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All Journal Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) International Journal Of Science, Technology & Management (IJSTM) Indonesian Journal of Chemical Science and Technology Jurnal Pengabdian kepada Masyarakat Jurnal Ilmu Pendidikan Indonesia JURNAL PENELITIAN BIDANG PENDIDIKAN
Ani Sutiani
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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The Effect of FSLC Model with Crossword Media on Interest and Learning Outcomes Desri Berliana Daeli; Ricky Andi Syahputra; Ani Sutiani; Iis Siti Jahro; Ratu Evina Dibyantini
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol. 7 No. 1 (2025): APRIL 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v7i1.67973

Abstract

The FSLC (Formulate Share Listen Create) model is a cooperative learning approach. This study compares the FSLC model with crossword media to a conventional PowerPoint-based model and examines the correlation between students' learning outcomes and interest. The sample included 25 purposively selected students per class for experimental and control groups with similar backgrounds. Using a pretest-posttest control group design, the experimental class learned electrolyte and nonelectrolyte solutions via FSLC with crossword puzzles, while the control class used PowerPoint. Results showed higher average interest (86.60 vs. 80.40) and outcomes (83.30 vs. 79.70) in the experimental group, with F_calculated > F_table. A strong correlation was found between interest and outcomes in the experimental class (r = 0.931 > r_table = 0.396), with a determination index of 11%, indicating a positive relationship.
Analysis of Enthalpy Changes in Jackfruit Seed (Artocarpus heterophyllus L.) Fermentation Process Based on Yeast Mass Dimas Ridho; Moondra Zubir; Ani Sutiani; Amanda Revalona Sitepu; Dita Indah Lorencia Silitonga; Maria Yovinta Silitonga; Muhammad Fisal
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68658

Abstract

This study investigates the fermentation process of jackfruit seeds (Artocarpus heterophyllus L.) as a bioethanol production source due to their high carbohydrate content. The research focuses on the effect of yeast mass on temperature fluctuations and reaction enthalpy (ΔH) during fermentation. Jackfruit seed flour was prepared and hydrolyzed with 5M HCl before fermentation with varying yeast masses. Temperature changes during fermentation ranged from 28.5°C to 32°C, depending on yeast mass, indicating the activity of Saccharomyces cerevisiae. The reaction enthalpy values for the samples were -126 J, -168 J, -504 J, and -1008 J, confirming the exothermic nature of the fermentation process
Fermentation Experiment of Arabica Coffee (Coffea arabica L.) from Dolok Sanggul with Variation of Gas Condition at Isothermal Temperature Rabiah Afifah Daulay; Moondra Zubir; Ani Sutiani; Jenny Lasria Florita Br.Tampubolon; Winda Silalahi; Amelia Rahmadhani; Muhammad Ali Athiya Zahran; Lisna Sevta Siburian
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68662

Abstract

Indonesia is one of the largest coffee producing and exporting countries in the world. One of the types of coffee that is famous in Indonesia is arabica coffee. This study examines the impact of different gas environments (open, semi-closed, and closed) on the fermentation process of Arabica coffee beans (Coffea arabica L.) at various temperatures (40°C, 60°C, and 80°C). The key factors analyzed were the moisture content and pH levels of the beans after fermentation and roasting. The findings revealed that both gas environment and temperature had a significant effect on the moisture content and pH of the beans, with higher temperatures (80°C) leading to a faster reduction in moisture. Additionally, the pH level was higher under open gas conditions. This research offers valuable information on how fermentation conditions influence the chemical properties and qualities of Arabica coffee beans.
Exploration of Making Perfume based on Extracts of Pandan Wangi (Pandanus amaryllifolius), Lemongrass (Cymbopogon citratus) and Orange Leaves (Citrus hystrix): Natural Aroma Innovation Putri Faradilla; Moondra Zubir; Ani Sutiani; Dinda Dwi Hasanah; Dian Finensia Saragih; Putri Rahmayani; Tesa Juliana Br.Samosir
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68665

Abstract

Perfume is a familiar product used in daily life, as a necessity to appear confident. Natural perfume is currently an essential use such as the use of panda, lemongrass and orange leaf extracts because the use of plants as basic perfume ingredients is safe and has minor side effects. This research aims to make a perfume that is durable, safe to use and low in alcohol content. The method used is the extract filtration method and then organoleptic test, alcohol content test and pH test. From the research conducted, perfume with pandanus extract has a longer lasting fragrance and is safe to use.
Using Spent Used Cooking Oil As An Aromatic Lamp Marnida Yusfiani; Moondra Zubir; Ani Sutiani; Cynthia Crasela Siregar; Gita Dwi Ayu Ninzy Tampubolon; Vindy Yosensi Saragih; Caecilia Antonia Purba; Najwa Shauqiyah
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68668

Abstract

The Carnot cycle consists of four processes: two isothermal and two adiabatic, which increase efficiency by regulating temperature. In contrast, the Rankine cycle overcomes Carnot's weaknesses by using steam heating and condensation. In addition, making candles from used cooking oil is an environmentally friendly innovation that processes waste into useful products. This process involves heating the oil to remove odors, mixing it with paraffin, and adding aromas. Making lamps from cans also utilizes used materials, demonstrating creativity in waste management. The 1:3 ratio (paraffin:oil), which is more oil-dominant, results in the fastest and most efficient burn, with the highest amount of candle mass burned after 40 minutes. This is suitable for applications that require rapid burning, such as in the creation of a moving nightlight that utilizes the Carnot cycle to convert heat into mechanical energy for movement. In contrast, the 3:1 ratio (paraffin:oil) produces a harder and more durable candle, with less mass burned, making it more suitable for long-term use and stable movement. The 1:2 and 2:1 ratios provide a balance between burn duration and light intensity, allowing them to be chosen based on specific needs.
Co-Authors . Suyati Amanda Revalona Sitepu Amelia Kudadiri Amelia Rahmadhani Arifin Suhendra Caecilia Antonia Purba Cinta Bela Cynthia Crasela Siregar Desri Berliana Daeli Dewi Wulandari Dian Finensia Saragih Dimas Ridho Dinda Dwi Hasanah Dita Indah Lorencia Silitonga Elisabeth Frenklin Pangaribuan Freddy Tua Musa Panggabean Gita Dwi Ayu Ninzy Tampubolon Hermawan Syahputra Iis Siti Jahro Imelda Prisilia Sinuhaji Jamalum Purba Jenny Lasria Florita Br.Tampubolon Lisna Sevta Siburian Maria Yovinta Silitonga Marnida Yusfiani Martina Restuati Moondra Zubir Muhammad Ali Athiya Zahran Muhammad Fisal Najwa Shauqiyah Pasar Maulim Silitonga Pratiwi, Risa Oktavia Putri Faradilla Putri Rahmayani Rabiah Afifah Daulay Rahmatsyah Rahmatsyah, Rahmatsyah Rambe, Imelda Wardani Ratu Evina Dibyantini Sanimah Syahputra, Ricky Andi Syawal Gultom Tesa Juliana Br.Samosir Vindy Yosensi Saragih Winda Silalahi Zulmai Rani