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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 1,428 Documents
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Karakteristik dan Efektivitas Formula Sabun Cuci Tangan Cair Handmade dalam Menurunkan Angka Kuman Sriwulan Sriwulan; Susanti Dhini Anggraini; Nia Nurfitria; Kuntum Febriyantiningrum
Bioscientist : Jurnal Ilmiah Biologi Vol 11, No 1 (2023): June
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.v11i1.7711

Abstract

This study aims to compare the characteristics of the handmade liquid hand soap formula and its effectiveness in reducing the number of germs. The formulation used is the difference in the amount of EDTA, Texapon, and NaCl used in soap making. The characterization carried out was organoleptic, physical stability at room temperature, pH, viscosity, foam height and stability, water holding capacity, and density. Meanwhile, reduced number of germs was carried out by calculating the total plate number (ALT) of bacteria on the test taker hand before and after washing their hands. The results obtained were that the first formula (P1) which used less amounts of EDTA, Texapon, and NaCl had a bright color, lack of foam, perfect solubility,stable at room temperature, and did not cause a burning feeling in the hands. Whereas the second formulation (P2) with a higher amount of EDTA, Texapon, and NaCl hadexellence in the amoont of foam compared to the previous formula but the solubility was not perfect, less stable at room temperature and caused a burning feeling in the hands. The result of Pairef t test show that the t count is bigger than t table, so the different formulation had an effect on reducing the germ on the test taker hand based on ALT germ number parameter. P1 formulation can reduce the number of bacteria on hands by 47.64% and P2 formulation by 36.12%.
Isolasi Bakteri Endofit Balakacida (Chromolaena odorata) Asal Banda Aceh dan Uji Aktivitas Antimikroba terhadap Bakteri Patogen Pasteurella multocida dan Bacillus subtilis Wahyu Eka Sari; Darmawi Darmawi; Rumi Sahara Zamzami; Henni Vanda; Nurliana Nurliana; Etriwati Etriwati; Luthfia Amanda
Bioscientist : Jurnal Ilmiah Biologi Vol 11, No 1 (2023): June
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.v11i1.8041

Abstract

Endophytic bacteria are bacteria that live in plant tissue without causing negative effects. Endophytic bacteria can produce bioactive compounds that can be used as antibacterial, anti-fungal, antiviral, anti-cancer, anti-diabetic, antimalarial and anti-immunosuppressive properties. Endophytic bacteria are found in all higher plants, one of which is balakacida (Chromolaena odorata). This study aims to isolate the endophytic bacteria balakacida plant from Banda Aceh, to test the antimicrobial activity against the pathogenic bacteria Pasteurella multocida and Bacillus subtilis. The samples used were young leaves of balakacida plant with the method of isolation and purification of endophytic bacteria and in vitro tests.The results showed that endophytic bacteria could be isolated from balakacida plant and showed inhibitory activity against the pathogenic bacteria Pasteurella multocida and Bacillus subtilis. Thus, the endophytic bacteria from balakacida have bioactive compounds that have potential as antimicrobials.
Pengembangan Lembar Kerja Peserta Didik Berbasis Pendekatan Inkuiri Terbimbing melalui Materi Pewarisan Sifat pada Makhluk Hidup Kelas IX SMP/MTs Widya Anggraeny; Renny Risdawati; Annika Maizeli
Bioscientist : Jurnal Ilmiah Biologi Vol 11, No 1 (2023): June
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.v11i1.7538

Abstract

The background to the development of guided inquiry-based LKPD is the incompatibility of the LKPD used with the proper LKPD criteria. This study aims to determine the feasibility of guided inquiry-based worksheets seen from the aspects of feasibility of content, language, didactics, and graphics by validators/educators, and to know the practicality of guided inquiry-based worksheets by educators and students. This research is a development research using a modelFour-D (4-D) The research instruments used were: (1) LKPD validity test questionnaire by validators and study field teachers, (2) practicality test questionnaire by educators and students. The results of the LKPD validation research by lecturers and educators obtained a percentage of 91.8% with very valid criteria. The practicality test results by educators obtained a percentage of 84.3% with very practical criteria. Student Worksheet Practicality Test Results obtained a percentage of 86.1% with very practical criteria.
Penerapan Model Pembelajaran Kooperatif Tipe Jigsaw untuk Meningkatkan Hasil Belajar Siswa pada Materi Sistem Koordinasi Manusia Kelas XI Sidelvi Tamu Ina; Yohana Makaborang; Riwa Rambu Hada Enda
Bioscientist : Jurnal Ilmiah Biologi Vol 11, No 1 (2023): June
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.v11i1.7653

Abstract

This study aims to improve the learning outcomes of class XI students of SMA Negeri 1 Pahunga Lodu through the application of a jigsaw cooperative learning model assisted by learning videos. This type of research is classified as Classroom Action Research (PTK) which is carried out in two cycles, which consists of four stages, namely: 1) planning; 2) implementation; 3) observation; and 4) the reflection stage. The subjects of this study were 38 students in class XI at SMA Negeri 1 Pahunga Lodu for the academic year 2022/2023, consisting of 14 male students and 24 female students. The data obtained in this study were in the form of student learning outcomes taken from the application of the jigsaw type cooperative learning model assisted by learning videos. The instruments used are: 1) interviews; 2) test; and 3) run. The results of the research and data analysis in cycle I and cycle II revealed that there was an increase in the learning outcomes of class XI students at SMA Negeri 1 Pahunga Lodu for the 2022/2023 academic year. This is indicated by an increase in the proportion of student learning outcomes in biology lessons on human coordination system material. The research results obtained the proportion of student learning outcomes in cycle I was 73%, and cycle II was 92%. The conclusion of this study is that the application of the jigsaw cooperative learning model can improve the learning outcomes of class XI students of SMA Negeri 1 Pahunga Lodu.
Aktivitas Tabir Surya Ekstrak Biji Nyamplung (Chalophyllum inophyllum Linn) Yusran Khery; Aliefman Hakim; Joni Rokhmat; AA Sukarso
Bioscientist : Jurnal Ilmiah Biologi Vol 11, No 1 (2023): June
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.v11i1.7972

Abstract

This study aims to evaluate the sunscreen activity of nyamplung seed extract resulting from cold press extraction, soxletation with n-hexane solvent, and maceration with alcohol solvent. Apart from that, determining the minimum concentration of using nyamplung seed extract as a sunscreen ingredient. This study was conducted in vitro using UV spectrophotometry with the method developed by Sayre et al., (1979). The results showed that the alcohol extract of nyamplung seeds had the best sunscreen activity with an SPF of 42,499 at a concentration of 1,000 ppm in chloroform:alcohol (1:1) in the ultra protection category. Followed by n-hexane extract and cold pressed extract with SPF 39,951 and 36,349 respectively with the same concentration, solvent, and category. The higher the sample concentration, the lower the percentage of erythema and pigmentation, while the higher the SPF. The lowest concentrations of cold pressed extract, n-hexane, and nyamplung seed alcohol that meet the category of sunscreen with ultra protection were 600, 600, and 400 ppm, respectively.
Keanekaragaman Jenis Landak Laut Kelas Echinoidea di Pantai Kadahang Kabupaten Sumba Timur Susani Rambu Anahau; Anita Tamu Ina
Bioscientist : Jurnal Ilmiah Biologi Vol 11, No 1 (2023): June
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.v11i1.7477

Abstract

The purpose of this study was to determine the diversity of sea urchin species on the Kadahang Beach, East Sumba Regency. The sampling technique used is a purposive sampling and analyzed using a quantitative descriptive approach with the Shannon-Wiener diversity index formula. Sea urchin samples were calculated using the quadratic transect technique with a plot size of 1 x 1 meter placed perpendicular to the inside of 50 meters using a plot of 16 plots. The environmental factors measured were temperature, salinity, and acidity (pH). Measurements were carried out at two observation stations. The results showed that 8 species of sea urchin were divided into 4 orders, namely the orders Echinaceae, Diadematoida, Camarodonta, and Stomopnestes. The diversity index obtained is in the moderate category with a value of H` = 2.026.
Evaluasi Manajemen Pembelajaran Biologi Kelas X Eni Suyantri; Baiq Sri Handayani; Tri Ayu Lestari
Bioscientist : Jurnal Ilmiah Biologi Vol 11, No 1 (2023): June
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.v11i1.7965

Abstract

Biology learning management is very important in an effective and efficient biology teaching and learning process. With biology learning management, the teacher plans, organizes, leads, and evaluates learning materials. This study aims to identify the strengths and weaknesses in biology learning management for class X at SMA Negeri 3 Mataram and provide insights for further improvement and development. This type of research is descriptive evaluative research with a quantitative approach. Based on the evaluation results, it was found that the good category for each stage of biology learning management was 81% starting from the planning stage, 75% organizing, 80% leadership, and 83% evaluation. Some of the obstacles encountered by teachers in biology learning management at SMA Negeri 3 Mataram were that teachers had difficulty planning/determining methods and models to be used in the learning process, teachers were not assertive in directing students to form groups, and teachers were unable to maintain student focus due to the organization of learning resources right.
Uji Antibakteri Ekstrak Rimpang Koenih Rimbo (Curcuma sumatrana Miq.) Tumbuhan Endemik Sumatra Barat terhadap Bakteri Gram Positif Feskaharny Alamsjah; Anthoni Agustien; Tri Widia Ningsih Alam
Bioscientist : Jurnal Ilmiah Biologi Vol 11, No 1 (2023): June
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.v11i1.7697

Abstract

Koenih rimbo (Curcuma sumatrana Miq.) is a medicinal plant endemic to Sumatra from the Zingiberaceae family. Research on the antibacterial test of koenih rimbo rhizome extracts against Gram-positive bacteria has been conducted at the Basic Biology Laboratory, UPT. Basic and Central Laboratory, Chemical Laboratory of Natural Materials, UPT. Biological Resources, Andalas University,Padang. This study aims to determine the antibacterial activity of fresh extracts, infusions, and ethanol extracts and determine the largest inhibition zone of koenih rimbo rhizomes against several Gram-positive bacteria. The research used a survey method with a purposive sampling technique. The results showed that the fresh extract, infusa, and ethanol extract had antibacterial activity against Gram-positive bacteria (Staphylococcus aureus, S. epidermidis, Bacillus subtilis, and B. cereus. The most significant inhibition zone was obtained from the extract with ethanol solvent with a strong inhibition category.
Pengaruh POC Kombinasi Ampas Teh dan Sabut Kelapa terhadap Pertumbuhan Tanaman Cabai Rawit (Capsicum frutescens) Firdanatul Istiqomah; Suparti Suparti
Bioscientist : Jurnal Ilmiah Biologi Vol 11, No 1 (2023): June
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.v11i1.8250

Abstract

Cayenne pepper is one of the most popular horticultural crops, therefore fertilization can be used to increase the growth of chili plants. This research was conducted to determine the effect of the POC combination of tea dregs and coconut coir on the growth of cayenne pepper. The study was conducted using an experimental method using a completely randomized design (CRD) factorial pattern, namely POC concentration factor P0 (without giving POC), P1 (100 ml POC tea dregs and coconut coir + 900 ml water), P2 (200 POC tea dregs and coconut coir ml + 800 ml water), P3 (POC tea dregs and coconut coir 300 ml + 700 ml water) and time intervals H1 (3 days), H2 (6 days). Observational data were analyzed by ANOVA test with 5% confidence level. The parameters measured were plant height, number of leaves and wet weight. The best growth of cayenne pepper plants was in the P3H2 treatment (300 ml POC concentration + 700 ml water and 6 days interval) with an average plant height of 24.5 cm, 8 leaves and 14.5 g fresh weight.
Predasi Kumbang Penyelam Dewasa Cybister sp. (Coleoptera: Dytiscidae) terhadap Larva Nyamuk Aedes aegypti Fiktor Imanuel Boleu; Boyke Raymond Toisuta
Bioscientist : Jurnal Ilmiah Biologi Vol 11, No 1 (2023): June
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.v11i1.7231

Abstract

The use of biocontrol agents in controlling Aedes aegypti mosquitoes can be an alternative to avoid the adverse effects of dependence on chemical insecticides. Exploration of potential local insects as biocontrol agents is important in maintaining the balance of the ecosystem. This study aims to determine the predation rate of the adult diving beetle Cybister sp. against Ae. mosquito larvae. aegypti. This experimental research was carried out at the Integrated MIPA Laboratory, Halmahera University. A total of 1 predator and 30 late instar larvae of Ae. aegypti was placed in an aquarium (20 cm x 14 cm x 14 cm, 2 L capacity) containing 1 liter of water. Observation of predation of Cybister sp. adults against Ae. aegypti was carried out for 72 hours at intervals of 6 hours. This predation experiment was carried out with three replicates. Analysis of the predation rate of Ae. aegypti refers to a mathematical model. The statistical test used was correlation to see the speed of larval predation and analysis of variance. The results showed that the adult diving beetle Cybister sp. able to reduce the number of Ae. aegypti with a predation rate in 12 hour intervals of 0.755; 0.294; 0.188; and 0.132 per hour respectively. This predation showed an accurate and significant relationship (R2 = 0.8608; P <0.05). The conclusions of this study indicate that the adult diving beetle Cybister sp. able to reduce the number of Ae. aegypti with a predation rate in 12 hour intervals of 0.755; 0.294; 0.188; and 0.132 per hour respectively, and statistically the predation shows an accurate and significant relationship.

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