Journal ArticleDOI
Optimization of batch fermentation conditions for dextran production
TLDR
The nutrient medium, temperature and initial pH conditions were optimised for batch dextran production in shake flask fermentations using a strain of Leuconostoc mesenteroides NRRL B 512 (F) and the optimal values of tested variables were found to be sucrose, yeast extract and K2HPO4.Abstract:
The nutrient medium (containing sucrose, yeast extract and K2HPO4), temperature and initial pH conditions were optimised for batch dextran production in shake flask fermentations using a strain of Leuconostoc mesenteroides NRRL B 512 (F). A 25−1 fractional factorial central composite experimental design was attempted. Multistage Monte Carlo optimization program was used to maximize the multiple regression equation obtained. The optimal values of tested variables for maximal dextran production were found to be: sucrose, 300 g/l; yeast extract, 10 g/l; K2HPO4, 30 g/l; temperature, 23°C and initial pH 8.3 with a predicted dextran yield of 154 g/l.read more
Citations
More filters
Journal ArticleDOI
Optimization of α-amylase production by Bacillus sp. using response surface methodology
TL;DR: The combined effects of macronutrients of media on α-amylase production by Bacillus sp.
Journal ArticleDOI
Biodegradable plastics from renewable sources
TL;DR: Data is summarized on their use, biodegradability, commercial reliability and production from renewable resources from a variety of sources including microbial fermentations and chemically modified natural products.
Journal ArticleDOI
Levulinic acid production from wheat straw.
TL;DR: The coefficient determination (R(2)) was good for the second-order model and the optimal conditions for levulinic acid production from wheat straw were 209.3 degrees C, 3.5% acid concentration, 15.6 liquid:solid ratio and 37.6 min of reaction time resulted 19.86% yield.
Journal ArticleDOI
Kinetic adsorption of application of carbon nanotubes for Pb(II) removal from aqueous solution.
Nassereldeen Ahmed Kabbashi,Muataz Ali Atieh,Abdullah Al-Mamun,Mohamed E S Mirghami,Md. Zahangir Alam,Noorahayu Yahya +5 more
TL;DR: The results indicates that the highest percentage removal of Pb can be achieved at pH 5, 40 mg/L of CNTs, contact time 80 min, and agitation speed 50 r/min, and the highest correlation coefficients from Langmuir isotherm model indicates the strong adsorptions of P b(II) on the surface of C NTs.
Journal ArticleDOI
Optimization of ultrasound-assisted extraction (UAE) of flavonoids compounds (FC) from hawthorn seed (HS)
TL;DR: The ultrasound-assisted extraction (UAE) of FC from HS was investigated and the optimum levels of these significant parameters were determined using response surface methodology (RSM), which revealed these as follows.