Disease relevance of titanium

• Our results indicate that barium titanate ceramic shows a very high degree of biocompatibility as evidenced by the absence of inflammatory or foreign body reactions at the implant-tissue interface [1].
• In order to study flow murmurs through atrial septal defects, right heart catheterization was performed on 48 patients of secundum type, four of primum type, and five of probe-patent foramen ovale, with the double-lumen phonocatheter of Lewis, at the tip of which barium titanate was mounted [2].
• The existence of Ti metal phase can promote the dehydration and decomposition of HA ceramic phase into the more stable calcium phosphate phases, such as alpha-Ca(3)(PO(4))(2) (alpha-TCP) and Ca(4)O(PO(4))(2) at high temperatures [3].

High impact information on titanium

• Size- and shape-dependent transformation of nanosized titanate into analogous anatase titania nanostructures [4].
• Phase transition between nanostructures of titanate and titanium dioxides via simple wet-chemical reactions [5].
• Direct electrochemistry of myoglobin in titanate nanotubes film [6].
• The crystal symmetries of lead hafnate titanate (Pb(HfxTi1-x)O3, PHT) powders with 0.10<or=x<or=0.50 were investigated by high-resolution neutron powder diffraction [7].
• On Ti, the numbers of FAK- and vinculin-positive focal adhesions increased continuously [8].

Biological context of titanium

• A submicron size grain lead titanate piezoelectric ceramic was used to both reduce lateral coupling and keep the electrical impedance matched close to the 50 ohm receive electronics [9].

Anatomical context of titanium

• In order to determine the effect of the surface composition, gingival fibroblasts were cultured for 14 d on polished substrate specimens of cp-titanium, TiAl6V4 and TiTa30 and examined for differences in shape [10].
• Furthermore, actin staining showed that the cells on HA poorly formed stress fibers with weak polarity, whereas the cell on Ti possessed well-defined polarized stress fibers [8].
• Islands of fibrocartilaginous tissue characterized the membrane around unstable HA implants, whereas fibrous connective tissue surrounded unstable Ti implants [11].
• The superior fixation of unstable HA implants compared with unstable Ti implants may be ascribed to the presence of fibrocartilage, a higher collagen concentration, and radiating orientation of collagen fibers in the membrane [11].
• The collagen concentration of the fibrous membranes was higher around unstable HA implants compared with Ti implants [11].

Associations of titanium with other chemical compounds

• In both sets of experiments the rapid dissolution of the barium source was observed, followed by dissolution of the titanium source before the onset of crystallization of barium titanate [12].
• After 12 weeks the mean tensile strength values were highest for polished hydroxylapatite (HAP) followed by HA > FAP (polished fluorapatite) > FA > Ti, and hydroxylapatite type coatings were found to exhibit significantly higher values than fluorapatite type coatings or titanium implants [13].
• Crystalline barium titanate nanoparticles were synthesized in solution at low temperature (70 degrees C) from acetylacetone chelated titanium complex and barium hydroxide [14].
• High-frequency needle ultrasound transducers with an aperture size of 0.4 mm were fabricated using lead magnesium niobate-lead titanate (PMN-33% PT) as the active piezoelectric material [15].
• Lattice parameters and structural phase transition of lanthanum titanate perovskite, La0.68(Ti0.95,Al0.05)O3 [16].
• A photoluminescence emission process originating from exciton states trapped in [TiO6] units was observed in anatase TiO2 and, with significantly enhanced intensity, in nanowires made of titanate nanosheets [17].

Gene context of titanium

• Crystal structural parameters (21 positional parameters and nine isotropic Debye-Waller factors) of the intermediate phase of hexagonal barium titanate (h-BaTiO3) have been refined by a structure analysis method using convergent-beam electron diffraction (CBED); this method was developed by Tsuda & Tanaka [Acta Cryst. (1999), A55, 939-954] [18].
• To verify the method, we used it to measure the R12 and R13 Kerr coefficients for a (100)-type single crystal of ferroelectric barium titanate (BaTiO3) at room temperature (23.5 degrees) [19].

Analytical, diagnostic and therapeutic context of titanium

• Real time observation of the hydrothermal crystallization of barium titanate using in situ neutron powder diffraction [12].
• The hydrothermal crystallization of barium titanate, BaTiO3, has been studied in situ by time-resolved powder neutron diffraction methods using the recently developed Oxford/ISIS hydrothermal cell [12].
• Enhanced catalytic activity of hemoglobin in organic solvents by layered titanate immobilization [20].
• Ferroelectricity in barium titanate quantum dots and wires [21].
• These positively charged SiO2/PS hybrid particles were mixed with tetra-n-butyl titanate for sol-gel reaction to directly form SiO2/PS/TiO2 multilayer core-shell hybrid microspheres [22].

References