摘要:
A method of making a catalyst comprising mixing a metal oxide precursor and a pore former to form a metal oxide precursor mixture and calcining the metal oxide precursor mixture in the presence of a flowing gas having a flow rate to form the catalyst comprising metal oxide. The catalyst comprises a first distribution of pores having a median pore diameter of 10 to 50 angstroms and a second distribution of pores having a median pore diameter of 1 to 500 angstroms. The median pore diameter of the second distribution of pores is inversely related to the flow rate of the gas.
摘要:
A method of making a catalyst comprising mixing a metal oxide precursor and a pore former to form a metal oxide precursor mixture and calcining the metal oxide precursor mixture in the presence of a flowing gas having a flow rate to form the catalyst comprising metal oxide. The catalyst comprises a first distribution of pores having a median pore diameter of 10 to 50 angstroms and a second distribution of pores having a median pore diameter of 1 to 500 angstroms. The median pore diameter of the second distribution of pores is inversely related to the flow rate of the gas.
摘要:
A method of making a carbonyl compound comprises contacting a compound comprising a secondary hydroxyl group with a basic metal oxide catalyst at a temperature sufficient to maintain the compound comprising a secondary hydroxyl group in a vapor phase.
摘要:
An optical article for being transformed from a pre-activated state of functionality to an activated state of functionality is provided. The optical article includes a convertible element disposed in or proximate to the optical article and being responsive to an external stimulus. The convertible element for irreversibly altering the optical article from the pre-activated state of functionality to the activated state of functionality upon interaction with the external stimulus.
摘要:
A cable routing system for an MRI coil having multiple loops and multiple signal cables provides a non-resonant conductive ring surrounding the loops and grounded to define a low electrical field region along which the signal cables may be routed for reduced interference.
摘要:
A system for altering a functionality of an optical article from a pre-activated state to an activated state, comprising an optical article comprising an optical data layer for storing data, an external radiation source for generating an external stimulus adapted to interact with the optical article, such interaction causing a change in optical accessibility of optically stored data, a directing material, wherein said directing material is for directing the external stimulus to selective portions of the optical article, thereby altering the functionality of the optical article from a pre-activated state to an activated state; a convertible element capable of responding to the external stimulus to irreversibly alter the optical article from the pre-activated state of functionality to the activated state of functionality, wherein said convertible element comprises a color-shift dye, a magnetic material, a thermo-chromic material, a magneto-optical material, a light scattering material, a phase-change material, dye aggregates, or combinations thereof.
摘要:
The vest provides a simple and intuitive coil support assuring proper alignment of the coils with the patient and providing support for coil elements encircling the opposed arms.A coil for receiving and/or transmitting radio-frequency signals for magnetic resonance imaging of the chest, and particularly for ventilation studies of the lungs, is supported in a flexible vest having arm holes locating the coil elements about the patient.
摘要:
MR imaging and intervention functions are localized within a single device. At least one integrated coil device (62,63,64,90) which has at least one RF coil (72,94,112,118), a housing (70,74,92,96,110,114) which encases the RF coil and provides an anatomically conformal surface, and a plurality of apertures. The integrated coil device slides along a guide rail system (66) to adjust the size of a patient anatomical imaging region (60). The apertures in the integrated coil device are available to secure tool holder grid plate inserts (67,116,130,131) or other interventional device guides. The inserts assist in holding the soft tissue for diagnostic imaging and provide support for biopsy/interventional instrument guides (140). The integrated MR imaging and interventional coil device works in combination with a prone patient support structure (20), an adaptive torso sling (55), and also features an open architecture design for improved patient access. The device also works for supine or side imaging procedures.
摘要:
MR imaging and intervention functions are localized within a single device. At least one integrated coil device (62,63,64,90) which has at least one RF coil (72,94,112,118), a housing (70,74,92,96,110,114) which encases the RF coil and provides an anatomically conformal surface, and a plurality of apertures. The integrated coil device slides along a guide rail system (66) to adjust the size of a patient anatomical imaging region (60). The apertures in the integrated coil device are available to secure tool holder grid plate inserts (67,116,130,131) or other interventional device guides. The inserts assist in holding the soft tissue for diagnostic imaging and provide support for biopsy/interventional instrument guides (140). The integrated MR imaging and interventional coil device works in combination with a prone patient support structure (20), an adaptive torso sling (55), and also features an open architecture design for improved patient access. The device also works for supine or side imaging procedures.