Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.22505
M. E. Moudane
Glasses of 50P 2 O 5 -xCaO-(50-x)K 2 O (x= 0, 10, 20, 30, and 40 mol %) compositions were synthesized using the melt-quench procedure. The amorphous character of the prepared material was confirmed by X-ray diffraction (XRD) and Differential Scanning Calorimetry (DSC). Fourier Transform Infra-Red (FT-IR) and Raman spectroscopy are also carried out in order to determine the structural network evolution of the glassy materials with the composition. Besides, the physical properties of the glassy phosphate system were examined such as density and molar volume. The results showed that the increase of CaO content in phosphate glasses diminish the molar volume and raise the density and transition temperature. FTIR and Raman spectroscopy analysis demonstrate the formation of P-O-Ca bonds that substitute P-O-K bonds and the depolymerization of the phosphate chains. The formation of P-O-Ca bonds is in accordance with variations of glass transition temperature, (Tg), molar volume (Vm) and density (ρ). The former bonds are the origin of the partial glass-forming ability of Ca 2+ . In addition, an analysis of the surface morphology features was conducted using a Scanning Electron Microscopy (SEM) technique.
采用熔融淬火方法合成了50 P 2 O 5-xCaO-（50-x）K2 O（x=0，10，20，30和40 mol%）组成的玻璃。通过X射线衍射（XRD）和差示扫描量热法（DSC）证实了所制备的材料的无定形特性。还进行了傅立叶变换红外光谱（FT-IR）和拉曼光谱，以确定具有该组成的玻璃材料的结构网络演变。此外，还考察了玻璃态磷酸盐体系的物理性质，如密度和摩尔体积。结果表明，随着CaO含量的增加，磷酸盐玻璃的摩尔体积减小，密度和转变温度升高。FTIR和拉曼光谱分析证明了取代P-O-K键的P-O-Ca键的形成以及磷酸盐链的解聚。P-O-Ca键的形成与玻璃化转变温度（Tg）、摩尔体积（Vm）和密度（ρ）的变化有关。前一种键是Ca2+部分玻璃形成能力的来源。此外，使用扫描电子显微镜（SEM）技术对表面形态特征进行了分析。
{"title":"Structural study, thermal and physical properties of K2O-CaO-P2O5 phosphate glasses","authors":"M. E. Moudane","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.22505","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.22505","url":null,"abstract":"Glasses of 50P 2 O 5 -xCaO-(50-x)K 2 O (x= 0, 10, 20, 30, and 40 mol %) compositions were synthesized using the melt-quench procedure. The amorphous character of the prepared material was confirmed by X-ray diffraction (XRD) and Differential Scanning Calorimetry (DSC). Fourier Transform Infra-Red (FT-IR) and Raman spectroscopy are also carried out in order to determine the structural network evolution of the glassy materials with the composition. Besides, the physical properties of the glassy phosphate system were examined such as density and molar volume. The results showed that the increase of CaO content in phosphate glasses diminish the molar volume and raise the density and transition temperature. FTIR and Raman spectroscopy analysis demonstrate the formation of P-O-Ca bonds that substitute P-O-K bonds and the depolymerization of the phosphate chains. The formation of P-O-Ca bonds is in accordance with variations of glass transition temperature, (Tg), molar volume (Vm) and density (ρ). The former bonds are the origin of the partial glass-forming ability of Ca 2+ . In addition, an analysis of the surface morphology features was conducted using a Scanning Electron Microscopy (SEM) technique.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46157418","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}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I1.21094
Y. E. Ouadi, A. Bouyanzer, S. Çetinkaya, H. Bendaif
So far, many efforts have been made to discover phytochemical alternatives to chemically synthesized antioxidants. The candidate groups of natural molecules have appeared to be polyphenols and flavonoids. In this study, the amount of phenolic and flavonoid compounds in aqueous extracts of Melissa Officinalis, from North-East Morocco (TAZA), was explored by using two common approaches (Folin Ciocalteu and Aluminum Chloride). Their antioxidant capacity was assessed by DPPH free radical scavenging assay. The results obtained demonstrated that the two fraction of ethyl acetate and diethyl ether were rich in polyphenols (505 ± 26 and 378 ± 16 μg/mg respectively) and had moderate quantities of flavonoids (8 ± 0.1 and 10 ± 0.2 μg equivalent of routine per mg of extract). At 2 µg/ml the antioxidant activities of two fractions appeared to be a lower (70 and 71%) than that of ascorbic acid (83%).
{"title":"Fractionation, dosage and rating of the antioxidant activity of the aqueous extract of Melissa Officinalis from northeastern Morocco","authors":"Y. E. Ouadi, A. Bouyanzer, S. Çetinkaya, H. Bendaif","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I1.21094","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I1.21094","url":null,"abstract":"So far, many efforts have been made to discover phytochemical alternatives to chemically synthesized antioxidants. The candidate groups of natural molecules have appeared to be polyphenols and flavonoids. In this study, the amount of phenolic and flavonoid compounds in aqueous extracts of Melissa Officinalis, from North-East Morocco (TAZA), was explored by using two common approaches (Folin Ciocalteu and Aluminum Chloride). Their antioxidant capacity was assessed by DPPH free radical scavenging assay. The results obtained demonstrated that the two fraction of ethyl acetate and diethyl ether were rich in polyphenols (505 ± 26 and 378 ± 16 μg/mg respectively) and had moderate quantities of flavonoids (8 ± 0.1 and 10 ± 0.2 μg equivalent of routine per mg of extract). At 2 µg/ml the antioxidant activities of two fractions appeared to be a lower (70 and 71%) than that of ascorbic acid (83%).","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46261283","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}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I1.17260
A. Garba
Biodiesel was produced from cattle fat, In transesterification method usingCaO and Al 2 O 3 ascatalyst. The catalyst was also characterized by XRD pattern, SEM and FTIR analysis. Response Surface Methodology using Central Composite Design (CCD) was used to determine the optimum operating conditions for the biodiesel yield. The result showed that catalyst CaO/Al 2 O 3 give maximum biodiesel yield of 99.37% with methanol to oil ratio, catalyst dosage and reaction temperature of (10.5:1), (3.5) and (50 0 C) respectively. The fuel parameters of the biodiesel produced and its blend are close to commercially available petrol diesel, indicating that the two could be blended together in order to minimize the environmental effects of the petroleum diesel. The fatty acid methyl ester (FAME) composition of the biodiesels was determined using Gas Chromatography coupled with Mass Spectrophotometer (GC-MS). The fatty acid methyl esters (FAMEs) profile indicates that the dominants compounds in biodiesel are ester compounds. The thermodynamic and kinetics of the biodiesel produced was investigated to check the feasibility, order of the biodiesel. It was found to be non-spontaneous and endergonic. The biodiesel and its blend quality were asses using and it was found out to be low in B 100 but high in B 20 indicating that the biodiesel produced from waste cattle fat have high quality and can be used for engines.
{"title":"OPTIMIZATION AND EVALUATION OF BIODIESEL QUALITY PRODUCED FROM CATTLE FAT USING CaO/Al2O3 AS CATALYST","authors":"A. Garba","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I1.17260","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I1.17260","url":null,"abstract":"Biodiesel was produced from cattle fat, In transesterification method usingCaO and Al 2 O 3 ascatalyst. The catalyst was also characterized by XRD pattern, SEM and FTIR analysis. Response Surface Methodology using Central Composite Design (CCD) was used to determine the optimum operating conditions for the biodiesel yield. The result showed that catalyst CaO/Al 2 O 3 give maximum biodiesel yield of 99.37% with methanol to oil ratio, catalyst dosage and reaction temperature of (10.5:1), (3.5) and (50 0 C) respectively. The fuel parameters of the biodiesel produced and its blend are close to commercially available petrol diesel, indicating that the two could be blended together in order to minimize the environmental effects of the petroleum diesel. The fatty acid methyl ester (FAME) composition of the biodiesels was determined using Gas Chromatography coupled with Mass Spectrophotometer (GC-MS). The fatty acid methyl esters (FAMEs) profile indicates that the dominants compounds in biodiesel are ester compounds. The thermodynamic and kinetics of the biodiesel produced was investigated to check the feasibility, order of the biodiesel. It was found to be non-spontaneous and endergonic. The biodiesel and its blend quality were asses using and it was found out to be low in B 100 but high in B 20 indicating that the biodiesel produced from waste cattle fat have high quality and can be used for engines.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46699129","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}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.21037
N. Houmy, R. Melhaoui, F. Mansouri, A. B. Moumen, M. Fauconnier, M. Sindic, H. Serghini-Caid, A. Elamrani
The most cultivated varieties of almond in eastern Morocco: (Beldi (B), a local ecotype, Marcona (M) from Spain, Ferragnes-Ferraduel (F-F) and Fournat de Breznaud (FNB) from France), were studied during three consecutive crop years in order to evaluate variations in kernel oil yield, Fatty acid (FA) profile and physicochemical properties. For this purpose, extraction of almond oils was carried out by mechanical press. The yield of varieties B, M, (F-F) and FNB ranged between 50.68%- 54.33%, 41.46%- 52.59%, 47.70%-52.39% and 51.66%-56.10%, respectively. Oleic, linoleic and palmitic acids are the major fatty acids (FA) ranging between 57.54%- 72.90%, 17.80%- 29.81% and 6.50%-8.48%, respectively. Results showed a noticeable effect (P<0.001) of variety on Total phenolic content (TPC), oxidative stability and α-, β-, γ-, δ-tocopherol isomers; however, acidity and peroxide index, were affected with a lower manner by "variety" factor. In addition, all the analyzed parameters were highly (P<0.001) affected by climatic conditions of the crop year. In addition, the highest variations for the analyzed almond oils were recorded for their contents on α-tocopherol, γ-tocopherol, oleic and linoleic acids. According to the observed results, the couple Ferragnes-Ferraduel seems to produce stable and high quality almond oil compared to the other varieties.
{"title":"Assessment of fatty acids profile, oil yield and tocopherol content of four Almond cultivars grown in Eastern Morocco","authors":"N. Houmy, R. Melhaoui, F. Mansouri, A. B. Moumen, M. Fauconnier, M. Sindic, H. Serghini-Caid, A. Elamrani","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.21037","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.21037","url":null,"abstract":"The most cultivated varieties of almond in eastern Morocco: (Beldi (B), a local ecotype, Marcona (M) from Spain, Ferragnes-Ferraduel (F-F) and Fournat de Breznaud (FNB) from France), were studied during three consecutive crop years in order to evaluate variations in kernel oil yield, Fatty acid (FA) profile and physicochemical properties. For this purpose, extraction of almond oils was carried out by mechanical press. The yield of varieties B, M, (F-F) and FNB ranged between 50.68%- 54.33%, 41.46%- 52.59%, 47.70%-52.39% and 51.66%-56.10%, respectively. Oleic, linoleic and palmitic acids are the major fatty acids (FA) ranging between 57.54%- 72.90%, 17.80%- 29.81% and 6.50%-8.48%, respectively. Results showed a noticeable effect (P<0.001) of variety on Total phenolic content (TPC), oxidative stability and α-, β-, γ-, δ-tocopherol isomers; however, acidity and peroxide index, were affected with a lower manner by \"variety\" factor. In addition, all the analyzed parameters were highly (P<0.001) affected by climatic conditions of the crop year. In addition, the highest variations for the analyzed almond oils were recorded for their contents on α-tocopherol, γ-tocopherol, oleic and linoleic acids. According to the observed results, the couple Ferragnes-Ferraduel seems to produce stable and high quality almond oil compared to the other varieties.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41699382","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}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.20868
Amine Ouaket, Boutaina Addoum, B. E. Khalfi, A. Soukri, N. Knouzi, M. Berrada
In this paper, we present experimental findings on the protective effect of some bis-benzimidazole molecules against oxidative (H 2 O 2 ) and nitrosative (SNP) stress using the protozoan T. thermophila as a cellular model. The results of this article show that the molecules 2,2’-Benzendiyl-1,4-Bis-(5-amino-1H-benzimidazole) and 2,2’-Octandiyl-1,8-Bis-(quinolin-8-ol-5-azo-1H-benzimidazole) have a protective effect against stress important than the molecule 2,2’-Benzendiyl-1,4-Bis-(1H-benzimidazole).
{"title":"Investigation of antioxidant activity of some bis-benzimidazole in Tetrahymena thermophila stressed cells","authors":"Amine Ouaket, Boutaina Addoum, B. E. Khalfi, A. Soukri, N. Knouzi, M. Berrada","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.20868","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.20868","url":null,"abstract":"In this paper, we present experimental findings on the protective effect of some bis-benzimidazole molecules against oxidative (H 2 O 2 ) and nitrosative (SNP) stress using the protozoan T. thermophila as a cellular model. The results of this article show that the molecules 2,2’-Benzendiyl-1,4-Bis-(5-amino-1H-benzimidazole) and 2,2’-Octandiyl-1,8-Bis-(quinolin-8-ol-5-azo-1H-benzimidazole) have a protective effect against stress important than the molecule 2,2’-Benzendiyl-1,4-Bis-(1H-benzimidazole).","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47046522","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}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.22470
M. Ouchabi
Hereby, we are describing the synthesis and characterization concerning acid -basic properties of catalysts containing varied amounts of NiMo (2-14 wt % of NiMoO 4 ) worn on copper orthophosphate whose its preparation was executed employing a co-precipitation method, to which we introduced the Nickel-Molydenum by impregnation with a porous volume at several stages, succeeded by calcination under air at a different temperature. The employed techniques for solids’ characterization were XRD to identify different phases, Nitrogen adsorption at-196°C. and catalytic conversion of isopropanol at different temperatures’ reaction ranging from 180 to 400 °C. The outcome revealed that the solids NiMo/CuP mainly consisted of copper phosphate Cu 3 (PO 4 ) 2 together with NiMoO 4 as minor phase. The NiMoO 4 crystallinity’s degree increases by increasing Nickel-Molydenum. It was discovered that the specific area (S BET ) of the studied system will slightly increase by the increase in NiMoO 4 content. The catalytic activity in isopropanol conversion which proceeds via dehydration yielding propene increases as a function of extent of loading.
{"title":"Effects of NiMoO4 impregnation on the catalytic activity of Cu3 (PO4)2 in the conversion of isopropanol","authors":"M. Ouchabi","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.22470","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.22470","url":null,"abstract":"Hereby, we are describing the synthesis and characterization concerning acid -basic properties of catalysts containing varied amounts of NiMo (2-14 wt % of NiMoO 4 ) worn on copper orthophosphate whose its preparation was executed employing a co-precipitation method, to which we introduced the Nickel-Molydenum by impregnation with a porous volume at several stages, succeeded by calcination under air at a different temperature. The employed techniques for solids’ characterization were XRD to identify different phases, Nitrogen adsorption at-196°C. and catalytic conversion of isopropanol at different temperatures’ reaction ranging from 180 to 400 °C. The outcome revealed that the solids NiMo/CuP mainly consisted of copper phosphate Cu 3 (PO 4 ) 2 together with NiMoO 4 as minor phase. The NiMoO 4 crystallinity’s degree increases by increasing Nickel-Molydenum. It was discovered that the specific area (S BET ) of the studied system will slightly increase by the increase in NiMoO 4 content. The catalytic activity in isopropanol conversion which proceeds via dehydration yielding propene increases as a function of extent of loading.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47257024","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}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.22051
Siham Lakrikh, Hajar Atmani, Bouchra Mekkaoui, L. Lâallam, A. Jouaiti
In this paper, we used theoretical methods density functional theory to determine the properties of the seven organic molecules based on 2-(aryl)-2-(7(4) -(arylsulfonyl) oxime-1-ethyl-1H-indazol-4-ylidene) acetonitrile. These photo-electronic parameters are very interesting in the photovoltaic field. Such as, energies of High Occupied Molecular Orbitals, Energies of Low Occupied Molecular Orbitals and energy of gap. We explored our results in the determination of electronic and photo-electronic properties of these studies molecules using Time-Dependent Density Functional Theory, indeed the object was to determine the molecules wavelengths, as far as trace the visible ultra-violet spectrum and determine the transition states in the last step. The established results and the elaborated properties shown throughout the document the importance of these molecules especially in photovoltaic fields.
{"title":"Photo-electronic Computational study of 2- (aryl) -2- (7 (4) - (arylsulfonyl) oxime-1-ethyl-1H-indazol-4-ylidene acetonitrile molecules: DFT and TD-DFT study","authors":"Siham Lakrikh, Hajar Atmani, Bouchra Mekkaoui, L. Lâallam, A. Jouaiti","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.22051","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.22051","url":null,"abstract":"In this paper, we used theoretical methods density functional theory to determine the properties of the seven organic molecules based on 2-(aryl)-2-(7(4) -(arylsulfonyl) oxime-1-ethyl-1H-indazol-4-ylidene) acetonitrile. These photo-electronic parameters are very interesting in the photovoltaic field. Such as, energies of High Occupied Molecular Orbitals, Energies of Low Occupied Molecular Orbitals and energy of gap. We explored our results in the determination of electronic and photo-electronic properties of these studies molecules using Time-Dependent Density Functional Theory, indeed the object was to determine the molecules wavelengths, as far as trace the visible ultra-violet spectrum and determine the transition states in the last step. The established results and the elaborated properties shown throughout the document the importance of these molecules especially in photovoltaic fields.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48857244","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}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I1.23215
A. Bouzidi, M. Djedid, C. Ad, M. Benalia, B.Hafez, H. Elmsellem
The present study is concerned with the removal of Cobalt (II) from aqueous solution by adsorption onto low cost adsorbent. Luffa Cylindrica as adsorbent, (LC) was investigated in batch adsorption system. LC was characterized by Scanning Electron Microscopy (SEM) and Brunauer-Emmett-Teller (BET) surface area analyzer. The sorption of Co (II) ions by LC was subjected to equilibrium, thermodynamics and kinetic studies and was carried out by considering the effects of pH, effect of masse and particles size of the biosorbent, initial metal ions concentration, contact time and temperature. BET surface area of LC was 46.396 m 2 /g. The optimum conditions for maximum adsorption were attained at pH 6 and LC mass is 1.5 g with particle size is < 0.08 mm and contact time is 60 min. The pseudo-second-order rate equation described the Kinetic data well. The process is chemisorptive and controlled by the pseudo-second-order. Adsorption parameters were determined using both Langmuir and Freundlich isotherms, but the experimental data were better fitted to the Langmuir equation than to Freundlich equation, with correlation coefficients above 0.99 which indicates the adsorption is monolayer adsorption with maximum adsorption capacity for Co(II) was 2.53 mg/g.
{"title":"Biosorption of Co (II) ions from aqueous solutions using selected local Luffa Cylindrica: Adsorption and characterization studies","authors":"A. Bouzidi, M. Djedid, C. Ad, M. Benalia, B.Hafez, H. Elmsellem","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I1.23215","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I1.23215","url":null,"abstract":"The present study is concerned with the removal of Cobalt (II) from aqueous solution by adsorption onto low cost adsorbent. Luffa Cylindrica as adsorbent, (LC) was investigated in batch adsorption system. LC was characterized by Scanning Electron Microscopy (SEM) and Brunauer-Emmett-Teller (BET) surface area analyzer. The sorption of Co (II) ions by LC was subjected to equilibrium, thermodynamics and kinetic studies and was carried out by considering the effects of pH, effect of masse and particles size of the biosorbent, initial metal ions concentration, contact time and temperature. BET surface area of LC was 46.396 m 2 /g. The optimum conditions for maximum adsorption were attained at pH 6 and LC mass is 1.5 g with particle size is < 0.08 mm and contact time is 60 min. The pseudo-second-order rate equation described the Kinetic data well. The process is chemisorptive and controlled by the pseudo-second-order. Adsorption parameters were determined using both Langmuir and Freundlich isotherms, but the experimental data were better fitted to the Langmuir equation than to Freundlich equation, with correlation coefficients above 0.99 which indicates the adsorption is monolayer adsorption with maximum adsorption capacity for Co(II) was 2.53 mg/g.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42009570","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}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I1.18239
M. M. Charithra, J. G. Manjunatha
Electro-analysis of Riboflavin (RN) consumed as vitamin has been delved by constructing the poly (Evans Blue) modified graphite paste electrode (PEBMGPE) as an electrochemical detector. Voltammetric determination of RN in 0.2 M PBS (pH 7.0) at the electro-active layer of the PEBMGPE was conducted. The PEBMGPE plays a crucial role as sensing tool towards the detection of RN compared to the BGPE. The topographical features of the bare graphite paste electrode (BGPE) and PEBMGPE was acquired by the FESEM surface analysis. All experimental factors such as applied potential, the effect of scan rate, impact of the pH were optimized. Employing the Differential pulse voltammetry (DPV) approaches using the good experimental circumstances the analytical curve was linear in the range of 6×10 -6 -1.5×10 -4 M, the detection limit and limit of quantification gained as 2.1×10 -7 M and 7.1×10-7 M, respectively. Subsequently, good repeatability, excellent reproducibility, and adequate stability, high sensitivity were achieved for the PEBMGPE sensor. In addition, the PEBMGPE sensor was applied for the interference study of RN with Dopamine (DA) and Paracetamol (PR). Besides the practicability of the projected sensor was successfully utilized for the detection of the RN in the pharmaceutical formulations
{"title":"Fabrication of Poly (Evans Blue) Modified Graphite Paste Electrode as an Electrochemical sensor for Sensitive and Instant Riboflavin Detection","authors":"M. M. Charithra, J. G. Manjunatha","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I1.18239","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I1.18239","url":null,"abstract":"Electro-analysis of Riboflavin (RN) consumed as vitamin has been delved by constructing the poly (Evans Blue) modified graphite paste electrode (PEBMGPE) as an electrochemical detector. Voltammetric determination of RN in 0.2 M PBS (pH 7.0) at the electro-active layer of the PEBMGPE was conducted. The PEBMGPE plays a crucial role as sensing tool towards the detection of RN compared to the BGPE. The topographical features of the bare graphite paste electrode (BGPE) and PEBMGPE was acquired by the FESEM surface analysis. All experimental factors such as applied potential, the effect of scan rate, impact of the pH were optimized. Employing the Differential pulse voltammetry (DPV) approaches using the good experimental circumstances the analytical curve was linear in the range of 6×10 -6 -1.5×10 -4 M, the detection limit and limit of quantification gained as 2.1×10 -7 M and 7.1×10-7 M, respectively. Subsequently, good repeatability, excellent reproducibility, and adequate stability, high sensitivity were achieved for the PEBMGPE sensor. In addition, the PEBMGPE sensor was applied for the interference study of RN with Dopamine (DA) and Paracetamol (PR). Besides the practicability of the projected sensor was successfully utilized for the detection of the RN in the pharmaceutical formulations","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49662516","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}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.19884
Samir CHTITA, N. Aoumeur, S. Belaidi, Nourddine Tchouar, M. Ouassaf, T. Lanez
This work include several advanced molecular docking tools to study the interactions of our newly synthesized 1,3,4-thiadiazole derivatives in the active site of penicillin binding protein and DNA gyrase against Staphylococcus aureus, the enzymes targeted for antimicrobial agents. Results such as MolDock scores, binding energies, residue binding distances, etc. were identified and discussed in this present research. The molecules with best docking results were selected in order to calculate drug likeness and bioavailability using Molinspiration software. All the compounds obey Lipinski’s rule and its extension and showed drug likeness. The pharmacokinetic parameters study was done using the AdmetSAR to display ADME and toxicity properties of these antimicrobial.
{"title":"Molecular docking studies for the identifications of novel antimicrobial compounds targeting of staphylococcus aureus","authors":"Samir CHTITA, N. Aoumeur, S. Belaidi, Nourddine Tchouar, M. Ouassaf, T. Lanez","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.19884","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.19884","url":null,"abstract":"This work include several advanced molecular docking tools to study the interactions of our newly synthesized 1,3,4-thiadiazole derivatives in the active site of penicillin binding protein and DNA gyrase against Staphylococcus aureus, the enzymes targeted for antimicrobial agents. Results such as MolDock scores, binding energies, residue binding distances, etc. were identified and discussed in this present research. The molecules with best docking results were selected in order to calculate drug likeness and bioavailability using Molinspiration software. All the compounds obey Lipinski’s rule and its extension and showed drug likeness. The pharmacokinetic parameters study was done using the AdmetSAR to display ADME and toxicity properties of these antimicrobial.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47223874","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}
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