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All Journal CHEMPUBLISH JOURNAL Buletin Pengabdian Multidisiplin
Hariyani, Septi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Engineering Social Sciences

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Penerapan Model Problem-Based Learning untuk Meningkatkan Kemampuan Berpikir Kritis Hariyani, Septi
Buletin Pengabdian Multidisiplin Vol. 1 No. 1 (2023): Buletin Pengabdian Multidisiplin Mei 2023
Publisher : Piramida Akademi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62385/budimul.v1i1.97

Abstract

Tujuan – Penelitian ini  bertujuan  untuk  mendeskripsikan  penerapan  problem  based  learning  sebagai  upaya meningkatkan  kemampuan  berpikir  kritis  siswa  pada  mata  pelajaran IPA, materi Perkembangbiakan Tumbuhan Kelas VI SD Negeri Tegaljeruk  Tahun Pelajaran 2022/2023 Metode – Metode yang digunakan oleh peneliti dalam studi ini adalah metode kualitatif deskriptif. Penelitian kualitatif adalah penelitian yang menghasilkan data deskriptif, yaitu melakukan observasi terhadap ucapan atau tulisan dan perilaku orang-orang yang diamati. Sesuai konteks  yang teramati,  data  yang  diperoleh kemudian  dicatat  dan  dianalisis.  Hasil – Salah  satu keunggulan   dari   model pembelajaran   problem   based   learning   yaitu   mampu   melatih   siswa   dalam menggunakan  berbagai  konsep,  prinsip  dan  keterampilan  yang  telah  mereka  pelajari  untuk  memecahkan permasalahan yang sedang dihadapi. Dengan penerapan problem based learning, kemampuan berpikir kritis dapat berkembang, karena pada kemampuan berpikir kritis yang diamati dalam penelitian ini berupa kemampuan mengidentifikasi,  menganalisis,  memecahkan  masalah,  berpikir  logis,  membuat  keputusan  dengan  tepat serta  dapat  menarik  kesimpulan
Pengembangan Mouth Nanospray Minyak Atsiri Biji Jintan Hitam (Nigella sativa L.) : Sifat Fisik, Stabilitas, dan Aktivitas Antibakteri Rahayu, Milda; Hariyani, Septi; Lestari, Uce
Chempublish Journal Vol. 10 No. 1 (2026): Chempublish Journal
Publisher : Department of Chemistry, Faculty of Science and Technology Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v10i1.48881

Abstract

Halitosis is one of the oral health problems that is quite high in prevalence and can reduce the quality of life of sufferers. This study aims to formulate and evaluate the physical quality, characteristics of nanoparticles, and antibacterial activity of mouth nano spray containing black cumin essential oil (Nigella sativa L.). The formulation is made in four variations of essential oil concentration (F1 0.25%; F2 0.5%; F3 1%; F4 1.5%) using the nanoemulsion method. Physical quality evaluation included organoleptic, pH, homogeneity, and viscosity tests, while nanoparticle characterization was carried out using a Particle Size Analyzer (PSA). Antibacterial activity was tested against Streptococcus mutans using disc diffusion method. The results show that all formulas have good physical properties with a liquid, clear, and homogeneous form. The pH value is in the range of 6–6.7 which corresponds to the pH of the mouth. The PSA test on F3 yielded a particle size of 42.7 nm with a PDI of 0.6, but a potential zeta value of –5.6 μV indicated low electrostatic stability. The antibacterial activity test showed that F2, F3, and F4 had strong inhibition with inhibition zone diameters of 11.78 mm, 11.57 mm, and 13.10 mm, respectively, higher than positive controls (8.39 mm). Based on these results, the F4 formula with a concentration of 1.5% provides the most optimal antibacterial activity.
Co-Authors Rahayu, Milda Uce Lestari