The structural variation of Ca-carbonate grown in the presence of mono-L-glutamic and mono-L-aspartic acid
MetadataShow full item record
Over the past four decades, the interest in biomineralisation has rapidly increased, helped along by an enormous improvement in analytical instrument capabilities. The main driving forces came initially from the field of medical and biochemical research, but the extraordinary characteristics of biologically produced materials (nano-composites) have also encouraged the involvement of scientists from other disciplines, in particular material scientists, who hope that the next industrial revolution will be driven by nano-technology, either through bio-mimicking or bio-inspired new materialsThis research will focus on providing evidence to clarify an uncertainty in relation to Ca-carbonate biomineralisation. A lot is known about the effect of organic substances on the polymorph and morphology of Ca-carbonate grown in their presence, but it is not clear if only the organic template and/or soluble molecules (be they natural or synthetic) direct the growth through simple structural similarity (i.e. epitaxially) or if other phenomena are involved. The production of thick amorphous layers of Ca-carbonate and the discovery of a liquid amorphous precursor has added some uncertainty about the role of the organic component. This role will be investigated using different amino-acids and varying a number of physical and chemical factors.The influence of two amino-acids commonly found in biomineralisation systems, namely L-glutamic acid (GLU) and L-aspartic acid (ASP) on the phase, abundance and morphology of CaCO3 as a function of concentration, sequence and duration of addition, and harvesting time was investigated. Ninety-six independent samples were produced, covering a wide range of organic additive concentration, harvesting time, and reactant solution as summarized in the table below.
Showing items related by title, author, creator and subject.
Size exclusion chromatography as a tool for natural organic matter characterisation in drinking water treatmentAllpike, Bradley (2008)Natural organic matter (NOM), ubiquitous in natural water sources, is generated by biogeochemical processes in both the water body and in the surrounding watershed, as well as from the contribution of organic compounds ...
Fisher, Nicholas G. (2000)Activated carbon is widely used in the gold processing industry as an adsorbent for the gold cyanide complex, [Au(CN)(subscript)2]. However, many other processing reagents are also adsorbed (termed fouling), which compete ...
Sandison, Carolyn M. (2001)The importance of organic sulphur fixation in the preservation of organic matter in humic coal-forming environments is demonstrated in this thesis. The transgression of coal depositional systems by marine waters during ...