Abstract: An alternating pressure melt impregnation device and a melt impregnation method, including having a resin melt squirted from each resin melt runner on an upper die and a lower die of a melt injection area, and thus the squirted resin melt is enable to be squirted directly on an upper surface and a lower surface of a continuous fiber bundle which is entering into an impregnation chamber. Impregnation and infiltration for both surfaces of the continuous fiber bundle are primarily completed by a squirted pressure. The resin melt inside the impregnation chamber flows to a decompression chambers at both sides of the impregnation chamber. When the resin melt flows to a throttle plate, a re-impregnation for the continuous fiber bundle is realized. Then the pressure is decreased and a section of the resin melt is enlarged and a radial flow is generated due to the Barus effect.

Abstract: An alternating pressure melt impregnation device and a melt impregnation method, including having a resin melt squirted from each resin melt runner on an upper die and a lower die of a melt injection area, and thus the squirted resin melt is enable to be squirted directly on an upper surface and a lower surface of a continuous fiber bundle which is entering into an impregnation chamber. Impregnation and infiltration for both surfaces of the continuous fiber bundle are primarily completed by a squirted pressure. The resin melt inside the impregnation chamber flows to a decompression chambers at both sides of the impregnation chamber. When the resin melt flows to a throttle plate, a re-impregnation for the continuous fiber bundle is realized. Then the pressure is decreased and a section of the resin melt is enlarged and a radial flow is generated due to the Barus effect.

Abstract: Provided is a protein coded by a gene related to cell totipotency and a transcriptional activation domain of a mammalian YAP protein or a fusion protein of a segment with a transcriptional control activity, a coding nucleotide sequence, an expression vector and a composition thereof, as well as a method for inducing the pluripotent stem cells by using the fusion protein.

Abstract: Provided is a protein coded by a gene related to cell totipotency and a transcriptional activation domain of a mammalian YAP protein or a fusion protein of a segment with a transcriptional control activity, a coding nucleotide sequence, an expression vector and a composition thereof, as well as a method for inducing the pluripotent stem cells by using the fusion protein.

Abstract: The present invention discloses a polyamide resin and its application and polyamide composition thereof. The repeating units of the described polyamide resin comprises the following components: dicarboxylic acid units composed 80-100 mol % of polyamide resin; aliphatic diamines units having 2-14 carbon atoms composed 80-100 mol % of polyamide resin; lactam or amino acid units having 6-14 carbon atoms composed 0-20 mol % of polyamide resin; in the described polyamide resin, the bio-based carbon concentration is more than 45%; the described bio-based carbon mole concentration is calculated according to the formula below: bio-based carbon concentration=(bio-based carbon mole content/total organic carbon mole content)*100%. The described polyamide resin in the present invention has low gas volatile, hence the polyamide composition produced thereof has low gas volatile too, and can be applied to food-contact field.