In this paper, we present the results aimed at assessing the performance of two varieties of LiF detectors (LiF:Mg,Ti and LiF:Mg,Cu,P, of the EXTRAD type), relatively to reproducibility, detection threshold and angular dependence criteria defined in the ISO 12794:2000 Standard and other documents. The fading properties of these two dosemeter varieties were also investigated. In all experiments,...

OBJECTIVES Ti, which is biocompatible and resistant to corrosion, is widely used for dental implants, particularly in patients allergic to other materials. However, numerous studies have reported on Ti allergy and the in vitro corrosion of Ti. This study investigated the conditions that promote the elution of Ti ions from Ti implants. METHODS Specimens of commercially pure Ti, pure nickel, a ...

We report on the effect of repetition rate on the formation and surface texture of the laser induced homogenous microstructures. Different microstructures were micromachined on copper (Cu) and titanium (Ti) using femtosecond pulses at 1 and 10 kHz. We studied the effect of the repetition rate on structure formation by comparing the threshold accumulated pulse ( F Σ p u l s e ) values and the ef...

Water-miscible alkylimidazolium ionic liquids (ILs) are "green" co-solvents for laccase catalysis, but generally inhibit enzyme activity. Here, we present novel insights into inhibition mechanisms by a combination of enzyme kinetics analysis and molecular simulation. Alkylimidazolium cations competitively bound to the TI Cu active pocket in the laccase through hydrophobic interactions. Cations ...

Anatase TiO2 nanosheets (NSs) with exposed {001} facets have been widely used because of their high activity and particular surface atomic configuration. However, investigations on their biotoxicity are rare. In this study, bioaccumulation of five different TiO2 (with 10%, 61%, 71%, 74% and 78% exposed {001} facets), as well as copper and enzyme activities in Daphnia magna, are systematically i...

Abstract In order to study the influence of carbon nanotubes (CNTs) as a source on microstructure in-situ synthesized TiC in Cu melts, CNTs and Ti powders were introduced into melted prepare TiC-reinforced matrix composites. The Ti/C ratio Si microstructures properties composites also examined. It is found that can be effectively wetted through Ti-C reaction successfully melt synthesize TiC. ex...

This study examined the effect of alumina air-abrasion with different pressure on bonding between an acrylic resin and casting alloys. Disk specimens (8 and 10 mm in diameter) were cast from a silver-palladium-copper-gold (Ag-Pd-Cu-Au, Castwell M.C.12) alloy and a titanium-aluminum-niobium alloy (Ti-6Al-7Nb, T-Alloy Tough). The disks were air-abraded with alumina particles (50-70 microm) under ...

The influence of colour type, sex and age (ontogenetic stage of fur cycle) on the concentration of As, Br, Ca, Cl, Co, Cr, Cu, Fe, K, Mn, P, Pb, Rb, S, Se, Sr, Ti, V, Zn, and Zr in nutria fur was studied in two body areas – the back (dorsal) and the belly (ventral). The concentration of elements was determined by the method of disperse roentgen fluorescent spectrometry. The results were evaluat...