Abstract: The disclosure provides an exosome. The exosome contains Epidermal Growth Factors (EGF) with increased content. The disclosure also provides a preparation method for the exosome. The exosome can be used for the treatment of EGF-related diseases, such as repair and healing of wound surfaces caused by corneal injury, burns, scalds, ulcers, surgeries and the like, and can be used for the prevention of scar hyperplasia.

Abstract: The disclosure provides a lentiviral vector for overexpressing Epidermal Growth Factor (EGF), a recombinant stem cell containing the lentiviral vector, and use of the lentiviral vector and the recombinant stem cell containing the lentiviral vector in the preparation of a medicament for the treatment of related diseases. The lentiviral vector of the disclosure comprises a vector plasmid, wherein the vector plasmid comprises a 5?LTR containing a ? sequence, a 3?LTR, a target gene sequence between the 5?LTR and the 3?LTR, and a promoter sequence and a translation initiation sequence operably linked to the target gene sequence, and the target gene sequence is a nucleotide sequence encoding EGF.

Abstract: A thermal insulation core material and a vacuum insulation panel and a manufacturing process thereof are disclosed. The process for manufacturing a thermal insulation core material comprises: A) stirring and dispersing a mixture of glass fiber cotton and water to obtain a slurry; B) adding water and dilute sulfuric acid into the slurry to obtain a concentration of 0.1% and a pH value in a range of 2.5-3.0; C) removing residue from the slurry to obtain a qualified slurry, the residue comprising unmelted glass fibers; D) transporting the qualified slurry from a high-level tank to a head box, through which the qualified slurry flows onto a forming mesh where the qualified slurry is dehydrated to obtain a plate-shaped core material; E) transporting the plate-shaped core material into a vacuum box for compression and dehydration; and F) drying the plate-shaped core material.