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Sukemi
Universitas Mulawarman
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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An Evaluation of the Antidiabetic and Antimicrobial Activity of an Ethanolic Extract from Rhizophora mucronata Leaf Usman Usman; Pintaka Kusumaningtyas; Sukemi Sukemi; Erwin Erwin
Jurnal Sains dan Kesehatan Vol. 5 No. 4 (2023): J. Sains Kes.
Publisher : Fakultas Farmasi, Universitas Mulawarman, Samarinda, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25026/jsk.v5i4.1978

Abstract

The aim of this research was to determine the antidiabetic and antimicrobial properties of ethanolic extract of Rhizophora mucronata leaves, as well as the phytochemical elements contained in the leaf extract. Extracts from R. mucronata leaf samples were obtained by maceration in ethanol-based solvents. The ethanolic extract of R. mucronata leaves is known to have an antidiabetic effect on mice, evidenced by its ability to reduce blood glucose levels. Giving ethanol extract at a dose of 600 mg/kg BW gives the greatest antidiabetic effect. The antibacterial activity of the extract against the tested bacteria and fungi was also limited due to the presence of contaminants in the ethanolic extract. The analysis of secondary metabolites using LC-MS revealed that the ethanolic extract of R. mucronata leaves contained 25 different secondary metabolite compounds. Furthermore research to purify and identify the compounds in the ethanolic extract of R. mucronata is required to develop this resource as an antimicrobial and antidiabetic drug based on natural materials.
ADSORPSI METILEN BIRU DENGAN MENGGUNAKAN ARANG AKTIF DARI DAUN TANAMAN DOYO (Curculigo latifolia) Pasa, Jessica Indriyani; -, Aldiansyag; Septiani, Risky; Prastika, Nanda Diah; Markus, Rio Mardani; Lestari, Sri; -, Sukemi; Gunawan, Rony
JURNAL ATOMIK Vol 9 No 2 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i2.1393

Abstract

Methylene blue adsorption research has been carried out using activated charcoal from Curculigo latifolia. This research aims to determine the characteristics of the Curculigo latifolia activated charcoal made and the optimum conditions for the adsorption of methylene blue by Curculigo latifolia activated charcoal. Physically activated charcoal is made from Curculigo latifolia which is carbonized at 400°C for 30 minutes, then the physically activated charcoal is soaked in 0.5 M H2SO4 solution for 24 hours to produce chemically activated charcoal. The results showed that the optimum pH for methylene blue adsorption obtained from the Curculigo latifolia activated charcoal adsorbent was physically activated at pH 7 and chemically activated at pH 9. The optimum contact time obtained from the physically and chemically activated Curculigo latifolia activated charcoal adsorbent occurred at a contact time of 15 minutes and 30 minutes. Adsorption of methylene blue by chemically activated Curculigo latifolia activated charcoal follows the Langmuir adsorption isotherm while physically activated charcoal follows the Freundlich adsorption isotherm. The optimum adsorbent mass of physically and chemically activated charcoal is 0.2 g and 0.25 g.
Analysis of Argument-Driven Inquiry Activity in Chemistry Textbooks Iis Intan Widiyowati; Ainun Rezkiva Arif; Sukemi Sukemi
Jurnal Tadris Kimiya Vol 8, No 2 (2023)
Publisher : Department of Chemistry Education, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jtk.v8i2.21243

Abstract

Argument-Driven Inquiry (ADI) in science learning can improve students' argumentation skills and understanding of concepts. In the textbooks, it is important to have ADI activities inside. This research aims to analyze ADI activities in the high school chemistry textbook Revised Curriculum 2013. This research used nine indicators of ADI activities: questions, evidence, student explanation, scientific theories, argumentation, communication and justification, analysis, connection, investigation report, and reflection. The research method used a descriptive instrument as an analysis sheet prepared based on ADI activities. Data was collected using documentation techniques and data analysis using content analysis of ADI activities. The results showed that the reliability test of the data obtained was 0.94 in the very good category. The ADI activity most found in textbooks is evidence activity, with a percentage of 31.25 Meanwhile, the textbook needs to explain question and answer and reflection activities. The textbook needs to increase ADI activities that support student-centered learning and teaching.
UJI FITOKIMIA DAN ANTIOKSIDAN EKSTRAK ETANOL PROPOLIS LEBAH KELULUT (Tetragonula iridipennis) DARI SAMARINDA KALIMANTAN TIMUR Binti Khairunnisa; Enih Rosamah; Harlinda Kuspradini; Irawan Wijaya Kusuma; Sukemi Sukemi; Nataniel Tandirogang; Enos Tangke Arung
Jurnal Ilmiah Manuntung Vol 6 No 1 (2020): Jurnal Ilmiah Manuntung
Publisher : jurnal ilmiah manuntung sekolah tinggi ilmu kesehatan samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51352/jim.v6i1.309

Abstract

The study aims to identify the secondary metabolite compounds contained in the ethanol extract Propolis Tetragonula Iridipennis and determine the antioxidant activity. Propolis is extracted from the beehive of Kelulut (Tetragonula Iridipennis) with a method of maceration of ethanol 96% produce a yield of 66.73%. Propolis extract contains alkaloid compounds, flavonoids, triterpenoids, tannins and carbohydrates. Propolis extract tested its antioxidant activity using the DPPH method (1.1-diphenyl-2-picrylhydrazyl) with a wavelength of 514 nm. Results showed a percentage of propolis extract free radicals 59% in concentrations of 100 ppm with IC50 33.74 ppm so that propolis extract is potentially as an antioxidant.
Pengaruh Model Pembelajaran PoE terhadap Keterampilan Berpikir Kritis pada Materi Koloid Siswa Kelas XI di SMA IT Granada Sefi Dwi Wahyuni; Muhammad Amir Masruhim; Sukemi Sukemi
Jurnal Pendidikan Kimia, Fisika dan Biologi Vol. 1 No. 6 (2025): November : Jurnal Pendidikan Kimia, Fisika dan Biologi
Publisher : Asosiasi Riset Ilmu Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/jupenkifb.v1i6.740

Abstract

Students' critical thinking skills in colloid material are still low, possibly due to a lack of problem-solving abilities. Therefore, the application of various learning models is considered necessary, one of which is Problem-Based Learning (PoE). This study aims to investigate the impact of PoE on students' critical thinking skills at Granada Polytechnic (SMA IT Granada) in colloid material. A quasi-experimental design and quantitative experimental methods were used. Fifty students from grades 11 A and B were selected as research subjects through census sampling. A post-test control design was used. Data collection used post-test data as primary data, supplemented by observation sheets of student classroom activities. The results showed that the average post-test score of the experimental group was 78, while the average post-test score of the control group was 59. The t-test results showed that the hypothesis Ha was true, therefore, it can be concluded that the application of the PoE model at Granada Polytechnic can improve students' critical thinking skills in colloid material.    
Ethnoscience as a Science Phenomenon in Science Learning to Increase Student Science Competency: A Literature Review Kevin Jeremia Hutauruk; Nabilah Dwi Rahayu; Elis Kaiye; Alvina Meutia Anzalna; Dian Rahmawati; Farah Erika; Sukemi Sukemi
Jurnal Penelitian Pendidikan IPA Vol 12 No 1 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i1.10055

Abstract

Students' science competencies are challenged in science education. It is caused by the fact that science concepts are commonly presented abstractly and not contextually. This study aimed to systematically map the use of ethnoscience phenomena in science education and their contribution to enhancing students' science competencies. The method employed was a systematic literature review with a quantitative bibliometric approach, based on the PRISMA guidelines, utilizing published articles from Scopus, Google Scholar, Semantic Scholar, and SINTA (2019 – 2024). Forty-four articles met the inclusion criteria. The study results show that the ethnoscience phenomenon in science education can be classified into four main themes, namely traditional food processing, ecology and local environment, traditional technology and tools, and material culture and chemical processes, which are consistently related to three aspects of PISA science competency: explaining scientific phenomena, designing and evaluating investigations, and interpreting scientific data and evidence. It can be concluded that ethnoscience is an effective contextual bridge between science concepts - students' cultural experiences, and offering a novelty as thematic mapping of ethnoscience phenomena and theoretical mechanisms for improving science competency, which serves as a basis in science learning development based local culture in the future.
The Implementation Guided Inquiry Learning and Students' Science Process Skills on the Topic of pH Trajectory Determination of Natural Acid-Base Indicators Aldi Kusuma; Intan Aulia Rahmadani; Laksmi Rahmaning; Sukemi Sukemi; M. Amir Masruhim; Yuli Hartati; Wirhanuddin Wirhanuddin
Journal of Educational Sciences Vol. 10 No. 4 (2026): Journal of Educational Sciences
Publisher : FKIP - Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jes.10.4.p.844-866

Abstract

Science process skills (SPS) are the students’ foundation for thinking scientifically, systematically, and critically to achieve a deep understanding of science concepts. This study aimed to analyze the implementation of guided inquiry learning and students’ SPS in determining the pH trajectory of natural acid–base indicators. A one-shot case study design was used involving 98 eleventh-grade students divided into three learning groups at a public senior high school in Samarinda. Learning implementation was measured through observation, while students’ SPS was assessed using tests, observations, and document analysis. Data were analyzed descriptively and inferentially using the Kolmogorov–Smirnov test for normality and the Kruskal–Wallis test for group differences. The results showed that teacher and student activities were in the excellent category (100% and 86–98%, respectively). The average SPS scores were in the fair category (69.31±5.20, 70.40±6.67, and 72.91±6.06). The Kruskal–Wallis test (p=0.082) indicated no significant difference among groups. Basic and procedural skills, i.e, observing, using tools and materials, and conducting experiments, developed very well, while higher-order thinking skills, i.e., interpreting, communicating, and formulating hypotheses, remained relatively low. Guided inquiry supports basic skills but requires reinforcement to improve higher-order scientific thinking skills.
Bahasa Indonesia Bahasa Indonesia Herliani; Lambang Subagiyo; Sukemi
Jurnal Penelitian Pendidikan IPA Vol 9 No 8 (2023): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i8.4735

Abstract

Anchored by the interview analysis, the present study explored students’ perceptions of blended learning enactment in Indonesian science classrooms. Data were garnered through questionnaires and semi-structured interviews focusing on students' perceptions of the benefits and challenges of adopting Blended Learning in science classes. Findings suggest that the benefits geared by blended learning in science classes include training students’ learning independence, increasing students’ understanding of science and technology, increasing students’ learning effectiveness, and providing students with a variety of learning experiences. Meanwhile, the challenges depicted in blended learning include practicum activities, internet problems, and economic condition. This study pictured blended learning as an alternative learning method for teachers and students.
Development of Audiovisual Learning Media: Dyeing Spun Silk Yarn Using Ketapang Leaf Extract Dimas Hartandi; Sukemi Sukemi; Farah Erika
Journal of Educational Sciences Vol. 10 No. 5 (2026): Journal of Educational Sciences
Publisher : FKIP - Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jes.10.5.p.1067-1085

Abstract

This study aimed to develop and validate an instructional video on dyeing spun silk using ketapang leaf extract as an ethnochemistry-based contextual learning medium. The study employed a Design and Development (D&D) approach using the Planning–Production–Evaluation (PPE) model. Validation was conducted by two subject content experts and two media experts. The results showed that the developed video achieved a very high validity level, with an average validity score of 100% for both subject content and media aspects. The reliability analysis also indicated a perfect agreement score (100%). These findings suggest that the instructional video met the criteria for suitability in terms of content accuracy, media design, and technical quality. In addition, the visualization of the dyeing process helped explain abstract chemical concepts, such as the interaction between natural dyes and fibers as well as color transformation processes, thereby supporting students’ conceptual understanding. Nevertheless, this study was limited to the expert validation stage and did not examine the effectiveness of the media on students’ learning outcomes in broader educational settings. Practically, the video can serve as a digital demonstration tool and contextual learning resource for sustainability-oriented textile chemistry instruction.
Implementation of the Remap-CIRC Learning Model Toward High School Students’ Learning Outcomes in Acid–Base Topics Agusto Jeremia Giawa; Sukemi Sukemi; Agung Rahmadani; Indah Lestari
Jurnal Zarah Vol. 14 No. 1 (2026): April, 2026
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v14i1.8136

Abstract

Students’ difficulty in understanding abstract and complex acid-base concepts requires the implementation of appropriate learning strategies. This study aims to evaluate the effectiveness of the Reading Concept Map-Cooperative Integrated Reading and Composition (REMAP-CIRC) learning model in improving students’ learning outcomes on acid-base topics. This research employed a pre-experimental method using a one-group pretest–posttest design. The participants consisted of 33 eleventh-grade students (Class XI-4) enrolled in the science track at State Senior High School 17 Samarinda during the 2024/2025 academic year. Data were collected through pretest and posttest instruments, as well as student response questionnaires. The data were analyzed using the Wilcoxon test to determine significant differences between pretest and posttest scores. The results showed that the average student score increased from 28.18 (pretest) to 73.64 (posttest). The N-Gain value was 0.61, categorized as moderate, while the effect size was 3.14, indicating a very high effect. In addition, the student response questionnaire showed a positive response with an average percentage of 79.84% (good category). Based on these results, it can be concluded that the REMAP-CIRC learning model is effective in improving students’ learning outcomes on acid-base topics.
Co-Authors -, Aldiansyag Achmad Rizal Alviandi Ade Fitria Nurdin Rizky Ade Irfan Agung Rahmadani Agung Rahmadani Agustina Amalia Islami Agusto Jeremia Giawa Ainun Rezkiva Arif Ajeng Ayu Rengganis Ajeng Hayu Pratiwi Aldi Kusuma Alvina Meutia Anzalna Anggita Anastasya Aris Madiun Daya Binti Khairunnisa Boyfanie Ivan Putra Desti Ramadhani Dian Palupi Rini Dian Rahmawati Dimas Hartandi Edy Suprianto Elis Kaiye Enih Rosamah Enos Tangke Arung, Enos Tangke Erwin Erwin Fahmi Romisa Farah Erika Farah Erika Farah Erika Farah Erika Firdaus Firdaus Firman Wahyudi Gabriel Ekoputra Hartono Cahyadi Gatot Edi Riyanto Gunawan, Rony Halim Halim Hanggara Arifian Harlinda Kuspradini Harra Ismi Farah Herliani Herman Herman Iis Intan Widiyowati Indah Lestari Indriana Tasya Intan Aulia Rahmadani Irawan Wijaya Kusuma, Irawan Wijaya Irsalinda Wessa Nurrahim Kevin Jeremia Hutauruk Khotifatul Defi Nofitasari Laksmi Rahmaning Lambang Subagiyo Laode Rijai Luthfi Talitha Fairuzy Fadjri M. Amir Masruhim Maasje Catherine Watulingas Markus, Rio Mardani Mitha Saputri MUHAMMAD AMIR MASRUHIM Muhammad Ismail Marzuki Muhammad Naufal Rachmatullah Nabilah Dwi Rahayu Nataniel Tandirogang Nindy Nur Rahmawati Nor Hikmah Nur Apriani Nurdianah Abdul Kadir Pasa, Jessica Indriyani Pintaka Kusumaningtyas Pintaka Kusumaningtyas Prastika, Nanda Diah Radoh Rinasih Hermawani Ratu Indah Sari Ricy Firnando Rismananda Ishmah Ronauli Nainggolan Rony Gunawan Ruqoyyah Nasution Safira Dyah Tara Dewi Sefi Dwi Wahyuni Sela Defi Alib Pradani Sela Defi Alib Pradani Septiani, Risky Siti Nurmaini Supriatno Salam Syahida Adha Usman Usman Usman Usman Usman Usman Wahyu Yunita Lestari Widya Purwati Wirhanuddin Yuli Hartati