摘要:
A process to produce high melt flow propylene polymer comprises polymerizing propylene in the presence of a titanium-containing, magnesium-containing, high activity catalyst and an aluminum alkyl cocatalyst in a gas phase system which uses condensed liquid to control temperature wherein the external catalyst modifier is a tetraalkylorthosilicate, preferably tetraethylorthosilicate, at process conditions of temperature, hydrogen concentration, and Si/Mg, Al/Mg and Al/Si atomic ratios, to produce a high melt flow propylene polymer at high yield.
摘要:
This invention relates to an apparatus and process for feeding powder or dry solids catalyst into a flowing liquid stream. More particularly, the invention includes an apparatus which includes a novel purging device and means for isolating a metering means from a liquid stream, and process for injecting finely divided flowable powder or catalyst into a flowing liquid stream, which in turn is fed into a reactor utilized for the production of polypropylene or polyolefins.
摘要:
The process and the system are used for carrying out the quench-cooled, vapor-phase polymerization of olefin monomer in a horizontally disposed reactor vessel which comprises contacting olefin monomer, or a mixture of olefin monomers, with a polymerization catalyst system in the presence of hydrogen in the reactor vessel to form a polymer product. The improvement comprises introducing a titanium-containing catalyst component of the catalyst system into the top side of the reactor vessel at a point adjacent to the upstream end of the reactor vessel and introducing a cocatalyst plus modifer component of the catalyst system into the top side of the reactor vessel at a distance, downstream of the point of introduction of the titanium-containing catalyst component, which is equal to 25% of the inside diameter of the reactor vessel.
摘要:
Process for increasing the concentration of normal cis olefins in a hydrocarbon composition with pre-treated molecular sieves which have been heated to a temperature of from 400.degree. to 500.degree. F. for a period of about 1 to 6 hours to reach the water-zeolite equilibrium at said temperature range in the presence of water.
摘要:
A performance scaling device, a processor having the same, and a performance scaling method thereof are provided. The performance scaling device includes an adaptive voltage scaling unit, a latency prediction unit, and a variable-latency datapath. The adaptive voltage scaling unit generates a plurality of operation voltages and transmits the operation voltages to the variable-latency datapath. The variable-latency datapath operates with different latencies according to the operation voltages and generates an operation latency. The latency prediction unit receives the operation latency and a system latency tolerance and generates a voltage scaling signal for the adaptive voltage scaling unit according to the operation latency and the system latency tolerance. The adaptive voltage scaling unit outputs and scales the operation voltages thereof according to the voltage scaling signal.
摘要:
The present invention relates to a method for producing a profile identifying a microorganism based on surface enhanced Raman scattering (SERS) and an apparatus thereof. The method comprises: (1) placing the microorganism on a SERS-active substrate; (2) mounting the microorganism with a mounting solution; (3) obtaining a SERS spectrum of the microorganism in step (2); and (4) analyzing the SERS spectrum to produce the profile.The present invention also relates to a method for detecting morphology alteration of a microorganism due to an antimicrobial agent or an infectious agent based on SERS and an apparatus thereof. The method comprises: (1) placing the microorganism on a SERS-active substrate; (2) mounting the microorganism with a mounting solution; (3) treating the microorganism with a pharmaceutically effective amount of the antimicrobial agent or the infectious agent; (4) obtaining a SERS spectrum of the microorganism in step (3); and (5) identifying effect of the antimicrobial agent or the infectious agent by at least one new peak in the SERS spectrum in step (4) compared to a SERS spectrum of a control sample, wherein the control sample is not treated with the antimicrobial agent or the infectious agent.
摘要:
A floppy module includes a floppy disk controller (FDC), a control circuit, and a display. The FDC has a first control terminal, a second control terminal, and a plurality of third control terminals. Wherein, the first control terminal and the second control terminal may respectively output a first control signal and a second control signal, and the first and second control signals having the same statuses are used for controlling a floppy disk. The display has a fourth control terminal and a plurality of data terminals respectively coupled to a portion of the third control terminals. Additionally, the control circuit may use the first control signal to replace the second control signal for controlling the floppy disk, and transmit the second control signal to the fourth control terminal such that a status information is shown on the display as the floppy disk being idle.
摘要:
The present invention provides a method for detecting a drug resistant microorganism by surface plasmon resonance (SPR). Values of SPR angle shift (V) and the drop of SPR angle shift (D) of control group (V1 and D1) and sample (V2 and D2) can determine the microorganism is drug resistant by identifying (I) ration of V1/V2 larger than 1.001, (II) ration of D1/D2 larger than 1.001 and (III) the SPR angle shift of the sample more smooth or monotonic that that of the control. The present invention further provides SPR as a device used for the method of the present invention.
摘要:
The present invention discloses an LCD drive method, which uses a signal of at least one segment electrode of a multiplex drive element as a common-electrode signal and uses the voltage difference of the above-mentioned segment electrode and the signal of another segment electrode to present images, whereby the multiplex drive element can function as a static drive element. Via the present invention, the multiplex drive element, which can be mass-produced in low costs, can replace the high-cost customized static drive element. Therefore, the present invention can be used as a solution for the static drive LCD and reduce the costs thereof.
摘要:
Circuitry to remove switches from signal paths in integrated circuit programmable gain attenuators. Programmable gain attenuators and programmable gain amplifiers commonly switch between signal levels using semi-conductor switches. Such switches may introduce non-linearities in the signal. By isolating the switches from the signal path linearity of the PGA can be improved.