Modelling the Water Sorption Isotherms of Warionia Saharae and determination of sorption heats and drying kinetics

[EN] The hygroscopic equilibrium of Warionia saharae was studied, which allowed getting an idea of ​​the equilibrium water content relative to a given humidity. The results of this study made it possible to have the sorption curves. The results of this study made it possible to obtain the sorption curves necessary for know the storage conditions of the plant and the study of its drying kinetics. The static gravimetric method was used to determine sorption isotherms of Warionia saharae leaves at 30and 40 ◦C and in the range of water activity varying from 0.063 to 0.898. The Gab, Peleg models was found to be the most suitable for describing the sorption curves. The isosteric heat calculated by applying the Clausius–Clapeyron equation .The desorption isosteric heat was higher than the isosteric heat of adsorption and both decreased continuously with increasing of the equilibrium moisture content. The experimental results obtained allowed us to determine the temporal evolution of the drying kinetics as a function of the moisture content. The curve of the evolution of the water content as a function of time shows the absence of the phases product temperature and constant drying rateFedol, A.; Cheriti, A. (2018). Modelling the Water Sorption Isotherms of Warionia Saharae and determination of sorption heats and drying kinetics. En IDS 2018. 21st International Drying Symposium Proceedings. Editorial Universitat Politècnica de València. 435-442. https://doi.org/10.4995/IDS2018.2018.7669OCS43544

3-Oxo-18α-olean-28,13β-olide

The title terpene, C30H46O3, is a 28,13β-lactone of oleanolic acid prepared with bis­muth trifluoro­methane­sulfonate (OTf), Bi(OTf)3·xH2O. All rings are trans-fused. The X-ray study shows the inversion of the orientation of 18-H in the lactonization reaction. A quantum chemical ab-initio Roothaan Hartree–Fock calculation of the equilibrium geometry of the isolated mol­ecule gives values for bond lengths and valency angles in close agreement with experimental values. The calculation also reproduces the observed mol­ecular conformation, with puckering parameters that agree well with those determined from the crystallographic study

A stupid plagiarism in the article « Ethnopharmacology and phytochemical screening of bioactive extracts of Limoniastrum feei ( plombagenaceae) » Asian Journal of Natural & Applied Sciences, Vol. 2(1), 5-9, 2013.

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

EDSBioTer: An Electronic Data on Spectroscopic and Biological activity of Terpenoids

Terpenoids Database is a structured database holding information on Terpenoids chemical substances (895 compounds). It includes numerical data on physical, spectroscopic and biological properties of terpenoids compounds; as well as systematic and common names of this compounds in addition to literature references

The Saharan medicinal plant Limoniastrum feei: Ethnomedical survey and preliminary phytochemical screening of antibacterial extracts

Limoniastrum feei (plumbagenaceae) a medicinal plant, used in Saharan ethnopharmacopeae to treat gastric tract, hepatit desorder and cought. The antibacterial extracts from leaves, stem and twig of this plant are screened for the principal classes of secondary metabolites, such as Alkaloids, Saponins, Terpenes, Tannins, Flavonoids, Steroids and Cardenolids

Ethnopharmacological survey and phytochemical screening of some medicinal Asteraceae from Algerian Sahara

A first report of Asteracea species census of the Algerian folk medicine, currently used in Sahara for the treatment of illenes is presented. 11 Asteraceae species namely: Anvillea radiata coss, Artemisia herba-alba, Brocchia cinerea, Bubonium graveolens, Cotula anthemoides, Echinops spinosus, Launaea arborescens, Launaea nudicaulis, Launaea resedifolia, Scorzonera undulata and Warionia saharae were selected based on the survey through interviews with local inhabitant, herbalist in the Souk and old women according to our previous works. Ethnopharmacolgical potential and chemical constituents of this species are described