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Journals / Recep Tayyip Erdoğan Üniversitesi Fen ve Mühendislik Bilimleri Dergisi / 2025 / Cilt: 6 Sayı: 3

Determination of the Yield and Characterization of Alginate Obtained Using Different Methods from the Brown Alga Cystoseira sp. Harvested from the Southern Coast of the Black Sea

Güney Karadeniz Kıyısından Hasat Edilen Cystoseira sp. Kahverengi Alginden Farklı Metotlar Kullanılarak Elde Edilen Alginatın Verim ve Karaterizasyonunun Belirlenmesi

Neslihan Öğretmen(RECEP TAYYİP ERDOĞAN ÜNİVERSİTESİ)0009-0003-3709-2447
Emre Çağlak(RECEP TAYYİP ERDOĞAN ÜNİVERSİTESİ)0000-0002-7376-1359
Özen Yusuf Öğretmen(RECEP TAYYİP ERDOĞAN ÜNİVERSİTESİ, SU ÜRÜNLERİ FAKÜLTESİ)0000-0002-1767-2693
Pages
841–851
Publication Date
2025-12-31
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

According to the results, the highest viscosity (18.75±0.35 mPAS) and gel strength (425.00±14.14 g) values were obtained from the alginate extracted using the magnetic stirrer method.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, alginate was extracted from the brown seaweed species Cystoseira sp. using different extraction methods, including ultrasonic bath, magnetic stirrer, and sonic bath, and the resulting samples were compared with commercial alginate.
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Key Findings & Data:The obtained alginates were characterized in terms of yield, viscosity, gel strength, pH, moisture, and ash content.
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Conclusion & Impact:According to the results, the highest viscosity (18.75±0.35 mPAS) and gel strength (425.00±14.14 g) values were obtained from the alginate extracted using the magnetic stirrer method.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:Alginat · Cystoseira sp. · ekstraksiyon yöntemi

Abstract

In this study, alginate was extracted from the brown seaweed species Cystoseira sp. using different extraction methods, including ultrasonic bath, magnetic stirrer, and sonic bath, and the resulting samples were compared with commercial alginate. The obtained alginates were characterized in terms of yield, viscosity, gel strength, pH, moisture, and ash content. Additionally, their chemical structures were investigated using Fourier Transform Infrared Spectroscopy (FT-IR). According to the results, the highest viscosity (18.75±0.35 mPAS) and gel strength (425.00±14.14 g) values were obtained from the alginate extracted using the magnetic stirrer method. All alginate samples exhibited basic pH values ranging from 9.15 to 9.78, while the commercial alginate had a more acidic pH of 6.13±0.02. The highest moisture content (23.10%) was observed in the alginate extracted by ultrasonic bath, whereas the lowest (19.37%) was found in the sample obtained via sonic bath. All extraction methods yielded alginate samples with higher ash content than the commercial counterpart. FT-IR spectra revealed that all samples contained the characteristic functional groups of alginate and showed structural similarities. These findings suggest that the extraction method significantly affects the physicochemical properties of alginate, and selecting the appropriate method is critical depending on the intended application. In particular, the magnetic stirrer method appears to be promising for producing high-functionality alginate.

Özet

Bu çalışmada, Cystoseira sp. türü kahverengi deniz yosunundan ultrasonik banyo, manyetik karıştırıcı ve sonik banyo gibi farklı ekstraksiyon yöntemleri kullanılarak alginat elde edilmiş ve bu örnekler ticari alginat ile karşılaştırılmıştır. Elde edilen alginatlar; verim, viskozite, jel gücü, pH, nem ve ham kül içerikleri açısından karakterize edilmiş, ayrıca kimyasal yapıları FT-IR (Fourier Dönüşümlü Kızılötesi Spektroskopi) analizi ile incelenmiştir. Analiz sonuçlarına göre, en yüksek viskozite (18.75±0.35 mPAS) ve jel gücü (425.00±14.14 g) değerleri manyetik karıştırıcı yöntemi ile elde edilen alginatta gözlemlenmiştir. Tüm yöntemlerle elde edilen alginatlar bazik pH aralığında yer almakta olup (9.15–9.78), ticari alginat ise 6.13±0.02 pH değeriyle daha asidik bir karakter göstermektedir. En yüksek nem oranı %23.10 ile ultrasonik banyo yöntemiyle elde edilen alginatta, en düşük nem oranı ise %19.37 ile sonik banyo yöntemiyle elde edilen alginatta tespit edilmiştir. Ham kül içeriği bakımından laboratuvar ortamında elde edilen tüm alginatlar, ticari ürüne göre daha yüksek değerler sergilemiştir. FT-IR spektrumları, tüm örneklerin alginatın karakteristik fonksiyonel gruplarını içerdiğini ve yapısal benzerlik taşıdığını ortaya koymuştur. Elde edilen bulgular, ekstraksiyon yönteminin alginatın fizikokimyasal özellikleri üzerinde belirgin bir etkisi olduğunu ve üretim hedeflerine göre uygun yöntemin seçilmesinin kritik önem taşıdığını göstermektedir. Özellikle manyetik karıştırıcı yöntemi, yüksek fonksiyonellikte alginat üretimi açısından umut vadetmektedir.

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Cite This Article

Öğretmen, N., Çağlak, E., Öğretmen, Ö. Y. (2025). Determination of the Yield and Characterization of Alginate Obtained Using Different Methods from the Brown Alga Cystoseira sp. Harvested from the Southern Coast of the Black Sea. Recep Tayyip Erdoğan Üniversitesi Fen ve Mühendislik Bilimleri Dergisi, Cilt: 6 Sayı: 3, 841–851. https://doi.org/10.53501/rteufemud.1754349

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