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Diana Eka Pratiwi
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Unit Publikasi Lantai 11 Gedung ICP FMIPA UNM Jln. Daeng Tata, Kampus UNM Parangtambung, Makassar, Indonesia 90224
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INDONESIA
SAINSMAT: Jurnal Ilmiah Ilmu Pengetahuan Alam
Published by Universitas Negeri Makassar
ISSN : 20866755     EISSN : 25795686     DOI : https://doi.org/10.35580/sainsmat
Core Subject :
The objective of this journal is to publish original, fully peer-reviewed articles on a variety of topics and research methods in sciences, mathematics, statistics, education, and applied science. The journal welcomes articles that address common issues in mathematics, sciences, statistics, education, applied science, and cross-curricular dimensions more widely.
Arjuna Subject : -
Articles 282 Documents
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The Effect of Acid Treatment on The Characteristics of Modernite Zeolite Sumiati Side; Suriati Eka Putri; Diana Eka Pratiwi; Aulia Rahma; Abd Rahman
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 2 (2023): Volume 12 Nomor 2 (September 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

This work investigated the use of acid treatment on the characteristics of zeolite mineral. The effects of treating zeolite with various acid solutions hydrochloric acid (HCl) and sulfuric acid (H2SO4) were measured using x-ray fluorescence (XRF), x-ray diffraction (XRD), and scanning electron microscope (SEM). The results showed an increase in the percentage of SiO2 and Al2O3 after zeolite activation, and also a decrease in the amount of impurities. The crystalline phase of the zeolite was carried out using XRD analysis, indicating the type of zeolite used is modernite. The SiO2 phase in the sample is quartz, and the Al2O3 phase is corundum. The average crystal size decreased after activation, from 14.23 nm to 6.85 nm for HCl and 5.42 nm for H2SO4. Furthermore, the surface morphology of all zeolite samples has a form of irregular spherical surface, and the surface size of the particles after activation shows a smaller particle shape. The results of this study are expected to become recommendations for further research related to natural zeolite pretreatment as a catalyst support.
Pengembangan LKPD IPA Untuk Meningkatkan Keterampilan Proses Sains: Systematic Literature Review Mery Berlian; Dindawini Salsabilla; Diniya; Kholid Junaidi; Rian Vebrianto
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 2 (2023): Volume 12 Nomor 2 (September 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

This research was conducted to analyze literature related to the development of Student Worksheets (LKPD) to improve students' science process skills. The objectives of this study include: 1) knowing Student Worksheets that can measure students' science process skills; 2) find out the material and educational level examined in the Student Worksheet to improve students' science process skills. The benefit of this research is to make it easier for researchers to obtain proper literature to be analyzed related to the title of the research that will be carried out by researchers. The method of this research is using the Systematic Literature Review (SLR) method, which is a method that consists of 4 steps including Identification, Screening, Eligibility and Included. The results of this study are obtained as many as 6 literature that is feasible to be analyzed. The results of the analysis of this article include; 1) There are several kinds of science worksheets that can measure science process skills, including Guided Inquiry, Learning Cycle 7E, Contextual Teaching and Learning (CTL), Nature of Science, Discovery Learning and Guided Inquiry. 2) The material that is widely used in the development of science worksheets to improve students' science process skills is Environmental Pollution by 49%. For this reason, the researcher recommends that there are six methods that can be used to improve skills and direct activities in the field during the learning process.
Analisis Cluster Fuzzy C-Means dan Diskriminan untuk Pengelompokan Data Kesejahteraan Rakyat Moh. Wahyu Warolemba; Resmawan; Dewi Rahmawaty Isa
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 2 (2023): Volume 12 Nomor 2 (September 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

Cluster analysis is a multivariate method that aims to classify objects into a cluster based on different characteristics. The statistical technique that can be used for clustering is Fuzzy C-means (FCM). The FCM uses membership degree to determine the existence of each data point in a cluster. To ensure accurate clustering and that the criteria are met, cluster validation must be done to produce good data clustering. Moreover, this study uses a discriminant analysis test to validate the results of cluster solutions. The study aims to classify 34 provinces in Indonesia based on the level of people's welfare. The data used in this study is data on indicators of people's welfare in Indonesia in 2021. The variables used in this study were age/life expectancy, the average length of schooling, the 16-18 years of enrollment, and households with proper access to water. Based on the study results, two clusters were formed: cluster 1, areas with low people’s welfare indicator values in 16 provinces, and Cluster 2, regions with high people's welfare indicator values in 18 provinces.
Bilangan Terhubung Total Pelangi pada Graf Hasil Operasi Korona Graf Buku(Bn) dan Graf Pensil(Pcm) Randi Mooduto; Lailany Yahya; Nisky Imansyah Yahya
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 2 (2023): Volume 12 Nomor 2 (September 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

Let G be a simple and finite graph. Rainbow connection and total rainbow connection c are set c : G → {1,2,. . . , k} where k is the minimal color on graph G. A rainbow connection number(rc) is a pattern by giving different colors to the connection edges (E(G)) so that a rainbow path is formed. The total rainbow connection number (trc) is a payment pattern by giving color to vertices (V(G)) and edges (E(G)) in graph G so that a total rainbow path is formed. This article discusses rainbow connection numbers (rc) and total rainbow connection numbers (trc) in the corona graph of book graph (Bn) and pencil graph (Pcm). The results obtained are rc(Bn ⨀ Pcm) = 2n+3 and trc(Bn ⨀ Pcm) = 4n+5, 3 ≤ n ≤ 5.
Analisis Perkuliahan Daring Konsep Dasar IPA: Study Kasus Nasrah; Rr. Yuliana Purwanti; A. Muafiah Nur
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 2 (2023): Volume 12 Nomor 2 (September 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

This research is expected to be able to find out the constraints of lectures on Basic Science Concepts based on the perception of the lecturer, to obtain solutions to overcoming problems related to low student learning outcomes achievement. The qualitative descriptive method with 4 respondents out of 10 lecturers in the Study Program of Natural Sciences for Elementary School Teacher Education at the Muhammadiyah University of Makassar. The results and discussion are reviewed from four aspects, namely (1) Use of lecture models/strategies/methods; (2) Use of learning media; (3) Problems and challenges faced by lecturers when delivering the learning material; (3) Student's challenges in attending learning activities; (4) Solutions provided by lecturers in overcoming learning problems. Based on the triangulation processing method and data analysis from Miles and Huberman, it was concluded that although lecturers are not constrained in delivering lecture materials, successful learning requires significant related efforts by students. Active learning that emphasizes presentation, discussion, and question-and-answer methods is highly recommended to ensure the full engagement of students in the online study sessions.
Isolasi dan Karakterisasi Bakteri Indigenous Potensial Pendegradasi Isoprofilamina Glifosat dari Lahan Budidaya Bawang Merah di Kabupaten Enrekang Hilda Karim; Sahribulan; Muhammad Junda; Norna
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 2 (2023): Volume 12 Nomor 2 (September 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

This study aims to determine the types of bacteria found in soil exposed to pesticides with the active ingredient Isopropylamine Glyphosate by characterizing the bacteria morphologically and physiologically. Soil samples were taken from shallot plantations in Baraka District, Enrekang Regency. The method in this study was to isolate soil samples at a depth of 10 cm and 20 cm, the bacterial isolates found were then grouped based on the morphological and physiological characters of the isolates found. At the isolation stage, pesticides were treated with concentrations of 10 ppm, 20 ppm and 30 ppm. The results of the study on a 10 cm depth soil found bacteria from the genus Pantoea and Clostridium. At a concentration of 10 ppm, 2 isolates were obtained, at a concentration of 20 ppm, 2 isolates were obtained, and at a concentration of 30 ppm, 1 isolate was found. Meanwhile, at a depth of 20 cm, bacteria from the genera Pantoea, Clostridium, Pseudomonas, and Erwinia were found. At a concentration of 10 ppm found 4 isolates, a concentration of 20 ppm 2 isolates and a concentration of 30 ppm found 1 isolate. The results showed that the genera Pantoea, Clostridium, Pseudomonas, and Erwinia, were able to survive in soil exposed to pesticides.
Sebaran Jaringan Penakar Hujan di DAS Jeneberang Menggunakan Metode Polygon Thiessen Haris; Nasrul; Muhammad Arib Musba Amalul; Sulaiman Ziddiq; Misdar Amdah; Medar M. Nur; Rosmini Maru
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 2 (2023): Volume 12 Nomor 2 (September 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

The Jeneberang River has a watershed that covering an area of 860 km2. At the same time, the area of the river reaches 9,33 km2 with surface water potential of 13,23 million/year and groundwater potential of 1,504 million/year. The rain gauge network is influenced by several factors, included the rainfall factor, so collecting data on the rain gauge network stations is necessary. Based on this, it is necessary to map the rain gauge network and the optimum value of the rain station. This study uses the Polygon Thiessen method based on statistical principles, which are then presented through maps from processed data using ArcGIS Desktop 10.8. From the results of calculating the average rainfall data for the Jeneberang Watershed using the polygon thissen method, the average regional rainfall in 2011-2020 was 2,958.83 mm and it was obtained that rain stations in the Jeneberang Watershed area with an area of 133,218 km2 should have 6.1 stations and there should be 6 (six) stations.
Studi Adsorpsi Logam Fe (III) Menggunakan Komposit Kitin Silika Sekam Padi Muftihatu Rahma; Hasri; Diana Eka Pratiwi
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 2 (2023): Volume 12 Nomor 2 (September 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

This study aims to determine the optimum pH and adsorption capacity of Fe(III) metal adsorption using chitin- silica composite rice husk. The research phase includes the manufacture of sodium silicate, manufacture of chitin- silica composites, determination of optimum pH and adsorption capacity of Fe(III) metals. Preparation of sodium silicate is done by dissolving using NaOH. Chitinsilica rice husk composites were prepared by reacting sodium silicate solution with chitin. The characterization of chitin-silica composites included functional group analysis using FTIR and morphological analysis using SEM. The adsorption process was carried out with variations in pH (2-6), variations in concentration (50-150 ppm). The results showed that the optimum pH for the adsorption of Fe(III) metals was 4 with the adsorption power 91,42%. The adsorption capacity of Fe(III) metal with concentrations of 50, 80, 100 and 150 ppm were 31.49 mg/g, respectively; 69.69mg/g; 89.83 mg/g and 138.57 mg/g. The adsorption of Fe(III) metal is more suitable for the Langmuir isotherm model compared to Freundlich with a value of R2 = 0.9414.
ProfilingPigmented PlantsCell Membrane Permeability on Different Solvents Condition Afif Eka Rahma Setiyanto; Aisyah Fajriati; Nifda Nurika; Shofiyyah Adiibah Lillah
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 2 (2023): Volume 12 Nomor 2 (September 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

This study aims to observe the profiling pigmented plant cell membrane permeability on different solvents condition. Carrot, turmeric, and purple sweet potato specimens were soaked in different organic solvents, namely 35% alcohol, 70% alcohol, cold water, and room temperature water. The research method used is descriptive quantitative. Data collection is done by documentation. The dependent variable of this research is the final concentration of the organic solvent and the first time the organic solvent changes color (release time). The results show that each specimen has different results. Carrots produce a low concentration of alcohol with a release time of 20-35 minutes and do not change the color of the water. Turmeric and purple sweet potato produce a higher concentration of alcohol than water. Turmeric and purple yam release time on alcohol is 5 minutes and is faster than the release time of turmeric and purple yam on water. The best solvent for the three specimens is 70% alcohol because it produces the highest concentration and the fastest release time.
Pengembangan Bahan Ajar IPA Berbasis Flipbook untuk Meningkatkan Kemampuan Berpikir Kreatif pada Siswa SMP/MTs Resita Nova Elisya; Sri Wahyuni; Nur Ahmad
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 1 (2023): Volume 12 Nomor 1 (Maret 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

This study purpose to determine the validity, practicality, and effectiveness of flipbook-based teaching materials to improve students' creative thinking skills. The subjects of the study were 25 students in class VII C SMP 2 Maesan. The research design is a One Group Pre-Test and Post-Test Design. Learning activities were carried out in 5 meetings consisting of 1 pre-test meeting, 3 learning process meetings and 1 post-test meeting. Retrieval of data from the validity of teaching materials, test scores, observation and questionnaires. The data were analyzed using descriptive statistical analysis. The results of validity of the teaching materials were assessed by three validators having an average percentage of 90% in the very valid category (2) The practicality of the teaching materials assessed by three observers had an average percentage 89.5% in the very practical category (3) the effectiveness of the teaching materials was obtained from the N-gain value with an average score of 0.64 in the medium category and the student response questionnaire has a percentage of 81.8% including the very good category. The conclusion study is that flipbook-based teaching materials can improve students' creatiive thinking skills in the science subject matter of motion and style.

Page 21 of 29 | Total Record : 282

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