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All Journal Jurnal Kimia Terapan Indonesia

Linar Z.Udin

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Author-ID : 3944111

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology

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FERMENTASI ALFA AMILASE DARI ASPERGILLUS ORYZAE PADA MEDIA SAGU METROXYLON Yetti M. Iskandar; Dine Agustine; A. Sidik; Linar Z.Udin; A. T. Karossi
Jurnal Kimia Terapan Indonesia Vol 4, No 1 (1994)
Publisher : Research Center for Chemistry - LIPI

Alpha amylase is an extracellular enzyme which can be obtained from Aspergillus oryzae fermentation. The production of the alpha amylase in fermentation of sago starch media (Metroxylon sp)in 600, 800 and 1500 ml scale at 30°C for 7 to 9 days in aerobic condition has been conducted. The observations at day-3 indicated that the maximum enzyme specific activity assayed at 40°C for 30 minutes incubation, was 1096 U/g protein, 963 U/g protein and 810 U/g protein for 600, 800 and 1500 ml scale respectively. At this condition starch utilization for growth reached 69% for the 600 and 800 ml scale and 71% for the 1500 ml scale and the biomass production was 6.03 g dry weight/L media, 4.03 g dry weight/L media and 5.66% g dry weight/L media for the 600, 800 and 1500 ml scale respectively.

PRODUKSI GLUKOAMILASE DARI RHIZOPUS ORVZAE L16 PADA MEDIA PATI SAGU (METROXYLON) YANG MENGANDUNG EKSTRAK TAUGE Yetti M.lskandar; Linar Z.Udin; A. T. Karossi
Jurnal Kimia Terapan Indonesia Vol 4, No 2 (1994)
Publisher : Research Center for Chemistry - LIPI

Glucoamylase production from Rhlzopus oryzae L16 has been carrried out in a fermentation medium using sago (Metroxylon sp) starch. Various levels of mung bean sprout extract (1% - 5%) was added into the medium as vitamin source. The fermentation process was carried out at 30°C in aerobic condition with an agitation rate of 120 rpm and for five days. The results of the fermentation was compared with an other fermentation medium containing malt extract 3%. The glucoamylase specific activity of 4500 Unitslg protein, starch consumption of 62.5% and biomass produced of 2.93 g dry weighill: medium were demonstrated with the latter medium. It was found that media which contained 4% mung bean sprout extract had maximum glucoamylase specific activity of 19720 Unitslg protein at day-3. The enzyme activity was assayed at 55°C with incubation time 10 minutes. At this third day of fermentation the starch utilization reached 55.5% and the biomass production was 3.12 g dry weight/L medium.

PENGARUH CARA PENAMBAHAN ENZIM GLUKOAMILASE DAN ION LOGAM ALKALI DAN ALKALI TANAH PADA PROSES SAKARIFIKASI PATI SAGU A. T. Karossi; Agus Muchliawan; Linar Z.Udin; A. Sidik
Jurnal Kimia Terapan Indonesia Vol 5, No 1 (1995)
Publisher : Research Center for Chemistry - LIPI

Production of glucose syrup enzymatically employs both alpha-amylase and glucoamylase. Alpha amylase acts during liquifaction while glucoamylase in the saccharification process. In the present study the glucoamylase was obtained from Rhyzopus oryzae fermentation for five days using 4 liter scale LKB fermentor. The influence of single stage and multiple stage additions of glucoamylase on alpha amylase liquified sago starch indicated no significant difference on the saccharification. The presence of 0.2 - 0.8 mM Li+, Na+, K+, Mg++, Ca++ and-Bar+ salts enchanced the glucoamylase activity whereas at the level of 1 mM they acted as inhibitors. The results of HPLC analysis of the saccharification product showed that the glucoamylase hydrolysed 83.3% of the sago starch yielding free glucose.

Co-Authors A. Sidik A. T. Karossi Agus Muchliawan Agustine, Dine Yetti M. Iskandar Yetti M.lskandar

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