BIOEDUKASI: Jurnal Biologi dan Pembelajarannya

Morphometric Study and Sexual Dimorphism in White-Cheeked Turtles (Siebenrockiella crassicollis) in the Conservation Area of Bengkulu University

2025-01-17T16:34:38+07:00

White-cheeked turtle Siebenrockiella crassicollis, known as the “smiling turtle” is one of the endangered turtle species in the world. Conservation efforts are needed to protect this species from the threat of extinction. Conservation is a complex process and involves various disciplines. The location of this study was in the Turtle Learning Center (TLC) conservation area of Bengkulu University, to determine the morphometrics and sexual dimorphism of male and female S. crassicollis based on body size as a conservation effort. The study subjects were 10 S. crassicollis (5 males and 5 females). Several morphometric measurements that have been carried out include head width, carapace length, carapace width, carapace arch length, carapace arch width, carapace height, plastron length, plastron width, midline on all plastron scales (gular, humeral, pectoral, abdominal, femoral, and anal), tail length, tail thickness, and body weight. A t-test was conducted to ensure the morphometric characteristics of male and female S. crassicollis. The results of the analysis showed significant differences. Male S. crassicollis have a longer humeral scale diameter and a longer tail.

Development of a Biodiversity Conservation E-module Containing Local Excellence in East Nusa Tenggara to Empower Students' Digital Literacy

2025-01-18T21:09:14+07:00

Digital literacy is a 21st century skill that students must have. Digital literacy indicators (finding, using, selecting, evaluating sources, considering the source and effect of the message, and using data to produce original work) can be used as a digital literacy measurement tool. E-module development uses the Lee & Owen model with stages including (1) assessment/analyze (Need assessment and Front-end analysis), (2) design, (3) development, (4) implementation, and (5) evaluation as designed loaded with local excellence. This research is a research & development (R&D) study conducted on 50 Biology Education Students at Nusa Cendana University which aims to empower students' digital literacy through the development of e-modules containing local advantages of East Nusa Tenggara. The e-module developed has been validated as suitable for use by material experts, teaching materials experts and biology education practitioners. Data analysis was carried out using normality and homogeneity tests with significance values > 0.05 and ANCOVA tests with significance < 0.05. The e-module that has been developed has passed the N-gain test with a score of 0.62. The results of this research show that the use of e-modules has a significant effect in empowering digital literacy of biology education students.

Development of Scientific Collaborative Learning Model to Improve Scientific Creativity Skills in Science Learning

2025-01-18T20:23:05+07:00

The development of students' scientific creativity skills is of paramount importance in science education, as it fosters conceptual understanding and critical thinking skills that are pertinent to the challenges of the 21st century. The present study aims to develop a Scientific Collaborative Learning model to enhance students' scientific creativity skills regarding circulatory system material. This research utilizes Nieveen's development model, which encompasses a series of stages including preliminary study, design, limited test, revision, field test, and dissemination. The research subjects were grade VIII students from two schools in Jember Regency. The findings indicated that the SCL learning model exhibited a validity level of 94.05%, categorizing it as "Highly valid." The efficacy of the model in enhancing students' scientific creativity skills is evidenced by the N-gain value of 0.71 in the small class test, which falls within the medium category, 0.68 in the large class test, also falling within the medium category, and 0.68 in the dissemination class test, also falling within the medium category. The Scientific Collaborative Learning model has been validated and found to be effective in facilitating science learning, particularly in the context of the circulatory system.

Correlation Between Collaboration Skills & Environmental Literacy in Class XI Students at SMA Negeri 6 Malang

2025-01-18T20:58:57+07:00

The aim of this research is to analyze the level of student collaboration skills, namely indicators of productive work, showing respect, compromise and responsibility and to analyze the level of environmental literacy, namely indicators of environmental knowledge, cognitive skills, environmental care attitudes and environmental behavior in students at SMA Negeri 6 Malang and knowing the relationship between collaboration skills and students' environmental literacy. The sample in this research was 33 class XI students. This research is quantitative research using test data collection techniques, observations, interviews and documentation. The sampling technique used was purposive sampling. The data obtained will be tested using the Pearson Correlation statistical test. The research results show that the level of collaboration skills of students got a score of 201.65 which is in the medium category (Proficient) while environmental literacy got a score of 179 which is in the medium category. Collaboration skills can help improve students' environmental literacy, especially in working together and contributing to one another. Both variables show a positive relationship between collaboration skills and environmental literacy of class XI students at SMA Negeri 6 Malang, which means that the higher the collaboration skills carried out, the higher the students' environmental literacy will be.

Effectiveness Test of Potassium Sorbate and Sodium Benzoate Preservatives Against Eschericia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans and Aspergillus brasiliensis in Herbal Cough Medicine (OBH) Preparations

2025-01-19T14:23:31+07:00

Preservatives are food additives that are permitted for use to prevent or inhibit fermentation, acidification, decomposition, and other damage to food caused by microorganisms. Herbal cough medicines generally contain plant materials that are sensitive to microbiological hazards, so they are at greater risk of microbial contamination. The purpose of this study was to assess the effectiveness of Potassium sorbate and Sodium benzoate preservatives in inhibiting the growth of Eschericia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans and Aspergillus brasiliensis bacteria in herbal cough medicine preparations with menthol and strawberry variants. The preservative effectiveness test method refers to the Indonesian Pharmacopoeia Edition VI, carried out on days 0, 14 and 28. Based on the study, Potassium sorbate and Sodium benzoate effectively inhibit the growth of Eschericia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans and Aspergillus brasiliensis bacteria in OBH preparations with menthol and strawberry variants. In the group OBH menthol variant colonies of 5.5 Log Reduction from the initial count on day 14 and the number of colonies did not increase from the initial count until days 14 and 28. In the group OBH strawberry variant colonies by 5.6 Log Reduction from the initial count on day 14 and the number of colonies did not increase from the initial count until the 14th and 28th days.

Analysis of Instruments and Rubrics in Measuring Students' Communication Skills

2025-01-16T21:10:16+07:00

Education has transitioned into the knowledge era, presenting new challenges that highlight the importance of 21st-century skills. Emphasizing 21st-century skills prepares students to navigate a world demanding enhanced cognitive abilities and creativity, with a focus on soft skills over hard skills. Strong communication skills are crucial for effective teaching and learning, enabling students to articulate thoughts, listen actively, and collaborate in group settings. Structured evaluation tools and rubrics are vital for assessing these competencies, aiding teachers in evaluating students' oral communication abilities within the framework of 21st-century skills. The study uses qualitative methodology with literature review techniques, collecting data from Scopus and analyzing it in four stages. The analysis shows that various communication instruments and rubrics are used by educational institutions to enhance 21st-century skills. Between 2018-2023, five articles used communication skill instruments in their research, featuring at least four commonly used rubrics: Greenstein, CCSS, PISA, and UNT.

Development of Learning Media "Holoscience Application" Problem-Based Circulatory System Material Assisted by Hologram Pyramid to Improve Student Collaboration Skills

2025-01-18T20:48:55+07:00

The development of this media aims to design, validate, test practicality, and evaluate the effectiveness of the Holosains Application in enhancing collaborative skills in the Circulatory System topic. The research method used is R&D, with the development design following the Lee & Owens model. This model includes five stages: (1) analysis, (2) design, (3) development, (4) implementation, and (5) evaluation. The research site was SMPN 16 Malang in class 8B, with a total of 34 students. The media validation results showed a score of 93.8%, categorized as "Very Valid," while content validation reached a percentage of 100%, also deemed "Very Valid." Field validation obtained a 100% score, rated as "Very Valid." The practicality test scored 83%, which falls under the "Very Practical" category. The effectiveness test, derived from the N-gain calculation of pretest and posttest scores, achieved a score of 0.61, classified as "Moderate." Based on the testing results and collaborative skill assessments, the development of the Holosains Application is deemed valid, practical, and effective.

The Effect of Active Learning Method Type Everyone is a Teacher Here on the Formation of Students' Self-Concept at State Senior High School 20 Gowa

2025-02-01T13:13:31+07:00

This study aims to determine the effect of the Everyone Is A Teacher Here type of active learning method on the formation of students' self-concept at SMA Negeri 20 Gowa. The research method used is quantitative research with a type of quasi-experimental research (Quasy Experiment). The sample in this study amounted to 90 students and was divided into three groups. The treatment groups involved in this study were experimental class, positive control class and negative control class. The research design used was pretest-posttest nonequivalent control group design. Data collection uses non-test instruments. The non-test instrument is in the form of a self-concept questionnaire. The data analysis technique used is descriptive analysis and inferential analysis using prerequisite tests and hypothesis testing (Anacova test). Based on the results of the study using descriptive analysis, the average pretest value of the self-concept of students in the class taught with the active learning method of everyone is a teacher here type was 57.73 and the average posttest value was 84.23. Based on the results of inferential analysis (anacova test) using SPSS 27 For Windows, it can be obtained a sig value of 0.000 <0.05 so that it can be said that the hypothesis is proven where H1 is accepted, namely there is an effect of active learning methods of everyone is a teacher here type on the formation of self-concept of students at SMA Negeri 20 Gowa.

Vegetation Analysis of Sumatran Orangutan (Pongo abelii) Habitat in Mamas Resort Area, Gunung Leuser National Park, Southeast Aceh

2025-02-02T06:55:09+07:00

Most fauna species are highly dependent on forest quality, one of which is orangutans. Orangutans have a habitat preference that is evenly distributed or in groups. Therefore, the management of orangutan populations and their habitats must consider the habitat preferences of orangutan populations. The purpose of this study was to determine the habitat quality (vegetation types) of orangutan populations through vegetation richness in both habitat types, namely primary and secondary forests. The method used is plotted (20x20) line method. This study was conducted for 2 weeks (8-21 August 2023). Each habitat type consists of 4 transects, 40 plots in primary forests and 18 plots in secondary forests. The highest Importance Value Index (IVI) in primary forests is Litsea diversifolia from the Lauraceae Family, while in secondary forests, the hignest IVI is Macaranga gigantea from Euphorbiaceae family. The availability of sumatran orangutan food tree species, as many as 60 species in Primary forest and 45 species in secondary forest. The diversity index shows that primary forests have higher diversity than secondary forests. The species diversity index, dominance index, and evenness index in primary and secondary forests are categorized as high.

Development of Pterydophyte Herbarium Encyclopedia Integrated Augmented Reality to Improve Undergraduate Student’s Biodiversity Literacy

2025-02-02T06:58:52+07:00

This research is a research and development design utilized Lee & Owens model (2004) to produce a valid, practical, and feasible pterydophyta herbarium encyclopedia integrated augmented reality. The stages of this research and development consist of analysis which includes needs analysis and front-end analysis, design, development, implementation and evaluation. The data collection instruments included interviews, field observation, media and material validity expert questionnaire, student's readability questionnaire, and biodiversity literacy test. The subjects of the limited trial consisted of 28 undergraduate students in the Department of Biology, FMIPA, State University of Malang. The trial design uses a one group pretest posttest design. The Pterydophyte encyclopedia integrated augemented reality as learning resources categorized very feasible based on the result by media expert 100% categorized as very valid, material expert 85.1% categorized as valid, and student 91. 3% categorized as very feasible. Product effectivity is based on N-Gain score with value 0.58, it means that the score in class trial was effective. The paired sample t test shows that the significant value is 0.000. It shows that the significance value is less than 0.05, so there is a significant effect in improving undergraduate students's biodiversity literacy.

The Effect of Synthetic Pesticides and Botanical Pesticides From Paitan Leaves (Thitonia diversifolia) on Death, Behavior of Earthworms, Hatchability of Coccon and Histology of Earthworms

2025-01-31T21:49:12+07:00

The use of synthetic pesticides in pest control is increasing from year to year. The effects of using synthetic pesticides can affect non-target organisms that live in the soil, such as earthworms. Therefore, it is necessary to develop botanical pesticides based on paitan leaf extract (Thitonia diversifolia) which are environmentally friendly. The method of research used is laboratory experimental research with a Completely Randomized Design (CRD) research design. The aim of this research was to analyze the effect of exposure to synthetic pesticides and botanical pesticides from paitan leaf extract on the growth, behavior of earthworms, cocoon hatchability and histology. Making paitan leaf extract using the maceration method with ethanol solvent. The pesticide concentration in the study consisted of negative control (K-), synthetic pesticide (K+), and 5% paitan leaf extract. Based on the research results, it shows that earthworms exposed to synthetic pesticides died more (79 %) compared to treatment with paitan leaf extract (39 %), and K(-) 15%. The most cocoons that successfully hatched were found in the treatment K(-) Based on research results, botanical pesticides, paitan leaves are safe for the life of earthworms.

The Influence of Project-Based Learning Integrated with Science, Technology, Engineering, and Mathematics (PjBL-STEM) on Students' Critical Thinking Skills in Biology Education

2025-02-02T05:57:09+07:00

Project-Based Learning model integrated with Science, Technology, Engineering, and Mathematics (PjBL-STEM) is an innovative learning model that involves project work in which students independently construct their learning and accumulate it into tangible products. This study aims to measure the impact of the PjBL-STEM model on the critical thinking skills of 10th-grade students at MA Sumber Bungur Pakong, Pamekasan. The research method used is a quasi-experimental design with a Nonrandomized Control-Group Pretest-Posttest design. The research sample consisted of 47 students selected using random sampling techniques, divided into experimental and control groups. Data were collected through essay tests and questionnaires, and then analyzed using ANCOVA. The results indicate that the PjBL-STEM model has a significant effect on improving students' critical thinking skills. These findings suggest that PjBL-STEM is effective in developing critical thinking skills among students.

The Effect of Increasing Testosterone and LPS Injection to the Chick of Domestic (Gallus gallus domesticus) Immunity and Growth

2025-02-02T06:56:56+07:00

In avian species, mothers have the ability to mitigate future challenges for their offspring by investing more or varied substances into their eggs. The primary goal of this strategy is to enhance the survival chances of their descendants. Since egg development occurs independently outside the mother's body, we manipulated the egg's contents by increasing androgen hormones in the albumin region. In this study, we introduced testosterone (T) and sesame oil injections during the early stages of embryo development by injecting the albumin position and observed the effects. After hatching, both groups of chicks were injected with LPS derived from Escherichia coli to assess their immune response and biometric growth. We measured the effects of T injections on body temperature, body mass, and the development of vital internal organs. The results revealed that chicks from the T-injected group exhibited three key indicators of improved condition: (1) a stronger response to LPS injection, as shown by a higher increase in body temperature compared to the control group, (2) similar body mass growth during early development, and (3) enhanced development of vital organs related to immunity. These findings suggest that embryos were able to utilize the increased testosterone during development to boost their immune responses against potential infections.

Variation in Community Structure and Mollusk Diversity in Several Mangrove Ecosystems on the Northern Coast of East Java

2025-02-01T13:17:44+07:00

This study aims to analyze the variation in community structure and mollusk diversity in several mangrove ecosystems along the northern coast of East Java. Mollusk samples were collected from five different locations: Pasuruan, Probolinggo, Gresik, Tuban, and Banyuwangi, using purposive sampling with transect and plot sampling methods. The tools used included raffia string, transects, shovels, tape measures, writing instruments, thermometers, pH meters, and a Microsoft Excel 2010 working sheet. Physical and chemical water parameters such as salinity, pH, temperature, and water clarity were measured to identify environmental factors influencing mollusk distribution. The results showed that the Mangrove Center in Banyuwangi had the highest mollusk diversity, while the Mangrove Center in Tuban showed a lower and more uniform diversity. Principal Component Analysis (PCA) indicated that salinity, dissolved oxygen, and water temperature are major factors influencing mollusk community variation at the study locations. These findings provide insights into the importance of suitable environmental conditions to support mollusk diversity in mangrove ecosystems.

Test of Antibacterial Activity of Kicked Oranges (Citrus Hystrix) and Basil Leaves (Ocimum Basilicum L) Against Staphylococcus Epidermidis Bacteria in Spray Deodorant Preparations.

2025-02-04T14:34:44+07:00

This study tested the antibacterial activity of essential oils of kaffir lime peel (Citrus hystrix) and basil leaves (Ocimum basilicum L.) against Staphylococcus epidermidis bacteria in deodorant spray preparations. Essential oils were obtained through steam distillation, analyzed using GC-MS, and tested by the pitting diffusion method.The results showed that the combination of essential oils contained active compounds such as limonene and linalool, which effectively inhibited bacterial growth. The formula with 6% concentration showed the largest inhibition zone (24.74 mm) and was stable during storage. In conclusion, deodorant spray made from kaffir lime and basil essential oils has strong and stable antibacterial activity, so it has the potential to be developed as a natural product.