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Acetic Acid Content in Salak Sidempuan Vinegar Dilla Wirmaningsih; Yusni Atifah; Helendra
Jurnal Serambi Biologi Vol. 8 No. 3 (2023): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

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Abstract

Acetic acid is the result of natural fermentation derived from processed fruits and vegetables. Sidempuan salak fruit (Salacca sumatrana) is a salak that has a very large water content and can be processed into processed vinegar, one of which is Sidempuan salak vinegar. This study was conducted through anaerobic fermentation using Saccharomhyces cerevisiae for seven days, then re-fermented aerobically using Acetobacter xylinum for nine days aimed at converting alcohol and producing acetic acid. To determine the level of acetic acid, it uses a quantitative test with an alkalimetric titration method using a 0.1 N NaOH solution and a 1% phenolphthalein indicator of three drops, then replicating three times to cause a pink color. Thus, the results were obtained from measuring acetic acid levels produced from the fermentation of Sidempuan salak vinegar of 4.8% and having a pH of 4. This result proves that acetic acid produced from the fermentation of Sidempuan salak vinegar has met the criteria for vinegar content that can be marketed and is suitable for public consumption.
Effect of Different Feeding on Uric Acid Levels in Mice (Mus musculus L.) Diana, Okta; atifah, Yusni; Helendra
Jurnal Serambi Biologi Vol. 8 No. 2 (2023): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/srmb.v8i2.212

Abstract

Aim Uric acid is an acid that is formed from purine metabolism in the body. If uric acid levels in the blood exceed normal limits it is called hyperuricemia. Diet plays an important role in increasing or decreasing uric acid levels. Consuming foods high in purines can also increase uric acid levels. The purpose of this study was to determine the effect of different feeds on uric acid levels in mice. Methods This research is an experimental research. The research method used was a completely randomized design (CRD) with 3 treatments and 7 replications for each group. Results There is a difference in the average uric acid levels of mice in the K, P1, and P2 treatment groups. In the K treatment group, the average uric acid level of mice was 3,2 mg/dl. In the P1 treatment group, the average uric acid level of mice was 7,3 mg/dl. In the P2 treatment group, the average uric acid level of mice was 4,2 mg/dl. Main conclusions Differences in mice uric acid levels are influenced by diet, and consumption of foods high in purines. The highest average uric acid levels in mice were in the P1 treatment group of 7,3 mg/dl.
Item Quality Analysis of Concept Understanding and Problem Solving in Environmental Change Materials Using ANATES Hermaya, Intan; Helendra; Vauzia; Arsih, Fitri
Jurnal Ilmiah Pendidikan Profesi Guru Vol. 7 No. 2 (2024): Agustus
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jippg.v7i2.84083

Abstract

Teachers need help to measure students' understanding and problem-solving abilities, so these abilities are not measured well. This research analyses the quality of understanding concepts and problem-solving from environmental change material using the ANATES tool. Quantitative descriptive methods were used in this research. The research tool consists of objective questions and essays tested on class XI high school students after being verified by experts. The data collection method uses a questionnaire. The data collection instrument uses a questionnaire sheet. Data analysis techniques use quantitative analysis. The findings of the analysis show that although several things need to be modified, most of the items have good validity. The reliability of the instrument is in the high and very high categories. Question difficulty index, which varies from easy to complex. The majority of questions fall into the outstanding category for differentiating power. Based on the results of this research, the questions are generally of high quality. They can assess students' conceptual knowledge and problem-solving abilities related to environmental change material.
PENGARUH MODEL PROBLEM BASED LEARNING (PBL) BERBANTUAN MINDMAPPING TERHADAP KEMAMPUAN BERPIKIR KRITIS PESERTA DIDIK PADA PEMBELAJARAN BIOLOGI SMA Wulandari, Dini Busfi; Helendra; Yogica, Relsas; Fajrina, Suci
Jurnal Biogenerasi Vol. 9 No. 2 (2024): Volume 9 Nomor 2 tahun 2024 periode (Juni 2024 - September 2024)
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/biogenerasi.v9i2.4257

Abstract

The purpose of this study is to see if there is an effect of the Problem Based Learning (PBL) model assisted by mindmapping on the critical thinking skills of students in high school biology learning. This research is quasi experiment with a two group pretest-posttest design. The population in this study were all E phase students of SMAN 1 Timpeh in the 2023/2024 school year which amounted to 124 people consisting of 4 classes. Furthermore, the determination of the sample to be used as an experimental class and control class using purposive sampling technique. Data collection techniques used in this study were tests. The test used in this study was a test of students' critical thinking skills through pretest and posttest. Data analysis activities consist of data processing and statistical analysis activities. The results showed that the Problem Based Learning (PBL) model assisted by mindmapping had a positive effect on the critical thinking skills of students in high school biology learning, where the results of hypothesis testing using the independent sample t-test showed that the significance (2-tailed) was 0.000 which means <0.05 and the average value of critical thinking skills based on pretest and posttest scores in the experimental class increased by 23.4%.
PENGARUH MODEL PROBLEM BASED LEARNING PADA PEMBELAJARAN BIOLOGI TERHADAP KEMAMPUAN LITERASI SAINS SISWASMA Aradia, Fani Fenty; Helendra; Fuadiyah, Sa'diatul; Anggiyani, Ria
Jurnal Biogenerasi Vol. 9 No. 2 (2024): Volume 9 Nomor 2 tahun 2024 periode (Juni 2024 - September 2024)
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/biogenerasi.v9i2.4258

Abstract

21st century education aims to improve students' scientific literacy skills. The results of the PISA study show that Indonesian students' scientific literacy is in the low category. The low level of student scientific literacy is caused by several factors in the education system, such as the curriculum, teachers and students themselves. This research aims to see the effect of the model Problem Based Learning (PBL) in Biology learning on students' scientific literacy abilities at SMAN 2 Pulau Punjung based on three aspects of scientific literacy, namely aspects of context, knowledge and competence. This research is experimental research with methods like an experiment. The research sample consisted of 70 students consisting of two classes taken using engineering purposive sampling. The instrument used is a scientific literacy test. The data analysis techniques used are divided into three, namely normality test, homogeneity test and hypothesis test. Based on the research results, it is known that the hypothesis test results obtained were 0.000 < 0.05. This shows that there is an influence of the PBL model on students' scientific literacy abilities in Biology learning at SMAN 2 Pulau Punjung. This can be seen in the average value of the scientific literacy abilities of students taught using the PBL model which is higher than the average scientific literacy abilities of students taught using the learning model. discovery learning
PENGARUH PENERAPAN PROBLEM BASED LEARNING (PBL) TERHADAP LITERASI LINGKUNGAN PADA PEMBELAJARAN BIOLOGI DI SMAN 7 TEBO Yusriana, Anggi; Helendra; Yogica, Relsas; Fajrina, Suci
Jurnal Biogenerasi Vol. 9 No. 2 (2024): Volume 9 Nomor 2 tahun 2024 periode (Juni 2024 - September 2024)
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/biogenerasi.v9i2.4259

Abstract

Penelitian ini bertujuan untuk mengetahui literasi lingkungan peserta didik dengan menerapkan model Problem Based Learning. Peserta didik memiliki pemahaman yang masih rendah mengenai literasi lingkungan dan penerapan model pembelajaran yang kurang efektif. Model pembelajaran yang diterapkan di SMAN 7 Tebo umumnya belum menerapkan model pembelajaran yang sesuai dengan Kurikulum Merdeka. Jenis penelitian yaitu eksperimen semu atau Quasy Experimental. Dalam penelitian digunanakan dua kelas yaitu kelas eksperimen dengan model Problem Based Learning dan kelas kontrol dengan model Discovery Learning. Penentuan sampel menggunakan Purposive Sampling. Teknik analisis data yaitu uji normalitas, uji homogenitas, dan uji hipotesis menggunakan bantuan SPSS 20. Berdasarkan penelitian diperoleh hasil peserta didik kelas eksperimen lebih tinggi dibandingkan kelas kontrol. Hasil uji hipotesis penelitian dilihat dari nilai signifikansi 2-tailed < 0,05 yaitu 0,00. Berdasarkan uji hipotesis terdapat pengaruh positif model pembelajaran Problem Based Learning terhadap literasi lingkungan fase E SMAN 7 Tebo.
PENGARUH PENGGUNAAN BOOKLET TERINTEGRASI NILAI PREVENTIF MATERI SISTEM EKSKRESI MANUSIA TERHADAP HASIL BELAJAR PESERTA DIDIK KELAS XI FASE F SMA Salma, Fitra; Hijrah Selaras, Ganda; Helendra; Olvia Rahmi, Fitri
Jurnal Biogenerasi Vol. 9 No. 2 (2024): Volume 9 Nomor 2 tahun 2024 periode (Juni 2024 - September 2024)
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/biogenerasi.v9i2.4279

Abstract

Adolescents' knowledge about maintaining a healthy excretory system is still low on average. One way to increase students' knowledge is to implement the use of learning resources that promote and prevent health problems of the excretory system in school learning. This research aims to determine the effect of using an integrated booklet on the preventive value of human excretory system material on student learning outcomes. This type of research is quasi-experimental research with a posttest only control design. The instrument used to measure student learning outcomes is in the form of multiple choice questions. The sample class was selected using a saturated sampling technique. Data analysis using the Man-Whitney test obtained a significance result of (0.000) < α value (0.05), so it can be concluded that the use of an integrated booklet with the preventive value of human excretory system material has a positive effect on student learning outcomes.
Literature Review: Pengembangan Lembar Kerja Peserta Didik (LKPD) Biologi Berbasis Problem Based Learning (PBL) Dari, Putri Wulan; Helendra; Zulyusri; Rahmatika, Helsa
Jurnal Biogenerasi Vol. 10 No. 1 (2024): Volume 10 Nomor 1, Agustus 2024 - Februari 2025
Publisher : Universitas Cokroaminoto Palopo

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Abstract

Implementation of the learning process is a way to achieve educational goals. Learning media can support the learning process and function as well as possible. Student Worksheets are one type of effective learning resource. Designing LKPD using the Prolem Based Learning (PBL) model integrated into it is one way to inspire students to be actively involved in biology learning. The LKPD produced with an emphasis on problem solving is a LKPD that can be used in learning. Through a study of various journal papers that are related to each other and published between 2016 and 2024, this research uses descriptive research in the form of a literature review. Referenced papers are published in Indonesian and English and can be found in a number of media databases, including Google Scholar and Science Direct. PBL integrated worksheet has an impact on the teaching and learning process, according to the findings of the article review, because it helps students become aware of the dangers of the environment around them. Considering that integrated problem based learning (PBL) LKPD can improve students' critical thinking, it can be said to be suitable for use in biology learning in the classroom.
Literature Review Pengembangan Lembar Kerja Peserta Didik (LKPD) Berbasis Discovery Learning -, Fuji Dwi Fahma; Helendra; Fadilah, Muhyiatul; Anggriyani, Ria
Jurnal Biogenerasi Vol. 10 No. 1 (2024): Volume 10 Nomor 1, Agustus 2024 - Februari 2025
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/biogenerasi.v10i1.4575

Abstract

This study aims to examine the development of Student Worksheets (LKPD) based on Discovery Learning through a literature review. LKPD based on Discovery Learning is one of the effective learning media to improve critical thinking skills, problem solving, and students' understanding of concepts independently. The method used in this study is a literature review by examining various reference sources related to the development of LKPD, the application of the Discovery Learning model, and its impact on student learning outcomes from the Google scholar database from 2017 to 2023. The results of the review show that the development of LKPD based on Discovery Learning has a positive influence on the learning process, by increasing active participation and deeper understanding of the material. In addition, analysis of various studies shows challenges in implementation, such as time constraints, teacher readiness, and curriculum adaptation. Therefore, training is needed for educators and adjustments to LKPD to make it easier to apply in various classroom conditions. This study is expected to be a reference for the development of LKPD that is more effective and innovative in supporting Discovery Learning-based learning in schools.
IDENTIFIKASI JIWA KEWIRAUSAHAAN PESERTA DIDIK SETELAH MENGIKUTI PROYEK MATA PELAJARAN BIOLOGI DI SMA NEGERI 1 GUGUAK Fitri, Rahmadhani; Kholila, Azhari; Arsih, Fitri; Helendra; Anggriyani, Ria
Jurnal Biogenerasi Vol. 10 No. 1 (2024): Volume 10 Nomor 1, Agustus 2024 - Februari 2025
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/biogenerasi.v10i1.4622

Abstract

Based on BPS data in 2022, the second highest unemployment rate in 2021-2022 was high school graduates. This is partly due to the lack of provision of survival skills/life skills for students to face challenges in the future. The Merdeka Curriculum is a curriculum that can provide life skills and develop students' character. One of the skills that is very much needed by high school students is the skill to create opportunities and turn those opportunities into something valuable. This is closely related to the entrepreneurial spirit and attitude. Project-based learning has a major influence in honing the entrepreneurial spirit of students. This study aims to determine the level of entrepreneurial spirit of students after participating in the biology subject project at SMA Negeri 1 Guguak.This type of research is quantitative descriptive research. The research instrument used is a questionnaire. The research instrument used has been validated by two lecturers from the Department of Biology, FMIPA UNP and was tested on 30 students outside the research sample. The sample in this study were students in grades XI and XII with a total of 231 students at SMA Negeri 1 Guguak in the 2024/2025 academic year. The questionnaire distributed was an entrepreneurial spirit questionnaire after participating in a biology subject project. The research data were analyzed using percentage analysis (%) of student answers. Based on the research conducted, the value of students' entrepreneurial spirit after participating in a biology subject project was 79.50% and was included in the good category. It can be concluded that after participating in a biology subject project, it can foster students' entrepreneurial spirit which is identified through 6 main indicators, namely self-confidence, task and result orientation, daring to take risks, leadership, originality, and future orientation.