Bibliographies thématiques / Bio-mineralization

Littérature scientifique sur le sujet « Bio-mineralization »

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Publié le 10 mars 2023

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Articles de revues sur le sujet "Bio-mineralization"

Sandri, Monica, Anna Tampieri, Luca Bertinetti et Adele Boskey. « In Vitro Bio-Mineralization Process ». Key Engineering Materials 361-363 (novembre 2007) : 543–46. http://dx.doi.org/10.4028/www.scientific.net/kem.361-363.543.

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The present work describes the development of biomimetic composites materials for bone tissue substitution and repair. At this purpose a biomimetic approach was used and apatitic phases were nucleated on macromolecular matrices like natural collagen, which act as template and induce peculiar physico-chemical features in the mineral phase.

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Nan, Kai Hui, et G. X. Pei. « Mineralization Behavior of Bioactive Ceramic Coatings Formed by Micro-Arc Oxidation on Titanium ». Key Engineering Materials 330-332 (février 2007) : 629–32. http://dx.doi.org/10.4028/www.scientific.net/kem.330-332.629.

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Titanium oxide films were obtained by MAO at the applied voltages of 250-550V and their bio-mineralization behavior was investigated. The films were composed mainly of TiO2 phases in the form of anatase and rutile and enriched with Ca and P elements in the form of CaTiO3 and amorphous calcium phosphate. Their bio-mineralization behavior was evaluated in a simulated body fluid (SBF). After immersed in SBF for 72 h, white mineralized layers were observed on the samples obtained at high voltages. The bio-mineralized rate of samples increased with the applied voltages, which resulted in the difference on morphology of different samples. The structure and composition of the films have an important effect on their bio-mineralization behavior.

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Chen, Xiao Feng, Ying Jun Wang, Na Ru Zhao et Chun Rong Yang. « Investigation on the Biomimetic Scaffold for Bone Tissue Engineering Based on Bioglass-Collagen-Hyaluronic Acid-Phosphatidylserine ». Key Engineering Materials 330-332 (février 2007) : 939–42. http://dx.doi.org/10.4028/www.scientific.net/kem.330-332.939.

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The new type of bone tissue engineering scaffold composed of the sol-gel derived bioactive glass particles, type I collagen, hyaluronic acid and phosphatidylserine were prepared through cross-linking and freeze-drying techniques. SEM observation indicated that the scaffold possessed a 3-D interconnected porous structure and a high porosity. The properties of bio-mineralization and cells biocompatibility were investigated using SBF immersion and cells culture methods combined with SEM, XRD and FTIR techniques. The study revealed that this biomimetic scaffold possessed satisfactory functions of cells attachment, bio-mineralization, and cells biocompatibility. The porous structure and the surface of the scaffold which was covered by a bone-like HA crystal layer due to bio-mineralization were profitable for cells attachment and spread.

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Qian, Chunxiang, Xinwei Ren, Yafeng Rui et Kai Wang. « Characteristics of bio-CaCO3 from microbial bio-mineralization with different bacteria species ». Biochemical Engineering Journal 176 (décembre 2021) : 108180. http://dx.doi.org/10.1016/j.bej.2021.108180.

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López-García, Sergio, Miguel R. Pecci-Lloret, Julia Guerrero-Gironés, María P. Pecci-Lloret, Adrián Lozano, Carmen Llena, Francisco Javier Rodríguez-Lozano et Leopoldo Forner. « Comparative Cytocompatibility and Mineralization Potential of Bio-C Sealer and TotalFill BC Sealer ». Materials 12, n^o 19 (22 septembre 2019) : 3087. http://dx.doi.org/10.3390/ma12193087.

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The aim of this study was to investigate the cytocompatibility and mineralization potential of two premixed hydraulic endodontic sealers compared with an epoxy resin-based root canal sealer. The cellular responses and mineralization capacity were studied in human periodontal ligament stem cells (hPDLSCs) that were exposed to premixed hydraulic sealers, Bio-C Sealer (Angelus, Londrína, PR, Brazil), TotalFill BC Sealer (FKG Dentaire SA, La-Chaux-de-fonds, Switzerland) and an epoxy resin-based material, AH Plus (Dentsply De Trey, Konstanz, Germany). Non-exposed cultures served as the control. The endodontic sealers were assessed using scanning electron microscopy (SEM) and energy dispersive X-ray microanalysis (EDX). Statistical analyses were done using Analisis of Variance (ANOVA), with Bonferroni adjusted pairwise comparison (p = 0.05). AH Plus reduced cell viability and cell migration, whereas increased cell viability and cell migration were observed in the Bio-C Sealer and the TotalFill BC Sealer (p < 0.05). The lowest cell attachment and spreading were observed for all concentrations of AH Plus, whereas the highest were observed for TotalFill BC Sealer. At the end of 21 days, only the Bio-C Sealer and the TotalFill BC Sealer supported matrix mineralization (p < 0.05). Additionally, SEM-EDX revealed high content of calcium, oxygen, and silicon in the Bio-C Sealer and the TotalFill BC Sealer. Based on the results from this study, Bio-C Sealer and TotalFill BC Sealer demonstrated better cytocompatibility in terms of cell viability, migration, cell morphology, cell attachment, and mineralization capacity than AH Plus.

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Zhu, Lixia, Mengmeng Cao, Chengchen Sang, Tingxuan Li, Yanjun Zhang, Yunxia Chang et Lili Li. « Trichoderma Bio-Fertilizer Decreased C Mineralization in Aggregates on the Southern North China Plain ». Agriculture 12, n^o 7 (11 juillet 2022) : 1001. http://dx.doi.org/10.3390/agriculture12071001.

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Trichoderma bio-fertilizer is widely used to improve soil fertility and carbon (C) sequestration, but the mechanism for increasing C accumulation remains unclear. In this study, effects of Trichoderma bio-fertilizer on the mineralization of aggregate-associated organic C were investigated in a field experiment with five treatments (bio-fertilizer substitute 0 (CF), 10% (BF10), 20% (BF20), 30% (BF30) and 50% (BF50) chemical fertilizer nitrogen (N)). Aggregate fractions collected by the dry sieving method were used to determine mineralization dynamics of aggregate-associated organic C. The microbial community across aggregate fractions was detected by the phospholipid fatty acid (PLFA) method. The results indicated that Trichoderma bio-fertilizer increased organic C stock across aggregate fractions and bulk soil compared with CF. Cumulative mineralization of aggregate-associated organic C increased with the increasing bio-fertilizer application rate. However, the proportion of organic mineralized C was lower in the BF20 treatment except for <0.053 mm aggregate. Moreover, the PLFAs and fungal PLFA/bacterial PLFA first increased and then decreased with increasing bio-fertilizer application rates. Compared with CF, the increases of bacteria PLFA in >2 mm aggregate were 79.7%, 130.0%, 141.0% and 148.5% in BF10, BF20, BF30 and BF50, respectively. Similarly, the PLFAs in 0.25–2, 0.053–0.25 and <0.053 mm aggregates showed a similar trend to that in >2 mm aggregate. Bio-fertilizer increased the value of fungi PLFA/bacteria PLFA but decreased G+ PLFA/G− PLFA, and BF20 shared the greatest changes. Therefore, appropriate Trichoderma bio-fertilizer application was beneficial to improving soil micro-environment and minimizing risks of soil degradation.

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Kim, Hayeon, H. M. Son et H. K. Lee. « Characterization of bio-adsorptive removal performance of strontium through ureolysis-mediated bio-mineralization ». Chemosphere 288 (février 2022) : 132586. http://dx.doi.org/10.1016/j.chemosphere.2021.132586.

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Zhang, Yuanyuan, Hao Li, Yue Huang, Lizhou Sun et Genxi Li. « Peptide-induced bio-mineralization as a bio-mimetic means of detecting proteins in a mineralizing bio-context ». Nano Research 9, n^o 5 (mai 2016) : 1489–96. http://dx.doi.org/10.1007/s12274-016-1045-6.

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Chiarpotto, M., G. Ciasca, M. Vassalli, C. Rossi, G. Campi, A. Ricci, B. Bocca et al. « Mechanism of aluminium bio-mineralization in the apoferritin cavity ». Applied Physics Letters 103, n^o 8 (19 août 2013) : 083701. http://dx.doi.org/10.1063/1.4818749.

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IWAHORI, Kenji. « Synthesis and Application of Compound Semiconductor NPs by Using Bio-mineralization and Bio-template ». KAGAKU TO SEIBUTSU 55, n^o 3 (2017) : 166–73. http://dx.doi.org/10.1271/kagakutoseibutsu.55.166.

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Plus de sources

Thèses sur le sujet "Bio-mineralization"

Nuss, Hermann. « Development of polymeric vesicles as bio-inspired mineralization microreactors ». Versailles-St Quentin en Yvelines, 2012. http://www.theses.fr/2012VERS0023.

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Les vésicules sont des structures formées par auto-assemblage de molécules amphiphiles, qui délimitent un petit volume aqueux et l’isolent de l’environnement aqueux extérieur, de la même façon que les cellules biologiques. Dans le cadre de cette thèse, nous avons travaillé avec des vésicules de polymères, aussi appelées polymersomes. Ces objets synthétiques peuvent être utilisés comme microréacteurs chimiques en générant des réactions chimiques dans leur volume intérieur. En se laissant inspirés par la biominéralisation biologique contrôlée qui conduit aux tissus durs comme la nacre ou l’os, nous avons cherché à mimer ce phénomène naturel en considérant la précipitation du carbonate de calcium ou du phosphate de calcium à l’intérieur de tels compartiments polymères. Nous avons développé une plateforme microfluidique qui permet de piéger et de manipuler des centaines de vésicules simultanément. Après avoir déterminé la perméabilité des vésicules à l’eau et aux ions de calcium, nous avons réussi à rendre les vésicules sélectivement perméables aux ions calcium. Finalement, nous avons réussi à utiliser des vésicules polymères comme microréacteurs chimiques en réalisant des réactions de minéralisation intravésiculaires
Vesicles are self-assembled structures made of amphiphilic molecules that enclose a small aqueous volume, which is separated from the external aqueous phase, similar to biological cells. In this thesis, we dealt with polymersomes, which are vesicles that are made of polymers. These synthetic objects can be used as chemical microreactors by performing chemical reactions in their interior. Inspired by the biologically controlled mineralization that leads to hard tissues, such as nacre or bones, we aimed at mimicking this natural phenomenon by considering the precipitation of calcium carbonate or calcium phosphate inside such polymer compartments. We developed a microfluidic platform that allows one to trap and manipulate hundreds of vesicles simultaneously. After investigations the vesicle permeability towards water and calcium ions, we managed to make the vesicles selectively permeable to calcium. Finally, we successfully made use of polymer vesicles as microreactors and carried out intravesicular mineralization reactions

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Wu, Baohu [Verfasser]. « Bio-inspired Magnetite Mineralization in Gelatin Hydrogels : A Small Angle Scattering Investigation / Baohu Wu ». Konstanz : Bibliothek der Universität Konstanz, 2016. http://d-nb.info/1122020406/34.

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Esmilaire, Roseline. « Matériaux membranaires en TiO₂ sous-stœchiométrique pour le traitement de l'eau par procédé électrochimique d'oxydation avancée ». Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT182.

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Ce projet vise à contribuer à la gestion durable d'une ressource naturelle essentielle, l'eau, à travers le développement d'une technologie innovante basée sur le couplage d’un procédé de filtration baromembranaire et de procédés d'oxydation avancée électrochimiques (POAE) afin de minéraliser des molécules organiques très stables.Comme ces polluants dits bio-réfractaires ne peuvent pas être dégradés par les procédés d’oxydation classiques (biologiques, O3, Cl2, H2O2…), les procédés d'oxydation avancée (POA) sont alors envisagés. En électrochimie, les radicaux hydroxyles peuvent être générés sur des cathodes en carbone par le procédé électro-Fenton ou encore à l’anode sur des matériaux à forte surtension de dégagement d'oxygène tels que l'oxyde de titane sous-stœchiométrique ou le diamant dopé au bore (DDB) par une réaction d'oxydation de l'eau.Ce travail porte sur l'élaboration et la caractérisation de membranes tubulaires de filtration composées des phases Magnéli les plus conductrices électroniques : Ti4O7 et Ti5O9. Ce matériau peut être utilisé dans le procédé d’oxydation anodique avec un coût de fabrication plus faible que le diamant dopé au bore. Des membranes tubulaires de microfiltration composées de ces phases ont été préparées en collaboration avec le Centre de Recherches et d’Études Européen du groupe Saint-Gobain. Celles-ci ont été élaborées par réduction carbothermique de TiO2, ce qui est très novateur par rapport à la réduction sous dihydrogène. Des poudres de TinO2n-1 (avec 3 ≤ n ≤ 5) ont été préparées par électrofusion de poudres de TiO2 et de carbone suivie de broyages. Ces poudres de granulométrie contrôlée ont ensuite été utilisées à l’IEM pour préparer des suspensions stables de particules en vue de réaliser des couches minces de basse microfiltration, par trempage ou engobage, composées de TinO2n-1 (avec 4 ≤ n ≤ 6). Nous proposons également une première méthode d’élaboration de couches minces en TinO2n-1 (n à définir) par voie sol-gel suivie d’un traitement thermique dans le but d’obtenir des couches réactives d’ultra et de nanofiltration. Après optimisation, ces matériaux ont pu montrer leur efficacité vis-à-vis de la dégradation de polluants bio-réfractaires de type pharmaceutique (Paracétamol) lorsqu’ils sont utilisés en tant que « membranes réactives électrochimiques » que ce soit en mode statique (bécher) ou en mode dynamique (pilote de filtration). La prochaine étape portera sur le couplage des procédés d’oxydation anodique et de filtration baromembranaire utilisant les membranes réactives développées. Au vu des premiers tests, cette technologie s’avère d’ores et déjà prometteuse pour le traitement de polluants bio-réfractaires dans l’eau. Cette thèse a été financée par l'Agence Nationale de la Recherche (ANR) dans le cadre du programme ECO-TS (Projet CElectrON)
This project aims to contribute to the sustainable management of water as an essential natural resource, through the development of an innovative technology based on the coupling of a baromembranar filtration process and electrochemical advanced oxidation processes (EAOP) in order to mineralize very stable organic molecules.Since these bio-refractory pollutants cannot be totally degraded by common oxidants (biological, O3, Cl2, H2O2), advanced oxidation processes (AOP) are thus considered. In electrochemistry, these hydroxyl radicals can be generated by water oxidation on carbon cathodes by the electro-Fenton process or on anode showing high oxygen evolution overvoltage like sub-stoichiometric titanium oxide and Boron Doped Diamond (BDD).This work deals with the development and characterization of tubular filtration membranes composed of the most conductive Magnéli phases: Ti4O7 and Ti5O9. These materials can be used in anodic oxidation process with lower manufacturing cost compared to BDD. Microfiltration tubular membranes composed of these phases were prepared with the support of CREE (Research Group of Saint-Gobain). They were elaborated by carbothermal reduction of TiO2, which is very innovative compared to dihydrogen reduction. TinO2n-1 powders (with 3 ≤ n ≤ 5) of controlled grain size were elaborated by electrofusion of TiO2 powder and coke followed by grinding. These powders were further used at the European Institute of Membranes to formulate stable suspensions of particles to prepare thin solid films of low microfiltration, by dip-coating or slip-casting. We also propose an original method for the production of thin layers of TinO2n-1 (n to be defined) by sol-gel route followed by a thermal treatment to obtain ultra or nanofiltration active layers. After optimization, those materials have shown their efficiency towards the degradation of bio-refractory compounds such as pharmaceutics (Paracetamol) when used as electrochemical reactive membranes either in static (beaker) or in dynamic mode (filtration pilot). The next step will focus on the coupling of the anodic oxidation and the baromembranar filtration processes using the reactive developed membranes. From first results, this technology appears really promising for the treatment of bio-refractory pollutants in water. This thesis was financially supported by the National Research Agency (NRA) within the framework of the ECO-TS program, the CElectrON project

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SIOTTO, MICHELA BARBARA. « Study of the biodegradation in soil of new generation plactics ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2011. http://hdl.handle.net/10281/19950.

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The intense use of plastic contributes to increase the amount of municipal waste that are generally disposed in landfill. For some applications and sectors, an important alternative to the conventional plastic materials can be found in the use of the new generation materials: the biodegradable polymers. Their use can be an alternative to landfill disposal and can thus reduce the cost of waste management and the accumulation in the environment. The biodegradable polymers, in fact, are used by microorganisms as source of carbon and are converted by into carbon dioxide (or methane), water and mineral salts of any other element present (mineralization) plus new biomass. Generally, laboratory test methods developed for determining the biodegradability of polymeric material are based on the evaluation of the carbon dioxide production (respirometric test), but in order to completely describe the biodegradation process and to avoid an underestimation of the biodegradation percentage, it is very important to quantify and identify possible by-products and biomass production. The experimental work presents in this thesis concerned the study of the different aspects of the biodegradation of new generation plastics in soil. Particular attention was focused on the fate of the possible by-products of biodegradable polymers (the monomers) and on the determination of the biomass generated during the process. To summarize: 1) The effects of the soil pH on the mineralization of ten monomers, chosen between the most widely used for the synthesis of plastic materials, was evaluated by respirometric tests and the experimental data were used to validate a numerical model that can estimate the amount of carbon used by microorganism for biochemical synthesis. 2) The mineralization of a model polyester was investigated by respirometric tests in different soil mixtures in order to evaluate the effects of the initial soil pH and of the addition of organic matter. 3) The combustion of soil samples at 550 °C was used for determining the amount of organic matter and biomass in soil samples. The sensitivity of the method was evaluated by adding different low amounts of organic matter to a natural and a synthetic soil. 4) In order to describe the carbon balance during the biodegradation of the model polyester, biomass production and polyester residues in soil were estimated. Biomass and organic matter deriving by polyester biodegradation were studied by combustion of soil samples. Polyester residues were estimated by extractions in soxhlet of soil samples (with chloroform) and the extracts were characterized by 1H-NMR and 31P-NMR acquisitions and GPC.

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Douglass, James F. « Biomineralization of atrazine and analysis of 16S rRNA and catabolic genes of atrazine-degraders in a former pesticide mixing and machinery washing area at a farm site and in a constructed wetland ». The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1440373757.

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Cai, Zih Ping, et 蔡子平. « The Study of Mineralization Performance and Mechanics Character for Osteoblasts Seed on the Different Bio-materials ». Thesis, 2011. http://ndltd.ncl.edu.tw/handle/01541933300424416815.

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碩士
國立嘉義大學
生物機電工程學系研究所
99
Surface properties of materials can vary cell growth and differentiation. In this study, PDMS, PCL and PLGA were used to study cell adhesive force of osteoblasts on different types of materials. In addition, osteoblasts were cultured in medium with the addition of β-glycerophosphate and ascorbic acid to study the influence on the cell adhesive force. In cell mineralization study, osteoblasts were growth and mineralized on PDMS, PCL, PLGA and PMMA surfaces and AFM was used to measure the material roughness and cell elasticity on materials. Results show that material roughness is PMMA >PLGA>PCL>PDMS. The dielectrophoresis force produced by the driving voltage of electrodes is used to measure osteoblast adhesion strength on the biomaterial surface. In osteoblast adhesive study, the electric adhesion force of osteoblasts show non-linear relationship with time but osteoblasts had best adhesion force after eight hours cultivation. Generally, cell adhesion force on material surface is PLGA>PCL>PDMS and the addition of β-glycerophosphate and ascorbic acid would decrease cell adhesion force. In osteoblast mineralization, we used alizarin red S dye to stain calcium precipitate. The atomic force microscope was used to measure elasticity of osteoblasts based on force - displacement curve. Results showed that calcium content was increased with time. By the measurement of AFM, the elastic modulus of osteoblasts was risen with time. These results suggested that the mineralization of osteoblasts can increase cell elasticity. After 21 days of osteoblast mineralization, the cell behaviors on different types of materials are various. Osteoblasts on PMMA surface showed higher calcium content and elasticity. In conclusion, material roughness can vary osteoblast mineralization.

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CATELANI, TIZIANO. « Interaction Processes between Biota and Natural Inorganic Systems : Environmental Applications ». Doctoral thesis, 2017. http://hdl.handle.net/2158/1077880.

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Bio-mediated and chemical processes for Arsenic uptake in calcite were investigated by means of synchrotron radiation techniques (XAS, CTR, RAXR) coupled with more traditional mineralogical analysis (XRD, XRF). The processes are presented here in two distinct works. Regarding the Arsenic uptake in bacterial calcite, our study began with the characterization of Bullicame Hot Springs (Viterbo, Italy) where naturally As-enriched travertines precipitate. From such hot springs bacteria were sampled and cultured in laboratory, selecting the strains which were more resistant to high As concentrations and were able to precipitate calcite. Among the 65 strains isolated, B.licheniformis was selected for bio-mediated calcite precipitation experiments both in liquid and solid medium. Bacterial calcites were characterized by means of XRD, XRF and XAS in order to investigate As trapping. The main outcomes regards the positive effect of Mg in incorporating As in calcite, the effect of As on calcite structure, and the role of bacteria and their living environment in regulating the As cycle. In particular we demonstrate that bacterial precipitation process allow Arsenite uptake in calcite differently form the chemical process. Medium properties and the presence of Magnesium have been observed to be critical parameters of this process. Regarding the chemical process we focused both on Arsenic and Mercury, two environmentally dangerous elements. Uptake experiments on calcite-(104) surface were performed by means of in situ experiments with liquid cell AFM and X-Ray Reflectivity techniques (CTR and RAXR), in order to investigate in depth the adsorption and incorporation during calcite-(104) epitaxial growth. Regarding Arsenic we observed that uptake process results efficient only for Arsenate which partially influences calcite surface structure, while Arsenite uptake is almost negligible. More in detail, our results suggest that Arsenate uptake passes through surface adsorption and subsequent ordering in calcite crystal lattice substituting carbonate during crystal growth. Regarding Mercury, we observed the effective uptake in calcite but our results do not clearly resolve if Hg2+ substitutes Ca2+ in calcite crystal structure. On the other hand we found that Mercury trapped in calcite seems to be unstable causing surface relaxation with mineral aging with re-ordering of surface structure.

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Saad, Sarra Ahmed Mohamed. « Processes and balance of organic matter turnover and transformation of mineral compounds during decomposition of biogenic material in the presence of soil material ». Doctoral thesis, 2002. http://hdl.handle.net/11858/00-1735-0000-0006-AEC0-3.

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Chapitres de livres sur le sujet "Bio-mineralization"

Sandri, Monica, Anna Tampieri, Luca Bertinetti et Adele Boskey. « In Vitro Bio-Mineralization Process ». Dans Bioceramics 20, 543–46. Stafa : Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-457-x.543.

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Chen, Xiao Feng, Ying Jun Wang, Na Ru Zhao, Jian Dong Ye, Yu Dong Zheng, Cheng Yun Ning et Gang Wu. « Microstructure and Bio-Mineralization Behavior of the Sol-Gel Derived Bioactive Materials ». Dans High-Performance Ceramics III, 1609–12. Stafa : Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-959-8.1609.

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Dey, Archan, et Nico A. J. M. Sommerdijk. « CHAPTER 4. Advanced Transmission Electron Microscopy to Explore Early Stages of Bio(mimetic)mineralization ». Dans Materials Design Inspired by Nature, 74–106. Cambridge : Royal Society of Chemistry, 2013. http://dx.doi.org/10.1039/9781849737555-00074.

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Huynh, Nguyen Ngoc Tri, Kei-ichi Imamoto, Chizuru Kiyohara, Nguyen Pham Huong Huyen et Nguyen Khanh Son. « Mechanism Analysis and Improvement of Bacterial Bio-Mineralization for Self-healing Concrete Using Bacillus subtilis Natto Immobilized in Lightweight Aggregate ». Dans Lecture Notes in Civil Engineering, 763–71. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-7160-9_77.

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Rohini, I., et R. Padmapriya. « Compressive Strength of Waste Utilized Concretes through Bio-mineralization Technique ». Dans Current Overview on Science and Technology Research Vol. 4, 39–50. Book Publisher International (a part of SCIENCEDOMAIN International), 2022. http://dx.doi.org/10.9734/bpi/costr/v4/3847a.

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Wolf, Stephan E., Martina Schußler, Corinna F. Bohm et Benedikt Demmert. « Frontiers in Bio-Inspired Mineralization : Addressing Mimesis of Four-Dimensional, Hierarchical, and Nonclassical Growth Characteristics of Biominerals ». Dans Frontiers in Biomaterials, 160–76. BENTHAM SCIENCE PUBLISHERS, 2019. http://dx.doi.org/10.2174/9789811406898119060010.

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LeGeros, R. Z., I. Orly, M. Gregoire et G. Daculsi. « 7. Substrate Surface Dissolution and Interfacial Biological Mineralization ». Dans Bone-Bio Material Interface. Toronto : University of Toronto Press, 1991. http://dx.doi.org/10.3138/9781442671508-010.

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Battula, Satyanarayana. « A Perspective of Diverse Synthetic Approaches and Biological Applications of Vitamin K ». Dans Vitamin K - Recent Advances, New Perspectives and Applications for Human Health [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99565.

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Vitamin-K is a demanding multi-functional health product in the market and belongs to a class of isoprenoid molecules that comprises methylnaphthoquinone (MK) unit attached to an isoprene side chain. They are fat soluble and differ in the extent of side chain & obtained in the nature as vitamin K1 (phylloquinone), menaquinone/vitamin K2, and other lipoquinones. Owing to their owned polyprenyl side chain, they are hydrophobic/lipophilic in nature. Generally, the synthesis of vitamin K and its variants suffers with isomerization (for example 11 isomers were identified for cis/trans MK-7). Naturally, in bio-systems vitamin K produces through shikimic acid pathway and terpene biosynthetic pathway for the synthesis of menaquinone part & prenyl side chain parts respectively. Menadione or its auxiliaries are commonly being used as substrates to the synthesis of vitamin K variants through the involvement of condensation reactions, Friedel-Craft alkylation’s, Claisen rearrangement, Diels-Alder reactions and others. Importantly, organometallic reagents, such as Grignard, Gilman, organotelluride and other reagents could be the promising and consistent choice of substrate to the synthesis of various vitamin K’s. Vitamin K is well known for blood coagulation. As an antihaemorrhagic vitamin, it’s also being the current interest for the treatment of bone and vascular diseases. In addition, vitamin k is indispensable for the activation of vitamin K dependent (VKD) proteins and that are present almost in all tissues and responsible for hemostasis, bone mineralization, arterial calcification, apoptosis, phagocytosis, growth control, chemotaxis, and signal transduction. This chapter summarizes various synthetic approaches of vitamin K & derivatives and their biological functions.

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Johnsson, M. S.-A., E. Paschalis et G. H. Nancollas. « 6. Kinetics of Mineralization, Demineralization, and Transformation of Calcium Phosphates at Mineral and Protein Surfaces ». Dans Bone-Bio Material Interface. Toronto : University of Toronto Press, 1991. http://dx.doi.org/10.3138/9781442671508-009.

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Actes de conférences sur le sujet "Bio-mineralization"

Kai Li et Sie Chin Tjong. « Hydrothermal synthesis and bio-mineralization of hydroxyapatite nanorod ». Dans 2010 IEEE 3rd International Nanoelectronics Conference (INEC). IEEE, 2010. http://dx.doi.org/10.1109/inec.2010.5425169.

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Pavan, Barbara, Dan Zhou, Brandon Whitman, Marco Fornari, Mary Tecklenburg, P. M. Champion et L. D. Ziegler. « Bone Bio-Mineralization : in Depth Analysis of Hydroxylapatite Crystallization Through Experiments and Simulations ». Dans XXII INTERNATIONAL CONFERENCE ON RAMAN SPECTROSCOPY. AIP, 2010. http://dx.doi.org/10.1063/1.3482549.

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Elmaloglou, Ariadni, Dimitrios Terzis, Pietro De Anna, Lyesse Laloui, Stéphane Mahé et Filippo Miele. « Microfluidic-Based Study on the Activation and Evolution of Calcite Bio-Mineralization for Geotechnical Applications ». Dans Geo-Congress 2020. Reston, VA : American Society of Civil Engineers, 2020. http://dx.doi.org/10.1061/9780784482834.009.

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Terzis, Dimitrios, Lyesse Laloui, Sarah Dornberger et Ray Harran. « A Full-Scale Application of Slope Stabilization via Calcite Bio-Mineralization Followed by Long-Term GIS Surveillance ». Dans Geo-Congress 2020. Reston, VA : American Society of Civil Engineers, 2020. http://dx.doi.org/10.1061/9780784482834.008.

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Müller, A., M. Polgári, A. Gucsik, E. Pál-Molnár, M. Koós, M. Veres, J. Götze et al. « Cathodoluminescent Features and Raman Spectroscopy of Miocene Hydrothermal Bio-mineralization Embedded in Cryptocrystalline Silica Varieties, Central Europe, Hungary ». Dans MICRO-RAMAN SPECTROSCOPY AND LUMINESCENCE STUDIES IN THE EARTH AND PLANETARY SCIENCES : Proceedings of the International Conference Spectroscopy 2009. AIP, 2009. http://dx.doi.org/10.1063/1.3222889.

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Olceroglu, Emre, Stephen M. King, Md Mahamudur Rahman et Matthew McCarthy. « Biotemplated Superhydrophobic Surfaces for Enhanced Dropwise Condensation ». Dans ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-88158.

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The increased heat transfer achieved through dropwise condensation, as compared to filmwise condensation, has the potential to substantially impact a variety of applications including high-heat flux thermal management systems, integrated electronics cooling, and various industrial and chemical processes. Here, we report stable dropwise condensation onto biotemplated nanostructured super-hydrophobic surfaces. We have demonstrated continuous droplet coalescence and ejection at diameters of less than 20 μm and compared directly with flat hydrophobic surfaces. The self-ejection mechanism characteristic of dropwise condensation has been shown using a simple bio-nano-fabrication technique based on the self-assembly and mineralization of the Tobacco mosaic virus (TMV). This process is extendable to commercially relevant nanomanufacturing of both microscale electronics devices as well as large-scale large-area industrial equipment. This manufacturing flexibility is unique as compared to many other micro/nano-structured surfaces fabricated to demonstrate similar increases in condensation heat transfer.

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Zhang, Qingwei, Wei Zhang, Jephte Augustin, Donggang Yao, David M. Wootton, Fredric A. Kleinbart, Norman A. Johanson, Kimberly A. Wasko, Peter I. Lelkes et Jack G. Zhou. « Bio-Testing of Poly-L-Lactic Acid/Hydroxyapatite Porous Bone Scaffolds ». Dans ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64125.

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Tissue engineering is a rapidly growing interdisciplinary field which offers a promising new technology to create artificial constructs for regeneration of tissues. One important aspect of bone tissue engineering is to build scaffolds with interconnected 3-D porous structure in order to mimic natural bone architecture. In this work, co-continuous micro-porous scaffolds made of Poly-L-lactic acid (PLLA) with 50% porosity and PLLA/hydroxyapatite (HA) with 40% porosity were prepared by injection molding of an immiscible polymer blend with polystyrene as sacrificial material. The sacrificial material was then removed by solvent leaching with cyclohexane. The porous PLLA/HA matrix supported murine osteoblast (7F2) cell growth for up to 9 days, suggesting that that the introduction and replacement of sacrificial material had no negative effects on cell proliferation. In vitro studies also indicate an increase in mineralization by osteoblasts cultured on the porous structure, as compared to cells cultured on solid scaffold. One month subcutaneous degradation tests showed a mild foreign body reaction and complete fibrous encapsulation. Following surgical implantation of the scaffolds into circular defects in canine tibia, we observed after 12 weeks new bone tissue grew into the porous structures. Taken together our data suggest that interconnected porous structures with good cytocompatibility and increased mineralization in vitro paired with enhanced osteoinductive properties in vivo suggest a great potential of the porous PLLA/HA for inducing and sustaining bone tissue repair.

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Moletti, Chiara, Valeria Arosio et Giovanni Dotelli. « Microstructural Characterization of Prefabricated Hempcrete Blocks ». Dans 4th International Conference on Bio-Based Building Materials. Switzerland : Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/www.scientific.net/cta.1.388.

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Sustainable building materials have been developed to reduce the polluting emissions and the exploitation of natural resources of the building sector. Among these materials, an outstanding category is that of nature-based solutions which are produced recovering waste or by-products of agricultural cultivations and using them as vegetal aggregates to replace the traditional ones. This paper focusses on hempcrete which is produced mixing the by-product of industrial hemp cultivation (i.e., shives) and lime to obtain a sustainable, breathable and insulating material. The strength of hempcrete develops through carbonation of the binder that, leading to the formation of calcium or magnesium carbonates and mineralization of shives, determines the microstructure and hence most of the characteristic properties of the material. The aim of this research is to investigate how carbonation influences the microstructure of hempcrete when different recipes are used for blocks production. This study consists in the characterization of the material through techniques such as XRD (X-ray Diffractometry), SEM (Scanning Electron Microscopy) and TG-DTG (thermogravimetric analyses). Moreover, the evolution of carbonation is studied analyzing samples at different maturation times. The investigation of the carbonation reaction degree is also crucial to evaluate the environmental performances of the material because it allows the quantification of the carbon dioxide uptake. Also, periodic characterization allows to assess the durability of hempcrete and to select the best formulation according to the designed application and the corresponding service conditions.

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