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All Journal Jurnal Periodic Jurusan Kimia UNP Auladuna Eksakta : Berkala Ilmiah Bidang MIPA Menara Ilmu Pelita Eksakta Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat Stannum : Jurnal Sains dan Terapan Kimia
Hesty Parbuntari
Universitas Negeri Padang
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Energy Engineering Environmental Science Health Professions Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Other

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Pengaruh pH dan Konsentrasi Terhadap Penyerapan Ion Logam Pb2+ Menggunakan Kulit Buah Matoa (Pometia pinnata) Deva Indriyani; Edi Nasra; Budhi Oktavia; Hesty Parbuntari; Desy Kurniawati
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.117509

Abstract

This research study was to determine the optimum conditions for the absorption of Pb2+ metal ions using the matoa fruit peel (Pometia pinnata) using the batch method with variations in pH, concentration, particle size, contact time and stirring speed. The results of the study showed that the optimum conditions for the absorption of Pb2+ occurred at pH 5, a concentration of 300 ppm with an absorption capacity of 34.015 mg/g. Pb2+ metal adsorption isotherm with matoa skin biosorbent (Pometia pinnata) tends to follow the Freundlich isotherm equation with a determinant coefficient (R) of 1.Keywords : Biosorption, Pb2+ metal, Pometia pinnata, Batch method
DEVELOPMENT OF LECTORA INSPIRE ASSISTED LEARNING MEDIA TO IMPROVE STUDENTS' CRITICAL THINKING SKILLS Mahmud; Hesty Parbuntari; Vini Wela Septiana; Debi Anggaraini
Auladuna: Jurnal Pendidikan Dasar Islam Vol 11 No 1 (2024): JUNE
Publisher : Department of Pendidikan Guru Madrasah Ibtidaiyah Universitas Islam Negeri Alauddin Makass

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/auladuna.v11i1a7.2024

Abstract

Abstract Researchers are concerned about the low level of critical thinking of students in Indonesia and its impact on current generations. Solve this issue, there is a need to develop innovative and interactive learning media using lectora inspire in order to meet the demands of 21st-century learning. This research used the 4D development model (Define, Design, Develop, and Dissemination) and involved grade V elementary school students in West Sumatera province. The developed learning media was assessed for feasibility through tests on media, content, language, and practicality. The results indicated that the interactive learning media assisted by lectora inspire effectively enhanced the critical thinking skills of elementary school students. Experts deemed the media feasible in terms of content, language, and usability. The implementation of lectora inspire-based learning media is seen as a creative and reflective solution to tackle the challenges of the 21st century.
Utilization Analysis of the Ethyl Acetate Fraction of Cumin Leaves (Plectranthus amboinicus) as an Antimicrobial against Staphylococcus aureus using LC-MS Rahma Diyan Martha; Ayu Insa Fajri; Danar Danar; Siti Nurriyatul Kholifah; Hesty Parbuntari
Stannum : Jurnal Sains dan Terapan Kimia Vol 6 No 2 (2024): October 2024
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v6i2.4528

Abstract

The research investigates the antibacterial potential of cumin leaves due to their rich composition of flavonoid compounds, alkaloids, saponins, and tannins. The study's objectives encompass assessing the antibacterial efficacy of cumin leaf's ethyl acetate fraction against Staphylococcus aureus bacteria, identifying the concentration of this fraction yielding the most substantial inhibition zone, and characterizing the compound composition within the fractionated cumin leaf extract. Extraction involved maceration using 96% ethanol and fractionation through water, n-hexane, and ethyl acetate solvents. The ethyl acetate fraction's phytochemical screening affirmed the presence of flavonoids, alkaloids, saponins, and tannins. Liquid chromatography-mass spectrometer (LC-MS) analysis pinpointed the top two peaks as flavonoid compounds. Antibacterial assessments, executed via paper disc diffusion method, employed concentrations of 15%, 20%, and 25% of the ethyl acetate cumin leaf extract against Staphylococcus aureus, each repeated thrice. The 20% concentration exhibited the most substantial inhibition zone, averaging 23.1mm, compared to 16.8mm for 15% and 19.6mm for 25%, indicating its optimal efficacy against S. aureus growth. Statistical analysis employing ANOVA testing underscored the significance of the ethyl acetate cumin leaf fraction's concentration variations on S. aureus, as evidenced by a p-value of 0.00 (below the significance threshold of 0.05). This underscores the impact of the ethyl acetate cumin leaf fraction's concentrations on inhibiting S. aureus growth. The findings shed light on the potential of cumin leaves as a source of antimicrobial agents, with the 20% ethyl acetate fraction exhibiting notable effectiveness, opening avenues for further exploration and applications in antibacterial research.
Co-Authors Annisa Dewi Pangestuti Ayu Insa Fajri Budhi Oktavia Danar Danar Debi Anggaraini Desy Kurniawati Deva Indriyani Dwi Finna Syolendra Edi Nasra Elfanny Delvia Elfanny Delvia Fitria, Yanti Fransiska Adella Intan Apri Resti Mahmud Mahmud Melati Melati Meri Novia Nurman Miftahul Khair Minda Azhar Muhammad Satrio Hutomo Mulia, Melindra Rahma Diyan Martha Rizki Gunawan RR. Ella Evrita Hestiandari Siti Nurriyatul Kholifah Sri Benti Etika Sri Benti Etika Syamsi Aini Ulianas, Alizar Vini Wela Septiana Watin Dehistora Yona Prestica Yulia Mona Liza Yusmaita, Eka