JKPK (Jurnal Kimia dan Pendidikan Kimia)最新文献

Analysis of Students’ Critical Thinking Skills by Applying Flipped Classroom Learning Model using Powtoon Application on The Topic of Salt Hydrolysis 运用翻转课堂学习模式对盐水解课学生批判性思维能力的分析

JKPK (Jurnal Kimia dan Pendidikan Kimia) Pub Date : 2022-12-31 DOI: 10.20961/jkpk.v7i3.67802

M. Paristiowati, Elsa Vera Nanda, Nur Azizah Putri Hasibuan, M. Z. Ilmana

{"title":"Analysis of Students’ Critical Thinking Skills by Applying Flipped Classroom Learning Model using Powtoon Application on The Topic of Salt Hydrolysis","authors":"M. Paristiowati, Elsa Vera Nanda, Nur Azizah Putri Hasibuan, M. Z. Ilmana","doi":"10.20961/jkpk.v7i3.67802","DOIUrl":"https://doi.org/10.20961/jkpk.v7i3.67802","url":null,"abstract":"This study aims to determine students' critical thinking skills by applying flipped classrooms using the Powtoon application on the topic of salt hydrolysis. This study, which included 36 participants—15 men and 21 women—used a descriptive methodology and was carried out at one of Jakarta's public high schools. The instrument used was an observation sheet to observe the flipped classroom model’s learning process, critical thinking skills tests, reflective journals, and depth interviews. The flipped classroom method entails four steps: pre-class by studying independently and providing stimuli. In-class by fostering critical thinking; and post-class by evaluating. Combining asynchronous and synchronous activities was the process. Students learn independently during the pre-class stage by answering pre-learning questions and watching videos. During the class phase, Zoom meetings are used for synchronous learning to discuss salt hydrolysis applications in particular contexts. Discussion assignments on the salt hydrolysis case help students learn asynchronously after class. The study results showed that the flipped classroom using the Powtoon application can be an alternative for distance learning and can influence the students’ critical thinking at a very good level. It also helps them be more active and critical in learning, like exchanging opinions with others and doing assignments on the topic of salt hydrolysis.","PeriodicalId":394335,"journal":{"name":"JKPK (Jurnal Kimia dan Pendidikan Kimia)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115852246","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

Analysis of The Nature of Science in Chemistry Textbooks on The Topic Acid-Base Equilibrium: a Content Analysis 《酸碱平衡》化学教材的科学性质分析:内容分析

JKPK (Jurnal Kimia dan Pendidikan Kimia) Pub Date : 2022-12-30 DOI: 10.20961/jkpk.v7i3.65094

A. Rahmah, S. Ariani, B. Mulyani

{"title":"Analysis of The Nature of Science in Chemistry Textbooks on The Topic Acid-Base Equilibrium: a Content Analysis","authors":"A. Rahmah, S. Ariani, B. Mulyani","doi":"10.20961/jkpk.v7i3.65094","DOIUrl":"https://doi.org/10.20961/jkpk.v7i3.65094","url":null,"abstract":"This study was conducted to describe aspects of the Nature of Science (NoS), its presentation, and its scores from chemistry textbooks used in Surakarta on acid-base equilibrium topics. This research was qualitative research with a content analysis method. Three high school chemistry textbooks for class XI from different publishers were analyzed by two raters based on ten aspects of the NoS. Interrater reliability was calculated using the cohen Kappa. The results showed that a scientific law is the only aspect that is not included in the three textbooks A, B, and C. Other aspects of NoS contained in textbooks A and B are slightly different from textbook C. Textbooks A and B contain the same aspects: empirical, inferential, creative, theory-driven, tentative, scientific methods, scientific theories, social science, and the application of science in socio-cultural, while textbook C does not contain tentative and theory-driven aspects. The implicit-correct category dominates the presentation of the NoS aspects in the textbooks. Presentations with implicit-incorrect and explicit-incorrect categories were not found in this study. The scores obtained by textbooks A, B, and C based on the presentation of aspects of NoS are 9, 11, and 8, respectively, of the maximum total score that can be obtained of 30. It did not show the presence of the NoS aspects explicitly, correctly, consistently, and completely, so textbooks containing NoS explicitly are required. Teachers also need to guide students in interpreting NoS in learning. ","PeriodicalId":394335,"journal":{"name":"JKPK (Jurnal Kimia dan Pendidikan Kimia)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115751489","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

Molecular Docking of Shallot (Allium ascalonicum) Active Compounds to Lanosterol Enzym 14-Alpha Demethylase and Squalene Monooxygenase for Antifungi Potential Activity 葱(Allium ascalonicum)活性化合物与羊毛甾醇酶14- α去甲基化酶和角鲨烯单加氧酶的分子对接研究

JKPK (Jurnal Kimia dan Pendidikan Kimia) Pub Date : 2022-12-29 DOI: 10.20961/jkpk.v7i3.45999

Eka Sukmawaty, Nur Alfisah, Masriany Masriany, H. Hafsan

{"title":"Molecular Docking of Shallot (Allium ascalonicum) Active Compounds to Lanosterol Enzym 14-Alpha Demethylase and Squalene Monooxygenase for Antifungi Potential Activity","authors":"Eka Sukmawaty, Nur Alfisah, Masriany Masriany, H. Hafsan","doi":"10.20961/jkpk.v7i3.45999","DOIUrl":"https://doi.org/10.20961/jkpk.v7i3.45999","url":null,"abstract":"Shallots (Allium ascalonicum) are one of the important horticultural export commodities in Indonesia, but the productivity of shallots has decreased due to the attack of pathogenic fungi. This study was aimed to determine the potential of active shallot compounds as ligands for inhibiting the activity of the enzyme lanosterol 14-alpha demethylase (ID: 4LXJ) and squalene monooxygenase (ID: 6C6R) enzymes which play an important role in the biosynthesis of ergosterol or fungal cell membranes. The molecular docking used the Autodock Vina (PyRx) program, an analysis of molecule interaction used PyMol, and Discovery Studio 2019 to analyze the types of bonds between molecules. Thirty-nine ligands from shallot compounds are docked to the anti-fungal target protein. The results showed ascalonicoside A1, ascalonicoside A2, ascalonicoside B, quercetin, isorhamnetin, quercetin di glucoside, quercetin tri glucoside, ethyl palmitate and benzyl salicylate have the potential to be anti-fungal to the enzyme lanosterol 14-alpha demethylase and squalene monooxygenase enzyme that responds to the synthesis of fungi cell wall. These ligand compounds bind to the target protein's amino acid residues with hydrogen and hydrophobic bonds. This research showed that shallot was the potential to be replicated as an anti-fungus for many purposes.","PeriodicalId":394335,"journal":{"name":"JKPK (Jurnal Kimia dan Pendidikan Kimia)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132015883","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

Conventional and Microwave-Assisted Synthesis of 4’-Bromochalchone Utilizing 4-Bromoacetophenone and Benzaldehyde as Starting Material in Alkaline Condition 以4-溴苯乙酮和苯甲醛为原料在碱性条件下常规和微波辅助合成4 ' -溴查酮

JKPK (Jurnal Kimia dan Pendidikan Kimia) Pub Date : 2022-12-25 DOI: 10.20961/jkpk.v7i3.66765

Iin Narwanti, Hanna Nur Aisyah Afifah

{"title":"Conventional and Microwave-Assisted Synthesis of 4’-Bromochalchone Utilizing 4-Bromoacetophenone and Benzaldehyde as Starting Material in Alkaline Condition","authors":"Iin Narwanti, Hanna Nur Aisyah Afifah","doi":"10.20961/jkpk.v7i3.66765","DOIUrl":"https://doi.org/10.20961/jkpk.v7i3.66765","url":null,"abstract":"This study focuses on synthesizing 4’-bromochalcone through conventional and irradiation microwave methods to determine each method's time efficiency and yield. 4-Bromoacetophenone was treated with benzaldehyde in the presence of a base. Conventionally, the reaction mixture was stirred at room temperature. While in the microwave irradiation method, the reaction mixture was irradiated at a power of 140 watts. The compound was identified, including the melting point and physicochemical properties. The structure of the compound was confirmed by infrared, 1H- and 13C-nuclear magnetic resonance, and mass spectroscopy spectral data. The results showed that 4’-bromochalcone had been successfully synthesized using conventional and microwave irradiation methods in a good yield (94.61%±0.6793 and 89.39%±0.6418, consecutively). The structure assignment based on infrared, 1H- and 13C-nuclear magnetic resonance, and mass spectroscopy spectral data revealed that the synthesized product was 4’-bromochalcone. Synthesis of 4’-bromochalchone using microwave irradiation could be done in a shorter time than the conventional method. ","PeriodicalId":394335,"journal":{"name":"JKPK (Jurnal Kimia dan Pendidikan Kimia)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130909322","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

A Green Synthesis of Acetyl Eugenol by Sonochemical Method and Potential as Anti-Inflammatory In-Vitro 乙酰丁香酚的声化学绿色合成及其体外抗炎活性研究

JKPK (Jurnal Kimia dan Pendidikan Kimia) Pub Date : 2022-12-25 DOI: 10.20961/jkpk.v7i3.66630

R. S. Dinurrosifa, E. Indriyanti

{"title":"A Green Synthesis of Acetyl Eugenol by Sonochemical Method and Potential as Anti-Inflammatory In-Vitro","authors":"R. S. Dinurrosifa, E. Indriyanti","doi":"10.20961/jkpk.v7i3.66630","DOIUrl":"https://doi.org/10.20961/jkpk.v7i3.66630","url":null,"abstract":"Clove oil is an essential oil from the clove plant (Syzygium aromaticum) containing eugenol compounds. One of the properties of eugenol is as an anti-inflammatory with a mechanism of inhibition of prostaglandin synthesis and neutrophil chemotaxis. Several derivatives of eugenol have active compounds that have been developed into new drug compounds as anti-inflammatory such as acetyl eugenol (4-allyl-2-methoxyphenyl acetate). This study aims to determine the % yield of acetyl eugenol produced from synthesis using ultrasonic 0.0323 mol of eugenol added to Erlenmeyer, and 0.25 mol of 10% sodium hydroxide was added. The mixture was put in a sonicator for 15 minutes and heated at 600C. Then, 0.0974 mol acetic anhydride was reacted with DCC, added to the mix and sonicated with time variations (60, 80, and 100 minutes). The chemical structure was elucidated using FTIR, ATR, and GC-MS. The synthesized % yield is 32.75%. Based on the interpretation data from FTIR, 3405 cm-1 is an O-H group (free phenol), 1405 cm-1 is an alkene group (C=C) aliphatic, and 1560 cm-1 is an aromatic compound with the presence of a C=C aromatic bond. The presence of the (C-O) ether group is indicated in the wave number at 1301 cm-1. The C=O ester bond in the ester group is shown at 1700 cm-1. GC-MS shows that the synthesized compound has a molecular ion with m/z = 206. According to the molecular weight of acetyl eugenol of 206 g/mol, it can be concluded that acetyl eugenol was successfully synthesized. The most stable ionic fragment, 37, has a molecular weight of m/z = 164. The activities of anti-inflammatory, acetyl eugenol compounds at 400 concentration ppm get % inhibition of 32.20%. ","PeriodicalId":394335,"journal":{"name":"JKPK (Jurnal Kimia dan Pendidikan Kimia)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115859609","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

Comparison Study of Ionic Gelation and SNEDDs Method in the Preparation of Cocoa Peel Extract Nanoparticles as Antibacterial Against Klebsiella pneumonia 离子凝胶法制备可可皮提取物纳米粒抗肺炎克雷伯菌的比较研究

JKPK (Jurnal Kimia dan Pendidikan Kimia) Pub Date : 2022-12-25 DOI: 10.20961/jkpk.v7i3.65133

R. Lestari, T. Julianto, Y. Syukri, Aditya Wicaksana, I. Tahir

{"title":"Comparison Study of Ionic Gelation and SNEDDs Method in the Preparation of Cocoa Peel Extract Nanoparticles as Antibacterial Against Klebsiella pneumonia","authors":"R. Lestari, T. Julianto, Y. Syukri, Aditya Wicaksana, I. Tahir","doi":"10.20961/jkpk.v7i3.65133","DOIUrl":"https://doi.org/10.20961/jkpk.v7i3.65133","url":null,"abstract":"Cocoa peel is the primary waste from chocolate production. It contains flavonoids that can inhibit the growth of Klebsiella pneumonia which causes chronic bronchitis. This study aims to obtain cocoa peel extract nanoparticles for antibacterial caused by K. pneumonia. The isolation of flavonoids was done using the maceration method in 96% ethanol. Phytochemical and Thin Layer Chromatography (TLC) analyses have been used to identify the active compounds contained in the extract. Flavonoid levels have been investigated using UV-Visible spectrophotometry. The preparation of nanoparticles from cocoa peel used ionic gelation and Self-Nano Emulsifying Drug Delivery System (SNEDDS). The nanoparticle obtained has been analyzed for particle size and polydisperse index. In vitro test was carried out to determine the antibacterial activity of K. pneumonia. Identification of active compounds using a UV-Visible spectrophotometer showed that cocoa peel extract contained flavonoids of 6.33%. Nanoparticle preparations using the SNEDDS method were more optimal than the ionic gelation method, with particle sizes 135.2 nm (4%), 156.1 nm (12%), and 235.3 (20%). Based on the in vitro test, nanoparticles from cocoa peel extract were able to inhibit the growth of K. pneumonia.","PeriodicalId":394335,"journal":{"name":"JKPK (Jurnal Kimia dan Pendidikan Kimia)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126181335","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 Adsorption Performance and Characterization of Activated Charcoal of Bone Char Against Acid Orange 7 骨炭活性炭对酸性橙的吸附性能及表征

JKPK (Jurnal Kimia dan Pendidikan Kimia) Pub Date : 2022-12-22 DOI: 10.20961/jkpk.v7i3.66556

S. Fatimah, Y. R. Azinuddin

引用次数: 0

Green Synthesis of Silver Nanoparticles via Cratoxylum glaucum Leaf Extract Loaded Polyvinyl Alcohol and Its Antibacterial Acitvity 白曲霉叶提取物载聚乙烯醇绿色合成纳米银及其抗菌活性研究

JKPK (Jurnal Kimia dan Pendidikan Kimia) Pub Date : 2022-12-22 DOI: 10.20961/jkpk.v7i3.64719

V. Fabiani, Rahmad Lingga

引用次数: 0

1H and 13C NMR Study of Oligosuccinimide Prepared by Thermal Condensation and Evaluation of Its Scale Inhibition 热缩合制备的低聚琥珀酰亚胺的1H和13C NMR研究及其阻垢性能评价

JKPK (Jurnal Kimia dan Pendidikan Kimia) Pub Date : 2022-12-11 DOI: 10.20961/jkpk.v7i3.65666

M. J. Baari, M. Megawati, D. P. Benu

{"title":"1H and 13C NMR Study of Oligosuccinimide Prepared by Thermal Condensation and Evaluation of Its Scale Inhibition","authors":"M. J. Baari, M. Megawati, D. P. Benu","doi":"10.20961/jkpk.v7i3.65666","DOIUrl":"https://doi.org/10.20961/jkpk.v7i3.65666","url":null,"abstract":"The presence of scale is a serious problem in the petroleum industry, and some efforts should be made to control scale formation. Oligosuccinimide (OSI) is an oligomer with several repeating units of succinimide. The structure of the OSI main chain and end groups has never been comprehensively analyzed. Meanwhile, OSI is potentially a scale inhibitor due to chelating properties, high polarity, and high solubility. This study investigates the molecular structure of oligosuccinimide, focusing on the main chain and end groups. Synthesis was carried out by thermal condensation between maleic anhydride and ammonium carbonate using a 1H and 13C NMR spectroscope equipped with Distortionless Enhancement by Polarization Transfer 135, Heteronuclear Multiple Quantum Coherence, and Single Quantum Coherence. The NMR analysis results detected the presence of the main chain and several synthesized OSI end groups, such as the amino, succinimide, and maleimide end groups. However, the dicarboxylic acid end group and other irregular structures, as in polysuccinimide (various synthesis methods), were not identified. It confirmed that our thermal condensation method produced OSI with less irregular structures than previous methods. Evaluation of OSI as CaCO3 and CaSO4 scales inhibitor showed reasonably good performance in very small concentrations. The inhibition efficiency was 73.20% for the CaCO3 scale with 10 mg.L-1 and 55.29% for the CaSO4 scale with 10 mg.L-1 inhibitor concentration. Analysis of thermal stability informed OSI has good thermal stability because it started to be degraded at 353.38 °C.","PeriodicalId":394335,"journal":{"name":"JKPK (Jurnal Kimia dan Pendidikan Kimia)","volume":"339 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133910843","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

Recovery of Valuable Metals from Fly Ash via Hydrometallurgy Method for Li-ion Battery Anode Material 湿法冶金法从飞灰中回收锂离子电池负极材料中有价金属

JKPK (Jurnal Kimia dan Pendidikan Kimia) Pub Date : 2022-12-08 DOI: 10.20961/jkpk.v7i3.64740

C. Yudha, E. Apriliyani, T. Paramitha, Windhu Griyasti Suci, H. S. A. Gustiana

{"title":"Recovery of Valuable Metals from Fly Ash via Hydrometallurgy Method for Li-ion Battery Anode Material","authors":"C. Yudha, E. Apriliyani, T. Paramitha, Windhu Griyasti Suci, H. S. A. Gustiana","doi":"10.20961/jkpk.v7i3.64740","DOIUrl":"https://doi.org/10.20961/jkpk.v7i3.64740","url":null,"abstract":"Coal-derived fly ash, or CFA, is a harmful waste for humans. CFA waste handling by its processing and utilization has become the most promising approach, which not only decreases the waste's hazard level but also improves its economic potential. This research aims to recover metals from CFA and utilize them as anode material for Li-ion batteries. Iron, magnesium, aluminum, and calcium are retrieved from the CFA via a two-step hydrometallurgical method, i.e., acid leaching followed by alkaline precipitation. The leaching process utilizes various acids, such as acetic acid (CH3COOH), hydrochloric acid (HCl) and sulfuric acid (H2SO4). Metal precipitation is carried out using sodium hydroxide solution (NaOH). Morphological and quantitative metal composition analysis are investigated using a scanning electron microscope and energy dispersive spectroscopy (SEM-EDX). The physical and chemical properties of the as-prepared samples are characterized using Fourier-transformed Infra-red spectroscopy (FTIR) and Thermal Gravimetry-Differential Thermal Analysis (TG/DTA). Based on the analysis, iron, magnesium and calcium are successfully recovered in a mixed hydroxide precipitate. The type of acid affects the final morphology and composition of the product. Therefore, our approach can be considered effective in CFA waste processing and producing high-quality product.","PeriodicalId":394335,"journal":{"name":"JKPK (Jurnal Kimia dan Pendidikan Kimia)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115365952","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