Cancerous tumors are considered a serious and fatal diseases for both sexes and for all ages, even fetuses before their birth. Therefore, it has become necessary to find an alternative treatment for radiation to be safer and less dangerous than chemical treatments. Therefore, derivatives of one of the amino acids, such as tyrosine, were prepared. Tyrosine or tyrosine is one of the well-known and important amino acids for humans, and it is present in most proteins; The human body uses it to produce several types of hormones such as noradrenaline and adrenaline. In this paper, we prepared new derivatives of tyrosine represented by (four, five, six)-membered ring, then all these new tyrosine derivatives investigated by several techniques (FT.IR, H.NMR)–spectrophotometric, other physical and chemical properties, with assaying for some new created derivatives as anti-cancer.
This study presents a comprehensive look into the potential therapeutic, antibacterial, and anticancer properties of a nanocomposite (NC) of gold (Au) and zinc oxide (ZnO). In this study, we analyzed the adherence between Au nanoparticles (NPs) and ZnO NPs. X-ray diffraction analysis showed high crystallinity and small crystallite sizes of Au NPs and ZnO NPs, while transmission electron microscopy showed spherical NPs. Furthermore, histogram analysis showed that the average particle size of Au NPs is 27 nm, while that of ZnO NPs is 35 nm. The adherence of ZnO NPs on the surface of Au NPs increased their combined particle size to 51 nm and revealed a high-population core-shell structure. The activity of Au/ZnO NCs against Escherichia coli was more potent when compared to that of elemental Au and ZnO NPs alone. The cytotoxic effects of Au NPs, ZnO NPs, and Au/ZnO NCs against human breast cancer cells (AMG13) and human esophageal adenocarcinoma cancer cells (SK-GT4) were investigated in this study. We found that AMG13 is more sensitive than SK-GT4 to the activity of Au/ZnO NCs. The cytotoxicity of Au/ZnO NCs against AMG13 was 89%, while that against SK-GT4 was 85%. Less cytotoxic effects were recorded against normal cells (MCF7) when compared with those of cancer cells. Based on these findings, the synthesized Au/ZnO NCs could be used as a promising strategy for biomedical applications.
In this work, seven additives were used to reduced the flammability, namely:(1- (4-hydroxy-3-methoxyphenyl)-3-(2-hydroxy-5-(6-nitrobenzothiazoldiazenyl)phenyl)pr op-2-en-1-one)(Add. I),(3-(2-hydroxy-5-(6-nitrobenzothiazoldiazenyl)phenyl)-1-(4-hydroxyphenyl)prop-2-en-1-one)(Add. II),3-(2-hydroxy-5-(6-nitrobenzohiazoldiaze nyl) phenyl)-1-(4-methoxyphenyl)prop-2-en-1-one(Add. III), 2-((2-hydroxy-4-methyl phenyl)imino)methyl)-4-(6-nitrobenzothiazoldiazenyl)phenol(Add. IV),2-(6-methyl pyridin-2-yl)imino)methyl)-4-(6-nitrobenzothiazoldiazenyl)phenol(Add. V) and 2-(4-chlo rophenyl)imino)methyl)-4-(6-nitrobenzothiazol-2-yl)diazenyl)phenol (Add. VI).
The effects of these additives on flammability of some types of the thermosetting polymers (unsaturated polyester and epoxy resins), have been studied. Sheets of the specimens (resins with different weight percentages of additives), in dimensions (150×150×3) mm were prepared. Two standard test methods used to measure the flame retardation which are: (ASTM: D-2863) and (ASTM: D-635).
Results are obtained from these tests indicated that, additive (Add. VI) has high efficiency as flame retardant, self–extinguishing (S.E.) at the percentage (0.1 %) for unsaturated polyester and the epoxy resins. Also self extinguishing (S.E.) at the percentage (0.1%) for additives (Add. I), (Add. IV) and (Add. V), in unsaturated polyester resin and non-burning occurs in (0.15%) with Additive (Add.VI) and (Add. V) in unsaturated polyester resin but it is occur in (0.2%) with additives (Add. VI) and (Add. V) in epoxy resin.
A wide range of methods is currently used to remove various pollutants from wastewater. The current focus of research and industries is the use of electrocoagulation for wastewater treatment as this technique can be run using solar energy which produces in-site coagulant able remove dissolved and suspended pollutants at a short time and low cost. Dyes are currently categorised as a universal surface water pollution problem since many industries produce dyes polluted wastewater such as the textile industry. The current investigation focus on the use of electrocoagulation to treat acid orange 2 dye polluted synthetic wastewater and study the impact of the experimental parameters. An electrocoagulation reactor was developed using Iron electrodes and the energy was provided to the reactor using a solar panel. It was found that 100% of the pollutant was removed using electrocoagulation reactor runs on solar power. The Neutral pH level is favourable to remove the dye from textile wastewater. Higher current density and smaller distance between electrodes provide higher removal efficiency of the dye. Generally, it could be said that the best removal of the dye was achieved at pH level at 7, the current density at 2 mA/cm2, the spacing at 5 mm, and the treatment time at 40 minutes.
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