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Investigations of AZ91D ingots from a large number of producers have shown that porosity is always present [12].
Two of the primary features are directional grain growth from the colder mould surfaces and segregation in the liquid during the solidification process.

The TiO2 nanoparticle sizes were in the range of 6–12 nm, which was in agreement with the grain size value of 7.2 nm that was estimated by the Scherrer equation.
TiO2/GSs Nanoparticles Reduced Cell Viability and Increased LDH Release The MTT colorimetric assay is an important method for determining cytotoxicity and measuring the number of living cells and the strength of viable cell metabolism [22].

A number of attempts have been made to use absorbent and catalyst for biomass steam gasification to enhance hydrogen content in the product gas [1,7,16,17,18].
Furthermore, Nasrazadani et al. [23] and Muhamed [21] reported grain like structure for calcined limestone and synthesis CaO from cockle shell, respectively.

For these methods often require special treatment facilities with high cost, a number of alternative adsorbents regeneration methods are being researched.
In order to determine the reusability of the adsorbent, the same grains were used in consecutive adsorption–desorption–regeneration cycles.

The greater the number of electrons and ions colliding with the workpiece, the bigger the micro-hole expansion.[20] The variations of overcut for various parameters are shown in Fig. 5.It has been observed from Fig 5a that the overcut increases with the increase of gap voltage.
Machining with Cu electrode, results in fairly uniform and visible recast layer and a heat affected zone of fine grained structure.

The references are to be numbered in the order in which they are cited in the text and are to be listed at the end of the contribution under a heading References, see our example below.
[4] Sikorskii O.N.: Study of corrosion resistance of fine-grained concretes on alkali activated binders for agricultural constructions PhD thesis Kyiv 1970, 24 p

The NCs exhibit exceptional properties owing to three effects, such as small size effect, large grain boundary effect and quantum confinement effect.
Physical and chemical methods can both be employed for this, while chemical methods provide a number of benefits due to their relative simplicity.

It has proved beneficial economically because of a number of factors such as providing faster construction, reduction in site manpower, easier placing and implementation, greater freedom in design and produce better surface of finishes.
The combination of one or more mineral additives with different morphology and grain-size distribution can improve particle-packing density and reduce inter-particle friction and viscosity.

The purpose of this study is to prepare a concrete mix suitable for dam applications, by investigation of the microstructure, physical and mechanical properties, and observing the mechanism of crack sealing for a prepared number of samples containing microcapsule with different rates. 2.
By adding the percentage of ZnOMC to concrete, it was noticed that a change was made in the microstructure; an increase in the grain size, the gel expanded until it filled all the spaces.

Thus, the use of a higher w/g ratio decreases the number of nuclei per unit volume.
This may be attributed to the increase in the fineness of grains that block existing pores [7].