Koç, İbrahim
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Koc, Ibrahim
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Department of Medical Services and Techniques / Tıbbi Hizmetler ve Teknikleri Bölümü
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| Journal | Count |
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| Applied Ecology and Environmental Research | 2 |
| Harran Tarım ve Gıda Bilimleri Dergisi | 2 |
| Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi | 1 |
| KSU Tarim ve Doga Dergisi-KSU Journal of Agriculture and Nature | 1 |
| Waste and Biomass Valorization | 1 |
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Article Organik Atıklardan Üretilmiş Odun Sirkelerinin Zararlı Badem Yaprak Arısı Cimbex Quadrimaculata (müller, 1766) (hymenoptera: Cimbicidae)’na İnsektisidal Etkileri(2024) Koç, İbrahim; Özgen, İnanç; Topdemir, Aykut; Güral, YunusTarımsal faaliyetlerde, kullanılan kimyasal pestisitlere alternatif organik ürünlere gün geçtikçe daha çok gereksinim duyulmaktadır. Bu alternatif potansiyelli ürünlerden odun sirkesi (OS, piroliz sıvı), organik atıklardan enerji ve Biyokömür (Biochar) gibi faydalı ürünlerle birlikte elde edildiği karbonizasyon işlemi sonucunda üretilmektedir. Bu çalışma, Broiler (etçil) tavuk yetiştiriciliği altlığı ve fındıkkabuklarından üretilmiş OS’ların zararlı badem yaprak arısı Cimbex quadrimaculata (Müller, 1766) (Hymenoptera: Cimbicidae)’na insektisidal etkilerini belirleme amacı ile yapılmıştır. Çalışma, Diyarbakır (Eğil ilçesi) ve Elâzığ (Keban ilçesi) illerinde bulunan birer badem alanında 2019-2021 üretim sezonlarında yürütülmüştür. OS karışımlı solüsyonlar (%1, 3, 5, 7, 10 ve 25), bulaşıklı badem bahçelerinde 7., 14. ve 21. günlerde darbe ve gözle kontrol yöntemleri ile belirlenmiştir. Elde edilen verilerin analizinde, Kruskal-Wallis testi uygulanmıştır. Sonuç olarak; OS katkılı solüsyonların zararlı badem yaprak arısına karşı insektisidal etki gösterdiği ve larva sayısında ise en fazla düşüşün %10 ile %25’lik dozlarda gerçekleştiği tespit edilmiştir. Bu sirkelerin daha detaylı çalışmalarla farklı lokasyonlarda denenmesi, iklimsel faktörler ve zararlının populasyon ekolojisine bağlı olarak detaylı biyoekolojik çalışmaların yapılması zararlı ile alternatif mücadele açısından önemlidir. Bu çalışmanın verileri, badem entegre zararlı yönetimi (IPM)çalışmaları için temel veriler içermektedir.Article Content Analysis and Antimicrobial Activity of Pyrolysis Liquid Obtained From Oak Residue (Quercus Sp.)(Corvinus University of Budapest, 2025) Koç, I.The search for organic pesticides continues due to the adverse effects of chemical pesticides used against plant pathogens such as bacteria, and fungi. The evaluation of agricultural and forestry residues within this framework is of vital importance from many perspectives. This study was conducted to determine the activity of pyrolysis liquid (PL) prepared at different concentrations ranging from 1% to 25%, v/v against certain plant pathogenic bacteria and fungi. The PL was obtained from a company that produces charcoal through carbonization at temperatures ranging from 100 to 550 °C. The study was carried out in vitro under a Randomized Plot Design with four replications. The content analysis of PL was determined using solid-phase microextraction (SPME) followed by gas chromatography-mass spectrometry (GC-MS). The detection of antifungal activity was performed using the Poisoned Food Method on Malt Extract Agar, while antibacterial activity was determined using the Agar Well Diffusion Method on Mueller-Hinton Agar. Statistical analyses of the obtained datasets (factorial ANOVA) indicated that both the statistical significance of the concentration (P=0.001) and its practical importance (effect size=0.9953) were significant. It was determined that concentrations of PL at 2% and above (v/v) completely inhibited fungi populations. It is suggested that the PL used in this study has potential antifungal activity and can be utilized for various purposes, particularly in plant protection activities. © 2025, ALÖKI Kft., Budapest, Hungary.Article Analysis of Pyrolysis Liquid From Green Walnut Shells (Juglans Regia L.) and Its Antifungal Activity Against Pathogenic Fungi in Ornamental Plants(Corvinus University of Budapest, 2025) Koç, İ.Pathogenic fungi damage ornamental plant production in both quality and quantity. Organic fungicides are significantly needed for the control of these pathogens. This study was carried out to analyze the content of pyrolysis liquid (PL) obtained from green walnut shells (Juglans regia L.) and to evaluate its antifungal activity against Fusarium oxysporum and Verticillium dahliae. This research was carried out under in vitro conditions with 5%, 10%, 15%, 20% and 25% (v/v) PL solution applications in a Randomized Plot Design with four replications. The Poisoned Food Method was used to determine the antifungal activity of PL. As a result of chemical content analysis of PL, 53 components were detected by GC-MC, and the major components were propanoic acid, 2-hydroxy-(CAS) (21.69%), e-2-undecenal (7.11%), and nonanal (5.76%). Twelve components were detected by LC-MS/MS, with vanillic acid (393.28 µg/L), vanillin (334.34 µg/L), and syringic acid (222.80 µg/L) identified as the major components. Total phenolic content (201.76 ± 12.50 mg GAE/mL) and total flavonoid content (114.74 ± 4.50 mg QE/mL) were determined. Therefore, the effect of concentration on colony size varied depending on the species. It was determined that PL showed stronger antifungal activity at higher concentrations, with the highest activity observed at the 25% (v/v) solution. © 2025, ALÖKI Kft., Budapest, Hungary.Article Neem Azal T/S’nin Badem Yaprak Arısı, Cimbex quadrimaculata (Müller, 1766) (Hymenoptera: Cimbicidae) Larvaları Üzerinde Beslenme Engelleyici Etkisinin Belirlenmesi(2025) Güral, Yunus; Koç, İbrahim; Topdemır, Aykut; Özgen, İnançBu çalışmada, badem yaprak arısı Cimbex quadrimaculata (Hymenoptera: Cimbicidae) larvalarına karşı Neem Azal T/S bitki ekstraktının laboratuvar koşullarında maksimum beslenme engelleyici indeks (AFI) değeri belirlenmiştir. Çalışmada, yaprak daldırma yöntemi uygulanmış ve ölçüm konsantrasyonları %0 (Kontrol), %0.8, %1.0, %1.2, %2, %4, %6, %8 ve %10 olarak belirlenmiştir. Ekstrakt, zararlının 3. ve 4. dönem larvalarına karşı uygulanmıştır. Ekstraktın farklı dozlarının anti beslenme indeksleri seçenekli ve seçeneksiz metoda göre hesaplanmış, veriler arasında farkın olup olmadığı Kruskal Wallis testi ile belirlenmiştir. Seçenekli ve seçeneksiz metotlar arasındaki farklar da istatistiki olarak Mann Whitney U testi ile belirlenmiştir. Çalışma sonucunda, her iki larva döneminde de seçenekli ve seçeneksiz metotlar içerisinde en yüksek AFI değeri % 10 konsantrasyon için kaydedilmiştir. En düşük AFI değeri ise iki metotta da her iki larva döneminde en düşük konsantrasyon olan %0.8’lik dozda ve ve zararlının 4. larva döneminde belirlenmiştir. Ekstraktın konsantrasyonu arttıkça, C. quadrimaculata larvalarının daha az yaprak tükettiği saptanmıştır. Sonuç olarak, en yüksek AFI değerlerinin %8 ile %10’luk dozlarda gerçekleştiği, Neem Azal T/S’ın doz artışıyla birlikte etkililiğinin arttığı belirlenmiştir.Article Citation - WoS: 1In Vitro Cytotoxicity and Antioxidant Evaluation of Oak (Quercus sp.) and Hazelnut Shell (Corylus avellana L.) Pyrolized Wood Vinegar: MTT Assay and CUPRAC Results(Springer, 2025) Koc, Ibrahim; Sabancilar, Ilhan; Kaya, Seckin; Mendes, Mehmet; Keskin, Cumali; Eftekhari, AzizWood vinegar, also known as pyroligneous acid, is an organic liquid byproduct of wood pyrolysis, rich in compounds such as acetic acid, phenols, and ketones. This study aimed to evaluate the antioxidant and anticancer properties of wood vinegar derived from oak (Quercus sp.) residues (WVO) and hazelnut shells (Corylus avellana L.) (WVH) under in vitro conditions. Method: Wood vinegars obtained from oak trash and hazelnut shell waste were tested for biological activity. The antioxidant capacity was assessed using the copper(II) reducing antioxidant capacity (CUPRAC) method. Cytotoxic effects were evaluated using the MTT assay on healthy human endothelial cells (HUVEC) and two cancer cell lines (HT29-colon adenocarcinoma and U2OS-osteosarcoma) at concentrations ranging from 1.25% to 20% (v/v) over 24, 48, and 72-hour exposure periods. The results revealed significant interactions between vinegar type, concentration, and exposure duration. Notably, the 10% and 20% (v/v) concentrations produced significantly different absorbance values compared to lower concentrations across all time points. A dose-dependent decrease in cell viability was observed, particularly in the cancer cell lines, while healthy cells exhibited relatively higher resistance. The study demonstrates that wood vinegar exhibits promising antioxidant and selective anticancer properties, with cytotoxic effects being more pronounced at higher concentrations. These findings suggest that wood vinegar may offer potential as a natural anticancer agent. Further research is warranted to elucidate the underlying mechanisms and to explore their possible therapeutic applications.Article Effects of Pesticide and Wood Vinegar Applications on Surface-Dwelling Arthropods in the Wheat(Kahramanmaras Sutcu Imam Univ Rektorlugu, 2026) Koc, Ibrahim; Yardim, Erdal NecipThis study was conducted to determine the effects of certain pesticides (herbicides, fungicides) used in the wheat agro-ecosystem and wood vinegar (WV) produced from Broiler chicken bedding on soil-dwelling arthropods. The research was carried out under the ecological conditions of Mu & scedil; province during the 2014-2016 production seasons. Pesticide and WV applications were carried out using a backpack sprayer as follows: First, the application of pesticides (fungicides and herbicides); Secondly, corresponding to each pesticide application, WV applications were made at concentrations of 0.5%, 1%, 2%, 3%, 4%, and 5% (v/v). Finally, a control application was conducted using only tap water in response to the pesticide and WV applications. Arthropod sampling was conducted using pitfall traps. The arthropods captured in the traps were considered in terms of their family (Carabidae, Gryllidae, Araneidae, and Formicidae), Order (Opiliones), and the number of individuals of other arthropods. Simple Correspondence Analysis Technique was used for data analysis. As a result, it was observed that the applications affected the number of arthropods considered. Additionally, it was determined that there was an increase in the number of arthropods captured in traps in the 2016 season compared to 2015. In comparison to the control application, the average number of arthropods captured in the traps for the Carabidae family was highest in the 1% WV application (42.49 individuals) and lowest in the pesticide application (18.44 individuals); for the Araneidae family, it was highest in the 5% WV application (23.97 individuals) and lowest in the pesticide application (14.66 individuals); for the Formicidae family, it was highest in the 1% WV application (38.41 individuals) and lowest in the 0.5% WV application (17.69 individuals); for the Opiliones order, it was highest in the 4% WV application (24.55 individuals) and lowest in the pesticide application (10.69 individuals); and for other arthropods, it was highest in the pesticide application (35.66 individuals) and lowest in the 1% WV application (23.05 individuals). According to statistical analyses, significant relationships were identified between the applications and the number of arthropods captured in the pitfall traps.Article Bitlis İlindeki Öğretmenler ve Yöneticilerin Çevre Bilinci Düzeylerinin İncelenmesi(2025) Koç, İbrahim; Kanbur, HaticeÇağımızın güncel ve önemli sorunlarından bir tanesi de her geçen gün artan ve diğer sorunların ortaya çıkmasına neden olan çevre kirliliği problemidir. İnsanların çevresel konulara dair bilinçleri, bu sorunun devamlılığını veya çözümünü etkilemektedir. Bu araştırma, Bitlis ilindeki okullarda çalışan öğretmenler ve yöneticilerin çevre bilinç düzeyini incelemek amacıyla gerçekleştirilmiştir. Araştırma, 2021-2022 akademik yılının bahar döneminde 783 öğretmen ve yönetici ile yapılmıştır. Araştırmada veri toplama araçları olarak \"Demografik Bilgi Formu\" ve \"Çevresel Bilinç Ölçeği\" kullanılmıştır. Araştırmadan elde edilen bazı bulgulara bakıldığında; katılımcıların %89,02'sinin üniversite mezunu olduğu; %87,87'sinin öğretmen olduğu; %91,95'inin çevreyi korumaya yönelik bir sivil toplum kuruluşuna üye olmadığı; %97,83'ünün çevresel konulara ilgi duyduğu ve çoğunluğunun küçük bir şehirde yaşadığı (%78,29) tespit edilmiştir. Katılımcıların, çevre bilinci düzeyi, tutum, bilgi ve davranış alt boyutlarında değerlendirilmiştir. Çevre bilinci düzeyini belirlemede, Likert tipi ölçek kullanılarak analiz edilmiş ve çevre bilinci seviyesi yüksek bulunmuştur (M=3.81, SD=0.33). Sonuç olarak; katılımcıların, çevrelerindeki kirliliğe duyarlı oldukları, çevre bilgisi ve tutumlarının olmasına rağmen davranışa dönüştürülmesi konusunda eksikliklerinin olduğu tespit edilmiştir.
