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All Journal Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Akademika Kimia Ideguru: Jurnal Karya Ilmiah Guru Jurnal Riset Pendidikan MIPA Media Eksakta Jurnal Akademika Kimia Journal of Social Science Jurnal Banua Oge Tadulako JIPI (Jurnal IPA dan Pembelajaran IPA) Jurnal Akademika Kimia
Paulus Hengky Abram
Program Studi Pendidikan Kimia, Fakultas Keguruan Dan Ilmu Pendidikan, Universitas Tadulako, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Education Environmental Science Mathematics Physics Social Sciences Other

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The Effects of Principal Leadership on Work Motivation and Performance of Teachers to Improve the Learning Outcomes on Science of the Fifth Grade Students of SD Tojo Una-Una Regency Saiyan, Kamir Apoka; Rede, Amram; Abram , Paulus Hengky
Jurnal Riset Pendidikan MIPA Vol. 2 No. 2 (2018)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j25490192.2018.v2.i2.pp110-121

Abstract

The study aimed to determine whether there is an influence between the principal leadership on the learning outcomes on the science of the fifth-grade students of SD Tojo Una-Una Regency and to improve performance of teachers in improving learning outcomes on the science of the fifth-grade students of SD Tojo Una-Una Regency. This study used a type of quantitative research. The instruments in this study were a questionnaire sheet. The instrument test used Validity Test and Reliability Test. The data analysis technique used the t-test technique which is preceded by an analysis prerequisite test, namely the normality test and linearity test. P-value results of the normality test on the principal's leadership value (0.28)> 0.05 and student learning outcomes (0.17)> 0.05. thus, the data obtained were normally distributed. Therefore, the principal leadership can influence work motivation and performance of teachers, so that student learning outcomes also increase.
ANALISIS KADAR KALSIUM OKSIDA (CaO) PADA BATU KARANG DI DAERAH PESISIR BAYANG DAMPELAS DONGGALA Annisa Dian Islamiyati; Paulus Hengky Abram
Media Eksakta Vol 16 No 1 (2020)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (352.949 KB) | DOI: 10.22487/me.v16i1.734

Abstract

Coral reefs are classified as coral or coral limestone. These corals contain of a high level of calcium purity with more than 90%. These clacium are in the from calcite (CaCO3). Calcite can be used in the industrial sector wich can be processed into a catalyst and use as a mixture 0f portland cement.its economic value increases by converting CaCO3 to CaO trough the calcination process at high temperatures. The coral sampels were taken from the coastal area of Bayang, Dampelas Donggala wich consisted of 2 samples. i.e coastal and montain coral reefs. The CaO levevls contained in coral reefs wer determined by qualitative and quantitative analysis method using XRF (X-Ray Fluorescence). XRF result showed that were CaO compounds in each coral reef sample. The CaO level in the coastal reef was 92,08% before calcination and 92,11% after calcination. Whereas the CaO level in te mountain coastal reef was 94,51% before calcination and 96,77% after calcination.
ANALISIS JENIS DAN KANDUNGAN LOGAM PADA BATUAN BUANGAN DARI PERTAMBANGAN EMAS POBOYA Rika Rahayu; Paulus Hengky Abram
Media Eksakta Vol 16 No 2 (2020)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (375.529 KB) | DOI: 10.22487/me.v16i2.743

Abstract

Metals has an important role for human life, especially in the industrial field. The purpose of this research is to find out the metal type and content in waste rock from the Poboya gold mine. The sampling technique is done by grabbing sampling, which is to take a lump of rock at a mining site. The analytical method used to determine the content and percentage of elements in rocks is XRF (X-Ray Fluorescence) spectrophotometry. The analysis results show that the metals contained in the waste rock from Poboya gold mining are Silicon (Si), Iron (Fe), Potassium (K), Aluminium (Al), Calcium (Ca), Titanium (Ti), Arsenic (As), Zirconium (Zr), Manganese (Mn), Strontium (Sr), Barium (Ba), Rubidium (Rb), Zinc (Zn), Niobium (Nb), Indium (In), Tin (Sn) and Stibium/Antimony (Sb). The highest percentage metals are Silicon 52.98% and Iron 23.56%. Based on these results, the high content of silica oxide and iron oxide in waste rock from Poboya has the potential as a basis to be used for making nano materials, especially nano silica and ferromagnetic materials.
POLYMERIZATION OF EUGENOL USING A CONCENTRATED NITRIC ACID (HNO3) CATALYST AND MEDIA OF ACETIC ACID (CH3COOH) Denliana H.N. Pakaya; Paulus Hengky Abram
Media Eksakta Vol 16 No 2 (2020)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (463.726 KB) | DOI: 10.22487/me.v16i2.745

Abstract

Eugenol is a paleyellow oily liquid which can be extracted from essential oils such as clove and cinnamon oils. This study aimed to modify eugenol and to reduce environmental pollution caused by polymers by utilizing natural materials through polymerization of eugenol with concentrated nitric acid (HNO3) and media of acetic acid (CH3COOH). Various of acetic acid media used were 5%, 25%, and 50%. The result of polieugenol was blackish brown, in the form of shiny gels, smelling of cloves, and soluble in ethanol, slightly soluble in chloroform and insoluble in benzene and water. The product polieugenol was washed with aquades. The yields before washing were 142.75%, 141.25% and 138.75%, and the yield after washing were 88.265%, 88.397% and 87.248%. The Fourier Transform InfraRed (FT-IR) spectrophotometer results showed that the polymerization did not occur perfectly showing by absorption peaks of CH=CH2 and C = C groups at 995.27 and 1635.89 cm-1.
Penentuan Kadar Natrium (Na) dan Kalsium (Ca) Pada Air Laut Desa Posona Burhan Burhan; Suherman Suherman; Paulus Hengky Abram
Media Eksakta Vol 17 No 1 (2021)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (297.815 KB) | DOI: 10.22487/me.v17i1.821

Abstract

It has been done a study on the determination of sodium (Na) and calcium (Ca) levels in seawater at Posona Village. The aims of this study were to determine the levels of sodium (Na) and calcium (Ca) in seawater in Posona village. The tools used were an atomic absorption spectrophotometer (AAS) and a flame photometer. Seawater samples were taken in the morning and afternoon in 3 distance points: 50 meters, 100 meters, and 150 meters from the edge of the land surface of the seashore. The level of sodium (Na) was measured at wavelengths of 589 nm while calcium (Ca) at a wavelength of 422.7 nm. The results of the study obtained the sodium levels in the morning samples with a distance of 50 m, 100 m, and 150 m amounted of 18.076 mg/L, 18.395 mg/L, and 18.715 mg/L. While the afternoon samples for the sodium (Na) levels was 18.475 mg/L, 18.742 mg/L, and 18.249 mg/L, respectively. The results of the analysis of calcium levels in the morning samples were 8.431 mg/L, 8.8 mg/L, and 7.661 mg/L, whereas in the afternoon for calcium (Ca) levels were 9.415 mg/L, 9.231 mg/L, and 7.692 mg L, respectively.
Analysis of Hard Water Coagulation in Water Sources of Kawatuna using Aloe Vera Plant Baby Melyta Pallar; Paulus Hengky Abram; Purnama Ningsih
Jurnal Akademika Kimia Vol. 9 No. 2 (2020)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.584 KB) | DOI: 10.22487/j24775185.2020.v9.i2.pp125-132

Abstract

Aloe vera gel is one of the plants that can be used as a natural coagulant. The chemical content in aloe vera has similarities to the cactus with the presence of mucilage or gel which can be used to purify water. This study aimed to determine the ability of aloe vera gel as a natural coagulant for water purification of Kawatuna water source and to determine the optimum volume of aloe vera gel. The steps of the study were preparing water sample, preparing aloe vera gel, coagulating of water, and analyzing parameters of water qualities i.e hardness, turbidity, color, temperature, pH, and total dissolved solids (TDS). The results showed that aloe vera gel was able to be used as a natural coagulant to purify water with the optimum ratio of 1 mL of aloe vera gel in 500 mL of the water sample. Aloe vera gel reduced turbidity, hardness, and color by 58.33, 15.45, and 50.36%, respectively, with a pH of 4.1, temperatures at 30 oC, and TDS of 77.51%. This study concluded that aloe vera gel able to be used as a coagulant to purify water.
The Influence of Problem Based Learning Model (PBL) Using Lesson Study (LS) Pattern on Quality of Chemistry Learning in SMAN 1 Banawa Nur Hikmah; Paulus Hengky Abram; Suherman Suherman
Jurnal Akademika Kimia Vol 8, No 1 (2019)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (641.638 KB)

Abstract

This study aimed to determine the effect of problem based learning model (PBL) using Lesson Study (LS) pattern on the quality of chemistry learning at SMAN 1 Banawa. This research type was a quasi-experiment with design equivalent pretest-posttest design. The sample used in this research was the students of class XI MIPA 3 as the experiment with the amount of 32 students and students of class XI MIPA 4 as the control class with the amount of 33 students. The result of data analysis obtained, the mean value of experiment class ( ) was 74.03 and the control class ( ) was 69.84. The average of students’ activity in the experimental and control class respectively was 56.66%, and 56.66% that was categorized as active enough. The result of hypothesis testing with two-party of t-test statistic obtained was –ttable< tcount> +ttable(tcount = 5.37 dan ttable = 1.67) with a significance level α = 0.05 and degrees of freedom 63, H0 was rejected and Ha was accepted based on the results of data analysis. So it can be concluded that there is influence of PBL model using LS pattern on the quality of chemistry learning in SMAN 1 Banawa.
THE UTILIZATION OF DURIAN PEELS (Durio zibethinus) FOR THE MANUFACTURING OF CHARCOAL BRIQUETTES AS ALTERNATIVE FUEL Sitti Rahmawati; Rabasia; Afadil; Suherman; Tri Santoso; Vivi Diah Sangkota; Paulus Hengky Abram
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 13 No 1 (2023): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.13.1.76-87

Abstract

Kulit durian adalah limbah biomassa yang dapat dimanfaatkan sebagai bahan bakar alternatif menjadi briket arang. Kulit durian mengandung bahan yang mudah terbakar yaitu selulosa yang tinggi (50%-60%) dan lignin (5%) serta pati yang rendah (5%). Penelitian ini bertujuan untuk mengetahui karakteristik briket arang dari limbah kulit durian menggunakan perekat dari pati sagu sebagai bahan bakar alternatif. Perekat yang digunakan adalah perekat dari tepung sagu yaitu 3% dari berat arang yang digunakan. Dalam penelitian ini digunakan arang sebanyak 500 g, sehingga bahan perekat yang digunakan adalah 15 g. Hasil pengujian mutu produk briket berbahan baku kulit durian diperoleh nilai kalor (5189.128 kal/g), nilai kadar air (3,6044%), nilai kadar abu (3,5643%), nilai kadar zat menguap ( 21,1273%), dan nilai kadar karbon terikat (69,2279%), kerapatan (0,4778 g/cm3), laju pembakaran (0,22 g/sekon). Briket yang dihasilkan dari limbah kulit durian dengan menggunakan pati dari sagu sebagai perekat dapat dijadikan sebagai bahan bakar alternatif yang ramah lingkungan
IDENTIFIKASI MISKONSEPSI SISWA PADA MASA PANDEMI COVID-19 MENGGUNAKAN TES DIAGNOSTIK THREE-TIER PADA MATERI LARUTAN PENYANGGA KELAS XI SMA NEGERI 3 POSO DI KABUPATEN POSO Tri Ulandari Astaring; Minarni Rama Jura; Kasmudin Mustapa; Paulus Hengky Abram
JURNAL BANUA OGE TADULAKO Vol 1 No 2 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (213.102 KB) | DOI: 10.22487/jbot.v2i1.2007

Abstract

Tri Ulandari, 2020. "Identification of student misconceptions during the Covid-19 pandemic using a three-tier diagnostic test on material for class XI at SMA Negeri 3 Poso in Poso district". Thesis, Chemistry Education Study Program, Department of Mathematics and Natural Sciences Education, Faculty of Teacher Training and Education, Tadulako University, Supervisor: Minarni Rama Jura. this study aims to determine the level of misconceptions in class XI students of SMA Negeri 3 Poso using a quantitative descriptive approach to the buffer solution material during the covid-19 pandemic. The subject of this research consisted of 36 students. The sampling technique was simple random sampling. The research instrument used was a three-tier multiple choice diagnostic test (Three-tier) with a total of 10 questions. Based on the results of research and data analysis showed that the percentage of understanding concepts as much as 23.33%, students' misconceptions as much as 42.78%, and not understanding concepts as much as 33.89%. Based on the results of the percentage of students who experienced misconceptions (False Positive) as many as 11.39%, misconceptions (False Negative) as many as 11.11%, misconceptions as much as 20.28%. Misconceptions still occur in each indicator in the buffer solution material, where the highest misconception is in item number 8 with an indicator for determining the characteristics of a buffer solution in an acid or alkaline state with a percentage of 50%, item numbers 9 and 10 with an indicator explaining how to make a solution. buffer with each percentage of 47.22%. The lack of students' understanding of the buffer solution material is the main factor causing misconceptions, coupled with the pandemic situation which requires students to study more independently, causing limited communication between teachers and students. Thus, the results in the category of misconceptions of SMA Negeri 3 Poso students are in the medium category. The results of this study are expected to be a source of information as well as a motivation and reference for teachers and students to be able to understand chemistry better so as to minimize the occurrence of misconceptions in students.
Pengaruh Variasi Waktu Fermentasi Terhadap Aktivitas Antioksidan Pada Minuman Kombucha Pulpa Kakao (Theobroma cacao L) Endang Sri Rahayu; Paulus Hengky Abram
Media Eksakta Vol 19 No 1 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/me.v19i1.2405

Abstract

The purpose of this study is to determine the antioxidant activity based on the effect of fermentation variation time of cocoa pulp kombucha drink (Theobroma cacao L.). The sample used in this study is cocoa pulp obtained from yellow cocoa pods the plantation in Sibualong Village, Balaesang District, Donggala Regency. DPPH method is used to see the reduction of free radical occurs caused by antioxidant compounds in fermented cocoa pulp kombucha drink. Antioxidant activity absorbances measured by UV/Vis will be calculated by regretion equation. The value obtained from the regretion equation shows the IC50 value, if the IC50 value is below 50 ppm it indicates a very strong antioxidant activity and if the IC50 value is above 200 ppm it indicates a very weak antioxidant activity. The study show, there to effect of fermentation variation time of the antioxidant activity which is identified by the increasing of IC50. The study shows, there to effect of fermentation variation time of the antioxidant activity which is identified by the increasing of IC50, with IC¬50 values 3rd, 10th and 14th days respectively are 29,387 ppm, 322,404 ppm, and 215,298 ppm. So the best fermentation time is 3 days which shows the IC50 value less than 50 ppm so that the antioxidant activity is included in the very good category.
Co-Authors Afadil Agustin Tiwow Amram Rede, Amram Anang Wahid M.Diah Annisa Dian Islamiyati Asnila Asnila Baby Melyta Pallar Baharuddin Hamzah Burhan Burhan Denliana H.N. Pakaya Endang Sri Rahayu Erna Erna, Erna Fadlian, Fadlian Hildawianti, Hildawianti Intan, Dey Jamaludin M Sakung Kasmudin Mustapa Minarni Rama Jura Minarni Rama Jura Muhammad Agus Muljanto Mujariah, Mujariah Nur Hikmah Nurdin Rahman Purnama Ningsih Pusung, Widya Astuti Rabasia Rika Rahayu Roslina Roslina, Roslina Rozi, Fachrul Saiyan, Kamir Apoka Sangkota, Vivi Dia A. Setiawati, Eka Lilis Siang Tandi Gonggo Sitti Rahmawati Sri Hastuti V. Pulukadang Suherman Suherman Suherman Suherman Suherman Sulniawati, Sulniawati Tri Santoso Tri Ulandari Astaring Unggul Wahyono Vanny M.A. Tiwow Wartini, Ni Ketut Yinangsih Safitri