37 results about "Nemadectin" patented technology

The invention relates to a culture medium for producing nema rhzomorph by streptomyces fermentation and a cultivation method. The fermentation unit of the nema rhzomorph can be improved, the fermentation cycle can be shortened, the fermentation cost can be reduced, the effect on primary and auxiliary materials caused by the environment is reduced to the maximal extent, and adequate supply of the primary and auxiliary materials is ensured by using the culture medium formula and the fermentation control process provided by the invention, thereby achieving stable and efficient production of the nema rhzomorph.

The invention provides an optimal control method of a nemadectin fermentation impurity. The nimoktin fermentation impurity is of a structure before the moxidectin A impurity synthesis. The method comprises the operation steps of: controlling the age of seeds in a seed tank between 60 hours and 70 hours; reversely mounting bottom parabolic blades of the stirrer in a fermenting tank; and / or in the fermentation process, reducing the rotating speed of the stirrer in the fermenting tank after fermenting for 140 hours. The optimal control method of the nemadectin A1 fermentation impurity, which is provided by the invention, has the beneficial effects that the seed age control of the seed tank is refined and the control of the A1 impurity in the early stage after better viable seeds enter the fermenting tank is benefited; and through repeated observation and comparison, an optimized stirring pattern of the fermenting tank is screened out, the optimized stirring shearing force is small, the mixing is better, observed hyphae are more viable and the A1 impurity control in the early stage, of the fermenting tank, is benefited.