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All Journal VALENSI Prosiding Seminar Biologi Jurnal Pendidikan Kimia Jurnal Sains Dasar The Journal of Pure and Applied Chemistry Research Jurnal Inovasi Pendidikan IPA Jurnal Penelitian Pendidikan IPA (JPPIPA) INKUIRI : Jurnal Pendidikan IPA PAEDAGOGIA Momentum: Physics Education Journal International Journal of Pedagogy and Teacher Education Molekul: Jurnal Ilmiah Kimia JKPK (Jurnal Kimia dan Pendidikan Kimia) Proceeding Biology Education Conference Jurnal Abdi Masyarakat Indonesia Journal of Advanced Sciences and Mathematics Education Proceeding Seminar Nasional IPA Journal of Environment and Sustainability Education
Lina Mahardiani
Bachelor Program Of Chemistry Education, Faculty Of Teacher Training And Education, Universitas Sebelas Maret, Indonesia Jl.Ir Sutami No 36 A, Surakarta, Central Java
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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Synthesin and Characterization Chitosan Film with Silver Nanoparticle Addition As A Multiresistant Antibacteria Material Endang Susilowati; Sri Retno Dwi Ariani; Lina Mahardiani; Luthfia Izzati
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 6, No 3 (2021): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v6i3.57101

Abstract

The synthesis of chitosan films with the addition of silver nanoparticles (AgNps) has been carried out in 2 stages. The first stage is to make colloidal silver nanoparticles with chitosan as a stabilizer and a reducing agent with NaOH as an accelerator and assisted by microwave irradiation. The second stage is to make a film from colloidal silver nanoparticles-chitosan by casting method. The formation of silver nanoparticles was identified using a UV-Vis spectrophotometer and TEM. Chitosan films with the addition of AgNps were characterized by chemical, physical and mechanical properties. Furthermore, the antibacterial activity was tested against multi-resistant bacteria ESBL and MRSA. The results showed that the formation of AgNps was indicated by the appearance of an absorption band at 400-413 nm with a size of less than 6 nm. The FTIR spectra showed that there was a slight shift at the 1604 cm-1 peak which indicated that the AgNps interacted with the NH2 group on D-glucosamine of chitosan. The films morphology with addition Ag NPs tends to be rough in surface and cross-sectional. The presence of AgNps tends to increase the swelling value, tensile strength and film elasticity. Chitosan film with the addition of silver nanoparticles has antibacterial activity against multi-resistant bacteria ESBL and MRSA. The anti-bacterial activity of the film was derived solely from the silver nanoparticles.
The Effect of Calcination Temperature on Cobalt Oxide Species and Performance for Catalytic Ozonation of NH4+ in Water Lina Mahardiani
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 4, No 3 (2019): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1201.907 KB) | DOI: 10.20961/jkpk.v4i3.26702

Abstract

Cobalt oxide catalysts can be prepared by impregnation and calcined under different temperature to obtained different species of cobalt oxide, namely CoO(OH), Co3O4, and CoO. Co3O4 was the most appropriate catalyst for decomposing NH4+ with O3 in the presence of Cl– because of relatively high activity, 74%, and high selectivity for gas products, 88%, compared to CoO and CoO(OH). Cl– is necessary to proceed the catalytic ozonation of NH4+ since Cl– participate in the catalytic ozonation mechanism, while SO42– inhibited the process. During the catalytic ozonation of NH4+, Co3O4 showed no deactivation rather than enhanced the catalytic performance after repeated used up to 100% of NH4+ conversion. The Co3O4 can be regenerated by recalcining the catalyst under air at high temperature.
Natural Dye from Kepok Banana Leaf Stalk on Cotton Fabric with Variation of Fixation Taufik Ihsan; Sulistyo Saputro; Lina Mahardiani
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 3 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v5i3.46542

Abstract

The purposes of this study are to apply the natural dye obtained from Musa paradisiaca Var. Balbisiana Colla leaf stalk on cotton fabric with variation of fixation. The experiment was carried out by several steps including extraction of natural dye, mordanting process, dyeing process, fixation process and testing the application of natural dye on cotton fabric. The application testing was evaluated based on the color fastness againts washing and rubbing, color changes with gray scale and color staining with stainning scale. The results of this study show that extract of natural dye from Musa paradisiaca Var. Balbisiana Colla leaf stalk is applicable as natural dye in textile. Moreover, using fixation can increase the color fastness in which alum 10 g/L provided the best color fastness, ie scale 3-4 (good enough) for color fastness againts washing and dry rubbing, and 4 (good) for wet rubbing.
Rash Model Approach for Analysis of Misconception on Chemistry Learning with Distractor Analysis Sri Mulyani; Nur Haniza; Dimas Gilang Ramadhani; Lina Mahardiani
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 6, No 1 (2021): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v6i1.50517

Abstract

Multiple-choice questions can be used to identify misconceptions through distractor analysis. Distractor analysis for identifying misconceptions using Rasch modelling to find out how students choose options and whether they have any misconceptions. The test instrument uses questions from the teacher association in Indonesia to assess students’ ability to master chemical contexts. The number of question items used is 35 and has been validated and tested for reliability to be feasible to use. Questions were given to 462 first-year high school students. The fit item analysis results show that there are several questions related to clothing that indicate misconceptions. This is supported by the distractor analysis value, which found that misconceptions indicate questions related to electrolysis, the incidence of colligative properties in daily life and the factors that affect corrosion. The distractor’s value and the option probability curve are used to see how students know the ideas offered. The analysis results found that the material in the form of concepts and their application showed a large misconception, in which students would find it difficult to combine concepts and their applications.
Synergy of Carbon Nanofiber Innovation from Zinc Oxide Modified Sugar Palm Fiber as Advanced Materials for Arsenic Heavy Metal Waste Remediation Elisabeth Nugrahini; Lina Mahardiani; Ida Setiarini; Wieke Helma Anjelina
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 7, No 2 (2022): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v7i2.55969

Abstract

Heavy metal wastes cause water pollution. One of them is very toxic arsenic heavy metal waste; thus, treating them before they are released freely into the waters is necessary. In this case, the manufacture of carbon nanofibers (CNF) from sugar palm fiber waste is an innovation that can produce adsorbents to remediate heavy metals, thereby increasing the use value of sugar palm fiber waste. Carbon nanofiber from palm fiber (Arenga pinnata) was modified with ZnO metal, with varying concentrations of 0.1%, 1%, and 10%, in 1 gram of carbon nanofiber. Carbon nanofibers were made by carbonizing sugar palm fibers at 300oC for two hours. Furthermore, wet impregnation was carried out with Zn(CH3COO)2.2H2O and ended with calcination at 250oC for an hour, resulting in black nanofiber powder. This research was conducted to determine the effect of ZnO concentration on the characteristics of the carbon nanofiber produced and its effectiveness in remediating heavy metal arsenic. The ZnO/carbon nanofiber adsorbent material was then characterized using FTIR, XRD, and SEM analyses. Determination of the absorption of ZnO/carbon nanofibers on heavy metal arsenic was also assessed employing AAS analysis.
Improved Science Learning Outcomes Through Teams Game Cooperative Learning Tournament Dwi Putri Winanti; Baskoro Adi Prayitno; Lina Mahardiani
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 5 (2022): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i5.1655

Abstract

This research is an attempt to describe the increase of interest in Science of students of class VIII at SMP Negeri 2 Colomadu after the application of Teams Games Tournament (TGT) learning model. This research uses Class Action Research (PTK) method which includes planning, action, observation and reflection. The subjects in this study were students of class VIII at SMP Negeri 2 Colomadu, which amounted to 31 students. The object of this study is interest in learning science of students through Teams Games Tournament learning model (TGT). Data is fed by observation, test and documentation. Data analysis using comparative descriptive analysis technique with percentage. The results of this study indicate an increase in learning achievement of science students. This can be seen from the average score of learning achievement of science students also experienced an increase before the action of 68, in the first cycle of 75.5 and on the second cycle of 80.8. In addition, the percentage of students' learning mastery, example before the action of 63%, in the first cycle of 75% and in the second cycle of 94.75%. So it can be concluded that "Active learning model of TGT can improve the learning achievement of science students of class VIII in SMP Negeri 2 Colomadu".
Development of a Virtual Chemistry Laboratory Based on Green Chemistry to Increase Technological Literacy Focusing on Factors Affecting Reaction Rates Sri Mulyani; Anggie Lutfiyani; Lina Mahardiani
PAEDAGOGIA Vol 26, No 1 (2023): PAEDAGOGIA Jilid 26 No 1 (2023)
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/paedagogia.v26i1.71851

Abstract

This study aimed to develop and evaluate the effectiveness of a Green Chemistry-based virtual laboratory learning module in enhancing high school students' technology literacy. The research design utilized the ADDIE model, including Analysis, Design, Development, Implementation, and Evaluation. The study's participants were 12 students for a limited scale test and 36 students for a field test, selected through purposive and cluster random sampling, respectively. The data were collected through questionnaires and analyzed using statistical techniques, including Sudijono's media feasibility interpretation scale and the System Usability Scale (SUS) questionnaire. An Independent-Sample T-Test was used to assess the effectiveness of the media in empowering student technology literacy. The results showed that the developed virtual laboratory learning module effectively enhanced students' technology literacy, with a significant difference between the experimental and control groups. This study's findings indicate that virtual laboratories based on green chemistry provide a more engaging and enjoyable learning experience, allowing students to be more involved in the learning process and better understand chemistry concepts. The utilization of virtual laboratories can also enhance students' ability to use technology, which is essential in today's digital world. Developing and implementing this Green Chemistry-based virtual laboratory learning module can improve chemistry education and students' digital literacy.
A Content Analysis of Pictorial Material in The Chemistry Textbooks on The Topic Redox Reaction Based on Chemical Representation Siti Nur Afifah; Lina Mahardiani; Budi Utami
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 8, No 1 (2023): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v8i1.72885

Abstract

Chemical representations can assist learning in understanding abstract concepts. Images can transform complex information into a form that is easier to interpret and understand. Therefore, the requirement of visual representations in chemistry textbooks is beneficial and necessary to enhance understanding of chemistry. This qualitative descriptive study analyses pictorial material related to redox reactions in chemistry textbooks based on chemical representation. This study analyzed three chemistry textbooks for 10th   senior high school from different publishers that met the criteria in the purposive sampling specified. The three books contain topic redox reactions, 2013 curriculum, already have an ISBN, are used by schools, and have interesting pictures or illustrations. The instrument was developed based on the five criteria for chemical representation. Cohen Kappa coefficient was used to measure inter-rater agreement. The results show this study has an almost perfect agreement (0,891). The pictorial material in the three textbooks has macroscopic, submicroscopic, multiple, and mixed types of visual representation. The study analyzed the pictorial material or visual content in three chemistry textbooks (books A, B, and C). The results showed that the type of visual representation with the highest percentage was macroscopic, which was 58.33% in book A, 50% in book B, and 57.14% in book C. The highest proportion of ambiguous interpretation of surface features was found in topic redox reaction compared to other typologies, which was 50% in book A, 50% in book B, and 57.14% in book C. Most of the images in the textbooks were completely related and linked to the text and had image captions. The textbooks had a high level of relatedness to the text, with completely related-linked percentages of 66.67% in book A, 70% in book B, and 57.14% in book C. The study found that the pictorial material presented in the three books met the standard criteria of chemical representation. The study's findings can be used as a reference for teachers to determine student learning resources for chemistry textbooks with appropriate chemical representations, which can help improve students' understanding of the subject.
ANALISIS PENGETAHUAN ILMIAH PROSES PEMBUATAN PEUYEUM SEBAGAI KEARIFAN LOKAL JAWA BARAT DAN POTENSINYA DALAM PEMBERDAYAAN KEMAMPUAN BERPIKIR KRITIS Meta Aulia Rakhmani; Suciati Suciati; Lina Mahardiani
INKUIRI: Jurnal Pendidikan IPA Vol 12, No 1 (2023): INKUIRI: Jurnal Pendidikan IPA
Publisher : Magister Pendidikan Sains Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/inkuiri.v12i1.66715

Abstract

Penelitian ini bertujuan untuk menganalisis pengetahuan ilmiah dalam proses pembuatan peuyeum sebagai kearifan lokal Jawa Barat dan potensinya dalam memberdayakan kemampuan berpikir kritis siswa SMP. Metode penelitian yang digunkaan adalah kualitatif deskriptif. Teknik pengambilan sampel dengan teknik purposive sampling dengan jumlah sampel sebanyak 32 orang produsen peuyeum yang berdomisili di Kota Bogor dan Kabupaten Bogor. Teknik pengumpulan data dengan wawancara, observasi, dan dokumentasi. Validitas data menggunakan triangulasi teknik. Analisis data secara interaktif yang meliputi: (1) kondensasi data; (2) penyajian data; dan (3) penarikan kesimpulan. Kesimpulan dari peneltian ini adalah terdapat pengetahuan ilmiah dalam proses pembuatan peuyeum yang meliputi: konsep biologi seperti proses fermentasi, pencemaran lingkungan; konsep kimia seperti perubahan senyawa kimia, senyawa kimia berbahaya, dan konsentrasi senyawa; dan konsep fisika seperti kalor, serta proses pembuatan peuyeum berpotensi dalam memberdayakan kemampuan berpikir kritis siswa SMP.This study aims to analyze scientific knowledge in the process of making Peuyeum as a local wisdom of West Java and its potential in empowering critical thinking skill on junior high school students. This type of research was descriptive qualitative. The sample technique of this research is purposive sampling of 32 Peuyeum producer who lives in Kota Bogor and Kabupaten Bogor. Data collection technique was conducted by interviews, observation, and documentation. Data validity used is triangulation technique. The data analysis used was interactive model, specifically: (1) data condensation; (2) data presentation; and (3) data conclusion. Conclusions of this study is there are scientific knowledge in the process of making peuyeum, such as: on biology aspect there is fermentative process, and environmental pollution; on chemistry aspect there is chemical compound, dangerous chemical compounds, and concentration compound; and on physics aspect there is heat, also the process of making Peuyeum have the potential to empower critical thinking skills on junior high school students.
Development of an Environment-Based Critical Thinking Skills Test Instrument for Class VII Middle School Science Learning Ayuana Kartika Dewi; Baskoro Adi Prayitno; Lina Mahardiani
Jurnal Penelitian Pendidikan IPA Vol 10 No 8 (2024): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i8.7748

Abstract

This research developed an environment-based critical thinking skills test instrument for science learning in class VII middle school to answer the problem of students' low critical thinking skills in Indonesia. The aim of the research is to produce a valid and reliable instrument to measure students' critical thinking skills in an environmental context. The research method uses the ADDIE development model with a pre-experimental design (one group pretest-posttest). Research findings show that the instrument developed has high validity and reliability and is able to significantly improve students' critical thinking skills. The conclusion of this research is that environment-based test instruments are effective in measuring and improving students' critical thinking skills. The implications of this research show the importance of integrating environmental issues in learning modules to improve the quality of science education in Indonesia.
Co-Authors Adiyastuti, Nunuk Nurcahyani Anggie Lutfiyani Ashadi Ashadi Asri Nugraheni, Febriani Sarwendah Ayuana Kartika Dewi Bakti Mulyani Bakti Mulyani Baskoro Adi Prayitno Baskoro Adi Prayitno Bramastia Bramastia, Bramastia Buana, Contias Edar Budi Utami Budi Utami Catur Saputro, Agung Nugroho Ciptonugroho, Wirawan Damayanti, Nida Desti, Icha Dimas Gilang Ramadhani Dwi Putri Winanti Elisabeth Nugrahini Endang Susilowati Endang Susilowati Enggar Kurniawan Gunawan, Kadek Dwi Hendratma Ida Setiarini Imron, Erlambang Muhammad Inung Widyastuti Isma Aziz Fakhrudin Lestari, Wahyuning Luthfia Izzati Maharani, Rizki Deva Maria Ciptaning Sabdo Kawedhar Meta Aulia Rakhmani Mohammad Masykuri Muhammad Nur Hudha Mulyani, Bakti Mulyani, Bhakti Nanik Dwi Nurhayati Natalia Diyah Hapsari Nisa', Salsabila Kholifahtun Nunuk Nurcahyani A Nur Haniza Nurhudha, Muhammad Nurma Yunita Indriyanti Nurma Yunita Indriyanti Nursalsabila, Zamzami Pratama, Ferry Yudha Prihantoro, Alita Selvi Rahmawati , Raisya Rakhma Amalia Nurdina Rasyada, Ahyana Riezky Maya Probosari Rizka Fauzia Hanif Saputro, Sulistyo Septianing, Pingki Wahyu Siti Nur Afifah Sri Mulyani Sri Mulyani Sri Mulyani Sri Retno Dwi Ariani Sri Retno Dwi Ariani Suciati Suciati Sulistyo Saputro Sulistyo Saputro Sulistyo Saputro Sulistyo Saputro Tanghal, Analiza B. Taufik Ihsan Triyono Triyono Wahyuni, Nita Tri Wega Trisunaryanti Wieke Helma Anjelina Wima Pudya Ajunda Windiasty, Ananda Dea