Moroccan Journal of Chemistry最新文献_第4页

Assessment and characterization of the physicochemical parameters of Moroccan leachate during the confinement period (coronavirus) 摩洛哥渗滤液禁闭期(冠状病毒)理化参数的评价与表征

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Moroccan Journal of Chemistry Pub Date : 2021-08-06 DOI: 10.48317/IMIST.PRSM/morjchem-v9i2.27594

A. Ourhedja, Y. Miyah, M. Bargach, F. Zerrouq, R. Tadili

引用次数: 1

Fundamental concepts and chemical representations on sea pollutant migration: can it be improved through RADEC 海洋污染物迁移的基本概念和化学表征：能否通过RADEC加以改进

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Moroccan Journal of Chemistry Pub Date : 2021-08-06 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27585

A. Sujana, R. Sukardi, M. Rosbiono, W. Sopandi

引用次数: 3

Phytochemical screening and the antioxidant, antibacterial and antifungal activities of aqueous extracts from the leaves of Salvia officinalis planted in Morocco 摩洛哥鼠尾草叶水提物的植物化学筛选及其抗氧化、抗菌和抗真菌活性

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Moroccan Journal of Chemistry Pub Date : 2021-08-06 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.24840

I. Maliki, A. E. Moussaoui, M. Ramdani, K. Elbadaoui

{"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}

引用次数: 4

Analysis of reduction of COD (Chemical Oxygen Demand) levels in tofu waste using activated sludge method 活性污泥法降低豆腐渣化学需氧量的分析

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Moroccan Journal of Chemistry Pub Date : 2021-08-06 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27586

Wati Sukmawati, A. Kadarohman, O. Sumarna, W. Sopandi

{"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}

引用次数: 3

Fundamental chemistry concepts on environmental pollution: Experts validation of pre-learning questions 环境污染的基础化学概念:专家对学习前问题的验证

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Moroccan Journal of Chemistry Pub Date : 2021-08-05 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27583

R. Sukardi, W. Sopandi, Riandi

{"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}

引用次数: 0

How does chemistry of rare earth metals coordination complexes can enhance system thinking ability? A qualitative content analysis study 稀土金属配位配合物化学如何提高系统思维能力？定性内容分析研究

IF 1.1

Moroccan Journal of Chemistry Pub Date : 2021-08-05 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27582

B. Kisworo, A. Mudzakir, S. Liliasari

{"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}

引用次数: 0

The use of simple spectrophotometer in STEM education: A bibliometric analysis 简单分光光度计在STEM教育中的应用:文献计量学分析

IF 1.1

Moroccan Journal of Chemistry Pub Date : 2021-08-05 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27581

A. Shidiq, A. Permanasari, Hernani, S. Hendayana

引用次数: 9

Synthesis and antimicrobial activity of some quinoxaline derivatives 喹诺啉类衍生物的合成及抗菌活性研究

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Moroccan Journal of Chemistry Pub Date : 2021-05-01 DOI: 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

引用次数: 4

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 N′-((4-溴噻吩-2-酰基)亚甲基)萘-2-磺酰肼E、z异构体的合成、NMR、DFT、GRD、MEP、FMO分析与比较

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Moroccan Journal of Chemistry Pub Date : 2021-05-01 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.26239

Sameer Amereih, Abd Daraghmeh, Mohammmed Al-Nuri, M. Suleiman, A. Zarrouk, I. Warad

引用次数: 1

Palm oil and cinnamon (anti-microbial agent) on the physicochemical, mechanical, and biodegradation properties of micrometer-sized cornstarch-based bioplastic 棕榈油和肉桂(抗菌剂)对微米级玉米淀粉基生物塑料的理化、机械和生物降解性能的影响

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Moroccan Journal of Chemistry Pub Date : 2021-03-25 DOI: 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

{"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}

引用次数: 1