The unique properties and numerous applications of nanocrystalline titanium dioxide (TiO2) are stimulating research on improving the existing developing new synthesis methods. In this work, we demonstrate for first time possibilities extraction–pyrolytic method (EPM) production TiO2 powders. A titanium-containing precursor (extract) was prepared by liquid–liquid extraction using valeric acid C4...

Tube-wave speed in the presence of a weakly anisotropic formation can be expressed in terms of an effective shear modulus for an equivalent isotropic formation. When combined with expressions for the speeds of the SHand quasi-SV-waves along the borehole axis, a simple inversion procedure can be obtained to determine three of the five elasticities of a transversely isotropic (TI) formation tilte...

This paper deals with the solution u to the parabolic Anderson equation ∂u/∂t = κ∆u+ξu on the lattice Zd. We consider the case where the potential ξ is time-dependent and has the form ξ(t, x) = δ0(x − Yt) with Yt being a simple random walk with jump rate 2d̺. The solution u may be interpreted as the concentration of a reactant under the influence of a single catalyst particle Yt. In the first pa...

The control of pyrocarbon Chemical Vapor Infiltration (CVI) is a key issue in the processing of high-performance C/C composites with applications in aerospace parts and braking technology. For years, the precise investigation of deposition kinetics and pyrocarbon nanometer-scale anisotropy has been rehearsed in CVD and several variants of CVI with various pore sizes, and using mostly propane, p...

With the increase in demand for plastic use, waste (WP) management remains a challenge contemporary world due to lack of sustainable efforts tackle it. The increment WPs is proportional man’s and use plastics, these come along with environmental challenges. This WPs, resulting consequences are mainly characteristic biodegradation properties plastics. Landfilling, pollution, groundwater contamin...

The properties and synthesis procedures of the nanometrically thin pyrolyzed photoresist films (PPF) and the pyrolytic carbon films (PCF) were compared, and a number of similarities were found. Closer examination showed that the optical properties of these films are almost identical; however, the DC resistance of PPF is about three times higher than that of PCF. Moreover, we observed that the w...