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- MakaleAçık Erişim2023The Antioxidant Capacities and Antimicrobial Activities of Some Salvia L. Seeds
Ökkeş; Yılmaz, Okkes; Yilmaz; Kurşat, Murat; Kirbag, Sevda; Civelek, Şemsettin; Emre, Irfan; Sönmez, Pınar Erecevıt; Emre, Mustafa Yunus
The goal of present study is to find the penolic contents, antioxidant activities and antimicrobial capacities in the seeds of five Salvia L. taxa two of which are endemics (Salvia euphratica var. leiocalycina and Salvia euphratica var. euphratica). The flavonoid and phenolic acid are determined by using HPLC while the antioxidant activities are determined based on different methods. Also, the antimicrobial activities of some Salvia species are determined by using the well agar method. The current study found that the studied Salvia species have low flavonoid. It has been found that Salvia euphratica var. euphratica has high vanillic acid, ferulic acid and rosmarinic acid among the studied taxa. Similarly, it has been found that Salvia euphratica var. euphratica has high DPPH and ABTS radical scavening capacity in all concentrations. It has been also found that Salvia euphratica var. euphratica has highest total phenolic content (372,63±0,87 µgGAE/mg) whilst Salvia tricholoda has low total phenolic content (46,41±1,71 µgGAE/mg). In addition, this study demonstrated that Salvia tricholoda has lowest metal chelating activity (37,35±0,51%). Furthermore, present study found that the lipid peroxidation levels of the studied Salvia taxa are between 18,21±0,37 mg/kg and 21,03±0,22 mg/kg while it has been found that the antibacterial properties of the Salvia taxa under study are altering.
AtıfOpenAlex1TR Dizin1
İncele - MakaleAçık Erişim2022Bazı Dicranum Hedw. Türlerinin Biyokimyasal Özellikleri
Alataş, Mevlüt; Batan, Nevzat; Ökkeş; Yılmaz, Okkes; Yilmaz; Emre, Irfan; Demirbağ, Mustafa; Yıldırım, Vesile
Bu çalışmada, beş farklı Dicranum türünün (D. majus, D. fuscencens, D. polysetum, D. scoparium ve D. tauricum) yağ asidi bileşimleri, yağda çözünen vitaminler, steroller, flavonoidler ve fenolik asit seviyeleri ile DPPH radikal yakalama aktiviteleri incelenmiştir. Yağda çözünen vitaminler, steroller, flavonoidler ve fenolik asitler HPLC ile değerlendirilirken, yağ asidi bileşimleri gaz kromatografisi ile değerlendirilmiştir. Çalışma bulgularına dayanarak, incelenen Dicranum türlerinin düşük düzeyde flavonoidler ve yağda çözünen vitaminler sergiledikleri belirlenmiştir. Fakat incelenen türlerin fenolik asitler açısından yüksek olduğu görülmüştür. Özellikle incelenen türlerin önemli düzeyde gallik asit (52,96-63,1 g/g) ve vanilik asit (11,96-44,83 g/g) içerdiği belirlenmiştir. Sinnamik asit konsantrasyonu ise incelenen örneklerde en düşüktür. Bu çalışmada incelenen türlerin radikal yakalama kapasiteleri 250 μl'de %48,92 ile %86,89 arasında değişmektedir. Ayrıca incelenen türlerin stigmasterol içeriklerinin 35,3 ile 46,05 g/g arasında değiştiği saptanmıştır. En düşük ergosterol ve beta-sitosterol seviyeleri ise D. majus ve D. fuscescens'te bulunmuştur. Yağ asidi bileşimi sonuçlarına göre; oleik asit (C18:1 n9), linoelik asit (C18:2 n6) ve -linolenik asit (C18:3 n3)'ün baskın doymamış yağ asitleri, palmitik asit (C16:0) ve behenik asit (C22:0) ise başlıca doymuş yağ asitleridir.
AtıfOpenAlex6TR Dizin2İncele - MakaleAçık Erişim2021The antioxidant and antimicrobial capacities of phenolic profiles of some Salvia L. Seeds grown in Turkey
Emre, Irfan; Kursat, Murat; Kirbag, Sevda; Erecevit, Pinar; Emre, Mustafa Yunus; Yilmaz, Okkes; Civelek, Semsettin
The aim of current study is to show phenolics, antioxidant capacities and antimicrobial activities of seeds of five Salvia L. (S. frigida Boiss., S. candidissima subsp. candidissima Vahl., S. virgata Jacq., S. verticillata L. var. verticillata and S. russellii Benth.) taxa grown in Turkey. The flavonoid and phenolic acid contents were measured by using HPLC whilst the antioxidant capacities were determined by using different methods. In addition, agar well diffusion method was used to determine the antimicrobial activities of Salvia species in this study. It was found that S. frigida, S. verticillata var. verticillata and S. russellii have the highest catechin contents and S. frigida and S. verticillata var. verticillata have high rosmarinic acid while S. frigida, S. candidissima subsp. candidissima and S. verticillata var. verticillata have high vanilic acid. Also, it was determined that S. frigida and S. verticillata var. verticillata have high DPPH radical scavenging activities in 150 and 250 µL while S. frigida and S. verticillata var. verticillata have highest ABTS radical scavenging activity in all concentrations apart from 25 µL for S. frigida. Furthermore, S. frigida and S. verticillata var. verticillata have high total phenolic contents. On the other hand, Salvia species have similar lipid peroxidation inhibitions. However, the metal chelating activities of Salvia species are different. And also, it was demonstrated that Salvia taxa have antimicrobial activity.
AtıfScopus7OpenAlex7TR Dizin2
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