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Articles by Elly Roza
Total Records ( 4 ) for Elly Roza
  Salam N. Aritonang , Elly Roza and Sri Novalina
  This study aimed to evaluate the effect of adding “Tape Singkong” juice on the characteristic of fermented milk. In the study 4000 ml of milk was used and divided into 20 cups (200 ml/cup). A completely randomized design that consist of five treatments with four replications was used to analyze the data. The treatment are the giving tape singkong juice as much as 0% (A), 22.5% (B), 5% (C), 7.5% (D) and 10% (E) into the milk that contained 2% of Lactobacillus acidophilus. The variable was observed the characteristic of fermented milk that consist of the moisture, fat, lactose and alcohol content, acidity and bacteria colony count. The result of this research indicated that the addition of tape singkong juice up to 7.5% was significantly decreased the content of moisture, fat and lactose and increased acidity, alcohol content and bacteria colony count.
  Salam N. Aritonang and Elly Roza
  The research aims to determine the potency of fresh cassava leaves (Manihot esculenta crantz) as natural anthelmintic on the goat performances. Cassava leaves is an important cash crop widely grown in tropical area, contained high level of protein and could be used as a protein supplement and natural anthelmintic in ruminants. The research was conducted in experimental methods by using 20 six and seven months old PE female goat weighing 18-19 kg. Completely Randomized Design (CRD) was used with four treatments and five replications to analyze the data. The treatments were the length of fresh cassava leaves feeding as much as 8% from live weight for 0 week (A), 3 weeks (B), 6 weeks (C) and 9 weeks (D). The variable was observed the performances of goat that consisted of the faecal egg count, dry matter intake and average daily weight gain. The result of this research indicated that the feeding of fresh cassava leaves for a long time was significantly decreased the faecal egg count and increased the dry matter intake and average daily weight gain. It is concluded that cassava leaves can be used as natural anthelmintic in the ration and can be given in the long term because it is very significant to increase the goats performance and reduce the faecal egg count.
  Salam N. Aritonang , Elly Roza , Evy Rossi , Endang Purwati and Husmaini
  Background: Okara is an industrial waste product resulting from the manufacture of soy milk or tofu. This waste is a pulp consisting of the insoluble parts of the soybean that remain after pureed soybeans are filtered during the production of soy milk and tofu. Okara is not widely used and is dumped into the environment, causing pollution. However, this waste contains nutrients and may be a good medium for the growth and development of microorganisms such as Lactic Acid Bacteria (LAB). Objective: The purpose of this study was to isolate and identify probiotic LAB from okara and determine their antimicrobial activity against pathogenic bacteria (Escherichia coli 0157, Staphylococcus aureus ATCC 25923 and Listeria monocytogenes EP01). Methodology: Isolation and purification of LAB were carried out on MRS agar supplemented with 0.2% CaCO3. Isolates were identified by morphological and physiological tests. Antibacterial activity was tested using the well diffusion method and the obtained data were analyzed descriptively. Twenty-four isolates were grown on MRS agar. Results: Sixteen isolates that exhibited growth at the clear zone were identified as gram positive, catalase-negative homofermentative rod and coccus cells. The results showed that the LAB isolated from okara had the ability to inhibit pathogenic bacteria, causing various clear zone diameters. The survival rates of these isolates under acidic conditions and their tolerance to 0.5% bile salt were varied. Based on the antimicrobial activity and probiotic properties of the LAB isolated from okara, these isolates belong to the species Lactobacillus spentosus and Lactobacillus plantarum. Conclusion: The results showed that the LAB isolated from okara belonged to the species Lactobacillus pentosus and Lactobacillus plantarum. Both species exhibited properties attributed to probiotics.
  Arief , Elihasridas , Simel Somen , Elly Roza , Roni Pazla and Rizqan
  Objective: The aim of this research was to determine the influence of palm oil industry by-products (palm kernel cake and palm oil sludge) and Paitan (Tithonia diversifolia, TD) as roughage on the production and quality of Etawa crossbreed (EC) goat milk. Materials and Methods: Eighteen EC dairy goats on their second lactation month were used in this study. This study utilized a Completely Randomized Design (CRD) that consisted of 6 treatments and 3 replicates. The treatments were as follows: (A) 50% roughage+50% soybean meal waste (SMW)+0% palm oil concentrate (POC), (B) 50% TD+50% SMW+0% POC, (C) 50% TD+37.5% SMW+12.5% POC, (D) 50% TD+25% SMW+25% POC, (E) 50% TD+12.5% SMW+37.5% POC and (F) 50% TD+0% SMW+50% POC. The variables observed in this study were the production and quality of Etawa crossbreed milk (protein and lactose). Results: Results showed a milk production rate (1.44-1.85 kg/head/day) with a milk protein concentration (3.48-3.76%) and a lactose concentration (4.01- 4.16%). Using palm oil industry by-products and TD as an early feed can significantly increase milk production (p<0.01), but there was no effect on milk quality (p<0.05). Conclusion: The TD and palm oil industry by-products can be used as an alternative feed for animals. The optimal feed for dairy goats was 50% TD+25% SMW+25% POS (treatment D).
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