A hyperbranched polymer includes a hyperbranched, hydrophobic molecular core, respective low molecular weight polyethyleneimine chains attached to at least three branches of the hyperbranched, hydrophobic molecular core, and respective polyethylene glycol chains attached to at least two other branches of the hyperbranched, hydrophobic molecular core. Examples of the hyperbranched polymer may be used to form hyperbranched polyplexes, and may be included in DNA or RNA delivery systems.

Free-standing non-fouling polymers and polymeric compositions, monomers and macromonomers for making the polymers and polymeric compositions, objects made from the polymers and polymeric compositions, and methods for making and using the polymers and polymeric compositions

The present invention is directed to improved methods for conjugating polyethylene glycol to polyethyleneimine, and to the use of such polyethylene glycol—polyethyleneimine conjugates to improve the efficiency with which viral and non-viral nucleic acid vectors transfect cells to provide gene therapy, and to improve the efficiency of producing viral particles that comprise therapeutic polynucleotides for use in gene therapy.

The present disclosure provides a means for preventing or suppressing the leaching of a redox mediator constituting a reagent layer in a probe of an embedded biosensor, in particular, a means capable of improving preservation stability (durability) while maintaining glucose measurement sensitivity. The high molecular weight redox polymer according to the present disclosure is represented by general formula (A1), wherein X.sup.− represents an anionic species; L represents a linker; Poly represents a high molecular weight polymer; and R.sup.1 to R.sup.8 each independently represent a hydrogen atom or a substituent. The biosensor according to the present disclosure has a working electrode, a counter electrode, a reagent layer disposed on the working electrode, and a protective film covering at least the reagent layer, and the reagent layer contains an oxidoreductase that oxidizes or dehydrogenates the analyte and at least one high molecular weight redox polymer represented by general formula (A1).

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Materials, methods of making, and methods of using a stable and regenerable immobilized amine sorbents for rare earth element and heavy metal recovery from liquid sources. Embodiments of the invention relate to the novel combination of different polyamines, primarily polyethylenimine Mw=800 (PEI.sub.800), and an epoxysilane, namely 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane (ECTMS), covalently immobilizing theREE and heavy metal-adsorbing amine sites within low cost, porous silica particles.

This invention relates to odor control molecules comprised of polyethyleneimine compounds containing N-halamine and derivatives thereof.

A coating agent includes a main component containing a polyphenol derivative and a polymerizing agent. The coating agent has a pH of no greater than 9, and the polymerizing agent contains a compound having two or more functional groups selected from the group consisting of an amino group and a mercapto group per molecule.

Disclosed herein is a carbon nanodot-polyacrylic acid composite hydrogel including a polyacrylic acid-based gel matrix having carboxyl groups, and a plurality of fluorescent carbon nanodots having amino groups on surfaces thereof. The fluorescent carbon nanodots are formed by subjecting polyethylenimine and hydrochloric acid to a hydrothermal reaction, and are distributed in the polyacrylic acid-based gel matrix. The amino groups of the fluorescent carbon nanodots are covalently bonded with the carboxyl groups of the polyacrylic acid-based gel matrix. Also disclosed herein are a method for preparing and a formulation for forming a carbon nanodot-polyacrylic acid composite hydrogel.

The invention relates to the use of a composition as rheology control agent comprising (A) silicate and (B) a polyethylenimine comprising the structure (I), wherein R.sup.1 is formula (I), or part of the polyethylenimine, and wherein R.sup.2 is H or an organic group, R.sup.3 is H or an organic group, with the proviso that one of R.sup.2 or R.sup.3 is H and wherein the polyethyleneimine has a weight average molecular weight Mw in the range of 40000 to 300000 g/mol before the reaction with the epoxide compound.

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Compositions and methods for determining the origin location of a subterranean sample are provided. Compositions include a polymer-clay composite tag. The tag includes a nanoclay including a plurality of layers, and a polymer intercalated between the layers of the nanoclay. The polymer is functionalized with a fluorescent dye. A method to determine the origin location of a subterranean sample includes mixing a barcoded polymer-clay composite tag into a fluid, flowing the fluid through a work string into a subterranean formation, recovering subterranean samples from the subterranean formation, and determining the origin location of the subterranean sample by detecting the presence of the barcoded polymer-clay composite tag.