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Natural Dye Production from Beetroot Using Vinegar and Non-Solvent : pH and Colorfastness Testing on White Fabric Rabiah Afifah Daulay; Sophia Gloria Bakara; Nailatul Fauzah Ritonga; Siti Khailafizah; Sofia Ramadhani; Suci Trianata Situmorang; Moondra Zubir; Abd Hakim S
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 2 (2025): JULY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i2.68739

Natural dyes derived from plants are increasingly attractive due to their safety and environmental friendliness. This study aimed to investigate the effect of vinegar as a natural solvent on the colorfastness of beetroot (Beta vulgaris L.) dye applied to white fabric. The research involved extracting pigments from beetroot, applying them to fabric, and testing the solution’s pH, drying time, and wash fastness. The results showed that pure beetroot extract had a pH of 5.2, while the addition of vinegar reduced the pH to 2.5–3.1. Fabric dyed with beetroot + vinegar exhibited higher initial color intensity (score 11) compared to pure beetroot (score 9), but its colorfastness dropped sharply after washing (score 4 vs. 7). Vinegar addition also prolonged fabric drying time from 12 minutes (without vinegar) to 17.5 minutes (with 20 mL vinegar). These findings indicate that vinegar enhances initial dye brightness but reduces colorfastness after washing. Nevertheless, beetroot dye remains a safer and eco-friendly alternative to synthetic dyes, although further optimization is required to improve its durability.

Perbedaan hasil belajar dan motivasi belajar siswa dengan menggunakan model PBL dan pembelajaran konvensional berbantuan media iSpring pada materi laju reaksi Aritonang, Hengki Wijaya; Moondra Zubir
Educenter : Jurnal Ilmiah Pendidikan Vol. 1 No. 8 (2022): Educenter : Jurnal Ilmiah Pendidikan
Publisher : ARKA INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55904/educenter.v1i8.107

This study aims to determine whether there is a significant difference in student learning outcomes and student learning motivation who are taught using the PBL model assisted by the Ispring media with the conventional learning model assisted by the iSpring media on the rate material at PAB 8 Saentis Private High School. The research population was all students of class XI SMA Private PAB 8 Saentis. The sample consisted of class XI students of SMA Swasta PAB 8 Saentis, which consisted of 2 classes, namely the experimental class (XI IPA 2) with the PBL model and the control class (XI IPA 3) with the conventional model. The instruments used are test and non-test instruments. The student learning outcomes data were first tested for normality and homogeneity, where the results obtained by the two samples were normally distributed and homogeneous. Hypothesis testing was carried out using the independent sample t-test, the results of this study showed that in hypothesis 1, a sig value of 0.001 was produced at a significance level of 5% (α= 0.05). if the value of sig < then Ho is rejected. Thus , it shows that there are differences in student learning outcomes who are taught using the PBL model assisted by the Ispring media with the conventional learning model assisted by the iSpring media . while hypothesis 2 obtained a sig value of 0.04 indicating differences in student learning motivation and hypothesis 3 obtained a sig value of 0.035 indicating a correlation between motivation and student learning outcomes who were taught using the PBL model assisted by the Ispring media with the conventional learning model assisted by the iSpring media.

Perbedaan hasil belajar dan motivasi belajar siswa dengan menggunakan model PBL dan pembelajaran konvensional berbantuan media iSpring pada materi laju reaksi Aritonang, Hengki Wijaya; Moondra Zubir
Educenter : Jurnal Ilmiah Pendidikan Vol. 1 No. 8 (2022): Educenter : Jurnal Ilmiah Pendidikan
Publisher : ARKA INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55904/educenter.v1i8.107

This study aims to determine whether there is a significant difference in student learning outcomes and student learning motivation who are taught using the PBL model assisted by the Ispring media with the conventional learning model assisted by the iSpring media on the rate material at PAB 8 Saentis Private High School. The research population was all students of class XI SMA Private PAB 8 Saentis. The sample consisted of class XI students of SMA Swasta PAB 8 Saentis, which consisted of 2 classes, namely the experimental class (XI IPA 2) with the PBL model and the control class (XI IPA 3) with the conventional model. The instruments used are test and non-test instruments. The student learning outcomes data were first tested for normality and homogeneity, where the results obtained by the two samples were normally distributed and homogeneous. Hypothesis testing was carried out using the independent sample t-test, the results of this study showed that in hypothesis 1, a sig value of 0.001 was produced at a significance level of 5% (α= 0.05). if the value of sig < then Ho is rejected. Thus , it shows that there are differences in student learning outcomes who are taught using the PBL model assisted by the Ispring media with the conventional learning model assisted by the iSpring media . while hypothesis 2 obtained a sig value of 0.04 indicating differences in student learning motivation and hypothesis 3 obtained a sig value of 0.035 indicating a correlation between motivation and student learning outcomes who were taught using the PBL model assisted by the Ispring media with the conventional learning model assisted by the iSpring media.

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

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

Adsorption and Desorption Properties of Beta Carotene in Crude Palm Oil on Activated Carbon Composites of Oil Palm Empty Fruit Bunches with MOFs-Cu(TAC) Frengky Sanjaya Ginting; Yunita Dwi Utami; Desika Devani Br Surbakti; Dika Fahreza; Wella Apriwidyanti; Therecia Fricillia Ginting; Putri Faradilla; Rini Selly; Jasmidi; Moondra Zubir
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.v8i1.68660

Oil palm bunches Empty fruit bunches are the main lignocellulosic solid waste that has not been optimally utilized, so many empty bunches are not processed. Unprocessed EFB causes a foul odor and becomes a place for flies to nest. Thus, it is considered as waste that pollutes the environment. Adsorption is a popular new method to reduce heavy metal content and waste in water, in addition the adsorption method is also effective and efficient in terms of the absorption process, and can also be a regeneration adsorbent. This study began with the preparation of empty oil palm bunches which were then carbonized and activated with H3PO4, then synthesized with MOFs-Cu(TAC). The final stage was tested for absorption by optimizing mass and time. The XRD pattern shows sharp peaks that appear on the graph indicating metal contact and the KA-Cu(TAC) composite has a good and regular crystal structure. The KA-Cu(TAC) composite has great potential as an alternative adsorbent to improve the quality of palm oil because it has good absorption.

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

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

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.

The Effect of Hole Variation on The Performance of Catalytic Conventer from Pulp Waste with Zeolit X Catalyst from Rice Husk Ash Iis Siti Jahro; Moondra Zubir; Jasmidi; Putri Faradilla; Banu Nursanni; Tania Evelin
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.v8i1.68667

The use of a catalytic converter in the exhaust is one solution to reduce pollutant levels in motor vehicle gas emissions. The catalytic converter was made using pulp waste and zeolite X from rice husk ash. This research examines the effect of varying number of holes 3, 5 and 7 on the absorption and conversion capacity of the catalytic converter. Making a catalytic converter from solid pulp waste consisting of grit, dreg and biosludge with the addition of zeolite synthesized from rice husk ash is carried out through the stages of granulating, mixing, molding and burning. The performance of the catalytic converter is measured using the Gas Analyzer shows that the catalytic converter with the 7 holes has the maximum absorption capacity for each motor vehicle gas emissions; CO, HC and CO2 respectively amounted to 39.06; 33.18 and 44.80% with an increase in O2 gas of 42.21%.

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

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.

Effectiveness of Using Ice Gel Packs as an Alternative Coolant Tariza Fairuz; Ayyu Rizkia Nasution; Dewi Pratiwi; Dhea Syah Nazwa Nasution; M. Rizky Fauzan Tampubolon; Nadia Priska; Lisnawaty Simatupang; Moondra Zubir
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.v8i1.68670

This research aims to evaluate the effectiveness of ice gel packs based on tapioca flour mixed with natural ingredients such as vinegar, lemon and lime as a cooling alternative. Ice gel pack is made through a process of mixing the ingredients until homogeneous, heating to form a gel, and freezing. Characteristic tests carried out include pH, freezing time, and temperature changes. The research results show that the acidity level of ingredients affects product performance. Ice gel packs with lime have the lowest pH (pH = 2) and show the best ability to maintain cold temperatures, while vinegar with the highest pH (pH = 4) freezes the fastest but is less effective in maintaining temperature. This research proves that a combination of natural ingredients can produce ice gel packs that are environmentally friendly, efficient, and have wide application potential as a modern cooling solution.

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