Bülent Akar

• PhD
• Gümüşhane University

In the field of environmental pollution removal, bioremediation plays a crucial role in removing or converting toxic substances from the environment. Bacteria, yeasts, molds, algae, and plants are widely used in bioremediation events. Recently, green-synthesized nanoparticles have also been employed in bioremediation applications. In this study, ir...

z Bu çalışmanın amacı, ateş dikeni meyvelerinden yeşil sentez yolu ile elde edilmiş metal nanopartiküllerin biyolojik aktivitesini belirlemektir. Gümüşhane Üniversitesi kampüsünde peyzaj amacıyla yetiştirilen ateş dikeni bitkisinin (Pyracantha coccinea) meyve ve tohumlarından elde edilen ekstraktlardan demir nanopartikülleri (Fe-NP) sentezlenmiştir...

In this study, the physicochemical properties and antioxidant activities of the commercially produced 15 pomegranate sour samples and one control sample were determined and their compliance with the TS 12720 (traditional sour pomegranate concentrate standard) was evaluated. Antioxidant activity values of pomegranate sours extracts were determined u...

Peatlands are one of the globally important ecosystems. Blanket bogs are a type of peatlands where water is generally supplied by meteorological events (rain, snow). We have been conducting the first detailed algal flora study of blanket bogs of Turkey and found new records of algae genera ever given for Turkey. Here, we report a total of four desm...

In this study, it was aimed to determine the physical, chemical and antioxidant properties of pomegranate sauces sold in the market in Turkey. A total of 18 pomegranate sauces were studied; 17 of which were purchased from the market, and one of them was produced in a rotary evaporator in the laboratory. For each sample, analysis of antioxidant acti...

In the study, the phenolic components and antioxidant activities of edible and nonedible parts of tuber of Arum italicum plant were carried out to determine in methanolic and water extracts. In addition, the antioxidant potential of these parts of the plant was associated with their phenolic composition. Total phenolic content, FRAP, CUPRAC and DPP...

Abstract: The object of the present study was to investigate the antioxidant, antimicrobial activity and phenolic compounds of fruit and seeds of Diospyros lotus L. The fruits consumed by humans as nutrients were harvested from the plants that grow naturally in the province of Trabzon-Akçaabat, Eastern Black Sea Region of Turkey. The antioxidant ac...

The first results of bioindicative analysis of water quality in the high-mountainous lakes of the Artabel Lakes Natural Park are presented using diatom species. A total of 95 diatom taxa collected in August 2013 and 2016 were identified and used as bioindicators for ten environmental variables. Bioindication, statistical methods and comparative flo...

The composition of charophyte taxa and their habitat preferences in water bodies of the Artabel Lakes Nature Park were investigated on 15 August 2013 and 13 August 2016. A total of 73 taxa belonging to Conjugatophyceae (Zygnematophyceae) and Klebsormidiophyceae were recorded. The genera Cosmarium (37), Staurastrum (10) and Closterium (7) were most...

Abstract: The algal flora of 17 lakes and 1 pond in the Artabel Lakes Nature Park were investigated during two summer seasons (2013 and 2016). In total, 26 desmid taxa were found and identified as new records for the desmid flora of Turkey based on their morphotaxonomic characteristics and ecological preferences. The taxa identified belong to the g...

Algae contain a large amount of biological active compounds functioning as antioxidant, antimicrobial and anti-tumour. In the present research, antioxidant activity of fresh-water alga Microspora sp. (Chlorophyta) extract prepared in different solvents (metha-nol, acetonitrile, ethanol, acetone and ethyl acetate) was determined with three differ-en...

Six newly recorded taxa, Chlamydomonas pertusa Chodat, Coenochloris pyrenoidosa Korshikov, Coenocystis tapasteana Komárek, Katagnymene accurata Geitler, Phormidium stagninum Anagnostidis, and Scytonema coactile Montagne ex Bornet & Flahault, were described from epipelic, epilithic, and epiphytic materials of the 17 high mountain lakes and a pond in...

The species composition of benthic diatoms of 18 selected high mountain lakes in the Artabel Lakes Nature Park of Turkey were investigated (on 15 August 2013 and on 13 August 2016). In all, 95 species of diatoms belonging to 46 genera were recorded. The most species rich genera are Pinnularia (15), Eunotia (6) and Gomphonema (6), while other genera...

This study was carried out in 17 high mountain lakes and a pond in the Artabel Lakes Nature Park (Gümüşhane) on August 15, 2013 and August 13, 2016. In the present study, epipelic, epilitic and epiphytic algal flora of lakes were determined and a total of 95 taxa were recorded belonging to Bacillariophyta division. 9 of the taxa belonging to Bacill...

Comparison of Antioxidant Contents of Different Solvent Extracts From a Freshwater Algal Species

The main goal of this study is to determine the composition, diversity and ecology of benthic diatoms in Karagöl Lake in Karagöl-Sahara National Park. Monthly sampling (from sediments, stones and aquatic plants in littoral zone of the lake) taken in three consecutive years revealed 57 diatom taxa with Gomphonema and Pinnularia being the most abunda...

Benthic algal flora of Karagöl Lake, its seasonal variation, and the physical and chemical parameters of the water were studied between October 2008 and September 2010. The algal flora consisted of 112 taxa belonging to the divisions Charophyta (41), Chlorophyta (33), Cyanobacteria (18), Euglenozoa (17), Miozoa (2), and Ochrophyta (1). Six desmid t...

The benthic algal flora of Karagol Lake (Savsat, Artvin) was investigated between October 2008 and September 2010. Actinotaenium diplosporum var. americanum, Cosmarium pseudoexiguum, Gonatozygon kinahanii, Staurastrum boreale var. quadriradiatum, S. hantzschii and Staurodesmus dejectus var. apiculatus were recorded for the first time for the desmid...

Libodom Göleti epipelik alglerinin kompozisyonu, mevsimsel değişimleri ve gölet suyunun fiziksel ve kimyasal özellikleri Temmuz 2009-Haziran 2010 tarihleri arasında periyodik olarak incelenmiştir. Arazi ve laboratuar çalışmaları Round (1953)’un yöntemi esas alınarak yapılmıştır. Libodom Göleti’nin epipelik alg florasını tespit etmek, Türkiye Tatlıs...

The seasonal variaton in the species composition of the benthic algae of Salyazı pond were investigated between May and November 2008. The benthic algal flora consisted of 83 taxa belonging to the Ochrophyta, Chlorophyta, Charophyta, Cyanobacteria, Euglenozoa and Myzozoa. Ochrophyta were dominant in terms of species numb r and abundance during the...

The species composition and diversity of the epipelic algae of Bali{dotless}k Lake were investigated between May and October 2008. A total of 39 taxa were determined, and Cyclotella meneghiniana, Craticula cuspidata, Closterium strigosum, Cocconeis placentula var. euglypta, and Amphora ovalis were the most conspicuous algae, regarding frequency of...

A floristik study of desmids which were found in the epipelic and epilithic habitats of the 7 high mountain lakes, all situated in the Eastern Black Sea region of Turkey, is presented. A total of 55 desmid taxa of 12 genera belonging to 3 families were identified. Ten taxa are new records for the Turkey's desmid flora.

The seasonal variations in composition and density of benthic algae of Karanlik Lake, and diversity of epipelic algae, have been investigated in 2001 and 2002. A total of 86 taxa were determined, and Cymbella minuta, Pinnularia maior and Surirella splendida were the most conspicuous algae, regarding frequency of occurrence and relative abundance in...

The epipelic and epilithic algae of Küçükgöl Lake were studied between June and September 2002. Fifty-five taxa (26 belonging to Bacillariophyta, 23 to Chlorophyta, 3 to Cyanophyta and 3 to Euglenophyta) were determined. Closterium lunula var. biconvexum, Cosmarium asphaerosporum var. strigosum, C. garrolense, C. rectangulare, Euastrum ansatum var....