Synthesis and characterization of mesoporous hydroxyapatite powder by microemulsion technique

Publication date: Available online 23 May 2019Source: Journal of Materials Research and TechnologyAuthor(s): An Huang, Honglian Dai, Xiaopei Wu, Zheng Zhao, Yanzeng WuAbstractThe mesoporous hydroxyapatite (HAP) powder was synthesized by using the microemulsion (hexadecyltrimethyl ammonium bromide (CTAB)/cyclohexane/n-octyl alcohol) system. The optimal ratios of concentrations of CTAB, cyclohexane and n-octyl alcohol in the microemulsion on morphology of the HAP were studied. The effects of pHs and calcination temperatures on the phase composition of the HAP powder were discussed. The phase composition, morphology, mesoporous structure and the optical density (OD) were characterized and confirmed by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), N2 adsorption–desorption isotherms and Multiskan Spectrum, respectively. We further investigated the effect of the HAP powder with meso-structure on the proliferation of bone marrow mesenchymal stem cells (BMSCs) and MC3T3 in vitro, and in vitro study of drug release of mesoporous HAP powder. Through the optimized microemulsion system (CTAB 25 g/L/cyclohexane 125 mL/L/n-octyl alcohol 250 mL/L) at pH of 11.0, the mesoporous HAP was formed. The specific surface area of the HAP powder product is 13.62 m2/g with an average pore size of 19.56 nm after calcinating at 850 °C.
Source: Journal of Materials Research and Technology - Category: Materials Science Source Type: research

Related Links:

ConclusionWe conclude that 3DP-PLASs with 150 μm gaps can induce cellular orientations more easily than those with 200 μm gaps. In addition, 3DP-PLASs seem to improve cell adhesion after being coated with poly-l-lysine or soaked with alcohol.
Source: Journal of the Formosan Medical Association - Category: General Medicine Source Type: research
CONCLUSION: We conclude that 3DP-PLASs with 150 μm gaps can induce cellular orientations more easily than those with 200 μm gaps. In addition, 3DP-PLASs seem to improve cell adhesion after being coated with poly-l-lysine or soaked with alcohol. PMID: 31155229 [PubMed - as supplied by publisher]
Source: J Formos Med Assoc - Category: General Medicine Authors: Tags: J Formos Med Assoc Source Type: research
Filomena Corbo1†, Giacomina Brunetti2*†, Pasquale Crupi3, Sara Bortolotti4, Giuseppina Storlino4, Laura Piacente5, Alessia Carocci1, Alessia Catalano1, Gualtiero Milani1, Graziana Colaianni4, Silvia Colucci2, Maria Grano4, Carlo Franchini1, Maria Lisa Clodoveo6, Gabriele D'Amato7 and Maria Felicia Faienza5 1Department of Pharmacy-Drug science, University of Bari Aldo Moro, Bari, Italy 2Section of Human Anatomy and Histology, Department of Basic and Medical Sciences, Neurosciences and Sense Organs, University of Bari Aldo Moro, Bari, Italy 3CREA-VE, Council for Agricultural Research and Economics&ndas...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
Conclusions Several model systems are now available to characterize the MSC-tumour interplay in the TME. These offer early promise in establishing robust preclinical platforms for the identification of crucial molecular pathways and for the assessment of clinical efficacy of novel drugs to inhibit cancer development and progression. However, selection of the right model for a given study should be shaped on the purpose, and should also consider fixed biological, biochemical, and biophysical parameters according to the specific tumour type. Finally, in order to get reliable and useful results to be translated to the clinic...
Source: Frontiers in Oncology - Category: Cancer & Oncology Source Type: research
Bianca Cox1†, Maria Tsamou1†, Karen Vrijens1, Kristof Y. Neven1, Ellen Winckelmans1, Theo M. de Kok2, Michelle Plusquin1 and Tim S. Nawrot1,3* 1Center for Environmental Sciences, Hasselt University, Hasselt, Belgium 2Department of Toxicogenomics, Maastricht University, Maastricht, Netherlands 3Department of Public Health, Environment and Health Unit, Leuven University (KU Leuven), Leuven, Belgium Maternal body mass index (BMI) before pregnancy is known to affect both fetal growth and later-life health of the newborn, yet the implicated molecular mechanisms remain largely unknown. As the master reg...
Source: Frontiers in Genetics - Category: Genetics & Stem Cells Source Type: research
Geng-Hong Xia1†, Chao You1,2†, Xu-Xuan Gao1, Xiu-Li Zeng1, Jia-Jia Zhu1, Kai-Yu Xu3, Chu-Hong Tan1, Ruo-Ting Xu1, Qi-Heng Wu1, Hong-Wei Zhou3, Yan He4*‡ and Jia Yin1*‡ 1Department of Neurology, Nanfang Hospital, Southern Medical University, Guangzhou, China 2Department of Neurology, The First People's Hospital of Zunyi, Zunyi, China 3State Key Laboratory of Organ Failure Research, Division of Laboratory Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, China 4Microbiome Medicine Center, Division of Laboratory Medicine, Zhujiang Hospital, Southern Medical Univ...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
This study hypothesized that similar VOCs might be detected after HBOT. Methods: Ten healthy volunteers of the Royal Netherlands Navy underwent six HBOT sessions (95 min at 253 kPa, including three 5-min “air breaks”), i.e., on five consecutive days followed by another session after 2 days of rest. At 30 min before the dive, and at 30 min, 2 and 4 h post-dive, exhaled breath was collected and followed by PFT. Exhaled breath samples were analyzed using gas chromatography-mass spectrometry (GC-MS). After univariate tests and correlation of retention times, ion fragments could be identified using a reference data...
Source: Frontiers in Physiology - Category: Physiology Source Type: research
In this study, we showed that KSHV-infected cells induce interferon-stimulated genes (ISGs) response but not type I interferon in uninfected bystander cells using EVs. mRNA microarray analysis showed that ISGs and IRF-activating genes were prominently activated in EVs from KSHV-infected cells (KSHV EVs)-treated human endothelial cells, which were validated by RT-qPCR and western blot analysis. We also found that this response was not associated with cell death or apoptosis by virus infection. Mechanistically, the cGAS-STING pathway was linked with these KSHV EVs-mediated ISGs expressions, and mitochondrial DNA on the surfa...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
In this study, we sought to investigate whether SH0165 (serovar 5, high-virulent strain) and HN0001 (serovar 6, non-virulent strain) infection induces autophagy and the specific role of autophagy in bacterial invasion and inflammation during H. parasuis infection. Moreover, we explored the mechanism underlying autophagy regulated inflammation through inflammatory signaling cascades during H. parasuis infection. This observation could provide useful information for further understanding the role of autophagy in H. parasuis infection and improve our knowledge of new strategies against this pathogen. Materials and Methods B...
Source: Frontiers in cellular and infection microbiology - Category: Microbiology Source Type: research
This study shows that mutations affecting the DNA binding domain of IKAROS can impair the interaction with the target DNA sequence thereby preventing heterochromatin and pericentromeric localization (HC-PC) of the protein. Our results also indicate an impairment of pericentromeric localization of IKAROS by overexpression of a truncated variant, caused by an immature stop codon in IKZF1. We also describe an additional variant in TNFSF10, encoding Tumor Necrosis Factor Related Apoptosis Inducing Ligand (TRAIL), additionally presented in individuals of Family A. Our results indicate that this variant may impair the TRAIL-indu...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
More News: Alcoholism | Materials Science | PET Scan | Stem Cell Therapy | Stem Cells | Study