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Moondra Zubir
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Chemistry Department , State University of Medan Jl. Willem Iskandar Pasar V, Medan Estate Medan, Indonesia
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INDONESIA
Indonesian Journal of Chemical Science and Technology
Published by Universitas Negeri Medan
ISSN : 26221349     EISSN : 26224968     DOI : -
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology
Jurnal ini mempublikasikan artikel di bidang Kimia yang meliputi penelitian dasar dan terapan. Bentuk Publikasi di Indonesian Journal of Chemical Science and Technology : * Artikel * Review (berdasarkan permintaan Dewan Redaksi) * Communication (berdasarkan permintaan Dewan Redaksi)
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 237 Documents
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Isolation and Characterization of Hemicellulose from Empty Oil Palm Fruit Bunches Miswanda, Dikki; Savika, Anggraini; Syafirna, Nada; Sitompul, Maysaro; Selly, r; Zubir, Moondra
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 7 No. 2 (2024): JULY 2024
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v7i2.63247

Abstract

Isolation and characterization of hemicellulose from empty oil palm bunches have been carried out. The method used in the isolation is alkali extraction with NaOH solvent. Hemicellulose isolated from empty oil palm bunches was analyzed by organoleptic and solubility tests. Functional group analysis was carried out using FTIR, and morphology was performed using SEM. The highest yield of 12.84% was obtained from the variation of 0.5 N NaOH solvent. Organoleptic and solubility tests showed that the characteristics of hemicellulose isolated from empty oil palm bunches were by the characteristics of hemicellulose in general. The FTIR results of hemicellulose showed the specific absorption peaks of OH stretching, C-H stretching, C=O bending, C-OH bending, and C-C stretching. SEM photos show the rough and fibrous shape of the hemicellulose powder surface.
Identification of Lanosterol Protein As a Cataract Drug Candidate with Campheserol and Its Derivatives Using Docking and HKSA Computational Methods Ananta Adita Eka Putra; I Gusti Made Sanjaya
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.v8i2.68657

Abstract

As time goes by, technological development is becoming increasingly rapid. Many researchers, especially chemists, take advantage of this situation to advance their research. Furthermore, to support their research, it generally requires a significant amount of funding, because identifying a single compound necessitates numerous tools to determine whether it contains other compounds or their derivatives that can be used as potential drug candidates. Cataract drugs are not widely available in the world, therefore this article discusses cataract drugs. Docking computational methods and HKSA were used to identify a compound and its derivatives as drug candidates. The identified compound is campesterol and its derivatives. In the lanosterol protein, there are campesterol compounds and their derivatives that can be used for toothache medication. The results obtained through the HKSA process indicate that campesterol and its derivatives can be used as cataract medication.
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
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

Abstract

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

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.
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

Abstract

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

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.
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

Abstract

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.
Analysis and Characterization of Interactions Between Components in Claymask Formulations Khairatun Annisa; Ahmad Nasir Pulungan; Junifa Layla Sihombing
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.v8i1.68671

Abstract

The basic properties that need to be considered and maintained in the use of an ingredient in cosmetic and pharmaceutical formulations are: colloidal size, plasticity of crystal structure, mineralographic composition, high cation exchange capacity, development capacity, high specific surface area, and consequently strong adsorption and absorption capacity. Clay masks can contain active ingredients in the form of antibacterial with alternative natural ingredients such as babadotan leaf extract. The analysis of the functional cluster in the study was obtained using the Fourier Transform Infrared (FT-IR) method,Evaluation of clay mask preparations includes testing of physical and chemical properties. Testing of physicochemical properties consists of organoleptics, pH, homogeneity, dispersibility, adhesion and antibacterial test against bacteria p. Acnes. The stability of the preparation will be damaged if the mixing system is disturbed, mainly due to temperature changes and changes in composition due to excessive addition of one of the phases or if the emulsifying substances are not mixed with each other. The extraction results obtained from babadotan the yield produced is 17.63%. The FTIR spectrum obtained for the clay mask formulation shows the presence of new peaks at wave numbers 3310, 2120, 1430 and 2126 cm-1 where these peaks appear due to the additional ingredients used in the cosmetic formulation.The interaction between the components of the clay mask depends on the type of clay being applied. Interactions can be seen in FTIR with additional spectral peaks caused by other additives such as glycerin, In which the interaction shows the OH group involved in water absorption. This is because the results of all evaluations, Formula I tends to be stable close to the requirements of the clay mask preparation.

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