Tailoring conductive polymers with inorganic photocatalysts, which provide photoinduced electron-hole generation, have significantly enhanced composites leading to excellent photoelectrodes. In this work, MnFe₂O₄ nanoparticles prepared by a hydrothermal method were combined with polyaniline to prepare mixed (hybrid) slurries, which were cast onto flexible FTO to prepare photoelectrodes. The resulting photoelectrodes were characterized by XRD, FESEM, HRTEM and UV-VIS. The photoelectrochemical performance was investigated by linear sweep voltammetry and chronoamperometry. The photocurrent achieved by MnFe₂O₄/Polyaniline was 400 μA/cm² at 0.8 V vs. Ag/AgCl in Na₂SO₄ (pH = 2) at 100 mW/cm², while polyaniline alone achieved only 25 μA/cm² under the same conditions. The best MnFe₂O₄/Polyaniline displayed an incident photon-to-current conversion efficiency (IPCE) and applied bias photon-to-current efficiency (ABPE) of 60% at 405 nm wavelength, and 0.17% at 0.8 V vs. Ag/AgCl, respectively. High and stable photoelectrochemical performance was achieved for more than 900 s in an acidic environment.

Background: The Chestnut plant is one of the important plants for treating many diseases. Therefore, the oil extract of the Chestnut plant was taken to know its effect on activating an enzyme of lecithin: cholesterol acyltransferase that decreases in obese patients, by isolating it from the blood and using nanotechnology methods.Methods: The research included the isolation lecithin: acyltransferase cholesterol (LCAT) from the blood of 5 obese women, whose BMI was between 25-30 kg/m2, ages ranged from 40-45 years, and they were healthy without any diseases. The oil extract of Chestnut fruit was isolated. Fatty acids present in the oil extract were identified using capillary gas chromatography technique CGC, as the extract contained a percentage of unsaturated fatty acids and a lower percentage of saturated fatty acids. The enzyme was precipitated with ammonium sulfate, dialysis technique, and the gel filtration chromatography technique was used in purification. Finally, effect of the oil extract of the Chestnut fruit was studied at a concentration of (0-100) mg/ml and the nanoparticles-oil extract also on the activity of the LCAT (0-20) mg/ml. The nanoparticles of silver nitrate were prepared at a concentration of 1 mM with the oil extract of the Chestnut fruit and heated at a temperature of 60°C.Result: The highest peak was obtained from the gel filtration chromatography, which was highly effective. The number of purification times reached 91.72, and the recovery rate was 283.33%, and the effectiveness was qualitative 457.69 U/mg. Oil nanoparticles extraction was confirmed when the solution was transformed by changing its colors from colorless, yellow, orange, and finally coffee in color. The results showed an increase in the activity of the LCAT when treated with the two extracts, also the increase in the activity had a higher effect on the activity of the enzyme.Conclusion: We concluded during the study that the extract of the fruit of the oily nanoparticles was more effective in increasing the activity of an enzyme lecithin: cholesterol acyltransferase in healthy women with obesity. Keywords: Oil extract; Lecithin enzyme; Cholesterol acyltransferase; Chestnut

In this study, 165 blood samples were collected, 50 samples from a healthy person as a control and 115 samples from atherosclerosis patients. An injury was diagnosed under supervision of specialized doctors in the AL-Salam Teaching Hospital / Catheterization unit. The study included the evaluation activity of some enzymes and lipids. Results showed a significant (p≤0.05 ) increase activity of enzymes: plasma killkrein in plasma, caspas_3 (cas_3)in plasma, lipoxgenase (Lox) in serum and Aspartate aminotransferase (AST) in serum (AST), while no change has occurred in the activity of Alanine aminotransferase (ALT) in serum, but observed significant (P≤0.05) decrease in the activity of catalase (CAT) in serum.Also, it was observed a significant (P≤0.05) increase in lipid cholesterol levels serum, Triglycerides in serum. The results indicate elevated levels in low-density Lipoprotein-cholesterol (LDL_C), TG and very low-density Lipoprotein-cholesterol (VLDL_C) while it was insignificant (P≤0.05) level in high-density Lipoprotein- cholesterol (HDL_C).