Pub Date : 2018-12-12DOI: 10.37134/EJSMT.VOL5.2.6.2018
C. Keong, Farah Alia Nordin, A. Bhatt, C. Keng
Plant tissue culture technology offers the potential of producing medicinally important secondary metabolites such as anti-malarial artemisinin from Artemisia annua. In this study, callus induction of three different varieties of A.annua, namely T1, T2 and Hi varieties was carried out using leaf explants on Murashige & Skoog (MS) and Litvay (LV) media with three different supplementations. MS medium added with 0.5 mg/L BA, 0.5 mg/L NAA and 0.5 g/L of casein hydrolysate (CH) induced the highest yield of callus biomass compared to the effect of picloram- or 2,4-enriched MS medium. T2 variety was found to be the highest yielding variety in this medium. Picloram-enriched MS medium induced better callus in term of callus biomass and friability than 2,4-enriched medium. Hi variety induced in MS medium added with 0.5 mg/L picloram produced highest callus biomass among the three varieties. Callus formed on 0.5 mg/L picloram was also much more easily dispersed than callus of all three varieties cultured in the other two MS medium. LV-based medium was generally shown to be poor in inducing callogenic response from leaf explants. Therefore Hi callus sourced from MS medium supplemented with 0.5 mg/L picloram was selected to initiate liquid cell culture of A. annua which can further be explored for production of artemisinin, an anti-malarial compound. Abbreviations: MS – Murashige and Skoog’s salts and vitamins [1]; LV – Litvay medium [2]; BA – 6- benzyladenine; NAA – alpha-napthaleneacetic acid; 2,4-D – 2,4-dichlorophenoxyacetic acid; picloram – 4-amino-3,5,6-trichloropicolinic acid, CH – casein hydrolysate
{"title":"Culture Medium and Varietal Selection for Establishment of Callus Culture of Artemisia annua","authors":"C. Keong, Farah Alia Nordin, A. Bhatt, C. Keng","doi":"10.37134/EJSMT.VOL5.2.6.2018","DOIUrl":"https://doi.org/10.37134/EJSMT.VOL5.2.6.2018","url":null,"abstract":"Plant tissue culture technology offers the potential of producing medicinally important secondary metabolites such as anti-malarial artemisinin from Artemisia annua. In this study, callus induction of three different varieties of A.annua, namely T1, T2 and Hi varieties was carried out using leaf explants on Murashige & Skoog (MS) and Litvay (LV) media with three different supplementations. MS medium added with 0.5 mg/L BA, 0.5 mg/L NAA and 0.5 g/L of casein hydrolysate (CH) induced the highest yield of callus biomass compared to the effect of picloram- or 2,4-enriched MS medium. T2 variety was found to be the highest yielding variety in this medium. Picloram-enriched MS medium induced better callus in term of callus biomass and friability than 2,4-enriched medium. Hi variety induced in MS medium added with 0.5 mg/L picloram produced highest callus biomass among the three varieties. Callus formed on 0.5 mg/L picloram was also much more easily dispersed than callus of all three varieties cultured in the other two MS medium. LV-based medium was generally shown to be poor in inducing callogenic response from leaf explants. Therefore Hi callus sourced from MS medium supplemented with 0.5 mg/L picloram was selected to initiate liquid cell culture of A. annua which can further be explored for production of artemisinin, an anti-malarial compound. \u0000Abbreviations: MS – Murashige and Skoog’s salts and vitamins [1]; LV – Litvay medium [2]; BA – 6- benzyladenine; NAA – alpha-napthaleneacetic acid; 2,4-D – 2,4-dichlorophenoxyacetic acid; picloram – 4-amino-3,5,6-trichloropicolinic acid, CH – casein hydrolysate","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76746291","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 : 2018-12-05DOI: 10.37134/EJSMT.VOL5.2.5.2018
L. S. Yee, Y. Manap
The purpose of the study was to investigate attitude towards science among lower secondary students in Johor Bahru. The attitude in this study included interest, perception towards science and motivation. The study was carried out in Johor Bahru, Johor. The study adopted quantitative descriptive research designs and questionnaires were used in the study. A total of 370 respondents constituted the sample of the study, which included Form 2 lower secondary students from Johor Bahru. Data was analysed to obtain frequency, mean and standard deviation. The results revealed that laboratory activity, curiosity to discovery science and science as a tool to understand the world is able to improve science learning. As a conclusion, interest especially created by laboratory activity, perception of student when they are curios to discovery science and motivation factor when students know that science as a tool to understand the world are able to improve students science learning in lower secondary schools in Johor Bahru. The implication was that school teachers could prepare more laboratory activities in science lesson. They also can stimulate students’ curiosity to discovery science and related science knowledge to the world so that students are interested and motivated to learn science. Future studies on this subject would be beneficial to understand more deeply the relationship between student personal factors with science achievement.
{"title":"Attitude Towards Science Among Lower Secondary Students in Johor Bahru","authors":"L. S. Yee, Y. Manap","doi":"10.37134/EJSMT.VOL5.2.5.2018","DOIUrl":"https://doi.org/10.37134/EJSMT.VOL5.2.5.2018","url":null,"abstract":"The purpose of the study was to investigate attitude towards science among lower secondary students in Johor Bahru. The attitude in this study included interest, perception towards science and motivation. The study was carried out in Johor Bahru, Johor. The study adopted quantitative descriptive research designs and questionnaires were used in the study. A total of 370 respondents constituted the sample of the study, which included Form 2 lower secondary students from Johor Bahru. Data was analysed to obtain frequency, mean and standard deviation. The results revealed that laboratory activity, curiosity to discovery science and science as a tool to understand the world is able to improve science learning. As a conclusion, interest especially created by laboratory activity, perception of student when they are curios to discovery science and motivation factor when students know that science as a tool to understand the world are able to improve students science learning in lower secondary schools in Johor Bahru. The implication was that school teachers could prepare more laboratory activities in science lesson. They also can stimulate students’ curiosity to discovery science and related science knowledge to the world so that students are interested and motivated to learn science. Future studies on this subject would be beneficial to understand more deeply the relationship between student personal factors with science achievement.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91427850","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 : 2018-12-04DOI: 10.37134/EJSMT.VOL5.2.3.2018
Rabiaa Abu Azoum Ali, A. Mohamed
Multiwall carbon nanotubes (MWCNTs) ability to improve electrical, optical and mechanical properties of nanocomposites, have attracted great amount of interest for their huge potential in applying them as filler in polymer matrix. However, this application was hindered because of their low dispersion in polymer matrix and tendency to self-associate into macro-scale aggregates. Recently, diffusion of MWCNTs in cellulose polymer matrix was studied and prepared via latex technology approaches by the addition of 1-butyl-3-methyl-imidazolium (BMIM)-surfactant. The performance of BMIM-surfactants for dispersing MWCNTs in polymer was characterized using a range of techniques including field emission scanning electron microscopy (FESEM), and Thermogravimetric analysis (TGA). Meanwhile, the conductivities of the nanocomposites were also investigated using four-point probe measurements. In this study, MWCNTs were efficiently dispersed in cellulose utilizing 1-butyl-3-methyl imidazolium-dodecyl benzene sulfonate (BMIM-DBS). Interestingly, it was found that BMIM-DBS performs much better than that of the commercially available surfactant sodium dodecyl benzenesulfonate (SDBS), demonstrating the importance of the effect of surfactant counter-ion leading to improved dispersion of MWCNTs in cellulose. This finding will significantly contribute towards the improvement of properties of cellulose for nanocomposite industries.
{"title":"Preparation of Multiwall Carbon Nanotubes/Cellulose Nanocomposites Stabilized By 1-Butyl-3-Methyl-Imidazolium (BMIM) - Surfactants","authors":"Rabiaa Abu Azoum Ali, A. Mohamed","doi":"10.37134/EJSMT.VOL5.2.3.2018","DOIUrl":"https://doi.org/10.37134/EJSMT.VOL5.2.3.2018","url":null,"abstract":"Multiwall carbon nanotubes (MWCNTs) ability to improve electrical, optical and mechanical properties of nanocomposites, have attracted great amount of interest for their huge potential in applying them as filler in polymer matrix. However, this application was hindered because of their low dispersion in polymer matrix and tendency to self-associate into macro-scale aggregates. Recently, diffusion of MWCNTs in cellulose polymer matrix was studied and prepared via latex technology approaches by the addition of 1-butyl-3-methyl-imidazolium (BMIM)-surfactant. The performance of BMIM-surfactants for dispersing MWCNTs in polymer was characterized using a range of techniques including field emission scanning electron microscopy (FESEM), and Thermogravimetric analysis (TGA). Meanwhile, the conductivities of the nanocomposites were also investigated using four-point probe measurements. In this study, MWCNTs were efficiently dispersed in cellulose utilizing 1-butyl-3-methyl imidazolium-dodecyl benzene sulfonate (BMIM-DBS). Interestingly, it was found that BMIM-DBS performs much better than that of the commercially available surfactant sodium dodecyl benzenesulfonate (SDBS), demonstrating the importance of the effect of surfactant counter-ion leading to improved dispersion of MWCNTs in cellulose. This finding will significantly contribute towards the improvement of properties of cellulose for nanocomposite industries.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76704419","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 : 2018-12-04DOI: 10.37134/EJSMT.VOL5.2.4.2018
B. Astuti, Sugianto, S. N. Mahmudah, P. Marwoto, Didik Ariyanto, E. Wibowo
Al doped ZnO (ZnO:Al) thin films was grown on corning glass substrate using dc magnetron sputtering. ZnO:Al thin film grown with plasma power 40 watt and 500 mTorr argon pressure for 120 minutes. Film was grown annealed on oxygen atmosphere with different pressure for 20 minutes. The crystalline of ZnO:Al film deposited has an hexagonal structure. The crystallites preferred orientation shift gradually from (002) to (101) direction as the pressure of oxygen increases. Transmittance in the visible regions increases with increasing pressure of oxygen about 81,27%. The optical characterization indicated that the band gap shift toward lower energies with increasing pressure of oxygen.
{"title":"Oxygen Effect in Annealing Process of Aluminium Doped Zinc Oxide Films","authors":"B. Astuti, Sugianto, S. N. Mahmudah, P. Marwoto, Didik Ariyanto, E. Wibowo","doi":"10.37134/EJSMT.VOL5.2.4.2018","DOIUrl":"https://doi.org/10.37134/EJSMT.VOL5.2.4.2018","url":null,"abstract":"Al doped ZnO (ZnO:Al) thin films was grown on corning glass substrate using dc magnetron sputtering. ZnO:Al thin film grown with plasma power 40 watt and 500 mTorr argon pressure for 120 minutes. Film was grown annealed on oxygen atmosphere with different pressure for 20 minutes. The crystalline of ZnO:Al film deposited has an hexagonal structure. The crystallites preferred orientation shift gradually from (002) to (101) direction as the pressure of oxygen increases. Transmittance in the visible regions increases with increasing pressure of oxygen about 81,27%. The optical characterization indicated that the band gap shift toward lower energies with increasing pressure of oxygen.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84799425","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 : 2018-12-03DOI: 10.37134/EJSMT.VOL5.2.2.2018
H. Hashim, Mohd Norawi Ali, M. Samsudin
Habits of mind (HOM) is one of the kind response to those questions and problems whereby the answers to which are not immediately known which can attribute to effective problem solvers and critical thinking development. However, the emphasis on this aspect is still low especially among science educators as well as secondary science students which in the long run will retard the production of knowledge worker who are able to behave when confronted with life’s problems. The study addressed the integration of Thinking Based Learning (TBL) and the 6E Instructional Model as a teaching approach in nurturing habits of mind among secondary students while doing their Science, Technology, Engineering and Mathematics (STEM) project. The study involved 30 students from a Lower Secondary School in a sub urban school in Kota Bharu, Kelantan. Students were given a STEM Raft Module integrating TBL and 6E Instructional Model for five weeks to come out with a model of a raft based on science concepts using material available in their community. Data of the study were captured from students’ documentation analysis, classroom observation using camera and video cam recording, and interview. The findings showed that TBL and 6E Instructional Model can nurture habits of mind among secondary students while doing their STEM project. Seven characteristics of habits of mind have been identified; (1) questioning and problem solving, (2) listening with understanding and empathy, (3) thinking about your thinking, (4) thinking flexibility, (5) applying past knowledge to novel situations, (6) creating, imagining and innovating and (7) thinking independently. Keywords: Habits of mind, Thinking Based Learning, the 6E Instructional Model, STEM project
{"title":"Nurturing Habits of Mind (HOM) Through Thinking Based Learning (TBL) in Doing Science Technology, Engineering and Mathematics (STEM) Project","authors":"H. Hashim, Mohd Norawi Ali, M. Samsudin","doi":"10.37134/EJSMT.VOL5.2.2.2018","DOIUrl":"https://doi.org/10.37134/EJSMT.VOL5.2.2.2018","url":null,"abstract":"Habits of mind (HOM) is one of the kind response to those questions and problems whereby the answers to which are not immediately known which can attribute to effective problem solvers and critical thinking development. However, the emphasis on this aspect is still low especially among science educators as well as secondary science students which in the long run will retard the production of knowledge worker who are able to behave when confronted with life’s problems. The study addressed the integration of Thinking Based Learning (TBL) and the 6E Instructional Model as a teaching approach in nurturing habits of mind among secondary students while doing their Science, Technology, Engineering and Mathematics (STEM) project. The study involved 30 students from a Lower Secondary School in a sub urban school in Kota Bharu, Kelantan. Students were given a STEM Raft Module integrating TBL and 6E Instructional Model for five weeks to come out with a model of a raft based on science concepts using material available in their community. Data of the study were captured from students’ documentation analysis, classroom observation using camera and video cam recording, and interview. The findings showed that TBL and 6E Instructional Model can nurture habits of mind among secondary students while doing their STEM project. Seven characteristics of habits of mind have been identified; (1) questioning and problem solving, (2) listening with understanding and empathy, (3) thinking about your thinking, (4) thinking flexibility, (5) applying past knowledge to novel situations, (6) creating, imagining and innovating and (7) thinking independently. \u0000 Keywords: Habits of mind, Thinking Based Learning, the 6E Instructional Model, STEM project","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84682059","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 : 2018-12-03DOI: 10.37134/EJSMT.VOL5.2.1.2018
Zulfah, Eka Statistika, Eti Sukriani
The innovation in this instruction was the use of medicine card as a learning media of periodic table of elements. This research aimed to know the process of learning conducted by using medicine card and to know the students' motivation and learning outcomes as the result of the implementation of medicine card in the classroom activity. This research used a quantitative descriptive method. The implementation of the media was conducted in four-fold meetings in Health Vocational School of Sadewa, Yogyakarta, Indonesia. A SWOT analysis was conducted at the beginning of the learning innovation and was followed by the observation and the preparation of material and media. The class activity began with explanations of medicine card games, group divisions, game execution, and confirmation. The final step was evaluated using a questionnaire of motivation and post-test problems. The result of the questionnaire indicated that the students’ motivation was in the good criterion and the learning outcomes of students showed that they had an enough criterion.
{"title":"Medicine Card as Innovation Learning in Periodic Table of Elements for Pharmaceutical Vocational Students","authors":"Zulfah, Eka Statistika, Eti Sukriani","doi":"10.37134/EJSMT.VOL5.2.1.2018","DOIUrl":"https://doi.org/10.37134/EJSMT.VOL5.2.1.2018","url":null,"abstract":"The innovation in this instruction was the use of medicine card as a learning media of periodic table of elements. This research aimed to know the process of learning conducted by using medicine card and to know the students' motivation and learning outcomes as the result of the implementation of medicine card in the classroom activity. This research used a quantitative descriptive method. The implementation of the media was conducted in four-fold meetings in Health Vocational School of Sadewa, Yogyakarta, Indonesia. A SWOT analysis was conducted at the beginning of the learning innovation and was followed by the observation and the preparation of material and media. The class activity began with explanations of medicine card games, group divisions, game execution, and confirmation. The final step was evaluated using a questionnaire of motivation and post-test problems. The result of the questionnaire indicated that the students’ motivation was in the good criterion and the learning outcomes of students showed that they had an enough criterion.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78196551","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 : 2018-06-11DOI: 10.37134/ejsmt.vol5.1.6.2018
Z. Abdullah, N. A. Ali, M. Jamil, N. Mat, A. Ali, N. Awang, Wan Ainor Syahdah Wan Hassan, L. S. Kiong, Mohd Hafidz Abdullah, Norfaizura Azmi
Ficus deltoidea Jack or locally known as mas cotek from the family of Moraceae has been acknowledged for its occurrence of several varieties based on the variations of leaf morphology, namely F. deltoidea var. angustifolia (Miq.) Corner, F. deltoidea var. bilobata Corner, F. deltoidea var. kunstleri (King) Corner, F. deltoidea var. lutescens (Desf.) Corner, F. deltoidea var. trengganuensis Corner, F. deltoidea var. motleyana and F. deltoidea var. deltoidea Jack. In this work, we report on the chemical profiles using chromatographic techniques on the seven varieties of F. deltoidea by analysing the presence of the bioactive compounds, vitexin and isovitexin and characterising the other major peaks in the chromatograms. Observation on the HPLC chromatogram showed the presence of both compounds in all samples except FDv. K (vitexin only) and FDv. I. Other peaks showed a characteristic of flavonoids based on the UV spectra pattern with UV maxima at 270 and 338 nm except for peaks 6, 7 and 8 with UV maxima at 294, 319 and 210, respectively. Both reference compounds were presence in varies concentration in all samples analysed.
来自桑科(Moraceae)的Ficus deltoidea Jack或在当地被称为mas cotek，因其基于叶片形态变化的几个品种而得到认可，即F. deltoidea var. angustifolia (Miq.)。角，F. deltoidea var. bilobata角，F. deltoidea var. kunstleri (King)角，F. deltoidea var. lutescens (Desf.)角、角、角、角、角、角、角、角、角、角、角本文利用色谱分析技术，分析了7个品种的牡荆素和异牡荆素的活性成分，并对其主要峰进行了表征。HPLC分析结果表明，除FDv外，其余样品均存在这两种化合物。K(仅限牡荆素)和FDv。1 .除峰6、峰7和峰8分别在294、319和210 nm处出现紫外峰值外，其余峰均在270和338 nm处表现出黄酮类化合物的特征。两种标准化合物在所有分析样品中均以不同浓度存在。
{"title":"Chromatographic Fingerprint analysis for Determining the Presence of Vitexin and Isovitexin on Seven Varieties of Ficus Deltoidea","authors":"Z. Abdullah, N. A. Ali, M. Jamil, N. Mat, A. Ali, N. Awang, Wan Ainor Syahdah Wan Hassan, L. S. Kiong, Mohd Hafidz Abdullah, Norfaizura Azmi","doi":"10.37134/ejsmt.vol5.1.6.2018","DOIUrl":"https://doi.org/10.37134/ejsmt.vol5.1.6.2018","url":null,"abstract":"Ficus deltoidea Jack or locally known as mas cotek from the family of Moraceae has been acknowledged for its occurrence of several varieties based on the variations of leaf morphology, namely F. deltoidea var. angustifolia (Miq.) Corner, F. deltoidea var. bilobata Corner, F. deltoidea var. kunstleri (King) Corner, F. deltoidea var. lutescens (Desf.) Corner, F. deltoidea var. trengganuensis Corner, F. deltoidea var. motleyana and F. deltoidea var. deltoidea Jack. In this work, we report on the chemical profiles using chromatographic techniques on the seven varieties of F. deltoidea by analysing the presence of the bioactive compounds, vitexin and isovitexin and characterising the other major peaks in the chromatograms. Observation on the HPLC chromatogram showed the presence of both compounds in all samples except FDv. K (vitexin only) and FDv. I. Other peaks showed a characteristic of flavonoids based on the UV spectra pattern with UV maxima at 270 and 338 nm except for peaks 6, 7 and 8 with UV maxima at 294, 319 and 210, respectively. Both reference compounds were presence in varies concentration in all samples analysed.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88124047","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 : 2018-06-08DOI: 10.37134/ejsmt.vol5.1.5.2018
S. Azhar
River pollution impact human health, environment and the sustainable development. This study was conducted to identify spatial patterns and the main parameters affecting the water pollution within nine monitoring stations in the Muda River basin (Malaysia) over a 16-year database (1998–2013). Environmetric techniques were applied to the dataset. These combined Cluster Analysis, Discriminant Analysis, and Multiple Linear Regression. The Cluster Analysis showed that the monitoring stations divided into two separate groups based on similarities features of water quality while Discriminant Analysis validated these groups. Furthermore, the Multiple Linear Regression analysis showed that the significant parameters contributing to variability the Water Quality Index was biological oxygen demand, chemical oxygen demand and ammonia nitrogen. This was due to the point-source pollution, particularly from rubber factory. Therefore, the results provided information to support future water pollution control strategies.
{"title":"Spatial Assessment of Water Quality Patterns using Environmetric Techniques: A Case Study in Muda River Basin (Malaysia)","authors":"S. Azhar","doi":"10.37134/ejsmt.vol5.1.5.2018","DOIUrl":"https://doi.org/10.37134/ejsmt.vol5.1.5.2018","url":null,"abstract":"River pollution impact human health, environment and the sustainable development. This study was conducted to identify spatial patterns and the main parameters affecting the water pollution within nine monitoring stations in the Muda River basin (Malaysia) over a 16-year database (1998–2013). Environmetric techniques were applied to the dataset. These combined Cluster Analysis, Discriminant Analysis, and Multiple Linear Regression. The Cluster Analysis showed that the monitoring stations divided into two separate groups based on similarities features of water quality while Discriminant Analysis validated these groups. Furthermore, the Multiple Linear Regression analysis showed that the significant parameters contributing to variability the Water Quality Index was biological oxygen demand, chemical oxygen demand and ammonia nitrogen. This was due to the point-source pollution, particularly from rubber factory. Therefore, the results provided information to support future water pollution control strategies.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90802994","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 : 2018-06-08DOI: 10.37134/ejsmt.vol5.1.4.2018
M. K. Nais, E. D. Siswani
This research was conducted to develop the multimedia of colloidal systems as an enrichment media for vocational high school students in chemistry class and to know the quality of the multimedia. This was a research and development study. Developmental procedures used in this research were adopted from Borg and Gall development procedures consisting of six phases including: collecting information, planning, developing the preliminary form of the product, validating and revising the product, assessing the product, and revising final product. The products were validated by one content expert and one media expert and reviewed by three peer reviewers. The advises from the experts and the peer reviewers were used to improve the initial product. The assessment of the product was carried out by five reviewers based on six aspects of the criteria, included: content feasibility, language, visual-display of media, audio-display of media, media programming, and expediency of the media. The product assessment data were analyzed by categorizing the score into ideal rating category. In general, the multimedia assessment score was included in the category of very good category. Analysis on each aspect shows that content feasibility, media programming, and expediency of the media aspects was included in the very good category, while language, visual-display of media, audio-display of media aspects included in the good category. These results indicatated that the products were ideal as an enrichment media of colloidal systems for vocational high school students.
{"title":"Multimedia of Chemistry Enrichment in Colloidal Systems for Vocational High School Students","authors":"M. K. Nais, E. D. Siswani","doi":"10.37134/ejsmt.vol5.1.4.2018","DOIUrl":"https://doi.org/10.37134/ejsmt.vol5.1.4.2018","url":null,"abstract":"This research was conducted to develop the multimedia of colloidal systems as an enrichment media for vocational high school students in chemistry class and to know the quality of the multimedia. This was a research and development study. Developmental procedures used in this research were adopted from Borg and Gall development procedures consisting of six phases including: collecting information, planning, developing the preliminary form of the product, validating and revising the product, assessing the product, and revising final product. The products were validated by one content expert and one media expert and reviewed by three peer reviewers. The advises from the experts and the peer reviewers were used to improve the initial product. The assessment of the product was carried out by five reviewers based on six aspects of the criteria, included: content feasibility, language, visual-display of media, audio-display of media, media programming, and expediency of the media. The product assessment data were analyzed by categorizing the score into ideal rating category. In general, the multimedia assessment score was included in the category of very good category. Analysis on each aspect shows that content feasibility, media programming, and expediency of the media aspects was included in the very good category, while language, visual-display of media, audio-display of media aspects included in the good category. These results indicatated that the products were ideal as an enrichment media of colloidal systems for vocational high school students.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80956852","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 : 2018-06-07DOI: 10.37134/ejsmt.vol5.1.3.2018
B. Y. Sawuwu, C. F. Partana, Hairida -
This research was conducted to explore how procedural knowledge of bilingual students in chemical equilibrium problem-solving skills. This research was a descriptive study of 31 bilingual private high school students. Chemical equilibrium problem solving skills were collected by three problems, while the procedural knowledge was collected by analysis of student answers, self-assessment metacognition questionnaire, and the interview with students and their chemistry teacher. Data collected was analyzed by a phenomenological reduction method. The results of students’ procedural knowledge were categorized into assumption determination (54,84%), strategy development (22,58%), chemical equation (41,94%), factors affecting the equation (61,29%), using the other knowledge (29,03%), quantitative analysis (38,71%), and alternative strategy (25,81%). According to the operator in each framework answer, the result of students’ answers of chemical equilibrium problem-solving skills was classified into phenomenological and formalism answers. In phenomenological answers, students began their framework from the chemical equation to factors affecting the equilibrium shift. In the formalism answer, the students began their framework from the information given in the problems and related it to the stoichiometry and alternative ways to find the final states (goals). In this study was also found some students’ errors in chemical language and chemical equilibrium conceptions.
{"title":"Exploration of Procedural Knowledge of Bilingual Students in Chemical Equilibrium Problem Solving","authors":"B. Y. Sawuwu, C. F. Partana, Hairida -","doi":"10.37134/ejsmt.vol5.1.3.2018","DOIUrl":"https://doi.org/10.37134/ejsmt.vol5.1.3.2018","url":null,"abstract":"This research was conducted to explore how procedural knowledge of bilingual students in chemical equilibrium problem-solving skills. This research was a descriptive study of 31 bilingual private high school students. Chemical equilibrium problem solving skills were collected by three problems, while the procedural knowledge was collected by analysis of student answers, self-assessment metacognition questionnaire, and the interview with students and their chemistry teacher. Data collected was analyzed by a phenomenological reduction method. The results of students’ procedural knowledge were categorized into assumption determination (54,84%), strategy development (22,58%), chemical equation (41,94%), factors affecting the equation (61,29%), using the other knowledge (29,03%), quantitative analysis (38,71%), and alternative strategy (25,81%). According to the operator in each framework answer, the result of students’ answers of chemical equilibrium problem-solving skills was classified into phenomenological and formalism answers. In phenomenological answers, students began their framework from the chemical equation to factors affecting the equilibrium shift. In the formalism answer, the students began their framework from the information given in the problems and related it to the stoichiometry and alternative ways to find the final states (goals). In this study was also found some students’ errors in chemical language and chemical equilibrium conceptions.","PeriodicalId":11475,"journal":{"name":"EDUCATUM Journal of Science, Mathematics and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82004445","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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