摘要:
A hydrocracking catalyst and a process using it are described. The catalyst comprises a dealuminated zeolite bound into a highly porous amorphous support matrix. The catalyst is characterized by its low piece density and a bimodal pore distribution, with the unfinished catalyst having a sizeable amount of macropores having diameters between 5,000 and 9,000 Angstroms. A high amount of mesopores between about 56 and about 297 Angstroms is also desired. The presence of pores between 300 to 500 Angstroms and greater than 10,000 Angstroms in diameter is minimized.
摘要:
A method and apparatus for securely booting a computer system comprises loading secure boot code and a secure operating system from the secure boot code. The method includes authenticating the user in the secure operating system, prior to permitting access to the main operating system.
摘要:
A locking device is provided for preventing an outside door handle assembly, having a handle, a stem extending out from the handle, and a counterweight operably connected between the handle and a release rod, from activating the release rod in response to a motor vehicle impact. The locking device includes a catch fixedly secured to the counterweight and engageable with the stem in response to the motor vehicle impact in order to prevent the handle from activating the release rod.
摘要:
Viable biological material is cryogenically preserved (cryopreservation) by preparing the material for freezing, immersing the material in a tank of cooling fluid, and circulating the cooling fluid past the material at a substantially constant predetermined velocity and temperature to freeze the material. A method according to the present invention freezes the biologic material quickly enough to avoid the formation of ice crystals within cell structures (vitrification). The temperature of the cooling fluid is preferably between −20° C. and −30° C., which is warm enough to minimize the formation of stress fractures in cell membranes due to thermal changes. Cells frozen using a method according to the present invention have been shown to have approximately an 80 percent survival rate, which is significantly higher than other cryopreservation methods.