exemplified by an inflammatory over-activation producing cytokine storms [64]. The overacting innate system is responsible for directing an impaired adaptive host immune defense in COVID-19 patients [63], and the adaptive immune system’s response is prolonged [3]. In severe COVID...
The invention relates to a highly-stable small-grain NaY molecular sieve. A surfactant is added in the synthesis of a directing agent, and is mixed with a sodium metaaluminate to prepare a surfactant-containing improved directing agent, and water, the improved directing agent, water glass and ...
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By using the 8-amino Bola-type quaternary ammonium surfactant as a structure-directing agent of the beta molecular sieve, the microporous structure is generated; and by aggregation of hydrophobic long chain end radicals of the template, micelle is generated such that the mesoporous structure of the...
According to the invention, the quaternary ammonium surfactant is used as a ZSM-5 zeolite structure directing agent and generates micropores, and aggregation of long hydrophobic alkyl groups at two ends of the surfactant forms meso pores. The method provided by the invention effectively changes an ...
The present invention provides a preparing method of catalyst by catalytic cracking bed oil, characterized in that : (1) a waste poising agent is processed by citric acid solution; (2) a directing agent is prepared by mixing soluble glass and sodium metaaluminate; (3) a lower alkalinity ...
In a still more preferred form, the transmitting transducer is of lead zirconate titanate, find the receiving transducer is of lead meta niobate. The two transducer heads are provided in the one ultrasonic probe and measures the length of the reflecting anomaly from a generally "end-on" ...