摘要:
New compositions, titanium-ligand complexes and arrays with pyridyl-amine ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with titanium metal centers have high performance characteristics, including high styrene incorporation into ethylene/styrene copolymers.
摘要:
A structure formed from a new family of polyhedral models and rigid structures. The structure having discrete interior and exterior elements, and is formed from a plurality of rigid-stellate polygonal modules. Each rigid-stellate polygonal module has at least three polygonal structures coupled to a rigid stellate connector or axis by a base edge. The angle subtended between each of the at least three polygonal structures may be varied by changing the connector.
摘要:
An exercise device for improving poor visual acuity is disclosed in which a subject must identify randomly chosen figures of minimal visual stimulus projected in a darkened chamber. Earphones are provided to aid in the isolation of the subject and provide audio feedback. The device provides effective treatment for certain eye conditions involving poor acuity and is particularly effective in treating the eye condition known as amblyopia.
摘要:
A new type of robotic device is disclosed, using several cable trussed compression members in concert. The cable trussed compression members are deformed along the length of their central compression mast, by the lengthening and shortening in concert of all of the cables of each cable trussed compression member, through the use of motors. Weights traveling on tracks, or fluid filled hoses, are used in addition to the deformation of the cable trussed compression members, to change the location of the center of gravity of the entire assembly, thereby enhancing the balancing and stability of the robotic device. Additional known mechanical and electrical devices may be used in conjunction with the several cable trussed compression members.
摘要:
A composition is capable of curing via condensation reaction. The composition uses a new condensation reaction catalyst. The new condensation reaction catalyst is used to replace conventional tin catalysts. The composition can react to form a gum, gel, rubber, or resin.
摘要:
A composition is capable of curing via condensation reaction. The composition uses a new condensation reaction catalyst. The new condensation reaction catalyst is used to replace conventional tin catalysts. The composition can react to form a gum, gel, rubber, or resin.
摘要:
In a process for producing polyethylene having a molecular weight of at least 3×105 g/mol as determined by ASTM 4020, ethylene is contacted under polymerization conditions with a slurry of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand, wherein the slurry further includes a scavenger comprising an alkyl magnesium compound.
摘要:
Ligands, compositions, metal-ligand complexes and arrays with substituted bridged bis-biaromatic ligands, and methods of making and using the same, are disclosed that are useful in the catalysis of transformations such as the polymerization of monomers into polymers. The catalysts have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, propylene or styrene. The catalysts also polymerize propylene into isotactic polypropylene.
摘要:
New ligands, compositions, metal-ligand complexes and arrays with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, propylene or styrene. The catalysts also polymerize propylene into isotactic polypropylene.
摘要:
A cannula for use in transferring small volumes of fluid materials, such as in a parallel reaction process. The cannula comprises a long thin needle having various end (port) configurations, and an adapter for connecting the needle to a fluid line. The adapter may include the combination of a reservoir and transition, or simply a transition.