This paper studies the method of obtaining higher white-degreedates but adding less H_2O_2 in the process of decoloring bean dregs. Based on the orthogonal experiment, after synthetical analysis, the ideal decoloring condition have been made as follow: the bean dregs concentration of 12% decoloring 7.5 hours at 40℃, adding alkali 1.2% and H_2O_2 only 1.5% to the drying bean dgres.
The optimum hydrolysis conditions were determined by orthogonal design test. When pH was 4.5, the hydrolytic time was 12h , temperature was 40℃, the substrate concentration was 1∶12(soybean residue∶water), 39.03% of soluble dietary extraction was obtained.
The results showed that the content of the crude fiber in the fermented soybean residue was about 23%, decreased by 50%, the content of the water-soluble solid substance, isoflavone and the crude protein about 37%, 0.66mg/g and 32.59% respectively, increased by 5 times, 10% and 32% compared to the fresh soybean residue.
The results are as follow: the maximal binding capacity of Zn2+ and Mg2+ with dietary fiber from soybean dregs is 1087μg/g and 687μg/g at pH5.0, respectively; that of Zn2+ and Mg2+ with extensin from soybean dregs 204μg/g and 147μg/g at pH5.0, respectively;
The preferably enzyme reaction conditions in enhancing CLA content in soybean dregs are: temperature 30℃, water content 80%, fermentation time 7.5h more, pH of buffer system 5.5~7.5. After treatment with enzyme, CLA content increased about 330g CLA/g dry soybean dregs.
Determination the contents of Fe and Cu and Mn and Zn in soybean residues with flame atomic absorption spectrophotometry was studied. The method is quick and accurate,recovery is 88.5%,93.3%,103.5% and 93.0% respectively.
The optimal condition of distill proteins from soybean residues by the Protamex and Flavourzyme was: pH6.0, 3 hours, 55℃, 1:12, and 0.1% of [Enzyme]/[Staple]. Under the conditions of it, the RE of proteins was 55.46% and the DH was 9.50%.
The results show that the fermentation of aspergillus oryzae inoculated into the soybean residues after amplificated culture with bran is at 30℃ for 4 days, it increases the antioxidative properties of extracts from soybean residue.
Treatment with corn and soybean residues resulted in a marked reduction in N mineralization, especially at pH 4.
Amendment of surface soils with corn or soybean residues led to a marked increase in the amount of organic C in aqueous extracts of the soils and in the ability of these extracts to promote denitrification in subsoils.
The third experiment compared the same three manures applied to a bare soil surface or to corn or soybean residues.
Maize derived 37?kg N ha-1 and 31?kg N ha-1 from the added soybean residues, estimated using the direct and indirect approach, respectively, in plots previously sown to soybean.
A/S unsaponifiable mixtures had a more pronounced inhibitory effect on cytokine production than avocado or soybean residues added alone.