Mediterranean Journal of Chemistry最新文献

{"title":"Identification and antioxidant activity of Ammi visnaga L. polyphenols from the Middle Atlas in Morocco","authors":"J. Karkouri, A. Drioiche, A. Soro, Atika Ailli, N. Benhlima, A. Bouzoubaa, F. E. Makhoukhi, H. Oulhaj, Ferdinand Kouoh Elombo, T. Zair","doi":"10.13171/mjc10702007221459jek","DOIUrl":"https://doi.org/10.13171/mjc10702007221459jek","url":null,"abstract":"In this work, we are interested in both the study of the phenolic compounds and the evaluation of the antioxidant properties of the extracts of Ammi visnaga L. collected from the Middle Atlas in Morocco. Phytochemical screening was carried out to highlight the qualitative composition of the secondary metabolites contained in this plant. Also, the extraction of total polyphenols was carried out by maceration using hydromethanolic and hydroacetonic mixtures. Then, the fractionation of the crude extracts was conducted by liquid-liquid extraction using successively two organic solvents with different polarities: ethyl acetate and n-butanol. The polyphenols contents were spectrophotometrically estimated using the Folin-Ciocalteau method. It showed that the ethyl acetate fraction is more abundant in phenolic compounds than the other fractions. The qualitative analysis was performed by high-pressure liquid chromatography with U.V. and electrospray ionization coupled to mass spectrometry (HPLC/UV-ESI-MS), which confirmed the richness of this species in polyphenols and particularly in flavonoids, especially by the identification of kaempferol, rhamnetin, biochanin A, ammiol. These molecules belong to flavones, flavonols, and furochromones, which are also identified both in the form of genin and of heteroside. The antioxidant activity of the different fractions was evaluated by diphenyl-picryl-hydrazyl (DPPH●). The IC50 is equal to 12.87 μg / mL for the ethyl acetate fraction, against 8.8 μg / mL for ascorbic acid and 10.8 μg / mL for BHA which are used as reference compounds.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82405473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Global reactivity Indices and Electron Localization Function calculations in the formation of boron nitride molecule","authors":"A. El Hadki, R. Tazi, H. El Hadki, N. Komiha, A. Zrineh, O. K. Kabbaj","doi":"10.13171/mjc107020071343aeh","DOIUrl":"https://doi.org/10.13171/mjc107020071343aeh","url":null,"abstract":"The present study focuses on topological analysis of electron density population, structural and thermodynamic properties involved in the reaction between Boric Acid (H 3 BO 3 ) and Ammonia (NH 3 ) in the synthesis of boron nitride (BN) used in cancer therapy medication and biomedical applications. The compound above has similar properties to carbonaceous materials. Indeed, it exists mainly in the two cubic and hexagonal forms, which are respectively identical to diamond and graphene surfaces. DFT/ M06-2X/aug-cc-pVDZ calculations were performed to determine global reactivity indices and the reaction process that operates via three transition states. ELF function has been achieved to describe the evolution of forming bonds along the IRC path.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"19 1","pages":"642-648"},"PeriodicalIF":0.0,"publicationDate":"2020-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79742419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spectrophotometric determination of Uranium through complex formation with roxarsone","authors":"Nashat Mohamed Alanwar Abd alaty","doi":"10.13171/mjc106020071479nmmaa","DOIUrl":"https://doi.org/10.13171/mjc106020071479nmmaa","url":null,"abstract":"A new sensitive, accurate, and non-extractive spectrophotometric method was developed for the rapid determination of Uranium in pure form and Uranium ore using roxarsone . The procedure was based on the complex formation between Uranium (VI) and roxarsone. This showed maximum absorption at λmax 395 nm with a linear relationship in the concentration range from (20-100 µg mLˉ¹) with a molar absorptivity 9.57×10 3 (1mol -1 cm -1 ). Inductively Coupled Plasma mass spectroscopy (ICP-MS) was used in the study of the interferences caused by some metallic ions, which were effectively masked by tartaric acid and diethylenetriaminepenta-acetic acid (DTPA). The method holds its accuracy and precision well when applied to the determination of the studied Uranium in its pure form and Uranium ore .","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"1 1","pages":"634-641"},"PeriodicalIF":0.0,"publicationDate":"2020-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83232602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Mg/Al molar ratio on the basicity of Mg-Al mixed oxide derived from Mg-Al hydrotalcite","authors":"S. Arhzaf, M. Bennani, S. Abouarnadasse, H. Ziyat, O. Qabaqous","doi":"10.13171/mjc10602007021464sa","DOIUrl":"https://doi.org/10.13171/mjc10602007021464sa","url":null,"abstract":"The fundamental character of the Mg-Al mixed oxide (Mg n (Al)O), derived from the Mg-Al hydrotalcite (Mg n Al-CO 3 -HT), where n corresponds to the Mg/Al molar ratio (n: 2, 2.5, 3, 3.5 and 4), was studied by using the adsorption of phenol as a probe acid molecule. The hydrotalcite precursors were prepared by the coprecipitation method. Their derived mixed oxides were obtained by thermal treatment at 450°C in a flow of air. The resulting solids were characterized by X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), infrared spectroscopy (FTIR), thermogravimetric and differential thermal analysis   (TG-DTA), nitrogen physisorption (BET) and phenol chemisorption. The phenol adsorption followed by UV-Visible spectrophotometry shows that the basicity increases with the Mg/Al molar ratio, such that maximum quantity of phenol adsorbed (Q ads = 0.54 mmol/g cat ) was obtained with the mixed oxide derived from the Mg-Al hydrotalcite of Mg/Al molar ratio equal to 3.5.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"89 1","pages":"625-633"},"PeriodicalIF":0.0,"publicationDate":"2020-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80224155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The theoretical description for the electrochemical determination of 4-4´-dihydroxyazobenzene, assisted by a composite of squaraine dye with cobalt (iii) oxyhydroxide in pair with cobalt (iv) oxide","authors":"V. Tkach, M. Kushnir, Oleksandra V. Ahafonova, Mariia P. Mytchenok, A. V. Bocharov, P. Kovalchuk, S. C. D. Oliveira, P. Yagodynets, Z. Kormosh, L. V. Reis, Y. L. Bredikhina, Y. Ivanushko, Yevgeniya Nazymok","doi":"10.13171/mjc10602007011465vvt","DOIUrl":"https://doi.org/10.13171/mjc10602007011465vvt","url":null,"abstract":"The theoretical description for 4-4´-dihydroxyazobenzene CoO(OH) – assisted electrochemical determination in the mushroom pulp, food, and biological liquids has been described. In this system, a squaraine dye is used as a Cobalt(III)oxyhydroxide stabilizer and electron transfer mediator. It is shown that, contrary to the large part of the systems with cobalt (III) oxyhydroxide, this system will behave more stably, providing an efficient diffusion-controlled process. On the other hand, the oscillatory and monotonic instabilities, although possible, are caused by the double electric layer influences of either chemical or electrochemical stage.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"6 1","pages":"619-624"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87379657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pulicaria odora essential oil: a potential source of eco- friendly antioxidants and allelochemicals","authors":"M. Zefzoufi, R. Fdil, H. Bouamama, A. Mouzdahir, K. Sraidi, Amina Abouzaid","doi":"10.13171/mjc10602006301405rf","DOIUrl":"https://doi.org/10.13171/mjc10602006301405rf","url":null,"abstract":"Several plants are potential sources of natural antioxidants and can also stimulate or inhibit the germination and growth of weeds due to the production of secondary metabolites. Pulicaria odora, medicinal and aromatic plant, spontane­ous and widespread in Morocco, is widely used by the local population for its medicinal properties. In this study, allelopathic effects and antioxidant activities of P. odora roots essential oil (EO), and the main components, at different concentrations were investigated. The EO was isolated by hydrodistillation using a Clevenger apparatus. GC analysis of the EO indicated the presence of 75 volatile compounds. Among them, two accounted for 89.96% of the oil. The EO was then subjected to column chromatography on silica gel. Two major constituents were isolated and identified by 1 H NMR, 13 C NMR as isobutyric acid 2-isopropyl-4-methyl-phenylester ( 1 ), and 2-isopropyl-4-methylphenol ( 2 ). Following the results obtained by DPPH, H 2 O 2, and FRAP methods, EO and its main components possess an interesting antioxidant effect.  The significantly (p<0.05) highest antioxidant properties were exhibited by the phenolic compound 2 followed by EO, whereas lowest from compound 1 . The allelopathic effect of EO and its main components at different concentrations (7.81-500 μg/mL) was also tested against two forage species. Data obtained showed that EO, compounds 1 and 2 inhibited significantly (p<0.05) seeds growth of both tested plants ( M. sativa and M. falcata ). A dose-response relationship was found in seed germination and seedling growth inhibition of the two tested plants. Overall, phenolic component 2 exhibited the highest phytotoxicity. Compound 1 and EO have moderate phytotoxic effects on the growth of the two seeds essayed. In addition, results indicated that the phytotoxic effect of the EO (or its main compounds) also depended on the tested species. Several plants are potential sources of natural antioxidants and can also stimulate or inhibit the germination and growth of weeds due to the production of secondary metabolites. Pulicaria odora, medicinal and aromatic plant, spontane­ous and widespread in Morocco, is widely used by the local population for its medicinal properties. In this study, allelopathic effects and antioxidant activities of P. odora roots essential oil (EO), and the main components, at different concentrations were investigated. The EO was isolated by hydrodistillation using a Clevenger apparatus. GC analysis of the EO indicated the presence of 75 volatile compounds. Among them, two accounted for 89.96% of the oil. The EO was then subjected to column chromatography on silica gel. Two major constituents were isolated and identified by 1 H NMR, 13 C NMR as isobutyric acid 2-isopropyl-4-methyl-phenylester ( 1 ), and 2-isopropyl-4-methylphenol ( 2 ). Following the results obtained by DPPH, H 2 O 2, and FRAP methods, EO and its main components possess an interesting antioxidant effect.  The significant","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"46 1","pages":"608-618"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83698409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The use of experimental design methodology in the formulation of a new additive for the dispersion of elemental sulfur in triple superphosphate fertilizer","authors":"Asmae El Agri, A. Hafnaoui, M. Khouloud, Mohammed Senhaji Lakehal, M. E. Asri, Abdeslem Meliani","doi":"10.13171/mjc10602006271453aea","DOIUrl":"https://doi.org/10.13171/mjc10602006271453aea","url":null,"abstract":"Yields improvement of the crop depends on many parameters witch each of them acts for a specific manner to boost the plant growth and allow the soil to be more efficient to any kind of plant.  Our research is based on the implementation of elemental sulfur into the preparation of triple superphosphate fertilizer and its dispersion into the blend. By adding a small amount of it to the mixture, sulfur particles disperse uniformly by using additives in the phosphate fertilizer. This technique is successfully reached by integrating many additives obtained from different chemical industries to spread out the sulfur particle in the fertilizer. Several experiments were done by adopting the experimental design methodology (DOE) related to a screening mixture design to select the best surfactant used. So, nine commercial products with different chemical proprieties have been evaluated as a dispersant of elemental sulfur in triple superphosphate fertilizer. First, thanks to the screening mixture design, three products have been chosen for this formulation. Second, by using the mixture design method, new dispersants of elemental sulfur in triple superphosphate fertilizer have been reached. With this method, apart from it is being possible to obtain several dispersants, it is also possible to control the distribution and the average of the particle diameter of the elemental sulfur. Moreover, statistical validation tests confirm the achievement of the sulfur particle size of approximately 1000 µm.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"47 1","pages":"595-607"},"PeriodicalIF":0.0,"publicationDate":"2020-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77772077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Antioxidant Activity of fresh Lemon (Citrus lemon L.) peel in Marrakech, Kenitra cities of Morocco and Taiz of Yemen","authors":"K. Abdu, Rahma Erahioui, Amina Moutawalli, Ahmed Zahidi, K. Khedid, Said Ibn Ahmed","doi":"10.13171/mjc10602006261379ka","DOIUrl":"https://doi.org/10.13171/mjc10602006261379ka","url":null,"abstract":"The principal objective of this study was to appraise the variation of antioxidant activity, total phenols, and total flavonoids of fresh lemon peel from regions located Marrakech and Kenitra in Morocco and a region Taiz in Yemen. The test of polyphenol was performed from extracts that were measured using the Folin-Ciocalteu technique. Also, an analysis of Flavonoid was performed of was measured by using the aluminum chloride. The Free radical scavenging activity of lemon extracts was measured by 2,2′-Diphenyl-1-picrylhydrazyl hydrate (DPPH).The DPPH radical scavenging activity of ethanolic extract of fresh lemon peel found to be highest at 200μl concentration, which was 77. 15 %; 67. 88 %; 37.74%. Through it, 50% inhibition (IC50) was obtained to be 92. 04; 153. 55 and 215.407 μg/ml in Marrakech, Kenitra, and Taiz, respectively. As well, the values radical scavenging activity of methanolic extract of the same concentration, which are 82, 77 %, 53, 33 %, and 47,5%. Through it, 50% inhibition (IC50) was obtained to be 145. 6; 179. 17 and 274.899 μg/ml in Marrakech, Kenitra, and Taiz, respectively. But regarding the values radical scavenging activity of essential oil of the same concentration, which is 63.77 %, 42.19 %, and 80.25%. Through it, 50% inhibition (IC50) was obtained to be 155.54; 271.158 and 101.31 μg/ml in Marrakech, Kenitra, and Taiz, respectively. According to the results obtained in our study, the antioxidant activity increases with increased polyphenols and IC50 deficiency in Marrakech, Kenitra, and Taiz.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"61 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84678285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling of absorption process of the water by the wood in two-dimensions","authors":"Nadia Amardo, F. Ouzidan, R. Atmani, F. Moubarak, M. E. Kouali, M. Talbi, Abdalhak El Brouzi","doi":"10.13171/mjc9602001181125na","DOIUrl":"https://doi.org/10.13171/mjc9602001181125na","url":null,"abstract":"Wood is a natural and highly anisotropic material. Therefore, mechanical characteristics of the material depend on the direction of wood . In this paper, we propose to describe the transfer of the water inside the wood in two dimensions by immersing the sample in liquid water. The potential which drives the transport of water through the wood is controlled by the diffusion transient process.  A model based on a numerical finite difference method has been found to follow the absorption process of water above the fibers saturation point of two-dimensions.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"6 1","pages":"478-484"},"PeriodicalIF":0.0,"publicationDate":"2020-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90943218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chitosan-g-poly (acrylonitrile-co-acrylic acid) for wastewater treatment application","authors":"N. Mansour, Sahar M. Ahmed, A. M. Mazrouaa","doi":"10.13171/mjc9602001061110am","DOIUrl":"https://doi.org/10.13171/mjc9602001061110am","url":null,"abstract":"Chitosan is a biodegradable natural based polymer obtained from chitin (N-deacetylated derivative), the second most abundant polysaccharide after cellulose and soluble in most organic acids. Graft copolymerization of poly (acrylonitrile-co-acrylic acid) onto chitosan has been successfully carried out using potassium persulfate as an initiator in an aqueous medium. The PAN and PAA homopolymer formed during the reaction were removed from the Chitosan grafted copolymer by Soxhlet extraction using ethanol as the solvent.  The prepared graft copolymerization was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) to confirm the formation of the copolymer. The prepared chitosan-g-copolymer at ratio 25:75% of AN-co-AA was treated with metal solutions containing cadmium ions, times and pH at room temperature. It [Am1] was found that the optimum condition was pH=5, Time 120min and dose of adsorbent 3 mg /L.  The results revealed that the chitosan-g-copolymer prepared was excellent in removing the heavy metals than the copolymer alone. Hence, chitosan-g- poly- AN-co-AA could open the way for wastewater treatment. The thermal stability and the electrical conductivity for all prepared samples before and after grafing were measured. By studying the thermal stability at the different ratio of AN and AA in samples co 1 , co 2 , co 3 , it was found that the most thermal stability sample ratio is co 3 due to increasing the ratio of AN.  While in sample co 1 with a high ratio of AA, the thermal stability decrease according to the fast decomposition of –COOH of acrylic acid. The conductivity was 3.85x10 -7 which is more than the copolymer without chitosan, which increases the electron density of the copolymer through the end group effect. As the result of σ has a range 10 -8 S/cm -1 10 -6 S/cm -1 so, all the prepared sample can be used as an electrostatic dissipation application.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"1 1","pages":"447-455"},"PeriodicalIF":0.0,"publicationDate":"2020-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85586692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}