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All Journal SEMIRATA 2015 Journal of Aceh Physics Society Indonesian Journal of Chemistry Journal of Physics and Its Applications Walisongo Journal of Chemistry Risalah Fisika Jurnal Natural Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education) Grimsa Journal of Science Engineering and Technology
Nasrullah Idris
Jurusan Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Syiah Kuala,Jl. Syech Abdurrauf No. 3 Darussalam, Banda Aceh 23111, Aceh, Indonesia
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Engineering Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Neuroscience Physics Other

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PENERAPAN MODEL PROBLEM BASED LEARNING (PBL) PADA KONSEP USAHA DAN ENERGI UNTUK MENINGKATKAN KETERAMPILAN BERPIKIR KRITIS DAN BERPIKIR KREATIF SISWA SMA Siska Sucirahayu; Abdul Halim; Nasrullah Idris
Jurnal Pendidikan Sains Indonesia Vol 3, No 1 (2015): April 2015
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (109.565 KB)

Abstract

Penelitian ini bertujuan untuk mengetahui aktifitas guru, meningkatkan keterampilan berpikir kritis dan berpikir kreatif siswa setelah diterapkan model PBL, mengetahui tanggapan siswa. Penelitian ini menggunakan metode pre-eksperimental dan one-group pretest-posttest design.Sampel penelitian diambil secara acak dari seluruh siswa kelas XI sebanyak 25 orang dari satu kelas. Pengumpulan data menggunakan instrumen keterampilan berpikir kritis dan berpikir kreatif,  pedoman observasi, angket siswa. Hasil penelitian menunjukkan bahwa aktifitas guru pada saat diterapkan model PBL menunjukkan kategori baik dan sangat baik, penerapan PBL mampu meningkatkan keterampilan berpikir kritis dan kreatif dengan kategori sedang, hampir seluruh siswa memberikan tanggapan positif atau setuju dengan penerapan PBL pada konsep usaha dan energi.
PREPARATION OF INORGANIC CATALYST BASED HEMATITE (a-Fe2O3) COMPOUND EXTRACTED FROM ACEH IRON ORE MINERAL AND ITS CATALYTIC ACTIVITY ON TRANSESTERIFICATION OF COCONUT OIL Muliadi Ramli; Anneza Astriet; T. Banta Darmawan; Saiful Saiful; Susilawati Susilawati; Nasrullah Idris
Jurnal Natural Volume 19, Number 1, February 2019
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v19i1.12855

Abstract

Hematite (Fe2O3) was successfully extracted from the Aceh iron ore mineral by precipitation method with employing sulphuricacid (H2SO4) as chemical agent.  Furthermore, the extracted hematite was modified with sodium metal (K), namely it doped with NaOH of 5% and 10% (w/w), respectively. Based on the characterization results using XRD and SEM- EDS proved that modified catalyst (Na2O/Fe2O3) with their homogeneous size were resulted while the hematite (Fe2O3) particles was dopped withNaOH at its low concentration of (5% wt/wt), however while doping with the higher concentration of NaOH (10% w/w), agglomeration was taken place among the catalyst particles in which decreasing the surface area of the modified catalysts. Finally, the modified catalyst (Na2O/Fe2O3) was successfully applied as an inorganic catalyst on transesterification of coconut oil and methanol (T = 55 – 60oC, 2 h)for forming methyl esters asbiodiesel compounds. 
Assessment of Al3+ Ion Selectivity Coefficient (Kij) in Polyurethane Membranes Derived from Castor Oil (Ricinus communis. L) via Separated Solution Method Jannah, Firaihanil; Idroes, Rinaldi; Nazaruddin, Nazaruddin; Idris, Nasrullah; Safitri, Eka; Md Sani, Nor Diyana
Grimsa Journal of Science Engineering and Technology Vol. 1 No. 2 (2023): December 2023
Publisher : Graha Primera Saintifika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61975/gjset.v1i2.18

Abstract

The influence of foreign ions on the response of Al3+ ISE-based polyurethane membranes from castor oil has been determined using SSM. The results showed that the presence of the foreign ions tested did not affect the sensitivity and response of Al3+ ISE. The influence of foreign ions Na+, K+, Li+, Pb2+, Ca2+, Co2+, Cu2+, Ni2+, Cr3+, and Fe3+ on the selectivity of ion-selective electrodes (Al3+ ISE) in the concentration range 1x10-9 – 1x10-4 M has been performed using separate methods. The results show that the presence of foreign ions does not affect the performance of Al3+ ISE with a Kij value < 1. The selectivity sequence of foreign ions is Fe3+ > Cr3+ > Pb2+ > Cu2+ > Ni2+ > Co2+ > Ca2+ > Li+ > Na+ > K+ respectively.
INORGANIC OXIDE SYNTHESIS FROM ACEH BOVINE BONE USING THE PRECIPITATION METHOD FOR BIOMASS TRANSESTERIFICATION Amlia, Nisa; Ramli, Muliadi; Rossani, Ratu Balqis; Mitaphonna, Rara; Lubis, Surya; Idris, Nasrullah; Saiful, Saiful; Fathurrahmi
Walisongo Journal of Chemistry Vol. 8 No. 2 (2025): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v8i2.28937

Abstract

Inorganic oxide nanoparticles synthesized from Aceh bovine bone were successfully prepared using the precipitation method, with pH variations of 8 and 10 adjusted using NH₄OH as the precipitating agent and pH regulator. The resulting nanocatalysts were characterized using XRD, FTIR, and SEM-EDX, and their catalytic activity was evaluated through the transesterification of RBDPO. XRD and FTIR analyses confirmed the presence of hydroxyapatite (Ca₁₀(PO₄)₆(OH)₂), calcium oxide (CaO), and calcium carbonate (CaCO₃) as the main components in catalysts synthesized at pH 8 and pH 10. SEM micrographs revealed spherical particle morphologies, while EDX analysis showed calcium as the dominant element, with contents of 55.44% and 57.19%, respectively. The average crystallite sizes, calculated using the Debye–Scherrer equation, were 31.63 nm (CB-P8C) and 31.31 nm (CB-P10C). Catalytic activity tests demonstrated that the catalyst synthesized at pH 10 exhibited higher performance, achieving a biodiesel yield of 98.11%, compared to 92.66% for the catalyst synthesized at pH 8. Quality assessment of both biodiesel samples confirmed that their acid values, density, and viscosity met the Indonesian National Standard (SNI 04-7182-2015). This approach highlights a sustainable pathway for converting biowaste into efficient catalysts for green fuel production.
Co-Authors A Halim Abdullah . Adi Rahwanto Ali Khumaeni Amlia, Nisa Anak Agung Istri Sri Wiadnyani Anneza Astriet Arlin Maya Sari Asep Yoyo Wardaya Eka Safitri Fathurrahmi Heri Sugito Jannah, Firaihanil Kiichiro Kagawa Maswati Maswati Md Sani, Nor Diyana Mitaphonna, Rara Muliadi Ramli Muliadi Ramli N. Nazaruddin Rinaldi Idroes Rossani, Ratu Balqis Saiful Saiful Saiful Saiful Siska Sucirahayu Surya Lubis Susilawati Susilawati T. Banta Darmawan T. N. Usmawanda Yunita .