Journals / El-Cezeri / 2019 / Cilt: 6 - Sayı: 3

Structural and Rheological Properties of Gelatin-Carrageenan Mixtures

Jelatin ve Karagenan Karışımlarının reolojik ve yapısal analizleri

Journal
El-Cezeri
Pages
525–532
Publication Date
2019-09-30
DOI
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AI Summary & Key Takeaways

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

Strengthening of gel network structures were also confirmed using SEM analysis of G-CR mixtures.

📌 3 Key Takeaways

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Objective & Hypothesis:Rheological steady shear and dynamical measurement of gelatin-carragenan (G-CR) 1%, w/v mixtures at mixing ratios of 1:1 and 2:1at pH 7.0 were performed using stress controlled rheometer.
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Key Findings & Data:The results reveal that Herschel-Bulkley (HB) rheological flow model gives the best fit (R2=0.993) to capture the flow characteristics of highly yielding G-CR mixtures.
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Conclusion & Impact:Strengthening of gel network structures were also confirmed using SEM analysis of G-CR mixtures.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Reolojik Ölçümler · Rheological measurements

Abstract

Rheological steady shear and dynamical measurement of gelatin-carragenan (G-CR) 1%, w/v mixtures at mixing ratios of 1:1 and 2:1at pH 7.0 were performed using stress controlled rheometer. The results reveal that Herschel-Bulkley (HB) rheological flow model gives the best fit (R2=0.993) to capture the flow characteristics of highly yielding G-CR mixtures. Carrageenan improves the gel strength of the mixture due to moving towards more elastic modulus (order of G’≈103) as compared to gelatin elastic modulus (order of G’≈10). At 1.0 % of gum concentration, 2:1 of gum ratio, 13 oC of temperature, and pH of 7.0, the gel strength texture for G-CR mixtures were found to be as 4.71 N. Strengthening of gel network structures were also confirmed using SEM analysis of G-CR mixtures.

Özet

Bu çalışmada, kütlece %1’lik jelatin-karagenan (G-CR) karışımının hacimce 1:1 ve 2:1 oranlarında pH 7.0 de stres kontrollü reometre ile reolojik yatışkın kayma ve dinamik ölçümleri yapılmıştır. Sonuçlar, gayet yüksek eşik stresine sahip G-CR karışımları için en yüksek tahmin katsayısı veren (R2=0.993) Herschel-Bulkley (HB) reolojik akış modeline göre uyum göstermektedir. Karagenan, jelatine göre (G’≈10) daha yüksek mertebeli (G’≈103) elastik modüle sahip olduğundan, G-CR karışımına CR katkısının jel dayanımını arttırdığı gözlenmiştir. Karışımdaki , 2:1 karışım oranında 13 oC ve pH 7 de, jel dayanımı tekstür cihazı ile 4.71 N olarak bulunmuştur. Ayrıca, bu çalışmada jel ağlarındaki mukavemet artışı jellerin SEM analizleri ile desteklenmiştir.

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Cite This Article

TEZEL, G. B., UZUNER, S., EVRENDILEK, G. A. (2019). Structural and Rheological Properties of Gelatin-Carrageenan Mixtures. El-Cezeri, Cilt: 6 - Sayı: 3, 525–532. https://ajindex.com/articles/252231

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