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Coppola L, Lorenzi S, Kara P, Garlati S. Performance and Compatibility of Phosphonate-Based Superplasticizers for Concrete. Buildings 2017; 7:62. [DOI: 10.3390/buildings7030062] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
{100} hopper-like NaCl crystals were prepared upon the action of DNA by the solvent evaporation method.
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Affiliation(s)
- Yazhou Qin
- State Key Laboratory of Industrial Control Technology
- Research Center for Analytical Instrumentation
- College of Control Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Dongdong Yu
- Department of Chemistry
- Zhejiang University
- Hangzhou
- China
| | - Jianguang Zhou
- State Key Laboratory of Industrial Control Technology
- Research Center for Analytical Instrumentation
- College of Control Science and Engineering
- Zhejiang University
- Hangzhou 310027
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Tian L, Qian K, Wei S, Yao C, Wang Y. Ferrous Tartrate recognition of sodium chloride {111} and its effect on crystal growth. Crystal Research and Technology 2016. [DOI: 10.1002/crat.201600166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Liang Tian
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 P.R.China
| | - Kun Qian
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 P.R.China
| | - Shuhai Wei
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 P.R.China
| | - Chen Yao
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 P.R.China
| | - Yihong Wang
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 P.R.China
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Despas C, Schnitzler V, Janvier P, Fayon F, Massiot D, Bouler JM, Bujoli B, Walcarius A. High Frequency Impedance Measurement as a Relevant Tool for Monitoring the Apatitic Cement Setting Reaction. Acta Biomater 2014; 10:940-950. [PMID: 24513413 DOI: 10.1016/j.actbio.2013.10.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 10/18/2013] [Accepted: 10/18/2013] [Indexed: 11/15/2022]
Abstract
This work reports the development of a relevant and general method based on high frequency impedance measurements, for the in situ monitoring of the alpha-tricalcium phosphate (α-TCP) to calcium-deficient hydroxyapatite (CDA) transformation which is the driving force of the hardening processes of some calcium phosphate cements (CPC) used as bone substitutes. The three main steps of the setting reaction are identified in a non invasive way through the variation of dielectric permittivity and dielectric losses. The method is also likely to characterize the effect of the incorporation of additives (i.e, antiosteoporotic bisphosphonate drugs such as Alendronate) in the CPC formulation on the hydration process. It allows not only to confirm the retarding effect of bisphosphonate by an accurate determination of setting times, but also to assess the phenomena taking place whether alendronate is added in the liquid phase or combined to the solid phase of the cement composition. Compared to the conventional Gillmore needle test, the present method offers the advantage of accurate, user-independent, in situ and real-time determination of the initial and final times of the chemical hardening process, which are important parameters when considering surgical applications.
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Affiliation(s)
- Christelle Despas
- LCPME, Université de Lorraine CNRS UMR 7564, 405 rue de Vandoeuvre 54600 Villers Lès Nancy, France.
| | - Verena Schnitzler
- Graftys SARL Eiffel Park bâtiment D 415 rue Claude Nicolas Ledoux, pôle d'activités d'Aix en Provence, 13854 Aix en Provence cedex 3, France
| | - Pascal Janvier
- CEISAM, Université de Nantes CNRS UMR 6230, 2 rue de la Houssinière BP92208, 44322 NANTES cedex 03, France
| | - Franck Fayon
- CEMHTI, CNRS, UPR 3079, 1D Avenue de la Recherche Scientifique, 45071 Orléans Cedex 02, France; Université d'Orléans, Faculté des Sciences, Avenue du Parc Floral, 45067 Orléans Cedex 02, France
| | - Dominique Massiot
- CEMHTI, CNRS, UPR 3079, 1D Avenue de la Recherche Scientifique, 45071 Orléans Cedex 02, France; Université d'Orléans, Faculté des Sciences, Avenue du Parc Floral, 45067 Orléans Cedex 02, France
| | - Jean-Michel Bouler
- LIOAD, Université de Nantes INSERM UMR 791 Faculté de chirurgie dentaire BP84215, 44042 NANTES cedex1, France
| | - Bruno Bujoli
- CEISAM, Université de Nantes CNRS UMR 6230, 2 rue de la Houssinière BP92208, 44322 NANTES cedex 03, France
| | - Alain Walcarius
- LCPME, Université de Lorraine CNRS UMR 7564, 405 rue de Vandoeuvre 54600 Villers Lès Nancy, France
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Li F, Chen Y, Long S, Yu Q. The Retardation Effect of Super-Retarding Polycarboxylate-Type Superplasticizer on Cement Hydration. Arab J Sci Eng 2013; 38:571-577. [DOI: 10.1007/s13369-012-0326-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Schnitzler V, Fayon F, Despas C, Khairoun I, Mellier C, Rouillon T, Massiot D, Walcarius A, Janvier P, Gauthier O, Montavon G, Bouler JM, Bujoli B. Investigation of alendronate-doped apatitic cements as a potential technology for the prevention of osteoporotic hip fractures: critical influence of the drug introduction mode on the in vitro cement properties. Acta Biomater 2011; 7:759-70. [PMID: 20854940 DOI: 10.1016/j.actbio.2010.09.017] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2010] [Revised: 09/07/2010] [Accepted: 09/14/2010] [Indexed: 01/22/2023]
Abstract
Combination of a bisphosphonate (BP) anti-osteoporotic drug, alendronate, with an apatitic calcium phosphate cement does not significantly affect the main properties of the biomaterial, in terms of injectability and setting time, provided that the BP is introduced chemisorbed onto calcium-deficient apatite, one of the components of the cement. In contrast to other modes of introducing the BP into the cement formulation, this mode allows to minimize alendronate release in the cement paste, thus limiting the setting retardant effect of the BP. An original approach based on high frequency impedance measurements is found to be a convenient method for in situ monitoring of the cement setting reaction. The release profile of the drug from a cement block under continuous flow conditions can be well described using a coupled chemistry/transport model, under simulated in vivo conditions. The results show that the released alendronate concentration is expected to be much lower than the cytotoxic concentration.
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Affiliation(s)
- Verena Schnitzler
- Graftys SARL, Eiffel Park, Bâtiment D, 415 Rue Claude Nicolas Ledoux, Pôle d'Activités d'Aix en Provence, 13854 Aix en Provence Cedex 3, France
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