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All Journal Media Kedokteran Hewan Alifmatika: Jurnal Pendidikan dan Pembelajaran Matematika
Bq. Malikah Hr
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Religion Education Mathematics Medicine & Pharmacology Physics Veterinary Other

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Resistance of Escherichia coli Isolated from Water Sources on West Lombok Farms to Antibiotics Ningtyas, Novarina Sulsia Ista'In; Alfiana Laili Dwi Agustin; Bq. Malikah Hr; Baiq Susdiana Fibrianti
Media Kedokteran Hewan Vol. 35 No. 1 (2024): Media Kedokteran Hewan
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/mkh.v35i1.2024.1-8

Abstract

Antibiotics are frequently used arbitrarily in livestock industry without regards for dosage or norms use. The administration of antibiotics to livestock can lead to a decline in their efficacy and contribute to the emergence of antibiotic resistance, hence posing challenges to the quality and safety of livestock products. Escherichia coli (E.coli) is recognized as a bacterial indicator pollution. This study aims to determine the resistance of E. coli to the antibiotic's penicillin G and tetracycline. The study used a survey method with cross-sectional study design in July, 2023 on farms located in West Lombok. Testing was carried out on 10 water samples taken from water sources on farms that showed 2 negative samples and 8 positive samples of E. coli on EMBA media, then continued with resistance tests using Penicillin G and Tetracycline antibiotics by measuring the inhibitory zone that formed. The results of this study showed that E.coli samples experienced resistance to Penicillin G as many as 8 samples and tetracycline as many as 6 samples. E.coli bacteria isolated from drinking water have experienced resistance to antibiotics Penicillin G by 100% and Tetracycline 75%.
Development of a multi-representation-based calculus e-module to improve students' mathematical literacy skills Bq. Malikah Hr; Sukandi Sukandi; Alpiana Hidayatulloh; Baiq Susdiana Fibrianti
Alifmatika (Jurnal pendidikan dan pembelajaran Matematika) Vol 8 No 1 (2026): Alifmatika - June
Publisher : Fakultas Tarbiyah Universitas Ibrahimy

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35316/alifmatika.2026.v8i1.61-81

Abstract

The study aims to develop a multi-representation-based calculus e-module and to examine its effectiveness in improving students’ mathematical literacy skills. The research method employed was research and development (R&D) using the DDD-E model. The effectiveness of the e-module was tested through a quasi-experimental design with a pretest-posttest control group design and analysed using ANCOVA based on students’ pretest and posttest scores. The subjects were 62 first-semester students of the Civil Engineering Department at Mandalika University of Education, consisting of 32 students in the experimental class and 30 students in the control class. The results indicated that the developed e-module was validated by subject-matter, learning, and design experts and was effective in improving students’ mathematical literacy skills. The ANCOVA results showed a significance value of p < 0.001, which is less than 0.05, indicating a significant difference between the class that received treatment using the multi-representation-based e-module and the control class. The average posttest score of the experimental class (70.19) was higher than that of the control class (55.77), indicating that the use of a multi-representation-based calculus e-module had a positive impact on students’ mathematical literacy skills. In addition, the effect size value was 0.868, which was categorised as a large effect size. This result indicates that the developed e-module had a strong effect on improving students’ mathematical literacy skills. These findings suggest that the multi-representation-based calculus e-module is effective in improving students’ mathematical literacy skills and is suitable for implementation in calculus learning, particularly in the civil engineering program.
Co-Authors Alfiana Laili Dwi Agustin Alpiana Hidayatulloh Baiq Susdiana Fibrianti Baiq Susdiana Fibrianti Ningtyas, Novarina Sulsia Ista'In Sukandi Sukandi