The research was aimed to evaluate the effect of different fedding frequencies to the quality of growth is protein efficiency ratio, meat protein mass and meat calcium mass of crossbred native chicken (male native chicken x female laying hen). The material used was 120 unsexed birds with average body weight 97,49 ± 5,40 g (CV = 12,4%), were kept until 7 weeks. The experiment was designed as completely randomized design with 4 treatments and 5 replications. There were 6 birds each per experiment. Treatments applied were T1 (feeding a time a day, at 06.00 am), T2 feeding two times a day, at 06.00 am and 06.00 pm), T3 (feeding three times a day, at 06.00 am, 12.00 am and 06.00 pm), T4 (feeding four times a day, at 06.00 am, 12.00 am, 06.00 pm and 12.00 pm). Parameters measured were protein efficiency ratio, meat protein mass and meat calcium mass. Data were analyzed according to analysis of variance (ANOVA) determine the effect of treatment. Different feeding frequencies were not significant (P>0,05) on protein efficiency ratio, meat rotein mass and meat calcium mass. Conclusion of this research explain different feeding frequencies against crossbred native chicken, didn’t change the rate of protein efficiency ratio, meat protein mass and meat calcium mass.

ABSTRAKPemberian pakan buatan bertujuan untuk menyediakan makanan dalam jumlah cukup, tepat waktu, dan bernilai gizi tinggi serta berkesinambungan. Salah satu indikator budidaya yang baik adalah Feed Convertion Ratio pakan dan Survival Rate ikan. Feed Convertion Ratio pakan ikan sangat tergantung dari bahan baku yang digunakan dalam pakan tersebut. Metode yang digunakan adalah metode eksperimental. Rancangan penelitian yang digunakan adalah rancangan acak lengkap (RAL), dengan menggunakan 4 perlakuan dan 4 ulangan. Perlakuan dalam penelitian ini menggunakan komposisi yang berbeda yaitu; A ( Pakan Komersial), B (Pakan Komersial 90% + Tepung Rumput Laut 10 %), C (Pakan Komersial 80% + Tepung Rumput Laut 20 %), dan D (Pakan Komersial 70% + Tepung Rumput Laut 30 %). Data Feed Convertion Ratio dan Survival Rate dianalisis menggunakan analisa sidik ragam. Hasil analisa statistik menunjukkan bahwa perlakuan substitusi pakan komersial dengan tepung rumput laut (Glacilaria sp.) terhadap Feed Convertion Ratio dan Survival Rate ikan nila merah (Oreochromis sp.) tidak memberikan pengaruh nyata. Hasil penelitian yang diperoleh yaitu substitusi tepung rumput laut (Glacilaria sp.) dengan pakan komersial dapat memperbaiki nilai Feed Convertion Ratio dan Survival Rate ikan nila, Feed Convertion Ratio terendah terdapat pada pakan C sebesar 3.525, dan perlakuan A memiliki Feed Convertion Ratio paling tinggi yaitu sebesar 4.4425. Sedangkan hasil pengamatan kelangsungan hidup (%) tertinggi ditunjukkan pada perlakuan B sebesar 80%, sedangkan nilai terendah ditunjukkan pada perlakuan C sebesar 70%. ABSTRACTThe provision of artificial feed aims to provide food in sufficient quantities, on time, and with high nutritional value and to be sustainable. One good indicator of cultivation is Feed Convertion Ratio and Survival Rate. Feed Convertion Ratio (FCR) of fish feed depends on the raw material used in the feed. The method used is the experimental method. The experiment method use was a completely randomized design (CRD) consisting of four treatrments and three replication. The treatment in this study uses different compositions namely; A (Commercial Feed), B (90% Commercial Feed + 10% Seaweed Flour), C (80% Commercial Feed + Seaweed Flour 20%), and D (70% Commercial Feed + Seaweed Flour 30%). Feed Convertion Ratio (FCR) and Survival Rate (SR) data were analyzed using variance analysis. The results of statistical analysis showed that the substitution treatment of commercial feed with seaweed flour (Glacilaria sp.) On Feed Convertion Ratio and Survival Rate of red tilapia (Oreochromis sp.) Did not have a significant effect. The results obtained are substitution of seaweed flour (Glacilaria sp.) With commercial feed can improve the Feed Convertion Ratio and Survival Rate of tilapia, the lowest Feed Convertion Ratio is found in feed C of 3,525, and treatment A has the highest Feed Convertion Ratio, namely amounting to 4.4425. While the highest survival results (%) are shown in treatment B by 80%, while the lowest value is shown in treatment ...

The process of separating tea leaves caffeine, as well as the enzymes inactivating the polyphenol oxidase and hydro peroxidase were carried out through a dipping process. This study aimed to de-caffeine green tea extracts and focus on maximizing the catechin content and minimizing the caffeine and phenolic contents during the dipping stage. The result showed that the provided variable was 75.25 C, 0.072 leave-to-water ratio, and 9.13 min of dipping time. The response of total phenolic, catechin and caffeine contents are 406.02 mg/g, 27.05 mg/ml, and 0.028 mg/ml, respectively. The highest catechin indicated the minimum polyphenol oxidase performed.