Abstract: An SNP molecular marker for weight gain trait selection and genetic sex identification of Ictalurus punctatus as well as a screening method and application of the SNP molecular marker are provided. At least one of 17 SNP molecular markers for weight gain trait selection of Ictalurus punctatus and a molecular control means for genetic sex and weight gain trait selection and control of Ictalurus punctatus are further provided. Efficient and scientific identification of Ictalurus punctatus is achieved by means of simple PCR reactions and nucleic acid test strips, and the accuracy rate reaches 100%. A traditional agarose gel electrophoresis method is not used in the whole identification process, the cumbersome steps of gel preparation and running electrophoresis are omitted, nucleic acid dyes are not used, and the experimental process is safe and environmentally friendly.

Abstract: The present invention relates to the technical field of catalyst preparation, and discloses a preparation method of a Ziegler-Natta catalyst. The method includes the following steps: subjecting magnesium halide, alcohol and an electron donor to a first contact reaction in the presence of an inert solvent to obtain a magnesium halide alcoholate and performing first cooling; subjecting titanium halide to second cooling; subjecting the cooled titanium halide, the cooled product containing the magnesium halide alcoholate and an electron donor to a second contact reaction; filtering the product of the second contact reaction to obtain the Ziegler-Natta catalyst; and subjecting the Ziegler-Natta catalyst and the heated titanium halide to a third contact reaction. The method has the advantages such as short cycle, high efficiency, etc., being suitable to industrial production.

Abstract: A sea cucumber preparation and manufacturing method thereof, comprising steps as follows: put the cut and well-cleaned fresh sea cucumber or soaked sea cucumber into an airtight container; at 70˜130° C., gelatinate for 1 min˜20 h, freeze-dry till the water content is less than 10 wt %, then sequentially carry out coarse, ultra-micro and nanometer crushing till the fineness reaches 10˜1000 nm. Add water into the sea cucumber nanometer powder to carry out proteinase enzymolysis, after the enzymolysis is finished, inactivate the proteinase, separate and take the supernatant and dry to get nanometer sea cucumber extract. Evenly mix the extract with panax pseudo-ginseng saponins extract at the proportion of 99˜70%:1˜30%. The content of the sea cucumber polysaccharide in the mixture is 2.5˜8.0 wt %, the content of panax pseudo-ginseng saponins is 0.3˜21.0 wt %. The compound preparation has complementary and synergistic effects on pharmacological effect.

Abstract: A compound sea cucumber product, preparation method thereof and dosage forms thereof are disclosed. A fresh sea cucumber is cut open, the viscus thereof is taken out, and they are well-cleaned respectively and put into an airtight container; at 70˜130° C., gelatinate for 1 min˜20 hours; thereafter freeze-dry till the water content is less than 10 wt %; apply coarse crushing till the fineness reaches 10˜300 mesh; then apply ultra-micro crushing by means of an airflow crusher until the fineness reaches 100˜3000 mesh; lastly apply nanometer crushing by means of high-energy ball grinding mill till the fineness reaches 10˜1000 nm. The nanometer sea cucumber extract is mixed with panax pseudo-ginseng saponins extract at the proportion of 99˜80 wt %:1˜20 wt %.

Abstract: A compound sea cucumber product, preparation method thereof and dosage forms thereof are disclosed. A fresh sea cucumber is cut open, the viscus thereof is taken out, and they are well-cleaned respectively and put into an airtight container; at 70˜130° C., gelatinate for 1 min˜20 hours; thereafter freeze-dry till the water content is less than 10 wt %; apply coarse crushing till the fineness reaches 10˜300 mesh; then apply ultra-micro crushing by means of an airflow crusher until the fineness reaches 100˜3000 mesh; lastly apply nanometer crushing by means of high-energy ball grinding mill till the fineness reaches 10˜1000 nm. The nanometer sea cucumber extract is mixed with panax pseudo-ginseng saponins extract at the proportion of 99˜80 wt %:1˜20 wt %.

Abstract: A sea cucumber preparation and manufacturing method thereof, comprising steps as follows: put the cut and well-cleaned fresh sea cucumber or soaked sea cucumber into an airtight container; at 70˜130° C., gelatinate for 1 min˜20 h, freeze-dry till the water content is less than 10 wt %, then sequentially carry out coarse, ultra-micro and nanometer crushing till the fineness reaches 10˜1000 nm. Add water into the sea cucumber nanometer powder to carry out proteinase enzymolysis, after the enzymolysis is finished, inactivate the proteinase, separate and take the supernatant and dry to get nanometer sea cucumber extract. Evenly mix the extract with panax pseudo-ginseng saponins extract at the proportion of 99˜70%:1˜30%. The content of the sea cucumber polysaccharide in the mixture is 2.5˜8.0 wt %, the content of panax pseudo-ginseng saponins is 0.3˜21.0 wt %. The compound preparation has complementary and synergistic effects on pharmacological effect.