Article Per Year (5 Year)
p-Index From 2020 - 2025
5.672
P-Index
This Author published in this journals
All Journal Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) Jurnal SOLMA Eksakta : Berkala Ilmiah Bidang MIPA Sainstek : Jurnal Sains dan Teknologi Indonesian Journal of Chemical Science and Technology Jurnal Wawasan Pendidikan
Zubir, Moondra
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Other

Published : 45 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 45 Documents
Search

 1   2   3   4   5 
Effect of Sugar Addition on the Electric Current Strength of Mixtures with Vinegar, Lime Extract, Coffee, Salt Solution, and 70% Alcohol Wardana, Dian; Ramadhan, Dwi Sapri; Fahmi, Jam'an; Safitri, Wulan Dwi; Siregar, Ida Cathy Everyanti; Silalahi, Sarina Septiani; Zubir, Moondra; Siregar, Nurdin
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.v8i2.70611

Abstract

This study aims to examine the electric current strength of sugar mixed with various electrolyte and non-electrolyte solutions. The research employed an experimental approach using vinegar, lime extract, coffee solution, salt solution, and 70% alcohol combined with sugar solutions. A battery system and a digital multimeter were utilized to measure the resulting current in each mixture. The findings indicate that increasing the amount of sugar leads to a reduction in current strength, whereas decreasing the sugar content results in a higher current output.
Influence of EM4 Inoculum on Biogas Yield and pH Dynamics in Lettuce and Cabbage Waste Fermentation Ramadhan, Dwi Sapri; Safitri, Wulan Dwi; Wardana, Dian; Fahmi, Jam'an; Zubir, Moondra; Andini, Ayu; Simamora, Elisabeth; Limbong, Julian; Sihotang, Pelita; Husna, Wiki Nadia; Siregar, Nurdin
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.v8i2.70612

Abstract

Biogas production from vegetable waste offers a practical pathway for reducing organic residues and supporting small-scale renewable energy systems. This study investigates the influence of EM4 inoculum on gas accumulation and pH dynamics during an 8-day batch fermentation of lettuce and cabbage waste. Four reactors were prepared containing 200 g vegetable waste and 200 mL water with or without 30 g EM4. Gas accumulation was quantified by balloon circumference at day 2, day 4, day 6 and day 8 and converted to volume using geometric calculations. Lettuce generated the highest peak volumes with maximum values exceeding 330 cm³ while cabbage produced less than 60 cm³ under comparable conditions. pH trajectories showed that cabbage plus water decreased from pH 7 to pH 6 whereas lettuce plus water increased from pH 7 to pH 8. Reactors containing EM4 stabilised at pH 6 throughout the fermentation indicating inoculum-supported buffering. These results demonstrate that substrate characteristics strongly influence early-stage gas formation and that EM4 moderates pH fluctuations even under uncontrolled ambient conditions. The findings provide initial evidence that lettuce is a more degradable feedstock than cabbage and emphasise pH regulation as a key requirement for improving methane-oriented biogas performance in simple batch systems.
Effect of Organic and Inorganic Compounds on the Conductivity of Salt Solutions Safitri, Wulan Dwi; Wardana, Dian; Ramadhan, Dwi Sapri; Fahmi, Jam'an; Zubir, Moondra; Purba, Sunita Karin; Puandra, Esti Miska; Siregar, Nurdin
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.v8i2.70635

Abstract

This study examines the effects of selected organic and inorganic compounds on the electrical conductivity of salt solutions. Organic substances (sugar, coffee, tea, and a surfactant-based cleaner) and inorganic additives (ammonium chloride in cough medicine, povidone–iodine, and carbonated beverage) were mixed with salt solutions at varying concentrations to evaluate their influence on ion availability and mobility. The results show that conductivity increases proportionally with salt concentration, confirming that ion content is the primary factor governing charge transport. Inorganic ionic additives significantly enhanced conductivity by releasing additional ions into the solution, whereas non-ionic organic compounds consistently reduced conductivity at low salt levels by diluting ionic species and hindering ion mobility. Conductivity in organic mixtures increased only when salt concentration became dominant. These findings highlight the contrasting mechanisms of organic and inorganic additives in modifying electrolyte behavior and provide useful insight for chemistry education and simple electrochemical analysis.
Analysis of the Effect of Varying Concentrations of Strong Acids (HCl) and Weak Acids (CH3COOH) with Mixing of Bases (Detergent) on the Temperature Increase of the Reaction Results Fahmi, Jam'an; Ramadhan, Dwi Sapri; Wardana, Dian; Safitri, Wulan Dwi; Zubir, Moondra; Siregar, Nurdin; Br Sebanyang, Resi Mai Linda Etaminta; Br Napitupuli, Monika Shinta Kasih; Lumbantoruan, Sifra H.R
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.v8i2.70670

Abstract

Neutralization reactions between acids and bases are generally exothermic processes that release heat because of water formation from H⁺ and OH⁻ ions. This study aims to investigate the effect of varying concentrations of a strong acid (HCl) and a weak acid (CH₃COOH) on the temperature increase produced when these acids are reacted with a detergent-based alkaline material. Experiments were conducted using three acid concentrations—0.1 M, 0.3 M, and 0.5 M—each mixed with 3 g, 5 g, and 7 g of detergent in a reaction volume of 25 mL. The results indicate that increasing acid concentration correlates positively with greater temperature elevation. The largest temperature increase, 5.7°C, was observed in the reaction between 0.5 M HCl and 7 g of detergent, whereas the lowest increase, 0.5°C, occurred in the reaction between 0.1 M CH₃COOH and 3 g of detergent. Differences in ionization strength between strong and weak acids significantly influence the amount of heat released during neutralization. These findings demonstrate that both acid strength and base mass play important roles in determining the exothermic energy output of acid–base reactions.
Pemberdayaan Kelompok Tani melalui Inovasi Pupuk Organik untuk Meningkatkan Pendapatan BUMDes di Sibolangit Agus, Junaidi; Zubir, Moondra; Suprapto, Suprapto; Sinuraya, Arwadi; Ashari, Muhammad; Rahmaniar, Rahmaniar; Lubis, Aulia Madjid; Alexcandra, Hisar
Jurnal SOLMA Vol. 14 No. 3 (2025)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v14i3.20144

Abstract

Background: Limbah peternakan, khususnya kotoran sapi, menjadi permasalahan utama bagi kelompok tani di Kecamatan Sibolangit karena volumenya yang besar dan belum dimanfaatkan secara optimal. Kondisi ini menimbulkan pencemaran lingkungan sekaligus pemborosan sumber daya yang seharusnya memiliki nilai ekonomi. Sementara itu, BUMDes sebagai motor penggerak ekonomi desa belum mampu mengelola potensi tersebut secara berkelanjutan. Penelitian ini bertujuan untuk memberdayakan kelompok tani melalui inovasi pengolahan limbah peternakan menjadi pupuk organik dalam rangka meningkatkan pendapatan BUMDes. Metode: Metode pelaksanaan menggunakan pendekatan komprehensif melalui kombinasi penyuluhan, pelatihan berbasis praktik langsung, konsultasi teknis, serta pendampingan kelembagaan dengan dukungan observasi, wawancara, FGD, dan kuesioner. Hasil: Hasil kegiatan menunjukkan terbentuknya unit usaha pupuk organik di BUMDes dengan kapasitas produksi 2–3 ton per bulan. Evaluasi capaian menunjukkan peningkatan pengetahuan mitra sebesar 65% dan keterampilan praktis 78% berdasarkan perbandingan pre-test dan post-test. Produk pupuk organik yang dihasilkan memenuhi standar kualitas SNI dan mampu mengurangi volume limbah hingga 80% serta menurunkan pencemaran air tanah. Secara ekonomi, program ini memberikan tambahan pendapatan signifikan bagi BUMDes dan kelompok tani, sekaligus membuktikan efektivitas pemberdayaan berbasis inovasi limbah dalam mendukung pembangunan desa berkelanjutan.
Co-Authors AA Sudharmawan, AA Abd Hakim, Abd Agus, Junaidi ALEXCANDRA, HISAR Arayan, Miftah Arwadi Sinuraya Aulia, Amanda Aulia, Shelly Ayu Andini ayumi, Sheilla Maliza Azizah, Rifka Noor Azzahra, Nabila Batubara, Diva Angelica Amanda Br Manik, Trivena Myta Br Nadeak, Stephani Bintang N. Br Napitupuli, Monika Shinta Kasih Br Sebanyang, Resi Mai Linda Etaminta Br Sipahutar, Desy Meriani Cahyati, Riska Damanik, Angelica Damanik, Wicha Rosari Dikki Miswanda Dion Awfa Everyanti, Ida Cathy Fahmi, Jam'an Fahmi, Jaman Faradilla, Putri Fitri, Indah Hamasaki, Atom Husna, Wiki Nadia Intan Juwita, Intan Jannah, Nazria Marwatul Jasmidi Jasmidi Jasmidi Kabul, Abdul Hamid Khairahma Khairahmi Khairunisa, Dira Limbong, Julian Lubis, Aulia Madjid Lubis, Ghania Dhia Ulhaq Lumbantoruan, Sifra H.R Manalu, Anrian Haholongan Manullang, Okto Panca Manullang, Riska Greselia Maulina, Rissah Mendrofa, Bulan Susanti Muhammad Ashari Muhammad Luthfi Mustaqiman, Aulia Nur Nainggolan, Lidya Revalina Nasution, Dhea Ananda Nasution, Hafni Indriati Ningsih, Liska Kustria Novrizaldi Wardana Nurdin Siregar Ozeki, Sumio Panjaitan, Teguh Hidayat Prayogo, Wisnu Puandra, Esti Miska Pulungan, Ahmad Shafwan purba, Gracia Purba, Nesya Maharani Purba, Sunita Karin Putra, Adhitya Shahrian Rahmadyani, Zaskia Rahmaniar Rahmaniar, Rahmaniar Ramadhan , Dwi Sapri Ramadhan, Dwi Sapri Riga, Riga Rini Selly, Rini S, Abd Hakim Safitri, Wulan Dwi Sagala, Novitri Yolanda Sari, Lidia Mutia Sari, Maya Novita Sari, Trisna Kumala Savika, Anggraini Selly, r Sembiring, Rahel Natalia Sembiring, Rinawati Siahaan, Stephani Yunita Sigalingging, Olivia Gina Ananta Sihotang, Pelita Silalahi, Sarina Septiani Simamora, Astuty Evalina Simamora, Elisabeth Siregar, Ida Cathy Everyanti Siregar, Koriatul Jannah Sitompul, Maysaro Suprapto Suprapto Syafirna, Nada Syahirah, Atikah Nur Tambunan, Ida Mariati Tanjung, Amar Lohot Wardana, Dian Yusfiani, Marnida Zainuddin Muchtar