@article{Putri_Nurmagustina_2017, title={Kandungan Total Fenol dan Aktivitas Antibakteri Kelopak Buah Rosela Merah dan Ungu Sebagai Kandidat Feed Additive Alami Pada Broiler}, volume={14}, url={https://jurnal.polinela.ac.id/jppt/article/view/157}, DOI={10.25181/jppt.v14i3.157}, abstractNote={<p>Broiler farming always use feed additives commercial to improve productivity of <br />broiler, but feed additives commercial have negative effect for consument. Feed <br />additive should have ability as an antibacterial. To minimize using commercial <br />feed additive we have to find alternatives to optimize the use of roselle calyces. <br />This experiment was conducted to knowing phenol content and antibacterial <br />activity of red roselle (Hibiscus sabdariffa) calyces and purple roselle (Hibiscus <br />sabdariffa) calyces and to determine the type of roselle calyces which have <br />potential as feed additive candidate on broiler. The phenol content was conducted <br />using visible spectrophotometry method with Folin Ciocalteau reagen, and the <br />antibacterial activity using agar well method for measuring clearing zone againt <br />Staphylocccus aureus and Escherichia coli. The results showed that difference in <br />solvent temperature (300<br />C, 600<br />C and 900<br />C) of red and purple roselle calyces <br />didn’t affect the phenol content, but the extract 10% of purple roselle calyces <br />containing phenol content higher than the extract of red roselle calyces. The <br />difference of solvent temperature didn’t affect the antibacterial activity, but <br />extracts 10% of purple roselle calyces have antibacterial activity higher than red <br />roselle calyces. Purple roselle calyces more potencial as feed additive. <br /> <br />Keywords : Roselle (Hibiscus sabdariffa) calyces, phenol content, antibacterial <br />activity</p>}, number={3}, journal={Jurnal Penelitian Pertanian Terapan}, author={Putri, Dwi Desmiyeni and Nurmagustina, Dwi Eva}, year={2017}, month={Jul.} }