35results about How to "Condition control is simple" patented technology

The invention provides a monascus mutant strain, namely Monascus purpureus yang Ty622, and a method for preparing monascus yellow pigment by submerged fermentation of the strain. The method comprises the steps of: selection and breeding of strain, seed culture, large-capacity tank fermentation and extraction of monascus yellow pigment, wherein the seed culture and the fermentation are implemented in a specifically manufactured culture medium, and multistage fermentation is performed in a large-capacity pot fermentation tank, followed by fermentation; the technological conditions of fermentation are as below: the temperature is from 32 to 36 DEG C, the stirring rotational speed is 200 to 400r / min; the ventilation quantity at earlier stage is from 400 to 500L.min and is then regulated to 500 to 600L.min at middle / later stages. The invention further provides an article prepared according to the above method. The preparation method according to the invention has simple technology and is easy for industrialized production, and the resultant fermented liquid has high content of monascus yellow pigment and low content of citrinin.

The invention relates to a method for detecting photochemical activity of a carbon nano tube by utilizing a transient absorption spectrum technology and belongs to the field of photochemical activity detection of carbon nano tubes. The method comprises the following steps: a, preparing aqueous solution of the carbon nano tube, ultrasonically treating the aqueous solution of the carbon nano tube, standing, and taking supernatant liquid of the aqueous solution of the carbon nano tube as a detection object; b, analyzing photochemical properties of the aqueous solution of the carbon nano tube under illumination conditions by utilizing a laser flash photolysis instrument; and c, verifying and analyzing a characteristic peak of the transient absorption spectrum of the carbon nano tube obtained by the laser flash photolysis instrument in step b by utilizing a pulse radiolysis device. According to the detection method, aiming at a special carbon-based nano material such as the carbon nano tube, the photochemical activity particles in the aqueous solution can be conveniently and reliably detected, the carbon nano tube is insensitive to interference of an external environment, and a carbon nano tube sample is not required to be excessively modified and treated in the earlier stage.

The invention relates to an ultraphonic elastic imaging body model comprising polyacrylamide hydrogel and a scatterer, wherein the polyacrylamide hydrogel forms a reticular structure to wrap the scatterer which is powered graphite having a particle size of 20 micron or less. The elasticity (or the rigidity) of the ultraphonic elastic imaging body model can be freely regulated within a larger range by regulating the concentration of an acrylamide monomer and the sound attenuation coefficient can be changed to accord with the standard of ultraphonic elastic imaging by regulating the proportion of the scatterer.

The invention discloses a method for recycling treatment of a rinsing solution during production of a bleaching powder concentrate. The method comprises the following steps: (1) adding a pickling solution into the rinsing solution at 25-80 DEG C while stirring to ensure that the pH value is equal to 4-5, and stirring uniformly to obtain an orange red sticky substance; (2) adding the pickling solution while stirring to ensure that the orange red sticky substance becomes block liquid; (3) adding the rinsing solution while stirring to ensure that the pH value is equal to 7-7.5 and the black liquid gradually becomes liquid containing orange red particles and generates chlorine, stirring continuously, and collecting chlorine; and (4) filtering the liquid containing the orange red particles to obtain a colorless, clarified and transparent neutral liquid and a red brown filter cake, washing the filter cake, and drying, grinding and firing to obtain iron oxide red. The method disclosed by the invention can be used for treating two types of industrial wastewater, and iron oxide red and chlorine are obtained at the same time, so that the method is green and environment-friendly. The method is short in treatment time, simple to operate, low in energy consumption, and suitable for treatment and production manners under industrial conditions.