Claim Missing Document
Check
Articles

Found 2 Documents
Search

ANTAGONIS BAKTERI PROBIOTIK YANG DIISOLASI DARI USUS DAN LAMBUNG IKAN KERAPU BEBEK (CROMILEPTES ALTIVELIS) TERHADAP BAKTERI PATOGEN ', Feliatra; Fitria, Yuni; ', Nursyirwani
Jurnal Perikanan dan Kelautan Vol 17, No 01 (2012)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.17.01.%p

Abstract

Grouper fish has a fairly high economic value, especially in Asiancountries, namely Hong Kong, Singapore, Taiwan and China. High marketdemand. On aquaculture, is one important component of fish feed that plays animportant role in the cultivation. Application of probiotics in aquaculture fish feedhas not been done yet in the Fisheries sector. The research was conducted inOctober 2008, Grouper is used as the intestines and stomach samples were takenas a source of probiotics, whereas pathogenic bacteria obtained from thecollection of marine microbiology laboratory of Faculty of Fisheries and MarineRiau University. From the isolation of bacterial strains found 11 strains that havethe potential as probiotics, then proceed to the molecular test by using rDNA16 s.Which is obtained two strains of probiotic bacteria Bacillus cereus and the speciesof bacteria Strenotrophomonas maltophilia. The test results found that theantagonist Bacillus cereus isolates to inhibit the growth of pathogenic bacteriaAeromonas sp and two species of Vibrio sp. While the bacteriaStrenotrophomonas maltophilia showed no antagonism against pathogens.
EXTRACTION OF POLYPHENOL FROM Sargassum sp. AND ITS ENTRAPMENT IN THE NANOCHITOSAN Wikanta, Thamrin; ', Baihakki; ', Feliatra
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Seaweed is substantial in bioactive compounds of polyphenols that can scavengefree radicals. The aim of this study was to determine the total content of polyphenoliccompounds in the Sargassum sp and its aktivities by using DPPH and FRAP methods.DPPH methods resulting the value of IC50 (Inhibition concentration) and FRAPmethods resulting the total of Fe3+ reduced to Fe2+. Entrapment of Sargassum sp. extractusing nanoparticle chitosan-based was to protect the active compounds in the extract tokeep well the activity of the polyphenol of extraction. Results showed that totalpolyphenol contents of Sargassum polycistum and S. hystrix at 10 mg/ml were 108,64μg/mL and 65,5 μg/mL respectively. IC50 value on DPPH test of S. polycistum and S.hystrix were 667,234 μg/mL and 2861,49 μg/mL, respectively. The reasults of FRAPtest of S. polycistum extracts at concentrations of 100, 500, and 1000 μg/mL were 67,00;127,14; and 214,59 μmol/μg, respectively, while the S. hystrix extract was 48,47; 62,48;80,22μmol/μg extract. Loading capacity of chitosan-STPP and chitosan-carrageenan onpolyphenol were 0,45 and 0,34%, respectively, and entrapment efficiency of Chitosan-STPP and Chitosan-carrageenan were 21,96% and 39,62%, respectively.Keywords: Polyphenol, Sargassum sp, antioxidant , and nanochitosan