Bioactive Coatings on Steel Substrates by Electro-Spark Deposition (ESD) and Micro-Arc Oxidation (MAO) Methods
    Autorzy:
    Yilmaz, M.
    Çakir, A.
    Ribalko, A.
    Korkmaz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193025.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.15.-z
    81.05.Bx
    81.05.-t
    81.16.Pr
    Opis:
    In the present study, first Ti6Al4V alloy was deposited on steel (AISI 1060) surfaces by using ESD method. The optimum electrical parameters for the coating process were investigated to obtain high quality coatings. Then, in order to gain bio-compatibility and obtain second layer, which was coated with hydroxyapatite (HAp), MAO technique was applied on the present coating. Resulting duplex layers were characterized with X-ray diffraction (XRD) and scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX) analysis together with surface roughness, coating thickness, scratch tests and hardness tests.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 1277-1281
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study on Modification of Micro-Alloy Steel Surfaces with Different Hard Materials Via Electro-Spark Deposition Method
    Autorzy:
    Çakir, A.
    Yilmaz, M.
    Ribalko, A.
    Korkmaz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401438.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Bx
    82.45.Fk
    81.65.Lp
    Opis:
    In this study, micro alloy steel (St 35) surfaces, which were coated with different hard alloy electrode materials via Electro Spark Deposition (ESD) method, have been characterized. The electrode materials were chosen among hard alloys such as; TiCN(Ni), CrC-NiCr, WC(Co) and TiWC(Co). During the ESD experiments, the following pulse parameters in a group were used: pulse current amplitude, pulse duration, electrical charge of 100-200 A, 100 μs, 1000 mC respectively. The surface roughness, thickness of coatings, cross sectional microstructure analysis, phase analysis, micro hardness and adhesion properties of the coated samples were characterized by profilometer, SEM (EDX), XRD, micro hardness tester and scratch adhesion tester respectively.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 1410-1413
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Freezing in Halide Salts
    Autorzy:
    Akdere, Ű.
    Yilmaz, M.
    Kavanoz, H.
    Taşseven, Ç.
    Powiązania:
    https://bibliotekanauki.pl/articles/1812355.pdf
    Data publikacji:
    2008-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.20.-p
    64.70.D-
    Opis:
    The static criterion that the amplitude of the principal peak of the liquid structure factor has a constant value along the freezing line and the onset of freezing are studied from the structure factors and the static dielectric functions of halide salts interacting via the effective pair potentials through the hypernetted-chain approximation. It is observed that the criterion above is restricted to the effective charge difference. The critical value of plasma parameter at freezing is affected by the mobility and number concentration of anions and cations. The distribution of the value of the static dielectric function closest to the wave number axis in the negative region is also determined by the charge difference and the ordering of ions and related to the onset of freezing.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 6; 1659-1670
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of heavy metals and antibiotics on siderophores producing bacterial isolates
    Autorzy:
    Erdem, B.
    Dayangaç, A.
    Günaydin, M.
    Tulumoğlu, Ş.
    Yilmaz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1068246.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.85.J-
    92.20.jb
    95.75.Fg
    Opis:
    In this study, siderophore-producing bacterial species have been isolated from soils contaminated with diesel oil. In P. aeruginosa (P-7) production of siderophores was inhibited at concentrations of ZnSO₄ and CoCl₂ of 2000 μM, while B. subtilis (BS-1) has increased siderophores production at similar concentrations of CoCl₂ and ZnSO₄. The same bacteria have increased the production of siderophores in presence of streptomycine (512 mg/ml). In B. subtilis the production of siderophores was inhibited by cefuroxime. The results show the effect of metals on the efficiency of siderophore production by bacteria for potential application in bioremediation of metal-contaminated iron-deficient soils in the microbial assisted phytoremediation processes. The results include the effect of metals on siderophore production efficiency of the bacteria used for the bioremediation of metal-contaminated soils. In conclusion, it has been found that heavy metals and antibiotics significantly effect the production of siderophores by bacteria.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 181-183
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electrical Characterization of Interdigitated Humidity Sensors Based on CNT Modified Calixarene Molecules
    Autorzy:
    Özbek, C.
    Culcular, E.
    Okur, S.
    Yılmaz, M.
    Kurt, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400035.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    66.30.je
    65.40.gp
    65.40.gk
    65.40.gd
    64.70.fm
    64.10.+h
    51.10.+y
    Opis:
    In this study, we report on the optimization and characterization of chloroform soluble calix[4]arene derivative as a humidity sensor based on electrical properties. Due to the fact that calix[4]arene molecules are nonconductive, we modified the calix[4]arene molecules with carbon nanotubes with electrostatic bond in order to increase the conductance of calix[4]arene molecule (5,11,17,23-tetra-ter-butyl-25,27-dehydrazinamidcarbonilmetoxy-26,28-dehydroxy-kalix[4]aren). Using photolithography technique, we fabricated interdigitated gold electrodes with 3 micrometers separation to investigate the electrical properties of carbon nanotubes modified calix[4]arene molecule where we used dropcast method to form a thin film of carbon nanotubes modified calix[4]arene molecule on the gold electrodes. Our reproducible experimental results indicated that the chloroform soluble carbon nanotubes modified calix[4]arene films have great potential for humidity sensing applications at room temperature operations.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 461-463
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gas Sensing Properties of Carbon Nanotubes Modified with Calixarene Molecules Measured by QCM Techniques
    Autorzy:
    Mermer, Ö.
    Okur, S.
    Sümer, F.
    Özbek, C.
    Sayın, S.
    Yılmaz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1491414.pdf
    Data publikacji:
    2012-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    66.30.je
    65.40.gp
    65.40.gk
    65.40.gd
    64.70.fm
    64.10.+h
    51.10.+y
    Opis:
    This study focuses on the characterization and optimization of calixarene modified carbon nanotube thin films for gas detection. Calixarene molecules were synthesized individually by considering their functional groups to attract the gas. Calixarene modified carbon nanotube based sensors were fabricated using drop-casting method on a quartz crystal microbalance gold electrode. Carbon monoxide, carbondioxide, oxygen and dry air were used as active gases for adsorption process, while high-purity nitrogen gas was used for desorption process. The selectivity and sensitivity of calixarene modified carbon nanotube are investigated in detail. Our experimental results show that functional calixarene modified carbon nanotube coated quartz crystal microbalance sensors are very sensitive and selective to gas of $CO_2$ at room temperature operation.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 1; 240-242
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Glocal leadership behaviors of managers working in private institutions
    Glokalne zachowania menadżerów pracujacych w prywatnych instytucjach
    Autorzy:
    Ercetin, S. S.
    Potas, N.
    Acikalin, S. N.
    Yilmaz, M.
    Kisa, N.
    Gungor, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/404684.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    global
    local
    glocal
    glocal leadership
    globalne
    lokalne
    glokalne
    glokalne przywództwo
    Opis:
    Glocalization is a holistic approach that balances global and local dimensions. As it affects organizations, glocal leadership has started to be discussed. The aim of this study is to reveal the perceptions of managers of private institutions about fulfilling glocal leadership behaviors, and investigate if there is a meaningful difference in terms of gender, age, seniority, and education level variables. This study is designed to be descriptive research using the Multidimensional Glocal Leadership Scale developed by Ercetin et. al (2011) to collect the data. The population of the research is a self-existing sample of 378 managers who work in private institutions. According to the findings, managers perceive they are fulfilling the glocal leadership behavior and its dimensions at middle level. There are some differences found for gender, age, seniority and education level variables.
    Glokalizacja jest holistycznym podejściem, które równoważy wymiary globalne i lokalne. Ponieważ dotyka organizacji, zaczęto dyskutować o glokalnym przywództwie. Celem tego badania jest ujawnienie poglądów menedżerów prywatnych instytucji na temat glokalnych zachowań przywódczych i zbadanie, czy istnieje istotna różnica pod względem płci, wieku, stażu pracy i poziomu wykształcenia. Badanie to ma charakter opisowy i wykorzystuje Wielowymiarową Skalę Przywództwa Glokalnego opracowaną przez Ercetina (2011). Populacja badania jest samodzielną próbą 378 menedżerów pracujących w instytucjach prywatnych. Zgodnie z ustaleniami, menedżerowie dostrzegają, że realizują glokalne zachowanie przywódcze i jego wymiary na poziomie średnim. Istnieją pewne różnice dotyczące zmiennych pod względem płci, wieku, stażu pracy i poziomu wykształcenia.
    Źródło:
    Polish Journal of Management Studies; 2017, 16, 2; 74-87
    2081-7452
    Pojawia się w:
    Polish Journal of Management Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Marble Dust for Soil Stabilization
    Autorzy:
    Yilmaz, F.
    Yurdakul, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031496.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    89.20.Kk
    94.05.59
    89.60.-k
    89.60.Ec
    Opis:
    Usage of marble dust was investigated for soil stabilization in the scope of utilization of waste material. Geotechnical properties, such as compaction, Atterberg limits, unconfined compressive strength of the mixtures and changes of these properties with the marble dust ratio were determined. From the test results it is seen that marble dust increases the mechanical properties of soil and application of dust wastes for soil stabilization will be an efficient practice in terms of solid waste management.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 710-711
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Yarn Properties of Modified Yarn Spinning Systems with Air Nozzle Attachment
    Badanie właściwości przędz otrzymanych w zmodyfikowanych systemach przędących z użyciem dyszy powietrznej
    Autorzy:
    Yilmaz, D.
    Usal, M. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/949457.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    yarn
    hairiness
    air nozzle
    swirling airflow
    tenacity
    irregularity
    przędza
    owłosienie
    dysza powietrzna
    wirujący strumień powietrza
    wytrwałość
    nieprawidłowość
    Opis:
    In the present study, conventional ring and compact spinning systems were modified with the air nozzle placed below the drafting system of the spinning frames. The modification of the conventional ring spinning system was called ‘Jetring’, while the combination of air nozzle and compact spinning system was named ‘Compact-Jet’. Actually, in literature there is not this kind of system ,and thus the Compact-Jet spinning system is a new application in the spinning field. When the properties of ring, Jetring, compact and Compact-jet yarns were compared, it was determined that modified spinning systems contribute to an effective reduction in the number of long hair length groups as well as insignificant changes in twist and tensile properties. The reduction in s3 yarn hairiness values reaches up to 40% in the Jetring spinning system. However, the Compact-jet spinning system improves the hairiness of conventional ring spun yarns by over 50%. A relatively higher reduction in yarn hairiness is possible with proper changes in the nozzle geometry and air pressure level. Nevertheless, in comparison to the Jetring spinning system, the Compact-jet spinning system is very effective regarding yarn properties, particularly yarn hairiness. The system even increases the yarn tenacity slightly.
    Systemy przędące tradycyjny obrączkowy i kompaktowy zmodyfikowano umieszczając dyszę powietrzną poniżej strefy rozciągania przędzarki. Modyfikację konwencjonalnego obrączkowego systemu przędącego nazwano „Jetring”, podczas gdy połączenie dyszy powietrznej z kompaktowym system przędzenia nazwano „Compact-Jet”. Stwierdzono, że zastosowanie zmodyfikowanego systemu doprowadziło do poprawy jakości otrzymywanej przędzy, wpływając zarówno na włochatość, skręt jak i wytrzymałość. Wykazano, że w zależności od zastosowanej modyfikacji można uzyskać znaczne polepszenie jakości przędzy.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2013, 2 (98); 43-50
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Leaching of mersin/aydincik dolomite ore in hydrochloric acid. Dissolution rates
    Autorzy:
    Altiner, M.
    Yildirim, M.
    Yilmaz, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/110873.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    dolomite leaching
    CO2 storage
    fractional life method
    Opis:
    In this paper dissolution of dolomite ore, collected from Mersin/Aydincik in Turkey, was investigated under various experimental conditions in the presence of HCl acid. Particle size, acid/dolomite ratio, solid/liquid ratio, stirring speed, reaction time and temperature were also conducted to the determin the optimum experimental conditions. During the experiment, CO2 amount released from the dolomite was measured through the experimental apparatus to determine reaction orders and rate constants of the sample at the different temperatures by using the fractional life approach method. It was found that, reaction orders and rate constants, based on temperatures, changed from 1.505 to 1.339 and between 3.17 and 10.49 10–2 mol dm–3 sec–1 respectively. In addition, differences in reaction rate constants were examined with the Arrhenius equation and activation energy of the dissolution process was calculated as 16.69 kJ mol–1, which was consistent with the activation energies determined in literature.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2016, 52, 2; 536-550
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of heat insulation performance of hollow clay bricks filled with perlite
    Autorzy:
    Arıcı, M.
    Yılmaz, B.
    Karabay, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1068608.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    88.05.Sv
    44.10.+i
    44.25.+f
    44.40.+a
    Opis:
    In this study, the possibility of enhancing heat insulation performance of hollow bricks by filling the cavities with perlite is investigated. A conjugate heat transfer by conduction, convection and radiation in different hollow bricks are analyzed numerically to assess their thermal performance. Calculations are performed for three scenarios for each type of hollow brick: (i) cavities are filled with air, (ii) half of the cavities are filled with perlite while the other half is filled with air, (iii) all cavities are filled with perlite. The benefit of filling cavities with perlite is justified quantitatively for each investigated hollow brick type. It is concluded that the enhancement in insulation performance can be up to 15.6% and 27.5% for half-perlite and full-perlite cases, respectively, depending on the brick type.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 266-268
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    One-dimensional consolidation parameters of cemented paste backfills
    Parametry jednowymiarowej konsolidacji podsadzki w postaci cementowej pasty
    Autorzy:
    Yilmaz, E.
    Belem, T.
    Benzaazoua, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/216918.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    odpady
    szlamy
    współczynnik konsolidacji
    indeks kompresji
    zawartość spoiwa
    okres utwardzania
    tailings
    coefficient of consolidation
    compression index
    binder content
    curing age
    Opis:
    Each year, mine and mill operations generate enormous amounts of two waste types - fine-grained tailings and coarse-grained waste rocks. Fine-grained tailings are either discharged in slurry form to surface tailings dams or delivered in cementitious form to underground mine stopes as backfilling, while coarse-grained rocks are typically stored by depositing as a dry material in large dumps. The engineering design of surface tailings dams or underground mine stopes is often controlled by the high compressibility and low shear strength characteristics of fine-grained tailings. Cemented paste backfill CPB indicating saturated, fine-grained backfills can undergo major consolidation settlement during early curing stages. Thus, a better understanding of the rate and magnitude of both differential and total settlement of CPB cured under stress is essential for a proper backfill geotechnical design. The consolidation parameters of CPB can be determined from an improved lab setup called CUAPS (curing under applied pressure system). This setup is capable of simulating the CPB placement and curing conditions, and measuring the consolidation parameters of CPB cured under effective stresses ranging between 0.5 and 400 kPa. In this study, a series of one-dimensional consolidation tests were conducted on CPB samples allowing for examination of the effects of binder type and rate as well as curing time on the compression properties (e.g., coefficient of consolidation cv, compression index Cc, and recompression index Cr) and the final geotechnical index properties (e.g., void ratio ef, water content wf, and degree of saturation Sf). Results showed that as the binder content increases, the initial resistance to consolidation increases. The cv value decreases over the course of time due to evolution of the CPB microstructure generated by the hydration process.
    W procesach pozyskania i przeróbki węgla powstają duże ilości odpadów dwóch rodzajów: drobnoziarniste odpady (muły) i gruboziarniste - odpady skały płonnej. Odpady drobnoziarniste (muły) są odprowadzane jako zawiesina na stawy osadowe lub kierowane są do wypełnienia zrobów w podziemiach kopalń, natomiast odpady gruboziarniste zazwyczaj są składowane w postaci suchego materiału na hałdach. Składowiska tych odpadów, zarówno powierzchniowe jak i podziemne, wymagają częstych kontroli ze względu na dużą kompresję (ściśliwość) oraz płynięcie (ścinanie). Drobnoziarniste odpady nasycone cementem CPB (Cement Paste Backfill) mogą we wczesnych stadiach utwardzania ulegać konsolidacji w procesie osiadania w zrobach. Aby przygotować odpowiednią mieszaninę do wypełnienia zrobów konieczna jest dobra znajomość całkowitej wielkości i różnic w osiadaniu CPB utwardzanych w warunkach ciśnienia. Parametry konsolidacji CPB mogą być badane w warunkach laboratoryjnych z wykorzystaniem ulepszonego zestawu aparaturowego o nazwie CUAPS (Curing Under Applied Pressure System) - utwardzanie pod ciśnieniem. Taka konfiguracja jest w stanie symulować warunki utwardzania CPB, a więc pomiar parametrów konsolidacji przy efektywnych naprężeniach w zakresie od 0,5 do 400 kPa. W tym przypadku, seria jednowymiarowych prób konsolidacji prowadzona była na próbkach PCB, umożliwiających zbadanie wpływu rodzaju spoiwa i czasu utwardzania na właściwości kompresji (np. współczynnik konsolidacji Cv, wskaźnik kompresji Cc i wskaźnik dekompresji Cr) oraz końcowe właściwości geotechniczne (np. wskaźnik porowatości ef, zawartość wody wf i stopień nasycenia Sf). Wyniki pokazują, że ze wzrostem zawartości spoiwa, wzrasta odporność na konsolidację. Wartość współczynnika konsolidacji cv maleje w miarę upływu czasu w wyniku zmiany mikrostruktury CPB wywołanej hydratacją.
    Źródło:
    Gospodarka Surowcami Mineralnymi; 2012, 28, 4; 29-45
    0860-0953
    Pojawia się w:
    Gospodarka Surowcami Mineralnymi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of physico-chemical and mechanical characteristics of consolidated and unconsolidated cemented paste backfills
    Badania fizykochemiczne i mechaniczne właściwości skonsolidowanych i nieskonsolidowanych zawiesin nasyconych cementem
    Autorzy:
    Yilmaz, E.
    Belem, T.
    Benzaazoua, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/217109.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    odpady do podsadzki
    woda w zrobach
    indeks geologiczny
    efektywne ciśnienie
    siła
    tailings backfill
    drainage water
    geological index parameter
    effective stress
    strength
    Opis:
    W ostatnich latach obserwuje się, że wydajność i jakość próbek zawiesin nasyconych cementem (CPB – Cement Paste Backfill) in situ są stale niższe niż tych samych próbek przygotowanych w plastikowych formach w laboratorium. Może to wynikać z braku w laboratorium skutecznego narzędzia mogącego naśladować zawiesiny in situ, warunki ich utwardzania jak również rozmiary i geometrię próbek. W celu wypełnienia tej luki, w laboratorium opracowano nowe narzędzie o nazwie CUAPS (Curing Under Applied Pressure System), wytworzone i wykorzystane do zbadania wpływu ciśnienia na podstawie skutecznego nacisku na właściwości fizykochemiczne i mechaniczne CPB, jak również próbek otrzymanych z plastikowych form. Badania porównawcze przeprowadzono zarówno dla próbek CUAPS jak i próbek otrzymanych w laboratorium, zawierających lepiszcza (cementu) 3,45 i 7% wag. po 7, 14 i 28 dniach utwardzania. Wyniki wskazują, że wydajność próbek konsolidowanych CUAPS są zawsze bardziej prawdziwe (realistyczne) niż próbek otrzymanych w laboratorium, głównie z powodu odprowadzania wody w wyniku konsolidacji. Ostatecznie metoda CUAPS powoduje korzystny wpływ na utwardzenie CPB dzięki zawartości wody (separacja wody od świeżej zawiesiny odpadów z cementu) i połączeniu części wody zasobowej z zawiesiną w zrobach.
    In recent years, it has been observed that the performance and quality of in situ cemented paste backfill (CPB) samples are constantly lower than samples obtained from the same CPB mix poured into laboratory-prepared plastic moulds. This could be well explained by the absence of an efficient laboratory tool capable of mimicking CPB’s in situ placement, hardening, and curing conditions relating to stope size and geometry. To meet this need, a new laboratory tool named CUAPS (curing under applied pressure system) was manufactured and used to examine the effect of curing under effective stress on physico-chemical and mechanical properties of CPB, along with plastic mould samples. A comparative study was conducted for both CUAPS and mould samples containing a binder content of 3, 4.5, and 7 wt% after curing times of 7, 14, and 28 days. Results indicate that the performance of CUAPS-consolidated samples are always more realistic than those of plastic mould-unconsolidated samples mainly due to water drainage induced by consolidation. CUAPS has witnessed an advantageous effect on CPB hardening which includes the amount of bleeding water (separation of water from the fresh backfill material) and a combination of drainage of part of the mixing water and the settlement of paste backfill after its placement in the cap.
    Źródło:
    Gospodarka Surowcami Mineralnymi; 2013, 29, 1; 81-100
    0860-0953
    Pojawia się w:
    Gospodarka Surowcami Mineralnymi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical Properties and Melt Quality Relationship of Sr-modified Al-12Si Alloy
    Autorzy:
    Uludağ, M.
    Uyaner, M.
    Yilmaz, F.
    Dişpinar, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/380647.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminum alloy
    silicon alloy
    modification
    quality of casting
    bifilm index
    porosity
    stop aluminium
    stop krzemowy
    jakość odlewu
    porowatość
    Opis:
    The formation of oxide film on the surface of aluminium melts, i.e. bifilms, are known to be detrimental when they are incorporated into the cast part. These defects causes premature fractures under stress, or aid porosity formation. In this work, Al-12 Si alloy was used to cast a step mould under two conditions: as-received and degassed. In addition, 10 ppi filters were used in the mould in order to prevent bifilm intrusion into the cast part. Reduced pressure test samples were collected for bifilm index measurements. Samples were machined into standard bars for tensile testing. It was found that there was a good agreement with the bifilm index and mechanical properties.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4; 134-140
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    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:
    Biomechanical comparison of straight DCP and helical plates for fixation of transverse and oblique bone fractures
    Autorzy:
    Aksakal, B.
    Gurger, M.
    Say, Y.
    Yilmaz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/307129.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    unieruchomienie
    biomechanika
    kości
    Straight DC Plate
    helical plate
    biomechanics
    fixation
    bone fractures
    Opis:
    Purpose: Biomechanical comparison of straight DCP and helical plates for fixation of transversal and oblique tibial bone fractures were analyzed and compared to each other by axial compression, bending and torsion tests. Method: An in vitro osteosynthesis of transverse (TF) and oblique bone fracture (OF) fixations have been analysed on fresh sheep tibias by using the DCP and helical compression plates (HP). Results: Statistically significant differences were found for both DCP and helical plate fixations under axial compression, bending and torsional loads. The strength of fixation systems were in favor of DC plating with exception of the TF-HP fixation group under compression loads and torsional moments. The transvers fracture (TF) stability was found to be higher than that found in oblique fracture (OF) fixed by helical plates (HP). However, under torsional testing, compared to conventional plating, the helical plate fixations provided a higher torsional resistance and strength. The maximum stiffness at axial compression loading and maximum torsional strength was achieved at torsional testing for the TF-HP fixations. Conclusion: From in vitro biomechanical analysis, fracture type and plate fixation system groups showed different responses under different loadings. Consequently, current biomechanical analyses may encourage the usage of helical HP fixations in near future during clinical practice for transverse bone fractures.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2014, 16, 4; 67-74
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Boride Layer Growth Kinetics of AISI H13 Steel Borided with Nano-Sized Powders
    Autorzy:
    Karakaş, M. S.
    Günen, A.
    Kanca, E.
    Yilmaz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/351842.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    boriding
    growth kinetics
    activation energy
    Opis:
    Growth kinetics of boride layers in AISI H13 steel was investigated using the pack boriding method at temperatures of 1073, 1173 and 1273 K (800°C, 900°C and 1000°C) for periods of 2, 4 and 6 h with nano-sized boron (NB) and micron-sized Ekabor II powders as boriding agents. The total thickness of the boride layer (including both FeB and Fe2B) after boriding at 1273 K (1000°C) for 6 h was 103.8 μm and 96.5 μm for the NB and Ekabor II specimens, respectively. X-ray diffraction analysis of the boride layers on the surfaces borided with NB and Ekabor II revealed the presence of FeB and Fe2B phases with sawtooth morphology. The FeB/Fe2B volume ratio was higher in the specimens borided with NB. The thickness of the boride layer (FeB + Fe2B) increased with the increasing boriding temperature and time. The FeB layer in the NB specimen displayed a (002) preferred orientation.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 1; 159-165
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Selected Properties of Eco-Friendly Soybean and Other Fibres
    Porównanie wybranych właściwości ekologicznych włókien sojowych
    Autorzy:
    Yilmaz, D
    Karaboyaci, M
    Kiliç, H
    Kitapçi, K
    Yelkovan, S
    Powiązania:
    https://bibliotekanauki.pl/articles/232900.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    soybean fibre
    regenerated fibre
    dyeing properties
    biodegradable fibre
    sustainable products
    functional properties
    flame resistance
    błonnik sojowy
    regenerowane włókno
    właściwości barwienia
    biodegradowalne włókna
    zrównoważone produkty
    właściwości funkcjonalne
    ognioodporność
    Opis:
    Biodegradable and sustainable products are being employed to make contributions to efforts concerning environmental protection and the reduction of oil consumption. Biodegradable fibres present a simple and notable opportunity for providing sustainable textiles. Soybean fibre is a kind of regenerated and new-generation protein plant fibre. The present work aimed to analyse the many different properties of soybean fibres. Particularly it was focused on their performance, functional, comfort and dyeing properties. In literature, there are studies regarding soybean fibres but topics mostly involved the analysis of comfort properties of the fibre. In this study, fibre structure and composition, flame and UV resistance, strength, pilling behaviour, air and water vapour permeability, water absorption, drape and dyeing properties were studied. It was indicated that soybean fibre is capable of meeting the performance, comfort and functional requirements of classical and technical textile products. The fibre has many of the good qualities of natural fibres such as tenacity, moisture regain, soft-lustrous handle, dyeability and colour fastness properties, and also has some of the functional properties of synthetic fibres such as being flame retardant and anti-ultraviolet.
    Produkty biodegradowalne i odnawialne są coraz powszechniej stosowane dla ochrony środowiska naturalnego i redukcji zużycia paliw. Takim problemem są włókna naturalne w tym sojowe, będące przykładem nowej generacji włókien proteinowych. W pracy przedstawiono analizę rożnych właściwości, w szczególności ich zastosowania, funkcjonalności komfortu użytkowania i wybarwialności. W literaturze znajduje się wiele publikacji związanych z komfortem produktów z włókien sojowych, natomiast w przedstawionych badaniach zwrócono uwagę na ich strukturę i skład a, także ich palność, odporność na promieniowanie UV, wytrzymałość, piling, przepuszczalność powietrza i pary wodnej, absorpcje wody, układalność i wybarwialność. Stwierdzono, że włókna sojowe mają wiele ważnych pozytywnych właściwości charakterystycznych dla innych włókien naturalnych.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2015, 3 (111); 14-24
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction and classification of pressure injuries by deep learning
    Wykrywanie i klasyfikacja odleżyn z wykorzystaniem deep learning
    Autorzy:
    Yilmaz, A.
    Kızıl, H.
    Kaya, U.
    Cakır, R.
    Demiral, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047948.pdf
    Data publikacji:
    2021
    Wydawca:
    Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
    Tematy:
    deep learning
    pressure ulcers
    artificial intelligence
    nursing care
    odleżyny
    sztuczna inteligencja
    opieka pielęgniarska
    Opis:
    Pressure injuries are a serious medical problem that both negatively affects the patient's quality of life and results in significant healthcare costs. In cases where a patient doesn’t receive appropriate treatment and care, death may result. Nurses play critical roles in the prevention, care, and treatment of pressure injuries as members of the healthcare team who closely monitor the health status of the patient. Today, the use of artificial intelligence is becoming more prevalent in healthcare, as in many other areas. Artificial intelligence is a method that aims to solve complex problems by using computers to mathematically simulate the way the brain works. In this article, we compile and share information about a deep learning model developed for the detection and classification of pressure injuries. Deep learning can operate on many types of data. Convolutional Neural Networks (CNN) prefer images because they can handle 2D arrays. In this case, the images, annotated according to the National Pressure Injury Advisory Panel pressure injury classification system, have been fed into a deep learning model using CNN. The developed CNN model has a 97% success in detecting and classifying pressure injuries, and as more images are collected and fed into the CNN, the prediction accuracy will increase. This deep learning model allows for the automatic detection and classification of pressure injuries, an indicator of health outcomes, at an early stage and for quick and accurate intervention. In this context, it is expected that the quality of nursing care will increase, the prevalence of pressure injury will decrease, and the economic burden of this health problem will decrease.
    Odleżyny są problemem zdrowotnym, który negatywnie wpływa na jakość życia pacjenta i powoduje poważne koszty opieki. W przypadku braku odpowiedniego leczenia i opieki może to doprowadzić do śmierci pacjenta. Pielęgniarki odgrywają kluczową rolę w zapobieganiu, opiece i leczeniu odleżyn jako członkowie zespołu opieki zdrowotnej, którzy ściśle i stale monitorują stan zdrowia danej osoby. Obecnie w dziedzinie zdrowia, podobnie jak w wielu innych dziedzinach, coraz częściej wykorzystuje się sztuczną inteligencję. Sztuczna inteligencja jest metodą, która ma na celu rozwiązywanie złożonych problemów poprzez matematyczne symulowanie sposobu działania mózgu z wykorzystaniem komputerów. Niniejszy artykuł jest przeglądem zaprojektowanym w celu podzielenia się informacjami na temat modelu deep learning opracowanego do wykrywania i klasyfikacji odleżyn. Deep learning może działać na wielu typach danych. Konwolucyjne sieci neuronowe (ang. convolutional neural networks, CNN) preferują obrazy, ponieważ mogą obsługiwać macierze 2D. Obrazy, uporządkowane zgodnie z systemem klasyfikacji odleżyn według National Pressure Injury Advisory Panel (NPIAP), zostały przekształcone w "Deep Learning Model" z wykorzystaniem CNN. Opracowywany model CNN ma 97% skuteczności w wykrywaniu i klasyfikowaniu odleżyn, a im więcej obrazów zostanie zebranych i wykorzystanych w CNN, tym większe będzie prawdopodobieństwo trafnej prognozy. Ten model deep learning daje możliwość automatycznego wykrywania i klasyfikacji odleżyn, które są wskaźnikiem jakości zdrowia, na wczesnym etapie oraz dokładnej i szybkiej interwencji. W tym kontekście oczekuje się, że jakość opieki pielęgniarskiej wzrośnie, zmniejszy się częstość występowania odleżyn oraz obciążenie ekonomiczne związane z tym problemem zdrowotnym.
    Źródło:
    Health Problems of Civilization; 2021, 15, 4; 328-335
    2353-6942
    2354-0265
    Pojawia się w:
    Health Problems of Civilization
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of patient dose by positron emission tomography (PET) and medical internal dose (MIRD) methods
    Autorzy:
    Yilmaz, G.
    Tugrul, A.
    Demir, M.
    Yasar, D.
    Demir, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1068158.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.57.uk
    87.53.Bn
    Opis:
    Dynamic experiments cannot be observed easy on patients for determination of dosimetry in human PET studies dosimeter studies. In this study, it is aimed to estimate dose amount absorbed by some critical organs (e.g. bladder, lung, thyroid and ovary) by using a developed phantom. The phantom was improved as an original anthropomorphic whole body phantom which has been arranged with dynamic system. Therefore, organ absorbed doses by applying of fluorine-18-fluorodeoxyglucose in PET studies and was observed by using the phantom, while TLD dosimeters were used for determination of internal absorbed doses. In medical physics, the accuracy of absorbed dose resulting from radiopharmaceutical application was determined by the medical internal radiation dose method that depends theoretically on the cumulated activity of the source organs and their mass. The MIRD calculation was also used for the study and comparatively evaluated with the experimental results which were collected by using improved phantom.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 90-92
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An alternative method in fixation of tibial transverse fractures by intramedullar nailing : Biomechanical and histopathologic investigation
    Autorzy:
    Aksakal, B.
    Varis, O.
    Say, Y.
    Kom, M.
    Yilmaz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/951813.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    bone fracture
    intramedular nails
    coating
    fixation
    biomechanics
    biomechanika
    złamanie kości
    powłoka
    Opis:
    A new method was used in fixation of tibial bone fractures. Intramadular nailing (IMN) has been used into mid-diaphysis on left tibias of New Zeland rabbits (n = 5) via an in vivo work. To enable fixation of fracture, without causing too much screw damage on bone and avoiding malunion, nano- and micro-scale hydroxyapatite (HA) was coated at two ends (25 mm in length) of intramadular nails before implantation. After six weeks of survival period and sacrifizing, biomechanical tests and histopathologic examinations were executed. Such experiments have revealed that good stabilization and hence better fracture union for both treated IMN groups (NHA and MHA) over the standard IMN’. Pull-out tests showed the tensile strengths obtained to be significantly higher for the nano (NHA) and micro scale-MHA coated IMN compared to the uncoated standard IM nailing.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2013, 15, 2; 81-90
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of nut shell addition on the permeability of a crushed gold ore
    Autorzy:
    Yilmaz, S.
    Sirkeci, A. A.
    Bilen, M.
    Yigit, I.
    Kizgut, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/110544.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    permeability
    nut shells
    heap leaching
    gold leaching
    leach efficiency
    Opis:
    In this study, variations in permeability of a gold ore by nut shell addition was studied. Ore particle size, nut shell size and volume fraction in the ore were the parameters investigated. Permeability is an important issue in heap leach operations considering the processing duration. Particularly below 6 mm particle size permeability is greatly hampered. Turkey is the leading country in the world in hazelnut production. Therefore, considerable amounts of nut shell are obtained as a by-product. Incerase in the permeability of a finely crushed ore will obviously enable an increase in the leaching efficiency. The finer the particle size the more the liberation of gold is yet the permeability is lower. Therefore, this study focuses on the possibility of improving the permeability of ore heaps with nut shell addition. Optimum amount of nut shell which should be added to the ore was found to be 5% by volume. It was found that the permeability of ore crushed below 2.36 mm considerably increased by the addition of nut shell below 18 mm.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 2; 467-475
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Expression of ADAMTS-7 in myocardial dystrophy associated with white muscle disease in lambs
    Autorzy:
    Yumusak, N.
    Yigin, A.
    Polat, P.F.
    Hitit, M.
    Yilmaz, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087770.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ADAMTS-7
    myocardial dystrophy
    lamb
    white muscle disease
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 1; 119-126
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phytochemical profiles of wild grown blackberry and mulberry in Turkey
    Fitochemiczny profil dzikiej czarnej jagody i morwy w Turcji
    Autorzy:
    Akin, M.
    Eyduran, S.P.
    Ercisli, S.
    Yilmaz, I.
    Cakir, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/11543357.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    Blackberry and mulberry are main berry crops grown in Black Sea region mostly in humid shade forest areas and its important for local people’s diet and also important for the maintenance of their health and prevention of disease. Present study aimed to determine the content of vitamin C, organic acids (citric acid, tartaric acid, oxalic acid, malic acid, succinic acid, fumaric acid), sugars (glucose and fructose) and phenolic compounds (catechin, rutin, quercetin, chlorogenic acid, ferulic acid, o-coumaric acid, p-coumaric acid, caffeic acid, syringic acid, vanillic acid, and gallic acid), as well as antioxidant capacity (Trolox Equivalent Antioxi-dant Capacity, TEAC assay) in the wild grown blackberry and mulberry fruit. Among phenolic acids, chlorogenic acid was the predominant for all wild grown blackberries, white and black mulberries. The presence of oxalic acid was only detected in the wild blackberry genotype. As a result, the phytochemical recognition of the wild grown blackberry, black and white mulberries might contribute to forthcoming investigations for developing the efficiency of food industry.
    Czarna jagoda i morwa należą do głównych owoców jagodowych uprawia-nych w rejonie Morza Czarnego w wilgotnych cienistych obszarach. Są one też ważne w diecie lokalnych mieszkańców, dla utrzymania zdrowia oraz zapobiegania chorobom. Celem niniejszego badania jest określenie zawartości witaminy C, kwasów organicznych (cytrynowego, winowego, szczawiowego, jabłkowego, bursztynowego, fumarowego), cukrów (glukozy i fruktozy), związków fenolowych (katechiny, rutyny, kwercetyny, kwasów: chlorogenowego, ferulowego, o-kumarowego, p-kumarowego, kawowego, syryngowego, wanilinowego i galusowego), a także pojemności antyoksydacyjnej (pojemnośćprzeciwutleniająca wyrażona w równoważnikach, test TEAC) w owocach dziko rosnącej czarnej jagody i morwy. Dominującym kwasem wśród kwasów fenolowych dla wszystkich uprawianych czarnych jagód oraz białej i czarnej morwy był kwas chlorogenowy. Obecność kwasu szczawiowego była wykryta tylko w genotypie dzikiej czarnej jagody. Fitochemiczna analiza dziko rosnącej czarnej jagody oraz czarnej i białej morwy może zatem przyczynić się do kolejnych badań zmierzających do zwiększenia wydajności przemysłu spożywczego.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2016, 15, 1; 3-12
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Investigation on the Mass Attenuation Coefficients of W-VC-C and W-VC-TiC-C Composites for Gamma Radioisotopes
    Autorzy:
    Tuğrul, A.
    Demir, E.
    Yılmaz, O.
    Sönmez, S.
    Öveçoğlu, M.
    Büyük, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1187451.pdf
    Data publikacji:
    2016-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    25.20.Dc
    81.05.Mh
    Opis:
    In this study, tungsten-vanadium carbide-graphite and tungsten-vanadium carbide-titanium carbide-graphite composites (W-VC-TiC-C) which can be used in high-tech equipment were investigated against different gamma radioisotopes. The composite materials were produced via mechanical alloying method in two groups; one of them includes 93% tungsten (W), 6% vanadium carbide (VC) and 1% graphite (C) which was synthesized during three different alloying times (6, 12, 24 hours). Other group of the samples were composited as 91% tungsten, 6% vanadium carbide (VC), 2% titanium carbide (TiC) and 1% graphite (C) which has also three different alloying times (6, 12, 24 hours). Gamma transmission technique was used in the experiments to investigate the gamma attenuation properties of the composite materials. Linear and mass attenuation coefficients of the samples were determined in the experiments and theoretical mass attenuation coefficients were calculated using widely acknowledged XCOM computer code. The experimental mass attenuation coefficients and calculated theoretical results were compared and evaluated with each other. Results showed that gamma attenuation coefficients of the composite materials dependent on alloying time. It can be concluded that increasing the tungsten ratio causes higher linear attenuation coefficient which decreases with increasing gamma energies.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 4; 724-727
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use of high-density paste bacfill for safe disposal of copper/zinc mine tailings
    Użycie zagęszczonej podsadzki zestalanej do bezpiecznego składowania odpadów górnictwa miedzi i cynku
    Autorzy:
    Yilmaz, E.
    Belem, T.
    Benzaazoua, M.
    Kesimal, A.
    Ercikdi, B.
    Cihangir, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/216589.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    odpady przeróbcze
    podsadzanie
    środowisko
    stabilizacja
    unieszkodliwianie
    tailings
    backfills
    environmental
    stabilization
    disposal
    Opis:
    The safe environmental disposal of sulphide-rich copper/zine mine tailings is fast becoming a major economic factor in determining the profitability of mining operations. There have been new approaches and better technologies practised in the recent years which allow the mining industries to reduce and/or eliminate the environmental impacts of harmful mine tailings. One of these approaches is the use of high-density paste backfill (HDPB) which is consisting mainly of a mix of solid particles (with the cement) and water, containing between 70% and 85% by dry weight of solids. The increased use of HDPB has improved the reliability, and has reduced the cost of the preparation and transportation systems. This paper focuses on the potential environmental benefits of using the HDPB when tailings are acid generating, and also provides a case study conducted in an underground copper/zinc mine in northeast Turkey in order to illustrate these benefits.
    Bezpieczne dla środowiska składowanie zasiarczonych odpadów przeróbczych górnictwa miedzi i cynku staje się ważnym czynnikiem ekonomicznym determinującym opłacalność działalności górniczej. W ostatnich latach stosuje się nowe podejście i opracowano nowe technologie, które pozwalają zakładom górniczym redukować i eliminować szkodliwe oddziaływanie górniczych odpadów przeróbczych na środowisko. Jednym z takich rozwiązań jest użycie zagęszczonej podsadzki zestalanej (HDPB), składającej się głównie z mieszaniny cząstek stałych (i cementu) z wodą, zawierającej między 70 a 85% wagowo suchej masy. Rosnące zastosowanie podsadzki zestalanej zwiększyło niezawodność, przy jednoczesnym zmniejszeniu kosztów produkcji i systemów transportu. Artykuł przedstawia potencjalne korzyści dla środowiska płynące z użycia podsadzki zestalanej w przypadku odpadów przeróbczych powodujących zakwaszanie. Zaprezentowano również studium przypadku podziemnej kopalni miedzi i cynku w północnowschodniej Turcji, które ilustruje uzyskane efekty.
    Źródło:
    Gospodarka Surowcami Mineralnymi; 2011, 27, 3; 81-94
    0860-0953
    Pojawia się w:
    Gospodarka Surowcami Mineralnymi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biofortification and the involved modern approaches
    Autorzy:
    Athar, T.
    Khan, M.K.
    Pandey, A.
    Yilmaz, F.G.
    Hamurcu, M.
    Hakki, E.E.
    Gezgin, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/15075.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Źródło:
    Journal of Elementology; 2020, 25, 2
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Upper Campanian calciclastic turbidite sequences from the Hacımehmet area (eastern Pontides, NE Turkey): integrated biostratigraphy and microfacies analysis
    Autorzy:
    Sari, B.
    Kandemır, R.
    Özer, S.
    Walaszczyk, I.
    Görmüş, M.
    Demırcan, H.
    Yilmaz, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/138655.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Late Campanian
    Calciclastic Turbidite
    biostratigraphy
    Eastern Pontides
    kampan
    biostratygrafia
    Turcja
    Opis:
    The upper Campanian (Cretaceous) of the Hacımehmet area (south of the city of Trabzon; Eastern Pontides) is mainly composed of calciclastic turbidites. The basinal unit of the 119 m thick succession includes thin red pelagic limestone interlayers and conglomerates dominated by volcanic clasts. The overlying upper slope and lower slope units of the sequence consist of an alternation of allochthonous calcarenite/calcirudite beds and pelagic marls and mudstones. Calcarenite/calcirudite beds dominate the upper slope unit of the succession and are composed of transported material, including benthic foraminifers, red algae, bryozoan, crinoid and rudist fragments, inoceramid bivalve prisms and neritic and pelagic carbonate lithoclasts. The occurrence of Helicorbitoides boluensis (Sirel) extracted from the calcarenite/calcirudite beds indicates a Campanian age. Identifiable rudists such as Joufia reticulata Boehm, Bournonia cf. anatolica Özer, Biradiolites cf. bulgaricus Pamouktchiev and ?Biradiolites sp. from the upper slope unit of the succession indicate a late Campanian–Maastrichtian age. The planktonic foraminifers within the red pelagic limestone beds, marls and mudstones throughout the succession consist mainly of Campanian–Maastrichtian forms and suggest mainly basinal depositional conditions. The presence of Radotruncana cf. calcarata (Cushman) accompanied by Globotruncanita elevata (Brotzen) in the basinal unit of the succession indicates an early late Campanian age for the lower part of the succession. Inoceramid bivalves have been collected from the upper part of the succession. The fauna is dominated by ‘Inoceramus’ tenuilineatus Hall and Meek, 1854 and Cataceramus haldemensis (Giers, 1964); other taxa recognised are: ‘Inoceramus’ algeriensis Heinz, 1932, Platyceramus vanuxemi (Meek and Hayden, 1860), ‘Inoceramus’ cf. nebrascensis Owen, 1852, Cataceramus aff. barabini (Morton, 1834), Cataceramus gandjaensis (Aliev, 1956), and ‘Inoceramus’ sp.; the assemblage indicates the ‘Inoceramus’ tenuilineatus Zone; corresponding to the middle–late Campanian boundary interval. The uppermost part of the succession is characterized by the presence of the trace fossils Scolicia strozzii and Scolicia isp., indicating a mixed Skolithos-Cruziana ichnofacies. This ichnofacies suggests a well-oxygenated environment.
    Źródło:
    Acta Geologica Polonica; 2014, 64, 4; 393-418
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of bacterial species in milk by MALDI-TOF and assessment of some oxidant-antioxidant parameters in blood and milk from cows with different health status of the udder
    Autorzy:
    Ozbey, G.
    Cambay, Z.
    Yilmaz, S.
    Aytekin, O.
    Zigo, F.
    Ozçelik, M.
    Otlu, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/16539172.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    dairy cows
    CMT
    mastitis
    malondialdehyde
    glutathione
    MALDI-TOF
    Opis:
    This study aimed to identify bacterial pathogens in milk samples from dairy cows with subclinical and clinical mastitis as well as to assess the concentrations of oxidant-antioxidant parameters [malondialdehyde (MDA), reduced glutathione (GSH), and total GSH levels] in both blood and milk samples. From a total of 200 dairy cows in 8 farms, 800 quarter milk samples obtained from each udder were tested in the laboratory for the presence of udder pathogens. Cultivated bacteria causing intramammary infection from milk samples were identified by Matrix-Assisted Laser Desorption/Ionization-Time of Flight (MALDI-TOF). In addition, from tested animals 60 cows were selected includıng 20 healthy cows that were CMT negative, 20 cows with subclinical mastitis (SM), and 20 cows with clinical mastitis (CM) for detection of MDA, GSH, and total GSH levels in blood and milk samples. Three hundred and eighty (47.5%; 380/800), 300 (37.5%; 300/800), and 120 (15%; 120/800) of milk samples, respectively were CMT positive or SM and CM, and those positives were cows from different farms. We observed that 87.4% (332/380), 25.3% (76/300), and 34.2% (41/120) of cows with CMT positive, CMT negative, and CM had bacterial growth. The most predominantly identified bacteria were Staphylococcus chromogenes (18.7%) obtained mainly from SM and Staphylococcus aureus (16.7%) as the most frequent cause of CM. According to our results, dairy cows with CM had the highest MDA levels, the lowest GSH, and total GSH levels in both blood and milk samples however, high MDA levels and low GSH levels in milk samples with SM were observed. Based on our results, lipid oxidant MDA and antioxidant GSH could be excellent biomarkers of cow’s milk for developing inflammation of the mammary gland. In addition, there was no link between nutrition and MDA and GSH levels.
    Źródło:
    Polish Journal of Veterinary Sciences; 2022, 25, 2; 269-277
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of flunixin meglumine and meloxicam influence on postoperative and oxidative stress in ovariohysterectomized bitches
    Autorzy:
    Yilmaz, O.
    Korkmaz, M.
    Jaroszewski, J.J.
    Yazici, E.
    Ulutas, E.
    Saritas, Z.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/31619.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The aim of this study was to compare the effect of flunixin meglumine (FM) and meloxicam (M) on postoperative and oxidative stress in ovariohysterectomized bitches. Twenty four bitches were divided into three groups (n=8 in each) and treated during premedication as follows: FM (2.2 mg/kg, iv, Fluvil, Vilsan, Turkey), M (0.2 mg/kg, sc, Maxicam, Sanovel, Turkey) or 0.9% saline (1 ml, iv, IE, Turkey) - control (C) group. The concentrations of serum cortisol, nitric oxide (NO), malondialdehyde (MDA), antioxidant potential (AOP) and glutation (GSH) were measured in blood samples collected during incision (0 h), closure of incision line (0.5 h) and 1, 2.5, 12 and 24 hours after incision. It was observed that cortisol level was higher at 0.5, 1 and 2.5 h in group C (p < 0.05), 0.5 h in group FM (p < 0.001), and 1 and 2.5 h in group M (p < 0.01), as compared to that determine at 0 h. Group C showed higher cortisol level during 0.5 h (p < 0.05) than that found in the other groups. Group FM displayed lower levels during 1 h (p < 0.01) and 2.5 h (p < 0.05) as compared to those observed in other groups. Concentrations of MDA, AOP and GSH between all the groups did not show any significant differences. MDA level was higher at 0.5 and 1 h in groupM (p < 0.05) than that found in group C and it was the lowest at 2.5 h in group C (p < 0.05). AOP was higher at 2.5 h in group FM and M (p < 0.05) than that observed in group C, and at 12 and 24 h in group M than that found in group C and FM. GSH did not show any significant differences between the groups. NO level in group FM after 12 h was higher (p < 0.05) than that at 0.5, 1 and 24 h. Moreover, NO level was lower at 0.5 (p < 0.01), 1 (p < 0.05) and 24 h (p < 0.05) in group FM than that observed in group C and M. In conclusion, flunixin meglumine decreases cortisol and NO levels more efficiently than meloxicam. Therefore, it is suggested that postoperative stress following ovariohysterectomy may be prevented by flunixin meglumine in bitches.
    Źródło:
    Polish Journal of Veterinary Sciences; 2014, 17, 3
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physico-chemical and biological activity of hawthorn (Crataegus spp. L.) fruits in Turkey
    Fizykochemiczna i biologiczna aktywność owoców głogu (Crataegus spp. L.) w Turcji
    Autorzy:
    Ercisli, S.
    Yanar, M.
    Sengul, M.
    Yildiz, H.
    Topdas, E.F.
    Taskin, T.
    Zengin, Y.
    Yilmaz, K.U.
    Powiązania:
    https://bibliotekanauki.pl/articles/11543262.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    physicochemical activity
    biological activity
    hawthorn
    Crataegus
    biochemical diversity
    genotypic variation
    fruit
    fruit mass
    anthocyanin
    Turkey
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2015, 14, 1; 83-93
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of hip dysplasia on some biochemical parameters, oxidative stress factors and hematocrit levels in dogs
    Autorzy:
    Polat, E.
    Han, M.C.
    Kaya, E.
    Yilmaz, S.
    Kayapinar, S.D.
    Coskun, S.
    Yildirim, A.
    Can, U.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087150.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    alkaline phosphatase
    hematocrit
    hip dysplasia
    creatine kinase
    oxidative stress
    Źródło:
    Polish Journal of Veterinary Sciences; 2021, 24, 4; 473-478
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Urine iodine excretion in patients with papillary thyroid cancer evaluation of the relationship with the presence of BRAF mutation
    Autorzy:
    Celik, M.
    Guldiken, S.
    Ayturk, S.
    Yilmaz Bulbul, B.
    Kucukarda, A.
    Can, N.
    Tastekin, E.
    Sezer, A.
    Sut, N.
    Tugrul, A.
    Gurkan, H.
    Tozkir, H.
    Demirkan, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1192247.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    papillary thyroid cancer
    BRAF mutation
    urine iodine excretion
    Opis:
    Iodine is an essential element for the production of thyroid hormones. In recent years, it has been suggested that excessive consumption of iodine may play a role in the pathogenesis of papillary thyroid cancer (PTC). In addition, studies have suggested that high iodine consumption is an important risk factor for the formation of a BRAF mutation in the thyroid gland. A prospectively designed study included 132 cases scheduled for thyroidectomy for various reasons. Urine iodine levels of all patients were examined before the operation. The iodine excretion levels of the patients were grouped according to the median urinary iodine concentration determined in community screenings (those with <100 µg L-1 low iodine excretion, those with 100-199 µg L-1 normal iodine excretion, those with 200-299 µg L-1 high iodine excretion). Patients were divided into 3 groups according to the post-operative pathology results. As a result of thyroid histopathology, benign (n: 44), PTC (n: 88) (BRAF (+): 44 and BRAF (-): 44) cases were included in the study. BRAF mutations in patients diagnosed with PTC were evaluated using the “Real Time PCR Melting Curve Analyzer” method. The relationship between urinary iodine excretion levels and clinical, histopathological and BRAF positivity was examined. In our study, no difference was found in urinary iodine excretion between patients with and without PTC. Hashimoto’s thyroiditis was observed more frequently in patients with PTC (p=0.023). In addition, Hashimoto’s thyroiditis was statistically more frequently detected in the BRAF (-) group compared to the BRAF (+) and control group (p=0.034). Despite studies suggesting that high iodine consumption is important in PTC pathogenesis, we did not find a relationship between the mutation and iodine consumption, which plays an important role in the development of PTC.
    Źródło:
    Journal of Elementology; 2020, 25, 3; 1019-1028
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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