Hierarchical macro-mesoporous silica materials co-incorporated with Cr and Ti 12 (MM-Si-Cr-Ti) were directly synthesized by adopting close-packed array of polystyrene 13 microsphere as hard template for macropore through a simple soaking-calcination way, where 14 the Si/Ti ratio was fixed at 200 and Si/Cr ratio varied from 200-10. Ti specie is highly dispersed 15 in the porous matrix and Cr spe...

BACKGROUND Plasma-spray deposition of hydroxyapatite on titanium (Ti) has proven to be a suboptimal solution to improve orthopedic-implant success rates, as demonstrated by the increasing number of orthopedic revision surgeries due to infection, implant loosening, and a myriad of other reasons. This could be in part due to the high heat involved during plasma-spray deposition, which significant...

Bulk nanocrystalline Ti bars (Grade 4, Φ4 × 3000 mm(3)) were massively fabricated by equal channel angular pressing (ECAP) via follow-up conform scheme with the microcrystalline CP Ti as raw material. Homogeneous nanostructured crystals with the average grain size of 250 nm were identified for the ECAPed Ti, with extremely high tensile/fatigue strength (around 1240/620 MPa) and adorable elongat...

Combustion synthesis has been used to produce Fe-(Ti,W)C composites. A simple reactor was designed which made it possible to ignite the samples under controlled atmosphere. Samples with different W/Ti ratio were ingnited under argon atmosphere by an electric arc and a self-propagating reaction was initiated in each sample. Different composites such as WC in Fe-Ti matrix, WC+(Ti,W)C in Fe matrix...

Protein adsorption onto titanium (Ti) or zirconia (ZrO2) was evaluated using a 27 MHz quartz crystal microbalance (QCM). As proteins, fibronectin (Fn), a cell adhesive protein, and albumin (Alb), a cell adhesion-inhibiting protein, were evaluated. The Ti and ZrO2 sensors for QCM were characterized by atomic force microscopy and electron probe microanalysis observation, measurement of contact an...

Combustion synthesis has been used to produce Fe-(Ti,W)C composites. A simple reactor was designed which made it possible to ignite the samples under controlled atmosphere. Samples with different W/Ti ratio were ingnited under argon atmosphere by an electric arc and a self-propagating reaction was initiated in each sample. Different composites such as WC in Fe-Ti matrix, WC+(Ti,W)C in Fe matrix...

The growth behavior and enhanced field emission properties of multiwalled carbon nanotubes were investigated using Ti as an underlayer and over layer. Ti of 10 nm thickness was deposited underneath Fe catalyst and their interaction behavior was observed for growth of carbon nanotubes. It was observed that underlayer deposition of Ti improves the growth of CNTs by acting as a barrier. In the oth...

Recent studies have shown that host-reactive interleukin2 (IL-2)-secreting donor T lymphocytes (TI) are critically involved in the development of acute graft-versus-host disease (GVHD) after allogeneic HLA-identical sibling bone marrow transplantation (BMT). To further characterize the responding TI, we determined the frequency of pretransplant IL-2-secreting TI-precursors (TI-p) between eight ...

The oxidation state of titanium in titanium dioxide is commonly assumed to be +4. This assignment is based on the ionic approximation and is used ubiquitously to rationalize phenomena observed with TiO2. It implies a charge state +4 and that no further oxidation of the metal center is possible. We present a comprehensive electronic structure investigation of Ti ions, TiO2 molecules, and TiO2 bu...

In this paper, the surface modification of titanium alloys Ti-15Mo, Ti-13Nb-13Zr, and Ti-6Al-7Nb is presented as a material for dental implants. The conditions of the plasma electrolytic oxidation process and alkali treatment were designed in this way to enhance the biological properties of the surface of promising Ti alloys. The differences in their surface morphology and, consequently, in the...