The isolation of the pair atropisomers of the both iminothiazoline derivatives and the spectroscopic analytical of the compound have been computed using B3LYP/6-31G(d,p) level to derive the equilibrium geometry, conformational stability, molecular orbital energies and vibrational frequencies was studied in this paper.

The main classes of secondary metabolites were investigated by phytochemical screening in different organs of Rhetinolepis Lonadioides. We tested the antibacterial activity of the essential oil extracted by steam distillation (yield 2.52%) over five bacterial and five fungal strains.

In this work we develop analytical techniques which avoid on first time the chromatographic separation. We based on the comparison of infrared spectra (IR) of pure terpenes and sesquiterpenes that constitute the major compounds in the essential oils of the Saharan medicinal plants: Bubonium graveolens, Launeae arborescens, Launaea nudicaulis, Limoniastrum feei, Wrionea saharae and Zella macroptera.

We are interested to quantify and identify by GC the essential oils extracted by steam distillation of the fresh aerial parts of two aromatic plants: Coriandrum sativum L. and Pimpinella anisum L, according to their growth cycle (before, during and after flowering).

This study examines the effect by ingestion of leaf cabbage sprayed with crude acetone extract of Euphorbia guyoniana leaves harvested in the Algerian Sahara on some biological parameters of larvae L5 and adult of desert locusts. The ingestion of cabbage leaves soaked in acetone extract of this Saharan plant generates a 100% mortality in larvae L5 and 66,67% for adult. A significant reduction in food intake was observed in the treated population compared to the control population. It results in a loss of exceptional weight ranging from 26,93% in larvae L5 to 33,09% in adults. Difficulties and anomalies are observed in moulting 16,66% of larvae L5 fed with cabbage leaves soaked in leaf extract of E. guyoniana. Dissection of adult females of the lot processing allows the observation of body regression demonstrating the depressant action of this extract on ovocyte cycle in the desert locust.