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50 results about "Diad" patented technology

The diad is a structure in the cardiac myocyte located at the sarcomere Z-line. It is composed of a single t-tubule paired with a terminal cisterna of the sarcoplasmic reticulum. The diad plays an important role in excitation-contraction coupling by juxtaposing an inlet for the action potential near a source of Ca²⁺ ions. This way, the wave of depolarization can be coupled to calcium-mediated cardiac muscle contraction via the sliding filament mechanism.

Adhesive alpha-olefin inter-polymers

InactiveUS20020007033A1Minimize adverse interactionHigh activityWax adhesivesPolymer scienceUnsaturated hydrocarbon
The invention relates to novel adhesive alpha-olefin inter-polymers which are largely amorphous and have a Theological behavior that makes them suitable for adhesive use, both without and with minimzed amounts of tackifying resins. Specifically, the invention poly-alpha olefin inter-polymer may be composed of A) from 60 to 94 % of units derived from one alpha mono-olefin having from 3 to 6 carbon atoms and B) from 6 to 40 mol % of units derived from one or more other mono-olefins having from 4 to 10 carbon atoms and at least one carbon atom more than A); and C) optionally from 0 to 10 mol % of units derived from another copolymerizable unsaturated hydrocarbon, different from A) and B); the diad distribution of component A in the polymer as determined by 13C NMR as described herein showing a ratio of experimentally determined diad distribution over the calculated Bernoullian diad distribution of less than 1.07; and the storage modulus G' of said polymer, determined upon cooling as described herein, intersecting a value of 3.105 Pa at a temperature of less than 85 ° C. The invention also describes polymerization processes suitable for the manufacture of these adhesive alpha-olefin inter-polymers.
Owner:EXXONMOBIL CHEM PAT INC

Preparation method of porphyrin photosensitizer and anticarcinogen diad

The invention provides a preparation method of porphyrin photosensitizer and anticarcinogen diad, relates to a preparation method of the diad and solves the technical problems that the porphyrin photosensitizers cannot kill all cancer cells under the light irradiation, the targeting of the anticarcinogen is insufficient, and toxic or side effects are generated. The method comprises the following steps of: 1, preparing midbodies; and 2, preparing the porphyrin photosensitizer and anticarcinogen diad. Because porphyrin and the metal complex compounds thereof have special affinity on the cancer cells, the photosensitizers of 4-hydroxyphenyl porphyrin and anticarcinogen are prepared into the diad, the affinity of the porphyrin on the cancer cells is utilized, so the targeting of the anticarcinogen can be improved, the anti-cancer capability is improved, and in addition, the toxic or side effect is reduced. The anti-cancer effect of the anticarcinogen overcomes the defect of insufficient anti-cancer capability of the porphyrin photosensitizer. Under the conditions of light illumination and dark light, two different anti-cancer mechanisms realize the cooperative effect, the advantage complementation of the anti-cancer effects of the two compounds is realized, the toxic or side effects are reduced under the use condition of the same quantity, and the anti-cancer capability is improved.
Owner:HARBIN INST OF TECH

Elastic polypropylenes and catalysts for their manufacture

A propylene polymeric composition with elastic character that is soluble in at least one nonpolar organic solvent selected from the group consisting of toluene, xylene, heptane, and hexane, comprises greater than 3 weight percent and up to 45 weight percent homotactic sequences each having only r or m diads, all of which homotactic sequences have a helical length in the range of 20 to 150Å, and in the range of 55 to 97 weight percent of the sum of homotactic sequences of less than 20Å in helical length, each homotactic sequence having only r or m diads and having fewer than 10 repeat units with mmmm pentads being present in the range of 0 to 35 weight percent of the total composition, and heterotactic sequences having r and m diads of unequal number, the polymer having a molecular weight (Mw) of at least 70,000.
Owner:3M INNOVATIVE PROPERTIES CO

Chain olefin-cycloolefin copolymer

The invention relates to a chain olefin-cycloolefin copolymer. According to the invention, content of cycloolefin in the chain olefin-cycloolefin copolymer is adjusted, and the copolymer contains diad formed by direct bonding of two cycloolefin constitutional units. Then, the obtained copolymer can show good properties in tensile strength, elongation at break, processability and the like. The chain olefin-cycloolefin copolymer can be used in manufacturing a polymer composition. The chain olefin-cycloolefin copolymer and the polymer composition can be used in manufacturing optical components, packing materials, electronic components, medical instruments and the like.
Owner:CHINA PETROLEUM & CHEM CORP +1

Seal member for fuel cell and fuel cell seal body using same

A sealing member to be used for sealing a constituent member of a fuel cell is provided, the sealing member including a cross-linked product of a rubber composition, in which the rubber composition contains the following components (A) and (B). With this, rubber elasticity is maintained without being lost even under extremely low temperature conditions, and in the case where the sealing member is used in a fuel cell sealed body, an excellent sealing property is exhibited. (A) a rubber component including at least one of an ethylene-propylene rubber or ethylene-propylene-diene rubber having a ratio of ethylene-ethylene diad distribution of at most 29 mol %. (B) a cross-linking agent including an organic peroxide.
Owner:SUMITOMO RIKO CO LTD

4-methyl-1-pentene polymer, resin composition and molded article

A 4-methyl-1-pentene polymer having: a unit derived from 4-methyl-1-pentene of 90 to 100% by mol; a unit selected from ethylene and an α-olefin, other than 4-methyl-1-pentene, having 3 to 20 carbon atoms of 0 to 10% by mol; and the polymer satisfying the following requirements: (a) a meso diad fraction measured by 13C-NMR within the range of 98 to 100%; (b) a ratio of Z-average molecular weight Mz to weight-average molecular weight Mw measured by GPC within the range of 2.5 to 20; (c) a ratio of weight-average molecular weight Mw to number-average molecular weight Mn measured by GPC within the range of 3.6 to 30; (d) a melt flow rate measured under conditions of 260° C. and a 5 kg load (ASTM D1238) within the range of 0.1 to 500 g / 10 min; and (e) an amount of a decane-soluble portion at 23° C. is 5.0% by mass or less.
Owner:MITSUI CHEM INC

Polyfunctional polymer of high stereoregularity and method for producing the same

This invention provides a polyfunctional polymer having high stereoregularity, in particular, isotacticity, and provides a production process thereof. The present invention relates to a polymer having, in a molecule, a repeating unit represented by General Formula (2):wherein R1 and R2 are different, and each represents a hydrogen atom, an alkyl group and an aryl group; * represents an asymmetrical carbon,the polymer containing meso diad (m) and racemo diad (r) at a proportion of 60:40 to 100:0 (m:r).The invention also relates to chemical modifications and a production process of the polymer.
Owner:OSAKA ORGANIC CHEM INDS

Preparation method of porphyrin photosensitizer and anticarcinogen diad

The invention provides a preparation method of porphyrin photosensitizer and anticarcinogen diad, relates to a preparation method of the diad and solves the technical problems that the porphyrin photosensitizers cannot kill all cancer cells under the light irradiation, the targeting of the anticarcinogen is insufficient, and toxic or side effects are generated. The method comprises the following steps of: 1, preparing midbodies; and 2, preparing the porphyrin photosensitizer and anticarcinogen diad. Because porphyrin and the metal complex compounds thereof have special affinity on the cancer cells, the photosensitizers of 4-hydroxyphenyl porphyrin and anticarcinogen are prepared into the diad, the affinity of the porphyrin on the cancer cells is utilized, so the targeting of the anticarcinogen can be improved, the anti-cancer capability is improved, and in addition, the toxic or side effect is reduced. The anti-cancer effect of the anticarcinogen overcomes the defect of insufficient anti-cancer capability of the porphyrin photosensitizer. Under the conditions of light illumination and dark light, two different anti-cancer mechanisms realize the cooperative effect, the advantage complementation of the anti-cancer effects of the two compounds is realized, the toxic or side effects are reduced under the use condition of the same quantity, and the anti-cancer capability is improved.
Owner:HARBIN INST OF TECH

Fluoropolymers

The invention relates to novel linear, semi-crystalline fluoropolymers containing 0.5 to 25 mole percent of at least one vinyl ester monomer unit. At least 40 mole percent of the vinyl ester monomer units are present in the copolymer as single monomer units (not diads or triads or greater) between two fluoromonomer units. The invention also relates to a process for forming the fluoromonomers / vinyl ester copolymer. The fluoropolymer of the invention may be used in applications benefiting from a functional fluoropolymers including as a binder, or for use in forming hydrophilic membranes and hollow fibers.
Owner:ARKEMA INC

Thrombopoietin fusion protein, preparation method and applications thereof

The invention belongs to the field of genetic engineering and pharmacy, and relates to a thrombopoietin fusion protein, a preparation method and applications thereof, particularly to a fusion proteinof a thrombopoietin mimetic peptide (TMP) diad encoded by a yeast preference codon and human serum albumin (HSA), a preparation method and applications thereof. According to the present invention, thefusion protein contains the HSA molecule and the TMP diad encoded by the yeast preference codon, wherein the HSA molecule is located at the N-terminal of the fusion protein, and the TMP diad encodedby the yeast preference codon is located at the C-terminal of the fusion protein; the fusion protein can be highly and stably expressed in yeast, and can be applied to industrial production; and the fusion protein can significantly promote the platelet production, has long half-life in the human body, and can be used for preparing drugs for treatment of various primary or secondary thrombocytopenia and other diseases.
Owner:LANZHOU UNIVERSITY

Hydrogenated tetracyclododecene-based ring-opening polymer and method for producing same

The present invention is: a hydrogenated tetracyclododecene-based ring-opening polymer comprising a repeating unit (A) derived from tetracyclododecene in a ratio of 40 wt % or more based on a total amount of repeating units, a ratio of meso diads in the repeating unit (A) being 65% or more; and a method for producing the same. By means of the present invention, provided are: a crystalline hydrogenated tetracyclododecene-based ring-opening polymer having a high melting point and a high glass transition temperature, and exhibiting excellent heat resistance and excellent processability even after forming due to melt forming; and a method for producing the same.
Owner:ZEON CORP
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