Chitin-Silk Fibroin Interactions: Relevance to Calcium Carbonate Formation in Invertebrates

2003 ◽  
Vol 72 (5) ◽  
pp. 548-554 ◽  
Author(s):  
G. Falini ◽  
S. Weiner ◽  
L. Addadi
Keyword(s):  
Calcium Carbonate ◽  
Silk Fibroin ◽  
Carbonate Formation

NON-DESTRUCTIVE EXPERIMENTS AND MODELING OF CALCIUM CARBONATE FORMATION IN SOILS

2020 ◽  
Author(s):  
Carolyn D. Bland ◽  
◽  
Timothy M. Gallagher ◽  
Daniel O. Breecker
Keyword(s):  
Calcium Carbonate ◽  
Carbonate Formation ◽  
Non Destructive

scholarly journals The Influence of Finely Ground Mineral Admixture (FGMA) on Efflorescence

2013 ◽  
Vol 4 (1) ◽  
pp. 50-55 ◽  
Author(s):  
Ong Ming Wei ◽  
Norsuzailina Mohamed Sutan
Keyword(s):  
Calcium Carbonate ◽  
Chemical Analysis ◽  
Mineral Admixture ◽  
Partial Replacement ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Cement Replacement ◽  
Carbonate Formation

Efflorescence phenomenon on concrete is not new and found in the form of white deposits on surfaces of concrete. Incorporation of Finely Ground Mineral Admixture (FGMA) in concrete to prevent occurrence of efflorescence is based on reduction of portlandite, densified microstructure and thus enhanced watertightness. The magnitude of efflorescence in term of percentage of calcium carbonate formation of FGMA modified mortar were evaluated at water-cement ratio of 0.3, 0.4 and 0.5 with 10%, 20%, and 30% of cement replacement by weight. The samples were tested with chemical analysis at 7, 14, 21, 28, 60 and 90 days. The FGMA additions into mortar were comparing with ordinary mortar to evaluate enhanced performance of FGMA modified mortar toward efflorescence. The results of this experiment showed that addition of FGMA into mortar caused less formation of calcium carbonate as partial replacement of cement with certain w/c ratio and percentage of cement replacement.

Structural characterization of amorphous calcium carbonate-binding protein: an insight into the mechanism of amorphous calcium carbonate formation

2013 ◽  
Vol 453 (2) ◽  
pp. 179-186 ◽  
Author(s):  
Jingtan Su ◽  
Xiao Liang ◽  
Qiang Zhou ◽  
Guiyou Zhang ◽  
Hongzhong Wang ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Binding Sites ◽  
Binding Protein ◽  
Homology Modelling ◽  
Size Exclusion ◽  
Structural Basis ◽  
Amorphous Calcium Carbonate ◽  
Carbonate Formation

ACC (amorphous calcium carbonate) plays an important role in biomineralization process for its function as a precursor for calcium carbonate biominerals. However, it is unclear how biomacromolecules regulate the formation of ACC precursor in vivo. In the present study, we used biochemical experiments coupled with bioinformatics approaches to explore the mechanisms of ACC formation controlled by ACCBP (ACC-binding protein). Size-exclusion chromatography, chemical cross-linking experiments and negative staining electron microscopy reveal that ACCBP is a decamer composed of two adjacent pentamers. Sequence analyses and fluorescence quenching results indicate that ACCBP contains two Ca2+-binding sites. The results of in vitro crystallization experiments suggest that one Ca2+-binding site is critical for ACC formation and the other site affects the ACC induction efficiency. Homology modelling demonstrates that the Ca2+-binding sites of pentameric ACCBP are arranged in a 5-fold symmetry, which is the structural basis for ACC formation. To the best of our knowledge, this is the first report on the structural basis for protein-induced ACC formation and it will significantly improve our understanding of the amorphous precursor pathway.

scholarly journals TEM Investigations of Amorphous Calcium Carbonate Formation in Seawater

2010 ◽  
Vol 16 (S2) ◽  
pp. 1488-1489
Author(s):  
SG McMurray ◽  
BP Gorman
Keyword(s):  
Calcium Carbonate ◽  
Amorphous Calcium Carbonate ◽  
Carbonate Formation

Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.

Calcium carbonate formation byDeleya halophila:Effect of salt concentration and incubation temperature

1988 ◽  
Vol 6 (1) ◽  
pp. 49-57 ◽  
Author(s):  
M.R. Ferrer ◽  
J. Quevedo‐Sarmiento ◽  
V. Bejar ◽  
R. Delgado ◽  
A. Ramos‐Cormenzana ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Salt Concentration ◽  
Incubation Temperature ◽  
Carbonate Formation

Snapshots of calcium carbonate formation – a step by step analysis

2017 ◽  
Vol 232 (1-3) ◽  
Author(s):  
Michael Dietzsch ◽  
Iryna Andrusenko ◽  
Robert Branscheid ◽  
Franziska Emmerling ◽  
Ute Kolb ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Carbonate Formation ◽  
Recent Advances

AbstractRecent advances in our understanding of CaCO

scholarly journals The role of phosphorylation and dephosphorylation of shell matrix proteins in shell formation: an in vivo and in vitro study

CrystEngComm ◽  
2018 ◽  
Vol 20 (27) ◽  
pp. 3905-3916 ◽  
Author(s):  
Jinzhe Du ◽  
Guangrui Xu ◽  
Chuang Liu ◽  
Rongqing Zhang
Keyword(s):  
Calcium Carbonate ◽  
In Vitro Study ◽  
Matrix Proteins ◽  
Shell Formation ◽  
Carbonate Formation ◽  
Shell Matrix ◽  
Shell Matrix Proteins

Phosphorylation of shell matrix proteins is critical for shell formation in vivo and can modulate calcium carbonate formation in vitro.

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