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All Journal Jurnal Entropi Sainstek Irfani Tadbir: Jurnal Manajemen Pendidikan Islam Orbital: Jurnal Pendidikan Kimia Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia Journal Health & Science : Gorontalo Journal Health and Science Community Jambura FIsh Processing Journal Jambura Journal of Educational Chemistry Jambura Journal of Chemistry Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education) Pentagon: Jurnal Matematika dan Ilmu Pengetahuan Alam Algoritma: Jurnal Matematika, Ilmu Pengetahuan Alam, Kebumian dan Angkasa Damhil: Jurnal Pengabdian kepada Masyarakat J-CEKI Jurnal Pendidikan Kimia, Fisika dan Biologi Konstanta : Jurnal Matematika dan Ilmu Pengelatuan Alam
Erni Mohamad
Universitas Negeri Gorontalo
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Mathematics Public Health Social Sciences Other

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Pemanfaatan Gulma Siam (Chromolaena odarata L.) Sebagai Adsorben Logam Timbal Erni Mohamad; Intan J. Oputu; Julhim S. Tangio
Jambura Journal of Chemistry Vol 2, No 1 (2020): February
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (175.483 KB) | DOI: 10.34312/jambchem.v2i1.4528

Abstract

This study aims to utilize (Chromolaena odorata L) as a metal adsorbent. The methods used to make activated charcoal are dehydration, carbonization, and activation. The activated carbon is then characterized to obtain activated charcoal that can be applied, then optimized. The results of activated carbon characterization obtained have reached the activated carbon quality requirements based on the Indonesian Industry Standard (SII No. 0258-88). Based on the adsorption test, the optimum pH of Pb2+ (Pb (NO3) 2 (in distilled water) Chromolaena odorata L charcoal activated by NaOH 0.2 M under varying pH (2,3,4,5,6) is at pH 5 with 69.00% absorption. The optimum contact time required for Pb ion adsorption is 4 hours at variation (1-5 hours) with 70.19% absorption. The optimum concentration at variation (concentration 20; 40; 60; 80; 100 ppm) on Pb ion adsorption is 100 ppm with 76.15% absorption. The optimum heating time is a variation of 1.5; 2; 2.5; and 3 hours of Pb ion adsorption is one hour 30 minutes with an absorption of 65.95%. Based on the optimization results, the activated carbon from the Chromolaena odorata L can be used as an adsorption material against the contamination of lead heavy metals (Pb).
ANALISIS DAN DESAIN PERANGKAT PEMBELAJARAN MODEL PROBLEM BASED LEARNING BERBASIS HOTS DAN LITERASI PADA PEMBELAJARAN IPA Alfian Erwinsyah; Ramli Utina; Frida Maryati Yusuf; Erni Mohamad; Muhamad Iksan
Irfani Vol. 18 No. 1 (2022): Irfani (e-Journal)
Publisher : LP2M IAIN Sultan Amai Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30603/ir.v18i1.2423

Abstract

The purpose of this study is to develop a problem-based learning model based on higher order of thinking skills. The research method used is the ADDIE Research and Development model which is limited to the Analysis and Design Steps. The tools developed are RPP, LKPD, Assessment Instruments. The results of the research are that the HOTS-based and Literacy-based PBL learning device products have real characteristics in learning, arranged systematically with PBL syntax, will develop HOTS and student literacy. and the final product of the learning device meets the valid criteria seen from the validator score. Keywords: Learning Tools, ADDIE, PBL, HOTS
PERBEDAAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING DAN DISCOVERY LEARNING PADA MATERI HUKUM DASAR KIMIA TERHADAP HASIL BELAJAR SISWA DI SMAN 1 SUWAWA Nur'afni Suaib; Mardjan Paputungan; Hendri Iyabu; Ishka Isa; Erni Mohamad; Wiwin Rewini Kunusa
Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia Vol 5, No 2 (2022): (November) Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia
Publisher : Universitas Islam Kalimantan MAB Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/dl.v5i2.7875

Abstract

Penelitian ini bertujuan untuk mengetahui perbedaan hasil belajar siswa dengan menggunakan model pembelajaran Problem Based Learning dan Discovery Learning pada pokok bahasan Hukum Dasar Kimia di SMA Negeri 1 Suwawa. Metode penelitian ini merupakan penelitian eksperimen. Jenis penelitian ini termasuk quasi eksperimen (eksperimen semu). Desain yang digunakan adalah Pretest Posttest Non-Equivalent Group Design. Populasi penelitian adalah seluruh peserta didik kelas X IPA dengan sampel penelitian adalah X IPA 1 dan X IPA 2. Untuk mengetahui perbedaan model pembelajaran Problem Based Learning dan Discovery Learning terhadap hasil belajar siswa pada materi Hukum Dasar Kimia penulis memberikan tes dalam bentuk pilihan ganda sebanyak 10 soal dan essay sebanyak 5 soal yang telah diuji validitasnya. Pengujian hipotesis pada penelitian ini menggunakan uji t. Dari hasil pengujian hipotesis diperoleh nilai thitung = 4.38 > ttabel = 1.67722 yang dimana H0 ditolak dan Ha diterima, sehingga dapat disimpulkan bahwa terdapat perbedaan model pembelajaran Problem Based Learning dan Discovery Learning pada materi Hukum Dasar Kimia terhadap hasil belajar siswa.
Deskripsi Keterampilan Generik Sains Siswa dalam Penyelesaian Soal Kimia pada Materi Hidrolisis Garam Marnila Marnila; Erni Mohamad; Wiwin Rewini Kunusa; Astin Lukum; Julhim S. Tangio; Ahmad Kadir Kilo
Orbital: Jurnal Pendidikan Kimia Vol 7 No 1 (2023): Orbital: Jurnal Pendidikan Kimia
Publisher : Chemistry Education Department of Education and Teaching Faculty

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/ojpk.v7i1.17128

Abstract

Generic science skills are very important for students, in addition to being able to improve students' understanding of concepts, by measuring generic science skills teachers can understand the character and skills possessed by students. This study aims to determine students' generic science skills in solving chemistry problems on salt hydrolysis material by high school students of class XI IPA SMA Muhammadiyah Batudaa. The focus of this study is to describe students' generic science skills in solving chemistry problems on salt hydrolysis material. The method used in this study is a qualitative descriptive research method using tests. The data was obtained through a description test, which was done in writing by 66 students at SMA Muhammadiyah Batudaa. The data that has been obtained will then be analyzed first through the code on the answers given by students, as well as through the scores of each component of the student answers. The results showed the achievement of generic science skills, namely indirect observation 78.41% (good), symbolic language 59.85% (less), law of cause and effect 62.06% (sufficient), logical frame 73.48% (sufficient), logical consistency 64.44% (sufficient). In general, the mastery of generic science skills of grade XI science students of Muhammadiyah Batudaa High School obtained an average percentage of 63.42%, including in the sufficient category.
Measuring Students' Scientific Argumentation Skills in Explaining Phenomena Related to Acid-Base Concepts Rahmawati Hilala; Lukman Abdul Rauf Laliyo*; Jafar La Kilo; Julhim S. Tangio; Erni Mohamad; Mangara Sihaloho
Jurnal Pendidikan Sains Indonesia Vol 11, No 2 (2023): APRIL 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1058.995 KB) | DOI: 10.24815/jpsi.v11i2.27822

Abstract

Scientific argumentation is one of the main competencies of students in communicating chemical phenomena through the application of conceptual mastery that they have understood. The development of this ability has been postulated in the 2013 curriculum through constructivist-based learning approaches and scientific inquiry, either in the classroom or the laboratory. However, there is relatively little information on how students' scientific argumentation skills develop. This study aims to measure students' scientific argumentation skills in explaining five science phenomena related to the acid-base concept, namely: acid rain, salt crystal making, the use of antacids as ulcer medicine, the use of CaMgCO3 dolomite fertilizer, and the difference in the acidity level of HCl and H2SO4, using Rasch modeling. Each phenomenon was measured by three multiple-choice test items, which were developed to test students' ability to make claims (Q1), evidence (Q2), and justification (Q3). The data were analyzed using Rasch modeling, allowing researchers to measure the item and individual respondent levels. Respondents were 100 chemistry students in Gorontalo, who were differentiated in gender and adversity quotient. The results showed that the measurement instrument has good validity and reliability. In addition, it was found that students' abilities differed; some items responded differently regarding gender and adversity quotient. Most students tended to be weak in explaining the phenomenon of acid rain, the use of antacids for ulcer disease, the use of dolomite fertilizer, and the difference in the acidity level of HCl and H2SO4
Measuring Students' Scientific Argumentation Skills in Explaining Phenomena Related to Acid-Base Concepts Rahmawati Hilala; Lukman Abdul Rauf Laliyo*; Jafar La Kilo; Julhim S. Tangio; Erni Mohamad; Mangara Sihaloho
Jurnal Pendidikan Sains Indonesia Vol 11, No 2 (2023): APRIL 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jpsi.v11i2.27822

Abstract

Scientific argumentation is one of the main competencies of students in communicating chemical phenomena through the application of conceptual mastery that they have understood. The development of this ability has been postulated in the 2013 curriculum through constructivist-based learning approaches and scientific inquiry, either in the classroom or the laboratory. However, there is relatively little information on how students' scientific argumentation skills develop. This study aims to measure students' scientific argumentation skills in explaining five science phenomena related to the acid-base concept, namely: acid rain, salt crystal making, the use of antacids as ulcer medicine, the use of CaMgCO3 dolomite fertilizer, and the difference in the acidity level of HCl and H2SO4, using Rasch modeling. Each phenomenon was measured by three multiple-choice test items, which were developed to test students' ability to make claims (Q1), evidence (Q2), and justification (Q3). The data were analyzed using Rasch modeling, allowing researchers to measure the item and individual respondent levels. Respondents were 100 chemistry students in Gorontalo, who were differentiated in gender and adversity quotient. The results showed that the measurement instrument has good validity and reliability. In addition, it was found that students' abilities differed; some items responded differently regarding gender and adversity quotient. Most students tended to be weak in explaining the phenomenon of acid rain, the use of antacids for ulcer disease, the use of dolomite fertilizer, and the difference in the acidity level of HCl and H2SO4
Ekstraksi, Analisis Kuantitatif dan Bioaktivitas Virgin Coconut Oil (VCO) Salimi, Yuszda K; Syarbin, Ruslun A. R.; Yusuf, Novalita; Paputungan, Mardjan; Mohamad, Erni
Jambura Journal of Chemistry Vol 5, No 1 (2023): February
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jambchem.v5i1.21713

Abstract

Penelitian ini bertujuan untuk mengekstraksi Virgin Coconut Oil (VCO) dengan metode CEVCO (Cold Extaction Virgin Coconut Oil), FEVCO (Fermentation Extraction Virgin Coconut Oil), IEVCO (Inducement Extraction Virgin Coconut Oil), PEVCO (Papaya Extraction Virgin Cococnut Oil) dan NEVCO (Nanas Extraction Virgin Cococnut Oil). Pengujian kualitas berbagai metode ekstraksi VCO secara kuantitatif dianalisis sifat fisikokimia, analisis komposisi asam lemak dengan Kromatografi gas – spektrofotometri Massa (GC-MS), bioaktivitas daya hambat bakteri dengan metode difusi sumuran dan bioaktivitas antioksidan dengan metode diphenil pikril hidrazil (DPPH). Hasil penelitian ini menunjukkan bahwa perlakuan terbaik pada uji fisikokimia dengan metode CEVCO (kadar air 0,0044, asam lemak bebas 0,0029, bilangan peroksida 0,0012, bilangan iod 6,4719, bilangan penyabunan 255,25 dan pH 6) dan metode FEVCO, IEVCO memenuhi syarat standar nasional Indonesia (SNI). Hasil analisis komposisi asam lemak yang terbaik pada metode IEVCO yaitu terdapat asam laurat, asam palmitat, asam kaproat, asam kaprilat dan asam kaprat. Hasil pengujian organoleptik pada metode CEVCO memiliki kualitas yang terbaik dari segi warna, rasa dan aroma. Hasil pengujian daya hambat terhadap bakteri S. aureus sebesar (15,64) dan bakteri E. coli (15,90) pada metode IEVCO dengan konsentrasi 33,33% dan lama waktu 3 jam. Hasil pengujian bioaktivitas antioksidan metode NEVCO memiliki nilai IC50 45 dengan kategori aktivitas antioksidan sangat kuat.
ANALISIS KANDUNGAN UNSUR KALSIUM (CA) DAN KALIUM (K) SERTA PEMBUATAN PUPUK ORGANIK DARI SEDIMEN DANAU LIMBOTO Giu, Fitri Ani; Musa, Weni J.A; Bialangi, Nurhayati; Isa, Ishak; Mohamad, Erni; Kunusa, Wiwin Rewini
Jambura Journal of Chemistry Vol 6, No 1 (2024): February
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jambchem.v6i1.14694

Abstract

ABSTRAK Penelitian ini bertujuan untuk mengetahui kandungan Kalsium (Ca) dan Kalium (K) pada sedimen menggunakan metode kualitatif dan kuantitatif (AAS ). Pupuk organik menggunakan metode Kualitatif pada sedimen danau Limboto. Berdasarkan hasil penelitian uji kualitatif didapatkan kandungan unsur kalsium dan kalium pada sedimen dan uji kuantitatif kadar (Ca) 6,16%, 6,16% dan 5,73% dan Kalium (K) 0,10%, 0,09% dan 0,08% yang memenuhi standar kebutuhan tanaman. dan berdasarkan hasil pengujian kuantitatif di dapatkan pupuk organik dari Sedimen danau limboto mengandung kalsium dan tidak mengandung Kalium hal ini disebabkan pereaksi yang digunakan sudah teroksidasi Kata kunci : Danau Limboto, Sedimen, Pupuk Organik, Kalsium, Kalium, AAS.
Karakteristik Kimia Dan Organoleptik Asap Cair Tempurung Kelapa Dalam Menurunkan Cemaran Logam Timbal (Pb) Pada Ikan Cakalang (Katsuwonus pelamis) Djalil, Jhodi Pratama; Salimi, Yuszda K; Iyabu, Hendri; Bialangi, Nurhayati; Mohamad, Erni; Kunusa, Wiwin Rewini
Jambura Fish Processing Journal Vol 6, No 1 (2024): VOLUME 6 NOMOR 1, JANUARY 2024
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jfpj.v6i1.21715

Abstract

This research aims to determine the chemical characteristics of coconut shell liquid smoke and analyze the effectiveness of using liquid smoke in reducing Pb metal contamination in skipjack tuna (Katsuwonus Pelamis). Grade 2 liquid smoke from coconut shells is produced by the Pulubala IKM center through the stages of pyrolysis and distillation. This study employs a completely randomized design (CRD) with two replications. To determine the chemical characteristics of the liquid smoke, the analyzed methods include pH measurement, phenol content, total acidity, protein content, organoleptic value, and the chelating power of heavy metal Pb with variations in the concentration of liquid smoke test solutions AC (undiluted liquid smoke), AC2, AC4, AC6, and AC10 (liquid smoke with the addition of distilled water at 2%, 4%, 6%, and 10%). The results show that the best treatment is obtained from coconut shell liquid smoke with AC concentration (undiluted liquid smoke) having the best characteristics, namely a pH value of 4, phenol content of 1.6469%, total acidity of 14.94 mg/mL, protein content of 0.6083%, and a chelating power for heavy metal Pb of 97.32%. The results of the organoleptic test indicate that overall, the highest score was obtained with a neutral value at the concentration of AC2 (liquid smoke with the addition of 2% distilled water).
Pelatihan Pembuatan Pestisida Nabati Sebagai Alternatif Pengendalian Serangga Hama Tanaman Pada Petani Sayur di Desa Bulotalangi Timur Nurhayati Bialangi; Erni Mohamad; Mangara Sihaloho; Ahmad Kadir Kilo; Julhim S Tangio
Damhil: Jurnal Pengabdian kepada Masyarakat Vol 2, No 1: June 2023
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/damhil.v2i1.20825

Abstract

This service activity aims to provide training on making vegetable pesticides to farmers and housewives. As an alternative to controlling plant insect pests, the use of vegetable pesticides is considered safe to use. Botanical Pesticides are pesticides whose active ingredients come from plants or herbs and other organic materials which are efficacious in controlling pest attacks on plants. This pesticide does not leave harmful residues on plants or the environment and can be made easily using inexpensive materials and simple equipment. Vegetable pesticides are relatively easy to make with natural or vegetable ingredients which make these pesticides easy to decompose in nature so they don't pollute the environment. This organic pesticide is able to overcome and repel pests that destroy agricultural and plantation crops in general, such as fleas, caterpillars, grasshoppers and so on. The method used is direct training to groups of housewives and vegetable farmers using innovative technology. From the results of the implementation of these activities, the community was very enthusiastic about participating in these activities and was interested in making/producing their own pesticides from materials that are easy to obtain from the surrounding environment
Co-Authors Ahmad Kadir Kilo Akram La Kilo Alfian Erwinsyah Amalia Rizki Pautina Arviani Arviani Arviani Arviani Arwin, Muh Asmawati J. Salum Astin Lukum Bidilah, Siti Aulia Botutihe, Deasy N Botutihe, Deasy N. Djalil, Jhodi Pratama Djuandi Olii Erga Kurniawati Faiga Olifia Dg. Mangawe Fauziah N Kasim Fitria Naim Frida Maryati Yusuf Gevira Datungsolang giu, fitri ani Haris Munandar Hasan, Meiske Hendri Iyabu Intan J. Oputu Ishak Isa Ishka Isa Isna Rahayu Ningsih Jafar La Kilo Jafar La Kilo Julhim S Tangio Julhim S Tangio Julhim S Tangio Julhim S. Tangio Karim, Fadila karmila karmila Kostiawan Sukamto, Kostiawan La Alio La Ode Aman Laliyo, Lukman A.R Lanto Ningrayati Amali Lasim, Windi Sulistiyani Lilis Anggraini Lukman A. R. Laliyo Lukman A.R. Laliyo Mangara Sihaloho Mangara Sihaloho Mardjan Paputungan Marnila Marnila Masrid Pikoli Merlin Darise Meyrin Hamzah Miftahul Nur Mohi, Rindi Antika Muhamad Iksan Musa, Weni J.A Naim, Fitria Najmah, Najmah Nasadi, Nurlaila Neni Purnama Djaipano Netty Ino Ischak Nita Suleman Nur Fadillah Pulukadang Nur'afni Suaib Nurfadilah M. Kasim Nurhayati Bialangi Olii, Djuandi Opir Rumape Pakaya, Agustina H. Pautina, Amalia Rizki Perry Zakaria Perry Zakaria Perry Zakaria Pomuato, Sasmita Pratiwi One Priska Paramata Rahayu Ningsih, Isna Rahmat S Napu Rahmawati Hilala Ramli Utina Rindi Antika Mohi Roslina Imran Rustam I. Husain Said, Sriyanti S Sandi, Fadly Siti Aisa Liputo Sufriyanto Ibrahim Syarbin, Ruslun A. R. Thayban Thayban Umar Sako, Umar Usman, Yuyan Ali Widya A Habi Wiwin Rewini Kunusa Wiwiyani, Wiwiyani Yestin Takowa Yowan, Yowan Yusuf, Novalita Yuszda K Salimi Yuszda K. Salimi Zulfa K Muslimin