| dc.contributor.advisor | Md. Mojaffor Hosain | |
| dc.contributor.author | SARKER, MANOBENDRO | |
| dc.date.accessioned | 2022-04-22T04:24:33Z | |
| dc.date.available | 2022-04-22T04:24:33Z | |
| dc.date.issued | 2014-12 | |
| dc.identifier.uri | http://localhost:8080/xmlui/handle/123456789/461 | |
| dc.description | The eggshell is the outermost calcified layer of egg, which protects the embryo acting as
strong physical barrier for microorganism invasion, infection and water loss from egg.
Eggshell has another important function to help in gaseous changes and it is an indigenous
calcium source for the formation of embryo skeleton. An egg weighing 60g consists of
approximately 4-6g shell, wherein 96g inorganic and only 4g organic material per 100g solid
matrix. Typically, eggshell is a three layered structure, specifically, cuticle layer, a
calcareous layer and shell membrane from outside to inside (Stadelman, 2000). Matrix of
mammillary and spongy layers consists of protein fibers attached to calcite or calcium
carbonate crystal. The chemical compositions of shell membrane includes protein (69.2%),
fat (2.7%), ash (27.2%) and moisture (1.5%) (King’ori, 2011). The inorganic chemical
compositions of eggshell are calcium carbonate (96%), magnesium carbonate (1%) and
calcium phosphate (1%) (Tsai ef a/., 2006). | en_US |
| dc.description.abstract | Considering the public health, an attempt was taken to optimize the extraction technique of
Calcium as CaCl, from eggshell and characterize chemically for possible use of human
welfare. For extraction different concentration of HCl, variation in time and temperature
were applied. Characterization of extracted calcium salt was performed by X-ray diffraction.
Among the treatments, 0.9N HCI at 70°C for 3 hours were selected as optimum conditions.
Highest yield of calcium chloride (95.08%) contains calcium (635.57mg/g), magnesium
(11.63mg/g) and zinc (9.63mg/g) usually at pH 7.45 and showed high solubility. Heavy
metal constituents in terms of arsenic (0.16ppm) and lead (1.46ppm) were found, which are
within safety limits for human consumption. The extracted calcium salt could be stored in
laminated foil at ambient condition for more than six months to make a potential use as
dietary calcium source | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | HAJEE MOHAMMOD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR | en_US |
| dc.subject | Phase analysis by XRD | en_US |
| dc.subject | Determination of Moisture content | en_US |
| dc.subject | Color measurement | en_US |
| dc.subject | Determination of pH | en_US |
| dc.title | OPTIMIZATION AND CHARACTERIZATION OF EXTRACTED CALCIUM CHLORIDE FROM EGGSHELL | en_US |
| dc.type | Thesis | en_US |
