Single and bimetallic nanoparticles-supported NaY zeolite were prepared using NaBH4 as reducing agent. Single platinum, copper and palladium nanoparticles were supported on NaY. Bimetallic systems were prepared using copper as common metal in PtCuY and PdCuY. The samples were investigated by different spectroscopic techniques such as ICP, XRD, FTIR, and TEM. The surface texture parameters were measured by N2 adsorption at 77 K. TEM images proved the formation of Pt, Cu and Pd metals nanoparticles on NaY support with particle size of 14, 41 and 50 nm, respectively. However, the bimetallic nanoparticle size decreased to 6 and 25 nm in PtCuY and PdCuY, respectively.
The activity of the prepared nanomaterials towards the reduction of p-nitrophenol (PNP) by NaBH4 showed that the catalytic activity for single metals was in the order of CuY > PdY > PtY. The activity of copper-promoted catalysts towards the reduction of PNP exhibited superior activity compared to single PtY or PdY catalysts. However, the activity of binary systems PdCuY and PtCuY was 5 and 14 times more than single PtY and PdY, respectively. The antitumor activity of the prepared systems was investigated against hepatocarcinoma. Copper nanoparticles showed the highest activity, moreover, Cu promoted the activity of the system when it is mixed with platinum nanoparticles.

This study investigated the microstructure and mechanical properties of flash butt welded AISI
304, AISI 430 stainless steels and AISI 1050 steel by comparing hardness, tensile strength
values and microstructural features of specimen pairs. Flash-butt welding parameters were kept
constant during test runs. The aim of the study was to elicit useful information for
manufacturers who flash butt weld AISI 304, AISI 430 stainless steels and AISI 1050 steel.
Results indicate that the highest hardness values of AISI 304 and AISI 1050 steels were in the
heat affected zone (HAZ) while hardness values of AISI 430 stainless steel declined in HAZ.
Results also indicate that hardness and tensile strength values of AISI 1050-welded specimen
improved.

Background and objective: Periodontitis is a common, chronic inflammatory disease characterized by formation of a periodontal pocket and can lead to tooth loss. Several studies found increase in serum C- reactive protein (CRP) and malondialdehyde (MDA) in patients with periodontitis, while alkaline phosphatase (ALP) showed a decrease. The present study was aimed to investigate and evaluate the effects of eicosapentaenoic acid (EPA) on ligature induced periodontitis in rats through the biochemical analysis for rat’s serum level of CRP, ALP and MDA.
Methods: Periodontitis was induced for the studied animals by ligation around the upper central incisor. Twenty five animals were used as a control and gavaged by water only, and one hundred animals with the induced periodontitis were divided into four equal groups according to the treatment used which was started at time of ligation removal: Water (P/W), scaling/root planing (P/SRP), 60mg/kg EPA(P/EPA), and scaling/root planing together with EPA(P/SRP+EPA). Blood was taken by cardiac puncture, after three hours, 24 hours, three days, one week and two weeks for biochemical analysis.
Results: The P/SRP+EPA treatment group showed significant decrease (p<0.05) in serum CRP, significant increase in serum ALP, significant decrease in serum MDA after one week, three days, and three hours respectively in comparison with the P/W treatment group.
Conclusion: The treatment by SRP with 60mg/kg EPA is better than each one alone and can be used for treatment of periodontitis.

Inorganic arsenic is involved in the generation of reactive oxygen species. These ROS play a significant role in liver damages, kidney dysfunction and in many other diseases as well. Nrf2 is a regulator of defence system and it upregulates the expression of target genes and neutralize the ROS. In the present study, mouse model was administrated with sodium arenite doses 20mg/kg and 10mg/kg also underwent swimming exercise for about 8 weeks regularly. Exercise has a protective role and it activates the Nrf2 signalling pathway which have ability to fight against the oxidative stress caused by the arsenic metal. Results from ALT, AST and BUN have depicted that mouse group administrated with sodium arenite have shown more severe pathological damages in liver as compared to the other groups. Furthermore, metal estimation was performed by ICP spectrometry which has indicated that dose groups have higher level of arsenic in liver than exercise group. On the other hand, in (Exercise + Dose) groups’ catalase level, glutathione level and expression of two antioxidant genes NQO-1 and HO-1 was higher than the dose group. Hence, this work demonstrated that physical activities help in the activation of the Nrf2 pathway to alleviate arsenic induced damages.