| Food-grade mildew sodium diacetate, calcium propionate and potassium sorbate have being chosen to reformulate into new types of high-performance composite antifungal agents. Subsequently, their antibacterial effect on common fungi and produce of mycotoxins, as well as impact on the storage quality and cooking quality of high moisture grain during the course of grain storage have been researched, so as to develop the use of fungicide formulations and make technical innovation on the emergency storage of grain with high moisture. The results showed that:In the antiseptic compound experiment, we got two kinds of efficient composite mildews with two components (sodium diacetate: potassium sorbate = 4:1 W/W) and three components (sodium diacetate: calcium propionate: potassium sorbate = 6:1:2 W/W), which have a strong inhibitory capacity for common mold, such as Aspergillus flavus and Aspergillus glaucus in grain storage. In the correlation analysis, the correlation coefficients were 0.640 and 0.650 with BIOMIN antibacterial, which were significant (P <0.05).During the Investigation on bacteria carrying in high moisture hsien rice by controlling water gradient, we found that two components 3‰(W/W, similarly hereinafter) could make it safe storage without mildewing for 150d, 160d and 180d, which is obviously superior to other types of fungicide. For high moisture soybean, the inhibitory effect on 20.0% water samples of all kinds of fungicides has no significant difference. BIOMIN, two components and three components which are 2‰and 3‰can make 17.2% water samples be stored safely for 50d without mildewing. BIOMIN, two components and three components which are 3‰can make 15.3% water samples safely stored for 150d without mildewing.Studying the storage and cooking quality indict that after storing the hsien rice for 90d, most of the samples containing the two components with different compositional formulation have smaller Fatty Acid Value than the corresponding sample containing the same mass of other mold inhibitor, and the difference is obvious (P<0.05). The tasting score of the cooking quality is in the range to keep the rice easily, and it tastes much better than other kinds of mold inhibitors. When the compositional formulation of the two components is 3‰, the breakdown value and setback value of the RVA viscosity could meet the standard of good rice, and the setback values of the RVA viscosity present a obvious advantage over other samples (P<0.05). After a storage of 120d, the sample with a compositional formulation of 1‰keep much higher germination percentage than other samples with the same moisture, and adding antiseptic have little affect on the protein contents. After a storage of 180d, 3‰compositional formulation presents minimum gelatinization enthalpy (8.447J/g). And the indica is mycotoxin negative.Study of the soybean's storage quality indicates that after storage of 120d, by adding 1‰and 2‰BIOMIN, 1‰two components or 2‰three components, the water-soluble nitrogen values all hold in the range for a easy storage of soybean. During every operation of two components, the samples containing 10 saturated or unsaturated fatty acid such as palmitic acid, linoleic acid and linolenic acid, and the content has little to do with the mass of antiseptic. The sample containing antiseptic have the highest linoleic acid content (56.089%), while the 3‰the linolenic acid (8.064%). Addition of antiseptic has effect on the soybean's contents of raw fatty acid, however, not obvious.
|
PDF Full Text Request