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Therefore, the solubility of the ilmenite ore in sulfuric acid environment is one of the key factors to obtain the desired TiO2 particles.
Mazzocchitti et al. [10] studied silicon and aluminum removal from ilmenite concentrates by alkaline leaching that caustic leaching of ilmenite concentrates resulted in the removal of silicon, as well as of aluminum, without affecting the contents of titanium and iron.
The solubility of a substance fundamentally depends on the physical and chemical properties of the used solute and solvent as well as on temperature, pressure and the pH of the solution.
[6] Sasikumar, C., Rao, D.S., Srikanth, S., Ravikumar, B.: Effect of mechanical activation on the kinetics of sulfuric leaching of beach sand ilmenite from Orissa, India, Hydrometallurgy Vol. 75 (2004), p. 189 – 204

It concerns knowledge that was pre-defined by domain experts (that affect complex object diagnostics) or processes for which the development of numerical diagnostic models and object models is not sufficient or possible.
The uncertainty can occur due to various factors that influence the results of data acquisition process.
The main factors can be · irrelevant data (insufficiently dependent on the state of the object), · approximate data (expressed in a qualitative manner), · contradictory data (distinct opinions of specialists), · inaccurate data (measurement errors), · incomplete data, · incomprehensible (expressed in an ambiguous manner).
Research on this particular subject has showed that constructing complex statements of an excessive number of variants does not lead to obtaining better reasoning results but increasing the number of necessary parameters, e.g. the size of conditional probability tables used with belief networks which worsens generic properties of such models.
Developing an unequivocal and semantically consistent knowledge base is one of the most important stages in the diagnostic system design process and one that affects the system efficiency.

However, from the viewpoint of soft tissue integration, it remains to be elucidated whether or not surface topography affects the soft tissue attachment around implants.
Under systemic anesthesia at 4 weeks after implantation, cotton ball was immersed in HRP dissolved in isotonic saline (50 mg/ml), and then laid on the gingival margin around the implant body without imposing any mechanical stress.
In addition, surface topography is reported to affect the collagen fiber orientation in the connective tissue.
Considering previous reports and our results, we can speculate that soft tissue cell response to titanium surface itself is not the dominant factor for sealing capability against foreign body invasion around dental implant.
Conclusions From the viewpoint of the prevention of foreign substance invasion, soft tissue around Rs implants showed stronger barrier property than that around Ms implants.

Test results show that the properties of RAP improved with GSA treatment.
The properties of RAP are largely dependent on the properties of the constituent materials and asphalt concrete type used in the old pavement.
Research has established typical range of particle size distribution, physical, chemical, engineering and mechanical properties of RAP [2,4,5].
Little, Evaluation of Structural Properties of Lime Stabilized Soils and Aggregates, Summary of Findings Prepared for National Lime Association, Vol. 1, 1999, 97 p
Osinubi, Influence of compaction delay on the properties of cement stabilized lateritic soil.

Introduction Age-hardenable Al-Mg-Si alloys have attractive properties such as good formability and high corrosion resistance.
The Al-Mg-Si alloys are well known to be hardened during a paint baking process at around 170 °C for 1.2 ks in the automobile manufacturing process, resulting in the improved mechanical strength.
This is the natural aging and results in the positive or negative effect on the bake-hardening(BH) response[2,3].The complicated changes of the nano or micro scale structures in the matrix such as nanoclusters or GP zones during natural aging markedly affect the BH response[4].
Based on these results, it is clarified that the Mg/Si ratio of the alloy composition is a significantly important factor in the nanocluster formation.
The electrical resistivity is strongly affected by the amount of solute atoms in the matrix due to the nanocluster formation [14].

Meanwhile, a higher absorbed dose can result in the HDPE particle decomposition, affecting their mechanical properties.
The degree of non-linearity between the dissolved ions concentrations and the adsorption was tended to from the heterogeneity factor (1/n).

Combination of small size and high Q factor empowers these devices with excellent detection capability [4, 5].
Modeling nanoparticles by a layer around the ring, running the simulation, and then changing its thickness with the corresponding refraction index of the particles will affect the resonance response compared to the resonator without the layer.
The distance between the ring and straight waveguides, where the coupling effect takes place, has been optimized as 1.20 µm based on the Lorentzian line intensity, iii) Material properties have been specified such that refraction index for the core and cladding part of the resonator fiber was set to be 2.5 and 1.5, respectively, iv) Extremely fine-size triangular mesh has been chosen to perform a detailed computing through finite element method, v) The simulations have been run sequentially to determine the optimum ring size (ring radius ranging from 83.00 µm to 83.01 µm with constant RI), titanium dioxide nanoparticles (ranging from 10 nm to 100 nm with effective RI) , and protein molecules (ranging from 10 nm to 100 nm with effective RI) using Yamaguchi model approximation for effective refractive index calculations, and vi) The simulation results have been processed by Matlab software tool to create the corresponding graphs.
The impact can be seen more clearly from the following expression, ∆λrλr=ΔRR+Δneffneff (2) Increasing the radius of the ring leads to a red shift in the position of the affected resonance wavelength.
It is also worth mentioning that the challenges for reliable optical micro-resonator sensors exist including i) the sensitivity of resonance frequency to temperature and refractive index fluctuations, ii) control of the distance between the resonator and the straight waveguide, and iii) fabrication of integrated chip-scale devices with excellent mechanical stability.

It is considered that Ostwald ripening rate of precipitates is also an important factor in controlling abnormal grain growth in addition to the amount and size of precipitates and austenite grain size, which were parameters in the Gladman's theory on abnormal grain growth behavior.
Introduction Machine parts like gears and bearings are carburized to improve anti-fatigue property, wear resistant and so on.
Specimens are heat-treated at high temperature for long time to be carburized, therefore abnormal grain growth could occur and the mechanical properties like toughness would be depressed.
In these parameters, former three affect abnormal grain growth behavior through the austenite grain size after reverse transformation.

The FATT50 (the fracture appearance transition temperature) of the rotors was predicted as a function of ratio of the two peak current densities (Ipr / Ip ) tested by electrochemical potentiodynamic reaction method, temperature of electrolyte, J-factor and grain size ( N ).
The peak current densities were affected by the grain size parameter N of the material and the temperature T at which the electrochemical polarization test was carried out.
Since all the input independent variables (Ipr / Ip ,T, J-factor and N) of the model obtained by BNN can be obtained by a nondestructive test or from the manufacture report of the steam turbine rotor, this model can be used as a nondestructive method to predict temper embrittlement of in-service turbine rotors.
The use of electrochemical and mechanical property correlations to monitor the degradation of Cr-Mo-V turbine casing steel.

The corrosion properties were investigated by climatic corrosion tests (VDA 621-415) and immersion testing in 0.1M NaCl solution at a pH of 7.5.
Taking into account the linear regions of both diagrams, the combination AZ91 HP + EN AW 5083 showed superior corrosion properties in 0.1M NaCl solution in comparison to AM50 HP + EN AW 6082.
The predominant factor for the corrosion properties of these galvanic couplings is supposed to be the difference of standard potentials.
In contrast, the alternating tested coated segments of the standard-profile exhibited effective anticorrosive properties.
Superior corrosion properties of the AZ91 HP + EN AW 5083 combination were found, due to the higher Al and Mg contents in the cast and wrought alloys respectively, resulting in lower galvanic activity.