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Tranggono Tranggono
Fakultas Teknologi Pertanian, Universtas Gadjah Mada, Yogyakarta
Agriculture, Biological Sciences & Forestry

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Model Respirasi BUah Salak Pondoh (Salacca Zallaca cv. Pondoh) yang Disimpan dalam Atmosfir Termodifikasi Berdasarkan Kinetika Enzim Rofandi Hartanto; Suprodjo Suprodjo; Budi Rahardjo; Tranggono Tranggono
agriTECH Vol 23, No 4 (2003)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1200.329 KB) | DOI: 10.22146/agritech.13501

Abstract

The salacca (Salacca zalacca cv. Pondoh) fruits were stored in various modified atmosphere conditions in the impermeable cuverles with the variation of oxygen concentration of 2, 4, 6 and 8%. carbon dioxide concentration of 1, 2. 3 and 4% and nitrogen concentration as the rest. The variation of temperature was 12, 20 and 24 C. Gases within each cuvette were replaced daily. The respiration rate of the fruit was mudded based on the enzyme kinetic theory. The result showed that the respiration model Mows the Michaelis-Menten enzyme kinetic, with CO2 as the uncompetitive inhibitor. The model was fit to predict the respiration rate of the fruit.
Pembuatan dan Karakterisasi Minyak Goreng Rendah Kalori Xilitol Poliester Suhardi Suhardi; Tranggono Tranggono; Supranto Supranto; Sri Hastuti
agriTECH Vol 21, No 3 (2001)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1418.4 KB) | DOI: 10.22146/agritech.13589

Abstract

Xilitol poliester was produced by esterification involving xilitol and fatty acid metil ester (FAME) from DALMS (destilate fatty acid from palm oil). The reaction was affected by : reaction time, temperature and reactant molar ratio. Optimum condition based on response surface methodology (RSM) analysis was as follows : reaction time 6,78 h, reaction temperature 144,5ºC, substrate molar ratio 10, 3:1 and convertion of xilitol poliester 86,4%. Xilitol poliester produced was composed of short chain fatty acid. The physical properties of xilitol poliester (smoke point, melting point, refractive index, spesific gravity and viscosity) were little bit lower than those of palm oil. Analysis of hydrophilic lipophilic balance showed that xilitol poliester may be used as emulsifier. Hydrolitie activity of pancreatic lipase to xilitol poliester lower than that of palm oil. Perokside value of xilitol poliester was lower than that of palm oil.
Co-Authors Budi Rahardjo Rofandi Hartanto Sri Hastuti Suhardi Suhardi Supranto Supranto Suprodjo Suprodjo