The problem of misconception in Chemistry is a very serious thing. Misconceptions that occur in the students’ early learning, will become the source of misconceptions on the next material. This study will attempt to reduce or remedy such misconception through Guided Conceptual Change in the concept of electrochemistry, by paying more attention to the individuals’ learning style. Therefore, the purpose of this study is to identify the change in the students’ cognitive structure during this remediation process. The method used in this study is a mixed method which is a combination of qualitative and quantitative methods. The source of data for this study is two students selected from 90 students having high level of misconception in electrochemistry, who have balanced visualverbal capability. The change in the remediation process is identified from the verbal and writing response to the questions and the body language given by the students. Overall, this study provides an illustration that the change in the cognitive structure of students occurs through several stages. Those stages are 1. Validation of students’ misconception, 2. Creation of conflict condition, 3. Giving aid to achieve equilibrium, and 4. Reconstruction of the real concept understanding. Keywords—Remediation, Guided Conceptual Change, Learning Style, Electrochemistry
{"title":"Remediation Of Students’ Misconception Based On Their Learning Style Through Guided Conceptual Change Strategies In The Concept Of Electrochemistry","authors":"S. Sukarmin, S. Suyono, W. Wasis","doi":"10.2991/snk-19.2019.45","DOIUrl":"https://doi.org/10.2991/snk-19.2019.45","url":null,"abstract":"The problem of misconception in Chemistry is a very serious thing. Misconceptions that occur in the students’ early learning, will become the source of misconceptions on the next material. This study will attempt to reduce or remedy such misconception through Guided Conceptual Change in the concept of electrochemistry, by paying more attention to the individuals’ learning style. Therefore, the purpose of this study is to identify the change in the students’ cognitive structure during this remediation process. The method used in this study is a mixed method which is a combination of qualitative and quantitative methods. The source of data for this study is two students selected from 90 students having high level of misconception in electrochemistry, who have balanced visualverbal capability. The change in the remediation process is identified from the verbal and writing response to the questions and the body language given by the students. Overall, this study provides an illustration that the change in the cognitive structure of students occurs through several stages. Those stages are 1. Validation of students’ misconception, 2. Creation of conflict condition, 3. Giving aid to achieve equilibrium, and 4. Reconstruction of the real concept understanding. Keywords—Remediation, Guided Conceptual Change, Learning Style, Electrochemistry","PeriodicalId":256735,"journal":{"name":"Proceedings of the National Seminar on Chemistry 2019 (SNK-19)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124705761","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}
Dyeing standardization in the production of ABBS SMEs natural dye hand writing batik has been done. A series of stages of pre-treatment, dyeing and fixation have been determined to obtain the desired shades, color intensity and fastness. Optimizing the quality of dyeing is done by washing mori fiber using Turkey Red Oil (TRO) and mordanting using alum and soda ash. The dyeing is done by pre-mordanting method using natural dyes from water guava and mango leaves. To avoid loss of color, especially in the “lorod”(dyes resistrelease)stage, fixation is applied using alum, lime and iron (II) sulfate. The overall standardization in the production of natural dye batik produced by ABBS SMEs resulted in the appearance of brown to black shades with a color intensity of 73.84%-93.54% and fastness on a scale of 2-4 on dyeing using water guava leaf extracts and the appearance of dark and light brown to bluish shades with a color intensity of 79.89%-97.06% and fastness on a scale of 3-4 on dyeing using mango leaf extract. Overall, mango leaf extract produces better dyeing quality on ABBS hand writing batik products. Keywords—Batik, SMEs, ABBS, natural dye
{"title":"Quality Improvement of ABBS Hand Writing Batik Production through Standardization of Natural Dyeing using Water Guava and Mango Leaves","authors":"N. Kusumawati, Samik Samik, A. Kristyanto","doi":"10.2991/snk-19.2019.8","DOIUrl":"https://doi.org/10.2991/snk-19.2019.8","url":null,"abstract":"Dyeing standardization in the production of ABBS SMEs natural dye hand writing batik has been done. A series of stages of pre-treatment, dyeing and fixation have been determined to obtain the desired shades, color intensity and fastness. Optimizing the quality of dyeing is done by washing mori fiber using Turkey Red Oil (TRO) and mordanting using alum and soda ash. The dyeing is done by pre-mordanting method using natural dyes from water guava and mango leaves. To avoid loss of color, especially in the “lorod”(dyes resistrelease)stage, fixation is applied using alum, lime and iron (II) sulfate. The overall standardization in the production of natural dye batik produced by ABBS SMEs resulted in the appearance of brown to black shades with a color intensity of 73.84%-93.54% and fastness on a scale of 2-4 on dyeing using water guava leaf extracts and the appearance of dark and light brown to bluish shades with a color intensity of 79.89%-97.06% and fastness on a scale of 3-4 on dyeing using mango leaf extract. Overall, mango leaf extract produces better dyeing quality on ABBS hand writing batik products. Keywords—Batik, SMEs, ABBS, natural dye","PeriodicalId":256735,"journal":{"name":"Proceedings of the National Seminar on Chemistry 2019 (SNK-19)","volume":"12 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120848531","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}
S. E. Cahyaningrum, N. Herdyastuti, Amaria Amaria, Pupuh Findia
— This research aimed to study the effect of concentration calcium alginate on metformine encapsulation processes and investigated characteristic of metformine encapsulation. The encapsulation of metformine performed using chitosan and calcium alginate polymers with calcium chloride as crosslink agent. The concentrations of calcium alginate were varieties 0.5%; 1.0%; 1.5%; 2.0%; 2.5%; and 3.0% (w/v). The results showed that the highest encapsulation efficiency of metformine on concentration of alginate 2.0% (w/v) and the lowest in the alginate 0% (w/v), respectively by 80.51% and 55.94%. Encapsulation resulted with the highest the spectra FTIR analysis showed that there is vibration in 1497.91 cm -1 that indicated interaction between the carboxyl functional group of alginate and the amine functional group of chitosan
-本研究旨在研究海藻酸钙浓度对二甲双胍包封过程的影响，考察二甲双胍包封特性。以壳聚糖和海藻酸钙聚合物为包封剂，以氯化钙为交联剂对二甲双胍进行包封。海藻酸钙浓度为0.5%;1.0%;1.5%;2.0%;2.5%;3.0% (w/v)结果表明，二甲双胍在海藻酸盐浓度为2.0% (w/v)时包封率最高，在海藻酸盐浓度为0% (w/v)时包封率最低，分别为80.51%和55.94%。FTIR分析表明，在1497.91 cm -1处存在振动，表明海藻酸盐羧基官能团与壳聚糖胺官能团之间存在相互作用
{"title":"The Effect of Concentration Calcium Alginate On Metformine Encapsulated","authors":"S. E. Cahyaningrum, N. Herdyastuti, Amaria Amaria, Pupuh Findia","doi":"10.2991/snk-19.2019.20","DOIUrl":"https://doi.org/10.2991/snk-19.2019.20","url":null,"abstract":"— This research aimed to study the effect of concentration calcium alginate on metformine encapsulation processes and investigated characteristic of metformine encapsulation. The encapsulation of metformine performed using chitosan and calcium alginate polymers with calcium chloride as crosslink agent. The concentrations of calcium alginate were varieties 0.5%; 1.0%; 1.5%; 2.0%; 2.5%; and 3.0% (w/v). The results showed that the highest encapsulation efficiency of metformine on concentration of alginate 2.0% (w/v) and the lowest in the alginate 0% (w/v), respectively by 80.51% and 55.94%. Encapsulation resulted with the highest the spectra FTIR analysis showed that there is vibration in 1497.91 cm -1 that indicated interaction between the carboxyl functional group of alginate and the amine functional group of chitosan","PeriodicalId":256735,"journal":{"name":"Proceedings of the National Seminar on Chemistry 2019 (SNK-19)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123702624","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}
The research was conducted on May to July 2019, in Pamekasan, Madura, East Java, Indonesia. The aim of this study is to know the nutritional content of Solen sp. (Lorjuk) the shellfish which live and consumed by local community in Madura. This is a descriptive quantitative research. Parameters that used in determining the nutritional quality of the shellfish were water content, ash content, protein, fat and carbohydrates using gravimetry methods. The results of laboratory analysis showed that the ash content and carbohydrates were he highest nutritional content of lorjuk/ razor clams (Solen sp.). Nutritional content of Solen sp. (Lorjuk) were ater content of 0.69%; ash content of 25.40%; protein of 2.63%; fat of 1.06% and carbohydrates of 70.22%. Based on morphometric analysis, the results obtained, length, width, thickness and intact weight of Solen sp. that breed in Pamekasan Madura were 0.56 cm; 0.79 cm; 0.74 cm; and 2.19 gram. Keywords—Solen sp., morfometric, nutritional content
{"title":"Morphometric and Nutrient Content of Endemic Solen sp. (Lorjuk) of Pamekasan Madura","authors":"M. A. Anggarani, E. R. Purnama","doi":"10.2991/snk-19.2019.6","DOIUrl":"https://doi.org/10.2991/snk-19.2019.6","url":null,"abstract":"The research was conducted on May to July 2019, in Pamekasan, Madura, East Java, Indonesia. The aim of this study is to know the nutritional content of Solen sp. (Lorjuk) the shellfish which live and consumed by local community in Madura. This is a descriptive quantitative research. Parameters that used in determining the nutritional quality of the shellfish were water content, ash content, protein, fat and carbohydrates using gravimetry methods. The results of laboratory analysis showed that the ash content and carbohydrates were he highest nutritional content of lorjuk/ razor clams (Solen sp.). Nutritional content of Solen sp. (Lorjuk) were ater content of 0.69%; ash content of 25.40%; protein of 2.63%; fat of 1.06% and carbohydrates of 70.22%. Based on morphometric analysis, the results obtained, length, width, thickness and intact weight of Solen sp. that breed in Pamekasan Madura were 0.56 cm; 0.79 cm; 0.74 cm; and 2.19 gram. Keywords—Solen sp., morfometric, nutritional content","PeriodicalId":256735,"journal":{"name":"Proceedings of the National Seminar on Chemistry 2019 (SNK-19)","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125646142","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}
Technologies at the industrial revolution 4.0 (also referred to as Industry 4.0) which has grown exponentially and progressed at rapid pace largerly take impact on many of other fields covering manufacturing, economy, health care, and education. Therefore, Indonesia entails proper preparations to stay competitive among other nations. As a consequence, challenges that must be faced by human resources are more complex and unpredictable. Education has a crucial role to play in improving the human resources competencies. Chemistry learning as the part of education in a whole gives contribution to students with global competence, known as 21st century skills, to compete strictly. However, growing students’ global competence put a lot of effort for educators. One of the key strategies that can be applied in learning process to support students’ global competence is STEM education. Chemistry learning based on STEM education can improve skills to identify problems until make its solution. These skills finally can prepare students for a productive life to be able create and develop better innovation mainly in chemistry field. Keywords—21st century skills, chemistry learning, industrial revolution 4.0., STEM
{"title":"The Role of Chemistry and its Learning to Improve 21st Century Skills in Revolutional Industry 4.0 Era","authors":"S. Suyanta","doi":"10.2991/snk-19.2019.46","DOIUrl":"https://doi.org/10.2991/snk-19.2019.46","url":null,"abstract":"Technologies at the industrial revolution 4.0 (also referred to as Industry 4.0) which has grown exponentially and progressed at rapid pace largerly take impact on many of other fields covering manufacturing, economy, health care, and education. Therefore, Indonesia entails proper preparations to stay competitive among other nations. As a consequence, challenges that must be faced by human resources are more complex and unpredictable. Education has a crucial role to play in improving the human resources competencies. Chemistry learning as the part of education in a whole gives contribution to students with global competence, known as 21st century skills, to compete strictly. However, growing students’ global competence put a lot of effort for educators. One of the key strategies that can be applied in learning process to support students’ global competence is STEM education. Chemistry learning based on STEM education can improve skills to identify problems until make its solution. These skills finally can prepare students for a productive life to be able create and develop better innovation mainly in chemistry field. Keywords—21st century skills, chemistry learning, industrial revolution 4.0., STEM","PeriodicalId":256735,"journal":{"name":"Proceedings of the National Seminar on Chemistry 2019 (SNK-19)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132754283","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}
S. Poedjiastoeti, Wagino Wagino, Dian Avina Turja Soffa
This paper aims to describe results of inventory school literacy movement (SLM), scientific literacy, and science matter in school for dissabilities especially hearing impairment students. This results used to design science multimedia was appropriate with hearing impairment students, especially for elementary school for dissabilities. The design used to basic of developing and producing, so can provided utilities that needed for scientific literacy activity as supporting SLM. The inventory data obtained through direct observation and assessment sheets of SLM, science literacy, and science matter, and then analyzed descriptively. Based on the inventory results there are components has not been maximized, so it needs active roles from various parties to completed the utilities in scientific literacy activity in school for dissabilities hearing impairment.
{"title":"School Literacy Movement, Scientific Literacy, and Science Matter Inventory for Hearing Impaired Students","authors":"S. Poedjiastoeti, Wagino Wagino, Dian Avina Turja Soffa","doi":"10.2991/snk-19.2019.44","DOIUrl":"https://doi.org/10.2991/snk-19.2019.44","url":null,"abstract":"This paper aims to describe results of inventory school literacy movement (SLM), scientific literacy, and science matter in school for dissabilities especially hearing impairment students. This results used to design science multimedia was appropriate with hearing impairment students, especially for elementary school for dissabilities. The design used to basic of developing and producing, so can provided utilities that needed for scientific literacy activity as supporting SLM. The inventory data obtained through direct observation and assessment sheets of SLM, science literacy, and science matter, and then analyzed descriptively. Based on the inventory results there are components has not been maximized, so it needs active roles from various parties to completed the utilities in scientific literacy activity in school for dissabilities hearing impairment.","PeriodicalId":256735,"journal":{"name":"Proceedings of the National Seminar on Chemistry 2019 (SNK-19)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114308716","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}
-This study aims to determine the role of concept map learning in studying organic chemical especially the matter of isomer. The subjects of this study were 58 chemistry education students with details of 24 PKU 16 students and 34 PKA16 students. Data acquisition was done by initial test, final test, and retention test, student response questionnaire and interview. Data analysis used descriptive and inferential analysis (t-test) using SPSS version 16. The results of the study were: (a) based on the gain score test () higher order thinking skills (analyzing, evaluating, and synthesizing) PKU16 and PKA16 students increased with moderate and high categories; (b) have retention in higher order thinking skills; (c) excellent collaborative work, discussion and motivation; and (d) facilitate educational students in compiling of teaching material.
-本研究旨在确定概念图学习在有机化学特别是同分异构体研究中的作用。本研究以58名化学教育专业学生为研究对象，其中24名PKU 16学生和34名PKA16学生。数据采集采用初始测试、期末测试、记忆测试、学生回答问卷和访谈。数据分析采用描述性和推断性分析(t检验)，使用SPSS version 16。结果表明:(a)高阶思维技能(分析、评价、综合)PKU16和PKA16在中、高类别学生中均有提高;(b)保持高阶思维技能;(c)出色的协作工作、讨论和积极性;(d)方便教育学生编写教材。
{"title":"Train high order thinking skills at undergraduate students chemistry through concept map based learning","authors":"Ismono Ismono, S. Poedjiastoeti, S. Suyono","doi":"10.2991/snk-19.2019.34","DOIUrl":"https://doi.org/10.2991/snk-19.2019.34","url":null,"abstract":"-This study aims to determine the role of concept map learning in studying organic chemical especially the matter of isomer. The subjects of this study were 58 chemistry education students with details of 24 PKU 16 students and 34 PKA16 students. Data acquisition was done by initial test, final test, and retention test, student response questionnaire and interview. Data analysis used descriptive and inferential analysis (t-test) using SPSS version 16. The results of the study were: (a) based on the gain score test (<g>) higher order thinking skills (analyzing, evaluating, and synthesizing) PKU16 and PKA16 students increased with moderate and high categories; (b) have retention in higher order thinking skills; (c) excellent collaborative work, discussion and motivation; and (d) facilitate educational students in compiling of teaching material.","PeriodicalId":256735,"journal":{"name":"Proceedings of the National Seminar on Chemistry 2019 (SNK-19)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129809210","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}
— A kidney is an organ that has many roles to survive. This organ can be damaged by the type 2 diabetes mellitus which is marked by high glucose in the blood. Histological studies of kidney tissue in mice ( Mus musculus L .) shown by type 2 pre-Diabetes Mellitus with variations in yeast treatment have been carried out. This study uses variations in the treatment of yeast planted in red rice (red yeast) and yeast extract produced by enzymatic hydrolysis (YHE-red rice) as a comparison. Mice as the experimental animals were induced obesity using a high-fat and fructose diet, so they showed symptoms of Pre-DM type 2 and were then treated with red yeast rice and red YHE-rice. This study used a comparison of DM mice and treated mice with glibenclamide in CMC-Na 0.2% (positive control), DM mice and treated mice with CMC-Na 0.2% (negative control), and non-DM mice and treated mice with CMC -Na 0.2% (normal control). Observation of renal histopathology using a light microscope. Observed Parameters included cell necrosis, glomerular nephropathy performance, increasing of Bowman's space thickness, thickening of the distal and proximal tubules, thickening of the renal arteries, and leukocyte infiltmiceion. The results showed that the kidneys of type-2 DM mice and Yeast-Red Rice and Yeast Extract-Red Rice as well as mice that indicated DM and were treated with glibenclamide in 0.2% CMC-Na for 1 week, did not show histological differences. Kidney when compared with non-DM mice and treated with 0.2% CMC-Na (normal control), as well as mice that were indicated by DM and treated with 0.2 CMC-Na. So to find out the effect of yeast treatment on the kidney of mice indicated by type -2 DM, it is necessary to induce obesity and treat yeast-red rice or YHE-red rice for longer periods.
{"title":"Histopathology of Kidney In Mice (Mus musculus L) Indicated By Pre-Diabetes Mellitus Type 2 (Pre-Type 2 DM) With a variation of Yeast Treatment","authors":"R. Agustini, E. R. Purnama, A. Widodo","doi":"10.2991/snk-19.2019.17","DOIUrl":"https://doi.org/10.2991/snk-19.2019.17","url":null,"abstract":"— A kidney is an organ that has many roles to survive. This organ can be damaged by the type 2 diabetes mellitus which is marked by high glucose in the blood. Histological studies of kidney tissue in mice ( Mus musculus L .) shown by type 2 pre-Diabetes Mellitus with variations in yeast treatment have been carried out. This study uses variations in the treatment of yeast planted in red rice (red yeast) and yeast extract produced by enzymatic hydrolysis (YHE-red rice) as a comparison. Mice as the experimental animals were induced obesity using a high-fat and fructose diet, so they showed symptoms of Pre-DM type 2 and were then treated with red yeast rice and red YHE-rice. This study used a comparison of DM mice and treated mice with glibenclamide in CMC-Na 0.2% (positive control), DM mice and treated mice with CMC-Na 0.2% (negative control), and non-DM mice and treated mice with CMC -Na 0.2% (normal control). Observation of renal histopathology using a light microscope. Observed Parameters included cell necrosis, glomerular nephropathy performance, increasing of Bowman's space thickness, thickening of the distal and proximal tubules, thickening of the renal arteries, and leukocyte infiltmiceion. The results showed that the kidneys of type-2 DM mice and Yeast-Red Rice and Yeast Extract-Red Rice as well as mice that indicated DM and were treated with glibenclamide in 0.2% CMC-Na for 1 week, did not show histological differences. Kidney when compared with non-DM mice and treated with 0.2% CMC-Na (normal control), as well as mice that were indicated by DM and treated with 0.2 CMC-Na. So to find out the effect of yeast treatment on the kidney of mice indicated by type -2 DM, it is necessary to induce obesity and treat yeast-red rice or YHE-red rice for longer periods.","PeriodicalId":256735,"journal":{"name":"Proceedings of the National Seminar on Chemistry 2019 (SNK-19)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127857749","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}
The working electrode in the voltammetry method is an electrode that responds to the current generated in a redox reaction. The working Electrode to response currents through the process of migration, convection and diffusion. Working electrodes can be made according to the needs for qualitative and quantitative analysis. Graphen oxide as working electrodes have been made, as phenol sensor samples, graphen oxide has been made by hammer methods. Graphen oxide working electrodes are characterized using IR, XRD, SEM. The copper wire cable as electrode body is made a 15 cm long 2mm diameter filled with 0.001mg graphen oxide which is then compacted until smooth. Graphene oxide electrodes have been used for the measurement of phenol by voltammetry compared to HPLC. Measurements applied to the concentration of 10 ppm phenol samples obtained by voltammetry recovery were obtained 97.4% and HPLC obtained 97.6%. Keywords—voltammetry, graphen oxide, phenol
{"title":"Production Of Working Electrodes Graphene Oxide For Phenol Analysis Voltammetrically","authors":"P. Setiarso","doi":"10.2991/snk-19.2019.13","DOIUrl":"https://doi.org/10.2991/snk-19.2019.13","url":null,"abstract":"The working electrode in the voltammetry method is an electrode that responds to the current generated in a redox reaction. The working Electrode to response currents through the process of migration, convection and diffusion. Working electrodes can be made according to the needs for qualitative and quantitative analysis. Graphen oxide as working electrodes have been made, as phenol sensor samples, graphen oxide has been made by hammer methods. Graphen oxide working electrodes are characterized using IR, XRD, SEM. The copper wire cable as electrode body is made a 15 cm long 2mm diameter filled with 0.001mg graphen oxide which is then compacted until smooth. Graphene oxide electrodes have been used for the measurement of phenol by voltammetry compared to HPLC. Measurements applied to the concentration of 10 ppm phenol samples obtained by voltammetry recovery were obtained 97.4% and HPLC obtained 97.6%. Keywords—voltammetry, graphen oxide, phenol","PeriodicalId":256735,"journal":{"name":"Proceedings of the National Seminar on Chemistry 2019 (SNK-19)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125432475","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}
This study aims to determine the enhancement mastery of students' concepts after being given learning based on the Science Technology Society (STS) approach to Chemical Equilibrium. Students in class XI MIA 1 and XI MIA 2 of Senior High School 4 Sidoarjo be a subject. The design of this study uses an adaptation of the 4-D model by Thiagarajan, et al. The data is obtained from concept mastery tests given before and after learning activities. The data is analyzed qualitative and quantitative descriptive, and inferential statistics. The results of the t-test indicate the value of sig. (2-tailed) <0.05 so that there are difference in the mastery of students' concepts before and after being given learning based on the Science Technology Society (STS) approach. Keywords—Science Technology Society Approach, Chemical Equilibrium, Mastery of Students’ Concept
{"title":"Enhacing Mastery Of Students’ Concept Through Science Technology Society (STS) Approach On Chemical Equilibrium","authors":"Dwi Rahmi Putri, L. Yuanita, B. Sugiarto","doi":"10.2991/snk-19.2019.29","DOIUrl":"https://doi.org/10.2991/snk-19.2019.29","url":null,"abstract":"This study aims to determine the enhancement mastery of students' concepts after being given learning based on the Science Technology Society (STS) approach to Chemical Equilibrium. Students in class XI MIA 1 and XI MIA 2 of Senior High School 4 Sidoarjo be a subject. The design of this study uses an adaptation of the 4-D model by Thiagarajan, et al. The data is obtained from concept mastery tests given before and after learning activities. The data is analyzed qualitative and quantitative descriptive, and inferential statistics. The results of the t-test indicate the value of sig. (2-tailed) <0.05 so that there are difference in the mastery of students' concepts before and after being given learning based on the Science Technology Society (STS) approach. Keywords—Science Technology Society Approach, Chemical Equilibrium, Mastery of Students’ Concept","PeriodicalId":256735,"journal":{"name":"Proceedings of the National Seminar on Chemistry 2019 (SNK-19)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123586358","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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