The Effect of Extraction Conditions on Chemical and Thermal Characteristics of Kappa-Carrageenan Extracted from Hypnea bryoides
المؤلفون المشاركون
Al-Alawi, Ahmed
Al-Marhobi, Insaaf
Al-Nahdi, Zainab Mohammed
المصدر
العدد
المجلد 2019، العدد 2019 (31 ديسمبر/كانون الأول 2019)، ص ص. 1-10، 10ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2019-08-01
دولة النشر
مصر
عدد الصفحات
10
التخصصات الرئيسية
الملخص EN
Hypnea bryoides collected from the Arabian Sea on the southern coast of Oman was investigated for κ-carrageenan optimal extraction conditions.
The effects of different conditions of alkali treatment (4, 6, and 8% w/v NaOH), temperatures (70, 75, and 80°C), and time (2, 2.75, 3.5 hours) on carrageenan yield and chemical and thermal properties were evaluated.
Yield was significantly affected by alkaline concentration and temperature, with highest value of 26.74 ± 5.01%.
Molecular weights of the extracted carrageenan were significantly reduced by increased temperatures and ranged from 5.95 ± 0.49 × 105 Da to 13.90 ± 0.14 × 105.
FTIR showed that samples under all extraction conditions were similar and confirmed the presence of κ-carrageenan with no traces of μ-precursor.
Sulfate content was also significantly reduced by alkaline concentration (from 4% to 6%) and ranged from 7.62 ± 5.52% to 17.02 ± 0.14.
Thermal properties showed more sensitivity towards temperature and alkaline strength parameter than time.
In addition, melting and gelling temperatures were significantly correlated with the molecular weight, but not sulfate content.
In conclusion, mild extraction conditions were found to be more efficient in introducing the intended structural modification while getting the highest yield and quality.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Al-Nahdi, Zainab Mohammed& Al-Alawi, Ahmed& Al-Marhobi, Insaaf. 2019. The Effect of Extraction Conditions on Chemical and Thermal Characteristics of Kappa-Carrageenan Extracted from Hypnea bryoides. Journal of Marine Sciences،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1181461
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Al-Nahdi, Zainab Mohammed…[et al.]. The Effect of Extraction Conditions on Chemical and Thermal Characteristics of Kappa-Carrageenan Extracted from Hypnea bryoides. Journal of Marine Sciences No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1181461
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Al-Nahdi, Zainab Mohammed& Al-Alawi, Ahmed& Al-Marhobi, Insaaf. The Effect of Extraction Conditions on Chemical and Thermal Characteristics of Kappa-Carrageenan Extracted from Hypnea bryoides. Journal of Marine Sciences. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1181461
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1181461
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر