Abstract:
Three-dimensional information on a biological parameter relating to at least one selected from viability, proliferating ability, migration, and differentiation of cultured cells can be obtained by a simple two-dimensional analytical technique by constructing a cell evaluation system including a multilayered cell sheet, target cells, and a two-dimensional analyzer.
Abstract:
Parenchymal cells are cultivated on cultivated endothelial cells or cultivated fibroblasts which have been separated by a surface of a specific hydrophilic polymer, and which have been patterned. A culture which contains thus formed patterned spheroids of cultivated parenchymal cells is thereby provided by this invention. This culture maintains a function which is specific to the parenchymal cells over a long period of time.
Abstract:
A temperature-responsive polymer and polymer material which has ester bond(s) and/or acid amide bond(s) respectively at one or more sites in the side chain and can be arbitrarily controlled by varying the side chain is provided. The process for production thereof and the use thereof are also provided.
Abstract:
This invention provides a heterotelechelic oligomer or polymer which is represented by the following formula: ##STR1## wherein A denotes a sugar residue, L denotes a linkage group represented by the following formula ##STR2## wherein R.sup.1 and R.sup.2 independently denote lower alkyl, aralkyl or aryl,X denotes a single bond or --CH.sub.2 CH.sub.2 --, Z denotes a group forming an unsaturated ester or ether, or a functional group such as halogen which binds to --CH.sub.2 CH.sub.2 --, n denotes an integer of 5-10,000, and m denotes an integer of 0 or 2-10,000.This invention also provides a process to produce the above oligomer or polymer, and further a high molecular-micelle with use of a polyethylene oxide-polyester block polymer which has a sugar residue at its terminal. Said oligomer or polymer is expected to exhibit excellent bioavailability, and is also expected to be utilized in the field such as carriers for drug delivery or diagnostic reagents.
Abstract:
The present invention relates to drug carriers composed of a block copolymer having hydrophilic and hydrophobic segments, a polymeric micelle type drug comprising hydrophobic drugs trapped by physical treatments in said drug carrier and methods for trapping hydrophobic drugs in the drug carrier. The drugs carrier composed of the block copolymer according to the invention forms a stable polymeric micelle structure with which hydrophobic drugs can be incorporated very efficiently via physical trapping. It was found that the incorporated drug is stably maintained in micelles even in the presence of serum. In addition, a drug difficult to administer into the living body owing to sparing water-solubility for its high hydrophobicity can be administered in the form of polymeric micelle drug.
Abstract:
A method of manufacturing a molding material includes the steps of winding a thin metal strip on the peripheral surface of a rotary shaft a plurality of turns with a resin material being interposed between the resulting layers of metal, cutting an end surface of the metal strip and the resin material which have been wound by a cutting blade while rotating said rotary shaft to obtain a mixture of metal fibers and resin fibers, and heating the fiber mixture to a temperature at which the resin fibers can be softened. In this way, a molding material in which the metal fibers are substantially uniformly dispersed in the resin material in a closely contacted state can be obtained easily. Furthermore, the contents of the metal fibers by volume in the molding material can be arbitrarily adjusted by changing the rate at which the metal strip and the resin material are wound around the rotary shaft.