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All Journal Jurnal Pendidikan Kimia FKIP Universitas Halu Oleo Al-Kimia Indonesian Journal of Chemistry Chemistry Indonesian Journal of Chemical Research Molluca Journal of Chemistry Education (MJoCE) Hydrogen: Jurnal Kependidikan Kimia Jurnal Biofiskim: Pendidikan dan Pembelajaran IPA JURNAL BAHARI PAPADAK HIRONO : Jurnal Pengabdian Masyarakat
La Harimu
Study Program Of Chemistry Education, Faculty Of Teacher Training And Education, Haluoleo University, Kampus Baru Anduonohu, Kendari, Sulawesi Tenggara, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Library & Information Science Physics Social Sciences Veterinary

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PENGARUH VARIASI MASSA KAYU SECANG (Caesalpinia sappan L.) PADA AIR MINUM TERHADAP SIFAT FISIKOKIMIA Azmi, Muh Ulul; Rahmanpiu, Rahmanpiu; Harimu, La
Jurnal Pendidikan Kimia FKIP Universitas Halu Oleo Vol 4, No 2 (2019): Edisi Agustus
Publisher : Jurusan Pendidikan Kimia Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (554.501 KB) | DOI: 10.36709/jpkim.v4i2.11315

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh massa kayu secang (C. sappan L.) dalam minuman secang terhadap sifat fisikokimia yang sesuai SNI dan untuk mengetahui organoleptik minuman secang. Metode yang digunakan pada penelitian ini yaitu metode eksperimen dengan variasi massa kayu secang (C. sappan L.) sebanyak 1, 2, 3, 4, 6, 8, dan 10 gram dalam 1 liter air. Pengukuran Total Dissolved Solid (TDS) menggunakan alat TDS meter, pengukuran bau, rasa, dan warna diuji secara organoleptik menggunakan 15 orang panelis, dan pengukuran pH menggunakan alat pH meter. Berdasarkan hasil penelitian dan tingkat kesukaan panelis diperoleh perlakuan terbaik yaitu 1 gram dalam 1 liter air dengan nilai Total Dissolved Solid (TDS) 188 mg/L, rata-rata tertinggi tingkat kesukaan panelis terhadap aroma 3,082, terhadap rasa 3,007, dan terhadap warna 2,716 serta nilai pH 6,8.
PENGARUH KECEPATAN PENGADUKAN DAN WAKTU ADSORPSI TERHADAP MUTU MINYAK GORENG BEKAS MENGGUNAKAN ADSORBEN ARANG AKTIF AMPAS SAGU (Metroxylon sago sp.) Hardianti, Dian; Ratna, Ratna; Harimu, La
Jurnal Pendidikan Kimia FKIP Universitas Halu Oleo Vol 4, No 3 (2019): Edisi Desember
Publisher : Jurusan Pendidikan Kimia Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (598.711 KB) | DOI: 10.36709/jpkim.v4i3.11717

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh kecepatan pengadukan dan  waktu adsorpsi terhadap mutu minyak goreng dengan adsorben arang ampas sagu (metroxylon sago sp.). Metode penelitian ini meliputi pembuatan arang aktif dari ampas sagu, analisis kualitasarang aktif ampas sagu, pemurnian minyak goreng bekas, analisis kualitas minyak goreng hasil pemurnian. Padapenelitian ini akan diamati beberapa variabel yang berpengaruh terhadap proses adsorpsi yaitu   pengaruh kecepatan dan waktu adsorpsi minyak goreng bekasdengan adsorben   arang aktif ampas sagu. Karakteristik permukaan adsorben ampas sagu dianalisis dengan XRF dan BET. Hasil analisis XRF terhadap arang aktif ampas sagu menunjukkan kandungan senyawa oksida terbesar yaitu SiO2 sebesar 8,31% dan analisis BET menunjukkan luas permukaan sebesar 174,81 m2/g. Proses pemurnian minyak goreng bekas menggunakan arang aktif ampas sagu      dipengaruhi oleh kecepatan dan waktu kontak minyak dengan adsorben. Kecepatan pengadukaan dan waktu optimum yang diperoleh untuk menurunkan tingkat kekeruhan, kadar air dan bilangan asam yaitu pada skala 5 dan waktu kontak 60 menit, dengan tingkat kekeruhan sebesar 2,43 NTU, kadar air 0,12% dan bilangan asam 1,16 mg KOH/g.
PENGEMBANGAN INSTRUMEN TES THREE TIER MULTIPLE CHOICE (TIGA TINGKAT) UNTUK MENGIDENTIFIKASI PEMAHAMAN KONSEP SISWA TINGKAT SMP Martianingsih, Nuning; Jamili, Jamili; Harimu, La
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Publisher : Halu Oleo University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (631.93 KB) | DOI: 10.33772/biofiskim.v3i2.21797

Abstract

Abstrak. Tujuan penelitian ini adalah  untuk mengembangkan instrument tes three tier multiple choice (tiga tingkat) yang valid untuk mengukur pemahaman konsep dan miskonsepsi siswa pada materi sistem peredaran darah manusia. Penelitian ini merupakan penelitian pengembangan research and development (R&D). Populasi penelitian pada tahap implementasi adalah siswa SMP Negeri 4 Kendari dan SMP Kartika XX-6 Kendari dengan jumlah 249 siswa. Pengambilam sampel  menggunakan purposive sampling yaitu dengan mempertimbangkan ketentuan agar diperolehnya hasil yang baik. Pertimbangan yang dimaksud yakni pengoperasian dalam evaluasi instrument tes three tier multiple choice (tiga tingkat) untuk mengidentifikasi pemahaman konsep pada materi sistem peredaran darah manusia yang dilaksanakan secara online, sehingga sampel yang digunakan adalah siswa yang mempunyai fasilitas untuk pembelajaran daring. Hasil penelitian menunjukkan bahwa (1) nilai validitas konstruk sebesar 0,85, 2) nilai validitas isi sebesar 0,79 (5) nilai validitas bahasa sebesar 0,91 (3) persentasi hasil validasi ahli sebesar 87,1% dengan kategori sangat baik (4) indeks reliabilitas sebesar 0,95 dengan kriteria sangat tinggi (6) indeks tingkat kesukaran soal terdapat 1 soal kategori mudah, 33 soal kategori sedang dan 1 soal kategori sukar (6) kriteria daya pembeda kategori baik sekali sebanyak 4 soal, kategori baik sebanyak 20 soal, kategori cukup sebanyak 5 soal dan kategori jelek 6 soal. (7) persentasi secara keseluruhan siswa yang memahami konsep sebesar 27% dan siswa yang mengalami miskonsepsi sebesar 55%. Kata Kunci: pengembangan, instrumen tes three tier multiple choice (tiga tingkat), sistem peredaran darah manusia
PENGARUH MODEL PEMBELAJARAN BERBASIS MASALAH DAN INKUIRI TERBIMBING TERHADAP RETENSI SISWA SMP DITINJAU DARI MOTIVASI BELAJAR Jaya, Muhammad Imin; Harimu, La; Ruslin, Ruslin
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Publisher : Halu Oleo University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (965.608 KB) | DOI: 10.33772/biofiskim.v1i2.13728

Abstract

Penelitian ini bertujuan untuk memperoleh informasi dan data empiris mengenai pengaruh model pembelajaran berbasis masalah dan inkuiri terbimbing terhadap retensi  siswa yang ditinjau dari motivasi belajar yang berbeda di SMPN 1 Tiworo Tengah. Desain penelitian ini adalah quasiexperimentdengan faktorial 2x2. Sampel penelitian ini diambil dengan menggunakan  teknik random sampling. Data penelitian ini diperoleh melalui tes retensi berupa soal pilihan kemudian dianalisis menggunakan uji manova pada Software SPSS 21 pada α = 0,05. Hasil analisis menunjukkan bahwatidak ada pengaruh yang signifikan model pembelajaran terhadap retensi peserta didik,ada pengaruh yang signifikan motivasi belajar terhadap retensi peserta didik dan ada pengaruh interaksi yang signifikan antara model pembelajaran dan motivasi belajar terhadap retensi peserta didik. Kata Kunci:Model Pembelajaran, Berbasis Masalah, Inkuiri Terbimbing, Retensi, Motivasi Belajar.
KEPRAKTISAN PENGEMBANGAN PERANGKAT PEMEBELAJARAN MENGGUNAKAN PETA KONSEP UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR KRITIS SISWA Wildana, Putri; Harimu, La; Ramadhan, L.O.A.N.
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Publisher : Halu Oleo University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (354.414 KB) | DOI: 10.33772/biofiskim.v3i2.18265

Abstract

Abstrak. Tujuan penelitian ini adalah untuk menganalisis kepraktisan penerapan pengembangan perangkat pembelajaran menggunakan peta konsep dalam kemampuan berpikir kritis siswa SMA. Sampel penelitian adalah siswa kelas XI IPA-5 SMA Negeri 2 Kendari yang dilakukan secara purposive sampling. Jenis data dalam penelitian adalah data primer, yang merupakan hasil pengumpulan secara langsung sesuai obyek penelitian dengan mengumpulkan data tentang unsur kepraktisan terdiri keterlaksanaan pembelajaran, kemampuan guru mengelola pembelajaran, dan respon guru terhadap pembelajaran yang telah dikembangkan dan divalidasi.  Data dianalisis secara deskriptif kuantitatif. Hasil penelitian diperoleh bahwa nilai rata-rata total kualitas keterlaksanaan pembelajaran sebesar 1,68 dengan kategori terlaksana seluruhnya, nilai rata-rata total kemampuan guru mengelola pembelajaran sebesar 3,96 dengan kategori baik dan nilai rata-rata total respon guru terhadap pembelajaran sebesar 3,93 dengan kategori praktis dan tidak revisi. Ketiga instrumen yang digunakan untuk mengukur tingkat kepraktisan perangkat pembelajaran yang telah dikembangkan memenuhi kriteria kepraktisan. Kata Kunci: kepraktisan, peta konsep, berpikir kritis
ANALISIS KOMPETENSI PEDAGOGIK DAN KESIAPAN GURU SEKOLAH DASAR DALAM IMPLEMENTASI KURIKULUM 2013 DI KABUPATEN MUNA BARAT Sarimu, La; Harimu, La; Ruslin, Ruslin
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Publisher : Halu Oleo University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (70.383 KB) | DOI: 10.33772/biofiskim.v1i2.13724

Abstract

This study aims to analyze (1) pedagogic competence of elementary school teachers in the implementation of Curriculum 2013; (2) the readiness of elementary school teachers in the implementation of Curriculum 2013; (3) the readiness of learning supporting facilities and infrastructures; (4) learning plan 2013 curriculum developed by elementary school teachers; (5) implementation of the 2013 curriculum learning by elementary school teachers; and (6) assessment of curriculum 2013 by elementary school teachers. This type of research is descriptive research. The type of data used in this study is descriptive quantitative and qualitative.The sample of this research is teacher of class I and IV which amounts to 40 teachers. Sampling technique in this research use purposive sampling. The instruments used are written test, questionnaire, observation sheet and documentation.The results showed that (1) pedagogic competence based on test results with an average value of 56.25 is in the category enough; (2) teacher pedagogic competence based on teacher questionnaire with average score 73,48 are in good category; (3) teacher preparedness based on questionnaire with average value 62,85 are in enough category; (4) readiness of facilities and infrastructure of learning support based on observation guidance with average value 79,3 is in good category; (5) learning planning based on the result of  study with the average score of 73.42 is in good category; and(6) implementation of learning based on observation guidance with average value 69,57 are in enough category; 7) the assessment of teacher based questionnaires with an average score of 63.75 are in enough categories. Keywords: Pedagogic Competency, Teacher Readiness, Readiness of Facilities and Infrastructure, Learning Planning, Learning Implementation, Learning Assesment.
PEMISAHAN Zn MENGGUNAKAN LIGAN ASAM POLI(EUGENOKSI ASETAT) DENGAN METODE EKSTRAKSI CAIR-CAIR La Harimu
Molluca Journal of Chemistry Education (MJoCE) Vol 1 No 2 (2011): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol1iss2pp103-109

Abstract

Separation of Zn with poly(eugenoxyacetic acid) with liquid-liquid extraction have been counducted in four step that were determination of the optimum pH, determine optimum ligan volume, determine optimum extraction time, and determine optimum Zn concentration. The concentration of Zn in water phase was determined using Atomic Absorption Spectroscopy (AAS). %E is the number that show the effectiveness the extraction proccess. If the %E is bigger, it show that the extraction proccess is effective, and vice versa. The optimum condition for ion separation was occurred at pH 6, the carrier volume was optimum at 5 mL (1 × 10-3 M), the optimum extraction time was 24 hours and the concentration range of metals ion accurately extracted was 1 × 10-4 - 5 x 10-4 M with %E was 97.71%
SEPARATION OF Fe (III), Cr(III), Cu(II), Ni(II), Co(II), AND Pb(II) METAL IONS USING POLY(EUGENYL OXYACETIC ACID) AS AN ION CARRIER BY A LIQUID MEMBRANE TRANSPORT METHOD La Harimu; Sabirin Matsjeh; Dwi Siswanta; Sri Juari Santosa
Indonesian Journal of Chemistry Vol 10, No 1 (2010)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (213.423 KB) | DOI: 10.22146/ijc.21482

Abstract

Fe (III), Cr(III), Cu(II), Ni(II), Co(II), and Pb(II)  metal ions had been separated using poly(eugenyl oxyacetic acid) as an ion carrier by bulk liquid membrane transport method. The effect of pH, polyeugenyl oxyacetic acid ion carrier concentration, nitric acid concentration in the stripping solution, transport time, and metal concentration were optimized. The result showed that the optimum condition for transport of metal ions was at pH 4 for ion Fe(III) and at pH 5 for Cr(III), Cu(II), Ni(II), Co(II), and Pb(II) ions. The carrier volumes were optimum with concentration of 1 x 10-3 M at 7.5 mL for Cr(III), Cu (II),  Ni(II), Co(II) ions and at 8.5 mL for Fe(III) and Pb(II) ions. The concentration of HNO3 in stripping phase was optimum at 2 M for Fe(III) and Cu(II) ions, 1 M for Cr(III), Ni(II) and Co(II) ions, and 0.5 M for Pb(II) ion. The optimum transport times were 36 h for Fe(III) and Co(II) ions, and 48 h for Cr(III), Cu (II), Ni(II), and Pb(II) ions. The concentration of metal ions accurately transported were 2.5 x 10-4 M for Fe(III) and Cr(III) ions, and 1 M for Cu (II), Ni(II), Co(II), and Pb(II) ions. Compared to other metal ions the transport of Fe(III) was the highest with selectivity order of Fe(III) > Cr(III) > Pb(II) > Cu(II) > Ni(II) > Co(II). At optimum condition, Fe(III) ion was transported through the membrane at 46.46%.
SYNTHESIS OF POLYEUGENYL OXYACETIC ACID AS A CARRIER TO SEPARATE HEAVY METAL ION Fe (III), Cr(III), Cu(II), Ni(II), Co(II), AND Pb(II) THAT USING SOLVENT EXTRACTION METHOD La Harimu; Sabirin Matsjeh; Dwi Siswanta; Sri Juari Santosa
Indonesian Journal of Chemistry Vol 9, No 2 (2009)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (345.854 KB) | DOI: 10.22146/ijc.21540

Abstract

Polyeugenyl oxyacetic acid has been synthesized from polyeugenol and chloroacetic acid and applied to separate metal Fe(III), Cr(III), Cu(II), Ni(II), Co(II), and Pb(II) using solvent extraction method. pH effect, polyeugenyl oxyacetic acid ion carrier concentration, extraction time, and metal concentration optimized to gain optimum condition. The result of experiment indicated that polyeugenyl oxyacetic acid resulted the yellowed brown synthesis with melting point 125 °C and yield 68.9%. The Characterization of spectroscopy IR attributed by absorption to the area 1735,8 cm -1 as carbonyl extend vibration (C=O) acid and 1H-NMR that was attributed by chemical shift at 4.6 ppm as carboxy proton (CH2-C=0). The metal separation optimum condition gained pH 3-6 for ion Fe(III), pH 5 for ion Cr(III), Ni(II), and Co(II) and pH 6 for ion Cu(II), and Pb(II). Optimum carrier concentraction 5 mL, 10 mL, and 15 mL for ion Fe(III), and ion Cr(III), Ni(II), Co(II), and ion Cu(II), Pb(II) respectively. Extraction time 2.5 h for ion Fe(III), 20 h for ion Cr(III), and 36 h for ion Cu(II), Pb(II), Ni(II), and Co(II). Metal concentration that would extracted correctly (0.75-5 x 10-4 M) for ion Fe(III), (0.75-2.5 x 10-4 M) for ion Cr(III), Ni(II), and Co(II) and (0.75-1 x 10-4 M) for ion Cu(II) and Pb(II). The best polyeugenil oxyacetic acid response to separate ion Fe(III) than other ions with selectivity order Fe(III)> Cr(III)> Cu(II)> Pb(II)> Ni(II)> Co(II).
Separation Of Copper And Chromium Metal In Ultrabasic Rocks From Top Of Manoapa Region, Subdistrict Of Lasusua Southeast Sulawesi By Ligand of 2 - (Aminometil) Pyridine Harimu, La; Hasria, Hasria; Intan, Putri
Indonesian Journal of Chemical Research Vol 1 No 1 (2013): Edisi Pertama (First Edition)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2013.1-har

Abstract

Study on separation of ions chromium metal and copper in ultrabasic material located in the village to of Monapa subdistrict Lasusua Regency Kolaka Utara Province Sulawesi Tenggara was conducted. The aim of this study was to determine the ability of the ligand 2-(aminometil) pyridine to separate chromium metals and copper to pure metals and its application to separate the chromium metals (Cr) and copper (Cu) in ultrabasic material from the village of Puncak Monapa subdistrict Lasusua Regency Kolaka Utara Province Sulawesi Tenggara by means of extraction method. The concentration of ions chromium metal (Cr) and copper (Cu) of the pure metals are extracted respectively 10 ppm, and the concentration of the ligand 2-(aminometil) pyridine is 10 ppm. For concentration ion chromium metal (Cr) and copper (Cu) in ultrabasic material with 20x and 30x dilution is 8.3875 and 1.3590 and 3.50 ppm and 2,001 ppm for the ions copper metal (Cu). Results of this research shomush that the ability of ligand 2-(aminometil) pyridine for extracting chromium metals (Cr) and copper (Cu) for a single pure metal has a percent extraction (%E) are respectively 79.375 % and 82.37 %. Separation ability of ions chromium metal (Cr) and ions copper (Cu) mixed are 77.625% and 79.96%. For its application in separating ions chromium metal (Cr) and copper (Cu) in ultrabasic material to 20 time dilution extraction are 74.51% and 71.35%, and 30 time dilution are 69.28% and 69.71%. Based on the results of the study ligand 2-(aminometil) pyridine is relatively better for ions copper metal (Cu) for extraction ions of pure metal and relatively similar to ultrabasic material.
Co-Authors ., Asriyanti Aceng Haetami, Aceng Akhmatul Ferlin Asuhadi, Sunarwan Azmi, Muh Ulul Dahlan Dian Hardianti, Dian Dwi Siswanta Dwi Siswanta Fachry Abda El Rahman Febryzha, Nurul Widya Haeruddin Haeruddin Hasria Hasria, Hasria Intan, Putri Jamili Jamili Jaya, Muhammad Imin kahar, kaharuddin L, Mariani La Rudi Mandasari, Ekacahyana Martianingsih, Nuning Muh. Edihar Mulyana, Wa Ode Nurlansi, Nurlansi Puspitasari, Faizul Rahmanpiu, Rahmanpiu Ramadhan, L.O.A.N. Ratna Ratna Ruslin, Ruslin Sabirin Matsjeh Santoso, Giswa Ayu Pratiwi Sari, Citra Purnama Sarimu, La Sri Juari Santosa Sri Juari Santosa Sri Rejeki Wildana, Putri