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dc.contributor.advisorIlyas, Syafruddin
dc.contributor.advisorRusmarilin, Herla
dc.contributor.authorHasibuan, Rosmayani
dc.date.accessioned2021-08-04T04:44:11Z
dc.date.available2021-08-04T04:44:11Z
dc.date.issued2011
dc.identifier.urihttp://repositori.usu.ac.id/handle/123456789/39147
dc.description.abstractThe research of yoghurt preparation using the lactic acid bacteria Lactobacillus bulgaricus and Streptococcus thermophillus had conducted. This research aims to study the effectiveness of yoghurt to decrease the cholesterol concentration of mice. The research had been performed using design with two factors of treatment, i.e : optimum incubation, temperature ( 30; 35; 40⁰C ) and treatment application of yoghurt concentration ( 0.25; 0.5; 1% ). Analysis of the optimum total colony of lactic acid bacteria is based on Standard Plate Count. Identification of the the lactic acid bacteria was conducted with observation morphology characteristic and biochemical test. The morphology characteristic was conducted by Gram dying, while biochemical test was conducted by catalase test, carbohydrate fermentation, motility, nitrate reductation and temperature test. The results showed that the optimum temperature on preparation of yoghurt is 40⁰C and the total colony is 1.63 x 109 CFU/ml, while the the treatment application of yoghurt consentration 0.25%, 0.50%, and 1% toward mice indicated that the cholesterol concentration of mice was decreasing i.e : 18.43%, 22.18% and 35.75%. The application of 1% yoghurt concentration gave the best result significantly in 35.75%.en_US
dc.description.abstractPenelitian tentang pembuatan soyghurt dengan menggunakan bakteri asam laktat, Lactobacillus bulgaricus dan Streptococcus thermophillus. Penelitian ini bertujuan untuk mengetahui efektifitas soyghurt dalam menurunkan kadar kolesterol dalam darah mencit dengan jumlah bakteri asam laktat dan suhu inkubasi yang optimum. Perlakuan suhu inkubasi pada pembuatan soyghurt adalah 30⁰, 35⁰, dan 40⁰C. Analisa jumlah bakteri asam laktat berdasarkan Standar Plate Count. Identifikasi jenis bakteri dilakukan dengan pengamatan karakteristik morfologi dan uji biokimia. Karakteristik morfologi dilakukan dengan pewarnaan Gram, sedangkan uji biokimia dilakukan dengan uji katalase, fermentasi karbohidrat, motilitas, reduktase nitrat, dan uji ketahanan suhu. Hasil penelitian menunjukkan bahwa suhu yang optimal pada pembuatan soyghurt adalah 40⁰C dengan jumlah koloni sebesar 1,63 x 109 CFU/ml. Pemberian soyghurt dengan konsentrasi 0,25, 0,50 dan 1% kepada hewan uji (mencit) menunjukkan pengaruh yang berbeda terhadap penurunan kadar kolesterol dalam darah mencit, masing-masing 18,43, 22,18 dan 35,75%. Pemberian soyghurt dengan konsentrasi 1% menunjukkan penurunan kadar kolesterol yang paling significan yaitu 35,75%.en_US
dc.language.isoiden_US
dc.publisherUniversitas Sumatera Utaraen_US
dc.subjectSuhu inkubasien_US
dc.subjectBakteri asam laktaten_US
dc.subjectSoyghurten_US
dc.subjectKolesterolen_US
dc.titleEfektifitas Pemberian Soyghurt terhadap Penurunan Kadar Kolesterol dalam Darah Mencit (Mus musculus) dengan Jumlah Bakteri Asam Laktat dan Suhu Inkubasi yang Optimumen_US
dc.typeThesisen_US
dc.identifier.nimNIM097030009
dc.description.pages119 Halamanen_US
dc.description.typeTesis Magisteren_US


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