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Articles de revues sur le sujet « Bio-mineralization »

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Auteur : Grafiati
Publié le 10 mars 2023

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1

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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2

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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3

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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5

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, no 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, no 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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8

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, no 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, no 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, no 3 (2017) : 166–73. http://dx.doi.org/10.1271/kagakutoseibutsu.55.166.

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11

Shang, Dengkui, Nifan Zhou, Zhengguan Dai, Nengyu Song, Zongrong Wang et Piyi Du. « Formation of calcium carbonate nanoparticles through the assembling effect of glucose and the influence on the properties of PDMS ». RSC Advances 12, no 22 (2022) : 13600–13608. http://dx.doi.org/10.1039/d2ra02025d.

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12

Yu, Xiaoniu, et Jianguo Jiang. « Mineralization and cementing properties of bio-carbonate cement, bio-phosphate cement, and bio-carbonate/phosphate cement : a review ». Environmental Science and Pollution Research 25, no 22 (14 juin 2018) : 21483–97. http://dx.doi.org/10.1007/s11356-018-2143-7.

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13

Wu, Shuyi, Jieda Wang, Leiyan Zou, Lin Jin, Zhenling Wang et Yan Li. « A three-dimensional hydroxyapatite/polyacrylonitrile composite scaffold designed for bone tissue engineering ». RSC Advances 8, no 4 (2018) : 1730–36. http://dx.doi.org/10.1039/c7ra12449j.

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14

Fandzloch, Marzena, Weronika Bodylska, Katarzyna Roszek, Katarzyna Halubek-Gluchowska, Anna Jaromin, Yuriy Gerasymchuk et Anna Lukowiak. « Solvothermally-derived nanoglass as a highly bioactive material ». Nanoscale 14, no 14 (2022) : 5514–28. http://dx.doi.org/10.1039/d1nr05984j.

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15

Chen, Tao, Peiheng Shi, Yi Li, Tao Duan, Yang Yu, Xianyan Li et Wenkun Zhu. « Biomineralization of varied calcium carbonate crystals by the synergistic effect of silk fibroin/magnesium ions in a microbial system ». CrystEngComm 20, no 17 (2018) : 2366–73. http://dx.doi.org/10.1039/c8ce00099a.

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16

Merk, Vivian, Munish Chanana, Tobias Keplinger, Sabyasachi Gaan et Ingo Burgert. « Hybrid wood materials with improved fire retardance by bio-inspired mineralisation on the nano- and submicron level ». Green Chemistry 17, no 3 (2015) : 1423–28. http://dx.doi.org/10.1039/c4gc01862a.

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Sustainable societies require the development of engineered hybrid materials. Bio-inspired mineralization of the wood cell wall architecture with calcium carbonate offers a green alternative to conventional fire-retardant systems.
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17

Atanasova, Petia, Vladimir Atanasov, Lisa Wittum, Alexander Southan, Eunjin Choi, Christina Wege, Jochen Kerres, Sabine Eiben et Joachim Bill. « Hydrophobization of Tobacco Mosaic Virus to Control the Mineralization of Organic Templates ». Nanomaterials 9, no 5 (24 mai 2019) : 800. http://dx.doi.org/10.3390/nano9050800.

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The robust, anisotropic tobacco mosaic virus (TMV) provides a monodisperse particle size and defined surface chemistry. Owing to these properties, it became an excellent bio-template for the synthesis of diverse nanostructured organic/inorganic functional materials. For selective mineralization of the bio-template, specific functional groups were introduced by means of different genetically encoded amino acids or peptide sequences into the polar virus surface. An alternative approach for TMV surface functionalization is chemical coupling of organic molecules. To achieve mineralization control in this work, we developed a synthetic strategy to manipulate the surface hydrophilicity of the virus through covalent coupling of polymer molecules. Three different types of polymers, namely the perfluorinated (poly(pentafluorostyrene) (PFS)), the thermo-responsive poly(propylene glycol) acrylate (PPGA), and the block-copolymer polyethylene-block-poly(ethylene glycol) were examined. We have demonstrated that covalent attachment of hydrophobic polymer molecules with proper features retains the integrity of the virus structure. In addition, it was found that the degree of the virus hydrophobicity, examined via a ZnS mineralization test, could be tuned by the polymer properties.
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18

Qian, Chun Xiang, Mian Luo, Li Fu Ren, Rui Xing Wang, Rui Yang Li, Qing Feng Pan et Huai Cheng Chen. « Self-Healing and Repairing Concrete Cracks Based on Bio-Mineralization ». Key Engineering Materials 629-630 (octobre 2014) : 494–503. http://dx.doi.org/10.4028/www.scientific.net/kem.629-630.494.

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In this paper, three bio-mineralization mechanisms were proposed to repair cement-based materials cracks. The common feature is that the three are all induced by bacterial. A type of bacterial which can decompose urea and release carbonate ions could be applied to repair micro cracks on concrete surface when combining calcium ions. But what need to be noted is that the way of repairing cracks is passive. Some alkaliphilic bacterial spores could be added to concrete when casted and two different types of bacterial were used to realize the function of self-healing. The sources of carbonate ions made them different, the one release carbonate dioxide through its own cellular respiration, the other could transfer carbon dioxide in air to bicarbonate. Coefficient of capillary suction, apparent water permeation coefficient and area repairing rate were applied to characterize the repairing effectiveness. The tests results were that all three bio-mineralization mechanisms showed excellent repair effect to small cracks formed at early ages. When the bacteria were immobilized by ceramsite, the self-healing effect could be improved for the cracks formed at late ages.
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Ramachandran, M., Chinnasami Sivaji et Soniya Sriram. « An Overview of Dental Implant and Its Bio Mineralization Screening ». Pharmaceutical Sciences and Resarch 1, no 1 (1 juillet 2022) : 34–41. http://dx.doi.org/10.46632/psr/1/1/6.

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Dental and oral health is yours overall health and well-being are an essential part. Poor oral hygiene cavities and gums lead to diseases and are associated with heart disease, cancer and diabetes. Healthy teeth and maintaining the gums is a lifelong duty. Brushing, brushing and sugar intake if you quickly learn proper oral hygiene habits such as restraint, Expensive dental treatments and long-term health problems can be easily avoided. And may include the following: Keeping mouth and teeth clean to prevent. Dental care is the maintenance of healthy teeth; Oral hygiene is a dental problem in maintaining healthy teeth and gums, proper brushing, plaque removal, oral hygiene. A specialized tooth the office runs where you can brush your teeth for free and get a 20 percent discount on other dental related services. Tooth decay is caused by eating too many sweets and not brushing your teeth afterward. The dental hygienist assists the dentist in cleaning patients' teeth before doing any other work.
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Jiang, Xinbai, Jinyou Shen, Kaichun Xu, Dan Chen, Yang Mu, Xiuyun Sun, Weiqing Han, Jiansheng Li et Lianjun Wang. « Substantial enhancement of anaerobic pyridine bio-mineralization by electrical stimulation ». Water Research 130 (mars 2018) : 291–99. http://dx.doi.org/10.1016/j.watres.2017.12.005.

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21

Bommanavar, Sushma, Jagadish Hosmani, Rafi Ahmad Togoo, Hosam Ali Baeshen, A. Thirumal Raj, Shankargouda Patil, Shilpa Bhandi et Dowen Birkhed. « Role of matrix vesicles and crystal ghosts in bio-mineralization ». Journal of Bone and Mineral Metabolism 38, no 6 (31 juillet 2020) : 759–64. http://dx.doi.org/10.1007/s00774-020-01125-x.

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Schweizer, Sylvia, et Andreas Taubert. « Polymer-Controlled, Bio-Inspired Calcium Phosphate Mineralization from Aqueous Solution ». Macromolecular Bioscience 7, no 9–10 (11 septembre 2007) : 1085–99. http://dx.doi.org/10.1002/mabi.200600283.

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Emam, Hany, Daniel Leach, Zongyang Sun, Boon Ching Tee, Berfin Karatas, Do-Gyoon Kim et Courtney Jatana. « The Effect of Parathyroid Hormone Analogues When Added to Mineralized Bone Xenografts ». Journal of Oral Implantology 46, no 4 (16 avril 2020) : 372–79. http://dx.doi.org/10.1563/aaid-joi-d-19-00016.

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Implants can be a treatment option when there is sufficient quantity and quality of bone to provide support for long-term success. In the reconstruction of defects, autogenous bone remains the gold standard for its osteogenic and compatibility properties. However, the disadvantage of secondary surgery and the associated donor site morbidity prompts researchers to develop the ideal bone substitute for optimum bone reconstruction. Parathyroid hormone (PTH1-34) has provided a new option for improvement in bone regeneration. This study used a pig model to evaluate the effectiveness of parathyroid hormone when added to a xenograft, Bio-Oss, in reconstructing mandible defects. Six domestic pigs were used to create 3 posterior mandibular defects measuring 2 × 1-cm bilaterally with a total of 36 defects to simulate tooth extraction sites in humans. The defects were grafted in random order and divided into 3 groups as follows: control (no graft), Bio-Oss without PTH, and Bio-Oss with PTH. Defects were assessed with cone beam computerized tomography (CBCT), micro computerized tomography (microCT), nanoindentation, and histology. Results showed that adding PTH1-34 significantly enhanced the graft construct. CBCT showed a significant increase in the degree of bone mineralization. Nanoindentation showed increased hardness of regenerated bone and accelerated bone mineralization with PTH. MicroCT analysis revealed a trend toward higher bone regeneration and mineralization. The histological analysis showed a positive trend of the increase in cortical bone thickness and mineral apposition rate. In conclusion, the local addition of PTH1-34 to a xenograft has shown promising results to enhance bone regeneration in the reconstruction of mandibular defects.
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Chen, Yanqiang, et Chunxiang Qian. « A new method for anti-efflorescence of mortar by bio-mineralization ». Construction and Building Materials 290 (juillet 2021) : 123261. http://dx.doi.org/10.1016/j.conbuildmat.2021.123261.

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Sun, Yongshuai, et Anping Lei. « Enhanced Compressive Strength of the Bentonite-Amended Cement via Bio-Mineralization ». Advances in Materials Science and Engineering 2022 (27 septembre 2022) : 1–9. http://dx.doi.org/10.1155/2022/7220528.

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Bentonite, a supplementary cementitious material for Portland cement, has greatly contributed to environmental sustainability. However, few studies have investigated mortar samples produced by substituting bentonite for cement, and cement strength may be adversely affected when cement is replaced with bentonite in larger proportions. Therefore, this paper investigates and discusses the effect of microbially induced calcium carbonate precipitation (MICP) on improving the strength of bentonite-amended cement. The bio-mineralization process of MICP was characterized by SEM-EDS, while the biominerals formed in bentonite-amended mortar were identified by FIIR and XRD analysis. The results showed that: at bentonite concentrations of 0%, 10%, 20%, 30%, and 40% in cement, the bacterial suspension and reaction solution enhanced the compressive strength of bentonite-amended cement by 17%, 20%, 79%, 78%, and 38%, respectively, after 28 days, compared to control specimens; With the increased bacterial concentration in the presence of the reaction solution, the strength of the bentonite-amended cement (20% bentonite) increased remarkably compared to the control specimen (without bacteria). When the bacterial concentration was OD600 2.0, the compressive strength of bentonite-amended cement (20% bentonite) increased by 80% after 28 days; MICP process has a great effect on improving the strength of bentonite-amended cement. It is a green and economical choice to use MICP to improve the strength of bentonite-amended cement.
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Zhong, Wenwei, Jingwei Hou, Hao-Cheng Yang et Vicki Chen. « Superhydrophobic membranes via facile bio-inspired mineralization for vacuum membrane distillation ». Journal of Membrane Science 540 (octobre 2017) : 98–107. http://dx.doi.org/10.1016/j.memsci.2017.06.033.

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Qian, Chunxiang, Lifu Ren, Bin Xue et Tianji Cao. « Bio-mineralization on cement-based materials consuming CO 2 from atmosphere ». Construction and Building Materials 106 (mars 2016) : 126–32. http://dx.doi.org/10.1016/j.conbuildmat.2015.10.105.

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Wang, Xiaohui, Chunyan Song, Xiao Liu, Jing Zhang, Yanbo Zhang, Xueqing Shi et Dogun Kim. « Bio-Fenton-Assisted Biological Process for Efficient Mineralization of Polycyclic Aromatic Hydrocarbons from the Environment ». Processes 10, no 7 (5 juillet 2022) : 1316. http://dx.doi.org/10.3390/pr10071316.

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The intensive production of fossil fuels has led to serious polycyclic aromatic hydrocarbon (PAH) contamination in water and soil environments (as PAHs are typical types of emerging contaminants). Bio-Fenton, an alternative to Fenton oxidation, which generates hydrogen peroxide at a nearly neutral pH condition, could ideally work as a pretreatment to recalcitrant organics, which could be combined with the subsequent biological treatment without any need for pH adjustment. The present study investigated the performance of a Bio-Fenton-assisted biological process for mineralization of three typical types of PAHs. The hydrogen peroxide production, PAH removal, overall organic mineralization, and microbial community structure were comprehensively studied. The results showed that the combined process could achieve efficient chemical oxygen demand (COD) removal (88.1%) of mixed PAHs as compared to activated sludge (33.1%), where individual PAH removal efficiencies of 99.6%, 83.8%, and 91.3% were observed for naphthalene (NAP), anthracene (ANT), and pyrene (PYR), respectively, with the combined process.
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Singh, Manager R., S. Vinodh Kumar et Kuntikana Ganaraj. « Evidence of amorphous Ca-phosphate precipitate caused by bio mineralisation in 4-5th CE lime plasters of the previously submerged east coastal monument of Salvankuppam ». Mineralogia 52, no 1 (1 janvier 2022) : 19–30. http://dx.doi.org/10.2478/mipo-2021-0003.

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Abstract The lime plasters of the excavated monument of Salvankuppam, previously submerged and exposed by the Tsunami occurred in the Indian Ocean on 26th December 2004 was studied with different analytical techniques. The temple is dated 4-5th century CE. The XRF, XRD, FTIR, NMR, SEM-EDX analysis of the lime plasters evidenced particular occurrence of phosphatised bacterial remains in saline conditions. The formation of amorphous Ca-phosphate by bio mineralization was identified in the plasters by the analyses. The plasters are made of air-lime with coarse aggregates and seashells inclusion as confirmed by the thermal and chemical analysis. The microstructure and morphological investigations of mineralized microbial structures by SEM-EDX indicated the formation of amorphous Ca-phosphate. The unordered and fibrous spherulites have hardened and reduced porosity of the plaster by bio mineralization as observed through MIP analysis. The 16S rRNA sequencing has identified the Pseudomonas strains mainly responsible for the clustering of amorphous Ca-phosphate particles around the bacterial colony.
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Terzis, Dimitrios, Patrick Hicher et Lyesse Laloui. « Benefits and drawbacks of applied direct currents for soil improvement via carbonate mineralization ». E3S Web of Conferences 195 (2020) : 05007. http://dx.doi.org/10.1051/e3sconf/202019505007.

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The study presented herein adopts a new vision of the processes involved in carbonate mineralization induced by MICP from an electrochemical and crystal growth perspective. More precisely a specific line of focus refers to the species involved in the bio-chemical reactions and especially their net particle charge. By altering electro-chemical conditions via the application of direct electric currents, we observe distinctive trends related to: (i) overall reaction efficiency; (ii) carbonate mineralization/dissolution and (iii) spatial distribution of precipitates. The study introduces the concept of EA-MICP which stands for Electrically Assisted MICP as a means of improving the efficiency of soil bio-consolidation and overcoming various challenges which were previously reported in conventional MICP-based works. Results reveal both the detrimental and highly beneficial role that electric currents can hold in the complex, reactive and transport processes involved. An interesting finding is the “doped” morphology of calcite crystals, precipitated under electric fields, validated by microstructural observations.
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Zhao, Jian, Wei Li, Xin Dong et Jiying Chen. « Material Properties of Strontium Doped Bioactive Glasses/Hydroxyapatite Composite and Its Mechanism of Promoting Bone Repair ». Journal of Biomaterials and Tissue Engineering 11, no 12 (1 décembre 2021) : 2313–20. http://dx.doi.org/10.1166/jbt.2021.2853.

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Based on bioactive glasses (BG) of 58S, sol–gel method is used to prepare strontium oxide substituted bioactive glasses (SrO-BG) with different strontium content. SrO-BG and nano hydroxyapatite (HAp) composite materials were synthesized using precipitation method. The phase composition and morphologies of the prepared materials were examined by x-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The dissolution and bio-mineralization of SrO-BG and SrO-BG/HAp composites in SBF are investigated by immersion method. The effects of secretion components of macrophages regulated by strontium doped SrO-BG/HAp composites on the osteogenic differentiation (OD) of bone marrow mesenchymal stem cells (BMSCs) are analyzed. The results demonstrate that the SrO-BG can inhibit the dissolution of BG. Different proportions of SrO-BG/HAp composites show good ability to induce HAp in SBF. The bio-mineralization ability of SrO-BG/HAp composites increases with the increase of SrO-BG content. The results of dissolution behavior and bio-mineralization of SrO-BG/HAp composite show that the dissolution rate of each ion can be controlled by adjusting the content of SrO-BG in the composite, and then the degradation rate can effectively be controlled. The results of in vitro experiments show that SrO-BG/HAp composites with 2%, 5% and 8% strontium content are more effective in promoting M2 polarization of macrophages than SrO-BG/HAp composites with 0% strontium content. Among them, 5% strontium doped SrO-BG/HAp has the strongest effect on M2 polarization of macrophages, and the secretion of macrophages regulated by 5% strontium doped SrO-BG/HAp composite is more conducive to bone repair.
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García, A. J., et C. D. Reyes. « Bio-adhesive Surfaces to Promote Osteoblast Differentiation and Bone Formation ». Journal of Dental Research 84, no 5 (mai 2005) : 407–13. http://dx.doi.org/10.1177/154405910508400502.

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Binding of integrin adhesion receptors to extracellular matrix components, such as fibronectin and type I collagen, activates signaling pathways directing osteoblast survival, cell-cycle progression, gene expression, and matrix mineralization. Biomimetic strategies exploit these adhesive interactions to engineer bio-inspired surfaces that promote osteoblast adhesion and differentiation, bone formation, and osseointegration. These emerging initiatives focus on directing integrin binding through presentation of bio-adhesive motifs derived from extracellular matrices. These biomolecular approaches provide promising strategies for the development of biologically active implants and grafting substrates for enhanced bone repair.
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Richardson, C. Doc, Nancy W. Hinman et Jill R. Scott. « Evidence for biological activity in mineralization of secondary sulphate deposits in a basaltic environment : implications for the search for life in the Martian subsurface ». International Journal of Astrobiology 12, no 4 (24 juillet 2013) : 357–68. http://dx.doi.org/10.1017/s1473550413000256.

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AbstractEvidence of microbial activity associated with mineralization of secondary Na-sulphate minerals (thenardite, mirabilite) in the basaltic subsurface of Craters of the Moon National Monument (COM), Idaho were examined by scanning electron microscopy, X-ray diffraction, laser desorption Fourier transform ion cyclotron resonance mass spectrometry (LD-FTICR-MS), Fourier transform infrared spectroscopy (FTIR) and isotope ratio mass spectrometry. Peaks suggestive of bio/organic compounds were observed in the secondary Na-sulphate deposits by LD-FTICR-MS. FTIR provided additional evidence for the presence of bio/organic compounds. Sulphur fractionation was explored to assist in determining if microbes may play a role in oxidizing sulphur. The presence of bio/organic compounds associated with Na-sulphate deposits, along with the necessity of oxidizing reduced sulphur to sulphate, suggests that biological activity may be involved in the formation of these secondary minerals. The secondary Na-sulphate minerals probably form from the overlying basalt through leached sodium ions and sulphate ions produced by bio-oxidation of Fe-sulphide minerals. Since the COM basalts are one of the most comparable terrestrial analogues for their Martian counterparts, the occurrence of biological activity in the formation of sulphate minerals at COM has direct implications for the search for life on Mars. In addition, the presence of caves on Mars suggests the importance of these environments as possible locations for growth and preservation of microbial activity. Therefore, understanding the physiochemical pathways of abiotic and biotic mineralization in the COM subsurface and similar basaltic settings has direct implications for the search for extinct or extant life on Mars.
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Rohini, I., et R. Padmapriya. « Bio-Mineralization process on concrete substituted with different types of waste materials ». IOP Conference Series : Materials Science and Engineering 1070, no 1 (1 février 2021) : 012034. http://dx.doi.org/10.1088/1757-899x/1070/1/012034.

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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 ». Key Engineering Materials 280-283 (février 2007) : 1609–12. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.1609.

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The biomaterials in system CaO-P2O5-SiO2 were synthesized via sol-gel method. The biomaterials can be applied to bone reparation and bone tissue engineering scaffolds The nano-pore structure, degradability, bioactivity and bio-mineralization characteristic of the biomaterials were investigated in details using XRD, SEM/EDX, FTIR, BET and DSC/TG techniques. It was indicated that the sol-gel derived biomaterials have a higher bioactivity than that of the melt derived bioactive glasses or glass-ceramics. It just takes 4-8 hours for HCA to form on the surface of the sol-gel samples in SBF solution at 37°C. The spherical HCA crystal clusters formed on the surface of the sol-gel derived samples immersed in SBF for 8 hours have a low crystallinity. Owing to their interconnected nano-sized pores, the sol-gel samples possess much higher surface areas and the hydrous porous SiO2 gel layer containing a great amount of ºSi-OH groups can be rapidly formed on the biomterials’ surface through a quick ion exchange between H3O+ in the solution and Ca2+ in the surface of the materials. ºSi-OH groups can play a very important role in inducing formation of HCA. They make the material surfaces electronegative, which resulted in a double electrode layer formed between the samples surface and SBF solution. The double electrode layer is in favor of formation of HCA on the surface of the materials.
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Arias, José L., Andrónico Neira-Carrillo, José I. Arias, Carla Escobar, Marcia Bodero, Marcela David et María S. Fernández. « Sulfated polymers in biological mineralization : a plausible source for bio-inspired engineering ». J. Mater. Chem. 14, no 14 (2004) : 2154–60. http://dx.doi.org/10.1039/b401396d.

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Falke, M., R. Terborg, A. Kaeppel, T. Salge, J. Berlin, C. Biot et C. Slomianny. « Element Analysis by EDX for Life Science : Light Elements and Bio-Mineralization ». Microscopy and Microanalysis 19, S2 (août 2013) : 222–23. http://dx.doi.org/10.1017/s1431927613003103.

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Tampieri, Anna, Simone Sprio, Monica Sandri et Federica Valentini. « Mimicking natural bio-mineralization processes : A new tool for osteochondral scaffold development ». Trends in Biotechnology 29, no 10 (octobre 2011) : 526–35. http://dx.doi.org/10.1016/j.tibtech.2011.04.011.

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Chen, Xiaofeng, Yongchun Meng, Yuli Li et Naru Zhao. « Investigation on bio-mineralization of melt and sol–gel derived bioactive glasses ». Applied Surface Science 255, no 2 (novembre 2008) : 562–64. http://dx.doi.org/10.1016/j.apsusc.2008.06.101.

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Tang, Yufei, Cong Wu, Pu Tian, Kang Zhao et Zixiang Wu. « Fabrication and induced mineralization of bio-piezoelectric ceramic coating on titanium alloys ». Ceramics International 46, no 3 (février 2020) : 4006–14. http://dx.doi.org/10.1016/j.ceramint.2019.10.040.

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Liu, Mengdi, Jun Xia, Chee Seong Chin et Zuowei Liu. « Improving the properties of recycled aggregate pervious pavement blocks through bio-mineralization ». Construction and Building Materials 262 (novembre 2020) : 120065. http://dx.doi.org/10.1016/j.conbuildmat.2020.120065.

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Eberl, Joachim, et Horst Kisch. « Mineralization of Phenol and 4-Chlorophenol Induced by Visible Light and Assisted by Semiconducting β-Bi2O3 ». Zeitschrift für Naturforschung B 65, no 3 (1 mars 2010) : 399–404. http://dx.doi.org/10.1515/znb-2010-0325.

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Intensely yellow β -bismuth trioxide in the form of about 41 nm large crystallites has been prepared by thermal decomposition of (BiO)2CO3 at 400 ◦C. From the band gap energy of 2.3 eV obtained under the assumption of an indirect band-to-band transition and the quasi-Fermi level of −0.28±0.02 V (vs. NHE) a valence band edge position of 2.02 V is calculated. This semiconducting oxide assists a Vis light (λ ≥455 nm) aerial mineralization of the aqueous model pollutants phenol and 4-chlorophenol exhibiting maximum rates at a bismuth oxide concentration of 2.0 g L−1. In the absence of oxygen no degradation occurs indicating that β -Bi2O3 does not act as oxidizing agent. The mineralization suffers from photocorrosion of β -Bi2O3 generating a mixture of α-Bi2O3 and various bismuth carbonates as observed upon multiple use of the oxide in the mineralization of phenol.
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Gadd, M. G., J. M. Peter, D. Hnatyshin, R. Creaser, S. Gouwy et T. Fraser. « A Middle Devonian basin-scale precious metal enrichment event across northern Yukon (Canada) ». Geology 48, no 3 (3 janvier 2020) : 242–46. http://dx.doi.org/10.1130/g46874.1.

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Abstract Hyper-enriched black shale (HEBS) Ni-Mo-Zn-Pt-Pd-Au-Re mineralization is geographically widespread across the Richardson trough in northern Yukon (Canada), where it discontinuously outcrops at the regional contact between the Road River Group and overlying Canol Formation. Stratigraphic relationships indicate that the contact is Middle Devonian, but there are no precise age constraints for the HEBS. We apply Re-Os geochronology to HEBS mineralization from two localities that are 130 km apart, the Nick prospect and the Peel River showing, to date directly the age of sulfide mineralization. The Nick prospect yields an isochron age of 390.7 ± 5.1 (2σ) Ma, whereas the Peel River showing yields an isochron age of 387.5 ± 4.4 (2σ) Ma. Within error, these ages are identical and overlap with the biostratigraphically constrained age of the sedimentary host rocks, indicating that mineralization and sedimentation were coeval. Significantly, the ages of the HEBS overlap those of Middle Devonian Kačák, pumilio, and Taghanic global-scale biotic events which are characterized by eustatic sea-level rise and black shale deposition. Linkage of the Yukon HEBS to one (or more) of these bio-events indicates that sea-level rise may have been requisite to formation of basin-scale HEBS mineralization in northwestern Canada during latest Eifelian and Givetian time.
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Zheng, Hua De, Ying Jun Wang, Chun Rong Yang, Xiao Feng Chen et Na Ru Zhao. « Investigation on the Porous Biomaterial for Bone Reconstruction with Addition of Bio-Mimetic Nano-Sized Inorganic Particles ». Key Engineering Materials 336-338 (avril 2007) : 1534–37. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.1534.

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The spherical nano-sized bioactive particles in the system of CaO-P2O5-SiO2 were bio-mimetically synthesized using micro-emulsion method. The microstructures and properties of the bio- mimetic nano-materials were characterized using XRD, FTIR, SEM/EDAX and TEM techniques. It was indicated that the nano-particles possessed glassy structural characteristics. The porous composite for bone tissue reconstruction was prepared by compounding poly (hydroxybutyrate-2-co-2-hydroxyvalerate) (PHBV) and the nano-particles of bio-mimetic bioactive glasses (BMBG). Bone-like hydroxyl- carbonate-apatite (HCA) could formed on the surface of porous composite by immersing the composite in simulated body fluid (SBF) at 37°C for 8 hours. With increase of immersion time, the morphology of HCA changed from spherical into flake-like crystals. The study on cells attachment of the porous PHBV/BMBG composite proved that the material possessed satisfactory bioactivity, bio-mineralization function and cells biocompatibility.
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Vasilatos, Charalampos, Evdokia E. Kampouroglou, Ifigeneia Megremi et Maria Economou-Eliopoulos. « Bio-Geochemical Processes : Insights from Fe-Mn Mineralization in the Aegean Sea (Greece) ». Minerals 12, no 10 (16 octobre 2022) : 1303. http://dx.doi.org/10.3390/min12101303.

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In this study, we have compiled new and existing mineralogical and geochemical data on Fe-Mn mineralization from the Aegean region [Attica (Grammatiko, Legrena, and Varnavas), Evia and Milos islands], aiming to provide new insights on the genesis of Fe-Mn mineralization in that region and its potential environmental implications. A common feature of those deposits is the relatively low Cr, Co, V, Ni, Mo, and Cd content, whereas Ba, As, W, Cu, Pb, and Zn show remarkably variable values. The Mn-Fe deposits from Milos exhibit the highest tungsten content, while a positive trend between MnO and W, combined with a negative trend between MnO and Fe2O3 suggests the preference of W to Mn-minerals. The occurrence of bacterio-morphic Fe-Mn-oxides/hydroxides within Mn-Fe mineralizations in the studied region, indicates the important role of micro-organisms into redox reactions. Moreover, the presence of micro-organisms in the Fe-Mn-deposits, reflecting the presence of organic matter confirms a shallow marine environment for their deposition. A salient feature of the Varnavas and Milos Mn-Fe ores is the presence of sodium chloride coated fossilized micro-organisms, suggesting development from a solution containing relatively high Na and Cl concentrations. Furthermore, from an environmental point of view, consideration is given to the bioavailability of elements such as As, Pb, and W, related to the above-mentioned mineralizations. The high bio-accumulation factor for W (Wplant/Wsoil × 100) recorded in the Neogene sedimentary basins of Attica, related to the Grammatiko Fe-Mn mineralization, reflects the high W mobility under alkaline conditions and the potential environmental impact of similar deposits with elevated W content.
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Yang, Jun, Rui Wang, Heru Wang et Yongwei Song. « The Important Role of Dissolved Oxygen Supply Regulated by the Hydraulic Shear Force during the Biosynthesis of Iron Hydroxysulfate Minerals ». Minerals 10, no 6 (5 juin 2020) : 518. http://dx.doi.org/10.3390/min10060518.

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The severity of environmental pollution from acid mine drainage (AMD) is increasingly garnering attention. In this study, the effects of hydraulic shear forces (achieved by regulating the shaking table’s rotation speed) on Fe2+ bio-oxidation and Fe3+ hydrolytic mineralization in an acidic 9K medium-FeSO4-Acidithiobacillus ferrooxidans system (simulated AMD) are investigated. Results reveal that a higher shaking speed favors a higher oxidation rate of Fe2+, whereas a very low or high shaking speed restricts the removal of Fe3+. Shaking table rotation speeds of 120–180 rpm were preferred for biomineralization treatment in the simulated AMD. As the initial concentration of Fe2+ in the system decreased from 9.67 to 0 g/L in 40 h, the dissolved O2 (DO) in the solution dropped to its lowest concentration after 20 h and then increased to its initial level between 40 and 120 h. However, the corresponding total Fe (TFe) precipitation efficiency increased with the increasing mineralization time after 40 h. The effect of O2 supply time on biomineralization revealed that DO was mainly used in Fe2+ bio-oxidation. After Fe2+ was completely oxidized by A. ferrooxidans, the precipitation efficiency of TFe was independent of the O2 supply.
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Del Prete, Sonia, Silvia Bua, Fatmah Alasmary, Zeid AlOthman, Sylvie Tambutté, Didier Zoccola, Claudiu Supuran et Clemente Capasso. « Comparison of the Sulfonamide Inhibition Profiles of the α-Carbonic Anhydrase Isoforms (SpiCA1, SpiCA2 and SpiCA3) Encoded by the Genome of the Scleractinian Coral Stylophora pistillata ». Marine Drugs 17, no 3 (1 mars 2019) : 146. http://dx.doi.org/10.3390/md17030146.

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The ubiquitous metalloenzymes carbonic anhydrases (CAs, EC 4.2.1.1) are responsible for the reversible hydration of CO2 to bicarbonate (HCO3−) and protons (H+). Bicarbonate may subsequently generate carbonate used in many functional activities by marine organisms. CAs play a crucial role in several physiological processes, e.g., respiration, inorganic carbon transport, intra and extra-cellular pH regulation, and bio-mineralization. Multiple transcript variants and protein isoforms exist in the organisms. Recently, 16 α-CA isoforms have been identified in the coral Stylophora pistillata. Here, we focalized the interest on three coral isoforms: SpiCA1 and SpiCA2, localized in the coral-calcifying cells; and SpiCA3, expressed in the cytoplasm of the coral cell layers. The three recombinant enzymes were heterologously expressed and investigated for their inhibition profiles with sulfonamides and sulfamates. The three coral CA isoforms differ significantly in their susceptibility to inhibition with sulfonamides. This study provides new insights into the coral physiology and the comprehension of molecular mechanisms involved in the bio-mineralization processes, since CAs interact with bicarbonate transporters, accelerating the trans-membrane bicarbonate movement and modulating the pH at both sides of the plasma membranes.
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Borda-Molina, Daniel, Juan Manuel Pardo-García, José Salvador Montaña-Lara et María Mercedes Martínez-Salgado. « Influencia de la materia orgánica y Azotobacter nigricans en un cultivo de Stevia rebaudiana B ». Universitas Scientiarum 16, no 3 (1 novembre 2011) : 282. http://dx.doi.org/10.11144/javeriana.sc16-3.ioom.

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<p><strong> </strong></p> <p><strong> </strong><em>Stevia rebaudiana</em> is a plant that accumulates a non-caloric sweetener compound known as stevioside. This crop is traditionally fertilized with chemicals that are harmful for the ecosystem, forcing to find organic alternatives to mitigate this damage. <strong>Objective</strong>. To study the effect of organic matter and an <em>Azotobacter nigricans</em>-based bio-fertilizer on a <em>Stevia rebaudiana </em>plantation grown in acidic soil in the Department of Meta, Colombia. <strong>Materials and methods.</strong> Five treatments were established: T1 and T2 with the application of home organic waste compost at concentrations of 15 and 30 ton ha<sup>-1</sup>. T3 and T4 with the same compost concentrations and inoculating the<em> A. nigricans </em>bio-fertilizer. T5 contained the bio-fertilizer alone. The control consisted of the application of the Bokashi compost under the usual conditions of cultivation. Plant growth was assessed by biomass increase measured as dry weight, production, and leaf area. The physicochemical analysis of soil included: percentage of organic carbon, water content, and pH. <strong>Results. </strong>The inoculation of the bio-fertilizer produced an increase in the rate of mineralization of compost, reaching a final 4.85% of OC between 90 and 180 days after inoculation. <strong> </strong>There were significant (p&lt; 0.05) differences between biomass production with T2 (1,538 kg ha<sup>-1</sup>) and the control (477 kg ha<sup>-1</sup>). Regarding the soluble solid content, T1, T3 and T4 showed the highest °Brix values (12.4, 12.35 and 12.15, respectively). <strong>Conclusions</strong>. The concentration of 30 ton ha<sup>-1</sup> produced the highest biomass production and the application of the biofertilizer showed a positive correlation with compost mineralization and glucoside synthesis.</p> <p><strong> </strong></p> <p><strong>Key words</strong>: <em>Stevia rebaudiana</em>, bio-fertilizer, mineralization, organic carbon.</p> <p> </p><br />
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Zheng, Hua De, Ying Jun Wang, Qiang Ma, Cheng Yun Ning et Xiao Feng Chen. « Study of Bio-Mineralization of BCP with Compensation of Calcium and Phosphate Ions ». Materials Science Forum 610-613 (janvier 2009) : 1391–94. http://dx.doi.org/10.4028/www.scientific.net/msf.610-613.1391.

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In the present study, an Intelligent Multi-parameter Simulated Evaluation in vitro （IMSE system） was used to study the deposition properties of apatite formation on the surface of biphasic calcium phosphate porous ceramic (BCP) from static and dynamic r-SBF. Results showed that apatite formed on the surface of BCP from static and dynamic r-SBF differed between each other. In static r-SBF, ions were transferred by diffusion, which could not compensate the consuming of calcium ions, and mist apatite layer was formed on the surface of samples. But in the dynamic r-SBF, simulated fluid was adjusted precisely and flowed forcedly, the concentrations of ions were homogeneous; with the compensation of ions, calcium and phosphate were supersaturated, and the free energy of apatite formation was negative, bone-like apatite sheets were formed on the surface of samples.
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Ghorbani, Farnaz, Ali Zamanian, Aliasghar Behnamghader et Morteza Daliri-Joupari. « Bone-like hydroxyapatite mineralization on the bio-inspired PDA nanoparticles using microwave irradiation ». Surfaces and Interfaces 15 (juin 2019) : 38–42. http://dx.doi.org/10.1016/j.surfin.2019.01.007.

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