6 results about "Lichen acid" patented technology

The application provides application of a formulation of Usnea, Usnic acid or Usnic acid salt in preparation of a product for preventing and treating infectious bursal disease of poultry or complications caused by infection. The application can achieve an outstanding effect of resisting chicken infectious bursal disease by adding the formulation of Usnea or Usnic acid and its salt in feed or water. Meanwhile, the formulation of Usnea or Usnic acid and its salt is low in cost and simple in application as a means of resisting chicken infectious bursal disease, and is beneficial to large-scale promotion.

The invention discloses an application of combination of usnic acid and azole drugs in preparation of an antifungal drug and the antifungal drug, and relates to the technical field of antifungal drugs, systematic in-vitro drug sensitive tests find that although the natural product usnic acid (UA) has limited bacteriostatic activity on various pathogenic fungi, the usnic acid (UA) has limited bacteriostatic activity on various pathogenic fungi; however, when the compound is combined with clinically common azole drugs (such as ITC, VOR, POS and ISA / FLC), the compound can generate a remarkable synergistic killing effect on a series of clinically separated strains.

The invention provides application of usnic acid or usnic acid sodium in prevention and treatment of wheat scab, and belongs to the technical field of pesticides. The natural product usnic acid and the sodium salt thereof disclosed by the invention have a bacteriostatic effect on phytopathogens including fusarium graminearum, pseudofusarium graminearum, magnaporthe oryzae and rhizoctonia cerealis, the content of DON toxin of the fusarium graminearum can be remarkably reduced, and the usnic acid and the sodium salt thereof have good inhibitory activity on fusarium graminearum indoors and in a field; and an important basis is provided for discovery and creation of natural product new pesticides.

The application provides an application of usnic acid or sodium usnate in prevention and treatment of wheat scab, and belongs to the technical field of pesticides.The natural product usnic acid and its sodium salt have inhibitory effects on plant pathogenic fungi Fusarium graminearum, Fusarium pseudograminearum, Pyricularia oryzae and Monographella nivalis, can significantly reduce the content of DON toxin of Fusarium graminearum, and have good inhibitory activity on wheat scab fungi in both indoor and field, thereby providing an important foundation for discovery and creation of new natural product pesticides.

The application provides application of usnic acid or sodium usnate in inhibition of false smut fungus and pyricularia oryzae, and belongs to the technical field of pesticides. The natural product usnic acid and its sodium salt have inhibitory effects on plant pathogenic fungi, such as fusarium graminearum, false smut fungus, pyricularia oryzae and fusarium graminearum, and can significantly reduce the content of DON toxin of fusarium graminearum, and also has good inhibitory activity on wheat scab fungus in indoor and field, thereby providing an important foundation for discovery and creation of new natural product pesticides.

The invention provides a high-yield lichen acid engineering bacterium YAFWY001 and a culture method thereof, and relates to the technical field of microbial biosynthesis. The invention provides an engineering bacterium capable of producing serotonic acid, the engineering bacterium is prepared by transferring a yARGAorsA expression element into a pyrG gene-deleted aspergillus nidulans strain, the yARGAorsA expression element is formed by linking genes Ya5, pyrG, Rib, gbdA (p), OrsA and Ya3 in sequence from the 5end, and the engineering bacterium capable of producing serotonic acid provided by the invention is characterized in that magnesium acetate (YGM) is added into a YG liquid culture medium, so that the engineering bacterium capable of producing serotonic acid is obtained. The content of the lichen acid in the fermentation liquor of the lichen acid producing engineering strain can be obviously increased, and the method is a new way for obtaining the lichen acid at low cost.