Isolation, Characterization and Activity Test of Soil Origin Bacteria Amilage

This study aimed to obtain amylase-producing potent bacteria from soil and test the amylase activity produced. Soil samples were taken from the Biological Education and Research Forest, Andalas University. The isolation was done by using the stratified dilution technique on agar media. The screening of amylase activity employed the qualitative and quantitative tests on agar starch. From 8 isolated amylolytic bacteria, there were three isolates with amylolytic potential. The results of characterization and identification based on Bergey's Manual of Determinative Bacteriology show that isolates A4, A1, and A6 belonged to the genus Bacillus, Corynebacterium, and Klebsiella. The bacteria obtained can then be produced and optimized for the needs of industrial enzymes.

The Effect of GA3 and Salicylic Acid Combination on the Growth of Groundnut Sprout (Arachis Hypogaea L.) on Aluminum Stress

This study aimed to determine the influence of GA3 and salicylic acid on the germination and growth of Kelinci variety groundnut under aluminum stress. The research was conducted in the Botanical Laboratory of the Faculty of Mathematics and Natural Sciences, University of Lampung. This research was conducted in a 2x3 factorial experimental design. Factor A was AL (OH) 3 with two levels of concentration: 0% b/v and 5% b/v. Factor B was Growth Stimulant Substance (ZPT) with three levels of concentration: GA3 (0.1% w/v), salicylic acid (0.1% w/v), and GA3 and salicylic acid. The Tukey test determined the Main Effect, and the Simple Effect was determined with F-test at a significant level of 5%. It can be concluded that the mixture of GA3 solution and US solution was more effective than a single solution of GA3 or US.

The Relationship between Self Efficacy and Environmental Literacy in Pollution and Environmental Changes Learning Material

The purposes of this research were examining students' self-efficacy in pollution and environmental change learning; assessing the level of students' environmental literacy in pollution and environmental change learning, and analyzing the relationship between self-efficacy and environmental literacy in pollution and environmental change learning. The sample was determined using the purposive sampling technique. This research was a descriptive quantitative research with a single paradigm correlation design. The data collection techniques used were tests, questionnaires, and documentation. The results showed that students’ self-efficacy was in the strong category with an average score of 73; students’ environmental literacy was in the moderate category with an average score of 60. 2. The correlational value between self-efficacy and environmental literacy was 0.572 in the moderate category. The correlational value of the two variables was in a positive direction. Good self-efficacy tends to produce good environmental literacy.

Increasing Antioxidant Activity and Organoleptic Properties of Soursop Leaf Tea (Annona muricata Linn.) by Adding Cinnamon Powder (Cinnamomum burmanni)

Soursop leaf tea is a health drink that contains steroid compounds, terpenoids, flavonoids, kumari, tannins, and alkaloids. The flavonoids and tannins in soursop leaves act as antioxidants. Since it has an unpleasant aroma, cinnamon is added to add scent and flavor. This study aimed to determine the effect of cinnamon powder on the soursop leaf tea's antioxidant activity. This study employed the completely randomized design method (CRD) with two factors: the soursop leaves and cinnamon powder concentrations. This study consisted of four treatments, namely SP0 (100% soursop leaves), SP1 (90% soursop leaves and 10% cinnamon powder), SP2 (80% soursop leaves and 20% cinnamon powder), and SP3 (70% soursop leaves and 30% cinnamon powder) within three repetitions. The proximate test was focused on antioxidant activity analyzed by ANOVA at α = 5%. The organoleptic test covered the color, taste, aroma, and other overall preferences by qualitative descriptive tests. The results showed that the highest antioxidant (29.19%) could be found in the SP3 sample (70% soursop leaves and 30% cinnamon powder), while the preferred organoleptic test was the SP2 sample.

An Analysis of Biology Oral Communication Skills and Cognitive Learning Outcomes: The Impact of Practicum-Based Two-Stay Two-Stray Learning Model

Oral communication skills and cognitive learning outcomes are indicators of learning achievement. This research aimed to analyze students' oral communication skills and cognitive learning outcomes through the implementation of practicum-based TSTS. This research employed the quasi-experimental method with a pretest-posttest control group design. The samples were determined using the purposive sampling technique. The results showed that the practicum-based TSTS learning model contributed to students' oral communication skills with excellent categories. Teaching and learning activities using the practicum-based TSTS affected students' cognitive learning outcomes (Sig. 0.838 0.05). Thus, this research showed that the implementation of the practicum-based TSTS learning model on the Plantae topic can train students’ oral communication skills and affect their cognitive learning outcomes.

Environmentally Responsible Behavior and naturalist intelligence: Biology Learning to Support Sustainability

Biology learning needs to support sustainable development. This research was a quantitative-qualitative sequential explanatory mixed research. This research aimed to obtain information about the relationship between naturalist intelligence and environmental responsibility behavior. This research was conducted in February-August 2019. Quantitative research data were obtained by using a questionnaire with a Likert scale for the variables. Qualitative research data were obtained by doing interviews and observations. Quantitative data were analyzed using descriptive statistic calculation. The data hypothesis was tested by using a correlation test with the Product Moment Pearson formula. The result of this research showed that there was a positive relationship between naturalist intelligence and environmentally responsible behavior with regress equation Ŷ = 20.331 + 0,7524X. Correlation coefficient (r) = 0.66 and determination coefficient (r²) = 43.56% meant that the interpretation value was strong. r² value means that 43.56% environmentally responsible behavior correlates by naturalist intelligence and 56.44% environmentally responsible behavior is influenced by other factors. Biology learning must have a role to be able to provide innovations related to increasing students' knowledge about the environment. This study concludes that there is a correlation between the two variables.

Developing Islamic-Based Botanical Encyclopedia as a Learning Resource

Learning resources need to be developed based on current developments. The purpose of this research was to develop an Islamic-based Botanical Encyclopedia and test its quality. The method used to develop the encyclopedia was Research and Development (RD) with the 4D model (Design, Define, Develop, and Disseminate) proposed by Thiagarajan in 1974 as the development model. The research instrument had been validated by the material, media, and integration experts. The average percentage of the validation result was 88% (a very valid category). The small-scale trial obtained a percentage of 89% (very valid), and the large-scale trial obtained a percentage of 85% (very feasible category). The results indicated that the developed Islamic-based Botanical encyclopedia could be used as a resource for independent learning.

An Analysis of Critical Thinking Skills; Global Warming Learning Materials

This study aimed to analyze students' critical thinking skills levels on global warming materials. This quantitative descriptive study employed the cluster random sampling technique. The analyzed data were the students' critical thinking skills. Researchers collected the data using critical thinking skills test instruments in the form of description questions and open-ended questionnaires. Furthermore, the data were analyzed using statistical formulas in the form of percentages. Based on the data analysis results, the percentage of students' critical thinking skills score was 65% and was categorized at a moderate level. Therefore, the researchers concluded that students' critical thinking skills on global warming learning materials are moderate. Thus, there needs to be an effort to improve students' critical thinking skills.

The Validity of Integrated Islamic Ethnobotany Textbooks Based on the 3D PageFlip Application

Based on the analysis of needs, it is known that Ethnobotany learning in the Biology Tadris study program at IAIN Palangka Raya has not used integrated Islamic teaching materials, lecturers and students need integrated Islamic Ethnobotany textbooks that are valid for use in learning. This study aims to describe the validity of the integrated Islamic Ethnobotany textbook based on the 3D PageFlip. This research is part of development research with the ADDIE development model. This study uses a quantitative descriptive method for feasibility assessment based on the expert review (including two material expert validators, two media expert validators, and two interpreter expert validators) using a questionnaire. The results of the study indicate that the assessment of the material expert is 94.5% (very valid), the assessment of the media expert is 90% (very valid), and the assessment of the interpreter is 90% (very valid). Thus, textbooks can be declared very valid and suitable for use in learning.

Internalization of Religious Values Using the Argument-Driven Inquiry Model to Improve Critical Thinking Skills during the COVID-19 Pandemic

This research aimed to describe students’ activities, the improvement differences of students' critical thinking skills, and explain students' responses toward the internalization of religious values using the Argument-Driven Inquiry model on reproductive system material at eleventh-grade students of MAN 1 Kuningan. The method used in this research was the quantitative method with the experimental pretest-posttest control group design. This research population was all eleventh-grade students of MAN 1 Kuningan, which consisted of eight classes, five science classes, and three social studies classes. The research sample was taken using a random sampling technique. This research sample was class XI IPA 1 as the experimental class (35 students) and XI IPA 3 as the control class (34 students). The data collection techniques employed were observation, tests, and questionnaires. The data was analyzed using SPSS v.25 software. The results obtained showed that the highest learning activity was at the data collection stage. There was an improvement in students’ critical thinking skills in the experimental class and the control class. The average N-Gain of the experimental class was 0.69, and the control class was 0.33. The sig statistical test results were 0.000 0.655, meaning that H0 was rejected and Ha was accepted. Thus, there was a significant improvement in students' critical thinking skills between the experimental and control classes.