cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Johnson Naat
Contact Email
johnson_naat@staf.undana.ac.id
Phone
+6285363309691
Journal Mail Official
jurnalbetakimia@undana.ac.id
Editorial Address
Program Studi Pendidikan Kimia Fakultas Keguruan dan Ilmu Pendidikan Universitas Nusa Cendana Jl. Adi Sucipto, Penfui P.O. Box 104, Kupang 85001 Nusa Tenggara Timur
Location
Kota kupang,
Nusa tenggara timur
INDONESIA
Jurna Beta Kimia
Published by Universitas Nusa Cendana
ISSN : 28077962     EISSN : 28077938     DOI : https://doi.org/10.201185/jbk.v3i1
Core Subject : Science, Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Education
Jurnal Beta Kimia (JBK) dengan e-ISSN: 2807-7938 (online) dan p-ISSN: 2807-7962 (print) adalah Jurnal yang diterbitkan oleh Program Studi Pendidikan Kimia FKIP Universitas Nusa Cendana. Jurnal ini dengan frekuensi terbitan 2 (dua) kali setahun yaitu pada bulan Mei dan November. Jurnal ini berfokus pada bidang Pendidikan dan Sains Kimia. Naskah artikel yang diterbitkan dalam Jurnal ini adalah Original Article, Short Communication dan review article yang bertujuan untuk memberikan kontribusi dalam diskusi penelitian, pengalaman, pengembangan, pengajaran dan diseminasi terkait bidang pendidikan kimia dan sains kimia. Fokus dan ruang lingkup Jurnal Beta Kimia adalah: Pendidikan dan pengajaran Kimia Pendidikan Sains Media pembelajaran kimia Kimia sekolah Kimia organik Kimia anorganik Kimia fisika Biokimia dan bioteknologi Kimia material Kimia lingkungan Redaksi menerima artikel-artikel dari para pendidik (dosen dan guru), pemerhati Pendidikan kimia, Peneliti Pendidikan Kimia untuk diterbitkan dan Artikel yang diterbitkan dalam jurnal ini merupakan artikel yang belum dan tidak akan diterbitkan di tempat lain.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 90 Documents
 5   6   7   8   9 
Low-Temperature Synthesis of ZnO Nanoparticles Using a Water-Methanol Solvent for Rhodamine B Photodegradation Christanti, Cindy Claudia; Benu, Didi Prasetyo
Jurnal Beta Kimia Vol 5 No 1 (2025): Volume 5 Number 1, May 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v5i1.21305

Abstract

Water pollution caused by organic dyes represents a significant environmental issue demanding effective treatment methods. This study aimed to synthesize zinc oxide (ZnO) nanoparticles at a low temperature using a water-methanol mixed solvent and evaluate their photocatalytic potential for the degradation of Rhodamine B (RhB). ZnO nanoparticles were successfully synthesized at a low temperature of 60°C utilizing a mixture of water and methanol as the solvent. Characterization results from X-ray diffraction (XRD) and Field Emission Scanning Electron Microscopy (FESEM) confirmed that the synthesized material consists of wurtzite structure ZnO nanoparticles. Analysis using UV-Vis Diffuse Reflectance Spectroscopy (DRS) showed that the material possesses a band gap energy of 3.16 eV. The as-synthesized ZnO nanoparticles exhibited effective photocatalytic activity for the degradation of the model pollutant RhB under UV light irradiation. A high photodegradation efficiency of 95.58% was achieved within 45 minutes, with a first-order reaction rate constant (k) of 0.0571 min⁻¹. This low-temperature synthesis method based on the water-methanol solvent mixture proved to be a promising and efficient route for producing active ZnO photocatalysts potentially applicable in treating organic dye-contaminated wastewater.
Kajian Argumentasi Mahasiswa dalam Isu Sosial-Kimia: Pendekatan Socio -Scientific Issues Bambut, Klaudia Ensriana Norlasty; Tangpen, Jeni Maria
Jurnal Beta Kimia Vol 4 No 2 (2024): Volume 4, Nomor 2: November 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v4i2.23075

Abstract

Penelitian ini bertujuan untuk menganalisis tingkat argumentasi mahasiswa dalam merespons isu sosial kimia (Socio-Scientific Issue/SSI) menggunakan pendekatan kuantitatif deskriptif. Sampel terdiri dari 75 mahasiswa Pendidikan Kimia FKIP Undana (semester 4-6) yang dipilih melalui teknik klaster. Instrumen utama berupa soal argumentasi tertulis berbasis SSI (validitas tinggi ; reliabilitas 0.795). Jawaban mahasiswa selanjutnya dianalisis menggunakan rubrik Level of Argumentation. Hasil analisis menunjukkan bahwa distribusi tingkat argumentasi membentuk pola piramida terbalik, dengan mayoritas mahasiswa (32%) berada pada level 2 (mampu menyusun argumentasi yang mengandung claim dan data), selanjutnya level 3 (28%), level 1 (18,7%), level 4 (13,3%), dan level 5 (8%). Secara komponen, claim muncul dalam seluruh respons (100%), data pada 82,7%, warrant (52%), backing (27,3%), dan rebuttal hanya pada 14,7% mahasiswa. Temuan ini menunjukkan bahwa sebagian besar mahasiswa berada pada tingkat argumentasi yang rendah dengan struktur yang masih sederhana dan minim. Dominasi claim dan data tanpa warrant, backing, dan rebuttal mencerminkan keterbatasan berpikir kritis dan reflektif. Perlu adanya strategi pembelajaran berbasis SSI dan dialog argumentatif untuk mengembangkan keterampilan berpikir kritis dan literasi sains yang lebih mendalam.
Validitas Subject Specific Pedagogy (SSP) Blended Learning Berbasis Multiple Representative Pada Materi Sistem Koloid Panie, Maria Yuliana; Mulyani, Sri
Jurnal Beta Kimia Vol 4 No 2 (2024): Volume 4, Nomor 2: November 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v4i2.23496

Abstract

Penelitian ini bertujuan untuk mengetahui validitas Subject Specific Pedagogy (SSP) blended learning berbasis multiple representative pada materi sistem koloid. Penelitian ini menggunakan model pengembangan Design Based Research (DBR) yang terdiri dari empat langkah yaitu identifikasi masalah, rancangan dan pengembangan, uji coba produk berulang, dan refleksi. Namun pada penelitian ini dibatasi hingga tahap pengembangan. Subjek dalam penelitian ini adalah 30 siswa dan 2 guru kimia SMAN 3 Kupang Timur serta 9 orang ahli yang terdiri dari 2 ahli materi, 1 ahli media, 1 ahli evaluasi dan 5 orang ahli pendidikan yaitu guru yang memiliki masa kerja lebih dari 15 tahun. Instrumen yang digunakan dalam penelitian ini adalah Subject Specific Pedagogy (SSP) blended learning berbasis multiple representative yang terdiri dari perangkat pembelajaran RPP, Silabus, LKPD, Modul Ajar dan Soal Evaluasi. Skor validitas isi produk berkisar antara 0,75-0,88 dengan kriteria validitas tinggi-sangat tinggi. Hasil validasi tersebut menunjukkan bahwa SSP yang dikembangkan berada pada kategori sangat valid dengan rata-rata skor di atas kriteria kelayakan yaitu lebih besar dari 0,72. Temuan ini menunjukkan bahwa SSP blended learning berbasis multiple representative layak digunakan sebagai alternatif pembelajaran kimia, khususnya pada materi sistem koloid untuk mendukung pembelajaran yang bermakna dan meningkatkan pemahaman siswa secara menyeluruh.
Isolation and Identification of Halotolerant Bacteria in Saline Soils from the Coastal Areas of Oebelo White Sand Beach and Pariti Beach Lawa, Yosep; Utami, Serlina; Lede Kore, Rut Delviana; Neolaka, Yantus A. B.; Lalang, Arvinda Ceniorita; Nenohai, Jacky Anggara; Kutu Woa, Maria Anastasia
Jurnal Beta Kimia Vol 5 No 2 (2025): Volume 5 Number 2, November 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v5i2.19815

Abstract

A study has been conducted to isolate and identify halotolerant bacteria in saline soils from the coastal areas of Oebelo White Sand Beach and Pariti Beach. The sampling method used was random sampling. During sampling, pH, electrical conductivity (EC), and soil temperature were also measured. Bacterial isolation was performed using a serial dilution technique, resulting in three pure isolates from each beach sand sample. The isolates were cultured on Nutrient Agar (NA) medium and incubated at 37°C for 24 hours. The colonies obtained were small, round, and white. The isolates were then purified using the streak plate method. The halotolerant test was conducted using Tryptic Soy Agar (TSA) medium without added salt. The results showed that the bacterial colonies were halotolerant, as indicated by growth after 24 hours of incubation. Further biochemical tests, including motility, citrate utilization, urease, and sugar hydrolysis, revealed that all isolates from Oebelo White Sand samples showed positive results for all tests, whereas isolates from Pariti Beach exhibited some variations. These findings indicate that the isolates were capable of hydrolyzing urea into ammonia, utilizing citrate as a carbon and energy source, and fermenting sugars present in the medium.
Development of Student Worksheets on Thermochemistry Material Based on Problem-Based Learning (PBL) for Phase F Pong, Anjela A.; Hayon, Vinsensia H.B.; Boelan, Erly Grizca
Jurnal Beta Kimia Vol 5 No 2 (2025): Volume 5 Number 2, November 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v5i2.21201

Abstract

This study aims to evaluate the validity of Student Worksheets (LKPD) in thermochemistry material designed using a Problem-Based Learning (PBL) approach, assess the implementation of learning using the PBL model, and examine students’ responses to the developed worksheets. The research employed the 4-D development model, although it was limited to the development stage only. The study involved 26 students from class XI.3 at SMA Negeri 1 Semau Selatan as the research subjects. Data collection methods included interviews, validation, and the distribution of questionnaires. The results of the study revealed that: (1) the developed Student Worksheets was considered highly valid, with average scores from material expert validators I and II at 93,05% and 98,6%, respectively, and from media expert validators I and II at 91,65% and 94,45%, respectively; (2) all aspects of classroom learning using the PBL model were implemented successfully; and (3) students’ responses to the LKPD were very positive, with an average score of 90%.
In Silico Study of the YAKRCFR Peptide Structure and Its Interaction with Human Peroxiredoxin-5 Najoan, Jessika Maya Jovanka; Rumampuk, Rymond Jusuf; Paat, Vlagia Indira; Aloanis, Anderson Arnold
Jurnal Beta Kimia Vol 5 No 2 (2025): Volume 5 Number 2, November 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v5i2.22710

Abstract

The identification of bioactive peptides with therapeutic potential is an emerging focus in drug discovery. In this study, we evaluated the structural stability and binding affinity of the oyster-derived peptide YAKRCFR through molecular modeling and docking simulations against the human peroxiredoxin receptor. Structural prediction using the PEP-FOLD4 server revealed a consistent α-helical conformation across all models, stabilized by key intramolecular hydrogen bonds and favorable sOPEP energy values. Molecular docking was validated with a root mean square deviation (RMSD) of 0.273 Å, confirming the reliability of the docking protocol. The YAKRCFR peptide exhibited a strong binding affinity with the 1HD2 receptor (ΔG = –8.1 kcal/mol), outperforming both ascorbic acid (–6.1 kcal/mol) and the native ligand (–4.862 kcal/mol). Detailed interaction analysis indicated that YAKRCFR forms stable hydrogen bonds and van der Waals interactions with critical residues such as ILE A119 and PHE A120, contributing to its thermodynamic stability and binding specificity. These findings suggest that YAKRCFR holds promise as a lead compound for further development in peptide-based therapeutic strategies, particularly for targets involving the human peroxiredoxin receptor.
Characterization of Pineapple Peel Activated Carbon (Ananas comosus) as an Iron (Fe) Heavy Metal Adsorbent with NaOH and NH4OH Activators Hasra, Putri Ramadani; Yangti, Ilda ilda; Gusti, Herdi Idriawien; Karneng, Syahdam
Jurnal Beta Kimia Vol 5 No 2 (2025): Volume 5 Number 2, November 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v5i2.23248

Abstract

The purpose of this study was to investigate the effect of strong and weak base activators on the adsorption properties of activated carbon derived from pineapple peel waste. Activated carbon prepared with NaOH and NH₄OH activators exhibited different physical characteristics; NaOH-activated carbon appeared darker and had a rougher texture compared to NH₄OH-activated carbon. The NaOH-activated carbon contained a moisture content of 8.2%, an ash content of 2.22%, and an iodine adsorption capacity of 393.75%. In contrast, the NH₄OH-activated carbon contained a moisture content of 9.9%, an ash content of 2.68%, and an iodine adsorption capacity of 382.41%. Atomic absorption spectrophotometry (AAS) analysis showed an adsorption capacity of 0.17 mg/L for NaOH-activated carbon and 0.18 mg/L for NH₄OH-activated carbon. Fourier Transform Infrared (FTIR) spectroscopy revealed that NaOH-activated carbon contained O–H (hydroxyl), C=C (aromatic), C–H (alkane), C–O (alcohol), and C=H (alkene) functional groups, while NH₄OH-activated carbon exhibited O–H (hydroxyl), C=C (aromatic), C–H (alkane), and C=H (alkene) groups.
Surface Modification of Paper-Based Analytical Devices Using Polymer Inclusion Films as Optical Sensors for The Detection of Cu(II) Ions in Water Ajung, Oktaviani; Tambaru, David; Lapailaka, Titus; Kadang, Luther; Nitti, Fidelis
Jurnal Beta Kimia Vol 5 No 2 (2025): Volume 5 Number 2, November 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v5i2.24436

Abstract

This study presents the development of a microfluidic paper-based analytical device (µPAD) modified with a polymer inclusion film (PIF) for the detection of Cu(II) ions in aqueous samples. The PIF formulation comprised of polyvinyl chloride (PVC), bis(2-ethylhexyl)phosphoric acid (D2EHPA), and Aliquat-336, while sodium zincon salt served as the colorimetric reagent. The optimization was conducted by systematically varying several key parameters such as PIF composition and volume, reaction time, sample volume, and sample pH. The resulting color intensity was digitally quantified using smartphone, and the results were validated against UV–Vis spectrophotometry as the reference method. The optimized conditions were established at a composition of 50% PVC, 30% D2EHPA, 20% Aliquat-336 and 0.1% zincon, with a PIF volume of 20 µL, a reaction time of 40 minutes, a sample volume of 30 µL, and an optimal pH of 5. Under these conditions, the µPAD demonstrated excellent analytical performance, exhibiting strong linearity (R² = 0.9993), high precision (0.36%), good accuracy (0.368%), recovery rates between 98.18% and 102.44%, a limit of detection (LOD) of 0.143 mg/L, and a limit of quantification (LOQ) of 0.476 mg/L. Furthermore, selectivity assessments indicated that D2EHPA effectively reduced interference from Zn(II) ions, confirming the robustness of the developed sensing platform.
Formulation and Evaluation of Balm Stick Preparations from the Essential Oil of Eucalyptus resinifera Leaves Ramadhan, Eka Sujisno; Wulan, Mustika Candra; Marsandah, Marsandah; Abubakar, Andi Nur Fitriani; Agustina, Ayu Safitri; Karneng, Syahdam Safitri; Yuliana, Hasri Safitri
Jurnal Beta Kimia Vol 5 No 2 (2025): Volume 5 Number 2, November 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v5i2.24366

Abstract

Balm is one of the pharmaceutical products with an ointment base that uses essential oils as one of the ingredients in its formulation. One of the essential oils found in Indonesia is Eucalyptus resinifera essential oil. In Indonesia, the use of E. resinifera leaf essential oil in balm stick formulations has not yet been reported. The purpose of this study was to formulate and characterize a balm stick preparation from E. resinifera leaf essential oil for the development of health products. The methods used included the formulation of E. resinifera essential oil balm with four essential oil concentrations (0%, 15%, 20%, and 25%) and evaluation of the preparations through homogeneity, spreadability, adhesion, pH, and skin irritation tests. The results showed that the best formula was Formula III, containing 20% essential oil, which met the requirements for a good balm preparation based on the results of the homogeneity test (homogeneous), spreadability test (3.9 cm), adhesion test (>1 minute), pH test (4.6), and skin irritation test (no irritation observed), and was also the most preferred according to the organoleptic test.
Analysis of Total Hardness Levels in Water Around the Trunojoyo Campus using the Complexometric Method Mubarok, Ibnul; Putri, Nuraida Ameliana
Jurnal Beta Kimia Vol 5 No 2 (2025): Volume 5 Number 2, November 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v5i2.24596

Abstract

Water hardness, primarily caused by dissolved calcium (Ca²⁺) and magnesium (Mg²⁺) ions, affects the suitability of groundwater for domestic use and may have adverse health and operational effects when concentrations are high. Indonesia’s clean water quality standard (PERMENKES No. 492/MENKES/PER/IV/2010) sets a maximum hardness of 500 mg/L as CaCO₃. This study determined the total hardness of well water in three villages surrounding the Universitas Trunojoyo Madura campus (Telang, Gili Timur, and Labang) using complexometric titration with 0.01 M EDTA. Samples were collected by simple random sampling and titrated in triplicate. Results showed pronounced spatial variation: Telang village exhibited very high total hardness average 715.7 mg/L, Gili Timur had moderate hardness 146 mg/L, and Labang had low hardness 101.3 mg/L. The elevated hardness in Telang exceeds the national standard and likely reflects local geology (limestone contact and calcareous soils). We recommend pretreatment of well water used for drinking in areas with very high hardness.

Page 9 of 9 | Total Record : 90

 5   6   7   8   9 

Filter by Year

2021 2025


Reset
Filter By Issues
All Issue Vol 5 No 2 (2025): Volume 5 Number 2, November 2025 Vol 5 No 1 (2025): Volume 5 Number 1, May 2025 Vol 4 No 2 (2024): Volume 4, Nomor 2: November 2024 Vol 4 No 1 (2024): Volume 4, Nomor 1: Mei 2024 Vol 3 No 2 (2023): Volume 3, Nomor 2: November 2023 Vol 3 No 1 (2023): Volume 3, Nomor 1: Mei 2023 Vol 2 No 2 (2022): Volume 2, Nomor 2: November 2022 Vol 2 No 1 (2022): Volume 2, Nomor 1: Mei 2022 Vol 1 No 2 (2021): Volume 1, Nomor 2: November 2021 Vol 1 No 1 (2021): Volume 1, Nomor 1: Mei 2021