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All Journal Jurnal Biologi Tropis Evolusi: Journal of Mathematics and Natural Sciences
Baiq Naili Dewi Atika
Universitas Nahdlatul Wathan Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Immunology & microbiology Mathematics

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Activity Test of Ethanol Extract of Tamarind Leaves (Tamarindus indica L.) Against the Inhibitory Power of Escherichia coli Bacteria Khaerul Ihwan; Nurpiah; Dwi Kartika Risfianty; Pahmi Husain; Irna Il Sanuriza; Baiq Naili Dewi Atika; Irfan Jayadi
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i4.5696

Abstract

Tamarind leaves (Tamarindus indica L.) contain compounds including saponins, flavonoids, and tannins. The content of tannin compounds in tamarind leaf extract (Tamarindus indica L.) is known to be used as an antidiarrheal bioagent. This study aims to identify antibacterial activity against Escherichia coli bacteria based on the potential of tamarind leaves (Tamarindus indica L.) as an anti-diarrheal bioagent. The design of this research is an experimental laboratory with randomized group design. The samples in this study were divided into 2 control groups, namely negative control (sterile aquades), positive control (ampiciilin), and 3 treatment groups, namely old and young tamarind leaf extract groups with each concentration of 25%, 50%, 75% and 100% with the number of samples for each treatment group as much as 3. Test the effectiveness of antimicrobials using the solid dilution method. The effectiveness of antimicrobials is demonstrated by the large diameter of the inhibitor on Muller Hilton Agar media. The results showed that the inhibitory power of young tamarind leaf extract ranged from 13.8 mm to 14.9 mm, while the inhibitory power of old tamarind leaf extract ranged from 10.7 mm to 11.9 mm, so that the inhibitory power of young tamarind leaf ethanol extract was greater than the type of old tamarind leaf ethanol’s extract.
Response To Changes in Water Temperature Based on Operculum Movement in Nile Tilapia (Oreochromis niloticus) Ishmah Humaidatul Aminah Zaim Alyaminy; Irna Il Sanuriza; Dwi Kartika Risfianty; Irfan Jayadi; Khaerul Ihwan; Baiq Naili Dewi Atika; Irma Risvana Dewi; Ria Harmayani; Faridatus Syarifa
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i3.12710

Abstract

The objective of this study is to examine the physiological response of Oreochromis niloticus at different water temperatures using laboratory experimental methods (experimental research carried out under controlled conditions and allows for systematic and accurate measurements). The observation method uses descriptive analysis. Based on the results of the study, it can be concluded that when Oreochromis niloticus is in a water environment with low temperatures (140 C and 200C), the movement of the operculum will decrease. This is due to an increase in dissolved oxygen levels and cold-water temperatures will affect the metabolism of the fish body. Whereas when Oreochromis niloticus is in a water environment with high temperatures (320 C, and 380 C), operculum movement will increase. The increase in operculum movement is caused by a decrease in dissolved oxygen levels.
Co-Authors Ahmad Azwan Arman Saokani Dwi Kartika Risfianty Faridatus Syarifa Harmayani, Ria Helmi Hariyanti Hermaningsih Hermaningsih Hernawati Hernawati Husain, Pahmi Husnul Khotimah Irma Risvana Dewi Irna Il Sanuriza Ishmah Humaidatul Aminah Zaim Alyaminy jayadi, irfan Khaerul Ihwan Khaerul Ikhwan Khusnul Khotimah Lalu Ragil Qiansantang Mas’uniwati Mas’uniwati Nurdin Nurdin Nurpiah Samsuddin Samsuddin Sinare Sinare Siti Fajriah Siti Jannatul Mardiani Sri Muji Rahayu