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Bioscientist : Jurnal Ilmiah Biologi
Published by Universitas Pendidikan Mandalika
ISSN : 23385006     EISSN : 26544571     DOI : https://doi.org/10.33394
Core Subject : Science, Education, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Social Sciences
Bioscientist : Jurnal Ilmiah Biologi (BJIB), receiving and publishing article in the form of research (scientific article) in the field of biology education and utilization of biological research in learning. Moreover, this journal bridges the gap between research and practice, providing information, ideas and opinion, in addition to critical examinations of biology research and teaching. Through the coverage of policy and curriculum developments, the latest results of research into the teaching, learning and assessment of biology are brought to the fore. Special emphasize are as follow: 1. Research on Learning Biology (Biology Learning Materials at All Education Levels). 2. Pure Research of Biology Developed or Studied to the Sources, Materials, or Instructional Media Biology (Biology Learning Materials at All Education Levels and Application in Society). 3. Curriculum of Biology Education at all Education Levels. 4. Class Action Research (CAR) and Lesson Study in Biology. 5. Other Qualitative Research of Biology Education. 6. The School Management and Biology/Science Laboratory Management. 7. Biology Learning Evaluation. 8. Teacher Professional Issues/Trends in Biology Education. 9. Another Study for the Scope of Biology Education. 10. Research on Environmental Education.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 68 Documents
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Search results for , issue "Vol 10, No 2 (2022): December" : 68 Documents clear
Deskripsi Morfologi Penyakit pada Batang Buah Naga (Hylocereus sp.) dan Pengendaliannya Menggunakan Pestisida Nabati dari Serai Wangi (Cymbopogon nardus) Indah Oktaviani; Ayu Octavia Tanjung Putri; Mesita Dwi Pebina
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v10i2.6125

Abstract

Dragon fruit (Hylocereus sp.) is a plant introduced from America and started to be cultivated in several areas in Indonesia. The high consumer demand is one reason to increase dragon fruit production. However, during the growth period, dragon fruit plant stems are at high risk for disease. This study aims to describe the stem morphology of dragon fruit plants that are attacked by disease and to determine the effect of vegetable pesticides from Lemongrass Wangi (Cymbopogon nardus) in the cultivation area of the Lampung Province Agricultural Training Center (BPP). The research was divided into two stages, namely field observations using survey methods, and testing the application of vegetable pesticides on diseased plants. Observations made in the first stage included: stem morphological symptoms, disease attack frequency (FS), and disease attack intensity (IS). Observations on stem morphology showed that there were eight types of disease with different symptoms and causes, with an attack frequency of up to 100%. The highest percentage of disease attack intensity was caused by anthracnose (56.7%), and the lowest was brown rot (13.4%). Disease control trials using botanical pesticides were carried out on three diseases that attack almost all individual dragon fruit plants, namely: anthracnose, mosaic, and stem rot. The results showed a decrease in attack intensity on stem rot, mosaic, and anthracnose after four weeks of pesticide spraying.
Perkembangan Otak dan Fungsi Kognitif Anak: Peran Nutrisi dan Sistem Imun pada Awal Kehidupan Rahmi Novita Yusuf; Helmi Helmi
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v10i2.6289

Abstract

The human brain has about 86 billion neuron cells, which have the function of sending signals or impulses to and from the brain. The brain is a vital organ in human survival. The human brain begins to form in the middle of the first trimester of pregnancy. This type of research uses the literature review method sourced from published journals related to brain development and cognitive function of children; the role of nutrition and the immune system at the beginning of life. All journals and articles are obtained from: Pubmed, PMC, Google Cendikia with journal inclusion criteria that discuss the immune system ( microglia, pro-inflammatory cytokines IL-1β, α, IL-6, TNFα) cognitive function, child brain development ( Precursor neurotrophic factors (BDNF), nerve growth factors (NGF)), and nutrition ( Intestinal microbiota, modified cassava flour (MOCAF)) which are full texs. The result of this study is that the microbiota has a function in the process of absorbing nutrients, Both macronutrients and micronutrients needed by the fetal brain for the development of function. Mocaf consumption also plays a role in the absorption of calcium needed by the fetal brain for the process of neurogenesis, synaptogenesis. Gut microbiota imbalances have been shown to play a role in impaired brain development and cognitive function in ASD children. In addition to nutrition, the microglia system in the immune system also plays a big role as the main element of brain development and cognitive function. Microglia dysfunction in the central nervous system triggers proinflammatory cytokines through ROS so it is shown to have affected neurogenesis, synaptogenesis, cell mykgration, neuron cell life and triggered neurodegenerative diseases in subsequent offspring.
Analisis Indeks Keanekaragaman, Keragaman, dan Dominansi Ikan di Sungai Aur Lemau Kabupaten Bengkulu Tengah Intan Febrian; Euis Nursaadah; Bhakti Karyadi
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v10i2.5056

Abstract

Fish is one of the biological natural resources that has high diversity in river ecosystems. The purpose of this study was to determine the diversity index, diversity index, and fish dominance index in the Aur Lemau Watershed, which is located in Pondok Kelapa District, Central Bengkulu Regency. This type of research is descriptive quantitative. This research was conducted in January-August 2021. The sampling method used was purposive random sampling. Determination of the sampling location is recommended in the relatively different environmental conditions and fishing areas that are usually carried out by the surrounding community. This study found as many as 14 species of fish with a total number of 146 fish. The order that dominates the fish in the waters of the Aur Lemau River is the order Perciformes with a total of 8 families and 8 species. Based on the results of the calculation of the diversity index value of station I is 2.09; station II of 1.9; and station III of 1.3. Then, the uniformity index value of station I (0.96); station II (0.92); and station III (0.81). The highest dominance index is at station III with a value of 0.31. The dominance index value of station I is 0.14 and station II is 0.12.
Identification of Potential Isolate Phosphate Solubilizing Bacteria Used 16S rRNA Gene Albert Sembiring; Natalia Lusianingsih Sumanto
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v10i2.6218

Abstract

Plants always interact with microorganisms either negatively or positively during their life cycle. The Phosphate Solubilizing Bacteria (PSB) group is one example that has some beneficial effects on the plant. PSB can transform insoluble soil inorganic phosphates into soluble phosphorous so plants can absorb them. This research aimed to test the isolate's ability to solubilize phosphorous and use the 16S rRNA marker gene to identify it. Testing the ability of bacteria to solubilize phosphorous on Pikovskaya's agar medium used a qualitative method by observing the halo zone in the colony around it. Then the bacterial isolate was identified by analyzing the result of sequencing the 16S rRNA gene. The RZ02 bacterial isolate showed the highest performance in solubilizing phosphorous, with a 9.1 mm solubilization index. The gene of 16S rRNA was carried out by using primers 27F and 1492R with an amplicon size of 1500 base pairs. Sequencing analysis and construction of a phylogeny tree were conducted by the Mega X neighbor-joining method and showed 100% similarity with Pseudomonas aeruginosa OIS 481. The solubilization index indicated that the bacteria had a potential candidate to be one of the inoculant components for biofertilizer.
Efek Penambahan Cuka Aren (Arenga pinnata) pada Ikan Tongkol (Euthynnus affinis) terhadap Jumlah Mikroba dan Waktu Awal Pembusukan Rastina Rastina; Elvi Gustina Siregar; Filna Muharani; Fakhrurrazi Fakhrurrazi; Ismail Ismail; Darniati Darniati; Herrialfian Herrialfian; Siti Rani Ayuti; Ali Makmur
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v10i2.6056

Abstract

Tuna meat is a food ingredient with a high nutrient content, especially protein. This causes tuna meat cannot be stored for a long time, because it is easily damaged. To overcome this, you can add natural preservatives using palm vinegar (Arenga pinnata). This study aims to analyze the number of microbes and detect the initial time of decay in tuna (Euthynnus affinis) added with palm vinegar (Arenga pinnata). The research design used a completely randomized design (CRD), which consisted of 3 treatments and 3 repetitions. These 3 treatments were carried out by soaking 225 grams of tuna with palm vinegar at concentrations of 0%, 2.5% and 5% with 0 time. , 3, 6, and 9 hours. Determination of the number of microbes in this study was carried out using the Total Plate Count (TPC) method. The results showed that there was microbial contamination in tuna, and the higher the concentration of palm vinegar, the smaller the chance of microbial contamination. In the spoilage test with 6 hours of immersion of tuna meat with a concentration of 0% and 2.5%, the initial decay occurred, and at a concentration of 5%, the initial spoilage did not occur. It can be concluded that the use of palm vinegar with a concentration of 2.5% can reduce the amount of microbial contamination. Palm vinegar with a concentration of 5% can inhibit spoilage, and slow down the initial time of decay in tuna.
Validitas Perangkat Pembelajaran Model Flipped Classroom dalam Meningkatkan Motivasi dan Hasil Belajar Kognitif Siswa SMA Jodion Siburian; Anggun Br Sihotang; Ali Sadikin
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v10i2.6287

Abstract

Learning devices play an important role in directing the implementation and learning process. Before being used, all learning tools must be properly prepared according to the needs of the implementation of the learning model. The implementation of the flipped classroom learning model is one of the expected learning alternatives and motivates students to learn optimally and expects that student learning outcomes can also increase. Prior to implementation, it is necessary to develop better devices and conduct a feasibility analysis of the developed devices. The research was conducted at SMA N 1 Jambi City. This type of research is descriptive quantitative using data collection techniques in the form of closed questionnaires. The research aspects included syllabus validation, lesson plans, pretest and posttest question sheets, worksheets and student learning motivation questionnaires. Data analysis uses the percentage comparison between the score obtained and the maximum score. The results of the validator's assessment of the syllabus, lesson plans, worksheets, pretest and posttest questions, as well as the student learning motivation questionnaire were 82.25%; 83.25%; 80%; 86% and 86% in the "decent" category. The results of the test questions showed a validity value of 0.78 and a reliability of 0.88 which could mean that the instrument was declared fit for use. The results of the validation stated that all the flipped classroom model learning tools developed could be used in the learning process. The use of flipped classroom learning tools can increase student learning motivation in the experimental class from 73.60 to 91.36 while students' cognitive learning outcomes increase from 28.76 to 91.04.
Pengaruh Jenis Pelarut pada Ekstraksi Jahe Merah (Zingiber officinale var. rubrum) terhadap Aktivitas Bakteri Penyebab Penyakit pada Hewan Ternak In Vitro Abdul Zainal Muttaqin; Abun Abun; Endang Sujana
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v10i2.5823

Abstract

The use of antibiotics and commercial drugs for handling livestock can have dangerous side effects, so it is necessary to use natural alternative medicines. Red ginger is a potential plant used as traditional medicine. The content of metabolite compounds in red ginger consisting of groups: phenols, terpenoids, essential oils, and flavonoids are reported to be able to inhibit several pathogenic bacteria that cause disease in animals and humans. The purpose of this study was to determine the effect of different types of solvents in the extraction process of red ginger on the activity of disease-causing bacteria in livestock in vitro. Extraction was carried out by maceration method using several solvents consisting of: distilled water, 96% ethanol ethyl acetate, and n-hexane. Antibacterial activity test using agar diffusion method. The parameter tested is the diameter of the inhibition created around the disc paper. The results showed that red ginger extract using ethyl acetate, 96% ethanol, and n-hexane had a diameter of inhibition zone against Staphylococcus aureus bacteria of 3.38 mm; 3.17mm; and 3.70mm. In contrast to Escherichia coli bacteria, all solvents used for red ginger extraction were not found to have an inhibition zone against these bacteria.
Pengaruh Media Pembelajaran Jeopardy Game terhadap Aktivitas dan Hasil Belajar Peserta Didik Nuraini Nuraini; Misykat Malik Ibrahim; Jamilah Jamilah
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v10i2.4959

Abstract

The Jeopardy Game is a learning media designed to assess students' ability to identify and remember factual information. This study aimed to describe students' learning activities and outcomes, whether or not they used Jeopardy Game learning media. Another aim was to define the impact of the media on the activities and students' learning outcomes. This was a quasi-experimental study with a non-equivalent control group design. The data analysis techniques were descriptive statistical analysis and inferential statistics. The sample in this study was 20 students from class VIII A, selected as the experimental class, and class VIII C, as the control class. The instrument used is a learning outcome test on respiratory system material. The results showed that students taught using the Jeopardy Game learning media had an average learning outcome of 72.82 and learning activities of 70.85. Meanwhile, students taught using conventional learning models have an average learning outcome of 58.35 and a mean value of learning activities 45.6. The results of inferential statistical analysis obtained a significant value for activity and learning outcomes of 0.000. This value indicates that the sign < = 0.00 < 0.05 so that H0 is rejected and H1 is accepted. It appears that the Jeopardy Game learning media influenced students' activities and learning outcomes in PondokPesantren Al-Wahid PancaLautang's respiratory system material for class VIII Sidenreng Rappang District.
Plant Growth Promoting Rhizobacteria (PGPR) Akar Bambu, Kacang Hijau, dan Putri Malu untuk Meningkatkan Pertumbuhan Bintil Akar Kacang Hijau Astija Astija; Yulisa Yulisa; Lestari Alibasyah; Vita Indri Febriani
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v10i2.5291

Abstract

Plant Growth Promoting Rhizobacteria (PGPR) made from the roots of bamboo, mung bean, and putri embarrassment has not yet been applied to mung bean plants, specifically to determine its effect on the number, diameter, and quality of mung bean root nodules. Therefore, this study aims to explain the effect of PGPR fertilizer from the roots of bamboo, mung bean, and putri embarrassment on the number, diameter, and quality of nodules on mung bean (Vigna radiata L.) root nodules. The study was carried out by experiment, using a completely randomized design (CRD), which consisted of 4 treatments, namely: P0 (control) = without PGPR fertilizer; P1 = bamboo root PGPR fertilizer; P2 = green bean root PGPR fertilizer; and P3 = PGPR root shame daughter fertilizer. Each treatment was repeated 6 times. The data obtained was analyzed using the Analysis of Variance (ANOVA) which was processed using the XLSTAT 2020 program. The results showed that the PGPR fertilizer treatment from bamboo roots, mung bean roots, and embarrassed daughter roots was significantly different from the control or without PGPR. Among the three types of PGPR tested, it turned out that the PGPR from the roots of putri embarrassment had the most significant effect on the number of nodules (60.67); nodule diameter (1.91 mm); and absorbance (1.88). From these results, it is recommended that PGPR from the root of the embarrassed daughter be able to significantly increase the quantity and quality of mung bean root nodules.
Penerapan Model Pembelajaran Saintifik untuk Meningkatkan Pemahaman Konsep Ilmu Pengetahuan Alam Siswa Sekolah Menengah Pertama Yulianti Yulianti
Bioscientist : Jurnal Ilmiah Biologi Vol 10, No 2 (2022): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v10i2.6435

Abstract

The purpose of this study was to describe students' understanding of scientific concepts in science lessons which illustrate the teacher's ability to direct learning through a scientific learning model for class IX students of SMP Negeri 1 Taliwang. In the science learning process, teachers tend to use the lecture method when learning and are one-way only, as a result, student learning outcomes tend not to meet the Minimum Completeness Criteria. The type of this research is Classroom Action Research (CAR) which was adopted by Kemmis and Mc. Taggart has been implemented in two cycles. The research subjects were 31 Class IX students of SMP Negeri 1 Taliwang. This classroom action research was carried out in two cycles, each cycle consisting of planning, action, observation, and reflection stages. The results showed that the average ability of students' understanding of concepts was 76.58 in the first period (cycle 1) and the success rate increased to 81.87 in the second period (cycle II). Based on the results of the study, it can be concluded that the application of scientific learning to science lessons in Class IX can improve students' conceptual understanding of SMP Negeri 1 Taliwang.

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