摘要:
Methods of polymerizing at least one olefin include contacting the olefin with a catalyst comprising chromium and with a cocatalyst comprising a non-transition metal cyclopentadienyl (Cp) compound. The polymerization may be performed in the presence of hydrogen. Using the cocatalyst in conjunction with the catalyst increases several properties, such as the high load melt index (HLMI), the MW, and the MN, of the polymers produced by this polymerization method. Polymer compositions produced by such methods have various unique properties, including a PDI greater than about 30. Additional embodiments include articles of manufacture or end use articles formed from such polymer compositions.
摘要翻译:聚合至少一种烯烃的方法包括使烯烃与包含铬的催化剂和包含非过渡金属环戊二烯基(Cp)化合物的助催化剂接触。 聚合可以在氢的存在下进行。 与催化剂一起使用助催化剂增加了几种性质,例如所生产的聚合物的高负载熔体指数(HLMI),M W W N N N N N N N N 通过该聚合方法。 通过这种方法制备的聚合物组合物具有各种独特的性质,包括大于约30的PDI。另外的实施方案包括由这种聚合物组合物形成的制品或最终用途制品。
摘要:
Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. An improved method for preparing cyclopentadienyl complexes used to produce polyolefins is also provided.
摘要:
Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. An improved method for preparing cyclopentadienyl complexes used to produce polyolefins is also provided.
摘要:
This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. This invention also provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer, wherein said catalyst composition comprises contacting an organometal compound, an organoaluminum compound, and a treated solid oxide compound.
摘要:
A rotatable downhole cutting tool configured for enhanced drive consistency in low power circumstances. The tool is equipped with a hydraulic axial drive actuator suitable for use in wireline deployment. The actuator itself includes a reciprocating piston with a ball screw that threadably interfaces a ball nut for dampening the axial drive imparted by the piston. As such, even though hydraulically driven at generally well under about 10 horsepower, bounce in the axial drive is substantially eliminated.
摘要:
A support device including a keyboard platform and a bracket for mounting the keyboard platform a work surface to elevate the keyboard platform above the work surface. The keyboard platform is mounted on the bracket for sliding movement relative to an edge of the work surface along a horizontal fore-aft axis. The keyboard platform is mounted on the bracket for tilting movement about a tilting axis perpendicular to the fore-aft axis. The support device includes a lock movable between a locked position wherein sliding/tilting movement of the keyboard platform is prevented and an unlocked position wherein sliding/tilting movement of the keyboard platform is permitted. One aspect includes a clamp provided on the bracket and engageable with the work surface to elevate the keyboard platform above the work surface. One aspect provides a mouse platform pivotally attached to the keyboard platform and configured to support the mouse at a tilted position.
摘要:
The present invention provides a method for selectively sealing a thief zone in a hydrocarbon reservoir located in a calcium-rich formation and penetrated by a borehole comprising injecting into the thief zone a sealing fluid comprising a mixture of and hydronium ions (H+) and a source of sulfate ions (SO42−) which mixture can provide precipitation of a designated calcium sulfate compound.
摘要:
A seasoning for food that provides taste enhancement and flavor potentiation is disclosed. The seasoning can be used for reducing dietary sodium intake. The portion of seasoning has a mean particle size of less than or equal to 20 microns. In one embodiment, the invention is a seasoning comprising a first seasoning component including a salt and a second seasoning component selected for at least one of complementing and reducing the amount of the first seasoning component required for flavoring a food product.
摘要:
Genetically engineered, CE7-specific redirected immune cells expressing a cell surface protein having an extracellular domain comprising a receptor which is specific for CE7, an intracellular signaling domain, and a transmembrane domain, and methods of use for such cells for cellular immunotherapy of CE7+ neuroblastoma are disclosed. In one embodiment, the immune cell is a T cell and the cell surface protein is a single chain FvFc: receptor where Fv designates the VH and VL chains of a single chain monoclonal antibody to CE7 linked by peptide, Fc represents a hinge-CH2-CH3 region of a human IgG1, and represents the intracellular signaling domain of the zeta chain of human CD3. DNA constructs encoding a chimeric T-cell receptor and a method of making a redirected T cell expressing a chimeric T cell receptor by electroporation using naked DNA encoding the receptor are also disclosed.
摘要翻译:基因工程化的CE7特异性重定向免疫细胞,其表达具有细胞外结构域的细胞表面蛋白,所述胞外结构域包含对CE7特异性的受体,细胞内信号转导结构域和跨膜结构域,以及用于这些细胞用于CE7细胞免疫治疗的方法, 公开了SUP + +神经母细胞瘤。 在一个实施方案中,免疫细胞是T细胞,细胞表面蛋白是单链FvFc: receptor,其中Fv表示V H H和V L, 通过肽连接的对CE7的单链单克隆抗体的“SUB”链,Fc表示人IgG1的铰链C 2 H 2 -C 3 H 3区 SUB>和表示人CD3的zeta链的细胞内信号结构域。 还公开了编码嵌合T细胞受体的DNA构建体和通过使用编码受体的裸DNA通过电穿孔制备表达嵌合T细胞受体的重定向T细胞的方法。
摘要:
A method and seasoning including sea salt for flavoring food is disclosed. The sea salt has a mean particle size less than about 20 microns. In another embodiment, the present invention is directed to a seasoning comprising a first seasoning component, including a sea salt, and a second seasoning component selected for at least one of complementing the first seasoning component and reducing the amount of the first seasoning component required for flavoring a food product. The sea salt component has a mean particle size less than 20 microns.