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Stöber et al. [6] reported a method for the preparation of monodisperse spherical silica by hydrolysis of tetraethyl orthosilicate in ethanolic medium in the presence of ammonia.
El-Sayed, and M.A.El-Sayed, Nanomedicine (London, U.K.) 2(5) (2007) 681-693
El-Sayed, Spectral properties and relaxation dynamics of surface plasmon electronic oscillations in gold and silver nanodots and nanorods, J.

Phase identification was introduced in 1938 by Hanawalt et al.
Direct methods have been adapted 10 powder data by Giaccovazzo et al.
(UK) and Harris et al.
They include the effect of crystallite size distributions by Langford el al.
(UK), the effect of lattice distortion parameters by Scardi el al.

Zinc Sulphide is an extensively studied group II-VI semiconductor with wide application in field of Photo Luminescence (PL),Electro Luminescence(EL) and Cathodo Luminescence (CL).
Zinc Sulphide is an extensively studied group II-VI semiconductor with wide application in field of Photo Luminescence (PL),Electro Luminescence (EL) and Cathodo Luminescence(CL) due to better stability compared to other chalcogenides such as ZnSe [2].
According to Ostwald ripening the increase in the particle size is due to the merging of the smaller particles into larger ones as suggested by Nanda et al. [11] and is a result of potential energy difference between small and large particles and can occur through solid state diffusion FTIR Analysis Figure 4.

The SF configuration is schematically shown in Fig. 1(b) (based on in situ EL observation and X-ray topography) and a three-dimensional schematic showing the structure of the device and the SF configuration is seen in Fig. 2(c).
Due to the limited X-ray penetration depth, only part of the bounding partial dislocations "F1" and "F2" are visible on the topograph; the invisible parts are indicated by the dashed lines in Fig. 2(b) (based on EL observation).
Comparison between the topograph and the EL of the expanding SF makes it possible to reconstruct the process that led to the fault configuration observed in Fig. 2(a).
Chen et al. also employed this orientation contrast mechanism to successfully interpret TSD/MP images in grazing-incidence geometry enabling determination of their dislocation sense [7,8].
Huang et al. [9] recently explained the contrast variation of BPDs observed in SiC back-reflection topographs based on this orientation contrast mechanism.

The effects of equal channel angular pressing (ECAP), further heat treatment and rolling on the structure and room temperature mechanical properties of the commercial aluminum alloys 6061 (Al-0.9Mg-0.7Si) and 1560 (Al-6.5Mg-0.6Mn) were investigated.
Fig.1 TEM microstructure of the 6061 alloy after ECAP State YS, MPа UTS, МPа El, % ECAP 386 434 11 ECAP+ ageing at 130°C, 24 h. 434 470 10 ECAP + ageing at 130ºC, 24 h. + cold rolling 15 % 475 500 8 T6 268 365 25 Table 1 Room temperature tensile properties of the 6061 alloy The DSC profiles of the alloy after quenching and further ECAP are presented in Figure 2.
The following annealing at 200ºС led to a weak grain coarsening and softening of UFG alloy, but its ductility increased by more than 1.5 times (Table 2). 200nm b a 100nm c Fig.5 TEM microstructures of the 1560 alloy after ECAP (a), further cold rolling by 20 % (b) and rolling by 90 % at 120°C (c) State YS, MPа UTS, МPа El, % ECAP 375 467 10 ECAP+ annealing 200ºC, 8 h. 320 430 16 ECAP + annealing 200ºC, 2 h. + cold rolling 20 % 432 505 6 ECAP + annealing 200ºC, 2 h. + rolling 90 % at 120ºC 540 635 4 Н 320 420 10 Table 2 Room temperature tensile properties of the 1560 alloy Fig. 4 Precipitates of the strengthening β' (Mg2Si) phase after ECAP and further aging at 130°C, 24 hs (a) and conventional treatment T6 (b).
Conclusions Comparative evaluation of the mechanical properties of the 6061 and 1560 Al alloys at room temperature after ECAP and post-ECAP processing and after conventional hardening treatments was conducted.

El-Hofy Physics Department, Faculty of Science Menoufia University, Shebin El Koom Egypt E-mail elhofy2000@yahoo.com Keywords: ZnO-Mo ceramic Doped Bi, microstructure, grain boundary defects, non- ohmic characteristics, voltage switching Abstract.
Al Abdullah: Sil.
El-Hofy: Defect and diffusion Forum Vol. 242-244 (2005), p. 107 [23] C.

The values of lattice spacing, d, obtained were matched with phases based on Al, Mg, Al-Mg, Mg-O and Al-O systems.
Smooth bar tensile properties of the extruded Al-Mg and Al-Mg/Al2O3 samples were determined in accordance with ASTM test method E8M-96.
Table 1 Density, porosity and tensile properties of Al-Mg and Al-Mg/Al2O3 samples.
Material Mg [wt. %] Al2O3 [wt. %] Density [g/cm 3] Porosity [vol. %] E [GPa] 0.2% YS [MPa] UTS [MPa] Failure Strain [%EL] Al-3.8Mg 3.79 - 2.641 ± 0.005 0.056 70 219 ± 8 320 ± 9 11.8 ± 0.8 Al-1.6Mg/Al2O3 1.56 1.00 2.696 ± 0.011 0.075 71 231 ± 6 264 ± 6 8.7 ± 0.5 Al-2.9Mg/Al2O3 2.94 1.21 2.669 ± 0.009 0.039 73 272 ± 4 350 ± 26 6.1 ± 1.1 Al-3.4Mg/Al2O3 3.42 1.40 2.662 ± 0.009 0.114 75 302 ± 3 363 ± 25 6.6 ± 0.6 Results of the density measurements are shown in Table 1.
(a) FESEM micrograph of Al-3.4Mg/Al2O3 showing distribution of reinforcement, (b) SEM micrograph of Al-3.4Mg/Al2O3 showing grain morphology, (c) SEM micrograph of Al-3.4Mg/Al2O3 showing distribution of secondary phase.

Pacheco-Malagón et al. [5] proposed the removal mechanism as a depolymerization process.
All these species interact with Al–O, and AlOH groups in the catalyst support.
El-Shamy, H.A.
El Sayed, A.A.
Abd El Rahman, Hydrotreating of waste lube oil by rejuvenated spent hydrotreating catalyst, Egypt.

In the first part of the project, the production line of structural elements of laminated bamboo guadua was developed (Cortes et al. [1]).
The second part of the project included the test of samples with four different types of adhesives (Cortes et al. [2]) to define the adhesive that presented adequate mechanical behaviour to be used in the construction and to determine the mechanical properties of the material; the test of structural elements such as beams (Hackmayer et al. [3]), columns (Alvarado et al. [4]) and panels (Gonzalez et al. [5]) to find the design stresses and elastic values and the tests of frames with two types of bracing under lateral load (Luna & Takeuchi [6]).
Structural design elements The structural design of elements was based on the allowable stress method, where the values of allowable stress were determined by the strength values found in different mechanical tests of samples (Cortes et al. [2]), beams (Hackmayer et al. [3]) and columns (Alvarado et al. [4]) shown in Table 1.
El Cairo.
El Cairo.

El-Batal, M.I.A.
El-Sayyad, Sh.
El-Okr, Antimicrobial activity of metal-substituted cobalt ferrite nanoparticles synthesized by sol–gel technique, Particuology, 40 (2018) 141-151
Rabbani, F,Vajhadin, et al., Anti‐bacterial and wound healing‐promoting effects of zinc ferrite nanoparticles,  J Nanobiotechnol 19 (2021) 38
Fajaroh, et al., Synthesis of ZnFe2O4 Nanoparticles with PEG 6000 and Their Potential Application for Adsorbent, IOP Conf.