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Antifeedant and toxicity effects of some plant extracts on Yponomeuta malinellus Zell. (Lep.: Yponomeutidae)

Ömer Ertürk Vedat Şekeroğlu Ahmet Koç Yavuz Kalkan
Journal of Plant Protection Research | 2004 | vol. 44 | No 3 | 165-174
Słowa kluczowe Botanical insecticides Y. malinellus Plant Extracts
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Abstrakt

The insecticidal and antifeedant activity of extracts derived from different plants of the Liguidamber orientalis Mill. (Hamamelidaceae), Tanacetum vulgare L. (Compositae), Achillea coarctata Willd. (Compositae), Buxus sempervirens L. (Buxaceae), Diospyros kaki L. (Ebenaceae), Arum italicum Mill. (Araceae), Achilea biebersteinii Willd. (Compositae), Origanum vulgare L. (Labiatae), Hypericum androsaemum L. (Hypericaceae) and Ocimum basilicum L. (Labiatae). are reported. The 70% alcohol extracts of plants were tested for toxicity against the 3–4th instar larvae of the Yponomeuta malinellus Zell. (Lepidoptera.: Yponomeutidae). Antifeedant activity of the extracts was assessed through tests conducted on the larvae of Y. malinellus by the feeding protection bioassay. In tests carried out on the larvae of Y. malinellus, L. orientalis, O. basilicum and A. coarctata extracts showed high toxicity within 48 hour LC50’s of 75, 75 and 65% respectively. The toxicity effects of the other extracts were determined as 60, 50, 50, 50, 45, 45 and 40% within the same period, respectively. No mortality was noticed in control groups. Alcohol extract from L. orientalis, T. vulgare and B. sempervirens showed high antifeedant activity (80.90, 46.12) on the larvae of Y. malinellus. In addition to both T. vulgare and L. orientalis extracts caused decrease consumption of food per 1 mg of larvae body weight decrease showed high –8.465, –0.845, mg respectively. The highest consumption (557.6 mg) was observed with alcohol extract from, D. kaki whereas the minimum one was using alcohol extract from L. orientali. The other tested extracts showed similar activity.

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Autorzy i Afiliacje

Ömer Ertürk
Vedat Şekeroğlu
Ahmet Koç Yavuz Kalkan

Virulence properties of Listeria monocytogenes isolated from meat and meat contact surfaces in a slaughterhouse

F. Tasci M. Sudagidan O. Yavuz A. Soyucok A. Aydin
Polish Journal of Veterinary Sciences | 2024 | vol. 27 | No 1 | 13-23 | DOI: 10.24425/pjvs.2024.149329
Słowa kluczowe beef meat biofilm Listeria monocytogenes PCR PFGE virulence genes
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Abstrakt

Listeria monocytogenes is a ubiquitous microorganism that is isolated from a variety of sources such as soil, water, decaying vegetation, sewage, animal feeds, silage, farm environments and food-processing environments. This study aimed to determine the prevalence, serogroups, biofilm formation, virulence factor genes, and genetic relationships of L. monocytogenes strains isolated from beef meat and meat contact surfaces obtained from a slaughterhouse in Burdur, Turkey. In this study, a total of 179 beef meat and meat contact surface samples were analyzed for the presence of L. monocytogenes by polymerase chain reaction (PCR). Out of a total of 179 beef meat and meat contact surface samples, 83 (46.37%) were found to be contaminated with L. monocytogenes, with the highest incidence (53.01%) occurring in beef meat. In the present study, most of the isolated strains belonged to serogroups IIB and IVB (lineage I). The L. monocytogenes strain also contained monoA-B, prfA, plcA, plcB, mpl, hlyA, actA, gtcA, dltA, Fri, flaA, InlA, InlC, InlJ, and iap genes. Biofilm formation was not determined in the tested samples at pH 5.5 and different temperatures (4°C, 10°C, 25°C, and 37°C). However, strong biofilm formation was observed in 6.45% (2/31) of the strains at pH 7.0 after 48 h incubation at 37°C, and in 3.22% (1/31) of the strains at pH 7.0 after 48 h incubation at 4°C and 10°C. Pulsed-field gel electrophoresis (PFGE) results showed that L. monocytogenes isolates were clonally related, and cross-contamination was present. In addition, PFGE results also revealed that AscI had more distinguishing power than the ApaI restriction enzyme. These results indicate that L. monocytogenes detected from meat and meat contact surfaces in the slaughterhouse pose a potential risk to public health.
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Bibliografia

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Autorzy i Afiliacje

F. Tasci
1
M. Sudagidan
2
O. Yavuz
2
A. Soyucok
3
A. Aydin
4
  1. Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Burdur Mehmet Akif Ersoy University, 15030, Istiklal Campus, Burdur, Turkey
  2. Scientific and Technology Application and Research Center, Burdur Mehmet Akif Ersoy University, Burdur, 15030, Istiklal Campus, Burdur, Turkey
  3. Department of Food Processing, Food Agriculture and Livestock Vocational School, Burdur Mehmet Akif Ersoy University, 15030, Istiklal Campus, Burdur, Turkey
  4. Department of Food Hygiene and Technology, Faculty of Veterinary Medicine,Istanbul University-Cerrahpasa, 34320, Avcilar, Istanbul, Turkey

Material Production and the Effect of the System on Biocompatibility in the Modified Metal Injection Method

Bünyamin Çiçek Yavuz Sun
Archives of Metallurgy and Materials | 2023 | vol. 68 | No 1 | 195-204 | DOI: 10.24425/amm.2023.141494
Słowa kluczowe Metal Injection Molding stainless steel polymer biomaterials cytotoxicity
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Abstrakt

In this study, the bio state of the alloy produced in the modified metal injection system was monitored after sintering. A new system operating with high gas pressure, far from the traditional injection model, has been established for material production. In this system, 316L stainless steel powders were molded using a PEG/PMMA/SA polymer recipe. During molding, approximately 60% 316L and 40% binder by volume were used. The samples obtained were sintered at different temperatures (1100-1300°C) after de-binding. Density measurement (Archimedes) and hardness tests (HV1) of the samples were measured as 6.74 g/cm3 and ~285 HV1, respectively. A potentiodynamic corrosion test was applied to monitor the effect of the amount of oxide in the structure of the 316L stainless steel produced. Corrosion tests were carried out in artificial body solutions. The corrosion rate was measured at the level of 17.08×10–3 mm/y. In terms of biocompatibility, a cytotoxicity test was applied to the samples and the life course of the bacteria was monitored. For the 316L alloys produced, the % vitality reached approximately 103%.
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Autorzy i Afiliacje

Bünyamin Çiçek
1
Yavuz Sun
2
ORCID: ORCID
  1. Hitit University, Vocational School of Technical Sciences, Machine and Metal Technologies Department, Corum, Turkey
  2. Karabuk University, Engineering Faculty, Turkey

Investigation of the Effect of Solidification Time and Addition Amount of Inoculation on Microstructure and Hardness in Lamellar Graphite Cast Iron

M. Çolak E. Uslu Ç. Teke F. Şafak Ö. Erol Y. Erol Y. Çoban M. Yavuz
Archives of Foundry Engineering | 2022 | vol. 22 | No 4 | 24-33 | DOI: 10.24425/afe.2022.140248
Słowa kluczowe Lamellar graphite cast iron Inoculation Solidification time Modeling
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Abstrakt

Material suppliers typically recommend different additive amounts and applications for foundry practices. Therefore, even in the production of the same standard materials, different results may be obtained from various production processes on different foundry floors. In this study, the liquid metal prepared with the addition of different proportions of a FeSi-based inoculation, which is most commonly used in foundries in the production of a cast iron material with EN-GJL-250 lamellar graphite cast iron, was cast into sand molds prepared with a model designed to provide different solidification times. In this way, the optimization of the inoculation amounts on the casting structure for different solidification times was investigated. In addition, hardness values were determined depending on solidification time in varying amounts of inoculation additions. SolidCast casting simulation software was used to determine the casting model geometry and solidification time. In the scope of the study, sand casting, modeling, microstructure analysis, image analysis, microstructure analysis, and hardness tests techniques were used. When the results are examined, the required amount of inoculation for the optimal structure is optimized for the application procedure depending on the casting module and the solidification time.
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Autorzy i Afiliacje

M. Çolak
1
ORCID: ORCID
E. Uslu
1
ORCID: ORCID
Ç. Teke
1
ORCID: ORCID
F. Şafak
2
Ö. Erol
2
Y. Erol
2
Y. Çoban
2 3
M. Yavuz
  1. Bayburt University, Turkey
  2. Konya Technical University, Turkey
  3. Yavuzsan A.Ş., Turkey

Microstructure and Tribological Behavior of Cu-2.5Ti Alloy in Two Different Environments

Ceren Efe Yavuz Sun Yunus Türen Hayrettin Ahlatci
Archives of Metallurgy and Materials | 2022 | vol. 67 | No 4 | 1443-1453 | DOI: 10.24425/amm.2022.141072
Słowa kluczowe Cu-Ti alloys wear behavior corrosive environment hardness
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Abstrakt

In this study, the nominal composition of Cu-2.5Ti alloy was thermally treated to obtain homogenized, aged, and 40% prior cold-rolled+ aged samples. The hardness, wear behavior, and microstructure of samples were investigated. The reciprocating wear tests were performed under four different loads under dry and 3.5%NaCl corrosive environments. The alloy reached its highest hardness value of 8 hours for the aged sample. The hardness value of the sample that was homogenized then cold-rolled by 40% and aged was found higher than the other samples. A decrease in the wear rates in dry conditions was observed in homogenized, aged and cold-rolled and aged samples, respectively. This decrease was more in the corrosive environment. Studies can be advanced by examining the wear behavior at different alloy ratios. The effects of different alloying elements and the ratio of cold-rolled before or after aging can also be investigated for future research.
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Autorzy i Afiliacje

Ceren Efe
1
ORCID: ORCID
Yavuz Sun
2
ORCID: ORCID
Yunus Türen
2
ORCID: ORCID
Hayrettin Ahlatci
2
ORCID: ORCID
  1. Zonguldak Bülent Ecevit University, Gökçebey M. M. Çanakcı Vocational School of Higher Education, Gökçebey, Zonguldak, Turkey
  2. Karabuk University, Department of Metallurgy and Materials Engineering, Karabuk, Turkey

Comparative Study on Different CNN Architectures Developed on Microstructural Classification in Al-Si Alloys

M.F. Kalkan M. Aladag K.J. Kurzydlowski N.F. Yilmaz A. Yavuz
Archives of Metallurgy and Materials | 2024 | vol. 69 | No 2 | 563-570 | DOI: 10.24425/amm.2024.149784
Słowa kluczowe Artificial intelligence Microstructural characterization Al-Si alloy Convolutional Neural Network (CNN) Material classification
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Abstrakt

Recent advances in artificial intelligence have opened up new avenues for microstructure characterization, notably in metallic materials. Physical and mechanical properties generally depend on the microstructure of the metallic material. On the other hand, microstructural characterization takes time and calls for specific techniques that don’t always lead to conclusive results quickly. To address this issue, this research focuses on the application of artificial intelligence approaches to microstructural categorization. We demonstrate the advantages of the AI approach using an example of Al-Si alloy, a material that is widely employed in a variety of industries. To specify a suitable convolutional neural network (CNN) approach for the microstructural classification of the Al-Si alloy, CNN models were trained and compared using DenseNet201, Inception v3, InceptionResNetV2, ResNet152V2, VGG16, and Xception architectures. Resulting from the comparison, it was determined that the developed supervised transfer learning model can execute the microstructural classification of Al-Si alloy microstructural images. This paper is an attempt to advance methods of microstructure recognition/classification/characterization by using Deep Learning approaches. The significance of the established model is demonstrated and its accordance with the literature data. Also, necessity is shown of developing material models and optimization through systematic microstructural investigation, production conditions, and material attributes.
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Autorzy i Afiliacje

M.F. Kalkan
1
ORCID: ORCID
M. Aladag
2
ORCID: ORCID
K.J. Kurzydlowski
2
ORCID: ORCID
N.F. Yilmaz
3
ORCID: ORCID
A. Yavuz
4
ORCID: ORCID
  1. Gaziantep University, Faculty of Engineering, Department of Mechanical Engineering, 27310, Sehitkamil, Gaziantep, Turkiye
  2. Bialystok University of Technology, Faculty of Mechanical Engineering, Wiejska 45C, 15-351 Bialystok, Poland
  3. Gaziantep University, Faculty of Engineering, Department of Mechanical Engineering, 27310, Sehitkamil, Gaziantep, Turkiye; Hasan Kalyoncu University, Board of Trustees, 27410 Gaziantep, Turkey
  4. Gaziantep University, Faculty of Engineering, Department of Metallurgical And Materials Engineering, 27310, Sehitkamil, Gaziantep, Turkiye

A comparative Study on the Mechanical and Corrosion Properties of the ZM20 and ZM21 Alloys after Casting and Rolling

Halil Ahmet Gören Mehmet Ünal Yunus Türen Hayrettin Ahlatçı Yavuz Sun
Archives of Metallurgy and Materials | 2022 | vol. 67 | No 4 | 1387-1394 | DOI: 10.24425/amm.2022.141066
Słowa kluczowe Grain size Hall-Petch relationship yield stress corrosion magnesium
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Abstrakt

In this study, the effects of grain refinement and production methods on the corrosion, corrosive wear and mechanical properties of the as-cast and as-rolled Mg-2 wt.% Zn (ZM20) and Mg-2 wt.% Zn-0,51 wt.% Mn (ZM21) alloys were examined by using OM, XRD, SEM, hardness and uniaxial tensile test. Additionally, the potentiodynamic polarization, immersion corrosion test and corrosive wear properties of the ZM20 and ZM21 alloys were compared. According to the XRD results, MgZn and MgZn2 phases were found in the alloys and also MnZn3 phase occurred in the ZM21 alloy with the addition of manganese. Both during solidification forming nucleation points with the added manganese and during rolling the broken secondary phase particles distributed into the matrix prevented grain growth and led to the formation of a more refined structure. The tensile test results showed that the strength of the as-cast ZM21 alloys were better than that of the as-cast ZM20 alloys and further improvement in mechanical properties occurred with the rolling of the both alloys. The most superior hardness was found in the as-rolled ZM21 alloy. In the total 400-m reciprocal corrosive wear test in the 3.5% NaCl solution, the lowest mass loss was in the as-rolled ZM21 alloys. In the potentiodynamic corrosion test, the highest corrosion resistance was occurred by the as-cast ZM20 alloy.
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Autorzy i Afiliacje

Halil Ahmet Gören
1
ORCID: ORCID
Mehmet Ünal
2
ORCID: ORCID
Yunus Türen
3
ORCID: ORCID
Hayrettin Ahlatçı
3
ORCID: ORCID
Yavuz Sun
3
ORCID: ORCID
  1. Sinop University, The Vocational School, Mechatronic Department, Sinop, Turkey
  2. Karabuk University, Manufacturing Engineering, Turkey
  3. Karabuk University, Metallurgy and Materials Engineering, Turkey

Investigation of Microstructure, Mechanical and Corrosion Properties of Biodegradable Mg-Ag Alloys

Levent Elen Yunus Turen Hayrettin Ahlatci Yavuz Sun Mehmet Unal
Archives of Metallurgy and Materials | 2022 | vol. 67 | No 3 | 889-900 | DOI: 10.24425/amm.2022.139680
Słowa kluczowe Mg-Ag alloys biodegradable mechanical properties microstructure properties corrosion
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Abstrakt

In this study, microstructure, mechanical, corrosion and corrosive wear properties of Mg-xAg the as-cast and extruded alloys (x: 1, 3 and 5 wt. % Ag) were investigated. According to the experimental results, as the amount of Ag added in the casting alloys increases, the secondary phases (Mg4Ag, Mg54Ag17) emerging in the structure have become more clarified. Furthermore, it was observed that as the amount of Ag increased, the grain size decreased and thus the mechanical properties of the alloys increased. Similarly, the extrusion process enabled the grains to be refined and the mechanical properties to be increased. As a result of the in vitro tests performed, the Mg-1Ag exhibited very bad corrosion properties compared to other alloys. On the other hand, according to corrosive wear tests results, a high wear rate and friction coefficient were found for Mg-5Ag alloys.
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Autorzy i Afiliacje

Levent Elen
1
ORCID: ORCID
Yunus Turen
2
ORCID: ORCID
Hayrettin Ahlatci
2
ORCID: ORCID
Yavuz Sun
2
ORCID: ORCID
Mehmet Unal
3
ORCID: ORCID
  1. Karabuk University, TOBB Vocational School of Technical Sciences, Machinery and Metal Technologies Department, Karabuk, Turkey
  2. Karabuk University, Metallurgical and Materials Engineering, Faculty of Engineering, Turkey
  3. Karabuk University, Manufacturing Engineering, Technology Faculty, Turkey

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