Fatma Seyyar’s scientific contributions

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Publications (3)


Extraction and Physicochemical Characterization of Chitin from Galeodes araneoides (Pallas, 1772) (Arachnida: Solifugae)
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October 2024

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31 Reads

Commagene Journal of Biology

Dilek Demirtaş

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Fatma Seyyar

: Chitin is a biomaterial which has a high potential of use in many areas of technology. It is found as a structural material in the outer skeletons of arthropods, the cell walls of mushrooms, and the shells of marine invertebrates. Chitin is the most abundant biopolymer in nature after cellulose and contains nitrogen in its structure. In recent years, apart from traditional chitin sources, insects, arachnids, coral/crustacean eggs and even bat guano have been reported as alternative chitin sources. In this study, chitin was first extracted from external skeleton of a solifugids species, Galeodes araneoides (Pallas, 1772) and the isolated chitin was characterized by SEM, FTIR, XRD, and TGA. The obtained chitin has been found to have high thermal stability, nanofiber and nanoporous surface, and alpha form and it is suggested that it can be an alternative chitin source.

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A New Type Covering Setae Morphology in Crab Spiders (Araneae)

September 2024

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28 Reads

Commagene Journal of Biology

Husnidil Baltayeva

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Fatma Seyyar

The present study aims to determine the covering setae in the two crab spiders using scanning electron microscopy (SEM). The setae on the prosoma of Runcinia grammica (C. L. Koch, 1837) and Thomisus onustus Walckenaer, 1805 were examined. This study reveals the existence of a new type of covering setae in Thomisidae group.


Galeodes araneoides (Pallas, 1772) (Arachnida: Solifugae) türünün Keliserlerindeki Patojenik Bakteriler Üzerine Bir Çalışma

May 2024

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7 Reads

Nevşehir Bilim ve Teknoloji Dergisi

Bu çalışmanın hedefi, böğülerin keliserlerinde mikroorganizmaların var olup olmadığını araştırmak, eğer varsa bu mikroorganizmaların tıbbi öneme sahip patojen mikroorganizmalar olup olmadıklarını belirlemektir. Bu amaçla, Galeodes araneoides (Pallas, 1772) türüne ait 14 böğü örneğinin keliserlerinden sürüntü yöntemiyle örnekler alınmıştır. Bakteri üremesi görülen mikrobiyolojik kültürlerden bakteri izolasyonu yapılarak Matriks Destekli Lazer Dezorpsiyon İyonlaştırma Uçuş Zamanı Kütle Spektrometrisi (MALDI-TOF MS) yöntemi kullanılarak bu bakteriler tanımlanmıştır. Tanımlama işlemi sonucunda 13 farklı bakterinin, Galeodes araneoides (Pallas, 1772) türünün keliserlerinde olduğu tespit edilmiş olup bunlardan 10 tanesinin patojen bakteri olduğu belirlenmiştir. Bu çalışma böğülerin keliserlerinde patojen bakterilerin varlığını ortaya koyan ilk çalışmadır.