Etablissement Autonome de Controle et de Coordination des Exportations

Agadir, Morocco

Etablissement Autonome de Controle et de Coordination des Exportations

Agadir, Morocco
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Gharby S.,Mohammed V University | Harhar H.,Mohammed V University | Bouzoubaa Z.,Inra Crra Agadir Unite Of Recherche Ressources Naturelles Et Produits Of Terroir | Roudani A.,Etablissement Autonome de Controle et de coordination des exportations | And 2 more authors.
Journal of Materials and Environmental Science | Year: 2014

In this study, polyphenols were extracted from margins in order to promote them as natural antioxidants and comparing it with a synthetic antioxidant Tert-butylhydroquinone (TBHQ). A concentration of 100 ppm of polyphenols or TBHQ was added to sunflower oil. To quickly assess the effect of polyphenols on the stability of the oil, we conducted an accelerated oxidation by Rancimat at 110°C under an air flow of 20 l / h. Then the oil was placed under storage conditions in an oven (accelerated test at 60°C) for 35 days. The evolution of the oxidation state was measured by the peroxide (IP), acidity and specific extinction at 270 nm. The results showed that the oils containing antioxidants have undergone oxidative damage less pronounced than that of the reference (no additives).

Afia L.,University Ibn Zohr | Salghi R.,University Ibn Zohr | Bammou L.,University Ibn Zohr | Bazzi E.,Etablissement Autonome de ContrOle et de Coordination des Exportations | And 3 more authors.
Journal of Saudi Chemical Society | Year: 2014

Corrosion inhibition effect of Argan oil (AO) on corrosion of C38 steel in 1M HCl solution was investigated using weight loss measurements, electrochemical polarization and EIS methods. Results obtained reveal that Argan oil acts as a mixed inhibitor without modifying the hydrogen reduction mechanism. The inhibition efficiency increases with increased Argan oil concentration to attain a maximum value of 81% at 3g/L. The inhibition efficiency of Argan oil decreases with the rise of temperature. Argan oil is adsorbed on the steel surface according to Langmuir isotherm model. The parameters (Ea*, δHa*, δG* and δSa*) were estimated and discussed. The fundamental thermodynamic functions were used to glean important information about Argan oil's inhibitory behavior. © 2014.

Ben Hmamou D.,University Ibn Zohr | Salghi R.,University Ibn Zohr | Zarrouk A.,University Mohammed Premier | Messali M.,Taibah University | And 5 more authors.
Der Pharma Chemica | Year: 2012

Chamomile extract (CE) was tested as corrosion inhibitor for C38 steel in 1 M HCl using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM) studies. The effect of temperature on the corrosion behavior of C38 steel in 1 M HCl with addition of plant extracts was studied in the temperature range of 298-328 K. Inhibition efficiency of 88% was achieved with 7g/L CE at 298 K. It is evident from the results of this study that CE inhibits the corrosion in 1 M HCl through adsorption process following Langmuir adsorption isotherm. The protection efficiency increased with increase in inhibitor concentration but decreases with temperatures. The Nyquist plots showed that on increasing CE concentration, increases charge transfer resistance and decreases double layer capacitance. The mixed mode of action exhibited by the inhibitor was confirmed by the polarization studies while SEM analysis substantiated the formation of protective layer over the C38steel surface. The values of inhibition efficiency obtained from different techniques measurements are in good agreement.

Zine S.,University Ibn Zohr | Gharby S.,Etablissement Autonome de Controle et de Coordination des Exportations | El Hadek M.,University Ibn Zohr
Biosciences Biotechnology Research Asia | Year: 2013

Oil yield, physicochemical, tricylglecrols, fatty acid composition, sterols, tocopherols and stability oxidative of Opuntia ficus-indica seed oil obtained by cold pressing extraction were determined. Oil yield was between 6-7%. Nine triacylglycerols were identified, the major being LLL (24.94%), LLO (21.31%), LLP (15.90%), and OOL (13.76%). The main fatty acids ranked in the following order of abundance: C18:2 (60.8%), C18:1 (21.3%),C16:0 (11.9%), C18:0 3.4%). The quality and composition of some minor constituents of seed oil were determined. Total tocopherol content in seed oil was 94.6 mg/100 g, γ-tocopherol (90%) was the main constituent, the sterol composition is similar to that of other vegetable oils, level of sterols making up 90.33 mg/100g seed oil was present. The sterol marker, ß-sitosterol, accounted for 75.3% of the total sterol content in the seed oil. This oil presented a moderate content in phospholipids.

Melliti W.,Tunis el Manar University | Melliti W.,University Ibn Zohr | Melliti W.,University of Carthage | Errami M.,University Ibn Zohr | And 8 more authors.
International Journal of Electrochemical Science | Year: 2013

Laboratory experiments were carried out on the kinetic of the electrochemical degradation of aqueous solutions containing Oxamyl Nematicide of carbamate pesticide. This pesticide is a broad-spectrum insecticide/nematicide for the control of key pests in field, fruit and vegetable crops. The electrochemical oxidation of oxamyl (Methyl N'N'-dimethyl-N-[(methylcarbamoyl) oxy]-1-thiooxamimidate)), was studied by galvanostatic electrolysis using boron-doped diamond (BDD) as anode. The influence of several operating parameters, such as applied current density, initial oxamyl concentration, temperature, and initial pH value, was investigated. The chemical oxygen demand (COD) measurement during the processing permitted the evaluation of the kinetic of organic matter decay and the instantaneous current efficiency. The experimental results showed that the electrochemical process was suitable for almost completely removing COD, due to the production of hydroxyl radicals on the diamond surface. In particular, the COD removal follows a pseudo first-order kinetics and the apparent rate constant increased with temperature, and by applied current while it is almost unaffected by pH. © 2013 by ESG.

Afia L.,University Ibn Zohr | Salghi R.,University Ibn Zohr | Zarrouk A.,University Mohammed Premier | Zarrok H.,Université Ibn Tofail | And 3 more authors.
Transactions of the Indian Institute of Metals | Year: 2013

Argania spinosa press cake, kernels and hulls extracts are excellent corrosion inhibitors for steel. In this work electrochemical methods are used to study the inhibition of corrosion on steel in 1 M HCl. It has shown that Argan press cake, kernels and hulls extracts suppress both the anodic and cathodic process and they behave as mixed-type inhibitors. The inhibition efficiency was found to increase with inhibitors content. Data obtained from EIS measurements, were analyzed to model the corrosion inhibition process through appropriate equivalent circuit model; a constant phase element has been used. The values of the inhibition efficiency calculated from these techniques are in reasonably good agreement. The adsorption isotherm of natural compounds on the steel surface was found to obey Langmuir's adsorption isotherm. © 2012 Indian Institute of Metals.

El Bouchtaoui M.C.,Societe Agripharma | El Bazzi,Etablissement Autonome de Controle et de Coordination des Exportations | Salghi R.,Equipe Genie de lEnvironnement et de Biotechnologie | Chebli B.,Equipe Genie de lEnvironnement et de Biotechnologie | And 3 more authors.
Physical and Chemical News | Year: 2011

In this work, we studied the efficacy of the products Philabuster 400SC, Decco OPP 20 and Deccotanil against post-harvest fungi of the citrus fruits (Citrus sinensis (L.) Osbeck cv. Washington Sanguine). The residues of these substances were also analyzed on treated fruits. The results are very encouraging since we found that the Philabuster 400SC showed the greatest inhibition (100%) of the postharvest fungi rot after 25 days and 60 days of storage at room and at cooling temperatures respectively. The other two products Decco OPP 20 and Deccotanil are also very effective. The percentages of decayed fruits are very low and appear after more than 15 days of storage at room temperature and 30 days in cold storage. The values of pesticides residues of imazalil, pyrimethanil and myclobutanyl on W. sanguine fruits remain below the maximum residue limits of pesticides permitted in citrus by the European Union. The imazalil and pyrimethanil are two molecules with different modes of action which considerably limits the risk of resistance of some fungi.

Hormatallah A.,Institute Agronomique et Veterinaire Hassan II | Bazzi L.,Etablissement Autonome de Controle et de Coordination des Exportations | Salghi R.,British Petroleum | Zarrouk A.,University Mohammed Premier | And 2 more authors.
Physical and Chemical News | Year: 2012

Disposal of leftover pesticide mixtures from sprayer operation, spillages, tank filling or cleaning equipment have been identified as the major risks of contamination of soil and water in agricultural system. Phytobac is a biological technology that widely used to minimize point source contamination by pesticides in agricultural system. The composition of the biobed filtering substrate has been identified as a key factor controlling their epuration efficiency. The biofilter substrate is elaborated from a homogenized mixture of local soil; crop residues of peach, nectarine, apple, and asparagus and chopped straw of asparagus in different proportions able to degrade active substances belong to different class of pesticides. An important degradation of pesticides is obtained after recycling through the biofilters filled by 28% of crop residues, 71% of soil and 1% of straw asparagus. Then a biobed, at orchard farm MAAMORA PRIM located on Kenitra area in Morocco, is performed.

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