A problem is to provide a silver paste which can produce, without variation in resistivity value, a conductive silver coating film exhibiting resistivity substantially equivalent to the resistance value of bulk silver in low-temperature sintering. The problem is solved by providing a silver paste including a silver nanoparticle aqueous dispersion prepared by using a compound having a polyethyleneimine skeleton as a protective agent, a compound having a functional group reactable with nitrogen atoms in the polyethyleneimine, and at least one compound selected from the group consisting of a compound having an amine functional group and a compound having an amide functional group.

A bifunctional polymer is functionalized at one end with an azlactone end group to conjugate biomolecules of interest, and is functionalized at another end with an azide anchor group to attach the polymer to a substrate. Methods of making the bifunctional polymer are also provided. A coated substrate includes the bifunctionalized polymers on the surface of a substrate. Methods of making the coated substrate are also provided. A microarray includes a plurality of discrete regions, each region including the coated substrate.

The present invention relates to a composition for a gel polymer electrolyte comprising a liquid electrolyte solvent, a lithium salt, a polymerization initiator, and a mixed compound of a first compound and a second compound, and a lithium secondary battery comprising a positive electrode, a negative electrode, a separator, and a gel polymer electrolyte, wherein the gel polymer electrolyte is formed by polymerizing the composition for a gel polymer electrolyte.

By comprising a mixed compound of a first compound and a second compound in which the first compound is an amine-based compound comprising polyethylene glycol as a functional group and the second compound is an epoxy-based compound, a composition for a gel polymer electrolyte of the present invention exhibits, when used in a lithium secondary battery, enhanced battery lifespan, excellent high temperature storability, and enhanced battery capacity property by readily inducing a hopping phenomenon.

A composite oligomeric material includes one or more repeating backbone units; one or more polarizable units incorporated into or connected to one or more of the one or more repeating backbone units; and one or more resistive tails connected to one or more of the repeating backbone units or to the one or more polarizable units as a side chain on the polarizable unit, on a handle linking a polarizable unit to a backbone unit, or directly attached to a backbone unit. The composite oligomer material may be polymerized to form a metadielectric, which may be sandwiched between to electrodes to form a metacapacitor.

A biodegradable electroactive material can be doped with a drug and the drug can be delivered to a living subject by stimulating the material with an electrical potential. The material (in this case a polymer) has an electrochemically responsive oligoaniline block terminated with a carboxylic acid moiety and is linked to an alcohol-terminated diol by an ester bond. Advantageously, the diol is PEG-400, PEG-2000, PCL-530, or PCL-2000.

The present invention relates to polydixylitol polymer based gene transporter (PdXYP) and a preparation method thereof. Further, the present invention relates to a nucleic acid delivery complex where the nucleic acids for treatment are conjugated to the gene transporter and a pharmaceutical composition for gene therapy including the complex as an active ingredient. In addition, the present invention relates to the gene transporter, gene delivery complex, and gene therapy using the gene transporter and gene delivery complex. It was confirmed that the PdXYP of the present invention has a considerably higher nucleic acid delivery rate than existing gene transporters, has almost no cytotoxicity in the conjugate when conjugated with DNA, also has very high in vivo transfection efficiency, and above all, especially has considerably high transfection efficiency for brain tissues, which has involved difficulty in gene therapy due to the blood brain barrier for a while. Accordingly, the gene transporter of the present invention can not only be used as experimental gene transporters, but can also be broadly used for various tissues in the body based on the nucleic acids for treatment to be conjugated in the field of gene therapy regarding various diseases.

The present invention relates to water-soluble alkoxylated polyalkyleneimines having an inner block of polyethylene oxide comprising 5 to 18 polyethylene oxide units, a middle block of polyalkylene oxide comprising 1 to 5 polyalkylene oxide units and an outer block of polyethylene oxide comprising 2 to 14 polyethylene oxide units. The middle block is formed from polypropylene oxide units, polybutylene oxide units and/or polypentene oxide units. In addition, the present invention relates to water-soluble alkoxylated polyamines.

Epoxy/MMT composite material and a crosslinking method for epoxy/MMT composite material with second order nonlinear optical properties are introduced. Chromophore-containing intercalating agents are applied to modify montmorillonites (MMTs) to form organoclays by an ion-exchange process, wherein the chrmophores are neatly packed on exfoliated epoxy/organoclay nanocomposites. As a result, optical nonlinearity, i.e. the Pockels effect is observed for the nanocomposites without resorting to the poling process due to self-assembly process. Furthermore, a series of epoxy/MMT nanocomposites comprising thermally reversible furan-norbornene Diels-Alder adducts are prepared to establish a crosslinking feature. Self-alignment behavior, electro-optical (EO) coefficient and temporal stability of the epoxy/MMT nanocomposites are improved by the Diels-Alders crosslinking.

The invention relates to a polymer or oligomer comprising a) An oligomeric or polymeric core comprising carbon atoms and at least one of oxygen atoms and nitrogen atoms, and b) at least three hydrocarbyl terminal and/or pending groups having 12 to 100 carbon atoms, wherein the hydrocarbyl groups are linked to the core via c) a linking moiety comprising i) a urethane group and ii) a group selected from urethane group, urea group, and biuret group.

A well treatment composition for use in a hydrocarbon-bearing reservoir comprising a reversible aminal gel composition is disclosed. The reversible aminal gel composition includes a liquid precursor composition. The liquid precursor composition is operable to remain in a liquid state at about room temperature. The liquid precursor composition comprises an organic amine composition; an aldehyde composition; a polar aprotic organic solvent; and a metal salt composition with valence 3, 4, or 5. The liquid precursor composition transitions from the liquid state to a gel state responsive to an increase in temperature in the hydrocarbon-bearing reservoir. The gel state is stable in the hydrocarbon-bearing reservoir at a temperature similar to a temperature of the hydrocarbon-bearing reservoir, and the gel state is operable to return to the liquid state responsive to a change in the hydrocarbon-bearing reservoir selected from the group consisting of: a decrease in pH in the hydrocarbon-bearing reservoir and an addition of excess metal salt composition in the hydrocarbon-bearing reservoir.