Various embodiments are described herein for the fabrication enzyme degradable hydrogels useful as payload delivery systems. More particularly, embodiments disclosed herein relate to enzyme-degradable hydrogel systems comprising a crosslinkable polymer, such as a chemically-modified biopolymer, for example, chemically-modified gelatin, the hydrogel formed by a method comprising sequential physical and chemical crosslinking steps, for delivery of various payloads. Enzymes may be selected and administered to tune the release profile of the hydrogel. The payload can be, but not limited to, drugs, markers, cells, or these members encapsulated within another drug delivery such as a nanoparticle, or liposome. The hydrogel system can also be combined with another device such as a contact lens or bandage for wound healing.

Provided is a means capable of measuring an analyte concentration with high accuracy without requiring fractionation of a biological component. The present invention relates to a method for measuring an analyte concentration in a specimen, including (1) preparing the specimen, (2) mixing a coloring reagent, an oxidoreductase, and a light-scattering adjustment reagent with the specimen to obtain an analysis sample having substantially the same scattered light as the specimen, and (3) measuring the analyte concentration by using the analysis sample.

Provided is a means capable of measuring an analyte concentration with high accuracy without requiring fractionation of a biological component. The present invention relates to a method for measuring an analyte concentration in a specimen, including (1) preparing the specimen, (2) mixing a coloring reagent, an oxidoreductase, and a light-scattering adjustment reagent with the specimen to obtain an analysis sample having substantially the same scattered light as the specimen, and (3) measuring the analyte concentration by using the analysis sample.

The present inventions in various aspects provide elastic biodegradable polymers. In various embodiments, the polymers are formed by the reaction of a multifunctional alcohol or ether and a difunctional or higher order acid to form a pre-polymer, which is cross-linked to form the elastic biodegradable polymer. In preferred embodiments, the cross-linking is performed by functionalization of one or more OR groups on the pre-polymer backbone with vinyl, followed by photopolymerization to form the elastic biodegradable polymer composition or material. Preferably, acrylate is used to add one or more vinyls to the backbone of the pre-polymer to form an acrylated pre-polymer. In various embodiments, acrylated pre-polymers are co-polymerized with one or more acrylated co-polymers.

The present inventions in various aspects provide elastic biodegradable polymers. In various embodiments, the polymers are formed by the reaction of a multifunctional alcohol or ether and a difunctional or higher order acid to form a pre-polymer, which is cross-linked to form the elastic biodegradable polymer. In preferred embodiments, the cross-linking is performed by functionalization of one or more OR groups on the pre-polymer backbone with vinyl, followed by photopolymerization to form the elastic biodegradable polymer composition or material. Preferably, acrylate is used to add one or more vinyls to the backbone of the pre-polymer to form an acrylated pre-polymer. In various embodiments, acrylated pre-polymers are co-polymerized with one or more acrylated co-polymers.

Inventive concepts relate generally to nanofibrous scaffolds useful for electrophysiological assays. Scaffolds include polymeric nanofibrous components and electrically excitable cells immobilized at a distinct cell seeding domains on the scaffold. Methods and kits including the scaffolds are also described.

Inventive concepts relate generally to nanofibrous scaffolds useful for electrophysiological assays. Scaffolds include polymeric nanofibrous components and electrically excitable cells immobilized at a distinct cell seeding domains on the scaffold. Methods and kits including the scaffolds are also described.

The present invention is to improve dynamic characteristics while maintaining temperature responsiveness in a cell culture support containing hydroxyalkyl chitosan, and to provide a cell culture support having temperature responsiveness, which contains temperature-responsive hydroxyalkyl chitosan and a water-soluble polymer selected from polyethylene glycol, derivatives thereof, hyaluronic acids, alginic acids and salts thereof.

The present invention is to improve dynamic characteristics while maintaining temperature responsiveness in a cell culture support containing hydroxyalkyl chitosan, and to provide a cell culture support having temperature responsiveness, which contains temperature-responsive hydroxyalkyl chitosan and a water-soluble polymer selected from polyethylene glycol, derivatives thereof, hyaluronic acids, alginic acids and salts thereof.

The invention discloses a method for producing lysine by utilizing adsorption and immobilized fermentation of a recombinant Corynebacterium glutamicum, wherein the recombinant Corynebacterium glutamicum is constructed by simultaneously overexpressing an adenosine triphosphate ATPase while knocking out an extracellular nuclease ExeR in a Corynebacterium glutamicum. The recombinant Corynebacterium glutamicum can effectively improve eDNA secretion of the Corynebacterium glutamicum and reduce eDNA degradation of the Corynebacterium glutamicum, so that the Corynebacterium glutamicum can be more easily adsorbed on a surface of a solid carrier for immobilized fermentation, such that a yield of continuous immobilized fermentation of the Corynebacterium glutamicum is increased by 49.67% than that of free fermentation of an original bacterium, and a fermentation cycle is shortened by 29.17%.