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All Journal JURNAL PENDIDIKAN TAMBUSAI MASALIQ: Jurnal Pendidikan dan Sains
Uthami, Feranis Nadia
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Religion Education Social Sciences

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Karakteristik Pola Pertumbuhan Bakteri Termofilik Isolat MS-12 dari Sumber Air Padas Mudiak Sapan Uthami, Feranis Nadia; Irdawati, Irdawati
MASALIQ Vol 4 No 1 (2024): JANUARI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v4i1.2621

Abstract

The growth pattern of thermophilic bacteria can be observed through turbidity testing, representing each growth phase: lag, exponential, stationary, and death phases. To evaluate and understand the growth pattern of thermophilic bacteria, particularly MS-12 isolate from the Mudiak Sapan (MS) hot springs, it can be analyzed through Optical Density (OD) testing using a UV-Vis spectrophotometer (600 nm). The OD test is commonly employed to determine the turbidity level in a solution by measuring the light passing through the solution, proportional to the number of cells or particles within it. The testing method used in this study is descriptive with two replications. The research was conducted at the Microbiology Laboratory, Faculty of Mathematics and Natural Sciences, Padang State University on December 9, 2023. Bacteria were incubated for 12 hours at a temperature of 50ºC, and their growth was measured using a UV-Vis spectrophotometer with a wavelength of 600 nm. Turbidity measurements were taken every 2 hours during the 12-hour incubation period. The growth pattern of MS-12 bacterial isolate, as observed from the measurements, can be considered favorable. At the 2-hour measurement in the second hour, bacterial growth averaged at 0.1535 (lag phase). Measurements from the 3rd to the 8th hour reached an average of 0.8105 (exponential phase). The 9th and 10th hours exhibited a stationary phase, while the measurements in the last 2 hours indicated a death phase, signifying a decline in the bacterial growth pattern.
Analisis Karakteristik Pola Pertumbuhan Bakteri Termofilik Isolat MS-17 dari Sumber Air Panas Mudiak Sapan Uthami, Feranis Nadia; Irdawati, Irdawati
Jurnal Pendidikan Tambusai Vol. 8 No. 2 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v8i2.14777

Abstract

Bakteri termofilik memiliki keunikan dalam kemampuannya bertahan dan berkembang pada suhu tinggi, didukung oleh enzim termostabil. Pengujian ini menjadi parameter kunci dalam menganalisis karakteristik pertumbuhan mikroorganisme. Dan untuk menganalisis pola pertumbuhan isolat bakteri MS-17 dengan metode deskriptif dengan dua ulangan. Hasil penelitian dengan melihat pengukuran yang dilakukan 2 jam sekali selama 24 jam menunjukkan tiga fase utama dalam pertumbuhan bakteri MS-17. Tiga fase tersebut adalah fase lag, menandai adaptasi awal bakteri terhadap lingkungan, diikuti oleh fase eksponensial (log) yang menandakan pertumbuhan signifikan karena kondisi lingkungan mendukung. Fase stasioner menunjukkan pertumbuhan bakteri mencapai titik stagnasi karena penipisan nutrisi dalam medium tumbuh. Analisis pola pertumbuhan ini berada pada pertumbuhan yang signifikan pada fase stasioner, dengan rata-rata nilai ABS optical density mencapai 0,8245. Pemahaman lebih lanjut tentang karakteristik pertumbuhan bakteri termofilik ini dapat menjadi landasan untuk penelitian lebih lanjut dalam bidang ini.
Co-Authors Irdawati Irdawati