Skin, gynecological and lung infections are caused by microorganisms exist in the world. The treatment of these infections is mainly based on the use of synthetic drugs that become, in recent years, ineffective, due to the resistance of bacterial strains and the proliferation of opportunistic fungi. The aim of this study is to test in vitro the antibacterial activity of aqueous extract from seeds of Citrullus colocynthis which was detected phytochemical families existing. These antimicrobial powers are measured using the micro-dilution method against the Gram-negative bacteria (Escherichia coli ATCC 25922 and Pseudomonas aeruginosa ATCC 27853) and Gram-positive (Enterococcus faecalis ATCC 29212 and Staphylococcus aureus ATCC 25923). The results showed that seeds of C. colocynthis are rich by bioactive substances. All tested extracts of C. colocynthis showed antimicrobial activity against all strains tested.. The folk medicinal use as a broad-spectrum antimicrobial agent is validated

Aims of the work is to study the antimicrobial activity of essential oils of two endemic medicinal plants of the Southwest Algerian: Bubonium graveolens Forssk (Tafs), Anvillea radiata Coss (Nogd), testing their antibacterial effect on four bacterial strains: Escherichia coli, Pseudomonas aeruginosa, Bacillus steorothermophilus and Staphylococcus aureus. At the concentrations studied, both species manifested significant antibacterial property with a zone of inhibition more than 11 mm noted for Pseudomonas aeruginosa by the effect of the essential oil of Bubonium graveolens.

The synthesis of some bicyclic D2-1,2,3-triazolines performed by 1,3-dipolar cycloaddition reaction between cyclopentenic enamines and arylazides, at room temperature in ether, led to the expected triazolines with yields which vary according to the structure of the arylazide and enamine. The structure of the obtained triazolines was determined by the usual spectroscopic methods: (IR, 1H NMR, 13C NMR).

It’s well known that plagiarism is considered mis­conduct research, unethical, perturb and damage the integrity and knowledge of the scientific community. In addition that is a form of violation of copyright law and is therefore illegal. Whereas matching an integral article (Copy and paste) from another scientific journal is a potential plagiarism qualified unjustified attitude and a stupid practice. The most striking case, is the copy and paste of our article published since 2012 in this journal (PhytoChem & BioSub Journal Vol. 6 N° 2, 83-87, 2012) by another “ scientists” - L. Ziane, H. A. Lazouni, A. Moussaoui, N. Hamidi - and published in Asian Journal of Natural & Applied Sciences, Vol. 2(1), 5-9, 2013. Thus, any one, authors or publisher not condemn and promote these practices should be automatically disqualified from scientific research.

The vibrational IR spectra of several derivatives of imidazoline and their dipole moment have been calculated using the MNDO , AM1 and PM3 methods , using Jaguar software and the results are compared with those calculated from ab initio and density functional theory (DFT) calculation. The ability of the semi empirical methods to predict the vibrational frequencies has been probed.