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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 CHEDS: Journal of Chemistry, Education, and Science ALSYS : Jurnal Keislaman dan Ilmu Pendidikan MASALIQ: Jurnal Pendidikan dan Sains
Hesty Parbuntari
Universitas Negeri Padang
Religion 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 Social Sciences 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.
Pelatihan Pembuatan Pupuk Organik Cair Limbah Bawang Merah di Nagari Sungai Nanam Hesty Parbuntari; Siska Alicia Farma; Revi Ernanda; Mahmud Mahmud; Sri Benti Etika; Fitri Yuranda; Anwar Saputra; Yulia Rahmatika
ABDI: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 7 No 3 (2025): Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat
Publisher : Labor Jurusan Sosiologi, Fakultas Ilmu Sosial, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/abdi.v7i3.1171

Abstract

Limbah kulit bawang merah yang banyak dibuang oleh petani bisa dimanfaatkan kembali menjadi bahan utama pembuatan Pupuk Organik Cair (POC). Hal ini dikarenakan kulit umbi bawang merah berisi senyawa baik yang dapat berperan sebagai Zat Pengatur Tumbuh (ZPT) ataupun pertumbuhan akar. Ketika masa panen, selama proses penyeleksian bawang merah yang baik dan besar juga dihasilkan limbah berupa kulit dan daun kering yang banyak jumlahnya. Limbah tersebut juga belum dimanfaatkan dan dibuang begitu saja oleh masyarakat karena masih dianggap sampah. Untuk mengatasi masalah ini, tim pengabdi melakukan beberapa tahapan seperti uji skala laboratorium yang dilakukan di laboratorium kimia Universitas Negeri Padang untuk mengetahui zat aktif apa saja yang terkandung dalam POC kulit bawang merah, pemaparan materi oleh narasumber berpengalaman, praktek langsung oleh peserta, monitoring, dan evaluasi yang dilakukan dua kali setelah praktek pembuatan pupuk dan setelah penyemprotan pupuk ke tanaman. Semua tahapan pengabdian ini berlangsung sekitar 8 bulan. Berdasarkan hasil angket yang diberikan kepada mitra, 100% mitra setuju bahwa pelatihan ini bermanfaat dan apabila mereka menggunakan POC maka biaya pembelian pupuk dapat ditekan hingga 50 – 80%. Berdasarkan hasil wawancara langsung, mitra memanfaatkan pupuk yang mereka hasilkan dari kegiatan ini dan menyampaikan bahwa pertumbuhan bawang menunjukkan hasil yang serupa jika dibandingkan dengan ketika mereka menggunakan pupuk komersil. Selain itu, masalah pencemaran lingkungan pascapanen dapat teratasi yang artinya pertanian ramah lingkungan dapat terwujud.
Pengaruh Metode Ekstraksi Maceration Vortex Technique terhadap Total Flavonoid Content dari Daun Meniran (Phyllanthus niruri L.) Miftahul Rahmi; Hesty Parbuntari
MASALIQ Vol 5 No 4 (2025): MASALIQ: Jurnal Pendidikan dan Sains
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6826

Abstract

Phyllanthus niruri L., a medicinal plant from the Phyllanthaceae family, is widely recognized in traditional medicine for its flavonoid content in the leaves, which functions as a natural antioxidant protecting cells from damage caused by free radicals. This study aims to investigate the effect of the Maceration Vortex Technique (MVT) on the total flavonoid content of Phyllanthus niruri leaves. The method involved a 2-hour maceration process followed by 5 minutes of vortexing using 70% ethanol as the solvent. Total flavonoid content was analyzed using UV-Vis spectrophotometry at a maximum wavelength of 431 nm. The results demonstrated that the MVT method yielded a high flavonoid content, indicating the technique's effectiveness in extracting flavonoid compounds from Phyllanthus niruri leaves. The study concludes that MVT is a promising alternative extraction method that is efficient, simple, and applicable for obtaining bioactive compounds from natural sources. These findings have positive implications for the development of antioxidant-rich herbal products derived from natural ingredients.
Pengaruh Metode Ekstraksi Sonikasi terhadap Total Flavonoid Content dari Daun Pare (Momordica charantia L.) Nur Octaviana; Hesty Parbuntari
MASALIQ Vol 5 No 6 (2025): MASALIQ: Jurnal Pendidikan dan Sains
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i6.7822

Abstract

The use of medicinal plants in Indonesia is still largely based on traditional knowledge passed down through generations, often lacking sufficient scientific validation. Momordica charantia L., a plant from the Cucurbitaceae family, is widely recognized in traditional medicine for its flavonoid content found in the leaves, which exhibits antioxidant, antidiabetic, antirheumatic, and antimicrobial properties. This study aims to determine the effect of sonication on the total flavonoid content of pare (bitter melon) leaves. Extraction was carried out using a sonicator for 60 minutes at 40 °C, with a power of 50 W and a frequency of 40 kHz. The filtrate obtained from the filtration process was then evaporated using a rotary evaporator with 70% ethanol as the solvent. The total flavonoid content was determined using a UV-Vis spectrophotometer at a maximum wavelength of 431 nm. The results showed that the sonication method produced a total flavonoid content of 159.42 mg QE/g, which is considered high. These findings indicate that sonication is a fast, efficient, and environmentally friendly extraction method for obtaining flavonoid compounds from Momordica charantia leaves. This study contributes scientifically to the development of modern green technology-based extraction methods for the utilization of local medicinal plants.
SINTESIS AMIL ASETAT DENGAN METODE REFLUKS DAN SONIKASI Mia Baizura; Hesty Parbuntari
CHEDS: Journal of Chemistry, Education, and Science Vol 10, No 1 (2026)
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/cheds.v10i1.13354

Abstract

Penelitian ini bertujuan untuk mensintesis amil asetat melalui reaksi esterifikasi antara amil alkohol dan asam asetat glasial menggunakan asam sulfat sebagai katalis, dengan menggunakan metode refluks dan sonikasi. Penelitian ini dilakukan untuk mengatasi efisiensi rendah dan laju reaksi esterifikasi yang lambat, yang sering membatasi produksi skala industri. Prosedur eksperimental melibatkan refluks reaktan pada suhu 100–120 °C selama 60 menit dan penerapan sonikasi sebagai teknik alternatif untuk mempercepat waktu reaksi dan meningkatkan hasil. Produk yang diperoleh dimurnikan dan dikarakterisasi menggunakan kromatografi lapis tipis (TLC) untuk mengkonfirmasi keberadaan amil asetat. Hasil menunjukkan bahwa kedua metode berhasil menghasilkan amil asetat, dengan sonikasi menunjukkan potensi untuk mengurangi waktu reaksi dibandingkan dengan metode refluks konvensional. Temuan ini menunjukkan bahwa sonikasi dapat menjadi metode alternatif yang efektif dalam sintesis ester, berkontribusi pada proses kimia yang lebih efisien dan ramah lingkungan.
Efektivitas E-LKPD dalam Liveworksheets berbasis Problem Based Learning pada Materi Hukum Dasar Kimia terhadap Kemampuan Pemecahan Masalah Peserta Didik Fase E Annisa Ridho Illahi; Hesty Parbuntari
ALSYS Vol 5 No 4 (2025): ALSYS: Jurnal Keislaman dan Ilmu Pendidikan
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/alsys.v5i4.6561

Abstract

Problem-solving ability is a crucial skill that must be developed to help students navigate increasingly complex challenges. This study aims to determine the effectiveness of using e-LKPD in Liveworksheets integrated with problem-based learning on the topic of basic chemical laws in enhancing students’ problem-solving skills. The research employed a nonequivalent control group design, with a population comprising all Grade X Phase E students at SMA Negeri 3 Padang Panjang (277 students) during the odd semester of the 2024/2025 academic year. A sample of 66 students was selected through purposive sampling, consisting of classes X.E.3 and X.E.4. Data were collected through a problem-solving ability test. The results showed an average N-Gain of 70%, categorized as moderately effective. A hypothesis test was conducted to assess significant improvement after treatment, with normality and homogeneity tests confirming that the data were normally distributed and homogeneous. A t-test at a 0.05 significance level yielded tₕᵢₜᵤₙg (1.8685) > tₜₐᵦₑₗ (1.69), indicating that H₀ is rejected and H₁ is accepted. The study concludes that the use of e-LKPD in Liveworksheets based on problem-based learning significantly improves students’ problem-solving abilities in the topic of basic chemical laws. The implication is that interactive digital media, when integrated with problem-based learning approaches, can serve as an effective strategy for chemistry instruction in the digital era.
Co-Authors Annisa Dewi Pangestuti Annisa Ridho Illahi Anwar Saputra Ayu Insa Fajri Budhi Oktavia Danar Danar Debi Anggaraini Desy Kurniawati Deva Indriyani Dwi Finna Syolendra Edi Nasra Elfanny Delvia Elfanny Delvia Fitri Yuranda Fitria, Yanti Fransiska Adella Intan Apri Resti Mahmud Mahmud Mahmud Mahmud Melati Melati Meri Novia Nurman Mia Baizura Miftahul Khair Miftahul Rahmi Minda Azhar Muhammad Satrio Hutomo Mulia, Melindra Nur Octaviana Rahma Diyan Martha Revi Ernanda 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 Yulia Rahmatika Yusmaita, Eka