Browsing by Author "Celik, Savas"

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Determination of Fermentation Properties and Digestibility Characteristics of Combination of Corn-Soybean and Corn Silages
(Medwell online, 2009) Demirel, Murat; Celik, Sibel; Temur, Cuneyt; Guney, Mehtap; Celik, Savas
This study was conducted to determine in vivo digestibility and fermentation property of various silages made of green herbage of Corn (C) and corn-soybean mixtures at different rates (90% corn + 10% soybean (90C10SB), 80% corn + 20% soybean (80C20SB), 70% corn + 30 soybean (70C30SB)). Each mixture was prepared at rates given above on fresh material basis and ensiled in 120 L plastic barrels (a total of 20, 5 replicate for 4 treatments) for 90 days. pH values of C silage were higher and acetic acid levels were lower than that of 80C20SB (p<0.05). Concentrations of lactic and propionic acid of corn-soybean mixture silages were found to be similar to C silage. Digestibility of DM, OM, ADF and NDF were higher in C silage than that of other silages, whereas digestibility of CP and EE of 80C20SB silage were higher than corn silage (p<0.05). It was concluded that ensiling corn with 20 or 30% soybean addition at green herbage basis generates desirable outcomes for fermentation properties and digestibility of crude nutrients.
Effect of Various Additives and Harvesting Stages on Rumen Degradation of Sunflower Silages
(Taylor & Francis Ltd, 2009) Demirel, Murat; Bolat, Duran; Eratak, Serdar; Celik, Sibel; Bakici, Yunus; Celik, Savas; Guney, Mehtap
To study effective degradability (nylon bag technique) of sunflower silage, as influenced by harvesting stage (blooming, milk or dough) or molasses (m) / urea (u) mixture, seven different silage samples for each harvest stage [sunflower (SF) and 6 mixtures (2%mSF, 4%mSF, 2%m+0.5%uSF, 2%m+1%uSF, 4%m+0.5%uSF, 4%m+1%uSF)] were incubated for 70 days in 1 litter jars. The DM and CP effective degradation of SF silage was found to be similar at blooming and milking stage and higher than that of dough stage (P < 0.05). The effective degradation of ADF and NDF of SF silage at milking and dough stages was lower than that of blooming stage. The positive effects of molasses and molasses+urea additives on effective degradability were observed. It was concluded that decreased degradability of nutrient matters because of its advanced vegetational stage could be partly compensated by using different amount of molasses and molasses+urea additives.
The Effects of Adding Urea and Molasses To Corn Harvested at Dough Stage on Silage Fermentation Quality, in Vitro Organic Matter Digestibility and Metabolic Energy Contents
(Medwell online, 2009) Celik, Sibel; Budas, Cemal; Demirel, Murat; Bakici, Yunus; Celik, Savas
The aim of this study was to evaluate the effects of ensiling corn harvested at the milk stage by addition of various amount of Molasses (M), Urea (U) and Urea + Molasses (UxM) on quality, in vitro Organic Matter Digestibility (IVOMD) and Metabolic Energy (ME) contents. Five silage samples from 16 treatment groups were prepared in I I jars and incubated for 70 days. The ME values and IVOMD with lactic acid levels of 1% U added silages were higher compared to other silages. It has been concluded that either unsupplemented or 1% U added ensiling will be a suitable ensiling technique to corn.
Quality of Silages From Sunflower Harvested at Different Vegetational Stages
(Taylor & Francis Ltd, 2006) Demirel, Murat; Bolat, Duran; Celik, Sibel; Bakici, Yunus; Celik, Savas
This study was carried out to determine qualities and in vivo digestibility of silage of sunflower green herbage harvested at blooming, milk or dough stage and incubated in 120 l plastic barrels for 90 days. While dry matter, organic matter and crude fat content increased at dough stage, acid detergent fiber and neutral detergent fiber decreased (P < 0.05). The highest lactic and propionic acid and the lowest butyric acid and pH values were observed in blooming stage silage. While dry grass yield and table ratio increased with maturity, stem and leaf ratio as well as digestibility of most of the nutrients decreased (P < 0.05). It may be concluded that high quality alternative silages could be obtained from sunflower green herbage, best coming from bloom stage.
Synthesis, Characterization, Quantum Chemical Studies and Electrochemical Performance of New 4,7-Dihydrotetrazolo[1,5 Derivatives
(indian Acad Sciences, 2019) Akbas, Esvet; Celik, Savas; Ergan, Erdem; Levent, Abdulkadir
In this study, 4,7-dihydrotetrazolo[1,5-a]pyrimidine derivatives (1-5) were prepared via Multicomponent Cyclocondensation Reactions (MCRs). All structures were determined by using FT-IR, 1H/13C NMR and elemental analyses. The compounds were investigated as corrosion inhibitors using density functional theory (DFT) at the level of B3LYP/6-31G (d, p). According to the calculations, compound 1 appears to be a good inhibitor for corrosion. In addition, the electrochemical properties of the novel systems were investigated by CV.Graphical Abstract:The synthesis, characterization, quantum chemical studies and electrochemical performance of new 4,7-dihydrotetrazolo[1,5-a]pyrimidine derivatives are reported.