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All Journal Jurnal Ilmu Pendidikan Jurnal Pendidikan IPA Indonesia Jurnal Penelitian Hasil Hutan Biocelebes PROSIDING SEMINAR KIMIA Jurnal Dinamika Pendidikan Jurnal Tadris Kimiya Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Akademika Kimia Pendas : Jurnah Ilmiah Pendidikan Dasar Jurnal Penelitian Hasil Hutan Jurnal Pengabdian kepada Masyarakat Nusantara PTK: Jurnal Tindakan Kelas Jurnal Akademika Kimia Edu Research : Jurnal Penelitian Pendidikan Aurelia: Jurnal Penelitian dan Pengabdian Masyarakat Indonesia Jurnal Banua Oge Tadulako Jurnal Akademika Kimia Jurnal Pendidikan MIPA Indonesian Journal on Learning and Advanced Education (IJOLAE)

Ijirana

Chemistry Education Study Program, Teacher Training, And Education, Tadulako University

Author-ID : 493015

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Social Sciences Other

Published : 40 Documents Claim Missing Document

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Metacognitive Skill Profiles of Chemistry Education Students in Solving Problem at Low Ability Level Ijirana, I.; Supriadi, S.
Jurnal Pendidikan IPA Indonesia Vol 7, No 2 (2018): June 2018
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v7i2.14266

The objective of this study was to categorize and describe the behavior of chemistry education students' metacognitive skills who had a low chemical understanding (low ability) in solving problems. The findings would be the basis of data for the development of instructional design on chemistry topics by utilizing metacognitive skill aspects. The subject of this study was two first-year students of chemical education, academic year 2016/2017 that joined a basic chemistry course at the low-level ability in Universitas Tadulako. Two subjects were picked through networking using a valid test comprehension. The subjects were determined regarding the percentage of low ability which was 87% of 79 students. The profile data of metacognitive skill were obtained through an essay test, think aloud and interview. The earned data were reviewed, grouped, encoded, and examined to see its credibility employing the method and time triangulation. The research found that both students of chemistry education having a low-level of basic chemistry adopted planning skills in solving problems which were the problem identifying, goal determining, and strategy managing. However, both did not use monitoring and evaluating skills.

Test of Antioxidant Activity of Ant Nest Plants (Myrmecodia tuberosa Jeck) Extract from Toli-Toli Sulawesi Tengah Indra, Pande; Supriadi, Supriadi; Ijirana, Ijirana
Jurnal Akademika Kimia Vol 8, No 2 (2019)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (348.168 KB)

Ant nest plants have the greatest diversity in Papua, but due to the different location and climate between Papua and Sulawesi, especially Central Sulawesi, the composition and the active compound are different. Differences of plant species will give differences in the content and quality of simplicia from ant nest plants. This study aimed to determine the power of antioxidant in ant nest extract (Myrmecodia tuberosa Jeck) from Toli-Toli, Central Sulawesi. The sample of this study was taken at Labonu, Basidondo, and extracted by maceration method. The testing of antioxidant activity used DPPH (2,2-Diphenyl-1-picrihydrazyl). Antioxidant activity of ant nest extract was measured using spectrophotometry with concentration 20, 40, 60 and 80 ppm. The results showed that ant nest plant extract was classified as a very powerful antioxidant with an IC50 value of 26.84 ppm.

PENELITIAN PEMBUATAN METIL ESTER ASAM LEMAK RANTAI SEDANG DAN PANJANG SERTA PEMURNIAN GLISEROL DARI MINYAK KELAPA MURNI Mappiratu Mappiratu; Ijirana Ijirana
Jurnal Penelitian Hasil Hutan Vol 28, No 4 (2010): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Penelitian ini bertujuan untuk mendapatkan kondisi optimum metanolisis minyak kelapa murni (MKM) dalam reaktor berpengaduk, metode pemurnian gliserol dan metode pemisahan metil ester asam lemak rantai sedang dari rantai panjang. Hasil penelitian menunjukkan MKM yang dihasilkan memenuhi persyaratan sebagai bahan baku metil ester asam lemak, sebab MKM yang dihasilkan mengandung air dan asam lemak bebas (FFA) mengandung asam laurat yang tinggi yaitu di atas 50% (52,86%). Kecepatan pengaduk dan waktu reaksi berpengaruh terhadap produksi 500 rpm dan waktu reaksi 50 menit. Pada kondisi tersebut fraksi massa metil ester asam lemak mencapai 100%. Metode pemurnian gliserol berpengaruh terhadap derajat kemurnian gliserol, dengan derajat kemurnian gliserol tertinggi adalah 98,04% yang diperoleh dari metode pemurnian ekstraksi dan netralisasi. Hasil fraksionasi metil ester asam lemak menghasilkan enam fraksi, tiga fraksi yaitu (fraksi I dan II dan VI) mengandung metil laurat yang lebih rendah dari MKM asalnya, dan tiga fraksi (fraksi III, IV dan fraksi V) mengandung metil laurat di atas MKM asalnya (di atas 70%). Fraksi VI dinyatakan sebagai metal ester asam lemak rantai panjang dengan rendemen 50% dari total metil ester asam lemak.

PRACTICALITY ASSESSMENT DEVICE DEVELOPMENT OF LEARNING MODEL BASED METACOGNITIVE SKILL Ijirana -; Suyono -; Sri Poedjiastoeti
PROSIDING SEMINAR KIMIA PROCEEDING OF INTERNATIONAL CONFERENCE 2015
Publisher : PROSIDING SEMINAR KIMIA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Practicality assessment device is developed according to PBKM model which has been rated valid by the experts. The aim of the research is to gain the valid PBKM model of the practility assessment device. The device consists of observation sheet of the applied model syntax, unit of learning program, and student’s worksheet. The valid score of the developed device is gained by giving the worksheet to five experts. The resultindicated that the whole evaluation aspects in the observation sheet of the applied model syntax which consist of direction to use the worksheet, the observation sheet content, and the used language gain the high score of validity. The validity of the whole evaluation aspects for the unit of learning program has been evaluated for high score by the experts, while the student’s activity sheet has been evaluated varies between high and very high. The result indicated the experts stated that the practicality score sheet which is developed from PBKM model is well-used in the implementation of PBKM model.

ANALISIS KEMAMPUAN PEMECAHAN MASALAH KIMIA SISWA KELAS XI DI SMAN KOTA PALU SULAWESI TENGAH Ijirana
Jurnal Dinamika Pendidikan Vol. 13 No. 3 (2020): November
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51212/jdp.v13i3.1936

Penelitian ini bertujuan untuk mendeskripsikan kemampuan pemecahan masalah siswa kelas XI SMAN di kota Palu. Pengukuran kemampuan pemecahan masalah di lihat dari kemampuan siswa dalam memecahkan masalah pada topik hidrokarbon dan termokimia dengan menggunakan tahap-tahap Polya, yaitu; memahami masalah, merencanakan pemecahan masalah, melaksanakan rencana, dan melihat kembali. Kemampuan pemecahan masalah siswa di katakan baik pada setiap tahap pemecahan masalah jika jumlah siswa yang berada pada kategori minimal tinggi sebanyak 60%. Penelitian ini adalah penelitian studi kasus. Sampel dalam penelitian ini berjumlah 240 siswa yang belajar kimia dari 507 siswa kelas XI di dua SMAN kota Palu. Sampel penelitian ditentukan menggunakan teknik random sampling. Data kemampuan pemecahan masalah diperoleh dari siswa dengan memberikan tes kemampuan pemecahan masalah yang berbentuk uraian bebas yang tervaliditasi. Temuan dari penelitian ini menunjukkan bahwa rata-rata siswa kelas XI SMAN di kota Palu hanya mampu menyelesaikan masalah tanpa memahami, melakukan perencanaan, dan melihat kembali hasil pemecahan masalahnya ketika memecahkan masalah hidrokarbon. Kemampun tersebut bahkan tidak dimiliki siswa pada topik Termokimia. Oleh karena itu, temuan ini mengindikasikan bahwa siswa SMAN di kota Palu belum mampu merepresentasikan masalah dalam bentuk gambar, simbol, pernyataan, ataupun kalimat matematika, belum mampu merencanakan pemecahan masalah, dan menghubungkan hasil yang diperoleh dengan konsep yang berhubungan. Temuan ini mengindikasikan perlunya siswa dilatih memecahkan masalah dalam pembelajaran dengan menerapkan langkah-langkah pemecahan masalah. Keywords: Hidrokarbon, Tahapan Polya, Pemecahan Masalah, Termokimia

Kajian Etanolisis In Situ Minyak Kelapa untuk Sintesis Etil Ester Asam Lemak Ijirana dan Afadil Ijirana dan Afadil
Biocelebes Vol. 3 No. 1 (2009)
Publisher : Biology Department, Mathematics and natural science, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar

There are several aim of this research, consist of: 1) to find out optimum concentration catalyst H2SO4 in synthesis of ethyl ester coconut oil fat acid when FFA contained in coconut flour more than 5 %, 2) to find out concentration of catalyst NaOH (percent v/v) that produce the higher fat acid ethyl ester product, 3) to find out ratio of ethanol 95 % / coconut flour, and 4) to find out the best reaction temperature of coconut oil ethanolysis in situ that produce ethyl ester coconut oil fat acid in higher yield. The first step is to know water contain on coconut flour. The second is to know oil contain in coconut flour using sochletation method. FFA analyzed was done to find out how many reaction will be done, transestherification and esterification. Esterification was not done because FFA contained only 2 % (not more than 5%). From this research, we can conclude that selected reaction condition are: ratio coconut flour with ethanol 95%, 1:5, concentration of catalyst, NaOH 1,2% and reaction temperature 55oC. Key words: Ethanolysis in situ, coconut oil, fat acid ethyl ester syntesis.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2010.28.4.415-426

Application of Cooperative Learning Model Type Teams Games Tournament (TGT) with Demonstration Based to Improve the Learning Outcomes of Colloid Topic in Student Class XI SMA Negeri 7 Palu Nur Intan; Minarni R. Jura; Ijirana Ijirana
Jurnal Akademika Kimia Vol. 8 No. 3 (2019)
Publisher : Universitas Tadulako

This study aimed to obtain a description of implementation on student’s learning outcomes the application of cooperative learning model of TGT based on demonstration Class XI on colloid material in SMA Negeri 7 Palu. The type of research used in this research was pre-experimental designs (non-designs) with research design that was one-group pre-test post-test design. Sampling in this study was chosen by purposive sampling. The sample consisted of two classes, class XI IPA 1 as experimental class 1 (n = 28) and class XI IPA 2 as experiment class 2 (n = 29). Student learning outcomes were processed using inferential statistical analysis of the Wilcoxon Rank-Unparpulated Ranking nonparametric test. The results showed that the experimental class 1 was Zcount (-4.62) <Ztable (-1.96) and experiment 2 was Zcount (-4.70) <Ztable (-1.96). The effectiveness of the implementation of learning model of TGT based on demonstration to words student learning outcomes can also be seen from the assessment of student learning outcomes with the average posttest score for experimental class 1 was 83.29 and experiment class 2 was 80.86 with the result of N-gain calculation for both experiment class included in high category that was equal to 0.83 and 0.85. So it can be concluded that the implementation of learning model of TGT based on demonstration can improve student learning outcomes with average greater than 75 on colloid material in SMA 7 Palu.

Crude Bromelain Enzyme Activities Based on Maturity Level of Pineapple Detris Poba; Ijirana Ijirana; Jamaludin Sakung
Jurnal Akademika Kimia Vol. 8 No. 4 (2019)
Publisher : Universitas Tadulako

Utilization of pineapple is always focused on consumption for fresh fruit and animal feed. many people do not know the other benefits of pineapple. The presence of protease enzymes in it, increasing its utilization. The enzyme is bromelin, which can be obtained by isolating it from pineapple. For this reason, the aim of this study is to isolate the crude bromelain enzyme based on the maturity level of pineapple and then test its proteolytic activity. Pineapple was blended, then the filtrate was deposited, then centrifuged to obtain crude bromelain which is dried by the drying method and tested for its activity using milk substrate. The results showed that old pineapple is the best level of maturity and the sun is the best drying method with proteolytic activity of 0.053 and 0.056 MCU/mg respectively. Its optimum activity is pH 5.8 and 55 oC.

Sparkol Videoscribe Usage on Colloid Material as a Media for Chemistry Education Reni Septiani; Supriadi Supriadi; Ijirana Ijirana
Jurnal Akademika Kimia Vol. 9 No. 1 (2020)
Publisher : Universitas Tadulako

This research method was research and development (R & D), which purposed to obtain the sparkol videoscribe designs of colloidal material and the validity of designs that were reviewed by experts as theoretical experts. The object of this study was sparkol videoscribe. Data collection was divided into two, namely media design data and media validity that were designed by using assessment sheets from 5 experts, 3 people were the learning media experts and 2 people were the chemical material experts. Data were analyzed descriptively to determine the justification of the validity of the research object. The results of the data analysis obtained that sparkol videoscribe design of material colloid had characteristics, namely images, moving hand animation, music, explanation of material in the form of sound and the composition of sentences incorporated in whiteboard animation. The designs were declared valid with a very good category according to experts and can be used as a chemistry education media with a score of 3.7 based on the total score of the instructional media experts and 3.45 based on the total score of the chemical material experts.

Co-Authors AA Sudharmawan, AA Ahmar, Dewi S. Almubarak Almubarak Anastasya, Anastasya Anna Kurnia Aprilina Rizqi Auliya AR, Rommy Atiek Winarti Baharuddin Paloloang Damayanti, Alfina Detris Poba Detris Poba Elyas Djufri Esterlina Marpaung, Meida Ficiyarni Gleryl F. Novemly Haeruddin Haeruddin Hariani Hariani Hartarti Uminah Hendri Hermawan Adinugraha Hengki Abram, Paulus Hermin Ika Kartika Indra, Pande Irna Cahyani Jamaludin M Sakung Jusman Mansyur Kasmudin Mustapa Lilin Nurjanah Magfirah Magfirah Magfirah Magfirah, Magfirah Mailili, Wahyuni Mappiratu Mappiratu Marvina, Vivien Mery Napitupulu Minarni Rama Jura Misnah Misnah Muh. Rizal Muh. Rizal Nur Intan Nurbaya Nurbaya, Nurbaya Nurfauzia Nurfauzia Nurvita Pajri, Nur Parham Saadi Paul Rumondor Prasetio, Budi Rahayu, Melani Ramadhan , Moh. R. Ratman Ratman Ratman Ratman Reni Septiani Rizall, Muhammad S. Supriadi, S. Sarintan Nurcahyati Kaharu Siti Aminah Siti Nuryanti Sitti Aminah Sitti Aminah Sitti Rahmawati Sri Muliani, Sri Sri Mulyani Sri Mulyani Sabang Sri Poedjiastoeti Sri Wahyuni Sri Wahyuni Suherman Suherman Suherman Suherman Supriadi Supriadi Supriadi Supriadi Suyono - Syamsuriwal, Syamsuriwal Tri Santoso Tri Santoso Windia Hadi, Windia

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