Pengaruh Suhu Penyimpanan Minuman Susu Fermentasi “Y” Terhadap Aktivitas Antibakteri Pada Kuman Salmonella Typhi

Panjaitan, Cindy Priskila (2018) Pengaruh Suhu Penyimpanan Minuman Susu Fermentasi “Y” Terhadap Aktivitas Antibakteri Pada Kuman Salmonella Typhi. S1 thesis, Universitas Kristen Indonesia.

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Official URL: repository.uki.ac.id

Abstract

Minuman susu fermentasi “Y” merupakan minuman yang difermentasi menggunakan Lactobacillus casei strain Shirota (LcS) sebagai starter. Penyimpanan merupakan salah satu faktor yang mempengaruhi kualitas dari susu fermentasi. Viabilitas dari bakteri asam laktat pada susu fermentasi dapat berubah karena suhu penyimpanan yang tinggi. Penelitian ini bertujuan untuk mempelajari pengaruh suhu penyimpanan pada minuman susu fermentasi “Y” terhadap daya hambat pada kuman Salmonella typhi. Suhu yang digunakan dalam penelitian, terdiri dari suhu 00C, suhu 40C, dan suhu ruang. Uji antibakteri dilakukan dengan menggunakan metode difusi sumuran. Terbukti bahwa suhu memiliki pengaruh sangat signifikan (p = 0,001) dalam menekan pertumbuhan Salmonella typhi. Suhu dingin (suhu 00C, suhu 40C) merupakan suhu yang paling ideal dan memiliki diameter zona hambat 13,8000 mm dan 13,7600 mm, sedangkan suhu ruang hanya memiliki diameter zona hambat 9,5450 mm. Kata kunci : susu fermentasi, Lactobacillus casei strain Shirota, suhu, antibakteri, Salmonella typhi Fermented milk “Y” products is a fermented drinks using Lactobacillus casei strain Shirota as a starter. Storage is one of the factor which influenced the quality of the fermented milk products. Viability of lactic acid bacteria in the fermented milk can change due to high storage temperatures. The research aimed to study the effect of fermented milk storage temperatures on the inhibitory ability against Salmonella typhi. Temperature used in this research are frozen, four degrees Celcius, and room temperature. The antibacteria activity determined using the well diffusion method. It has been proved that temperature has significant effect (p = 0,001) on suppressed Salmonella typhi’s growth. Cold temperature (frozen and four degrees Celcius) are the most ideal temperature with diameter of inhibiting zone 13,8000 mm and 13,7600 mm, while room temperature only formed 9,5459 mm. Keywords : fermented milk, Lactobacillus casei strain Shirota, temperature, antibacteria, Salmonella typhi

Item Type: Thesis (S1)
Contributors:
ContributionContributorsNIDN/NIDKEmail
Thesis advisorSunarti, Lucia SriUNSPECIFIEDUNSPECIFIED
Subjects: SCIENCE > Microbiology
SCIENCE > Microbiology > Bacteria
Divisions: FAKULTAS KEDOKTERAN > Pendidikan Dokter
Depositing User: Ms Sari Mentari Simanjuntak
Date Deposited: 23 Jan 2020 07:02
Last Modified: 23 Jan 2020 07:02
URI: http://repository.uki.ac.id/id/eprint/1164

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