Disease relevance of dioxozirconium

• Using this new zirconia-based phase, a purification protocol is developed for the efficient removal of Escherichia coli 0111:B4 LPS from bovine insulin samples [1].
• Recovery of leukoregulin proliferation inhibitory activity directed against RPMI 2650 epidermoid carcinoma cells was 90% from the silica, 88% from the agarose and 35% from the zirconia stabilized silica columns [2].
• Of 12 hips with acetabular osteolysis, six had a 28 mm cobalt-chrome femoral head and the remaining six a 28 mm zirconia head [3].
• However, under severe microseparation conditions representative of greater joint laxity, the wear rate of zirconia against alumina increased by 2 orders of magnitude, producing severe wear and, in one case, femoral head fracture [4].
• MATERIAL AND METHODS: Thirty pulpless teeth in 22 patients were treated with zirconia posts [5].

High impact information on dioxozirconium

• In the absence of these ions, the exopolyphosphatase binds to polyphosphate but does not degrade it, allowing affinity purification of the enzyme on a polyphosphate-modified zirconia support. o-Vanadate, Cu2+, and Ca2+ are effective inhibitors of the exopolyphosphatase [6].
• In situ solid-state NMR spectroscopy was employed to study the kinetics of hydrogen/deuterium exchange and scrambling as well as (13)C scrambling reactions of labeled propane over Al(2)O(3)-promoted sulfated zirconia (SZA) catalyst under mild conditions (30-102 degrees C) [7].
• Hydrodynamic flow and electroosmotic flow in zirconia-packed capillaries [8].
• As for native zirconia, the EOF is pH-dependent and the pI is close to pH 5 [8].
• In zirconia-coated capillaries the zeta-potential can be tuned from -50 to +100 mV depending on the composition of the electrolyte [9].

Chemical compound and disease context of dioxozirconium

• Induction of malignant fibrous histiocytoma in female Fisher rats by implantation of cyanoacrylate, zirconia, polyvinyl chloride or silicone [10].

Biological context of dioxozirconium

• A highly active and stable zirconia supported 12-tungstophosphoric acid catalyst is found to be 2-3 times more active in benzylation and acylation reactions than a tungstated zirconia catalyst [11].
• Lifetime "nose-only" inhalation studies were conducted in rats using four types of refractory ceramic fibers (FCF), 1 micron in diameter x 22 to 26 microns length: High Purity, Kaolin, Zirconia, and After-Service; and on hamsters using Kaolin RCF [12].
• The biocompatibility and osseointegration of zirconia (ZrO(2)), either coated with RKKP bioglazeor uncoated, were evaluated in vitro and in vivo [13].
• The utilisation of organosilanes to introduce active chemical groups onto zirconia surfaces, suitable for the subsequent immobilisation of proteins or other biomimetic ligands, is described [14].
• Zirconia-based column high-performance liquid chromatography/atmospheric pressure photoionization tandem mass spectrometric analyses of drug molecules in rat plasma [15].

Anatomical context of dioxozirconium

• In the present study, we examined whether aluminum oxide (Al2O3), zirconium oxide (ZrO2), and PMMA particles exert effects on osteoblast proliferation, phenotypic expression, and local factor production, and if so, whether the effects were specific to the particle type [16].
• Confocal Raman piezo-spectroscopy has been used for the quantitative assessments of phase transformation and residual stresses in zirconia made artificial hip joints [17].
• Activity of plasma sprayed yttria stabilized zirconia reinforced hydroxyapatite/Ti-6Al-4V composite coatings in simulated body fluid [18].
• Cell proliferation kinetic and total protein synthesis in osteoblasts with zirconia or alumina were similar to that observed in control cells cultured on glass coverslips [19].
• Biological reaction to alumina, zirconia, titanium and polyethylene particles implanted onto murine calvaria [20].

Associations of dioxozirconium with other chemical compounds

• Acido-basic properties of zirconia can be used to control the EOF even if the zirconia particles were coated by polybutadiene [8].
• A comparative study of the chromatographic selectivity of polystyrene-coated zirconia and related reversed-phase materials [21].
• An eluotropic scale of mobile-phase strength for ligand-exchange/ion-exchange chromatography on zirconia has been developed which ranks the overall elution strength of a variety of Lewis bases in terms of their ability to elute a wide variety of benzoic acid derivatives [22].
• We synthesized a novel aromatic polymer-coated zirconia-based RPLC stationary phase by chemical adsorption of a copolymer of chloromethylstyrene and diethoxymethylvinylsilane onto zirconia (CMS/VMS-ZrO2) [23].
• Purified boveine growth hormone labeled enzymatically with iodine-125 was covalently coupled to cyanogen bromide activated Sepharose 4B gel and to diazotized zirconia-clad glass beads [24].

Gene context of dioxozirconium

• Furthermore, MMP-2 mRNA expression was decreased by titanium and increased by alumina whereas zirconia did not have any significant effect [25].
• Conversely, MMP-9 mRNA expression was stimulated by titanium but decreased with zirconia, whereas alumina induced no significant changes [25].
• First either mycobacterial primary transformants or propagated cultures were lysed in a mini-bead beater using zirconia beads and the lysate thus obtained was used to transform E. coli recA mutant cells [26].
• We compare PEZ with inorganic phosphate-modified zirconia to show increased efficiency, as well as unique selectivities for chromatography of proteins on the chelator-modified surface [27].
• However, this is at the expense of a portion of the two-dimensional peak capacity displayed by the C18-carbon clad zirconia system [28].

Analytical, diagnostic and therapeutic context of dioxozirconium

• Accurate neutron powder diffraction experiments at several temperatures allow one to monitor the reconstructive tetragonal to monoclinic phase transition as a function of the size of zirconia nanoparticles [29].
• Neutron diffraction study of the size-induced tetragonal to monoclinic phase transition in zirconia nanocrystals [29].
• Synthesis and evaluation of an aromatic polymer-coated zirconia for reversed-phase liquid chromatography [23].
• New zirconia-based polymeric cation-exchange HPLC stationary phases have been developed for protein separations [30].
• Previously, we reported on the properties of a carbon surface prepared by vapor deposition on porous zirconia microspheres [31].

References