Show simple item record

dc.contributor.authorMbonyiryivuze, Agnes
dc.contributor.authorNuru, Z. Y.
dc.contributor.authorNgom, Balla Diop
dc.contributor.authorMwakikunga, Bonex
dc.contributor.authorDhlamini, Simon Mokhotjwa
dc.contributor.authorPark, Eugene
dc.contributor.authorMaaza, Malik
dc.date.accessioned2019-05-27T07:08:40Z
dc.date.available2019-05-27T07:08:40Z
dc.date.issued2015
dc.identifier.uriDOI:10.12691/ajn-3-1-3
dc.identifier.urihttp://dspace.nm-aist.ac.tz/handle/123456789/214
dc.descriptionResearch Article published by Science and Education Publishing Vol. 3, No. 1, 2015en_US
dc.description.abstractMelanins are difficult to characterize because of their intractable chemical properties and the heterogeneity in their structural features. Melanin pigments, in fact, are composed of many different types of monomeric units that are connected through strong carbon-carbon bonds. Its high insolubility and undefined chemical entities are two obstacles in its complete characterization. The morphological characterization and particle size distribution for sepia melanin by Scanning Electron Microscopy (SEM) on surface structure and Transmission Electron Microscopy (TEM) to confirm the morphology obtained from SEM was done. Both results show that Sepia melanin is formed by many aggregates agglomerated together. These aggregates are formed also by small spherical granules with different size distributions that have been determined using image-J software. The small granule diameter obtained from different TEM and SEM micrographs were 100-200nm. EDS reveals that C and O were the most abundant in sepia melanin with concentration average concentrations of about 57% and 24% respectively. The major compositions of sepia melanin are C, O, Na, Cl, while the minor are Mg, Ca, K, S and N. From TEM micrograph at high resolution, it was possible to measure the distance between polymers layers of sepia melanin using image-J software and it was 0.323 nm = 3.23 Å.en_US
dc.language.isoen_USen_US
dc.publisherScience and Education Publishingen_US
dc.subjectsepia melaninen_US
dc.subjectsepia officinalisen_US
dc.titleMorphological and Chemical Composition Characterization of Commercial Sepia Melaninen_US
dc.typeArticleen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record