Abstract: The present invention provides a non-porous, breathable and waterproof transparent plastic film on a plastic substrate and methods for fabricating the same. The film includes a thermoplastic polyester resin, an amphiphilic modifier having a hydrophilic segment that acts as a channel for water vapor transmission through the film connected to a hydrophobic segment that anchors the amphiphilic modifier to a portion of the polyurethane base resin and a compatibilizer. The resultant non-porous, breathable and waterproof transparent plastic film has a water vapor transmission rate (WVTR) or breathability of not less than 250 g/m2/24 hr according to ASTM E96B, and having at least 90% of the transmittance. They are also resistant to liquid penetration and micro-contaminants such as bacteria and virus, making them suitable for broad applications in medical, healthcare and food packaging industries.

Abstract: The present invention provides a non-porous, breathable and waterproof transparent elastomer film and methods for fabricating the same. The film includes a polyurethane (PU) and an amphiphilic modifier having a hydrophilic segment that acts as a channel for water vapor transmission through the film connected to a hydrophobic segment that anchors the amphiphilic modifier to a portion of the polyurethane base resin. The resultant non-porous, breathable and waterproof transparent elastomer film has a water vapor transmission rate (WVTR) or breathability of not less than 300 g/m2/24 hr according to ASTM E96B, and having at least 90% of the transmittance. The film is also resistant to liquid penetration and micro-contaminants such as bacteria and virus, making it suitable for broad applications in medical, healthcare and food packaging industries.

Abstract: The present invention relates to a recombinant OxDC expressed in a filamentous fungal host cell, methods for constructing a recombinant filamentous fungal host cell, methods for producing recombinant OxDC and the application thereof. The recombinant filamentous fungal host cell comprises one or more copies of OxDC expression cassette integrated in its genome; the expression cassette comprises a promoter, a signal peptide coding sequence, an OxDC coding sequence and a transcription terminator. The host cell can be constructed by random integration or site-specific integration. In addition, the present invention also optimizes the medium formulation for different recombinant filamentous fungal host cells. In the production of the recombinant OxDC, the final yield and enzyme activity were greatly improved. The invention effectively solves the problem that the production of OxDC in the prior art cannot be industrialized on a large scale.

Abstract: The present invention discloses a glycosylated oxalate decarboxylase. The oxalate decarboxylase is derived from edible basidiomycetes, the glycosylated oxalate decarboxylase has an enzyme activity at the pH value of 1.5-7.5, the activity at the pH value of 1.5-2.0 is 10% greater than the optimum activity, and a specific activity is more than 2 U/mg. The present invention also discloses preparation and application of the glycosylated oxalate decarboxylase. The glycosylated oxalate decarboxylase disclosed by the present invention can keep the activity under a low pH value, and can effectively prevent and treat kidney stones.

Abstract: The present invention relates to a recombinant OxDC expressed in a filamentous fungal host cell, methods for constructing a recombinant filamentous fungal host cell, methods for producing recombinant OxDC and the application thereof. The recombinant filamentous fungal host cell comprises one or more copies of OxDC expression cassette integrated in its genome; the expression cassette comprises a promoter, a signal peptide coding sequence, an OxDC coding sequence and a transcription terminator. The host cell can be constructed by random integration or site-specific integration. In addition, the present invention also optimizes the medium formulation for different recombinant filamentous fungal host cells. In the production of the recombinant OxDC, the final yield and enzyme activity were greatly improved. The invention effectively solves the problem that the production of OxDC in the prior art cannot be industrialized on a large scale.

Abstract: The present invention discloses a glycosylated oxalate decarboxylase. The oxalate decarboxylase is derived from edible basidiomycetes, the glycosylated oxalate decarboxylase has an enzyme activity at the pH value of 1.5-7.5, the activity at the pH value of 1.5-2.0 is 10% greater than the optimum activity, and a specific activity is more than 2 U/mg. The present invention also discloses preparation and application of the glycosylated oxalate decarboxylase. The glycosylated oxalate decarboxylase disclosed by the present invention can keep the activity under a low pH value, and can effectively prevent and treat kidney stones.