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THERMODINAMIC PARAMETERS ON THE SORPTION OF PHOSPHATE IONS BY MONTMORILLONITE Jaslin, Ikhsan; Endang, Wijayanti; Sunarto, Sunarto
Jurnal Sains Dasar Vol 4, No 1 (2015): April 2015
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (173.603 KB) | DOI: 10.21831/jsd.v4i1.8429

Abstract

The sorption of phosphate by montmorillonite at 10, 30, and 50 oC were investigated aiming to mainly determine thermodynamic parameters for the formation of surface complexes in the adsorption of phosphate ions by montmorillonite. Data were collected by adsorption edge experiments investigating the effect of pH, adsorption isotherms enabling the effect of sorbate concentration, and acid-base titration calculating protons released or taken up by adsorption process. Data analysis was carried out using surface complexation model to fit the data collected in this study using the parameters obtained from previous study, as well as to calculate the values of ΔH and ΔS. Previous study reported that phosphate ions formed two outer-sphere surface complexes with active sites of montmorillonite through hydrogen bonding. In the first complex,  [(XH)0– H2L─]─, the phosphate was held to permanent-charge X─ sites on the tetrahedral siloxane faces, and the second complex, [[(SO─)(SOH)]– – [H2L]─] 2─ was formed through the interaction between the phosphate and variable charge surface hydroxyl groups at the edges of montmorillonite crystals and on the octahedral alumina faces. The values of ΔH for the first and second reactions are 39.756 and 3.765x10-7 kJ mol‒1 respectively. Since both reactions have positive enthalpy values, it can be concluded that the reactions are endothermic. Large energy for the first reaction is needed by X─  sites (permanent negatively charge sites of montmorillonite) to be partially desolvated, on which K+ or other surface cations are replaced by H+ ions in the surface protonated process, and are then ready to interact phosphate ions in the solution. Small values of ΔH for the second reactions indicates that hydrogen bonds formed by phosphate and SOH sites in the second reaction are easily broken out, and the phosphate can easily desorbed from the surface. The values of ΔS for the first and second reactions are 122.523 and 2.393 x10-2  J K‒1 mol‒1, which are greater than -10 kJ mol‒1 and indicates that the surface reactions occurs through dissociative mechanisms.Keywords:   montmorillonite, adsorption edge, extended constant capacitance, surface complexation model, enthalpy, reaction mechanisms
PENGEMBANGAN MEDIA PEMBELAJARAN KIMIA BERBASIS ANDROID UNTUK MENINGKATKAN MOTIVASI BELAJAR DAN PRESTASI KOGNITIF PESERTA DIDIK SMA Lubis, Isma Ramadhani; Ikhsan, Jaslin
Jurnal Inovasi Pendidikan IPA Vol 1, No 2: Oktober 2015
Publisher : Program Pascasarjana, Universitas Negeri Yogyakarta (UNY)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (569.119 KB)

Abstract

Penelitian ini bertujuan untuk mengembangkan media pembelajaran kimia berbasis android dan mengetahui karakteristik, kualitas dan efektifitas dari media pembelajaran berbasis android. Jenis penelitian ini merupakan penelitian dan pengembangan. Penilaian produk dilakukan oleh ahli media, ahli materi, pendidik kimia, peer reviewers dan uji coba peserta didik. Data penelitian dikumpulkan melalui angket penilaian media, angket motivasi dan tes, kemudian dianalisis dengan Manova. Hasil dari penelitian ini adalah: (1) media pembelajaran kimia berbasis android memiliki karakteristik, yaitu visualisasi menarik, praktis dan fleksibel serta evaluasi soal yang variatif, (2) media pembelajaran kimia berbasis android dinilai layak digunakan dalam pembelajaran, ditinjau dari aspek materi, aspek media dan hasil uji coba peserta didik, serta (3) terdapat peningkatan yang signifikan antara motivasi belajar dan prestasi kognitif peserta didik yang mengikuti pembelajaran menggunakan media pembelajaran kimia berbasis android dengan pembelajaran konvensional. Hasil penelitian ini menunjukkan bahwa media pembelajaran kimia berbasis android layak dan efektif digunakan dalam pembelajaran kimia. Kata Kunci: pengembangan, media pembelajaran kimia berbasis android, motivasi, prestasi kognitif.   DEVELOPING ANDROID-BASED CHEMISTRY INSTRUCTIONAL MEDIA TO IMPROVE THE LEARNING MOTIVATION AND COGNITIVE ACHIEVEMENT OF SMA STUDENTS Abstract The aims of this study are: to develop android-based chemistry instructional media and to reveal the characteristic, the quality, and the effectiveness of android-based chemistry instructional media. This research was research and development. The product assessment was conducted by a media expert, a material expert, chemistry teachers peer reviewers and students. The data collecting technique was done by using media evaluation questionnaires, motivation questionnaire and test, then it was analysed by Manova. The results of the study show that: (1) the android-based chemistry instructional media has characteristic such as interesting visualisation, practical and flexible and vary of evaluation test, (2) the developed android-based chemistry instructional media is appropriate for teaching, in terms of material evaluation aspect, media evaluation aspect, and based on the results of students’ tryout, and (3) there is a significant differences in the improvement of learning motivation and cognitive achievement of students between learning using android-based chemistry instructional media and conventional learning. The result showed that the android-based chemistry instructional media was appropritly and effectively used for teaching. Keywords: development, android-based chemistry instructional media, motivation, cognitive achievement
THE IMPACT OF VIRTUAL LABORATORY INTEGRATED INTO HYBRID LEARNING USE ON STUDENTS’ ACHIEVEMENT Solikhin, Febrian; Sugiyarto, Kristian Handoyo; Ikhsan, Jaslin
Jurnal Ilmiah Peuradeun Vol 7 No 1 (2019): Jurnal Ilmiah Peuradeun
Publisher : SCAD Independent

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1059.921 KB) | DOI: 10.26811/peuradeun.v7i1.268

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The virtual laboratory for electrochemistry materials has been developed. The characteristic of this virtual chemistry laboratory associated with the effect on students? achievement was analyzed. Thus this type of research was research and development by using ADDIE development model. In the implementation, the phase of the product was the quasi experimental method with a post-test only design. Classes used for this study were 3 classes, first-class using traditional laboratory, a second class using only virtual laboratory, and the third class using traditional laboratory and virtual laboratory as a supplement. All three classes were performed by the same teacher and the learning time. The instrument used to see the effect of the virtual laboratory was a test instrument. While the instrument used to assess the quality of the media was a questionnaire assessment. The results of this study were a developed virtual laboratory that can be operated via the web on smartphones and computers. In addition, the results of the assessment by the chemistry teachers stated that the virtual laboratory was in good quality and in classroom studies, the third and first classes showed significant differences. In the future research virtual laboratory as a supplement in other subject, matters can be developed.
Online Moodle Sebagai E-Learning Bagi Siswa SMK Peserta Praktek Kerja Industri Mubarrak, Akbar; Ikhsan, Jaslin
INVOTEC Vol 8, No 1 (2012)
Publisher : Faculty of Technological and Vocational Education-Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/invotec.v8i1.6107

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This study aims to integrate ICT by designing and applying online moodle as an e-learning material for class XII TKR.B students of SMK Negeri 1 Purworejo who undergo On Job Training for three months. In developing the e-learning, researchers use Research and Development method and ADDIE instructional design. Result of this study is the design and implementation of moodle as online learning media for OJT students. Teachers can upload learning modules and provide a test to determine the extent of students' understanding of material provided by the module. Online moodle can be accessed by students anytime and anywhere, either from mobile phone or internet cafes. All facilities provided in online moodle can easily be used as a medium of distance learning.
Supporting Students’ Basic Science Process Skills by Augmented Reality Learning Media Tiara Lestari Paembonan; Jaslin Ikhsan
Journal of Educational Science and Technology (EST) Volume 7 Number 2 August 2021
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/est.v0i0.19448

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Science process skills (SPS) are one of the skills needed in the chemistry learning process, in order to gain a complete understanding of the concepts. This skills categorized into two types; basic and integrated. This research aimed to develop a product of Augmented Reality (AR) learning media then to know its feasibility, practicality, and effectiveness on students’ basic SPS on acid base learning. The research adopted Research and Development (R&D) with 4-D model consisted of define, design, develop, and disseminate stages. Questionnaire was used to measure the feasibility and practicality. Then, the obtained data were analyzed by qualitative and quantitative descriptive. In addition, SPS test was used to measure the effectiveness of AR learning media and the data were analyzed by the test of One-way ANOVA, Tukey’s Post Hoc test, and General Linear Model (GLM) Univariate. The result showed that the AR learning media is feasible, practical, and effective with big influence to support students’ basic SPS on acid base learning.
ANDROID-BASED-GAME AND BLENDED LEARNING IN CHEMISTRY: EFFECT ON STUDENTS’ SELF-EFFICACY AND ACHIEVEMENT Nur Fitriyana; Antuni Wiyarsi; Jaslin Ikhsan; Kristian Handoyo Sugiyarto
Jurnal Cakrawala Pendidikan Vol 39, No 3 (2020): CAKRAWALA PENDIDIKAN, VOL. 39, NO. 3, OCTOBER 2020
Publisher : LPMPP Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/cp.v39i3.28335

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The 21st century learning system demands the use of technology in learning instruction. This research focuses on the comparison between the use of android-based-game and blended learning in the Chemistry subject on the hydrocarbon lesson toward students’ self-efficacy and achievement. A quasi-experiment with post-test only design was adopted in this research. A number of 143 eleventh graders from two public senior high schools in Purworejo Regency, Indonesia were selected in a cluster random sampling as the research sample. The sample was classified into three groups depending on the media used, i.e. android-based-game only on face-to-face learning (ABG-FTFL), blended learning only (BL), and both android-based-game and blended learning (ABG-BL). Self-Efficacy Scale (SES) was used to obtain the data of students’ self-efficacy while the hydrocarbon test was used to obtain students’ achievement. One-way Analysis of Variance, Kruskal Wallis test, and descriptive quantity technique were performed in the data analysis, and it is found that the use of these technologies has a significant effect on the students’ self-efficacy and achievement. The use of ABG-BL is better in improving students’ self-efficacy while BL is better in enhancing students’ achievement. Therefore, the use of android-based-game and blended learning can be emphasized as media in chemistry learning to gain better self-efficacy and achievement among students.
PENGEMBANGAN KOMIK IPA BERBASIS KARAKTER UNTUK MENINGKATKAN PEMAHAMAN KONSEP SISWA SMP WIYATA MANDALA BALIKPAPAN Elsa Yulianingsih; Jaslin Ikhsan
Jurnal Pendidikan Matematika dan Sains Vol 6, No 2 (2018): December 2018
Publisher : Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (99.144 KB) | DOI: 10.21831/jpms.v6i2.23943

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Penelitian ini bertujuan untuk menghasilkan media komik IPA berbasis karakter, mengetahui kelayakan media komik berbasis karakter, mengetahui keefektifan media komik berbasis karakter terhadap pengembangan nilai karakter dan pemahaman konsep IPA.     Metode yang digunakan dalam penelitian ini adalah Research and Development dengan mengacu pada 10 langkah utama yang dikembangkan oleh Borg Gall. Subjek coba pada penelitian ini adalah siswa kelas VIII SMP Wiyata Mandala Balikpapan dengan rincian: 10 peserta untuk uji coba kelompok kecil dan 30 peserta didik untuk uji coba lapangan. Pengumpulan data dilakukan dengan wawancara, angket, observasi, dan tes. Teknik analisis data yang digunakan adalah analisis deskriptif, teknik gain dan uji Wilcoxon.     Hasil penelitian menunjukkan bahwa: 1) telah dihasilkan media komik IPA berbasis karakter, 2) media komik yang dikembangkan ditinjau dari variabel kualitas aspek  media dan aspek materi menurut ahli, menurut guru dan respon siswa berkategori sangat baik, 3) pembelajaran dengan media komik yang dikembangkan efektif meningkatkan nilai karakter siswa, dan pemahaman konsep sains.Kata Kunci: pengembangan, media komik, nilai karakter, pemahaman konsep  DEVELOPING CHARACTER-BASED SCIENCE COMIC IN IMPROVING  STUDENTS’ CONCEPT UNDERSTANDING OF STUDENTS SMP WIYATA MANDALA BALIKPAPAN             The objectives of this research were to resulting of character-based science comics, to find out the appropriatness and the effecitiveness of character-based science comic in improving character values and science concept understanding.            This research is Research and Development (RD). The steps of development were adapted from 10 steps of Borg Gall model. The sample consists of 40 students of SMP Wiyata Mandala, Balikpapan, Indonesia from which 10 students participated in preliminary field testing, and the 30 other students participated in main field testing. The data were collected by using questionnaires, tests, observation and interview checklist. The data were analysed using descriptive statistics, Wilcoxon test and gain techniques.            The results showed that have produce character-based science comics, the media was very good in quality based on the reviews from the science education experts, teachers and students. The character-based science comic significantly improved students’ character and students’ science concept understanding.Keywords: research and development, comic, character values, concept understanding.
EFFECT OF MORDAN SYNTHESIS OF CANNED WASTE TO POWER IKAT DAN LAJU REMOVED METHYL VIOLET COLOR DYES BY FABRIC FIBER EFFECT OF MORDAN SYNTHESIS OF CANNED WASTE TO POWER Jaslin Ikhsan; Endang Widjayanti LFX; Sunarto Sunarto
Jurnal Penelitian Saintek Vol 19, No 1: April 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1379.186 KB) | DOI: 10.21831/jps.v19i1.2330

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This study aims to determine: the binding capacity of cloth toward methylene violet (MV) dye, the rate of releaseof methyl violet from cloth due to washing, and the effect of the addition of the mordant to the binding capacity and the rate of release. pH, temperature, and equilibrium time were always maintained in all experiments. Data of binding capacity were collected by isothem experiments and performed by measuring the concentration of methyl violet bound by cloth at various added-concentrations of methylene violet. Collected  data were analyzed with a Langmuir and Freundlich isotherm equations. Data of release rate were collected by mesuring the concentration of free methylene violet dye in solution due to washing as a function of time. The release data were analyzed using the Lagergren rate equation. The analysis showed that bonding between methylene violet and cloth occurs with releasing protons and via hydrogen bonds. Binding capacity was represented by the Freundlich isotherm equation on which the capacity was decreased by the addition of mordant, with represented bythe constants of k 1 , 2.45 x 10 -8  and 1.75 x 10-8  M MV per gram of cloth, respectively. The addition of mordant also deceleratedoubly the releaseof MV from cloth due to washing whose constants k - 2 were 2103.039 and 1013.958 mmol g-1 min-1, respectively.   
Pengembangan media pembelajaran berbasis android pada materi kelarutan untuk meningkatkan performa akademik siswa SMA Resti Yektyastuti; Jaslin Ikhsan
Jurnal Inovasi Pendidikan IPA Vol 2, No 1: April 2016
Publisher : Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (788.803 KB) | DOI: 10.21831/jipi.v2i1.10289

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Penelitian ini bertujuan untuk (1) mengembangkan media pembelajaran kimia berbasis Android pada materi kelarutan; (2) menguji tingkat kelayakan media pembelajaran yang dikembangkan; serta (3) menguji pengaruh penggunaan media pembelajaran yang dikembangkan terhadap performa akademik peserta didik SMA. Penelitian ini merupakan Research and Development dengan mengadaptasi model Borg Gall yang dimodifikasi menjadi lima tahap, yaitu pengumpulan informasi, perencanaan produk, pengembangan produk, validasi produk, dan evaluasi produk. Hasil penelitian menunjukkan bahwa (1) software media pembelajaran kimia berbasis Android pada materi kelarutan telah tersusun dengan mendapat masukan dari validator, teman sejawat dan pendidik kimia; (2) media pembelajaran yang dikembangkan dinilai layak digunakan pada pembelajaran kimia ditinjau dari penilaian aspek materi dan aspek media; serta (3) penggunaan media pembelajaran kimia yang dikembangkan memberikan pengaruh pada peningkatan performa akademik peserta didik SMA.Kata Kunci: media pembelajaran, motivasi belajar, hasil belajar, kimia, kelarutan. Developing Android-Based Instructional Media of Solubility to Improve Academic Performance of High School Students AbstractThis study aims to: (1) develop android-based chemistry instructional media  on solubility; (2) proof the feasibility of the developed chemistry instructional media; and (3) proof the effect of using the developed instructional media to the high school students academic performance. This study is classified to research and development that adapted  Borg Gall models modified into five steps: information collecting, product planning, product developing, product validation, and product evaluating. The results of this research are: (1) a software of android-based chemistry instructional media was developed; (2) the developed instructional media were appropriate for teaching, in terms of material and media aspects evaluation; and (3) using of the developed instructional media improved the high school students academic performance.Keywords: instructional media, learning motivation, learning outcome, chemistry, solubility.
PENINGKATAN PRESTASI DAN KEMANDIRIAN BELAJAR MAHASISWA MELALUI PENDEKATAN RECIPROCAL TEACHING DAN COOPERATIVE LEARNING Eli Rohaeti; Suwardi, Jaslin Ikhsan
Jurnal Cakrawala Pendidikan No 1 (2013): CAKRAWALA PENDIDIKAN Februari 2013, Th. XXXII, No. 1
Publisher : LPMPP Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/cp.v5i1.1265

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Abstrak: Penelitian tindakan kelas ini bertujuan untuk mendeskripsikan prestasi dan kemandirian belajar mahasiswa setelah mengikuti kegiatan pembelajaran dengan pendekatan reciprocal teaching dan cooperative learning. Subjek penelitian adalah mahasiswa Program Studi Pendidikan Kimia FMIPA UNY yang menempuh mata kuliah Kimia Fisika II pada tahun akademik 2009/2010. Penelitian tindakan kelas dengan dua siklus ini meliputi langkah-langkah perencanaan, implementasi tindakan, observasi, dan refleksi. Hasil penelitian menunjukkan bahwa setelah mengikuti perkuliahan, terdapat 92,31% mahasiswa yang mencapai ketuntasan belajar secara individual. Kemandirian belajar mahasiswa juga meningkat. Mahasiswa menunjukkan tanggapan positif terhadap perkuliahan. Mahasiswa antusias mengikuti kuliah.Kata Kunci: cooperative learning, belajar mandiri, kimia fisika, reciprocal teachingIMPROVING STUDENTS’ ACHIEVEMENT AND LEARNING INDEPENDENCE THROUGH RECIPROCAL TEACHING APPROACH AND COOPERATIVE LEARNINGAbstract: This action research was aimed at describing the students’ achievement and learning independence after joining the instruction using the reciprocal teaching approach and cooperative learning. The subjects were the students of the chemistry education department of FMIPA UNY taking the physics chemistry course II in the 2009/2010 academic year. The steps of this two-cycle action research included: planning, acting, observing, and reflecting. The findings showed that after joining the instruction, 92.31% of students had reached mastery learning individually. The students’ learning independence also improved. The students showed positive evaluation toward the instruction. The students were enthusiastic in joining the course.Keywords: cooperative learning, independent learning, physics chemistry, reciprocal teaching 
Co-Authors Ali, Safdar Andri Prasetyo Banu Aji Anti Kolonial Prodjosantoso Antuni Wiyarsi Ash Shiddiqi, Muhammad Habib Aslam, Shazia Asri Widowati Ayubi, Mizzan Basri, Muhammad Fikri M Cahyorini Kusumawardani Damayanti, Latifah Adelina Darma Gusti Lestari Della Novri Yanti Dina Dania Navieta Dina Dina, Dina Dyah Puspitasari Ningthias Eli Rohaeti Elsa Sriwahyuni Elsa Yulianingsih Endang Widjayanti LFX Erfan Priyambodo Erica Anna Pratiwi Febri Saputri Febrian Solikhin Ganang Nevangga Cahya Ardika Herlambang Nugroho Indyah Sulistyo Arty, Indyah Isma Ramadhani Lubis, Isma Ramadhani Isti Yunita Jumadi Jumadi K. H. Sugiyarto K. H. Sugiyarto, K. H. Kartika Gita Septiana Kristian H. Sugiyarto Kristian Handoyo Sugiyarto Kristian Handoyo Sugiyarto Kristian Handoyo Sugiyarto, Kristian Handoyo Kun Sri Budiasih Laifa Rahmawati Lutfiah Nur Hidayati Mar’attus Solihah, Mar’attus Mar’atus Solihah, Mar’atus Mizwan Amrul Khairi Mubarrak, Akbar Muhaimin Muhaimin Muhammad Fikri M Basri Nelson Tairas Nira Listyawati Nur Fitriyana Nur Huda Nuri Vina Mawadah Paembonan, Tiara Lestari Purwaningsih , Dyah Resti Yektyastuti Resti Yektyastuti, Resti Restu Utami Sa'adah, Siti Imroatus Sabar Nurohman Salman Ali Siti Imroatus Sa'adah Siti Imroatus Sa'adah Siti Sulastri Solikhin, Febrian Sri Rejeki Sudirman Nur Sukisman Sukisman Sulistiana Febriawati Sunarto Sunarto Sunarto Sunarto Suyanta Suyanta Tria Mardiana Wijayanti Endang, Wijayanti Wiji Astuti Yogo D. Prasetyo, Yogo D. Yoni Kurnia Yuyun Ernawati