The effect of heat treatment time on the formation of forsterite (Mg2SiO4)

In this work, phase pure forsterite (Mg2SiO4) powder was synthesized via solid-state method and heat treatment stage. X-ray diffraction analysis was conducted to investigate on the phase purity of forsterite powder. The synthesized powder were heat treated at 1200 oC for 1 min, 1 hour and 2 hours with ramping rate of 10 oC/min. Decomposition was observed for powder heat treated for 1 min. Periclase and enstatite peak were detected as a form of secondary phases. 1 and 2 hours of holding during heat treatment produced phase pure forsterite with a difference of improved intensity which indicated that there was enhancement towards the crystalline structure of forsterite powder. SEM micrograph was carried out to show the morphology of the obtained forsterite powder. The powders are agglomerated with various sizes was observed.

The effects of calcium-to-phosphorus ratio on the densification and mechanical properties of hydroxyapatite ceramic

In this work, hydroxyapatite (HA) powders were synthesized using calcium hydroxide Ca(OH)(2) and orthophosphoric acid H3PO4 via wet chemical precipitation method in aqueous medium. Calcium-to-phosphorus (Ca/P) ratio was set to 1.57, 1.67, 1.87 that yield calcium-deficient HA, stoichiometric HA, and calcium-rich HA, respectively. These synthesized HA powders (having different Ca/P ratio) were characterized in terms of particle size and microstructural examination. Then, the densification and mechanical properties of the calcium-deficient HA, stoichiometric HA, and calcium-rich HA were evaluated from 1000 to 1350 degrees C. Experimental results have shown that no decomposition of hydroxyapatite phase was observed for stoichiometric HA (Ca/P = 1.67) and calcium-deficient HA (Ca/P = 1.57) despite sintered at high temperature of 1300 degrees C. However, calcium oxide (CaO) was detected for calcium-rich HA (Ca/P = 1.87) when samples sintered at the same temperature. The study revealed that the highest mechanical properties were found in stoichiometric HA samples sintered at 1100-1150 degrees C, having relative density of similar to 99.8, Young's modulus of similar to 120 GPa, Vickers hardness of similar to 7.23 GPa, and fracture toughness of similar to 1.22 MPam(1/2

The effect of sintering ramp rate on the sinterability of forsterite ceramics

In the present work, pure forsterite (Mg2SiO4) powder was successfully synthesised via ball milling and subsequent heat treatment as an evident from X-ray diffraction analysis. The synthesised powder were formed by powder agglomerates that were made up of loosely packed fine particles. Then, the forsterite green bodies were sintered at 1200 and 1400 degrees C with two different ramp rates (2 and 10 degrees C per minute) via conventional pressureless sintering. No decomposition of forsterite phase was observed at both ramp rates. This study revealed that lower ramp rate (2 degrees C per minute) possessed minor improvement on the mechanical properties only at lower sintering temperature (1200 degrees C), whereas 10 degrees C per minute ramp rate gave a significant enhancement on the mechanical properties of forsterite at 1400 degrees C. A high fracture toughness of similar to 4.9 MPam(1/2) and Vickers hardness of similar to 7.1 GPa were obtained for forsterite samples sintered at 1400 degrees C with a ramp rate of 10 degrees C per minute

Bleb related infections: Clinical characteristics,risk factors,and outcomes in an Asian population

10.2147/OPTH.S118809Clinical Ophthalmology102303-230

Functional genomics identifies specific vulnerabilities in PTEN-deficient breast cancer

10.1186/s13058-018-0949-3Breast Cancer Research2012

Diurnal biomarkers reveal key photosynthetic genes associated with increased oil palm yield

10.1371/journal.pone.0213591PLoS ONE143e021359

Measuring the methylome in clinical samples: Improved processing of the infinium human methylation450 beadchip array

10.4161/epi.22102Epigenetics710Jan-15GUSTO (Growing up towards Healthy Outcomes

Vesicles-on-a-chip: A universal microfluidic platform for the assembly of liposomes and polymersomes

In this study, we present a PDMS-based microfluidic platform for the fabrication of both liposomes and polymersomes. Based on a double-emulsion template formed in flow-focusing configuration, monodisperse liposomes and polymersomes are produced in a controlled manner after solvent extraction. Both types of vesicles can be formed from the exact same combination of fluids and are stable for at least three months under ambient storage conditions. By tuning the flow rates of the different fluid phases in the flow-focusing microfluidic design, the size of the liposomes and polymersomes can be varied over atleast one order of magnitude. This method offers a versatile tool for future studies, e.g., involving the encapsulation of biological agents and the functionalization of artificial cell membranes, and might also be applicable for the controlled fabrication of hybrid vesicles