Medical material production and preparation, and a preparation method of a 4D chitosan-based thermosensitive hydrogel. First, chitosan is dissolved in acetic acid solution; a chitosan-based thermosensitive hydrogel is printed by a 4D bioprinter and lyophilized after solvent extraction, to obtain lyophilized chitosan; subsequently, aqueous -sodium glycerophosphate solution is prepared with ultrapure water and -sodium glycerophosphate, and then aqueous carboxymethyl chitosan solution is prepared with ultrapure water and aqueous -sodium glycerophosphate solution are charged into and mixed well with aqueous carboxymethyl chitosan solution to prepare a mixture; finally, the lyophilized chitosan is crosslinked with the mixture to obtain the 4D chitosan-based thermosensitive hydrogel. With scientific and reliable principles thereof, the present invention solves a problem that conventional thermosensitive hydrogels have uneven pore sizes, and improves the entrapment efficiency and ability of limbal stem cells.

A two piece adapter for extrusion of cylindrical core-shell structures using conventional biomedical needles includes first and second adapter pieces. The first adapter piece includes first and second (core and shell) inlet ports. The core inlet port leads directly to a male Luer fitting attachable to a core needle and surrounded by a threaded chamber. The shell inlet port is led, via a side chamber, into the side of the threaded chamber. The second adapter piece attaches to the bottom of the threaded chamber and is configured to attach to a shell needle, so that the shaft of the core needle sits inside the shaft of the shell needle.

An extrudable hydrogel composition useful for making a three-dimensional organ construct includes a cross-linkable prepolymer, a post-deposition crosslinking group, optionally, an initiator that catalyzes the reaction between the prepolymer and said the crosslinking group; live cells (e.g., plant, animal, or microbial cells), optionally at least one growth factor, and optionally water to balance. Methods of using the same and products so made are also described.

The present invention relates to bioinks based on undenatured collagen, kits containing the same, and methods of printing three-dimensional structures using the bioinks.

The disclosure relates to a cell electrochemical sensor based on a 3D printing technology and application thereof and belongs to the technical field of electrochemical sensors and toxin detection. The cell electrochemical sensor of the disclosure is constructed based on a 3D printing technology, and the construction method comprises the following steps: precisely depositing a cell/carbon nanofiber/GelMA composite hydrogel on a working electrode of a screen-printed carbon electrode through 3D printing, and carrying out curing to obtain the cell electrochemical sensor. The disclosure constructs a cell electrochemical sensor with a three-dimensional cell growth environment and rapid and sensitive response. The cell electrochemical sensor constructed by the disclosure can be used for quickly and effectively determining the combined effect type and effect degree of deoxynivalenol family toxins by combining an electrochemical impedance method and a combination index method.

Described herein are three dimensionally shaped biofabricated materials and method of making three dimensionally shaped biofabricated materials.

Methods and devices are described for using a controlled extensional strain to organize prefibrillar collagen and/or elastin solutions into an organized array of fibrils. The organized array of collagen fibrils produced by the disclosed methods and devices can be used for tissue engineering applications.

The present invention relates to new acid resistant hard pharmaceutical capsules, a process for their manufacture and use of such capsules particularly but not exclusively for oral administration of pharmaceuticals, veterinary products, food and dietary supplements to humans or animals. The capsules of the invention are obtained by aqueous compositions comprising a water soluble film forming polymer and gellan gum in a mutual weight ratio of 4 to 15 weight parts of gellan gum for 100 weight parts of film forming polymer.

The present disclosure is directed to systems and methods for synthesizing a spidroin. In some embodiments, the methods comprise synthesizing a monomer in vivo in a heterologous host, the monomer comprising an N-terminus IntC domain and a C-terminus IntN domain, and post-translationally polymerizing the synthesized monomer via in vitro split-intein mediated polymerization.

A method of forming and implanting a synthetic corneal lenslet in an eye of a patient includes the steps of: forming a synthetic lenslet from a collagen solution using a mold or a 3-D printer that are configured to form the synthetic lenslet into a predetermined shape for correcting a particular refractive error of the patient; forming a cavity for receiving the synthetic lenslet in the cornea of the eye of the patient; inserting the synthetic lenslet into the cavity of the eye; applying a photosensitizer into the cavity of the eye so that the photosensitizer permeates at least a portion of the tissue surrounding the cavity and at least a portion of the synthetic lenslet; and irradiating the cornea so as to activate cross-linkers in the synthetic lenslet and cross-linkers in the portion of the tissue surrounding the cavity, and thereby prevent an immune response.