Jurnal Pendidikan Kimia最新文献_第8页

The effectiveness of modified flip-based argumentation learning in improving students’ argumentation skills about hydrocarbon 改进的翻转式论证学习对提高学生油气类论证能力的效果

Jurnal Pendidikan Kimia Pub Date : 2021-12-08 DOI: 10.24114/jpkim.v13i3.29930

A. Agustiningsih, N. Ngatijo, Muhammad Haris Effendi-hasibuan

{"title":"The effectiveness of modified flip-based argumentation learning in improving students’ argumentation skills about hydrocarbon","authors":"A. Agustiningsih, N. Ngatijo, Muhammad Haris Effendi-hasibuan","doi":"10.24114/jpkim.v13i3.29930","DOIUrl":"https://doi.org/10.24114/jpkim.v13i3.29930","url":null,"abstract":"The FBAL learning model is a learning model that has a specific purpose to improve students’ argumentation skills by integrating Toulmin's argumentation pattern. This study aimed to see the effectiveness of the Modified Flip-Based Argumentation Learning in improving students' argumentation skills about the concept of hydrocarbon compounds. The effectiveness was examined by comparing this model to Flip-Based Argumentation Learning and Flipped Classroom model. The factors that influence the differences in students’ argumentation skills amongst the three classes were also investigated. Concurrent embedded mix method design was used in this study. Some 93 students of 11 grade of SMA Negeri 1 Merangin Jambi were participated in this study. Data were collected using argumentation test (pre-test and post-test) and observations. The results showed that there was no difference between the Modified FBAL and FBAL in improving the students’ argumentation skills but both were different from the Flipped Classroom. The N-gain was 0.80 and 0.81 respectively for the Modified FBAL and FBAL. However, those were higher than the N-Gain of Flipped Classroom which was 0.71. Difference in providing the students with opportunities to practice their argumentation skills amongst the three models was the major factors influencing the students' argumentation skills in the three classes.","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87241710","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 effectiveness of argumentation based learning and problem based learning models in improving student’s argumentation skills about salt hydrolysis concept 基于论证的学习模式和基于问题的学习模式在提高学生关于盐水解概念的论证能力方面的有效性

Jurnal Pendidikan Kimia Pub Date : 2021-12-08 DOI: 10.24114/jpkim.v13i3.29928

Ani Puspita Sari, Harizon Harizon, Muhammad Haris Effendi-hasibuan

{"title":"The effectiveness of argumentation based learning and problem based learning models in improving student’s argumentation skills about salt hydrolysis concept","authors":"Ani Puspita Sari, Harizon Harizon, Muhammad Haris Effendi-hasibuan","doi":"10.24114/jpkim.v13i3.29928","DOIUrl":"https://doi.org/10.24114/jpkim.v13i3.29928","url":null,"abstract":"Learning model that can train students in developing their argumentative skills includes the Argumentation Based Learning (ABL) and Problem Based Learning (PBL). This study aimed to see the effectiveness of the ABL and PBL models in improving students' argumentation skills about the concept of salt hydrolysis. The study was conducted in the class XI MIA SMAN 1 Tebo Jambi with a sample consisting of two classes. Some 50 students were recruited purposively to be the participants of this study. Concurrent embedded mix method using two group pretest posttest control group design was used in this study. The results of independent t-test showed that ABL was more effective than PBL (t= 4.864; p-value=0.00 < 0.05) in improving the students' argumentation skills. This was supported by the N-gain test of ABL which was 0.82 and the N -Gain test of PBL was 0.68. The results of observations revealed that the ABL students had more intensive opportunities to debate their argumentation than those in the PBL class. This was believed as the major factor influencing the difference in the students’ argumentation skills.","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84618074","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

Biodegradable plastic modification from durian seed starch and shrimp chitosan with the addition of plasticiziers glycerol and polyglycerol using microwaves 以榴莲淀粉和虾壳聚糖为原料，添加增塑剂甘油和聚甘油，微波改性生物可降解塑料

Jurnal Pendidikan Kimia Pub Date : 2021-12-01 DOI: 10.24114/jpkim.v13i3.29017

Saud Salomo, Astri Devi Br Pakpahan, Dea Gracella Siagian, Grecy Kristina Tampubolon, Salsabila Afani, E. Eddiyanto, J. Sihombing

{"title":"Biodegradable plastic modification from durian seed starch and shrimp chitosan with the addition of plasticiziers glycerol and polyglycerol using microwaves","authors":"Saud Salomo, Astri Devi Br Pakpahan, Dea Gracella Siagian, Grecy Kristina Tampubolon, Salsabila Afani, E. Eddiyanto, J. Sihombing","doi":"10.24114/jpkim.v13i3.29017","DOIUrl":"https://doi.org/10.24114/jpkim.v13i3.29017","url":null,"abstract":"Plastic waste takes up to 450 years to decompose. These problems can be overcome by creating other alternatives, one of which is by using biodegradable plastic. Biodegradable plastics are plastics made from natural polymers that are easily degraded by microorganisms. This study aims to examine the effect of the amount of plasticizer on the length of the degradation process and the effect of using microwaves on the length of time for molding biodegradable plastic. This biodegradable plastic is made by combining durian seed starch, shrimp chitosan and plasticizers in the form of glycerol and polyglycerol with volume variations of 1 mL, 2 mL, 3 mL, 4 mL, and 5 mL. This polymerization was carried out using a microwave with a power of 100 watts for 60 minutes. The resulting biodegradable plastics were characterized using the FTIR test, the Mechanical Properties test, the Absorbency test, and the Biodegradation test to determine the quality of the biodegradable plastic. The results of this study indicate the greatest tensile strength value is 1.9768 MPa, the largest elongation value is 21.2772%, the smallest water absorption is 45.40% for 5 minutes, and the largest degraded mass is 0.908 grams for 7 days. Based on this research, it can be concluded that the use of polyglycerol can accelerate the plastic degradation process. In addition, the use of microwaves can speed up the molding time of biodegradable plastics.","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75810451","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

Determination of phenolic contents and antioxidant activity test of ethanol extract of Sirih merah (Piper crocatum Ruiz & Pav.) leaves using the DPPH method DPPH法测定西葫芦叶乙醇提取物酚类物质含量及抗氧化活性试验

Jurnal Pendidikan Kimia Pub Date : 2021-08-01 DOI: 10.24114/jpkim.v13i2.26984

K. Gurning, Sifikal Lumbangaol, R. Situmorang, S. Silaban

引用次数: 4

Microsoft teams 365 and online learning: The student’s perception 微软团队365和在线学习:学生的看法

Jurnal Pendidikan Kimia Pub Date : 2021-08-01 DOI: 10.24114/jpkim.v13i2.26981

L. Purba

引用次数: 5

Development of PBL-STEM-based E-LKPD to improve students' science literacy skills on reaction rate materials 开发基于pbl - stem的E-LKPD，提高学生对反应速率材料的科学素养

Jurnal Pendidikan Kimia Pub Date : 2021-08-01 DOI: 10.24114/jpkim.v13i2.26980

R. Safitri, H. Haryanto, Harizon Harizon

{"title":"Development of PBL-STEM-based E-LKPD to improve students' science literacy skills on reaction rate materials","authors":"R. Safitri, H. Haryanto, Harizon Harizon","doi":"10.24114/jpkim.v13i2.26980","DOIUrl":"https://doi.org/10.24114/jpkim.v13i2.26980","url":null,"abstract":"The development model used is Research & Development which adopts the Lee & Owens development model. The product to be developed is E-LKPD using 3D Pageflip Professional software. 1. The procedure for developing E-LKPD with the PBL-STEM approach in improving scientific literacy skills on the reaction rate material for students. The research procedure consists of five stages, namely analysis, design, development, implementation, evaluation. Research results (1) The analysis includes media analysis, student characteristics analysis, technology analysis, situation analysis, and data analysis. (2) Design includes determining the development team, compiling a development schedule, making flowcharts and making storyboards. (3) Development includes making a product which is then validated by a team of experts until it is validated. (4) Implementation, at this stage a product assessment is carried out by 2 chemistry teachers to see the agreement between the two teachers on the product developed through the kappa test, one-on-one trial with 2 groups of respondents consisting of 3 students in each group, small group trial with two groups of respondents carried out at MAN 2 Jambi City. This trial is not conducted face-to-face, but online (5) Evaluation, which is carried out at each stage is ongoing. The conclusion in this study is that the E-LKPD development procedure is in accordance with the 5 stages of the Lee & Owens development model. Keywords: E-LKPD, PBL-STEM, Science literacy skills","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"166 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75962678","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

Stability of Styrax benzoin extract and fraction with the addition of glycerol and tween 80 苯甲酸Styrax benzoin提取物和馏分在添加甘油和吐温80时的稳定性

Jurnal Pendidikan Kimia Pub Date : 2021-08-01 DOI: 10.24114/jpkim.v13i2.26986

Dedi P Simatupang, Nora Susanti, J. Purba

{"title":"Stability of Styrax benzoin extract and fraction with the addition of glycerol and tween 80","authors":"Dedi P Simatupang, Nora Susanti, J. Purba","doi":"10.24114/jpkim.v13i2.26986","DOIUrl":"https://doi.org/10.24114/jpkim.v13i2.26986","url":null,"abstract":"This research to decide the consequences of expanding the steadiness of the concentrate and part of incense with the expansion of glycerol and tween 80 by contrasting the reference tests of frankincense separates available. The technique utilized in this examination depends on the expansion of glycerol and tween 80, just as directing boundaries of consistency, organoleptic, pH and investigation of substance content of concentrates and parts with GC-MS instruments. The outcomes got in this investigation demonstrate the actual properties of the concentrate and part of the incense sap as a thick fluid, earthy red and has an unmistakable fragrant smell. The consistency got from the thickness test was 277.68 Cp. In the meantime, the thickness estimation consequences of the reference test acquired a consistency worth of 326.54 cP. What's more, has a pH scope of 4.0-5.5. The fundamental synthetic parts of the extraction results and the isoprophyl part of styrax benzoin and the reference part of the reference styrax benzoin remove dependent on the consequences of the investigation discovered 6 mixtures that share practically speaking, in particular Benzoic corrosive, Vanillin, trans-Cinnamic corrosive, (Z) - Cinnamyl benzoate, 2-Propenoic corrosive , 3-phenyl-, phenylmethyl ester, (E) - and Cinnamyl cinnamate. Keywords: Styrax benzoin, Glycerol, Extract stability, Tween 80, Fractionation","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"112 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79721943","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

Paper making and characterization from waste coconut and tofu dregs 废椰子渣、豆腐渣造纸及特性研究

Jurnal Pendidikan Kimia Pub Date : 2021-08-01 DOI: 10.24114/jpkim.v13i2.27028

Erdiana Gultom, Hestina Hestina, Nova Florentina, Barita Aritonang

{"title":"Paper making and characterization from waste coconut and tofu dregs","authors":"Erdiana Gultom, Hestina Hestina, Nova Florentina, Barita Aritonang","doi":"10.24114/jpkim.v13i2.27028","DOIUrl":"https://doi.org/10.24114/jpkim.v13i2.27028","url":null,"abstract":"Research on paper made from coconut and tofu waste has been carried out using the alkalization method of separation technique, with the optimum composition as follows: NaOH concentration used is 3.0% and cooking temperature is 100 0C and the time required is 90 minutes. The results of the catheterization test of paper made from coconut dregs and tofu have a water content of 3.2%; pH 6.9, pulp content 65.75%; cellulose content 80.22%; lignin content 18.27%. The results of the FT-IR spectrum analysis of coconut pulp and tofu pulp are suitable for use as raw materials for making paper because they contain cellulose fibers. This is indicated by the appearance of the O-H hydroxyl group which is observed at a wavenumber of 3312 cm-1. Based on the SEM results, the surface morphology of the coconut pulp and tofu combination paper shows that the surface structure is the denser the fiber bonds, the smaller the fiber diameter, the better the mechanical properties. The results of the research conclusions explain that, paper made from coconut and tofu waste has met the requirements set by SNI 14-0444-1989. Keywords: Paper, Cellulose, Coconut pulp, Tofu pulp, Lignin","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81025146","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

Antibacterial activity test of Simargaolgaol (Aglaonema modestum Schott ex Engl) leaves extract against Escherichia coli and Salmonella typhi bacteria 菝葜叶提取物对大肠杆菌和伤寒沙门菌的抑菌活性试验

Jurnal Pendidikan Kimia Pub Date : 2021-08-01 DOI: 10.24114/jpkim.v13i2.26989

Tiurma Solomasi Zega, Putri Mandaoni Pakpahan, Rahmayani Siregar, Givinda Sitompul, S. Silaban

{"title":"Antibacterial activity test of Simargaolgaol (Aglaonema modestum Schott ex Engl) leaves extract against Escherichia coli and Salmonella typhi bacteria","authors":"Tiurma Solomasi Zega, Putri Mandaoni Pakpahan, Rahmayani Siregar, Givinda Sitompul, S. Silaban","doi":"10.24114/jpkim.v13i2.26989","DOIUrl":"https://doi.org/10.24114/jpkim.v13i2.26989","url":null,"abstract":"The Simargaolgaol (Aglaonema modestum Schott ex Engl) plant is a plant that grows wild in Barus District, Central Tapanuli, North Sumatra which is used by the community as a medicinal plant. This study aims to determine the antibacterial activity of n-hexane, ethyl acetate and ethanol extracts from Simargaolgaol leaves against Escherichia coli and Salmonella typhi bacteria. The antibacterial activity test of Simargaolgaol leaves was carried out using the disc diffusion method. The results of antibacterial activity showed that the highest inhibitory power of Simargaolgaol leaf extract was ethanol extract (polar), ethyl acetate extract (semi polar) and n-hexane extract (non polar). The inhibitory power of ethanol extract, ethyl acetate, and n-hexane against Escherichia coli bacteria was 13.1 mm (strong); 9.7 mm (medium); 8.0 mm (medium) and for Salmonella typhi bacteria respectively 11.2 mm (strong); 10.7 mm (strong) and 9.3 mm (medium). With the concentration of the extract in the diameter is 10%. Based on this, it can be concluded that Simargaolgaol leaf extract has potential as an antibacterial. Keywords: Aglaonema modestum Schott ex Engl, Antibacterial activity, Escherichia coli, Salmonella typhi","PeriodicalId":17697,"journal":{"name":"Jurnal Pendidikan Kimia","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83041184","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: 5

Improving chemical learning outcomes with explicit instruction learning models with quizizz evaluation media 基于测验评价媒介的显性教学模式改善化学学习效果

Jurnal Pendidikan Kimia Pub Date : 2021-08-01 DOI: 10.24114/jpkim.v13i2.26977

Bropson Minanlarat, L. Purba, S. F. Azzahra

引用次数: 1