Rheological Modeling and Characterization of Ficus platyphylla Gum Exudates
Ficus platyphylla gum exudates (FP gum) have been analyzed for their physicochemical parameters and found to be ionic, mildly acidic, odourless, and yellowish brown in colour. The gum is soluble in water, sparingly soluble in ethanol, and insoluble in acetone and chloroform. The nitrogen (0.39%) and...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2013-01-01
|
| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2013/254347 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832556036035182592 |
|---|---|
| author | Nnabuk O. Eddy Paul O. Ameh Casimir E. Gimba Eno E. Ebenso |
| author_facet | Nnabuk O. Eddy Paul O. Ameh Casimir E. Gimba Eno E. Ebenso |
| author_sort | Nnabuk O. Eddy |
| collection | DOAJ |
| description | Ficus platyphylla gum exudates (FP gum) have been analyzed for their physicochemical parameters and found to be ionic, mildly acidic, odourless, and yellowish brown in colour. The gum is soluble in water, sparingly soluble in ethanol, and insoluble in acetone and chloroform. The nitrogen (0.39%) and protein (2.44%) contents of the gum are relatively low. The concentrations of the cations were found to increase according to the following trend, Mn>Fe>Zn>Pb>Cu>Mg>Cd>Ca. Analysis of the FTIR spectrum of the gum revealed vibrations similar to those found in polysaccharides while the scanning electron micrograph indicated that the gum has irregular molecular shapes, arranged randomly. The intrinsic viscosity of FP gum estimated by extrapolating to zero concentrations in Huggins, Kraemer, Schulz-Blaschke, and Martin plots has an average value of 7 dL/g. From the plots of viscosity versus shear rate/speed of rotation and also that of shear stress versus shear rate, FP gum can be classified as a non-Newtonian gum with characteristics-plastic properties. Development of the Master_s curve for FP gum also indicated that the gum prefers to remain in a dilute domain (C<C∗), such that 𝜂sp𝛼C1.2. The apparent activation energy of flow for FP gum (calculated from Arrhenius-Frenkel-Eyring plot) was relatively low and indicated the presence of fewer inter- and intramolecular interactions. |
| format | Article |
| id | doaj-art-03db34a4063547cdb0f79e2a1699148b |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-03db34a4063547cdb0f79e2a1699148b2025-02-03T05:46:28ZengWileyJournal of Chemistry2090-90632090-90712013-01-01201310.1155/2013/254347254347Rheological Modeling and Characterization of Ficus platyphylla Gum ExudatesNnabuk O. Eddy0Paul O. Ameh1Casimir E. Gimba2Eno E. Ebenso3Department of Chemistry, Ahmadu Bello University, Samaru Campus, Zaria, Kaduna State, NigeriaDepartment of Chemistry, Ahmadu Bello University, Samaru Campus, Zaria, Kaduna State, NigeriaDepartment of Chemistry, Ahmadu Bello University, Samaru Campus, Zaria, Kaduna State, NigeriaDepartment of Chemistry, School of Mathematical and Physical Sciences, North-West University (Mafikeng Campus), Private Bag X2046, Mmabatho 2735, South AfricaFicus platyphylla gum exudates (FP gum) have been analyzed for their physicochemical parameters and found to be ionic, mildly acidic, odourless, and yellowish brown in colour. The gum is soluble in water, sparingly soluble in ethanol, and insoluble in acetone and chloroform. The nitrogen (0.39%) and protein (2.44%) contents of the gum are relatively low. The concentrations of the cations were found to increase according to the following trend, Mn>Fe>Zn>Pb>Cu>Mg>Cd>Ca. Analysis of the FTIR spectrum of the gum revealed vibrations similar to those found in polysaccharides while the scanning electron micrograph indicated that the gum has irregular molecular shapes, arranged randomly. The intrinsic viscosity of FP gum estimated by extrapolating to zero concentrations in Huggins, Kraemer, Schulz-Blaschke, and Martin plots has an average value of 7 dL/g. From the plots of viscosity versus shear rate/speed of rotation and also that of shear stress versus shear rate, FP gum can be classified as a non-Newtonian gum with characteristics-plastic properties. Development of the Master_s curve for FP gum also indicated that the gum prefers to remain in a dilute domain (C<C∗), such that 𝜂sp𝛼C1.2. The apparent activation energy of flow for FP gum (calculated from Arrhenius-Frenkel-Eyring plot) was relatively low and indicated the presence of fewer inter- and intramolecular interactions.http://dx.doi.org/10.1155/2013/254347 |
| spellingShingle | Nnabuk O. Eddy Paul O. Ameh Casimir E. Gimba Eno E. Ebenso Rheological Modeling and Characterization of Ficus platyphylla Gum Exudates Journal of Chemistry |
| title | Rheological Modeling and Characterization of Ficus platyphylla Gum Exudates |
| title_full | Rheological Modeling and Characterization of Ficus platyphylla Gum Exudates |
| title_fullStr | Rheological Modeling and Characterization of Ficus platyphylla Gum Exudates |
| title_full_unstemmed | Rheological Modeling and Characterization of Ficus platyphylla Gum Exudates |
| title_short | Rheological Modeling and Characterization of Ficus platyphylla Gum Exudates |
| title_sort | rheological modeling and characterization of ficus platyphylla gum exudates |
| url | http://dx.doi.org/10.1155/2013/254347 |
| work_keys_str_mv | AT nnabukoeddy rheologicalmodelingandcharacterizationofficusplatyphyllagumexudates AT pauloameh rheologicalmodelingandcharacterizationofficusplatyphyllagumexudates AT casimiregimba rheologicalmodelingandcharacterizationofficusplatyphyllagumexudates AT enoeebenso rheologicalmodelingandcharacterizationofficusplatyphyllagumexudates |