Effect of Surface-Exposed Chemical Groups on Calcium-Phosphate Mineralization in Water-Treatment Systems

2010 ◽  
Vol 44 (20) ◽  
pp. 7937-7943 ◽  
Author(s):  
Zvi Steiner ◽  
Hanna Rapaport ◽  
Yoram Oren ◽  
Roni Kasher
Keyword(s):  
Water Treatment ◽  
Calcium Phosphate ◽  
Phosphate Mineralization ◽  
Chemical Groups ◽  
Effect Of Surface

Biopolymer-induced calcium phosphate scaling in membrane-based water treatment systems: Langmuir model films studies

2016 ◽  
Vol 143 ◽  
pp. 233-242 ◽  
Author(s):  
Yara N. Dahdal ◽  
Yoram Oren ◽  
Dietmar Schwahn ◽  
Vitaliy Pipich ◽  
Moshe Herzberg ◽  
...  
Keyword(s):  
Water Treatment ◽  
Calcium Phosphate ◽  
Langmuir Model

A protocol to develop crack-free biomimetic coatings on Ti6Al4V substrates

2007 ◽  
Vol 22 (6) ◽  
pp. 1593-1600 ◽  
Author(s):  
Sahil Jalota ◽  
Sutapa Bhaduri ◽  
Sarit B. Bhaduri ◽  
A. Cuneyt Tas
Keyword(s):  
Water Treatment ◽  
Calcium Phosphate ◽  
Alkali Treatment ◽  
Sodium Titanate ◽  
Calcium Phosphate Coating ◽  
First Case ◽  
Phosphate Coatings ◽  
Biomimetic Coating ◽  
One Step ◽  
Calcium Phosphate Coatings

Biomimetic coating of titanium and related alloys with carbonated apatitic calcium phosphate is an important area of research in implantology. While this paper specifically refers to coating Ti6Al4V, the results are valid with other related alloys as well. One step in the protocol involves an intermediate alkali treatment of Ti6Al4V to form a sodium titanate layer on the alloy surface. This pretreatment enhances the formation of the coating from simulated body fluid (SBF) solutions. Many papers in the biomimetic coating literature demonstrate the presence of cracks in coatings, irrespective of the SBF compositions and placement of the substrates. The presence of cracks may result in degradation and delamination of coatings. To the best of our knowledge, this issue remains unresolved. Therefore, the aim of this study was: (i) to examine and understand the reasons for cracking and (ii) based on the results, to develop a protocol for producing crack-free apatitic calcium phosphate coatings on Ti6Al4V substrates. In this study, the authors focused their attention on the alkali treatment procedure and the final drying step. It is hypothesized that these two steps of the process affect the crack formation the most. In the first case, the surfaces of alkali-treated substrates were examined with/without water-soaking treatment before immersing in SBF. This water treatment modifies the sodium titanate surface layer. In the second case, two different drying techniques (after soaking in SBF) were used. In one procedure, the coated substrates were dried rapidly, and in the other they were dried slowly. It was observed that the water treatment, irrespective of the drying method, provides a surface, which on subsequent soaking in SBF forms a crack-free apatitic calcium phosphate coating. Based on these results, the authors suggest a protocol incorporating a water-soaking treatment after the alkali treatment and prior to the SBF soaking treatment to obtain crack-free coatings.

scholarly journals Recombinant DNA technology and click chemistry: a powerful combination for generating a hybrid elastin-like-statherin hydrogel to control calcium phosphate mineralization

2017 ◽  
Vol 8 ◽  
pp. 772-783 ◽  
Author(s):  
Mohamed Hamed Misbah ◽  
Mercedes Santos ◽  
Luis Quintanilla ◽  
Christina Günter ◽  
Matilde Alonso ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Click Chemistry ◽  
Recombinant Dna ◽  
Fibrillar Structure ◽  
Cross Link ◽  
Recombinant Dna Technology ◽  
Peptide Epitope ◽  
Phosphate Mineralization ◽  
Potential Applications ◽  
Dna Technology

Understanding the mechanisms responsible for generating different phases and morphologies of calcium phosphate by elastin-like recombinamers is supreme for bioengineering of advanced multifunctional materials. The generation of such multifunctional hybrid materials depends on the properties of their counterparts and the way in which they are assembled. The success of this assembly depends on the different approaches used, such as recombinant DNA technology and click chemistry. In the present work, an elastin-like recombinamer bearing lysine amino acids distributed along the recombinamer chain has been cross-linked via Huisgen [2 + 3] cycloaddition. The recombinamer contains the SNA15 peptide domains inspired by salivary statherin, a peptide epitope known to specifically bind to and nucleate calcium phosphate. The benefit of using click chemistry is that the hybrid elastin-like-statherin recombinamers cross-link without losing their fibrillar structure. Mineralization of the resulting hybrid elastin-like-statherin recombinamer hydrogels with calcium phosphate is described. Thus, two different hydroxyapatite morphologies (cauliflower- and plate-like) have been formed. Overall, this study shows that crosslinking elastin-like recombinamers leads to interesting matrix materials for the generation of calcium phosphate composites with potential applications as biomaterials.

scholarly journals Understanding the early stages of calcium phosphate mineralization through hyperpolarized NMR techniques.

2021 ◽  
Author(s):  
Tristan Georges ◽  
Ludovica Epasto ◽  
Albina Selimović ◽  
Dennis Kurzbach ◽  
Thierry Azaïs
Keyword(s):  
Calcium Phosphate ◽  
Early Stages ◽  
Phosphate Mineralization ◽  
Nmr Techniques

scholarly journals Poly(ethylene imine)-Controlled Calcium Phosphate Mineralization

Langmuir ◽  
2008 ◽  
Vol 24 (5) ◽  
pp. 2102-2109 ◽  
Author(s):  
Andriy Shkilnyy ◽  
Alwin Friedrich ◽  
Brigitte Tiersch ◽  
Stefanie Schöne ◽  
Mabya Fechner ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Ethylene Imine ◽  
Phosphate Mineralization ◽  
Poly Ethylene

Calcium phosphate mineralization with linear poly(ethylene imine): a time-resolved study

2011 ◽  
Vol 289 (8) ◽  
pp. 881-888 ◽  
Author(s):  
Andriy Shkilnyy ◽  
Stefanie Schöne ◽  
Claudia Rumplasch ◽  
Annett Uhlmann ◽  
Annett Hedderich ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Ethylene Imine ◽  
Time Resolved ◽  
Phosphate Mineralization ◽  
Linear Poly ◽  
Poly Ethylene
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