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Tinjauan Kinetika Kimia Daya Hambat Minyak Daun Cengkeh (Syzygium aromaticum) dan Hasil Mikroenkapsulasinya Terhadap Eschericia coli Nurliana, Laily -; Kurniawati, Desi; Musta, Rustam; Abdul Kadir, Laode; Dewi, Fitria; Nurjana, Siti
Indonesian Journal of Chemical Research Vol 7 No 2 (2020): Edisi Bulan Januari (Edition for January)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2020.7-lai

The secondary metabolite compounds contained in clove leaves oil have the potential to be antibacterial Escherichia coli. The kinetic analysis is based on the inhibition zone formed as a result of the inhibition of clove leaves oil and the results of microencapsulation on E. coli bacteria. The determination of the inhibition zone uses the disk diffusion method by using amoxicillin as a positive control and tween oil as a negative control. The kinetic review is intended to find out the antibacterial inhibitory reaction process by determining the reaction order (n), rate constant (k) as well as the At-Ao-t relationship of clove leaves oil and the results of its microencapsulation. Based on the research results obtained by the reaction order (n) of clove oil as an antibacterial E. coli is n = 0.1913; with the rate constant k = 5.7679. The reaction order (n) results of microencapsulation as antibacterial E. coli are 0.5039; with the rate constant k = 4.7323.

Kinetika Kimia Antibakteri Fraksi Alkana Alifatik Hasil Pirolisis Cangkang Biji Jambu Mete (CNS) Musta, Rustam; Nurliana, Laily; Andraysno, Andraysno
Indonesian Journal of Chemical Research Vol 7 No 2 (2020): Edisi Bulan Januari (Edition for January)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2020.7-rus

Chemical kinetics research antibacterial of aliphatic alkane fraction from the results of pyrolysis Cashew Nut Shell (CNS) (Annacardium occidentale L.) on Eschericia coli have been carried out. Cashew nuts are prepared by separating the shell and seeds for pyrolysis and purifying using a fractional distillation device. The results of E. coli anti-bacterial activity test from aliphatic alkane fractional distillation results of cashew nut shell pyrolysis products showed that the inhibitory power was different from each concentration variation of 100%, 75%, 50%, 25%, and 12.5%, with inhibitor zone: 8.02; 7.16; 5.56; 4.52 dan 4.26 mm which indicates that the inhibition is weak category for 12.5% and 25%, medium category for 50%, 75% and 100%. The clear zone that has been formed are calculated in terms of its chemical kinetics including the reaction order and the activity rate constant. The reaction order (n) antibacterial of aliphatic alkane fraction from the results of pyrolysis CNS on E. coli was 0.3145 with a constant activity rate of (k) = 1,7791.

Synthesis of Methyl Ester Nitrate from Mahogany Seed Oil (Swietenia mahagoni Linn) Musta, Rustam; Nurliana, Laily; Halulanga, Muh. Mahatir
Indonesian Journal of Chemical Research Vol 9 No 1 (2021): Edition for May 2021
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2021.9-rus

Nitration of methyl ester from mahogany oil (Swietenia mahagoniLinn) can be produced by Methyl Ester Nitrate (MEN), an additive that is useful for increasing Cetane Numbers in diesel fuel. This study aims to determine the yield of MEN that can be produced from mahogany seed oil after esterification, trans-esterification, and nitration and to identify the MEN compounds produced. Mahogany oil is obtained by pressing mahogany seeds and then degumming to remove the gum. Mahogany oil-free gum is esterified using methanol with the mole ratio of oil: methanol (1: 6), then trans-esterified, also using methanol with mole ratio (1:15) and a methyl ester is obtained. Then the methyl ester was nitrated with HNO3, sulfuric acid, and acetic anhydride to obtain a translucent reddish colored MEN product with a yield of 24.99%. The success of the synthesis was shown by the FTIR spectrophotometer in the presence of absorption at 1550 cm-1 which indicated the presence of the C-ONO2 group, the absorption at 1365 cm-1 indicated the presence of the NO2 group, and at 1118 cm-1 indicated the presence of the C-N group. The reaction mechanism that occurs during the predicted nitration reaction is an electrophilic substitution reaction and nucleophilic addition.

Mendesain Modul Ajar Dengan Metode Belajar Berbasis Praktikum IPA SMP Saprin; Damhuri; Jumadin, La; Nurrijal; Musta, Rustam; Takda, Amiruddin
Amal Ilmiah: Jurnal Pengabdian Kepada Masyarakat Vol. 6 No. 1 (2024): Edisi November 2024
Publisher : FKIP Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36709/amalilmiah.v6i1.251

Pendidikan adalah usaha sadar dan terencana untuk mewujudkan suasana belajar dan proses pembelajaran agar peserta didik secara aktif dapat mengembangkan potensi dirinya untuk mengembangkan keterampilan yang diperlukan dirinya. Tujuan kegiatan ini adalah untuk memberikan pengetahuan pada Guru (mitra) dalam menyusun modul ajar / RPP dengan metode belajar berbasis praktikum mata pelajaran IPA SMP. Metode yang digunakan ada 4 cara yaitu (1) metode diklat yaitu memberikan materi penyusunan modul ajar kepada guru, (2) metode mendesain modul ajar/(rpp) yaitu guru menyusun dan merancang modul ajar (rpp) praktikum, (3) metode simulasi praktikum yaitu guru secara langsung melakukan praktikum di laboratorium sesuai modul (RPP) yang didesain, dan (4) metode evaluasi yaitu untuk mengukur pengetahuan, pemahaman dan keterampilan dalam mendasain modul ajar berbasis praktikum. Hasil yang diperoleh menunjukkan adanya peningkatan yang signifikan. Peserta sebelum mengikuti diklat, berada pada rentang nilai skor di bawah 70, sedangkan setelah mengikuti diklat, di atas nilai 80. Kegiatan diklat memberikan dampak positif kepada seluruh peserta dalam mendesain modul ajar dengan metode belajar berbasis praktikum IPA SMP. Keberhasilan mayoritas peserta (57%) sangat memuaskan, 34% memuaskan dan 9% cukup memuaskan. Kagiatan diklat ini sangat bermanfaat bagi peserta dan menambah pengetahuan dalam merancang kegiatan praktikum di sekolah.

The Synthesis of Methyl Ester Nitrate from Ketapang Seed Oil (Terminalia catappa L.) Nurliana, Laily; Ritonga, Halimahtussaddiyah; Feronika, Yulita; Musta, Rustam
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13537

The synthesis of methyl ester nitrate (MEN) from ketapang oil (Terminalia catappa L.) have been carried out. This study aims to determine the yield and the characteristics of MEN. In this study, ketapang seed oil was obtained from the soxhlet extraction process followed by an evaporation process to separate the oil from the solvent. MEN can be produced from ketapang seed oil by esterification to convert all of FFA became ester, followed by transesterification that intended to produce ester from triglycerides and nitrationthat is reaction of esther and HNO3 to create MEN. Evaporated oil is esterified using methanol with a mole ratio of oil: methanol (1: 6), then the transesterification process using methanol with a mole ratio (1:15) gives a yield of 86%. The transesterification product was then nitrated using HNO3 and H2SO4 for 4 hours with a yield of 83%. Characterization of methyl ester using GC-MS characterization showed the presence of methyl palmitoleate (C17H32O2), methyl palmitate (C19H34O2), methyl oleate (C19H36O2), methyl 13-octadecanoic (C19H36O2), methyl stearate (C19H38O2), and methyl 18-nonadecanoic (C21H42O2). Characterization MEN using a FTIR spectrophotometer showed the presence of a C-ONO2 group at wave number 1550 cm-1, NO2 group at wave number 1365 cm-1 and a C-N group at wave number 1118 cm-1. It shows that MEN can be synthesized from ketapang seed oil.

Pengenalan Teknik Dasar Laboratorium terhadap Siswa-Siswi MA Asy-Syafi’iyah Kendari di Laboratorium Unit Kimia UPT Lab. Terpadu Universitas Halu Oleo Nurliana, Laily; Ritonga, Halimatussaddiyah; Sabarwati, Sitti Hadijah; Musta, Rustam
Jurnal Inovasi Pengabdian Masyarakat Pendidikan Vol. 5 No. 2 (2024): Mei 2025
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/jurnalinovasi.v5i2.37381

Implementasi kurikulum merdeka belajar dapat dilakukan dengan kerjasama antara pihak Universitas dan SMA sederajat dalam mencapai cita-cita kebijakan merdeka belajar yaitu mewujudkan pendidikan berkualitas yang berfokus pada pengembangan kompetensi dasar dan pendidikan karakter sesuai profil pelajar Pancasila. Salah satu metode untuk merealisasikan pendidikan yang berkualitas adalah melalui proses metode ilmiah yang dapat dilakukan siswa dalam pembelajaran kimia dengan sarana laboratorium kimia. UPT Laboratorium Terpadu Unit Laboratorium Kimia UHO melakukan kerjasama dengan MA Asy-Syafi’iyah Kendari dalam rangka memberikan pengalaman kepada siswa tentang bagaimana melakukan praktikum di Laboratorium sebagai implementasi kurikulum merdeka belajar. Metode yang digunakan dalam kegiatan ini adalah metode ekspositori (ceramah) dan demonstrasi (praktikum), serta evaluasi menggunakan pre-test dan post-test. Setelah pelaksanaan kegiatan pengabdian ini dapat disimpulkan bahwa kegiatan pengabdian ini berjalan dengan baik dan memberikan manfaat bagi para siswa-siswi MA Asy-Syafi’iyah Kendari sebagai peserta dalam menambah pengetahuan tentang materi praktikum pengenalan alat bahan, pembuatan larutan dan reaksi asam basa. Hal tersebut dapat terlihat dari hasil analisis n-Gain sebesar 0,32 dimana nilai tersebut masuk dalam kategori lompatan nilai sedang yang menunjukkan bahwa pelatihan cukup memperlihatkan dampak yang signifikan.

The Synthesis of Methyl Ester Nitrate from Ketapang Seed Oil (Terminalia catappa L.) Nurliana, Laily; Ritonga, Halimahtussaddiyah; Feronika, Yulita; Musta, Rustam
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13537

The synthesis of methyl ester nitrate (MEN) from ketapang oil (Terminalia catappa L.) have been carried out. This study aims to determine the yield and the characteristics of MEN. In this study, ketapang seed oil was obtained from the soxhlet extraction process followed by an evaporation process to separate the oil from the solvent. MEN can be produced from ketapang seed oil by esterification to convert all of FFA became ester, followed by transesterification that intended to produce ester from triglycerides and nitrationthat is reaction of esther and HNO3 to create MEN. Evaporated oil is esterified using methanol with a mole ratio of oil: methanol (1: 6), then the transesterification process using methanol with a mole ratio (1:15) gives a yield of 86%. The transesterification product was then nitrated using HNO3 and H2SO4 for 4 hours with a yield of 83%. Characterization of methyl ester using GC-MS characterization showed the presence of methyl palmitoleate (C17H32O2), methyl palmitate (C19H34O2), methyl oleate (C19H36O2), methyl 13-octadecanoic (C19H36O2), methyl stearate (C19H38O2), and methyl 18-nonadecanoic (C21H42O2). Characterization MEN using a FTIR spectrophotometer showed the presence of a C-ONO2 group at wave number 1550 cm-1, NO2 group at wave number 1365 cm-1 and a C-N group at wave number 1118 cm-1. It shows that MEN can be synthesized from ketapang seed oil.

The Effect of the Implementation of Project Based Learning (PjBL) in Improving the Cognitive Learning Outcomes on the Material of Atomic Structure Sukmaningsih, Gusti Ayu Diah; Fahyuddin, Fahyuddin; Musta, Rustam
The Future of Education Journal Vol 5 No 1 (2026)
Publisher : Lembaga Penerbitan dan Publikasi Ilmiah Yayasan Pendidikan Tumpuan Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61445/tofedu.v5i1.1558

This study aimed to analyze students’ cognitive learning outcomes taught using the Project Based Learning (PjBL) model compared to direct instruction, examine the effect of PjBL on improving cognitive learning outcomes on atomic structure material, and describe students’ responses to the PjBL implementation. The research employed a quasi-experimental method with a Control Group Pretest–Posttest design. The subjects were 62 tenth-grade students of SMA Negeri 12 Kendari in the 2025/2026 academic year, consisting of 31 students in the experimental class and 31 students in the control class. The instruments used were a cognitive learning outcomes test and a student response questionnaire. Data were analyzed using inferential statistical tests. The results showed that the experimental class achieved a higher average cognitive score of 82.90 (very good category) compared to the control class, which obtained an average score of 73.23 (good category). The independent sample t-test revealed a significance value of 0.001 (< 0.05), indicating that the PjBL model significantly improved students’ cognitive learning outcomes. Students’ responses toward the PjBL model were also very positive, with an average percentage of 80.13%. These findings indicate that the PjBL model is effective in teaching atomic structure material to enhance students’ cognitive learning outcomes .

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