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Contribution A Letude De Levolution Des Orthophosphates De Calcium Precipites Amorphes En Orthophosphates Apatitiques
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Book Synopsis Contribution à l'étude de l'évolution des orthophosphates de calcium précipités amorphes en orthophosphates apatitiques by : Jean-Claude Heughebaert
Download or read book Contribution à l'étude de l'évolution des orthophosphates de calcium précipités amorphes en orthophosphates apatitiques written by Jean-Claude Heughebaert and published by . This book was released on 1977 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: PREPARATION ET COMPOSITION DU PHOSPHATE TRICALCIQUE. ETUDE DE SON HYDROLYSE. AU MOMENT DE SA PRECIPITATION, L'ORTHOPHOSPHATE TRICALCIQUE EST NON CRISTALLIN, IL EVOLUE EN PRESENCE D'HUMIDITE, EN PHOSPHATE TRICALCIQUE A STRUCTURE APATITE. LA CRISTALLISATION DE L'ORTHOPHOSPHATE PRECIPITE APPARAIT QUAND LE SOLIDE ATTEINT LA DEMI-HYDROLYSE ENVIRON
Book Synopsis HDBK EXPMTL ASPECTS OF ORAL BIOCHEMISTRY by : Eugene P. Lazzari
Download or read book HDBK EXPMTL ASPECTS OF ORAL BIOCHEMISTRY written by Eugene P. Lazzari and published by Springer. This book was released on 1983-11-02 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Contribution à l'étude cinétique de l'évolution de l'état amorphe à l'état apatitique des orthophosphates trimétalliques (Ca, Mg) précipités by : Christian Guégan
Download or read book Contribution à l'étude cinétique de l'évolution de l'état amorphe à l'état apatitique des orthophosphates trimétalliques (Ca, Mg) précipités written by Christian Guégan and published by . This book was released on 1978 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: POUR L'ORTHOPHOSPHATE TRICALCIQUE, L'EVOLUTION DU GEL TRICALCIQUE PRECIPITE CA::(9)(PO::(4))::(6).NH::(2)O DEBUTE PAR L'HYDROLYSE D'IONS PO::(4)**(3-) EN IONS HPO::(4)**(2-) ET OM**(-) A LA SURFACE DES PARTICULES DE PRECIPITE. LA STRUCTURE CRISTALLISEE SOUS FORME D'APATITE COMMENCE A APPARAITRE QUAND X EST VOISIN DE 0,3. L'EVOLUTION ISOTHERME EN PRESENCE D'IONS MG SUIT UN PROCESSUS DE GERMINATION-CROISSANCE
Book Synopsis Comportement d'orthophosphates de calcium amorphes ou cristallisés en présence d'eau by : Anabelle Rodrigues
Download or read book Comportement d'orthophosphates de calcium amorphes ou cristallisés en présence d'eau written by Anabelle Rodrigues and published by . This book was released on 1998 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE MEMOIRE PORTE SUR L'ETUDE DU COMPORTEMENT D'ORTHOPHOSPHATES DE CALCIUM AMORPHES OU CRISTALLISES EN PRESENCE D'EAU. DANS LA PREMIERE PARTIE, ON ETUDIE L'EVOLUTION DE CES PHOSPHATES SOUS LA FORME DE GEL. DES GELS DE PHOSPHATE TRICALCIQUE (PTC) ONT ETE PREPARES A LA FOIS EN MILIEU AQUEUX OU EN MILIEU HYDROALCOOLIQUE. LE GEL DE PHOSPHATE OCTOCALCIQUE (OCP) NE PEUT ETRE OBTENU QU'EN MILIEU HYDROALCOOLIQUE. ILS ONT ETE MAINTENUS A 80C, 60C OU 40C ET LEUR EVOLUTION A ETE SUIVIE EN FONCTION DU TEMPS. TOUT D'ABORD, LA CRISTALLISATION INTERVIENT DANS LES DEUX CAS PROBABLEMENT PAR UN ASSEMBLAGE DE CLUSTERS DE PHOSPHATE AMORPHE QUI ENTRAINE L'HYDROLYSE PARTIELLE D'IONS PO#4#3#-. LE TAUX D'HYDROLYSE DEPEND DE LA DIMENSION DE CES ASSEMBLAGES. IL A ETE MONTRE QUE DANS LE CAS DU PTC, L'ABSENCE D'ALCOOL DANS LE MILIEU DE SYNTHESE ET UNE TEMPERATURE ELEVEE, FAVORISENT L'HYDROLYSE INTERNE DES IONS PO#4#3#-, ET PAR LA MEME LA CRISTALLISATION. LES ECHANTILLONS DE PTC RESTENT STABLES ENSUITE AU COURS DU TEMPS. DANS LE CAS DE L'OCP, L'EVOLUTION A ETE SUIVIE SUR DES GELS CONTENANT PLUS OU MOINS D'AMMONIAQUE. APRES SA CRISTALLISATION, L'ECHANTILLON SE DECOMPOSE. IL SE FORME DU PTC ET SELON LA QUANTITE D'AMMONIAQUE, SOIT DE LA MONETITE SOIT DU DIHYDROGENOPHOSPHATE D'AMMONIUM. DANS LA SECONDE PARTIE, LE COMPORTEMENT, EN ATMOSPHERE HUMIDE, DES MEME ORTHOPHOSPHATES DE CALCIUM A ETE EXAMINE A 80C, 60C OU 40C. DANS LE CAS DU PTC, IL A ETE SUIVI SUR DES ECHANTILLONS AMORPHES ET CRISTALLISES PRESENTANT DE LEGERES VARIATIONS DU RAPPORT CA/P AUTOUR DE 1,50. LES PTC AMORPHES CRISTALLISENT EN APATITE DANS UN PREMIER TEMPS. QUELLE QUE SOIT LA FORME CRISTALLINE INITIALE, ILS SE DECOMPOSENT ENSUITE EN HYDROXYAPATITE ET EN MONETITE. LA CINETIQUE DE DECOMPOSITION DEPEND DU RAPPORT CA/P DES PTC. CEUX DE RAPPORT CA/P SUPERIEUR OU EGAL A 1,50 SONT PLUS STABLES. DANS LE CAS DE L'OCP AMORPHE, LA CRISTALLISATION CONDUIT A LA VARIETE APATITIQUE ET SELON LA TEMPERATURE EGALEMENT A LA VARIETE TRICLINIQUE. CES DEUX VARIETES CRISTALLINES SE DECOMPOSENT ENSUITE EN HYDROXYAPATITE ET EN MONETITE D'AUTANT PLUS VITE QUE LA TEMPERATURE EST ELEVEE.
Book Synopsis Contribution à l'étude des mécanismes réactionnels entre différents phosphates de calcium et le sulfate d'ammonium by : Mohamed Marraha
Download or read book Contribution à l'étude des mécanismes réactionnels entre différents phosphates de calcium et le sulfate d'ammonium written by Mohamed Marraha and published by . This book was released on 1982 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'auteur étudie les réactions intervenant au cours du chauffage entre différents phosphates de calcium (phosphate tricalcique anhydre Ca3(PO4)2 (βTCP) ; hydroxyapatite Ca10(PO4)6(OH)2 ; phosphate tricalcique apatitique Ca9(HPO4)5(OH) d'une part et le sulfate d'ammonium d'autre part. Il montre que ces réactions font intervenir différentes phosphates condensés et le sulfate de calcium. Lors de la réaction avec l'hydroxyapatite on otient un soilde de structure βTCP contenant CaSo4, tandis qu'au cours des réactions avec βTCP ou le phosphate tricalcique apatitique, on obtient toujours βTCP pur. Une nouvelle série de solides de structure βTCP et contenant CaSO4 (phosphosulfate de calcium ) a été mise en évidence. Sa composition limite correspondrait à la formule (Ca23 )(PO4)14(SO4)2. Ces matériaux constituent de nouvelles biocéramiques. Techniques d'étude utilisé : ATG, R-X, IR, analyse chimique, chromatographie sur papier, mesures de masses volumiques.
Book Synopsis Calcium Phosphates in Biological and Industrial Systems by : Zahid Amjad
Download or read book Calcium Phosphates in Biological and Industrial Systems written by Zahid Amjad and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calcium Phosphates in Biological and Industrial Systems provides a comprehensive discussion on calcium phosphates in the diverse areas of their applications. The authors are all respected specialists in their particular fields, possessing wide knowledge and experience and able to analyze recent results and relate them to their respective areas of expertise. New information, as well as a review of current concepts, highlights the individual contributions. Due to the broad scope of the subject covered and the large number of contributions, this book is divided into three parts. Whilst each section contains a basic theme, there is a considerable overlapping of ideas and approaches. This reflects the excitement and interdisciplinary nature of investigations by researchers interested in dissimilar aspects of calcium phosphates. Considering the general interest in calcium phosphates, Calcium Phosphates in Biological and Industrial Systems is directed at an audience of researchers in the fields of biology, chemistry, dentistry, geology, chemical engineering, environmental engineering, and medicine. It will also be useful to technology-focused researchers in industry whose investigations might be related directly or indirectly to calcium phosphates.
Book Synopsis Bioceramics and their Clinical Applications by : Tadashi Kokubo
Download or read book Bioceramics and their Clinical Applications written by Tadashi Kokubo and published by Elsevier. This book was released on 2008-03-25 with total page 785 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioceramics have been used very successfully within the human body for many years. They are commonly used in orthopaedic surgery and dentistry but they are potentially suitable for a wide range of important applications within the medical device industry. This important book reviews the range of bioceramics, their properties and range of clinical uses.Chapters in the first section of the book discusses issues of significance to a range of bioceramics such as their structure, mechanical properties and biological interactions. The second part reviews the fabrication, microstructure and properties of specific bioceramics and glasses, concentrating on the most promising materials. These include alumina and zirconia ceramics, bioactive glasses and bioactive glass-ceramics, calcium sulphate, tricalcium phosphate-based ceramics, hydroxyapatite, tricalcium phosphate/hydroxyapatite biphasic ceramics, si-substrated hydroxyapatite, calcium phosphate cement, calcium phosphate coating, titania-based materials, ceramic-polymer composites, dental ceramics and dental glass-ceramics. The final group of chapters reviews the clinical applications of bioceramics in joint replacement, bone grafts, tissue engineering and dentistry.Bioceramics and their clinical applications is written by leading academics from around the world and it provides an authoritative review of this highly active area of research. This book is a useful resource for biomaterials scientists and engineers, as well as for clinicians and the academic community. Provides an authoritative review of this highly active area of research Discusses issues of significance of a range of bioceramics such as their structure, mechanical properties and biological interactions Reviews the clinical applications of bioceramics in joint replacement, bone grafts, tissue engineering and dentistry
Book Synopsis Structure and Chemistry of the Apatites and Other Calcium Orthophosphates by : J.C. Elliott
Download or read book Structure and Chemistry of the Apatites and Other Calcium Orthophosphates written by J.C. Elliott and published by Elsevier. This book was released on 2013-10-22 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: The apatites and related calcium phosphates have been of considerable interest to biologists, mineralogists, and inorganic and industrial chemists for many years. This book contains a detailed description of the structures and structural interrelationships of the calcium orthophosphates, including the apatites. Their preparation, crystal growth and dissolution, chemical reactions including thermal decomposition, IR, Raman and NMR spectra and various physical properties are discussed. Apatites other than those containing calcium and phosphorus are included. Synthetic, mineral and biological carbonate apatites are also considered. A wide, but critical coverage of the literature is given, which includes a substantial amount not written in English. Research from many disciplines is included which results in a comprehensive compilation of recent work.
Book Synopsis Determination and Use of Stability Constants by : Arthur Earl Martell
Download or read book Determination and Use of Stability Constants written by Arthur Earl Martell and published by Wiley-VCH. This book was released on 1992 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes potentiometric methods for determining stability constants and explains how these constants can be used to describe metal ion speciation in complex environmental and biological systems. It also provides three original computer programs on a disk for calculating stability constants and for using stability constants to calculate concentrations of molecular species in solution. The author gives examples of calculations for simple metal chelates, for metal complexes of large organic molecules, and for mixtures containing several metal ions and complexing agents in aqueous solution. They also describe common errors in calculating stability constants and how to avoid them. This carefully revised second edition is now even more useful to the reader, and, in particular, to those who make use of the program disk. Each program has been revised to improve speed, control, and error trapping.
Book Synopsis Bone Structure and Metabolism by : G. E. W. Wolstenholme
Download or read book Bone Structure and Metabolism written by G. E. W. Wolstenholme and published by John Wiley & Sons. This book was released on 2009-09-18 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Novartis Foundation Series is a popular collection of the proceedings from Novartis Foundation Symposia, in which groups of leading scientists from a range of topics across biology, chemistry and medicine assembled to present papers and discuss results. The Novartis Foundation, originally known as the Ciba Foundation, is well known to scientists and clinicians around the world.
Book Synopsis Nanocrystalline Apatite-Based Biomaterials by : D. Eichert
Download or read book Nanocrystalline Apatite-Based Biomaterials written by D. Eichert and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The improvement of the biological activity and performance of bone substitute materials is one of the main concerns of orthopaedic and dental surgery specialists. Biomimetic nanocrystalline apatites exhibit enhanced and tunable reactivity as well as original surface properties related to their composition and mode of formation. Synthetic nanocrystalline apatites analogous to bone mineral can be easily prepared in aqueous media and one of their most interesting characteristics is the existence of a hydrated surface layer containing labile ionic species. Ion exchange and macromolecule adsorption processes can easily and rapidly take place due to strong interactions with the surrounding fluids. The ion mobility in the hydrated layer allows direct crystal-crystal or crystal-substrate bonding. The fine characterisation of these very reactive nanocrystals is essential and can be accomplished with different tools including chemical analysis and spectroscopic techniques such as FTIR, Raman and solid state NMR. The reactivity of the hydrated layer of apatite nanocrystals offers material scientists and medical engineers extensive possibilities for the design of biomaterials with improved bioactivity using unconventional processing. Indeed apatitic biomaterials can be processed at low temperature which preserves their surface reactivity and biological properties. They can also be associated in various ways with active molecules and/or ions. Several examples of use and processing of nanocrystalline apatites involved in the preparation of tissue-engineered biomaterials, cements, ceramics, composites and coatings on metal prostheses are presented.
Book Synopsis Structural and Chemical Organization of Teeth by : Albert Edward William Miles
Download or read book Structural and Chemical Organization of Teeth written by Albert Edward William Miles and published by . This book was released on 1967 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biomaterials Research Advances by : Jason B. Kendall
Download or read book Biomaterials Research Advances written by Jason B. Kendall and published by Nova Publishers. This book was released on 2007 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomaterials serve as synthetic or natural materials used to replace parts of living systems or to function contact with living tissue. Biomaterials are intended to interface with biological systems to evaluate, treat, augment or replace any tissue, organ or function of the body. A biomaterial is different from a biological material such as bone that is produced by a biological system. Artificial hips, vascular-stents, artificial pacemakers, and catheters are all made from different biomaterials and comprise different medical devices. This book presents new approaches to biomaterial development including multi-field bone remodelling, novel strategies for conferring antibacterial properties to bone cement, polyacrylonitrile-based biomaterials for enzyme immobilisation and functionalised magnetic nanoparticles for tissue engineering from around the globe.
Book Synopsis Biological Mineralization by : Isadore Zipkin
Download or read book Biological Mineralization written by Isadore Zipkin and published by . This book was released on 1973 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Chemical Dynamics of Bone Mineral by : William F. Neuman
Download or read book The Chemical Dynamics of Bone Mineral written by William F. Neuman and published by . This book was released on 1969 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biological Calcification: Cellular and Molecular Aspects by : Harald Schraer
Download or read book Biological Calcification: Cellular and Molecular Aspects written by Harald Schraer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: The deposition of calcium-containing salts is a widespread phenomenon in both the plant and animal kingdoms. Its occurrence suggests a generalized biological adaptation to environments rich in calcium. Indeed, the Archaean ocean was rich in calcium carbonate, and traces of ancient organisms have been found in lime stones estimated to be about 2. 7 billion years old. The fundamental nature of biological calcification makes it a subject of interest not only to the student of calcium metabolism and skeletal physiology, but also to biologists in general. As in many areas of biological science recent progress in this field has been rapid, and no attempt was made here to cover all the biological systems in which calcifica tion is an important facet of the organisms' method of operation. Calcification is approached in this volume at the levels of the cellular sites and molecular mechan isms that are involved in this process. The ultrastructural and chemical features of the cells and their products which are associated with calcification are empha sized in several chapters. The editor, in inviting contributions from authors, in tended that collectively the chapters should convey a sense of the ubiquitous and essential nature of the role of calcification in several phyla of the plant and animal kingdoms. The researchers were biochemists, physical chemists, cell biologists and physiologists; some represented medicine and dentistry; all were interested in calcification.
Book Synopsis Ciba Foundation Symposium on the Chemistry and Biology of Mucopolysaccharides by : Ciba Foundation
Download or read book Ciba Foundation Symposium on the Chemistry and Biology of Mucopolysaccharides written by Ciba Foundation and published by . This book was released on 1958 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
