Abstract: The disclosure relates to the technical field of food and medical chemical production, and provides a method of preparing an extract of chayote. The method includes: step 1, adding water and a pretreatment agent of ethoxylated p-tert-octylphenol to a chayote powder to obtain a pretreatment mixture; step 2, adding a stabilizer and a cellulase to the pretreatment mixture to perform an enzymolysis treatment to obtain an enzymatic hydrolysate, and centrifuging the enzymatic hydrolysate to obtain a crude extraction liquid; step 3, concentrating the crude extraction liquid to obtain a concentrate, purifying and drying the concentrate to obtain the extract of chayote.

Abstract: The present disclosure relates to methods of treating a tumor with a nucleotide vaccine (e.g., DNA vaccine encoding a tumor antigen) in combination with an IL-7. In some aspects, the IL-7 is administered after the administration of the nucleotide vaccine (e.g., after the peak expansion phase of the tumor-specific T cell immune response) or concurrently with the nucleotide vaccine.

Abstract: The present disclosure is directed to compositions and methods for treating pancreatic cancer. A method of treating pancreatic cancer includes administering a therapeutically effective amount of a composition including a neoantigen vaccine including at least one pancreatic cancer-associated neoantigen and at least one immune checkpoint inhibitor. The methods and compositions of the present disclosure are particularly useful for inducing a neoantigen-specific CD4 or CD8 T cell response against a tumor.

Abstract: An electronic product test jig includes a key testing unit and a circuit testing unit. The key testing unit includes: an X-axis mechanical arm, a Y-axis mechanical arm, a depression mechanical arm that are connected in succession; wherein the X-axis mechanical arm; and a key depression test head disposed at one end of the depression mechanical arm. The X-axis mechanical arm, the Y-axis mechanical arm, and the depression mechanical arm are configured to drive the key depression test head to move and fall over key positions of a product under test so as to complete the test of keys through the key depression test head. A pressure sensor is disposed on the key depression test head.

Abstract: An electronic product test jig includes a key testing unit and a circuit testing unit. The key testing unit includes: an X-axis mechanical arm, a Y-axis mechanical arm, a depression mechanical arm that are connected in succession; wherein the X-axis mechanical arm; and a key depression test head disposed at one end of the depression mechanical arm. The X-axis mechanical arm, the Y-axis mechanical arm, and the depression mechanical arm are configured to drive the key depression test head to move and fall over key positions of a product under test so as to complete the test of keys through the key depression test head. A pressure sensor is disposed on the key depression test head.