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All Journal International Journal Of Science, Technology & Management (IJSTM) International Journal of Science and Environment MetaBio : Jurnal Pendidikan
Rosenta Purba, Ika
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PENGARUH MODEL PEMBELAJARAN PROBLEM BASED LEARNING (PBL) TERHADAP HASIL BELAJAR SISWA PADA MATA PELAJARAN SISTEM PERNAPASAN MANUSIA DI KELAS XI SMA SWASTA KARTIKA I-4 PEMATANGSIANTAR TAHUN AJARAN 2021/2022 Asriyati, Dewi; Wilson Sitopu, Joni; Rosenta Purba, Ika
Jurnal Metabio Vol. 4 No. 2 (2022): MetaBio : Jurnal Pendidikan (Edisi Elektronik)
Publisher : Program Studi Pendidikan Biologi, Fakultas Keguruan Dan Ilmu Pendidikan Universitas Simalungun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36985/4aytt383

Abstract

This study aims to determine the differences in student learning outcomes and the magnitude of the differences in student learning outcomes using the problem-based learning model and conventional methods on the human respiratory system material in grade XI of SMA Swasta Kartika I-4 Pematangsiantar in the 2021/2022 academic year. The population was 193 students consisting of 4 classes and the sample was taken using cluster random sampling to obtain 2 classes: the experimental class (XI mia 1) with 48 students and the control class (XI mia 3) with 48 students. The experimental class was treated using the problem-based learning model and the control class was treated using the conventional method. Data analysis was carried out by finding the average (X̅ ), standard deviation (S) and hypothesis testing (t-test) at a significance level of α = 0.05. From the results of the study, the average post-test score for the experimental class was 83.02 and the control class was 80.10 with a difference in learning outcomes of 2.29. From the results of the hypothesis testing (t-test), the calculated t (2.721 > t table (1.985) was obtained at a significance level of α = 0.05 and degrees of freedom (df) = 94, so Ho is rejected and Ha is accepted, meaning there is a difference in student learning outcomes using the problem-based learning model and the conventional method on the human respiratory system material in grade XI of SMA Swasta Kartika I-4 Pematangsiantar in the 2021/2022 academic year. It was concluded that there is a difference in student learning outcomes using the problem-based learning model and the conventional method on the human respiratory system material in grade XI of SMA Swasta Kartika I-4 Pematangsiantar in the 2021/2022 academic year. 
PERBANDINGAN HASIL BELAJAR SISWA DENGAN MENGGUNAKAN MODEL PEMBELAJARAN NUMBERED HEAD TOGETHER PADA MATERI SALING KETERGANTUNGAN DALAM EKOSISTEM DI KELAS VII MTs NEGERI TANAH JAWA T.P 2014/2015 Winda Afriza, Afni; Rosenta Purba, Ika
Jurnal Metabio Vol. 4 No. 1 (2022): MetaBio : Jurnal Pendidikan (Edisi Elektronik)
Publisher : Program Studi Pendidikan Biologi, Fakultas Keguruan Dan Ilmu Pendidikan Universitas Simalungun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36985/81denm75

Abstract

This study aims to determine differences in student learning outcomes using the Numbered Heads Together learning model. This research is an experimental study with a pre-test, post-test design. The population was 203 students, and the sample size was 80 students (Cluster Random Sampling). Class VII-2 served as the experimental class, and class VII-4 as the control class. Data analysis was conducted by calculating the average score and standard deviation, and hypotheses were tested using the t-statistic or t-test at a significance level of α = 0.05. The average pre-test score for the experimental class was 44.25, and the average post-test score for the experimental class was 78.37. The average pre-test score for the control class was 38.50, and the average post-test score for the control class was 65.25. This indicates an improvement in the topic of interdependence in ecosystems in class VII of MTs Negeri Tanah Jawa in the 2014/2015 academic year, with a score of 34.12. The results of the hypothesis test using the t-test obtained a calculated t (7.68) > t table (2.00), therefore H0 is rejected and Ha is accepted, meaning there is a difference in student learning outcomes using the Numbered Heads Together learning model on interdependence in ecosystems in grade VII MTs Negeri Tanah Jawa in the 2014/2015 academic year. It was concluded that there is a significant difference in learning outcomes using the Numbered Heads Together learning model on interdependence in ecosystems in grade VII MTs Negeri Tanah Jawa in the 2014/2015 academic year. 
PENGARUH MOTIVASI DAN MINAT BELAJAR TERHADAP KOMUNIKASI KEMAMPUAN STATISTIK MAHASISWA (VIRTUAL) FKIP USI PEMATANGSIANTAR TA 2021/2022 Wilson Sitopu, Joni; Rosenta Purba, Ika
Jurnal Metabio Vol. 3 No. 2 (2021): MetaBio : Jurnal Pendidikan (Edisi Elektronik)
Publisher : Program Studi Pendidikan Biologi, Fakultas Keguruan Dan Ilmu Pendidikan Universitas Simalungun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36985/dc3z0k87

Abstract

The problem in this study is that online learning has decreased student motivation and interest, with only a few participating and being active in learning. The purpose of this study was to determine the influence of learning motivation and interest on the communication skills of statistical students (Virtual) at the Faculty of Teacher Training and Education, University of Indonesia (USI), Pematangsiantar, in the 2021/2022 academic year. This research is descriptive quantitative, with conclusions drawn through statistical analysis. The population and sample in this study were all fourth-semester students of the Biology Education study program at the Faculty of Teacher Training and Education, University of Indonesia (USI), Pematangsiantar, in the 2021/2022 academic year. Data were obtained through a questionnaire. The questionnaire was previously tested for data normality and linearity. The data analysis techniques used were simple linear regression analysis, t-test, R2 test, and F-test. The conclusion from the F-test was that F = 4.510, with a Sig. (2-tailed) value of 0.020, less than 0.05 (5%). This means that Ho is rejected and Ha is accepted. In conclusion, learning motivation significantly influences the statistical communication skills of (Virtual) students at the Faculty of Teacher Training and Education, University of Indonesia (USI) Pematangsiantar in the 2021/2022 academic year. The coefficient of determination obtained was 0.195. Based on the results of a simple linear regression test, Y = 58.300 + 0.119 X1 + 0.325 X2. 
PERBANDINGAN HASIL BELAJAR SISWA DENGAN MENGGUNAKAN MODEL PEMBELAJARAN GROUP INVESTIGATION DAN NUMBERED HEAD TOGETHER PADA MATERI PENCEMARAN LINGKUNGAN DI KELAS VII SMP NEGERI 8 PEMATANGSIANTAR TAHUN PELAJARAN 2019/2020 Rosenta Purba, Ika
Jurnal Metabio Vol. 3 No. 2 (2021): MetaBio : Jurnal Pendidikan (Edisi Elektronik)
Publisher : Program Studi Pendidikan Biologi, Fakultas Keguruan Dan Ilmu Pendidikan Universitas Simalungun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36985/xej5qh57

Abstract

This study aims to determine the differences in student learning outcomes using the Group Investigation and Numbered Heads Together learning models on environmental pollution in seventh-grade students at SMP Negeri 8 Pematangsiantar in the 2019/2020 academic year. The population in this study was all seventh-grade students at SMP Negeri 8 Pematangsiantar in the 2019/2020 academic year, consisting of eight classes with a total of 340 students. The sampling process was carried out using random class or cluster random sampling to obtain two classes: class VII-D as experimental class I using the Group Investigation learning model and class VII A as experimental class II using the Numbered Heads Together learning model. Data analysis was carried out by finding the average value, standard deviation, and hypotheses were tested using statistics or the t-test at a significance level of α = 0.05. The results obtained the average pre-test scores of experimental class I and experimental class II were 44.86 and 40.27, respectively. The post-test scores of experimental class I and experimental class II were 83.78 and 87.03 with a difference of 3.25. From the results of the hypothesis test using the t test, it was obtained that t count (2.517) > t table (1.66629), so Ha was accepted and H0 was rejected, meaning there was a difference in student learning outcomes using the Group Investigation and Numbered Head Together learning models on environmental pollution material for class VII of SMP Negeri 8 Pematangsiantar in the 2019/2020 academic year. It was concluded that there was a difference in student learning outcomes using the Group Investigation and Numbered Head Together learning models on environmental pollution material for class VII of SMP Negeri 8 Pematangsiantar in the 2019/2020 academic year. 
ANALISIS MODEL PROBLEM BASED LEARNING MENGGUNAKAN QUASI EKSPERIMEN DESIGN TERHADAP HASIL BELAJAR IPA SISWA SMP aNEGERI 1 JORLANG HATARAN Rosenta Purba, Ika
Jurnal Metabio Vol. 3 No. 1 (2021): MetaBio : Jurnal Pendidikan (Edisi Elektronik)
Publisher : Program Studi Pendidikan Biologi, Fakultas Keguruan Dan Ilmu Pendidikan Universitas Simalungun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36985/7d91av62

Abstract

The Problem-Based Learning (PBL) model, or problem-based learning, is essential for science classes at the junior high school (SMP) level. This learning model can improve students' thinking skills, instill personal and social character values, and foster academic achievement through improved student learning outcomes. This study demonstrated a higher average post-test score (8.04) compared to the control class that did not implement the PBL model (6.87), a difference of 1.17 points. 
Trends and Knowledge Gaps In Fish-Based Fermented Foods: A Bibliometric Analysis From The Last Decade (2015-2024) Mamangkey, Jendri; Grovy Naibaho, Frans; Rosenta Purba, Ika; Yusriya Hibatullah, Alnadia; Aryanti Pada Soa, Christina
International Journal of Science, Technology & Management Vol. 6 No. 6 (2025): November 2025
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v6i6.1369

Abstract

Fish-based fermented foods are integral to traditional diets across Asia, Africa, and Europe, valued for both their nutritional role and cultural significance. Increasingly, they are also studied for potential functional properties such as probiotic activity and bioactive compounds, yet their global research landscape has not been systematically assessed. This study presents a bibliometric analysis of global research on fish-based fermented foods published between 2015 and 2024. Data were retrieved from the Scopus database and analyzed using the Bibliometrix R package and Biblioshiny interface. A total of 263 documents were identified across 145 sources, authored by 1,150 researchers. The field has shown rapid growth, with an annual publication increase of 27.01% and an average of 28.48 citations per article, indicating strong scholarly visibility. Most contributions originated from East and Southeast Asia, particularly China, South Korea, and Thailand, reflecting the cultural and culinary importance of fermented fish in these regions. Author productivity followed Lotka’s law, with a small group of core researchers driving sustained output. Keyword co-occurrence and thematic mapping revealed dominant clusters around fermented fish sauce, lactic acid bacteria, and microbial diversity, alongside emerging themes related to fatty acids and bacterial communities. Despite these advances, the analysis highlighted notable gaps, including limited international collaboration and underrepresentation of research from Africa and parts of South Asia. These findings suggest that while the field is expanding and diversifying, greater cross-regional engagement and methodological innovation are needed to fully explore the nutritional, functional, and socio-economic dimensions of fish-based fermented foods.
Plankton Diversity in Aek Rao River Gunung Tua Rosenta Purba, Ika; Harahap, Arman
International Journal of Science, Technology & Management Vol. 3 No. 6 (2022): November 2022
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v3i6.687

Abstract

The purpose of this study was to determine the index of plankton diversity in the Aek Rao River, Gunung Tua. The research was carried out from April to May 2022 in the Aek Rao River, Gunung Tua. The sampling method used purposive random sampling which consisted of 3 observation stations, namely station 1 upstream, station 2 for residential areas and station 3 for densely populated areas. The results showed that the composition of plankton in the Aek Rao River, Gunung Tua consisted of 3 classes of phytoplankton, namely Bacillariophyceae, Chlorophyceae and Cyanophyceae, while the zooplankton class consisted of 4 classes, namely Mastigophora, Monogononta, Crustacea and Ciliophora. The highest diversity index in phytoplankton was obtained at station 1 of the sand mining area with a value of 1, 39 which indicates that the level of diversity is in the medium category. In zooplankton the highest diversity index was found at station 3 with a value of 0.33 which indicated that the level of diversity was included in the low category. While the highest dominance index for phytoplankton was found at station 3 in densely populated areas with a value of 0.43 while zooplankton was found at station 1 in a sand mining area with a value of 0.00563, both values ??indicated that there was no dominant plankton genus in that area.
Study Phytoplankton as a Bioindicator of Asahan River Water Quality Rosenta Purba, Ika
International Journal of Science, Technology & Management Vol. 7 No. 1 (2026): January 2026
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v7i1.1405

Abstract

This study aims to determine the types of phytoplankton, phytoplankton abundance, factors that influence phytoplankton life and the quality of the Asahan River based on phytoplankton abundance. The method used is descriptive. The results of the study in the waters of the Asahan River obtained 13 types of phytoplankton, with a species abundance of 4875 ind/L. The quality of the Asahan River is moderately polluted as seen from the species abundance value which ranges from 1,000-10,000 ind/L and environmental parameter values, namely temperature 28.66 ˚C, brightness 6.26 m and DO 7.19 mg/l is optimal for the growth and development of phytoplankton while the salinity of 31.22 ˚/˳, pH 6.7 and BOD 2.7mg/l are below the standard quality of the Asahan River for marine biota according to the Decree of the Minister of Environment and Forestry No. 51 of 2004.
Analysis Of The Density Of Coliform Bacteria As An Indicator Of Pollutant In The River Aek Katia Labuhan Batu District Rosenta Purba, Ika; Harahap, Arman; Dieudonne, Bitondo
International Journal of Science and Environment (IJSE) Vol. 2 No. 1 (2022): February 2022
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (145.589 KB) | DOI: 10.51601/ijse.v2i1.8

Abstract

Coliform bacteria is a one of a kind negative bacteria commonly found in the river aek katia in kabupaten labuhanbatu, the presence of coliform bacteria can be an indicator of biology that is important to know the environmental conditions. This study aims to determine the environmental conditions based on biological indicators in the form of an abundance of coliform bacteria in the river Aek Katia Kabupaten Labuhanbatu. The main ingredient in this study is the river water and sediment. The results obtained are still below the quality standard so that the river aek katia in good condition biologically. The presence of coliform bacteria in the river can affect human and biota. So it needs to be considered in the efforts of the management of the environment of the community , especially in an effort to maintain the sustainability of fisheries resources.
Plankton Diversity In The Labuhanbatu Bilar River Rosenta Purba, Ika; Harahap, Arman
International Journal of Science and Environment (IJSE) Vol. 2 No. 2 (2022): May 2022
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v2i2.27

Abstract

The purpose of this study was to determine the plankton diversity index in the Labuhanbatu Bilah River. The research was carried out from January to March 2023 using the Purposive Random Sampling method which consisted of 3 observation stations, namely station 1. There were many community activities such as Domestic Waste, Sand Mining, Agriculture, Station 2. There was Domestic Waste, Cage Fish Farming and Agriculture. and Station 3. There are community activities such as bathing, domestic and agricultural waste. The results of the study found that the plankton composition in the Bilah Labuhanbatu River consisted of 3 classes of phytoplankton, namely Bacillariophyceae, Chlorophyceae and Cyanophyceae while the class of zooplankton consisted of 4 classes, namely Mastigophora, Monogononta, Crustacea and Ciliophora. The highest diversity index of phytoplankton was obtained at station 1 of the sand mining area with a value of 1.76 indicating that the level of diversity was included in the medium category. In zooplankton the highest diversity index was found at station 3 with a value of 0.42 which indicated that the level of diversity was included in the low category. Meanwhile, the highest dominance index for phytolactones was found at station 3 in a densely populated area with a value of 0.51, while for zooplankton it was found at station 1 in a sand mining area with a value of 0.00487, both values ​​indicating that no plankton genus dominates in the area. In zooplankton the highest diversity index was found at station 3 with a value of 0.42 which indicated that the level of diversity was included in the low category. Meanwhile, the highest dominance index for phytolactones was found at station 3 in a densely populated area with a value of 0.51, while for zooplankton it was found at station 1 in a sand mining area with a value of 0.00487, both values ​​indicating that no plankton genus dominates in the area. In zooplankton the highest diversity index was found at station 3 with a value of 0.42 which indicated that the level of diversity was included in the low category. Meanwhile, the highest dominance index for phytolactones was found at station 3 in a densely populated area with a value of 0.51, while for zooplankton it was found at station 1 in a sand mining area with a value of 0.00487, both values ​​indicating that no plankton genus dominates in the area.
Co-Authors Arie Santy Siahaan, Siska Aryanti Pada Soa, Christina Asriyati, Dewi Azhari Subakti, Dinda Damanik, Nellawani Dianti Siboro, Thiur Dieudonne, Bitondo Fatma Khuzaimah, Dewi Frans Grovy Naibaho Frihatini, Emi Hafni, Laila Harahap, Arman Hibatullah, Alnadia Yusriya Iman Hidayat Jamjan Meeboon, Jamjan Jendri Mamangkey Kartini Kramadibrata Lihardo Hulu, Irwan Mustika Piliang, Fenny Netti Sihaloho, Arvita PERAYANTI SINAGA, DIAN RAJAGUKGUK, SALOME Selvia Sitohang, Dini Sinaga, Fiana Sulindayani Suryati Napitupulu, Kristina Tridelpina Purba, Sumarny Wilson Sitopu, Joni Winda Afriza, Afni