Pub Date : 2021-08-06DOI: 10.48317/IMIST.PRSM/morjchem-v9i2.27594
A. Ourhedja, Y. Miyah, M. Bargach, F. Zerrouq, R. Tadili
This work was carried out to respond to a major environmental issue which is water pollution and its repercussions on receiving environments, in particular the problem of leachate in the city of Fez-Morocco. The leachates generated by many economically relevant industrial activities contain recalcitrant organic compounds that remain unchanged at the biological stage of the treatment plant, which could make it difficult to comply with the discharge standard limits currently in force. During this work, we evaluated the elements present in the leachate as well as a physicochemical characterization study such as the chemical oxygen demand (COD), the biochemical oxygen demand over 5 days (BOD5), the pH, the electrical conductivity, the total phosphorus, the ammonium, suspended matter, and heavy metals, before and during the period of coronavirus containment.
{"title":"Assessment and characterization of the physicochemical parameters of Moroccan leachate during the confinement period (coronavirus)","authors":"A. Ourhedja, Y. Miyah, M. Bargach, F. Zerrouq, R. Tadili","doi":"10.48317/IMIST.PRSM/morjchem-v9i2.27594","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/morjchem-v9i2.27594","url":null,"abstract":"This work was carried out to respond to a major environmental issue which is water pollution and its repercussions on receiving environments, in particular the problem of leachate in the city of Fez-Morocco. The leachates generated by many economically relevant industrial activities contain recalcitrant organic compounds that remain unchanged at the biological stage of the treatment plant, which could make it difficult to comply with the discharge standard limits currently in force. During this work, we evaluated the elements present in the leachate as well as a physicochemical characterization study such as the chemical oxygen demand (COD), the biochemical oxygen demand over 5 days (BOD5), the pH, the electrical conductivity, the total phosphorus, the ammonium, suspended matter, and heavy metals, before and during the period of coronavirus containment.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":"9 1","pages":"369-378"},"PeriodicalIF":1.1,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44026140","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 : 2021-08-06DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27585
A. Sujana, R. Sukardi, M. Rosbiono, W. Sopandi
The purpose of this research is to improve the fundamental concept and chemical representation of sea pollutant migration through the implementation of the RADEC learning model. Pollutants are solved, ionized, even hydrolyzed in the sea. The research employed a quasi-experimental design with a one-group pre-test and post-test design. The used instrument was four-tier diagnostic tests. It was used to see the improvement of students' fundamental concept and chemical representation on the sea pollutant migration concept. At the end of the class, most of the students' level was lack of knowledge 1 even scientific conception. The statistical data showed there was a significant mean difference between the students' pre-test and post-test, It clearly stated RADEC learning model gave an impact on students’ level of fundamental concepts and chemical representation. The improvement caused by the worksheet. It inspired students to create waste filters or chemical products that can absorb waste in the ocean even created sub-microscopic representations.
{"title":"Fundamental concepts and chemical representations on sea pollutant migration: can it be improved through RADEC","authors":"A. Sujana, R. Sukardi, M. Rosbiono, W. Sopandi","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.27585","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.27585","url":null,"abstract":"The purpose of this research is to improve the fundamental concept and chemical representation of sea pollutant migration through the implementation of the RADEC learning model. Pollutants are solved, ionized, even hydrolyzed in the sea. The research employed a quasi-experimental design with a one-group pre-test and post-test design. The used instrument was four-tier diagnostic tests. It was used to see the improvement of students' fundamental concept and chemical representation on the sea pollutant migration concept. At the end of the class, most of the students' level was lack of knowledge 1 even scientific conception. The statistical data showed there was a significant mean difference between the students' pre-test and post-test, It clearly stated RADEC learning model gave an impact on students’ level of fundamental concepts and chemical representation. The improvement caused by the worksheet. It inspired students to create waste filters or chemical products that can absorb waste in the ocean even created sub-microscopic representations.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49647925","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 : 2021-08-06DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.24840
I. Maliki, A. E. Moussaoui, M. Ramdani, K. Elbadaoui
The aqueous extract of the leaves of Salvia officinalis planted in Morocco is analyzed using different methods in order to study the different phytochemical components (phytochemical screening) and to test in parallel the antioxidant, antibacterial and antifungal activities. The main phytochemical components of salvia officinalis are: phenolics complex 13.87±1.96 mg E.AG/g, flavonoids 7.38±1.91mg E.Q/g and tannins 0.18±0.03 μg E.Cat/g, as well as different concentrations of saponins, alkaloids and mucilage. The antioxidant activity is achieved by four different methods: the DPPH test (IC-50 = 8.2 μg/ml higher than BHT (1.2 μg/ml)); the s-carotene decolorization test (the inhibition of oxidation of the aqueous extract (64.2%) was greater than the negative control (13. 87%)); the reducing power test (FRAP) (detection of a low reducing power of iron for the aqueous extract compared to quercetin) and the total antioxidant capacity (CAT), this test revealed an antioxidant capacity of 103.7±5.8 mg/g. The aqueous extract of salvia officinalis leaves showed antibacterial activity against four pathogenic bacteria: E. coli 57, K. pneumoniae, P. aeruginosa, S. aureus, noting MIC values of 0.25mg/ml; 0.125mg/ml; 0. The extract showed antifungal activity against two yeasts (S. sereveseae (0.25 mg/mlet C. albicans 0.25 mg/ml), using the agar diffusion method and the direct contact method.
{"title":"Phytochemical screening and the antioxidant, antibacterial and antifungal activities of aqueous extracts from the leaves of Salvia officinalis planted in Morocco","authors":"I. Maliki, A. E. Moussaoui, M. Ramdani, K. Elbadaoui","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.24840","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.24840","url":null,"abstract":"The aqueous extract of the leaves of Salvia officinalis planted in Morocco is analyzed using different methods in order to study the different phytochemical components (phytochemical screening) and to test in parallel the antioxidant, antibacterial and antifungal activities. The main phytochemical components of salvia officinalis are: phenolics complex 13.87±1.96 mg E.AG/g, flavonoids 7.38±1.91mg E.Q/g and tannins 0.18±0.03 μg E.Cat/g, as well as different concentrations of saponins, alkaloids and mucilage. The antioxidant activity is achieved by four different methods: the DPPH test (IC-50 = 8.2 μg/ml higher than BHT (1.2 μg/ml)); the s-carotene decolorization test (the inhibition of oxidation of the aqueous extract (64.2%) was greater than the negative control (13. 87%)); the reducing power test (FRAP) (detection of a low reducing power of iron for the aqueous extract compared to quercetin) and the total antioxidant capacity (CAT), this test revealed an antioxidant capacity of 103.7±5.8 mg/g. The aqueous extract of salvia officinalis leaves showed antibacterial activity against four pathogenic bacteria: E. coli 57, K. pneumoniae, P. aeruginosa, S. aureus, noting MIC values of 0.25mg/ml; 0.125mg/ml; 0. The extract showed antifungal activity against two yeasts (S. sereveseae (0.25 mg/mlet C. albicans 0.25 mg/ml), using the agar diffusion method and the direct contact method.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45263480","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 : 2021-08-06DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27586
Wati Sukmawati, A. Kadarohman, O. Sumarna, W. Sopandi
This study aims to reduce COD (Chemical Oxygen Demand) levels in tofu waste using activated sludge. The method used to conduct this experiment is to use the fermentation method by grouping the tofu dregs samples into three groups. Then the tofu dregs sample was added with 1:3 activated sludge and incubated for two days, four days, and six days. The results showed that samples with an incubation period of 2 days had effectiveness in reducing COD levels in tofu waste as much as52.3%; during the incubation period of 4 days can reduce COD levels by 75.5%, and during the incubation period for six days have 79.8% effectiveness in reducing COD levels. A significant increase in the decrease in COD levels on the sixth day indicates that the microbes in activated sludge can multiply optimally to decompose waste and reduce COD levels optimally. In addition, the incubation time on the sixth day of the nutrients required by microbes increased, thereby increasing microbial activity. So it can be concluded that the incubation process of tofu dregs with activated sludge for six days is effective in reducing COD levels and can overcome environmental pollution problems.
{"title":"Analysis of reduction of COD (Chemical Oxygen Demand) levels in tofu waste using activated sludge method","authors":"Wati Sukmawati, A. Kadarohman, O. Sumarna, W. Sopandi","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.27586","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.27586","url":null,"abstract":"This study aims to reduce COD (Chemical Oxygen Demand) levels in tofu waste using activated sludge. The method used to conduct this experiment is to use the fermentation method by grouping the tofu dregs samples into three groups. Then the tofu dregs sample was added with 1:3 activated sludge and incubated for two days, four days, and six days. The results showed that samples with an incubation period of 2 days had effectiveness in reducing COD levels in tofu waste as much as52.3%; during the incubation period of 4 days can reduce COD levels by 75.5%, and during the incubation period for six days have 79.8% effectiveness in reducing COD levels. A significant increase in the decrease in COD levels on the sixth day indicates that the microbes in activated sludge can multiply optimally to decompose waste and reduce COD levels optimally. In addition, the incubation time on the sixth day of the nutrients required by microbes increased, thereby increasing microbial activity. So it can be concluded that the incubation process of tofu dregs with activated sludge for six days is effective in reducing COD levels and can overcome environmental pollution problems.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46639779","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 : 2021-08-05DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27583
R. Sukardi, W. Sopandi, Riandi
The purpose of the research was conducting expert validation on environmental pollution problems based on the fundamental chemistry concepts. The type of research was design and development that involved three experts as validators. Data processing was carried out using SPSS ver.26 through the Kendall test. The values of Asymp.Sig. showed that pre-learning questions were valid in terms of the compatibility of pre-learning questions with indicators of the national curriculum and SDGs, compatibility of pre-learning questions with creative thinking indicators, and clarity of language use. The pre-learning questions were divided into ten indicators. Most of them asked students to describe of how greenhouse gases, heavy metal, and solid or liquid nano-plastic destroy environment. Students explained and wrote the chemical representations of those processes, namely macroscopic, sub-microscopic, and symbolic. Pre-learning questions were valid because they have conducted a curriculum review and the needs analysis. Besides, the creation process also involved teachers who mastered fundamental concept of chemistry and understood the condition of students. The validated pre-learning question is expected to help teachers deliver the fundamental concepts of chemistry on environmental pollution well so that teachers can achieve learning objectives.
{"title":"Fundamental chemistry concepts on environmental pollution: Experts validation of pre-learning questions","authors":"R. Sukardi, W. Sopandi, Riandi","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.27583","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.27583","url":null,"abstract":"The purpose of the research was conducting expert validation on environmental pollution problems based on the fundamental chemistry concepts. The type of research was design and development that involved three experts as validators. Data processing was carried out using SPSS ver.26 through the Kendall test. The values of Asymp.Sig. showed that pre-learning questions were valid in terms of the compatibility of pre-learning questions with indicators of the national curriculum and SDGs, compatibility of pre-learning questions with creative thinking indicators, and clarity of language use. The pre-learning questions were divided into ten indicators. Most of them asked students to describe of how greenhouse gases, heavy metal, and solid or liquid nano-plastic destroy environment. Students explained and wrote the chemical representations of those processes, namely macroscopic, sub-microscopic, and symbolic. Pre-learning questions were valid because they have conducted a curriculum review and the needs analysis. Besides, the creation process also involved teachers who mastered fundamental concept of chemistry and understood the condition of students. The validated pre-learning question is expected to help teachers deliver the fundamental concepts of chemistry on environmental pollution well so that teachers can achieve learning objectives.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43218639","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 : 2021-08-05DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27582
B. Kisworo, A. Mudzakir, S. Liliasari
Abstract Chemistry of rare earth metals coordination complexes has a potential as a material for teaching and learning sustainable chemistry principles. System thinking has an important role to link the chemistry of rare earth metals coordination complexes to the principle of sustainability. This study was conducted to obtain scientist conception about chemistry of rare earth metals coordination complexes as sustainable material that emphasized enhancement students’ system thinking ability. The Method used is qualitative content analysis (inductive literature review type). It is includes the collection of research articles, descriptive analysis, category selection and material evaluation based on didactical view. The instrument used is a content analysis format related to the concept of rare earth metals coordination complexes. The results showed that the scientist’s conception of rare earth metals coordination complexes can be analyzed to qualitative with used inductive approach. The scientist’s conception was obtained which are important concepts such as synthesis, characterization, and application of material based on rare earth metals. The synthesis of coordination complexes is carried out using central atoms in the form of metals and/or rare earth ions with several ligands. The characterization of complexes compound conducted to determine their solubility, crystal structure, and physicochemical properties. Based on its application reviewed, chemistry of coordination complexes showed environmentally safe properties, society, and increase economic value.
{"title":"How does chemistry of rare earth metals coordination complexes can enhance system thinking ability? A qualitative content analysis study","authors":"B. Kisworo, A. Mudzakir, S. Liliasari","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.27582","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.27582","url":null,"abstract":"Abstract Chemistry of rare earth metals coordination complexes has a potential as a material for teaching and learning sustainable chemistry principles. System thinking has an important role to link the chemistry of rare earth metals coordination complexes to the principle of sustainability. This study was conducted to obtain scientist conception about chemistry of rare earth metals coordination complexes as sustainable material that emphasized enhancement students’ system thinking ability. The Method used is qualitative content analysis (inductive literature review type). It is includes the collection of research articles, descriptive analysis, category selection and material evaluation based on didactical view. The instrument used is a content analysis format related to the concept of rare earth metals coordination complexes. The results showed that the scientist’s conception of rare earth metals coordination complexes can be analyzed to qualitative with used inductive approach. The scientist’s conception was obtained which are important concepts such as synthesis, characterization, and application of material based on rare earth metals. The synthesis of coordination complexes is carried out using central atoms in the form of metals and/or rare earth ions with several ligands. The characterization of complexes compound conducted to determine their solubility, crystal structure, and physicochemical properties. Based on its application reviewed, chemistry of coordination complexes showed environmentally safe properties, society, and increase economic value.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47341990","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 : 2021-08-05DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27581
A. Shidiq, A. Permanasari, Hernani, S. Hendayana
This study aims to provide a bibliometric analysis on the topic of the simple spectrophotometer. By using the VOSviewer software, bibliometric analysis methods from 128 articles were used in this study. The articles were selected based on the inclusion and exclusion criteria predefined. The results of this study indicate that several simple spectrophotometer instruments have been used for teaching and learning in chemistry and other STEM areas, such as UV-Vis and photometers. This instrument was built by replacing the main components in the spectrophotometer, such as the light source and detector, to be simpler. The development of other types of spectrophotometers that involve students in building them can be a potential research alternative in Chemistry and other STEM areas. This research is expected to provide a better understanding of the challenges and opportunities of using a simple spectrophotometer for teaching and learning purposes.
{"title":"The use of simple spectrophotometer in STEM education: A bibliometric analysis","authors":"A. Shidiq, A. Permanasari, Hernani, S. Hendayana","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.27581","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.27581","url":null,"abstract":"This study aims to provide a bibliometric analysis on the topic of the simple spectrophotometer. By using the VOSviewer software, bibliometric analysis methods from 128 articles were used in this study. The articles were selected based on the inclusion and exclusion criteria predefined. The results of this study indicate that several simple spectrophotometer instruments have been used for teaching and learning in chemistry and other STEM areas, such as UV-Vis and photometers. This instrument was built by replacing the main components in the spectrophotometer, such as the light source and detector, to be simpler. The development of other types of spectrophotometers that involve students in building them can be a potential research alternative in Chemistry and other STEM areas. This research is expected to provide a better understanding of the challenges and opportunities of using a simple spectrophotometer for teaching and learning purposes.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43982967","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 : 2021-05-01DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.25855
A. Janati, Y. Ouzidan, Y. Rodi, F. O. Chahdi, M. Chraibi, K. F. Benbrahim, I. Alaoui, A. E. Hakmaoui, M. Safi, M. Akssira, E. Essassi
Some new structural motifs containing the quinoxaline nucleus have been synthesized and examined for their pharmacological properties. In this study, 6-chloroquinoxaline-2,3(1H, 4H)-dione and 6 nitroquinoxaline-2,3(1H, 4H)-dione were synthesized as basic nuclei for the preparation of the new quinoxaline-2,3-diones by alkylation reactions under the conditions of phase transfer catalysis. The products were characterized by spectroscopic methods 1 H and 13 C NMR. Then, the synthesized products were tested for their antibacterial effects against two bacterial strains. The values of minimum inhibitory concentrations (MIC) vary according to the nature of the alkyl bonded to the quinoxaline nucleus.
{"title":"Synthesis and antimicrobial activity of some quinoxaline derivatives","authors":"A. Janati, Y. Ouzidan, Y. Rodi, F. O. Chahdi, M. Chraibi, K. F. Benbrahim, I. Alaoui, A. E. Hakmaoui, M. Safi, M. Akssira, E. Essassi","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.25855","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.25855","url":null,"abstract":"Some new structural motifs containing the quinoxaline nucleus have been synthesized and examined for their pharmacological properties. In this study, 6-chloroquinoxaline-2,3(1H, 4H)-dione and 6 nitroquinoxaline-2,3(1H, 4H)-dione were synthesized as basic nuclei for the preparation of the new quinoxaline-2,3-diones by alkylation reactions under the conditions of phase transfer catalysis. The products were characterized by spectroscopic methods 1 H and 13 C NMR. Then, the synthesized products were tested for their antibacterial effects against two bacterial strains. The values of minimum inhibitory concentrations (MIC) vary according to the nature of the alkyl bonded to the quinoxaline nucleus.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46293682","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 : 2021-05-01DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.26239
Sameer Amereih, Abd Daraghmeh, Mohammmed Al-Nuri, M. Suleiman, A. Zarrouk, I. Warad
A novel Schiff base N'-((4-bromothiophen-2-yl) methylene) naphthalene-2-sulfonohydrazide ligand was prepared by condensation of equivalents amount of naphthalene -2-sulfonylhydrazide with 4-bromo-2-thiophenecarboxaldehyde. The newly synthesized ligand was isolated in excellent yield. CHN-EA, UV-Vis., GC/MS, FT-IR, 1 H and 13 C NMR were used to determine the structure of the desired ligand. Density functional theory DFT B3LYP/6-311G(d,p) was performed to optimize the E and Z- structural isomerization process. Several quantum calculation parameters like optimized bond length, angle ant torsional angels in addition to HOMO/LUMO, GRD, and MEP map, for both E and Z isomers have been calculated and compared under the same level of theory.
{"title":"Synthesis, NMR, DFT, GRD, MEP, FMO’s analysis and comparison of E and Z-isomer of N'-((4-bromothiophen-2-yl)methylene)naphthalene-2-sulfonohydrazide","authors":"Sameer Amereih, Abd Daraghmeh, Mohammmed Al-Nuri, M. Suleiman, A. Zarrouk, I. Warad","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.26239","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.26239","url":null,"abstract":"A novel Schiff base N'-((4-bromothiophen-2-yl) methylene) naphthalene-2-sulfonohydrazide ligand was prepared by condensation of equivalents amount of naphthalene -2-sulfonylhydrazide with 4-bromo-2-thiophenecarboxaldehyde. The newly synthesized ligand was isolated in excellent yield. CHN-EA, UV-Vis., GC/MS, FT-IR, 1 H and 13 C NMR were used to determine the structure of the desired ligand. Density functional theory DFT B3LYP/6-311G(d,p) was performed to optimize the E and Z- structural isomerization process. Several quantum calculation parameters like optimized bond length, angle ant torsional angels in addition to HOMO/LUMO, GRD, and MEP map, for both E and Z isomers have been calculated and compared under the same level of theory.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45132097","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 : 2021-03-25DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.25684
S. Anggraeni, A. Nandiyanto, A. M. Nurjami, S. N. Hofifah, Silmi, Ridwan Putri, G. C. S. Girsang, M. Fiandini
The purpose of this study was to determine the effect of the addition of palm oil and cinnamon on the physicochemical, mechanical, and biodegradation properties of cornstarch-based bioplastic. Experiments were done by adding cornstarch into water, glycerol, acetic acid, and cinnamon. Then, the mixed suspension was heated at 100⁰C, added with palm oil (0.19; 0.30; 0.60; 0.90; 1.30; 1.90 %(v/v)), molded, and dried at room temperature without exposure to sunlight. To support the analysis, several characterizations (i.e. FTIR, digital microscope, puncture test, compressive test, and biodegradability test) were conducted. Based on puncture and compressive test, the bioplastic with an addition of 1.90 %(v/v) palm oil showed good mechanical properties. In general, the addition of palm oil increased the biodegradation rate. The palm oil contains double bonds in unsaturated fatty acids that can be distributed to the bioplastic matrix. Higher lipid content caused less moisture in the bioplastic so that the bioplastic was more brittle, inelastic, and degradable. However, the antimicrobial amount in the cinnamon reduced the biodegradability of bioplastic. This research provided new information on bioplastics as environmentally friendly plastic and alternative to conventional plastic.
{"title":"Palm oil and cinnamon (anti-microbial agent) on the physicochemical, mechanical, and biodegradation properties of micrometer-sized cornstarch-based bioplastic","authors":"S. Anggraeni, A. Nandiyanto, A. M. Nurjami, S. N. Hofifah, Silmi, Ridwan Putri, G. C. S. Girsang, M. Fiandini","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.25684","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.25684","url":null,"abstract":"The purpose of this study was to determine the effect of the addition of palm oil and cinnamon on the physicochemical, mechanical, and biodegradation properties of cornstarch-based bioplastic. Experiments were done by adding cornstarch into water, glycerol, acetic acid, and cinnamon. Then, the mixed suspension was heated at 100⁰C, added with palm oil (0.19; 0.30; 0.60; 0.90; 1.30; 1.90 %(v/v)), molded, and dried at room temperature without exposure to sunlight. To support the analysis, several characterizations (i.e. FTIR, digital microscope, puncture test, compressive test, and biodegradability test) were conducted. Based on puncture and compressive test, the bioplastic with an addition of 1.90 %(v/v) palm oil showed good mechanical properties. In general, the addition of palm oil increased the biodegradation rate. The palm oil contains double bonds in unsaturated fatty acids that can be distributed to the bioplastic matrix. Higher lipid content caused less moisture in the bioplastic so that the bioplastic was more brittle, inelastic, and degradable. However, the antimicrobial amount in the cinnamon reduced the biodegradability of bioplastic. This research provided new information on bioplastics as environmentally friendly plastic and alternative to conventional plastic.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43956453","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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