The effect of acceptor energy level on electron transfer rate in blends of the polymer solar‐cell material poly[[4,8‐bis[(2‐ethylhexyl)oxy]benzo[1,2‐b:4,5‐b′]dithiophene‐2,6‐diyl][3‐fluoro‐2‐[(2‐ethylhexyl)carbonyl]thieno[3,4‐b]thiophenediyl]] (PTB7) is studied using time‐resolved fluorescence. Fast electron transfer in less than 2 ps is observed for a driving force between 0.2 and 0.6 eV and the electron transfer is slower outside this range. This dependence is described by Marcus theory with a reorganization energy of ≈0.4 eV.

In this study, a platinum(II) complex ([Pt(H₂L)(PPh₃)] complex) containing a thiocarbohydrazone as the ligand was tested as an anti-proliferative agent against ovarian adenocarcinoma (Caov-3) and human colorectal adenocarcinoma (HT-29) through MTT assays. Apoptotic markers were tested by the AO/PI double staining assay and DNA fragmentation test. Flow cytometry was conducted to measure cell cycle distribution, while the p53 and caspase-8 pathways were tested via immunofluorescence assay. Results demonstrated that the cytotoxic effect of the Pt(II)-thiocarbohydrazone complexes against Caov-3 and HT-29 cells was highly significant, and this effect triggered the activation of the p53 and caspase-8 pathways. Besides, apoptosis stimulated by the Pt(II)-thiocarbohydrazone complex was associated with cell cycle arrest at the G0/G1 phase. These findings suggest that the target complex inhibited the proliferation of Caov-3 and HT-29 cells, resulting in the arrest of the cell cycle and induction of apoptosis via the stimulation of the p53 and caspase-8 pathways. The present data suggests that the Pt(II)-thiocarbohydrazone complex could also be a promising chemotherapeutic agent for other types of cancer cells.

Limestone is originally generated from sedimentary rocks that are mainly made from CaCO₃, the latter in turn is made from calcites and aragonites. This chemical composition of limestone makes it a suitable material for water/wasters treatment as these elements are identified for their capability to adsorb several pollutants. Although, limestone is environmentally sustainable material and is broadly applied in water filtration, it is has a moderate affinity for heavy metals. Thus, due to this serious drawback, limestone becomes less attracting for researchers. Therefore, this study is aiming at producing an environmentally sustainable filtration system by mixing limestone and activated carbon, and applies it to remove heavy metal (iron) from synthetic wastewaters. The ability of the new filtration media, which was made of 50% activated carbon and 50% limestone (1:1 ratio), to remove iron from 10 mg/L synthetic iron solution. The latter was created using ferrous sulphate heptahydrate and deionised water. The removal of iron was optimised for the influence of the absorbent dosage (AD) (500-1000 g), detention time (DT) (10-120 minutes) and pH of solution (4-10). The outcomes of the experiments evidenced the capacity of the new filter to efficiently remediate wastewater from iron. Where, 1000 g of this filter needed only 95 minutes, at pH of 6.0, to completely remove iron ions from the synthetic solution.

In this work, two new drug substituted monomers and new homogenous and heterogeneous polymers were synthesized loaded with medicinal properties to extend the controlled drug. The first step includes preparation of compound (F1) via reaction of maleic anhydride with 4-aminobenzoic acid. Then compound (F1) was converted to its corresponding acyl chloride derivative which reacted with amino drugs (sulfadiazine, chlordiazepoxide) afforded (F2 and F3) monomers. Homogeneous polymers (F8 and F9) prepared through polymerization reaction of free radicals of the monomers (F2 and F3) under nitrogen using methyl ethyl ketone peroxide (MEKP) as initiator. Heterogeneous polymers (F14 and F15) prepared through polymerization reaction of free radicals of the monomers (F2 and F3) separately with acrylic acid under nitrogen using methyl ethyl ketone peroxide (MEKP) as initiator. All these prepared monomers and polymers were characterized by FT-IR and 1H NMR, 13C NMR spectroscopies. Controlled drug release and swelling % was studied in different pH values at 37 ºC. Intrinsic viscosities were measured at 25 ºC with Ostwald viscometer and applied the characteristic of solubility for these polymers.

Organic matter (OM) is commonly occur in freshwaters, and it poses a threat for health and environment. For instance, high OM concentrations increase the sludge volume and cost of the treatment process in turn. Remediation of water or wastewater from OM has thus become an important issue for the treatment industry. Electrocoagulation (EC) is one of the preferred techniques of treatment for remediation of water from OM and other polluting chemicals, as it utilises simple and easy to run machines and tools, it requires less working area in comparison with conventional methods, and it is more rapidly pollutant separation than other methods. EC technique could be described by passing an electric current through sacrificial electrodes to produce metal hydroxides that separate dissolved contaminants from aqueous phase. On the other hand, the EC method has a limited efficiency in the treatment of high OM concentrations. The present study is thus intended to develop a new technique that combines an EC reactor with an ultrasound (US) field to remediate water from OM. The EC reactor, in this study, was made from four aluminium plats (500 cm² in gross area) and plastic container (1 L in volume). The operation of this combined method was optimised for the effects of key factors, such as the pH of solution, electrodes gapping, and current density. The obtained results proved that the US-EC technique removed 97.50 % of OM after 5.0 minutes of US irradiation, 20 minutes of electrolysing at current density 4.0 mA. cm⁻², initial pH 7 and gap between electrodes 5.0 mm.

The synthesis of new substituted cobalt Phthalocyanine (CoPc) was carried out using starting materials Naphthalene-1,4,5, tetracarbonic acid dianhydride (NDI) employing dry process method. Metal oxides (MO) alloy of (60%Ni3O4 40%-Co3O4 ) have been functionalized with multiwall carbon nanotubes (F-MWCNTs) to produce (F-MWCNTs/MO) nanocomposite (E2) and mixed with CoPc to yield (F-MWCNT/CoPc/MO) (E3). These composites were investigated using different analytical and spectrophotometric methods such as 1H-NMR (0-18 ppm), FTIR spectroscopy in the range of (400-4000cm-1), powder X-rays diffraction (PXRD, 2θ o = 10-80), Raman spectroscopy (0-4000 cm-1), and UV-Visible spectrophotometry (0-800 nm). Then the activity of these materials was investigated as a gas sensing of (Ammonia, Methanol and Acetone). For each case, 0.2 mg/.mL of the prepared Copc, Copc/MWCNT, Copc/MWCNTs–MO was dispersed in 1m of ammonia, methanol and acetone at 298K. The surface morphology of the prepared materials was heterogeneous.