It could accumulate 6.2g/L L-serine in the medium containing 30g/L glycine and 1% methanol as carbon source when it was cultured for 3 days,and it has an improvement about 67.6% compared with the origin.
Under the condition of shaking flask fermentation,by means of orthogonal test,the effects of nutrition factors,such as glucose,soybean powder,glycerol and 95% ethanol,on the production of phenazine-1-carboxylic acid(PCA) by a genetic engineering strain M18G. The optimized components of culture medium were 6g glucose,22g soybean powder,6mL glycerol,5.9mL 95% ethanol in 1 liter;
The addition of Caco3 in medium was necessary condition for the accumulation of L-malic acid. At the optimal cultural conditions, the Aspergillus flavus HA5800 could accumulate 80-90g/L L-malic acid from 100-120g/L sugar in shake-flask operation.
The optimum temperature is 35℃ and pH is 6.0. The optimum conditional for amylase production as follows:when the fungus was cultured for 30 hours in the optimal amylase-producing culture medium,the cold temperature-amylase activity reached maximal level 34.5U/mL.
the optimal fermentation condition were obtained as follow: initial pH value 7.5,temperauture 30℃,fermentation time 96h,seeding volume 7%,rotated speed 180r/min,75 ml medium in 500ml flask.
The objective of this paper is to deal with a kind of fuzzy linear programming problem based on interval-valued fuzzy sets (IVFLP) through the medium of procedure that turns IVFLP into parametric linear programming via the mathematical programming.
The conclusion that the equilibrium is the continuous function of the dilution rate and substrate concentration in medium in a certain range is concluded.
Many food algae and red tide algae were cultivated in the f/2 medium, and the nitric oxide (NO) concentration of the medium and the cell density were determined.
The effects of the different methods of treatment of anatase titanium dioxide and the relative amouuts of SiO_2, Al_2O_3 and Mn_3(PO_4)_2 in the mixture with which it had been treated on its properties were studied. In basic aqueous medium of pH≥7, the mixture of SiO_2, Al_2O_3 and Mn_3 (PO_4)_2 was precipitated on TiO_2, giving a light resistant pigment which had high dispersity in both water and caprolactam and was capable of delustering polyamide fibers.
Reactive disperse mono-azo dyes containing a β-hydroxy-ethyl sulfonyl sulfuric ester group in diazo component have been synthesized. The preparation of anthraquinone derivatives with the same reactive group are also studied. These dyes reacted chemically in weak alkali medium with synthetic polyamide fibres, such as nylon 66 and 6.
Skim serum is an industrial effluent from rubber factories. It is of higher BOD and contains about 1% protein and 0.05-0.3% ammoniacal nitrogen, etc. The effluent was used to culture Geotrichum candidum as SCP(single-cell protein) feed, thus reducing environmental pollution. This paper describes the optimum technical conditions for culturing Geotrichum candidum with skim serum effluent.The experiments were carried out on a multifactorial and orthogonal design. The results showed that, among the four strains...