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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Pendidikan Kimia Indonesia Jurnal Entropi Biology, Medicine, & Natural Product Chemistry Jurnal Tadris Kimiya Indonesian Journal of Chemistry Chemistry Indonesian Journal of Chemical Research AR-RAZI Jurnal Ilmiah Jurnal Kartika Kimia Jambura Journal of Educational Chemistry Jambura Journal of Chemistry JCER (Journal of Chemistry Education Research) Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Acta Chimica Asiana Hydrogen: Jurnal Kependidikan Kimia Indonesian Journal of Pharmaceutical Education Indonesian Journal of Chemistry and Environment JURNAL KIMIA SAINTEK DAN PENDIDIKAN Jurnal Manusia dan Lingkungan Molekul: Jurnal Ilmiah Kimia Algoritma: Jurnal Matematika, Ilmu Pengetahuan Alam, Kebumian dan Angkasa Jurnal Sains dan Kesehatan Damhil: Jurnal Pengabdian kepada Masyarakat Jurnal Pendidikan Kimia, Fisika dan Biologi
Akram La Kilo
Universitas Negeri Gorontalo
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Public Health Social Sciences Other

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Studi Kestabilan Zirkonia Terdoping Kation Trivalen melalui Pemodelan Atomistik Akram La Kilo; Triwahyuni S. Umamah; Lukman A. R. Laliyo
Jurnal Kimia Sains dan Aplikasi Vol 22, No 4 (2019): Volume 22 Issue 4 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2640.229 KB) | DOI: 10.14710/jksa.22.4.129-135

Abstract

The aim of this research was to study the stability of the structure of the ZrO2 doped with trivalent oxide Zr1-xMxO2-δ (M = La3+, Nd3+, Sm3+, Eu3+, Gd3+, Y3+, Er3+, Yb3+ and Lu3+ through atomistic modelling and bond valence sum method. Short range potential used in this study was Buckinghams’ potential. Result of geometry optimization at constant pressure shown both cell parameters of ZrO2 was in good agreement with experimental results because of the difference was only 0.11%. Increasing the concentration and the size of substituting dopant of ZrO2 makes the lattice energy of the doped structure was more positive so that the stability of the doped ZrO2 structure decreases. The decrease in the stability of ZrO2 doped with Y3+, Er3+, Yb3+ and Lu3+was smaller than ZrO2 doped with La3+, Nd3+, Sm3+, Eu3+ and Gd3+. BVS results shown that the structure of ZrO2 doped with La3+was not appropriate because it has different value of BVS was more than 0.1
Study on Content of Nitrogen, Phosphorus, and Potassium from Mixed Waste of Empty Fruit Bunch of Oil Palm and Banana Stem as Organic Fertilizer for Tomato Plants Akram La Kilo; Sarmini A Iladat; Hendri Iyabu
Indonesian Journal of Chemistry and Environment Vol 6, No 1 (2023): JUNE 2023
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijoce.v6i1.61232

Abstract

The purpose of this research was to study the levels of nitrogen, phosphorus, and potassium (NPK) contained in organic fertilizer made from a mixture of empty fruit bunch waste from oil palm and banana stems, as well as to determine the effects on the growth and development of tomato plants when applying the organic fertilizer made from the aforementioned mixture. The research involved analyzing the total nitrogen content using the Kjeldahl method, phosphorus (P) using UV-VIS, and potassium (K) using AAS, as well as conducting tomato planting experiments using a growing medium consisting of compost made from the mixture of empty fruit bunch waste from oil palm and banana stems. Based on the research results, it was found that the NPK content of the soil and compost mixture of empty fruit bunch waste from oil palm and banana stems met the SNI 19-7030-2004 standard for nitrogen (N) and phosphorus (P). The growth and development of tomato plants without using the organic fertilizer mixture from the mixture of empty fruit bunch waste from oil palm and banana stems underwent some changes, but the changes occurred at a slower pace compared to using the organic fertilizer mixture from the aforementioned mixture.
Identifikasi Pemahaman Konsep Siswa Pada Materi Ikatan Kimia Menggunakan Tes Diagnostik Three Tier Multiple Choice Ahmat Sudir Umar; Astin Lukum; Windi Dilapanga; Akram La Kilo; La Ode Aman; La Alio; Kostiawan Sukamto; Abdul Wahab Pahrun
Jambura Journal of Educational Chemistry Vol 5, No 1 (2023): Februari
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/jjec.v5i1.18984

Abstract

Penelitian ini bertujuan untuk mengidentifikasi pemahaman konsep siswa pada materi ikatan kimia kelas XI IPA SMA N 1 Telaga Biru. Metode penelitian yang dilakukan adalah kualitatif deskriptif. Instrument yang dilakukan adalah tes diagnostik Three Tier Multiple Choice. Subjek penelitian yang digunakan adalah kelas XI IPA SMA Negeri 1 Telaga Biru dengan jumlah sampel sebanyak 76. Data penelitian diperoleh dari jawaban siswa pada soal tes Three Tier Multiple Choice. Data tersebut diolah berdasarkan pola jawaban siswa yang dikelompokan kedalam tiga kategori yaitu Paham Konsep, Tidak Paham Konsep dan Miskonsepsi. Pada hasil penelitian menunjukan bahwa kategori kemampuan pemahaman konsep memiliki presentase yang paham konsep sebesar 15, Tidak Paham Konsep sebesar 27 dan Miskonsepsi diperoleh presentase sebesar 58. Berdasarkan presentase ditemukan bahwa pengetahuan siswa kelas XI IPA SMA Negeri 1 Telaga Biru termasuk pada kategori Miskonsepsi dengan kriteria tinggi.
Evaluation of gold (au) particle distribution in Grasberg mine material of Freeport Indonesia: fire assay approach Akram La Kilo; Ishak Isa; Muhammad Taufiq Nur
Acta Chimica Asiana Vol. 6 No. 2 (2023)
Publisher : The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v6i2.165

Abstract

Freeport Indonesia is one of Freeport-McMoRan Copper & Gold Inc. affiliate companies. Freeport Indonesia conducted a series of mining and exploration processes for ore containing gold, silver, and copper. Grasberg is the mining location in PT Freeport, Indonesia. This research aimed to determine the distribution of gold (Au) particles in Grasberg rock samples with relatively high gold content. The method used for analyzing the gold content was Fire Assay. The research results indicated that the sample size affected the gold distribution in Grasberg Mine samples. An uneven distribution tendency of gold was observed in the distribution comparison of Splitter and Screen variations with normal Au content.
STUDI HKSA SENYAWA ANALOG QUINOLON-4(1H)-IMINE SEBAGAI ANTIMALARIA MENGGUNAKAN PERHITUNGAN HARTHREE-FOCK Jafar La Kilo; Akram La Kilo
Jambura Journal of Chemistry Vol 4, No 1 (2022): February
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/jambchem.v4i1.20008

Abstract

Penelitian ini bertujuan untuk melakukan studi hubungan kuantitatif struktur-aktivitas (HKSA) terhadap senyawa analog Quinolon-4(1H)-imine sebagai agen antimalaria. Pendekatan HKSA digunakan untuk menghubungkan aktivitas biologi molekul dengan deskriptor yang dihasilkan dari perhitungan menggunakan metode kimia kuantum Harthree-Fock Sebanyak 22 senyawa turunan Quinolon-4(1H)-imine digunakan sebagai bahan kajian, dengan perhitungan deskriptor elektronik dan molekul yang berpengaruh terhadap aktivitas antimalaria. Model HKSA dianalisis menggunakan metode regresi linear berganda (MLR) dan delapan model persamaan HKSA terbaik dihasilkan. Model-model tersebut kemudian divalidasi dan model terbaik dipilih berdasarkan parameter statistik yang signifikan. Rancangan senyawa usulan juga dilakukan berdasarkan model terbaik, dengan mengganti substituen pada senyawa turunan Quinolon-4(1H)-imine. Hasil penelitian ini dapat memberikan kontribusi dalam pengembangan obat antimalaria baru dengan pendekatan teoritik dan pemodelan, sehingga dapat mengurangi biaya dan waktu yang diperlukan dalam penemuan dan pengembangan obat antibiotik baru.
PEMODELAN KONDUKTIVITAS ION DALAM STRUKTUR Li2Sc3(PO4)3 (Modeling Ionic Conductivity in Li2Sc3(PO4)3 Structure) Akram La Kilo; D. Mazza
Jurnal Manusia dan Lingkungan Vol 18, No 3 (2011): November
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jml.18439

Abstract

ABSTRAKFasa Li2Sc3(PO4)3 merupakan material konduktor superionik yang dapat diaplikasikan sebagai baterai yang dapat diisi ulang (rechargeable). Ion Li+ dalam struktur Li2Sc3(PO4) dapat mengalami migrasi dari posisi terisi ke posisi kosong. Penelitian ini telah memodelkan migrasi ion Li+ dalam struktur Li2Sc3(PO4) dengan menggunakan metode bond valence sum (BVS). Metode ini dapat memprediksi bilangan oksidasi suatu atom berdasarkan jarak dengan atom-atom tetangga. Source code berbasis BVS yang digunakan adalah JUMPITER yang mensimulasi efek gaya listrik eksternal yang bertindak pada ion litium sehingga nilai BVS litium dapat dipetakan terhadap jarak. Hasil simulasi menunjukkan bahwa konduksi ion Li+ dapat terjadi pada arah [010], [101], dan [120]. Namun, lintasan konduksi ion Li+ lebih mudah terjadi pada arah [120] atau bidang ab dengan nilai maksimum BVS adalah 0,982.ABSTRACTg-phase of Li2Sc3(PO4)3 is a lithium super ionic conductor which can be applied as a rechargeable lithium battery. Lithium ions of g-Li2Sc3(PO4)3 can migrate from occupied site to vacant site. In this research, simulation of Li+ ions migration in the structure of g-Li2Sc3(PO4)3 carried out using bond valence sum (BVS) to predict the oxidation state of Li+ion based on the distance of the ion to neighboring atoms. BVS-based code used JUMPITER to simulate the effect of external electrical force acting on the lithium ions to produce the lithium BVS value which can be mapped to the distance. The simulation results shows that Li+ ion conduction can be occurred on [010], [101], and [120] directions. However, the Li ion conduction pathway occur more easily in the direction of [120] or ab plane with the BVS maximum value is 0.982.
Atomistic Simulation of La and Mn-Doped PbBi2Nb2O9 Aurivillius Phase Akram La Kilo; Ramona Nintias R. Abas; Alberto Costanzo; Daniele Mazza; Deasy N Botutihe; Jafar La Kilo
Molekul Vol 17 No 2 (2022)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2022.17.2.6346

Abstract

This study aims to determine the effect of Mn3+ and La3+ dopants on the structure of PbBi2Nb2O9 (PBN) using atomistic simulation. PBN phase geometry was optimized before the Mn3+ and La3+-doped phase. Mn3+ partially substituted octahedral Nb5+ in the perovskite layer. While La3+partially substituted Bi3+ in the bismuth layer and dodecahedral Pb2+in the perovskite layer. The concentration (x) of dopants that doped PBN was made in such a way that it produces a phase of Pb1-2xBi1.5 + 2xLa0.5Nb2-xMnxO9 (x = 0, 0.1, and 0.3) which was not charged. The simulation results showed that the optimized PBN cell parameters were in a good agreement with the experimental result. Increasing the concentration of dopants result in the Pb1-2xBi1.5+ 2xLa0.5Nb2-xMnxO9 phase (PBNM-Bi and PBNM-A) being less stable, as indicated by the increased lattice energy. PBNLM-Bi structures experiences an elongation which was showed by the cell parameters of c increase while a and b decrease. La3+prefers to occupy bismuth oxide layer rather than the dodecahedral A-site of the perovskite layer. The results of this simulation can explain the PBLNM structure of experimental results that do not pay attention to the multiplicity of doped PBN with certain dopant concentrations.
Analisis Motivasi Belajar pada Materi Asam Basa Selama Masa Pandemi Covid-19 Hardianti Daing; Akram La Kilo; Hendri Iyabu; La Alio
Jambura Journal of Educational Chemistry Vol 4, No 1 (2022): Februari
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/jjec.v4i1.13240

Abstract

Penelitian ini bertujuan untuk mengetahui motivasi belajar pada materi asam basa siswa kelas XI di SMA Negeri 1 Gorontalo selama masa pandemi Covid-19. Penelitian kualitatif deskriptif ini dilakukan pada siswa kelas XI di SMA Negeri 1 Gorontalo. Responden penelitian 150 siswa. Instrumen yang digunakan adalah quesioner dengan wawancara motivasi belajar intrinsik dan motivasi belajar ekstrinsik siswa. Hasil penelitian ditemukan motivasi belajar intrinsik dan ekstrinsik siswa secara keseluruhan memiliki tiga kategori yaitu kategori sangat tinggi, tinggi dan cukup tinggi, untuk aspek motivasi belajar intrinsik siswa yaitu keinginan diri sebesar 84%, kepuasaan sebesar 87%, kebiasaan baik sebesar 84% dan kesadaran sebesar 80%. Untuk rata-rata dari motivasi belajar intrinsik siswa memperoleh nilai 84% dengan kategori sangat tinggi sedangkan untuk aspek motivasi belajar ekstrinsik siswa yaitu pujian sebesar 81%, nesehat sebesar 85%, semangat sebesar 82%, hadiah sebesar 77%, hukuman sebesar 79% dan meniru sesuatu sebesar 86%. Untuk rata-rata dari motivasi belajar ekstrinsik siswa memperoleh nilai 82% dengan kategori tinggi.
Analisis Kemampuan Berpikir Kreatif Siswa pada Materi Sel Volta dan Sel Elektrolisis dengan Menggunakan Tes Open-Ended Problem Erni Mohamad; Hendri Iyabu; Wiwiyani Wiwiyani; Mangara Sihaloho; Nurhayati Bialangi; Akram La Kilo
Jambura Journal of Educational Chemistry Vol 5, No 2 (2023): Agustus
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/jjec.v5i2.14492

Abstract

This study aims to determine students' creative thinking abilities in the topics of voltaic cells and electrolysis by using open-ended problem tests at SMA Negeri 4 Gorontalo, to understand teachers' responses to the administered open-ended problem tests, and to gauge students' responses to the administered open-ended problem tests. The research approach employed is descriptive qualitative. The subjects of this study were 62 twelfth-grade science students and 2 chemistry teachers at SMA Negeri 4 Gorontalo. The data utilized in the study consist of the results of students' creative thinking ability tests using open-ended problem tests, as well as the responses gathered from questionnaires regarding the test item model. The research findings reveal that students' creative thinking abilities in terms of fluency aspect are at 47.8% categorized as moderately creative, the flexibility aspect at 45.4% categorized as moderately creative, and the originality aspect at 31.9% categorized as less creative. The results from the teachers' questionnaire responses regarding the open-ended problem test model show a positive response rate of 80%, while the results from the students' questionnaire responses indicate a positive response rate of 61%.
Evaluation of Nitrogen, Phosphorus, and Potassium Levels in Rice Straw Compost for Sweet Corn Growth in Gorontalo La Kilo, Akram; Djafar, Yuliyanti Wahab; Iyabu, Hendri
Jambura Journal of Chemistry Vol 5, No 2 (2023): August
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/jambchem.v5i2.14720

Abstract

This study aims to determine the NPK nutrient content of a mixture of soil and straw compost. -The determination of nitrogen, phosphorus, and potassium levels was carried out using the Kjeldahl method, UV-Vis, and AAS instrument, respectively.The results of the analysis showed that the levels of NPK in the mixture of soil and straw compost, the levels of N 1.6-3.6%, P 0.39-44%, and Potassium 0.14-0.16%, the results obtained that levels of nitrogen, phosphorus met the minimum standard of SNI 19-7030-2004, the potassium content is only slightly or does not meet the standard of SNI/19/7030/2004. The results of the analysis of variance (ANOVA) showed that a mixture of soil and straw compost was suitable as a planting medium for sweet corn which had a significant effect on plant height, stem diameter, stem circumference, and number of leaves.
Co-Authors Abdul Wahab Pahrun Ahmad Kadir Kilo Ahmat Sudir Umar Alberto Costanzo Alberto Costanzo Alfikry Gonibala Ambarwati Ambarwati Anita Muhammad Arsyad, Muhammad Arif M. Arviani Arviani Asisah, Asisah Astin Lukum Astin Lukum Bait, Dewimuliawati J. Bambang Prijamboedi Botutihe, Deasy N. Bumulo, Nuraini Christopel, Nelpiani Christopel, Nelpiani D. Mazza D. Mazza, D. Dandi Saputra Halidi Daniele Mazza Daniele Mazza Deasy N Botutihe Deasy Natalia Botutihe Dewi Budi Purwati Djafar, Yuliyanti Wahab Eka Anggraini Odja Erga Kurniawati Erni Mohamad Fatma Tahir Hardianti Daing Hendri Iyabu Hidanurhayati, Hidanurhayati Ibrahim, Indriyanti Ika Riyana Tungkagi Ishak Isa Ismunandar Ismunandar Jafar La Kilo Julhim S Tangio Julhim S. Tangio Kadir Kilo, Ahmad Kadir, Ahmad Kamumu, Isal Kostiawan Sukamto Kostiawan Sukamto, Kostiawan Kusrini Kusrini La Alio La Ode Aman Lukman A. R. Laliyo Lukman A.R. Laliyo Maksum, M. Junaidi Mangara Sihaloho Mardjan Paputungan Masrid Pikoli Masrid Pikoli Mian Kau Monoarfa, Zunarti P Muhamad Abdulkadir Martoprawiro Muhammad Taufiq Nur Najah, Adilla Syahsiyatun Nelpiani Christopel Netty Ino Ischak Netty Ino Ischak Nita Suleman Nur Fadillah Pulukadang Nurhayati Bialangi Opir Rumape Patilima, Rusmiyati Ramona Nintias R. Abas Regina Olii Reski Rahmatia Idris Rusmiyati Patilima Sabihi, Ismail Saleh, Sri Deltalia Salman, Lismawati Saprini Hamdiani Sarmini A Iladat Siti Romla Maspeke Sri Revayana Kupang Sri Wanti Sappe Subawa, Kadek Suleman Duengo Suryanto Suryanto Sutra S Hadis Tahir, Wawan Triwahyuni S. Umamah Weny J.A. Musa Weny J.A. Musa Windi Dilapanga Wiwin Rewini Kunusa Wiwiyani Wiwiyani Yuszda K Salimi Zaenul Wathoni