BACKGROUND The exceptional diversity of coloration found in avian eggshells has long fascinated biologists and inspired a broad range of adaptive hypotheses to explain its evolution. Three main impediments to understanding the variability of eggshell appearance are: (1) the reliable quantification of the variation in eggshell colours; (2) its perception by birds themselves, and (3) its relation...

The effect of moult on eggshell mechanical properties, on composition and concentrations of organic matrix components and on eggshell microstructure was investigated. The observed changes were studied to understand the role of organic matrix and eggshell microstructure in eggshell strength. Moult was induced by zinc oxide (20 g zinc/kg diet) in 53 ISA Brown laying hens at 78 weeks of age. No di...

Vermicomposting the conversion of organic waste into vermicompost, is mediated by thecombined action earthworms and microorganisms. This interesting attractive alternative to composting turns a substrate that can be used as soil amendment growing medium for use in horticulture. Soil not required vermicomposting matter acts both food, therefore only epigeic process. Vermicompost nutrient-rich ca...

The eggshell of the hen is a highly ordered and mineralised structure, which is sequentially deposited within an acellular milieu – the uterine fluid secreted by the distal oviduct. Spherulitic crystal growth of calcite is initiated on organic aggregates on surface of the eggshell membranes, followed by competition between radial crystallites for space to form a compact columnar biomineral. The...

This study synthesised eggshell waste, an agricultural by-product, into a calcinated porous material modified by salicylic acid as new and effective adsorbent for remediation of Cu(II) from aqueous solution. The impregnation onto the surface egg-shell improved adsorption property eggshell. Furthermore, it was found that acid-modified egg-shell; (SAL-E) has highly developed functionalised rich p...

Using ancient DNA (aDNA) extracted from eggshell of the extinct moa (Aves: Dinornithiformes) we determined the species composition and number of eggs found in a late thirteenth century earth oven feature at Wairau Bar (South Island, New Zealand) – one of New Zealand’s most significant archaeological sites. Mitochondrial and nuclear DNA signatures confirmed this oven feature contained fragments ...

The use of low-cost, locally available and eco-friendly adsorbents has been investigated as an ideal alternative to the current expensive inefficient methods removing dyes from wastewater. This study investigates potential Eggshell extracted chitosan Carbonized Date-Pits in methylene blue dye. Effects adsorption dosage concentration were equally investigated. Langmuir Freundlich Isotherms used ...