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Ida Duma Riris
Universitas Negeri Medan
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Neuroscience Physics Public Health Social Sciences Other

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Analysis Of Student Misconceptions Using A Web-Based Diagnostic Test On Redox Material Silaban, Lamtiur Paronauli; Riris, Ida Duma; Muchtar, Zainnudin; Ginting, Elfrinda; Nasution, Haqqi Annazili
Jurnal Teknologi Pendidikan : Jurnal Penelitian dan Pengembangan Pembelajaran Vol. 9 No. 2 (2024): April
Publisher : UNDIKMA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jtp.v9i2.11102

Abstract

This study aims to determine the presence of student misconceptions in redox material, misconceptions in each concept of redox material, and factors causing student misconceptions in redox material in class XII MIA SMA N 2 Percut Sei Tuan. This research is a quantitative descriptive research. The sampling technique in this study used purposive sampling technique. The samples in this study were 32 students of class XII MIA 1 who were selected based on the recommendation of the chemistry teacher. Data collection techniques were carried out using a web-based three-tier diagnostic test, misconception questionnaire, and in-depth interviews (teachers and students). The results showed that the misconceptions identified using the web-based three tier diagnostic test on the redox concept as a whole was 31.718%, while students who experience incomprehension of the concept is 54.687%, students who understand the concept is 13.906% and understand the concept is not sure 1.25%. Students' misconceptions on each concept of redox material are highest on the concept of compound names at 43.8% and the lowest on the concept of equalizing redox reactions with the oxidation number method and the ½ reaction/ion electron method at 26.6%.Based on the results of questionnaires and interviews, each factor has an influence on misconceptions, the biggest misconceptions are teacher factors and teaching methods, namely 21.32% and 21.28%.
PELATIHAN PENGEMBANGAN KEWIRAUSAHAAN DALAM RANGKA PENINGKATAN INCOME GENERATE DENGAN PEMBUATAN INSTALASI TANAMAN HIDROPONIK DI DHARMA WANITA BADAN PUSAT STATISTIK SERDANG BEDAGAI Damanik, Marini; Riris, Ida Duma; Nasution, Zuhairiah; Nasution, Marnida Yusfiani; Pulungan, Ahmad Shafwan; Dewi, Ratna Sari; ,, Serimawarni; Sitorus, Rosa Nadya Evelyn; Pratiwi, Meidy Citra; Safruddin, Muhammad Sultan; Saputra, Ardi Maulanna
Journal of Community Research and Service Vol. 8 No. 2: July 2024
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jcrs.v8i2.62225

Abstract

Pemanfaatan lahan yang ada dimanfaatkan oleh Dharma Wanita dan Mitra Badan Pusat Statistik (BPS) Serdang Bedagai. Pemanfaatan lahan perlu disesuaikan dengan kebutuhan pangan semakin meningkat. Dengan begitu pemanfaatan lahan terutama lahan kosong maupun perkarangan rumah terus diupayakan untuk memenuhi kebutuhan pangan keluarga dan peningkatan perekonomian. Tim pengabdian masyarakat Universitas Negeri Medan mengupayakan sosialisasi terkait penanaman hidroponik berupa pakcoy dan selada air dengan beberapa tahap yaitu penyampaian materi terkait keunggulan dan manfaat tanaman hidroponik, praktek lapangan secara langsung mengenai penanaman tanaman hidroponik serta ternak lele untuk memanfaatkan saluran air di sekeliling BPS Serdang Bedagai. Alat berupa instalasi hidroponik serta bahan dasar yang dibutuhkan juga diberikan kepada mitra untuk pemanfaatan di perkarangan mitra serta keberlanjutan secara mandiri sehingga dapat meningkatkan perekonomian mitra.
Efektivitas Minyak Atsiri dan Ekstrak N-Heksana Daun Beluntas sebagai Insektisida Alami dengan Bioindikator Ulat Hongkong: Efektivitas Minyak Atsiri dan Ekstrak N-Heksana Daun Beluntas sebagai Insektisida Alami dengan Bioindikator Ulat Hongkong Juwita , Tita; Agustin, Nadia; Riris, Ida Duma; Eddiyanto; Hendrawan
AGROSAINSTEK: Jurnal Ilmu dan Teknologi Pertanian Vol 9 No 1 (2025): AGROSAINSTEK: Jurnal Ilmu dan Teknologi Pertanian
Publisher : Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/agrosainstek.v9i1.785

Abstract

Natural insecticides are pest control materials derived from natural sources such as plants. The use of natural insecticides is very important because it has a lower cost, is safe for living things and does not pollute the environment, so this study aims to determine the activity of essential oils and n-hexane extracts of beluntas leaves (Pluchea indica L.) as natural insecticides with bioindicators of Hong Kong caterpillars (Tenebrio molitor). Isolation of essential oils was carried out using the steam distillation method and extraction using the maceration method. Insecticide activity tests used the contact poison method and the residue method, with variations in extract and essential oil concentrations of 1%, 3%, 5%, 7%, 10%, 20%, 30% (v/v) and positive controls, namely Hippo insecticide and negative control tween 80. The results of the isolation of essential oils from beluntas leaves produced a yield of 2%, while extraction using the maceration method produced a yield of 1.84%. The results of the insecticide activity test using the contact poison method were more effective than the residue method. The insecticidal activity and n-hexane extract are more effective than essential oils, this is due to the differences in the content of secondary metabolite compounds contained in the extract and essential oil.
Co-Authors ,, Serimawarni Agustin, Nadia Ahmad Nasir Pulungan Albinus Silalahi Anastasya Simbolon, Veronika Anna Juniar Bajoka Nainggolan Damanik, Marini Damanik, Nova Dewi Syafriani Dewi Syafriani, Dewi Dimas Ridho Eddiyanto Ginting, Elfrida Ginting, Elfrinda Grace Octavia Hutasoit Gulo, Kristin Wulan Liberti Vivanis H, Herlinawati Haqqi Annazili Nasution Hasibuan, Desy Rahmayanti Hendrawan Indra Koto Junifa Layla Sihombing Junifa Layla Sihombing, Junifa Layla Juwita , Tita Kurniawan, Ekin Dwi Arif Marham Sitorus Marham Sitorus Marham Sitorus Marini Damanik Marini Damanik Mhd Fahmi Muchtar, Zainnudin Mutiara Agustina Nst Nasution, Haqqi Annazili Nasution, Marnida Yusfiani Neva Asih Sary Silalahi Nia Veronika Nora Susanti Nova Damanik Nurul Hidayah Nurul Khumaida Pratiwi, Alfira Julian Pratiwi, Meidy Citra Pulungan, Ahmad Shafwan Putri Faradilla Rabiah Afifah Daulay Ramadhaniyah, Nurul Ramlan Silaban Ratna Sari Dewi Ratna Sari Dewi Rinanda, Jihan Afstria Roza, Destria Safruddin, Muhammad Sultan Salsabila, Fuaddinda Putri Samosir, Rafidah Almira Saputra, Ardi Maulanna Sari, Dwy Puspita Saronom S ilaban Sibarani, Nancy Agalalis Silaban, Lamtiur Paronauli Sitorus, Rosa Nadya Evelyn Sri Adelila Sari Sumiati Nainggolan Tampubolon, Cindy Claudin Timotius Agung Soripada Tita Juwitaningsih Zuhairiah Nasution, Zuhairiah