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Journal of Natural Sciences and Learning
Published by Universitas Wijaya Kusuma Surabaya
ISSN : 29631041     EISSN : 29629837     DOI : https://doi.org/10.30742/jnsl.v3i1
Core Subject : Science, Education, Social,
Biochemistry, Genetics & Molecular Biology Education Environmental Science Immunology & microbiology
Journal of Natural Sciences and Learning is published by the Department of Biology Education Faculty of Teacher Training and Education Universitas Wijaya Kusuma Surabaya. The Journal of Natural Sciences and Learning covers many academic disciplines, publishing articles for researchers, and educators and providing a forum for the sharing, dissemination and discussion of research, experience and perspectives across a wide range of natural science and learning. Criteria for publication in the Journal of Natural Sciences and Learning are novelty, quality, and general interest in experimental and theoretical basic natural sciences and biology/science education and learning. In detail, the scopes of this journal are research in: Life Sciences and Biology; Natural Science; Environmental Science; Biomaterial and Bioinformatic; Curriculum, Teaching and Learning; Biology Education; Learning Media; Learning/Teaching Methodologies; Educational Projects and Innovations; Science Educational Technology; Lesson Study in Biology/Natural Science Learning.
Arjuna Subject : Ilmu Sosial - Pendidikan
Articles 34 Documents
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Analysis of Criteria for School Exam Questions in Science Subjects at SMP Negeri 2 Ngoro Sulistyowati, Sulistyowati
Journal of Natural Sciences and Learning Vol. 4 No. 1 (2025): Journal of Natural Science and Learning
Publisher : Department of Biology Education, Faculty of Teacher Training and Education, Universitas Wijaya Kusuma Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30742/261yp359/jnsl.v4i1.413

Abstract

Quality test questions are questions that can provide precise information about student learning outcomes. The purpose of this study was to analyze the quality of the Science Subject School Exam questions at SMPN 2 Ngoro for the 2022/2023 academic year which consisted of 20 questions. The research sample consisted of 62 student responses in class IXA and IXF with purposive sampling method. This study uses a quantitative and qualitative approach with data analysis techniques using the SPSS version 25 application and Microsoft excel. The results showed that the items used were classified as difficult 15%, items classified as moderate 60% and items classified as easy 25%. The analysis of the discriminatory power of the questions showed that 70% of the items already had good discriminating power and the other 30% did not have good discriminating power and needed to be revised. The analysis of the distractor options from the items found that 96% of the total distracting options on these items were good and the rest were not good and needed to be revised.
FORMULATION OF SEREH (Cymbopogon Nardus) AND CITRIC ACID ON THE CHARACTERISTICS OF TELANG FLOWER DRINK (Clitoria Ternatea) AS A READY TO SERVE FUNCTIONAL DRINK Cahyaning Rini Utami; Putri, Annisa Rachmani
Journal of Natural Sciences and Learning Vol. 4 No. 1 (2025): Journal of Natural Science and Learning
Publisher : Department of Biology Education, Faculty of Teacher Training and Education, Universitas Wijaya Kusuma Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30742/8a9ec233/jnsl.v4i1.457

Abstract

This research explores the formulation of a ready-to-serve (RTS) beverage utilizing butterfly pea flower (Clitoria ternatea) combined with lemongrass (Cymbopogon nardus) and citric acid to enhance both sensory qualities and antioxidant properties. The study aims to identify the optimal concentrations of lemongrass and citric acid that yield the best sensory attributes and health benefits. A randomized complete block design was employed, featuring two factors: the first factor being the lemongrass concentration (15, 20, and 25 grams) and the second factor the citric acid concentration (0.2, 0.4, and 0.6 grams), resulting in a total of 27 experimental combinations. The researchers utilized two-way ANOVA to analyze the chemical data, followed by Tukey's test to identify significant differences among treatments. Additionally, sensory evaluations were conducted using Friedman's method. The optimal formulation, identified as S3F3, exhibited an antioxidant activity of 5.80 ppm, a pH of 3.5, a color a* value of 3.5, and a color rating of 4.38 (liked). Furthermore, it received a taste score of 4.26 (liked) and an aroma score of 4.26 (liked). These findings indicate that the S3A3 formulation not only aligns with consumer preferences but also provides substantial health benefits, positioning it as a competitive option in the functional beverage market.
EXPLORATION OF PH MEASUREMENT WITH NATURAL AND CHEMICAL INDICATORS Nazwar, Akhsan Pradika
Journal of Natural Sciences and Learning Vol. 4 No. 1 (2025): Journal of Natural Science and Learning
Publisher : Department of Biology Education, Faculty of Teacher Training and Education, Universitas Wijaya Kusuma Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30742/77cdcq51/jnsl.v4i1.482

Abstract

    pH measurement is an important method in chemical analysis to determine the level of acidity or alkalinity of a solution. This research aims to explore pH measurement using natural and chemical indicators. The research method involves the process of preparing indicators, measuring the pH of acid- base solutions, and comparative analysis of the results. The natural indicators used come from plant extracts such as turmeric, beetroot, butterfly pea flower, hibiscus flower, orange, while the chemical indicators are litmus paper and pH indicators. Extraction of natural indicators is carried out by a simple method using water as a solvent. The measurement results show that natural indicators provide a clear color change response in a certain pH range, although their sensitivity is lower than chemical indicators. Chemical indicators provide more precise and consistent results, but require higher costs and have potential environmental impacts. This research highlights the potential of natural indicators as environmentally friendly alternatives in pH measurement, especially for educational and small-scale applications. Thus, natural indicators can be a more economical and sustainable solution. The results of this research contribute to the development of a pH measurement method that is easy, cheap and environmentally friendly The purpose of this study is to find out natural materials that can be used as a substitute for chemical indicators such as litmus paper. The results of the research we conducted show that chemical indicators are more accurate compared to natural indicators.   .
IDENTIFICATION AND TAXONOMIC ANALYSIS OF VARIOUS INSECTS IN THE WONOREJO MANGROVE TOURISM AREA IN SURABAYA Maulana, Fauzan
Journal of Natural Sciences and Learning Vol. 4 No. 1 (2025): Journal of Natural Science and Learning
Publisher : Department of Biology Education, Faculty of Teacher Training and Education, Universitas Wijaya Kusuma Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30742/872sjv89/jnsl.v4i1.483

Abstract

The Wonorejo Surabaya Mangrove Tourism Area, one of the largest mangrove ecosystems in East Java, significantly contributes to biodiversity, particularly insect communities. This study aims to identify and analyse the taxonomy of various insect species inhabiting the region. A three-week field study was conducted in December 2024 using the sweep net method. Taxonomic analysis employed Linnaeus’ classification, while species identification relied on identification keys and relevant literature. The study revealed 15 insect species, including Pantala flavescens, Acisoma panorpoides, Danaus chrypsippus, Junonia orithya, Balenois aurota, Appias olferna, Junonia coenia, Catopsilia pyranthe, Eurema blanda, Catopsilia pamona, Xylocopa latipes, Papilio demodocus, Junonia almana, Hypolimnas bolina, and Vespa affinis. These species span three orders (Odonata, Lepidoptera, Hymenoptera), six families (Libellulidae, Nymphalidae, Pieridae, Apidae, Papilionidae, Vespidae), and 12 genera  (Pantala, Acisoma, Danaus, Junonia, Balenois, Appias, Catopsilia, Eurema, Xylocopa, Papilio, Hypolimnas, Vespa). This study highlights exceptional biodiversity and significant genetic potential for mangrove habitat conservation. These findings are crucial for regional management and conservation, including habitat protection and environmental education. Further research is necessary to understand insect ecological roles and develop effective conservation strategies for maintaining the health of Wonorejo’s mangrove ecosystem.

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