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All Journal JURNAL ILMU DAN TEKNOLOGI PETERNAKAN
J. C. Likadja
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Computer Science & IT

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Effect of Time and Curing Concentration on Quantity and Quality of Goat Skin Gelatin Produced by Acid Process M. I. Said; J. C. Likadja; M. Hatta
Jurnal Ilmu dan Teknologi Peternakan Vol. 1 No. 2 (2011)
Publisher : Fakultas Peternakan, Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (82.659 KB) | DOI: 10.20956/jitp.v1i2.671

Abstract

Gelatin is widely used in food and non-food industries. One of its utilizations  in the food industry is as a biopolymer packaging materials to extend product shelf life. The quantity and quality of gelatin used is influenced by the production process, especially the curing period. This study aimed to determine the effect of curing time and concentration of curing agent  on the quantity and quality of gelatin produced from goat skin by acid process. Material used in this experiment was goat skin of Ettawah cross male, 1.5 to 3 years old.  The experiment was carried out in a 2x3 factorial arrangement according to completely randomized design with three replications for each treatment combination.  The first factor was curing time, i.e. 2 and 4 days and the second factor was the concentration of curing  agent, i.e. 3, 6 and 9%.  The gelatin was produced by the treatment with acetic acid (CH3COOH 0.5 M, v/v) as the curing  agent.  The results showed that application of CH3COOH 0.5 M with  concentration of 9% for 4 days yielded the best quantity and quality of gelatin, with product characteristics are yields of 16,39% and protein contents of  90.74%.
Isolation and Identification of Bacteria that Has Potential as Producer of Protease Enzyme in the Tannery Industry, PT. Adi Satria Abadi (ASA), Yogyakarta M. I. Said; J. C. Likadja
Jurnal Ilmu dan Teknologi Peternakan Vol. 2 No. 2 (2012)
Publisher : Fakultas Peternakan, Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (209.462 KB) | DOI: 10.20956/jitp.v2i2.710

Abstract

Bacteria are one of the microorganisms that have the potential as a producer of protease enzyme. Tannery industrial waste is one of the media predicted to contain a number of proteolytic bacteria because of the waste generated is composed largely of protein and fat which are good as growing medium for bacteria. This study aimed to isolate and identify bacteria that have the potential as a producer of protease enzyme. Research conducted at the waste water processing installation (WWPI), tannery industry of PT.Adi Satria Abadi (ASA), Sitimulyo, Bantul, Yogyakarta and Laboratory of Animal Product and Food, Faculty of Animal Science, Gadjah Mada University, Yogyakarta. Solid waste (SW), waste water (WW) and soil (S) around the industry are used as source of isolates. Random screening methods used for isolation and identification. The results obtained by isolation and identification of 1264 colonies (621 colonies from the SW, 156 of the WW and 487 of S). Thirty one colonies (2.5%) were identified as potentially proteolytic bacteria by the presence of clear zone (halo) around the colony while the 1.233 colonies (97.5%) were not potential. The third colony isolates look like a white crust, firmly attached to the medium, round, white to resemble wool and convex. Bacterial isolates from the S and SW at pH 10 and 12 were potential as a source of proteases with Proteolytic Index (PI)≥3, while the one isolated from WW was less potential.
Co-Authors M. Hatta M. I. Said