Yayın Koleksiyonu
Bu koleksiyon için kalıcı URI
Güncel Gönderiler
Öğe Use of Oak Acorn Kernel (Quercus ithaburensis Decaisne)-Containing Substrates in Oyster Mushroom (Pleurotus ostreatus) Cultivation and Comparison with Traditional Growing Media(2026) Uyanık, Çınar M.; Ceylan, F.; Arslan, Recai; Akçay, Ç.This study aimed to evaluate the effects of different substrates containing oak acorn kernel on the cultivation of Pleurotus ostreatus for yield, biological efficiency (BE), and nutritional content. Different lignocellulosic wastes were used: Oak Acorn Kernel (AK), Oak Acorn Shell (AS), Oak Acorn Cup (AC), Hazelnut Branch (HB), Wheat Straw (WS), Acacia Branch (AB), Corncob (CC), and Oak Sawdust (OW). Substrates were prepared at 100% ratio and as 50% mixtures with WS; additionally, AK was supplemented with OW at 10%, 30%, and 50% ratios. Protein, phenolic content, and mineral compositions of mushrooms were analyzed. Chemical composition of substrates were revealed through chemical analyses. The highest mushroom yield was obtained from 50WS+50CC with 205.7 g/kg, while the maximum biological efficiency (57.6%) and benefit–cost ratio (4.98) were determined in the 50OW+50AK. The greatest phenolic content was found in mushrooms of HB substrate (58.781 mg GAE/g), the highest protein contents were detected in mushrooms grown on OW (28.43 g/100g) and AK (29.21 g/100g). Cu, Mn, P, and Zn elements were found to be higher in mushrooms of OW and AK substrates. This study makes a significant contribution to the circular economy by converting low-value forest wastes into value-added food products such as edible mushrooms.Öğe Differential Effects of Compost on Pepper (Capsicum annuumL.) Seedlings Under LED vs. Shade Daylight Conditions(Turkish Science and Technology Publishing (TURSTEP, 2026) Ceylan, F.; Arslan, RecaiOrganic fertilizers are very important tools during production of seedlings due to the huge potential regarding the substitution of chemical fertilizers. Light is a vital component for reliableproduction. The purpose of this study was the evaluation of the differential effect of light and fertilizer sources on the morphology, physiology, and anatomy of pepper seedlings. In this regard, pepper (Capsicum annuum L.) seedlings were cultivated with growing media of control (C), 100% compost (100C), 50% compost (50C), 25% compost (25C), and fertilization with compost tea (CT) and chemical fertilizer (CF). LED (light-emitting diode) light and shade daylight were used for the light source. Mean height, leaf number, total leaf area, stem diameter, aboveground biomass, net photosynthesis (A-net), stomatal conductance (gs), transpiration rate (E), intrinsic water use efficiency (iWUE = A-net/gs), ratio of intercellular to ambient CO2(Ci/Ca), soil and plant analyzer development (SPAD) value, width of cortical layer and secondary xylem of stem, and number of stem vessels of pepper seedlings were measured. The highest A-net, iWUE, total leaf area, and aboveground fresh and dry biomass were measured at 3.2 ?mol CO2m-2s-1, 101.2 ?mol mol-1, 649.3 cm2, 16.86 g, and 1.425 g, respectively, in seedlings cultivated with 100% compost at shade daylight conditions. Although there was not any significant difference in A-net, gs, and iWUEof seedlings cultivated with different doses or types of fertilizer compared to control at LED light conditions, aboveground fresh and dry biomass was measured at its highest on seedlings of 100C. While stoma density on seedlings fertilized with compost tea was measured as the highest, it had no beneficial effect on physiological (A-net, gs) and morphological (mean aboveground fresh biomass, etc.) characteristics of seedlings. In conclusion, usage of mature compost as fertilizer had influence on the cultivation of pepper seedlings when an appropriate light source was provided. Light spectrum, depending on the light source, could have more influence than light intensity on the growing characteristics of pepper seedlings.Öğe Effects of compost and compost water extract derived from agricultural wastes on yield and nutritional composition of Lepidium sativum microgreens(Ersin Yücel, 2026) Ceylan, Faik; Arslan, Recai; Akçay, ÇağlarPurpose: The aim of this study was to evaluate the yield, chlorophyll and carotenoid content, and nutritional profile of Lepidium sativum microgreens cultivated with compost, compost water extract, and peat. Method: Control (100% peat), C100 (100% compost), C50 (50% peat+50% compost), C25 (75% peat+25% compost), and WE100 (100% water extract), WE50 (50% water extract), and WE25 (25% water extract) obtained from compost were used for cultivation of L. sativum microgreens under LED (light-emitting diode) light source. Fresh weight of shoot (mg/shoot), fresh yield (kg/m2), dry biomass (g/m2), and chlorophyll, carotenoid, and nutrition element content of microgreens were measured. Estimated daily intake (EDI) of macro- and microelements of microgreens was calculated. Findings: While the highest mean fresh weight of shoot of L. sativum microgreens was measured as 27.65 mg/shoot in media of C50, the highest fresh yield and dry biomass of microgreens were measured as 1.870 kg/m2 and 94.81 g/m2 in media of WE50. Chlorophyll a content of microgreens cultivated in C100, C25, and WE100 was significantly lower than control (P<0.01, P<0.01, and P<0.05, respectively). Total chlorophyll content of microgreens in C25, rather than other media, was significantly lower compared to control (P<0.05). Chlorophyll b and carotenoid contents in all media were not significantly different compared to those of control. N content of L. sativum microgreens cultivated in WE100 was significantly higher than control at the significant level of P<0.05. Contents of Mg, Zn, and Na of microgreens of WE100 were lower compared to those of control at the significant levels of P<0.01, P<0.01, and P<0.0001, respectively. There was not any significant difference in contents of P, K, S, Ca, Fe, Mn, and Cu between microgreens of control and WE100. Total phenol content of microgreens in WE100 was higher than control at the significant level of P<0.05. Conclusion: There was a very low effect of application of compost water extract on nutrient elements of L. sativum microgreens. Their applications increased the yield of L. sativum microgreens. The use of compost for higher yields of L. sativum microgreens for substitution of peat was very attendant regarding limiting the use of peat materials.Öğe Sustainable High-Density Polyethylene Composites Reinforced with Olive Pomace: Production and Characterization(Orhan Canpolat, 2026) Arslan, Recai; Subaşı, AzimeIn this study, olive pomace (OP), an abundant agro-industrial by-product, was incorporated into a high-density polyethylene (HDPE) matrix at loadings of 0–20 wt.% to develop sustainable polymer composites. The influence of OP loading on the physical, mechanical, structural, and thermal properties of the composites was systematically investigated. Increasing OP loading resulted in elevated moisture content and water absorption, attributed to the hydrophilic nature of the lignocellulosic filler. Composite density and Shore D hardness exhibited a progressive increase with OP loading. In contrast, tensile and impact properties remained statistically not significantly changed at 5 wt.% OP loading, while higher filler loadings (10–20 wt.%) resulted a significant decrease in mechanical performance, accompanied by a transition from ductile to more brittle fracture behavior. Fourier-transform infrared spectroscopy (FTIR) analysis indicated a decrease in the intensity of characteristic HDPE bands and partial disruption of polymer crystallinity, suggesting predominantly physical interactions between the matrix and filler. Thermogravimetric analysis (TGA) revealed a decrease in the onset degradation temperature with OP addition; however, enhanced char formation contributed to improved thermal stability at higher degradation stages. Overall, the findings suggest that OP is more suitable for use in HDPE composites at relatively low filler loadings.Öğe Biochemical and structural differences between C3 cotyledons and C4 leaves in species of Salsoloideae (Chenopodiaceae)(Nature, 2025) Kocacinar, F.; Ceylan, Faik; Cömertpay, S.C4 plants had evolved from C3 ancestors in at least more than 60 independent lineages of angiosperms, most probably in response to decreasing levels of atmospheric CO2 and environmental conditions promoting photorespiration. Salsola, Petrosimonia, and Cyathobasis genera of Salsoloideae subfamily contain some species with C3 cotyledons followed by C4 leaves. The aim of this study was to determine and compare the biochemical and structural differences between C3 cotyledons and subsequent C4 leaves in these genera. The results showed that there were isopalisade C3 cotyledons in Salsola grandis and isolateral C3 cotyledons in Cyathobasis fruticulosa, while salsoloid type C4 Kranz anatomy was present in subsequent leaves. Petrosimonia nigdeensis had dorsiventral C3 cotyledons and salsoloid-type C4 leaves. The proteins of C4 isoform phosphoenolpyruvate carboxylase (PEPC) and pyruvate orthophosphate dikinase (PPDK) enzymes were absent or very sparse in C3 cotyledons of these species, whereas they were abundant in their C4 leaves. The proteins of photorespiratory isoform glycolate oxidase (GOX) and glycine decarboxylase-H subunit (GDC-H) were generally higher in cotyledons than leaves. The protein level of photosynthetic isoform ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco) enzyme was lower in C4 leaves compared to C3 cotyledons. Transcript levels of these enzymes were generally consistent with their protein content except for GOX in S. grandis and S. tragus and glycine decarboxylase complex (GDC) in S. tragus. As a result, we demonstrated that not only the protein and transcript levels of the enzymes required for C4 pathway increased, but also those levels of C3 and photorespiratory enzymes decreased during the transition from C3 cotyledons to C4 leaves. These results are considered significant in terms of shedding light on the understanding of evolutionary transition from C3 to C4 biochemical pathway in a single plant and contributing to C4 engineering.Öğe 2,4-Diklorofenoksi asetik asit (2,4-D) uygulanmış topraktan izole edilen bakterilerin 2,4-d biyokimyasal yıkım kabiliyetlerinin incelenmesi(Artvin Çoruh Üniversitesi, 2020) Kurtoğlu, C.; Ceylan, Faik; Cömertpay, S.; Akyol İ.2,4-diklorofenoksi asetik asit (2,4-D), fenoksi asitler grubuna dahil olan, seçici bir herbisittir. Topraktaki 2,4-D kalıntılarının çevre ve insan sağlığına zararlı etkileri olduğu bilinmektedir. Bu sorunlar ile baş etmedeki en önemli faktörlerden birisi herbisitleri besin olarak kullanıp yıkımını sağlayan toprak bakterileridir. Bu çalışmada, Balıkesir bölgesinde, 2,4-D ile muamele edilmiş tarım arazisinden izole edilen bakterilerin, bu herbisiti yıkım potansiyellerinin spektrofotometrik testler ve HPLC yardımıyla belirlenmesi hedeflenmiştir. Öncelikle, bu bakterilerin protein analizi yöntemiyle moleküler düzeyde tanımlanması amaçlanmıştır. Bu amaç doğrultusunda; seri seçilimlerle elde edilen bakteri kolonilerinin, karbon kaynağı olarak yalnızca iki farklı derişimde (0.1g/L, 0.5g/L) 2,4-D içeren besiyerinde yetişmeleri sağlanmıştır. Yetiştirilen bakterilerin büyüme hızları 14. günde takip edilmiş ve bakterilerin yıkım yeteneklerinin anlaşılması için besi ortamında kalan 2,4-D miktarları aynı süre sonunda ölçülmüştür. Elde edilen sonuçlara göre bu çalışmada 2,4-D’yi yıkabilen bir bakteri bulunamamış, ancak Acinetobacter baumannii, Acinetobacter calcoaceticus ve Stenotrophomonas sp. bakterilerinin 2,4-D’li ortamda büyüyebildikleri tespit edilmiştir.Öğe CONSUMPTION TYPES OF WILD PLANTS CONSUMED AS FOOD AROUND ESKİŞEHİR (TURKEY)(Eskişehir Teknik Üniversitesi, 2018) YÜCEL E.; IŞIK, G.; YÜCEL ŞENGÜN, İ.; KÖSE, Y.B.; Ceylan, Faik; DEMİRCİ, B.; ŞENTÜRK, H.In this study, Eskişehir city and its environment were defined as a study area and wild plants consumed as food in this region were selected as research material. According to the study, 28 wild plants consumed as food around Eskişehir were determined. These plants were identified as Amaranthus retroflexus (Kızılbacak), Beta corolliflora (Kır Pancarı), Capsella bursa-pastoris (Çoban Çantası), Carduus nutans (Devedikeni), Centaurea urvillei (Çoban Çökerten), Chenopodium album (Sirken), Cichorium intybus (Karakavuk), Erodium cicutarium (Çoban İğnesi), Galega officinalis (Keçisakalı), Glaucium corniculatum (Boynuz Gelincik), Lactuca serriola (Acı Marul), Malva neglecta (Ebegümeci), Nasturtium officinale (Su Teresi), Papaver rhoeas (Gelincik), Papaver somniferum (Haşhaş), Polygonum lagathifolium (Madımak), Portulaca oleracea (Semizotu), Ranunculus ficaria (Arpacıksalebi), Raphanus raphanistrum (Turpotu), Rumex acetosa (Kuzukulağı), Rumex crispus (Labada), Silene alba (Toklubaşı), Stellaria media (Bulgurcuk), Taraxacum officinale (Acıgüneyik), Tragopogon dubius (Yemlik), Tragopogon pratensis (Teke Sakalı), Urtica dioica (Büyük Isırgan) and Urtica urens (Küçük Isırgan). The findings of this study have revealed that the wild plants are an important alternative to well known agricultural products and have important potential for the realization of sustainable rural development.Öğe Düzce ve Çevresinde Gıda Olarak Tüketilen Yabani Bitkilerin Tüketim Biçimleri ve Besin Öğesi Değerleri(Afyon Kocatepe Üniversitesi, 2015) Ceylan, Faik; Yücel, E.Bu çalışmada Düzce ve çevresinde yayılış gösteren yabani gıda bitkilerinin yerel halk tarafından tüketim biçimleri ve bu bitkilerin gıda içerikleri araştırılmıştır.Düzce ve çevresinde, Falcaria vulgaris (Kazayağı), Tussilago farfara (Kabalak), Trachystemon orientalis (Kaldirik), Capsella bursa-pastoris (Çobançantası), Raphanus raphanistrum (Yabani turp), Chenopodium album subsp. album var. album (Sirken), Vaccinium myrtillus (Çalı çileği), Mentha longifolia subsp. typhoides var. typhoides (Yabani Nane), Thymus praecox subsp. skorpilii var. skorpilii (Kekik), Malva neglecta (Ebegümeci), Portulaca oleracea subsp. oleracea (Semizotu), Urtica dioica (Isırgan) olmak üzere 10 familyaya ait 12 bitki taksonu belirlenmiştir. Su miktarı en yüksek Kaldirikte (% 84,9), en düşük Yabani turpta (% 44) belirlenmiştir. Organik madde miktarı en yüksek Çalı çileğinde (% 94) belirlenirken en düşük Semizotunda (% 76) tespit edilmiştir. Protein miktarı en yüksek Yabani turpun yaprağında (% 32,26), en düşük Semizotunda (% 1,59) belirlenmiştir. Yağ miktarı en yüksek Kabalağın yaprağında (% 2,33), en düşük Semizotunda (% 0,33) tespit edilmiştir. Selüloz miktarı en yüksek Kekikte (% 28,1), en düşük Yabani turpun kök kısmında (% 8,35) belirlenmiştir. Tanen içeriğinin en yüksek Isırganda (229,9 g. kg-1 KA), en düşük Yabani turpun kök kısmında (5,2 g. kg-1 KA) olduğu saptanmıştır. Antioksidan kapasite en yüksek Kabalağın yaprak sapında (4,734 mmol TR g-1 ), en düşük Yabani turpun kök kısmında (1,004 mmol TR g-1 ) tespit edilmiştir. Araştırılan tüm bitkilerde, en yüksek mineral madde içeriği K, en düşük Cu minerali olarak belirlenmiştir.Öğe Glifosat uygulanmış topraktan izole edilen bakterilerin herbisit degradasyon potansiyellerinin belirlenmesi(Ersin Yücel, 2020) Kurtoğlu, C.; Ceylan, Faik; Cömertpay, S.; Akyol İ.Glifosat (N-fosfonometilglisin), kararlı karbon-fosfat (C-P) bağlı, sentetik ve seçici olmayan bir herbisittir. Topraktaki glifosat kalıntılarının çevre ve insan sağlığına zararlı etkileri olduğu bilinmekle birlikte, herbisitleri besin olarak kullanıp parçalanmasını sağlayan toprak bakterilerinden bu zararlı etkileri azaltmak için yararlanılmaktadır. Bu çalışmada, Kahramanmaraş Sütçü İmam Üniversitesi’ne ait, glifosat ile muamele edilmiş tarım arazisinden izole edilen bakterilerin tanımlanması ve bu herbisiti degrade etme potansiyellerinin belirlenmesi hedeflenmiştir. Bu amaçla kullanılacak bakteri kolonileri seri seçilimlerle elde edilmiş ve gen bölgesi sekanslaması ve/veya proteine dayalı tanımlama yapan MALDI-TOF (Matrix Assisted Laser Desorption and Ionization Time-Of-Flight ) yöntemleri kullanılarak elde edilen bakterilerin tür tanımlanması yapılmıştır. Sonrasında, bu bakteriler 0.1g/L, 0.5g/L ve 1g/L glifosat dışında başka karbon kaynağı içermeyen besiyeri içerisinde yetiştirilmiş ve büyüme hızlarının belirlenmesi için 14. günde 600 nm’de absorbansları ölçülmüştür. Ayrıca, bakterilerin glifosat degradasyon yeteneklerinin belirlenmesi maksadıyla; besiyerlerinde kalan glifosat miktarları, aynı süre sonunda 570 nm’de absorbanslarının ölçülmesiyle belirlenmiştir. Elde edilen sonuçlar; izole edilen bakterilerin hiçbirinin glifosatı degrade edemediğini, glifosatın bazı bakterilerin büyümesini olumsuz yönde etkilediğini ve glifosat içeren ortamda büyüme miktarı en yüksek olan bakterilerin Klebsiella variicola ve Klebsiella pneumoniae olduğunu ortaya koymuştur.
