7 results about "Picrasma quassioides" patented technology

The invention relates to picrasma quassioides bitter taste element compounds in Chinese picrasma quassioides as well as a preparation method and application thereof, belongs to the technical field of medicines, and particularly relates to 19 picrasma quassioides bitter taste element compounds obtained from branches and leaves of the Chinese picrasma quassioides on the basis of a molecular network annotated with Mzmine and DeepMass from picrasma quassioides which belongs to picrasma quassioides. They structures and configurations are determined by spectral analysis, quantum chemistry calculations, and comparisons of experimental ECD and computational data. In addition, the food refusal activity of all the compounds to plutella xylostella has been assessed, and the food refusal activity of all the compounds to plutella xylostella has been assessed. Wherein part of the compounds show medium antifeedant activity to plutella xylostella. The preparation method is simple and good in reproducibility, and the obtained compound is high in purity.

This invention belongs to the field of pharmaceutical technology and relates to eight glycoside compounds extracted and isolated from the dried leaves of *Picrasma quassioides* Benn, a plant belonging to the genus *Picrasma* in the family Simaroubaceae. The compounds were obtained using chromatographic methods including silica gel chromatography, HP20 column chromatography, ODS column chromatography, and HPLC. This invention also relates to the acetylcholinesterase inhibitory activity of compounds 1-8 and their pharmaceutical uses. The preparation method of this invention is simple, reproducible, and of high purity.

The invention belongs to the technical field of picrasma quassioides cultivation, and provides a picrasma quassioides tissue culture seedling cultivation method. The culture method comprises the following steps: (1) culturing rooting tissue culture seedlings; (2) seedling hardening: performing staged seedling hardening on the rooting tissue culture seedlings; (3) transplanting: preparing a transplanting substrate; disinfecting a transplanting matrix, treating the rooting tissue culture seedlings, and transplanting the treated rooting tissue culture seedlings to the transplanting matrix. According to the cultivation method, the seedling hardening and transplanting stages of picrasma quassioides tissue culture seedling production are improved, and the seedling hardening survival rate and the transplanting survival rate of the picrasma quassioides tissue culture seedlings are further increased, so that the production efficiency and the overall survival rate are increased, and industrial development of the picrasma quassioides tissue culture seedlings is promoted.

The utility model discloses a picrasma quassioides root breeding seedbed, which belongs to the technical field of picrasma quassioides root breeding devices and comprises a bottom frame, stand columns are arranged at four corners of the bottom end of the bottom frame, a moving frame is slidably mounted at the top end of the bottom frame, an adjusting component is arranged between the moving frame and the bottom frame, and a plurality of cultivation frames distributed in a linear array are arranged in the moving frame. Two symmetrically-distributed baffles are fixedly installed at the top end of the cultivation frame, handles are fixedly installed at the top ends of the baffles, a supporting frame is arranged at the top end of the movable frame, supporting blocks are fixedly installed on the two sides of the bottom end of the supporting frame, and bolts are arranged at the tops of the supporting blocks. Through the arrangement of the adjusting assemblies, the effect of adjusting the positions of the moving frames on the bottom frames can be achieved, then the effect of adjusting the distance between every two adjacent moving frames can be achieved, workers can walk conveniently, the placing distance of every two adjacent bottom frames in the greenhouse is reduced, and then the utilization rate of the site space is improved.

The present application belongs to the technical field of aquaculture, and discloses a compound synergist of neomycin sulfate as well as a preparation method and application thereof. The present application discloses, for the first time, the application of Wedelia prostrata extract, Gastrodia extract and Picrasma extract in inhibiting the growth of Vibrio in vitro and in preventing and treating the glass fry disease of South American white shrimp caused by Vibrio infection. Experimental verification shows that the Wedelia prostrata extract, Gastrodia extract and Picrasma extract have good effects in inhibiting the growth of Vibrio in vitro when used alone, in combination with each other or simultaneously. Meanwhile, in view of the treatment of Vibrio infection causing the glass fry disease, the above extracts are used in combination with neomycin sulfate, so as to overcome the objective problem of low or weak efficacy of neomycin sulfate at a recommended dose, and to simultaneously achieve the enhancement of the efficacy of neomycin sulfate after being used in combination with neomycin sulfate, and the reduction of the usage amount of neomycin sulfate.

The utility model discloses a sterilizing device for picrasma quassioides root breeding seedling, which belongs to the technical field of picrasma quassioides root breeding and comprises a bottom frame, a mixing tank is arranged in the bottom frame, two symmetrically distributed supporting columns are fixedly mounted on the side wall of the mixing tank, and opposite ends of the two supporting columns rotationally penetrate through the bottom frame. A top plate is arranged above the bottom frame, two symmetrically-distributed lifting assemblies are arranged at the top end of the bottom frame, the top ends of the two lifting assemblies are fixedly connected with the bottom end of the top plate, and a first air cylinder is fixedly installed at the top end of the top plate. Through the arrangement of the stirring assembly, the effect of stirring and mixing seeds and medicine powder is achieved, through the cooperation of the multiple sets of first stirring plates and second stirring plates, the mixing uniformity of the seeds and the medicine powder is improved, and the disinfection effect of the equipment is kept.

The present application relates to Brucea javanica bitterwood bitter compound and its preparation method and application, belong to natural medicine chemistry technical field, specifically related to two bitterwood bitter compound extracted and separated from Brucea javanica of Meliaceae Brucea javanica fruit (Brucea javanica), and the biomimetic synthesis method of compound 1, these compounds have good insecticidal activity.In addition, the preparation method of the present application is simple and easy to operate, the reproducibility is good, and the purity is high.