64results about How to "Long-term activity" patented technology

The present invention is directed to an iron-promoted zeolite beta catalyst useful in the selective catalytic reduction of nitrogen oxides with ammonia in which the iron-promoted zeolite beta is treated so as to provide increased amounts of the iron promoter in the form of Fe(OH).The stabilized zeolite is formed by cation exchange of an iron salt into a zeolite beta which has a reduced sodium content such as by exchanging a sodium beta with ammonium or hydrogen cations. A zeolite beta having a reduced carbon content and a Si / Al ratio of no more than 10 also increases the Fe(OH) content of the iron-promoted catalyst. The iron-promoted catalyst which has the iron in the form of Fe(OH) is characterized by a peak at 3680±5 cm−1 in the IR spectra.

The present invention relates to new and improved interleukin-7 polypeptides, as well as compositions comprising the same, their preparation and uses. The invention more particularly relates to hyperglycosylated IL-7 polypeptides having improved properties, as well as their manufacture and therapeutic uses. The invention also discloses novel IL-7 polypeptides having modified amino acid sequences containing artificially created glycosylation site(s), as well as corresponding nucleic acid molecules, vectors and recombinant host cells. The invention also relates to the use of such polypeptides, cells or nucleic acids for curative or preventive treatment of mammalian subjects, including human subjects.

The invention relates to a regeneration cleaning agent for a three-way catalytic converter, which can reactivate the three-way catalytic converter, prolong the service life of the three-way catalytic converter, increase automobile power and reduce oil consumption. The regeneration cleaning agent comprises the following components in percentage by weight: 40 to 60 percent of methyl alcohol, 20 to 40 percent of ethanol, 5 to 10 percent of methylbenzene and 5 to 10 percent of cyclohexane, wherein the methyl alcohol and the ethanol play a main role in generating oxygen ions during the combustion of an engine combustor, and the methylbenzene and the cyclohexane play a main role in generating alkyl free radicals during the combustion of the engine combustor; and the surface superstrata of the three-way catalytic converter can be more effectively removed by combining the oxygen ions and the alkyl free radicals. A method for preparing the regeneration cleaning agent comprises the step of mixing the raw materials at room temperature, and then stirring the mixed raw materials fully and uniformly.

The application provides a strain of Lactobacillus plantarum LP4, the microorganism preservation number of which is CGMCC No.14533. The present application also provides a method for preparing the lyophilized powder of Lactobacillus plantarum LP4 and the lyophilized powder of Lactobacillus plantarum LP4 prepared by using the method. The Lactobacillus plantarum LP4 is coated, and a variety of protective agents are used in combination. In particular, after the first coating on the surface of the Lactobacillus plantarum LP4, a second coating is performed to make up for the coating that may exist in the first coating. Incomplete defects form at least a complete dense protective layer on the surface of the Lactobacillus plantarum LP4 cells, and form a microcapsule structure with the cells, thereby effectively separating the Lactobacillus plantarum LP4 cells from the outside world. The environment is isolated, and a stable internal environment is formed inside the microcapsule, so that the Lactobacillus plantarum LP4 can also maintain activity under normal temperature conditions.

The invention relates to a preparation method for mixed bacteria immobilization particles, in particular to a method which adopts zeolite as a carrier to immobilize the mixed bacteria. The preparation steps are that: prepared seed liquid is vaccinated to the carrier zeolite that is treated, under the condition of being facultative anaerobic, the seed liquid is cultured for 4 to 6 days in constanttemperature to do adsorption, culture and multiplication for 2 to 3 times, and then the zeolite particles immobilized with the mixed bacteria are obtained. The invention adopts the inorganic carrier zeolite to adsorb and immobilize the mixed bacteria with fast adsorption speed to a plurality of bacteria, good multiplication effect and simple operation, the natural environment does not need to be changed and large scale buildings do not need to be built and no secondary pollution is generated. The prepared immobilized particles are put into bottom mud of polluted water of nitrobenzene class toeffectively remove nitrobenzene and aniline from the bottom mud; when the original concentrations of the nitrobenzene and the aniline in the bottom mud are respectively 4.41 mg / kg and 37.84mg / kg, thedegradation rate of the nitrobenzene is up to 100 percent and the degradation rate of the aniline is 52.51 percent. The zeolite resource in the invention is rich with low price.