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Öğe A new record for Caulerpa mexicana Sonder ex Kützing from eastern Mediterranean Coast of Turkey(2009) Erduğan, Hüseyin; Aysel, Veysel; Dural, Berrin; Akgül, Rıza; Balıkçı, Özcan; Miçooğulları, Cumhur; Akgül, FüsunBu araştırmada Doğu Akdeniz'de Hatay kıyısında yayılış gösteren Caulerpa mexicana Sonder ex Kützing Türkiye kıyıları için ilk kez verilmektedir. Türkiye kıyılarında ilk kez 1971 yılında gözlenen Caulerpa üyeleri bugün 10 taksona ulaşmıştır. Önceki çalışmalarda Caulerpa üyelerinin deniz yaşamını göçmen ve istilacı özellikleri ile tehdit ettikleri belirtilmiştir. Doğu Akdeniz de ilk kez Filistin de Rayss (1941) tarafından bulunan C. mexicana taksonu da sahip olduğu bu özellikleri ile kıyılarımıza giriş yapmıştır.Öğe Amino acid composition and crude protein values of some Cyanobacteria from Çanakkale (Turkey)(Pakistan Journal of Pharmaceutical Sciences, 2015) Akgül, Riza; Kizilkaya, Bayram; Akgül, Füsun; Erdu?an, HüseyinCyanobacteria (blue-green algae) form an important component of integrated nutrient managements in agriculture and are exploited in commercial biotechnological ventures. In this study, Rivularia bullata (Poir) Berkeley ex Bornet & Flahault, Nostocs pongiaeforme C. Agardh ex Bornet & Flahault were researched for their amino acid composition and crude protein values. R. bullata was collected from coastal zones of the Gulf of Saros and N. spongiaeforme from the Ayazma Stream. The levels of amino acids were measured in algae samples using EZ: fast kits (EZ: fast GC/FID Protein Hydrolysate Amino Acid Kit) by gas chromatography. The crude proteins of samples were determined by the Kjeldahl method and were calculated using a nitrogen conversion factor of 6.25. Thirty-two amino acids were investigated, for N. spongiaeforme eight free essential amino acids (EAA), eight free non-essential amino acids (NEAA) and eleven other amino acids (OAA); for R. bullata eight EAA, eight NEAA and eight OAA were detected. Aspartic acid is the major constituent for both species. The total protein percents were determined for N. spongiaeforme as % 19.83 and for R. bullata as % 6.15. When considering the increasing world population and reducing natural products; Cyanobacteria will benew feed sources for all living.Öğe Biosorption of heavy metal ions from aqueous solutions by nonliving Scenedesmus quadricauda biomass(2012) Akgül, Riza; Kizilkaya, Bayram; Akgül, Füsun; Do?an, FatihIn present study, biosorptions of lead (II), cadmium (II), cobalt (II) and chromium (III) ions from water were studied and dead algae biomass (Scenedesmus quadricauda Chodat) was used as natural and biological sorbents. The effects of pH, contact time and metal concentration on the biosorption capacity were investigated. The maximum biosorption capacities for Co (II), Cr (III), Cd (II) and Pb (II) were found to be 32.8, 20.3, 63.9 and 123.0 mg/g, respectively. The experiments showed that when pH increased, an increase in the biosorption capacity of the biomass was observed. Freundlich and Langmuir isotherm models were applied to experimental equilibrium data of metal ions adsorption and the value of RL for Co (II), Cr (III), Cd (II) and Pb (II) was found to be 0.639, 0.580, 0.915 and 0.949, respectively. The algae biomass was effectively used as a sorbent for removal of metal ions from aqueous solutions. © by PSP.Öğe Çanakkale (Marmara bölgesi, Türkiye) ve çevresindeki iç sulardan izole edilen mikroalglerin moleküler karakterizasyonu(Çanakkale Onsekiz Mart Üniversitesi Fen Bilimleri Enstitüsü, 2014) Akgül, Füsun; Erduğan, HüseyinBu çalışmada Çanakkale (Marmara Bölgesi, Türkiye) ve çevresindeki iç sulardan mikroalgler izole edilip kültüre alınmıştır. Mevcut literatürler yardımıyla morfolojik tayinleri yapıldıktan sonra moleküler sistematik ile türlerin doğruluğu ve filogenetik ilişkileri araştırılmıştır. Türkiye iç sularına ait mikroalglerin özellikle ekonomik-ticari öneme sahip olan türlerin belirlenmesi ve bu mikroorganizmalar ile ilgili taksonomik yanılgıların ortadan kaldırılması sağlanmıştır. Çalışmada toplanan mikroalg örneklerinden elde edilen DNA'lar ile polimeraz zincir reaksiyonu (PZR) analizi gerçekleştirilmiş, elde edilen ITS bölgelerinin dizi analiziyle baz dizilimleri belirlenerek filogenetik analizleri yapılmıştır. Morfolojik olarak tayin edilen mikroalg türlerinin tayinlerinin doğruluğu ve türlerin akrabalıkları araştırılmıştır. Çalışma boyunca Cyanobacteria, Heterokontophyta ve Chlorophyta gruplarından 24 takson elde edilmiştir. Bunlardan 18 örneğin dizi analizi yapılmış ve NCBI verileri ile hizalanmış ve bu örneklere ait katılım numaraları NCBI'dan alınmıştır. 11 örneğin morfolojik gözlem sonuçları ile BLAST sonuçları cins bazında benzerlik gösterirken, 7 örnekte böyle bir benzerlik yakalanamamıştır. Bu sonuç, mikrolaglerin sistematik karakterizasyonu yapılırken sadece morfolojik verilerin kullanılmasının yetersiz kalacağını bu verilerle birlikte moleküler tekniklerin de kullanılmasının gerektiğini göstermektedir.Öğe Crude protein values and amino acid profiles of some red algae collected from Çanakkale(National Institute of Science Communication and Policy Research, 2015) Akgül, Rıza; Kızılkaya, Bayram; Akgül, Füsun; Ormancı, Hasan BasriPresent study consists the total protein values and amino acids components of the some red algae, collected from coastal zones of the Dardanelles and inland water. Crude proteins of samples were determined by the Kjeldahl method and were calculated using a nitrogen conversion factor of 6.25. Levels of amino acids were measured in algae samples using gas chromatography. Total protein contents were 36.72% in Batrachospermum gelatinosum (Linnaeus) De Candolle, 32.3% in Ceramium rubrum var. barbatum G. Feldmann-Mazoyer, 27.84% in Lemanea fluviatilis (Linnaeus) C. Agardh and 19.5% in Phyllophora crispa (Hudson) P.S. Dixon. In all, thirty two amino acids were identified and estimated. Analysis revealed the presence of eight free essential, nine free non essential and fifteen other amino acids. Aspartic acid was the major constituent in all the samples. Kinds and percentage of amino acids vary according to algae. © 2015, National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved.Öğe Ergene Havzası (Trakya, Türkiye) iç sularından izole edilen bazı mikro alglerin moleküler sistematiği(2013) Erduğan, Hüseyin; Akgül, Rıza; Akgül, Füsun[Abstract Not Available]Öğe Evaluation of environmental degradation in the Karamenderes River in relation to anthropogenic stressors(Parlar Scientific Publications (P S P), 2009) Koçum, Esra; Akgül, FüsunNutrient concentrations and phytoplankton biomass were monitored with reference to several anthropogenic pressures in the Karamenderes River (Canakkale, NW Turkey) and in its catchment through a seasonal sampling program of three sites. Both spatial and temporal variations in chl a, nitrate and nitrite and temporal variation in ammonium, phosphate and silicate were significant. Despite intense application of chemical fertilizers in agricultural areas within the catchment and elevated riverine nitrate concentrations phosphate levels were low, potentially keeping chl. a levels in oligotrophic range. Considering the important role of phosphorus in freshwater eutrophication and complex dynamics of phosphorus leaching from soil, the healthy functioning of this ecosystem critically depends on management plans that consider the long term risks associated with phosphate transfer from agricultural soils into the river.Öğe Total lipid and fatty acid composition of Twelve Algae from Çanakkale (Turkey)(National Institute of Science Communication and Policy Research, 2015) Akgül, Rıza; Kizilkaya, Bayram; Akgül, Füsun; Erduğan, HüseyinThe total lipid and fatty acid methyl esters composition of the some algae collected from coastal zones of the Çanakkale were determined by Folch method. This method is a conventional lipid extraction procedure using the solvent, chloroform: methanol (2:1 v/v). Fatty acid analyses were made by using gas chromatography. Total lipid percentages ranged from 2.02% (dry weight algae: d.w.) in Lemanea fluviatilis to 9.56% (d.w.) in Batrachospermum gelatinosum. Presence of 33 fatty acids was revealed, of which 13 were saturated and 20 were unsaturated. Nine of unsaturated were monounsaturated and eleven of them were polyunsaturated fatty acids. The major fatty acids identified were palmitic (16:0) and oleic acid (C18:1n9). For the ratio unsaturated/ saturated; Lemanea fluviatilis (2.24) has the highest value and then Dictyota implexa (1.78), Cystoseira barbata (1.59), respectively. Phyllophora crispa has the highest total ?-3 (19.28%), ?-6 (16.6%) and Lemanea fluviatilis has the highest ?-9 (66.01%) values in total fatty acids. © 2015, National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved.
