Abstract In this study, the polypyrrole/ZnO/ZnCr2O4composite as an efficient adsorbent was synthesized by two steps. At first, zinc oxide/zinc chromite (ZnO/ZnCr2O4) composite was synthesized using simple and facile co-precipitation method. Then, ZnO/ZnCr2O4composite was modified by polypyrrole (PPy). The adsorbent was characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscopy (SEM) and energy […]
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Estimation of the gas phase formation enthalpies for superheavy-elements (112, 113, 114, 117, 118, 119 and 120) and some of their +1 and -1 ions
Abstract In the present work, the gaseous phase formation enthalpies for the elements (and their +1 cations) from groups 1,2, 12, 13, 16, 17 and 18 of the periodic table taken from literature [2,3], the electron integrated heat capacity [4], as well as previously calculated IE and EA [5] are employed to estimate the gas […]
A Density Functional Theory analysis of the relationships between the Badger index measuring carcinogenicity and the electronic structure of a series of substituted Benz[a]anthracene derivatives, with a suggestion for a modified carcinogenicity index
Abstract We carried out a quantum-chemical analysis of the relationships between the electronic structure of several substituted benz[a]anthracene derivatives and Badger’s qualitative scale for grading skin and subcutaneous tissue carcinogenic activity. We obtained statistically significant results for the Badger index used for carcinogenicity in the skin but not for the subcutaneous tissue. A new carbon […]
Influence of salt stress on lipids metabolism, Photorespiration, Photosynthesis and Chlorophyll Fluorescence in crop plants
Abstract Salt stress presents an increasing threat to plant agriculture. Among the various sources of soil salinity, irrigation combined with poor drainage is the most serious, because it represents losses of once productive agricultural land. Environmental stress due to disordering in cohesions of membrane lipids and proteins. Lipids are among the most prominent constituents of […]
Antioxidant and Insecticidal Effect of Some Plant Extracts against Callosbruchus maculates (coleoptera: Bruchidae)
Abstract The aim of the study was to test the effect of methanolic guava leaf and pomegranate peel extracts as antioxidant and insecticide. In the Gas Chromatography and Mass spectroscopy analysis, 30 bioactive phytochemical compounds were identified in the methanolic extract of guava leaf and 23 bioactive phytochemical compounds were identified, in the methanolic extract […]
Evaluation of the Physico-Chemical Quality of the Waters of the Oulja Well in the Oum Er-Rbia Watershed
Abstract The Spatio-temporal variations of certain physicochemical parameters were studied, in fact the sampling was carried out during the year 2014. Two samples were taken per well, and per season. The analysis results obtained show that high mineralization of the well water as indicated by the high values of the electrical conductivity and the major […]
Reactions and Mechanism of Tartrazine and Molybdate Ion in Hydrochloric Acid
Abstract The reaction and mechanism of tartrazine and molybdate ion in hydrochloric acid has been investigated at a temperature of T = 30±1 oC, [H+] = 1 x 10-4 mol dm-3 and ionic strength, µ= 1.0 mol dm-3. The reaction is first order with respect to both tartrazine and molybdate ion. The rate of […]
Investigation of Adsorptive Properties of Modified Sepiolite as an Efficient Magnetically Recoverable Clay for Removal of Azo Dye from Aqueous Solutions
Abstract In this research, the natural clay of sepiolite (Mg4Si6O15(OH)2·6H2O) were modified by magnetic metal oxide ofNi0.5Zn0.5Fe2O4 to obtain an efficient and magnetically recoverable adsorbent (Ni0.5Zn0.5Fe2O4/sepiolite). The synthesized adsorbent (Ni0.5Zn0.5Fe2O4/sepiolite) was characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), UV-Vis spectroscopy, scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX).In this study, the […]
A DFT Study of the Relationships between Electronic Structure and Central Benzodiazepine Receptor Affinity in a group of Imidazo[1,5-a]quinoline derivatives and a group of 3-Substituted 6-Phenyl-4H-imidazo[1,5-a]-[1,4]benzodiazepines and related compounds
Abstract We have analyzed the relationships between electronic structure and central benzodiazepine receptor affinity of the title compounds. The electronic structure was obtained at the B3LYP/6-31G(d,p) level after full geometry optimization. Statistically significant relationships were obtained for both groups of molecules. The corresponding partial 2D-pharmacophores were built. They could be used for the design of […]
Isoxazole Derivatives: The Search for Anticancer Drugs
Abstract Over the last seven years, there has been a continuous interest towards structural modification of isoxazole heterocycle in order to develop anticancer agents. This quest culminated in the syntheses of a large number of compounds and their evaluation against several cancer cell lines. In this paper, emphasis is made on reporting the synthesis and […]