Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
 
Articles by Theresia Nur Indah Koni
Total Records ( 2 ) for Theresia Nur Indah Koni
  Theresia Nur Indah Koni , Rusman , Chusnul Hanim and Zuprizal
  Background and Objective: Bacillus subtilis is a bacterium that can produce the oxalate decarboxylase (ODC) enzyme. This enzyme decomposes oxalate. ODC enzyme activity is influenced by temperature and pH. This study was conducted to determine the optimum pH and temperature for ODC enzyme activity in B. subtilis FNCC 0059. Materials and Methods: B. subtilis was cultivated in oxalate medium at different incubation temperatures for 24 h. The tested temperatures were 25, 29, 33, 37, 41 and 45°C. In separate experiments, cultures were grown in oxalate medium at varying pH from 4-8.5. The cell growth assay and enzyme activity were performed and all the experiments were done with 3 replicates. Data were analyzed using one-way analysis of variance. Results: The optimum temperature of 37°C could produce maximum ODC enzyme activity (0.041 U mL–1) enzyme activity increased to the point of the optimum pH and then decreased 5.6% when the pH was increased 0.5 from the optimum. Maximum ODC enzyme activity (0.0413 U mL–1) was achieved at pH 5.5. Conclusion: Temperature and the pH of the medium affected ODC enzyme activity. Optimum medium condition of B. subtilis was reached at 37°C and pH 5.5.
  Theresia Nur Indah Koni , Rusman , Chusnul Hanim and Zuprizal
  Background and Objective: The nutrient and anti-nutrient compositions of a foodstuff affects its utilization as food or feed. The nutrient contents of food ingredients are affected by the environmental conditions in which the plant was grown and oxalate in a foodstuff limits its utilization and exerts a negative effect on consumers. The aim of this study was to evaluate the nutrient value, minerals and anti-nutrient values in Amorphophallus campanulatus (A. campanulatus). Materials and Methods: The A. campanulatus tubers were collected from East Nusa Tenggara, Indonesia and then cleaned, peeled, chopped, sun-dried for 2 days (at 30-32°C), milled into powder and then analyzed for the proximate and anti-nutrient contents. Results: The nutrient content of A. campanulatus flour included crude protein (1.126±0.101%), crude fat (1.173±0%) and crude fiber (3.447±0.142%). The detected minerals included P (1443.33±34.185 mg kg–1), Ca (8535.76±543.75 mg kg–1) and Mg (1512.39±89.28 mg kg–1). Anti-nutrient analysis indicated the presence of oxalates (318.51±3.2 mg kg–1), tannins (0.46±0.04%), cyanide (35878±0.402 ppm) and phytates (0.165±0.015%). Conclusion: These results revealed that A. campanulatus was high in mineral content but low in anti-nutrient content, so it can be used for food or feed.
 
 
 
Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility