4037 results about "Chemical structure" patented technology

Organometallic compounds and organic electroluminescence devices employing the same are provided. The organometallic compound has a chemical structure represented below:wherein, X is C—H or N, Y is CH2 or NH; R1 is H, or C1-8 alkyl; and A1 is acetylacetone ligand, acetylacetone with phenyl group ligand, or derivatives thereof.

A method of forming an aluminum containing film on a substrate includes providing a precursor having the chemical structure: Al(NR1R2)(NR3R4)(NR5R6); where each of R1, R2, R3, R4, R5 and R6 is independently selected from the group consisting of hydrogen and an alkyl group including at least two carbon atoms. The precursor is utilized to form a film on the substrate including at least one of aluminum oxide, aluminum nitride and aluminum oxy-nitride. Each of the R1-R6 groups can be the same or different and can by straight or branched chain alkyls. An exemplary precursor that has is useful in forming aluminum containing films is tris diethylamino aluminum.

A new class of poly(beta-amino alcohols) (PBAAs) has been prepared using combinatorial polymerization. The inventive PBAAs may be used in biotechnology and biomedical applications as coatings (such as coatings of films or multilayer films for medical devices or implants), additives, materials, excipients, non-biofouling agents, micropatterning agents, and cellular encapsulation agents. When used as surface coatings, these PBAAs elicited different levels of inflammation, both in vitro and in vivo, depending on their chemical structures. The large chemical diversity of this class of materials allowed us to identify polymer coatings that inhibit macrophage activation in vitro. Furthermore, these coatings reduce the recruitment of inflammatory cells, and reduce fibrosis, following the subcutaneous implantation of carboxylated polystyrene microparticles. These polymers may be used to form polyelectrolyte complex capsules for cell encapsulation. The invention may also have many other biological applications such as antimicrobial coatings, DNA or siRNA delivery, and stem cell tissue engineering.

An object is to provide a nonaqueous electrolyte and a nonaqueous-electrolyte secondary battery which have excellent discharge load characteristics and are excellent in high-temperature storability, cycle characteristics, high capacity, continuous-charge characteristics, storability, gas evolution inhibition during continuous charge, high-current-density charge / discharge characteristics, discharge load characteristics, etc. The object has been accomplished with a nonaqueous electrolyte which comprises: a monofluorophosphate and / or a difluorophosphate; and further a compound having a specific chemical structure or specific properties.

A subject is to provide a nonaqueous electrolyte excellent in cycle performances such as capacity retention after cycling, output after cycling, discharge capacity after cycling, and cycle discharge capacity ratio, output characteristics, high-temperature storability, low-temperature discharge characteristics, heavy-current discharge characteristics, high-temperature storability, safety, high capacity, high output, high-current-density cycle performances, compatibility of these performances, etc. Another subject is to provide a nonaqueous-electrolyte secondary battery employing the nonaqueous electrolyte. The subjects have been accomplished with a nonaqueous electrolyte which contains a monofluorophosphate and / or a difluorophosphate and further contains a compound having a specific chemical structure or specific properties.

Polyhydroxyalkanoates (PHAs) from which pyrogen has been removed are provided for use in numerous biomedical applications. PHAs which have been chemically modified to enhance physical and / or chemical properties, for targeting or to modify biodegradability or clearance by the reticuloendothelial system (RES), are described. Methods for depyrogenating PHA polymers prepared by bacterial fermentation processes are also provided, wherein pyrogens are removed from the polymers without adversely impacting the polymers' inherent chemical structures and physical properties. PHAs with advantageous processing characteristics, including low melting points and / or solubility in non-toxic solvents, are also described. PHAs are provided which are suitable for use in in vivo applications such as in tissue coatings, stents, sutures, tubing, bone and other prostheses, bone or tissue cements, tissue regeneration devices, wound dressings, drug delivery, and for diagnostic and prophylactic uses. Properties which are selected for include degradability, elasticity, inclusion of functional groups or derivatized groups, which can in turn be used to attach targeting agents, and bioadhesion.

The instant invention provides an economical flow-through method for determining amount of target proteins in a sample. An antibody preparation (whether polyclonal or monoclonal, or any equivalent specific binding agent) is used to capture and thus enrich a specific monitor peptide (a specific peptide fragment of a protein to be quantitated in a proteolytic digest of a complex protein sample) and an internal standard peptide (the same chemical structure but including stable isotope labels). Upon elution into a suitable mass spectrometer, the natural (sample derived) and internal standard (isotope labeled) peptides are quantitated, and their measured abundance ratio used to calculate the abundance of the monitor peptide, and its parent protein, in the initial sample

The present invention relates to a method of producing a cellulose based paper, the paper itself and the use thereof where the paper exhibits enhanced mechanical properties. The method involves providing a suspension of well dispersed modified cellulose at a low concentration. The properties and the chemical structure of the paper make it suitable for in vivo applications such as implant material.

A cationic fluoric surfactant Gemini and its chemical structure are disclosed. Its advantages are lower critical micell concentration, less consumption, and high dispersity, foam stability, penetrability and wettability.

Fluids viscosified with viscoelastic surfactants (VESs) may have their viscosities reduced (gels broken) by the direct or indirect action of a composition that contains at least one metal ion source and optionally at least one second source. An optional second source may be a chelating agent where at least one reducing agent source may be additionally optionally used. Another optional component with the metal ion source includes a second, different metal ion source. The breaking composition is believed to directly attack the VES itself, possibly by disaggregating or otherwise attacking the micellar structure of the VES-gelled fluid, and / or possibly by changing the chemical structure of the VES to give two or more products.

A toner containing a binder resin containing a resin having a polyester skeleton, a wax containing a hydrocarbon based wax, a colorant, and a charge controlling agent represented by the following chemical structure, wherein the toner has at least one endothermic peak in a range of from 60 to 80 ° C. when measured by a differential scanning calorimetry (DSC). In the chemical structure, M represents one of Li, Na and K, R1, R2, R3 and R4 each, independently, represent one of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and a halogen atom, and n represents an integer of from 1 to 5, and when n is from 2 to 5, each of R1, R2, R3 and R4 can be different from the other.

The invention relates to device making it possible to apply a chromophoric composition to the skin, said device including a chromophoric composition containing at least one chromophoric agent. The chromophoric composition is in the form of a layer of constant thickness bonded to one face of backing, at least prior to being applied to the skin, the chromophoric agent or agents being distributed uniformly in said composition, and the type of the composition being chosen such that light energy from laser radiation is transformed locally into heat and / or the chemical structure(s) of the chromophoric agent(s) is / are modified locally.

The present invention relates to an eudesmane type sesquiterpene derivative 1 beta-hydroxyilicic acid, namely 1 beta-hydroxy-5 alpha H-eudesmane-11 (13)-ethylene-12-acid, its medicineal salt or solvent compound and its medicine composition and medicinal application for preparing medicine capable of curing hepatitis B virus infective disease and resisting hepatitis B virus. Said invention also provides its chemical structure formula.

A system for analyzing a vast amount of data representative of chemical structure and activity information and concisely providing conclusions about structure-to-activity relationships. A computer may adaptively learn new substructure descriptors based on its analysis of the input data. The computer may then apply each substructure descriptor as a filter to establish new groups of molecules that match the descriptor. From each new group of molecules, the computer may in turn generate one or more additional new groups of molecules. A result of the analysis in an exemplary arrangement is a tree structure that reflects pharmacophoric information and efficiently establishes through lineage what effect on activity various chemical substructures are likely to have. The tree structure can then be applied as a multi-domain classifier, to help a chemist classify test compounds into structural subclasses.

The present invention belongs to the field of mnacromolecule, relating to the fluorine-containing polyester of low surface energy and the preparation method of the fluorine-containing polyester. The polyester has the following chemical structure (1): wherein R f C is the straight chain of 2 - 21 C or the branch-chain pseudo-perfluoroalkyl; R1, R2 is the alkyl, aryl, or naphthenic base of the C1-C8; E is -(CH2) m-; formula (3) or formula (4); R' is H or the straight chain or the branch-chain alkyl under C4; m is an integer between 0 or 10. The polyester preparation method is that dibasic acid or the correspondent diester, dihydric alcohol and perfluoroalkane, which are 0.05 percent to 10 percent of the total material weight, are fused and polymerized under vacuum condition. The polyester preparation method at the pseudo-perfluoroalkyl sealed end is simple, and is of good drainage and oil dredging properties. The present invention can be widely used in antifouling coatings, and is of important development and application value.

A plastic film comprising a multi-layer structure obtained by co-casting film formation or sequential-casting film formation of two or more layers of polyarylate having a glass transition temperature of 250° C. or higher and having a chemical structure represented by the following formula: wherein X represents a linking group having a naphthalene or biphenyl structure and A is represented by the following formula: wherein R1 and R2 represent an alkyl group or aryl group, j and k are an integer of from 0 to 4.

Fast-curing modified siloxane compositions comprise; (1) an alkoxy- or silanol-functional silicone intermediate, (2) at least one amine reactive ingredient selected from the group consisting of acetoacetate-functional ingredients, acrylate-functional ingredients, and mixtures thereof, (3) an epoxy-functional ingredient, (4) a curing agent selected from the group consisting of amines, aminosilanes, ketimines, aldimines and mixtures thereof, and (5) water. Other ingredients useful in forming fast-curing modified siloxane compositions of this invention include silanes, organometallic catalysts, solvents, pigments, fillers and modifying agents. The above-identified ingredients are combined and reacted to form a fully cured protective film comprising a cross-linked enamine polysiloxane and / or acrylate polysiloxane chemical structure in a reduced amount of time when compared to conventional epoxy siloxane compositions.

A process for producing a stable high-temperature catalyst for reduction of nitrogen oxides in combustion exhaust gases at operating temperatures from 300° C. to over 700° C. without the need for exhaust dilution. A zeolite material is steam-treated at a temperature and duration sufficient to partially de-aluminize the zeolite to approximately a steady state, but not sufficient to fully collapse its chemical structure. Iron is added to the zeolite material. The zeolite material is calcined at a temperature, humidity, and duration sufficient to stabilize the zeolite material. Examples and specifications for ranges, order, and durations of steaming, calcining, and other steps are provided.

The devices and method are provided for detecting labeled and label-free analytes, such as nucleic acids and proteins, employing conjugated cationic, anionic and neutral polymers. The analytes can be immobilized on a solid support material. The solid support material can be disposed in the pre-fabricated patterns on a substrate. The chemical structures of the polymers employed by the various embodiments of the present invention are described herein.

The invention features dental compositions comprising at least one hybrid monomer that comprises a cyclic allylic sulfide moiety attached to a (meth)acryloyl moiety. These two functional moieties are typically joined either directly to each via a chemical bond or through some chemical structure or spacer molecule. The composition may optionally contain additional polymerizable compounds, such as ethylenically unsaturated compounds, that are typically used in dental compositions.

The present invention discloses a macromolecular sulfydryl modified derivative with general formula (I) or (II) as well as corresponding dithio-bond cross-linking material and corresponding cross-linking material of sulfydryl reaction active cross linker. Wherein, R1 and R2 include alkylidene, substituted alkylidene, aromatic base, polyether polyols, etc. and R1 and R2 can have the same or different chemical structure; P refers to macromolecular compound residue including carboxyl in the side chain and the molecular weight of the macromolecular sulfydryl modified derivative is 10 to 5 million. The side-chain chemical structure of the macromolecular sulfydryl modified derivative with general formula (I) or (II) is flexible and changeable with notable advantages of adjustable performance, mild preparation conditions, high production rate, high modification and controllability. The cross-linking material of the macromolecular sulfydryl modified derivative provided by the present invention can be used to inhibit the attachment of cells and used as the matrix for cell adhesion and growth.

The instant invention provides an economical flow-through method for determining amount of target proteins in a sample. An antibody preparation (whether polyclonal or monoclonal, or any equivalent specific binding agent) is used to capture and thus enrich a specific monitor peptide (a specific peptide fragment of a protein to be quantitated in a proteolytic digest of a complex protein sample) and an internal standard peptide (the same chemical structure but including stable isotope labels). Upon elution into a suitable mass spectrometer, the natural (sample derived) and internal standard (isotope labeled) peptides are quantitated, and their measured abundance ratio used to calculate the abundance of the monitor peptide, and its parent protein, in the initial sample.

A thin film transistor device includes a semiconductor layer. The semiconductor layer includes a compound comprising a chemical structure represented by:wherein each R is independently selected from hydrogen, an optionally substituted hydrocarbon, and a hetero-containing group,each Ar is independently selected from optionally substituted aryl and heteroaryl groups,each M is an optional, conjugated moiety,a represents a number that is at least 1,b represents a number from 0 to 20, andn represents a number that is at least 1.

A polymer blend is prepared by dissolving chitosan and a second polymer in an acidic aqueous solution to form an aqueous polymer blend, dehydrating said aqueous polymer blend, and recovering said polymer blend. The second polymer may be selected from the group consisting of polyether glycols including polyethylene glycols; cellulose esters including cellulose acetate; poloxamers; polysaccharides including dextran and guar; polyvinylpyrrolidones; polyvinyl alcohols; and mixtures or copolymers thereof. These polymer blends swell in an acidic environment and deswell in a more neutral or basic environment. This technology is valuable for the dispensing of biologically active material or drugs into a surrounding environment, especially the environment as is found in the gastrointestinal tract. Since the various polymer blends of the present invention are not covalently or ionically crosslinked, but are physically combined, each polymer in the physical blend maintains its original chemical structure, and therefore, is safe for oral administration.

An anthryl derivative group substituted compound having a specific chemical structure is provided. This compound is used for producing an organic luminescent device which can emit luminescent hues with a very high purity and effect light emission with a high luminescence efficiency and a long lifetime.

A inkjet recording medium and ink set including ink containing water, a hydrosoluble organic solvent comprising an amide compound represented by the following Chemical Structure 1, a surface active agent; and a coloring agent, and a recording medium containing a substrate; and a coated layer on at least one side of the substrate, wherein the transfer amount of pure water to the recording medium having the coated layer is 2 ml / m2 to 35 ml / m2 during a contact time of 100 ms and 3 ml / m2 to 40 ml / m2 during a contact time of 400 ms when measured by a liquid dynamic absorption tester at 23° C. and 50% RH:

The present invention provides phenol derivatives represented by the following general formula or pharmaceutically acceptable salts thereof, or prodrugs thereof, which exhibit an inhibitory activity in human SGLT and are useful as agents for the prevention or treatment of a disease associated with hyperglycemia such as diabetes, postprandial hyperglycemia, impaired glucose tolerance, diabetic complications, obesity or the like, and pharmaceutical compositions comprising the same, and pharmaceutical uses thereof. In the chemical structure, R1 and R2 represent H, OH, NH2, etc.; R3and R4represent H, OH, a halogen atom, an optionally substituted alkyl group, etc.; ring A represents an aryl group or a heteroaryl group; G represents a group represented by the following general formula (G); E1 represents H or F; and E2 represents H, F, or a methyl group, etc.

This invention provides a nonaqueous electrolyte which is excellent in discharge load properties, as well as in high-temperature storage stability, cycling characteristics, high capacitance, continuous charge properties, storage stability, gas evolution suppression in continuous charging, charge / discharge properties at a high current density, discharge load properties and the like, and a rechargeable battery with a nonaqueous electrolyte. The nonaqueous electrolyte contains a monofluorophosphate and / or a difluorophosphate and further contains a compound having a specific chemical structure orspecific properties.

The present invention relates to a preparation method of beta-methylcarbapenem antibiotic-meropenem. Said invention provides its chemical structure formula, and concrete steps of its preparation method.