Ionic studies of sodium alginate isolated from Sargassum terravium (brown algea) karachi coast with 2,1-electrolyte
المؤلفون المشاركون
Siddique, Azhar
Mahmud, Sayyid Junid
المصدر
Journal of Saudi Chemical Society
العدد
المجلد 14، العدد 1 (31 مارس/آذار 2010)، ص ص. 117-123، 7ص.
الناشر
تاريخ النشر
2010-03-31
دولة النشر
السعودية
عدد الصفحات
7
التخصصات الرئيسية
الموضوعات
الملخص EN
Physical and chemical analysis of the polysaccharide isolated from Sargassum Terrarium (brown algae) of Karachi coast showed characteristics of the sodium alginate.
Optical rotations and sulphated ash content were found and FTIR spectra showed a sharp and strong absorption band at 1600 cm-1 representing carboxylate ion which conforms high uronic acid content of the product.
The viscosities of aqueous 0.1% sodium alginate solution were measured in the presence of copper II chloride (CuCl2).
The viscosities were found to be increased with the increase in the concentration of electrolyte.
Viscosities were also found affected with temperature.
'A' and 'B' coefficients of Jones-Dole equation were evaluated.
The increase in positive values of 'F coefficient with the rise of temperature led to conclusion that given electrolyte in 0.1% aqueous sodium alginate solution behaves as structure maker.
Thermodynamic parameters regarding to activated state like energy of activation En, change in free energy of activation ΔGn, and change of entropy of activation ΔSn, were also evaluated.
Straight-line plots of log n versus 1 / T observed with positive slopes show the effect of temperature on the viscosities of solutions.
Energy of activation (ΔGn) was found to be decreased with the rise of temperature.
Change in free energy of activation (ΔGn,) was also found to be increased with increase in concentrations of electrolyte and also with rise of temperature.
The values of change in entropy of activation (ΔS,) were also calculated.
Negative values of ΔSn, were found to be increased with increase in concentration of electrolyte and also with rise of temperature.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Mahmud, Sayyid Junid& Siddique, Azhar. 2010. Ionic studies of sodium alginate isolated from Sargassum terravium (brown algea) karachi coast with 2,1-electrolyte. Journal of Saudi Chemical Society،Vol. 14, no. 1, pp.117-123.
https://search.emarefa.net/detail/BIM-250731
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Mahmud, Sayyid Junid& Siddique, Azhar. Ionic studies of sodium alginate isolated from Sargassum terravium (brown algea) karachi coast with 2,1-electrolyte. Journal of Saudi Chemical Society (Mar. 2010), pp.117-123.
https://search.emarefa.net/detail/BIM-250731
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Mahmud, Sayyid Junid& Siddique, Azhar. Ionic studies of sodium alginate isolated from Sargassum terravium (brown algea) karachi coast with 2,1-electrolyte. Journal of Saudi Chemical Society. 2010. Vol. 14, no. 1, pp.117-123.
https://search.emarefa.net/detail/BIM-250731
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references : p. 123
رقم السجل
BIM-250731
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