The objective of this study was to analyze gelatins extracted from tilapia (Oreochromis niloticus) skin and evaluate its effect as a coating on fish fillets the same species. Four gelatin extractions skins were prepared in acidic alkaline conditions, followed by filtration freeze drying. samples analyzed for moisture, lipids, ash, proteins, color parameters, viscosity, spectrophotometry coating...

The objective of this study was to investigate the production microbial cellulase by using Aspergillus oryzae and its application in treatment coffee. producing method used for microbe medium submerged fermentation with malt extract medium. determining activity spectrophotometry at wavelength 540 nm 3,5-DNS reagent measure reducing sugar (the product enzymatic reaction). Then, applied on green ...

Sirih merah (Piper crocatum Ruiz & Pav.) leaves has traditionally been used as a medicinal plant. The content of secondary metabolites contained is assessed to show pharmacological activity. in question include tannins, alkaloids, flavonoids, steroids/triterpenoids and saponins. This study aimed determine the total tannin potential antibacterial activity ethanol extract P. leaves. Extractio...

Coffee drinks are that come from the processing and extraction of coffee beans. One which is caffeine. contains approximately 24 most important substances. The purpose this study was to determine level caffeine in various types packaging. research stages include sample collection preparation; identification content; examination levels using UV spectrophotometry. results showed three samples sol...

A metal extraction system using fluorous solvents has been developed. Perfluorinated beta-diketone, 1,1,1,5,5,6,6,6-octafluoro-2,4-hexanedione (C(6)F(8)betaDK) dissolves in the fluorous solvent FC-72 and can extract transition metal ions from water into FC-72. The extraction efficiency in the FC-72 system is comparable to that of chloroform. By using the immiscibility of FC-72 with conventional...