30 research outputs found
The Palm oil from seed of Phoenix dactylifera (Oil of both Deglet Nour and Kentichi) as a natural antioxidants and Environment-Friendly inhibitors on the Corrosion of mild Steel in HCl 1M
The flora of Republic of Algeria comprises a lot of Palm species, including Phoenix dactylifera. In this work, we used the Palm oil from seed of Phoenix dactylifera (Oil of both Deglet Nour and Kentichi). The objective of this study is divided into two parts. Firstly, determine the antioxidant activity of Palm oil from seed of Phoenix dactylifera (Oil of both Deglet Nour and Kentichi) according to the DPPH radical scavenging assay to suggest it as a new potential source of natural antioxidants, secondly, study the effect of inhibiting Palm oil from seed of Phoenix dactylifera (Oil of both Deglet Nour and Kentichi) on corrosion of mild steel in hydrochloric acid by electrochemical methods. Furthermore, The DPPH scavenging activity of Oil of both Deglet Nour and Kentichi increased in the order, Deglet Nour Oil < Kentichi Oil < ascorbic acid. The results of the polarization curves show that the corrosion current density decreases 577.9 ÎĽA/cm2 to 58ÎĽA/cm2 and to 59.3 ÎĽA/cm2 after addition of the inhibitor (oil of Deglet Nour and Kentichi respectively). The charge transfer resistance increases 21.69 ohm.cm2 to 186.5 ohm.cm2 and to 222.8 ohm.cm2 in the electrochemical impedance spectrum after addition of oil of Deglet Nour and Kentichi respectively. The inhibition of the compound effect is attributed to the formation of a film on the surface of the steel.
Contribution to the semantic characterization of web service by non-functional properties for the selection and composition of services
This paper suggest an engineering oriented vision of services composition where the composition has its own life cycle and can be reused and adapted to operating contexts. We will present a specific model that enable the enrichment of ontology of services by non-functional properties corresponding to the quality of service, user profiles, preferences and security protocols of access to information corresponding to user profiles
Complication rare de la coloscopie chez un patient sous anticoagulant: hemopéritoine par rupture d’un hématome sous capsulaire de la rate, cas clinique
La coloscopie à visée diagnostique et/ou thérapeutique est un examen invasif fréquemment pratiquée de nos jours. La perforation colique et l'hémorragie digestive en sont les principales complications. La survenue d'un hémopéritoine par rupture d'un hématome sous-capsulaire splénique est une complication extrêmement rare et potentiellement mortelle de la coloscopie. Un traumatisme splénique minime passé inaperçu et la prised'anticoagulant en sont des facteurs favorisants. Nous présentons le cas d'une rupture d'un hématome sous-capsulaire de la rate après une coloscopie, survenue chez un patient de 70 ans porteur d'une valve mitrale mécanique sous acénocoumarol à dose hypocaogulante. La nécessité d'obtention d'une anti coagulation rapidement efficace et l'instabilité hémodynamique avaient justifiée la réalisation d'une splénectomie. L'évolution était favorable. A travers cette observation clinique nous discutons les mécanismes et les modalités de prise en charge devant cette complication
Global solutions and self-similar solutions of semilinear wave equation
International audienceWe prove existence, uniqueness and regularity results for the global solutions of the semilinear wave equations. In particular, we show existence of regular self-similar solutions. Also, we build some finite-energy asymptotically self-similar solutions
Global solutions and self-similar solutions of nonlinear wave equations
National audienceWe prove some results about existence, uniqueness and regularity properties of global solutions of the nonlinear wave equations. In particular we show existence of regular self-similar solutions. We build also a family of finite energy solutions which converge asymptotically to self-similar solutions. (C) Academie des Sciences/Elsevier, Paris
Functional Analysis-H=W Musielak spaces framework, by Youssef Ahmida, Alberto Fiorenza and Ahmed Youssfi, communicated on 13 December 2019
Wc give a sufficient structural condition on the Musielak functions for the Meyers-Scrrin theorem to hold in Musielak spaces. Wc unify and extend some density results of smooth functions in Orlicz Sobolcv spaces as well as in variable exponent Sobolev spaces
The SALTMED model calibration and validation using field data from Morocco
The objective of this study was to calibrate and validate the SALTMED model using field data of three
growing seasons of quinoa (Chenopodium quinoa Willd.), chickpeas (Cicer arietinum) and sweet corn (Zea
mays Saccharata) which were grown in the south of Morocco and subjected to six treatments of deficit
irrigation with treated wastewater.
The calibration focussed primarily on soil moisture related to quinoa in the field, measured yield and dry
matter. The validation process of biomass production was based on use of the calibrated photosynthesis
efficiency value of the control treatment. Plant parameters such as plant height and rooting depth, duration of
each growth stage, sowing date, harvesting date, harvest index and leaf area index were based on field
measurements and records. Crop coefficients Kc, Kcb, Fc were based on FAO56 paper. Soil parameters such
as water retention curves were based on laboratory measurements. Initial soil water content and salinity were
based on measurements either in the laboratory or in the field. Fine tuning of some crop and soil parameters
was carried out in order to obtain a good calibration.
Following successful calibration and validation, the SALTMED model proved its ability to predict soil
moisture, yield and total dry matter for three growing seasons under several deficit irrigation strategies using
treated wastewater. The model showed a very good agreement between the observed and simulated data, as
well as being able to reveal the same difference between deficit irrigation strategies in terms of measured yield
and total dry matter