9 results about "Liquid medium" patented technology

The invention relates to fields of pesticides and bacterial inhibitors, which particularly relates to an ophiobolin di-sesquiterpene compound derived from seaweed entophytic fungi, and preparation and application thereof. The structural formula is shown in a formula (I). The preparation method comprise: inoculating Aspergillus ustus cf-42 in a fungus liquid medium to ferment and culture. After purification, the fermentation product is the ophiobolin sesterterpene compound as shown in the formula (I). The ophiobolin di-sesquiterpene compound obtained by the invention can cause a higher death rate of artemia salina sinnaeu which is 78.4% when the compound concentration is 100 microgram/ml. An insecticidal activity experiment suggests that the median lethal concentration is 48.1 microgram/ml. At the meantime, this compound also possesses substantial bacteriostatic activity.

A method of producing a powder mass for a lithium battery, the method comprising: (a) mixing graphene sheets and an elastomer or its precursor in a liquid medium or solvent to form a suspension; (b) dispersing a plurality of particles of an anode active material in the suspension to form a slurry; and (c) dispensing the slurry and removing the solvent and/or polymerizing/curing the precursor to form the powder mass, wherein the powder mass comprises multiple particulates of the anode active material, wherein at least one of the particulates is composed of one or a plurality of the particles encapsulated by a thin layer of graphene/elastomer composite having a thickness from 1 nm to 10 μm, a lithium ion conductivity from 10⁻⁷ S/cm to 10⁻² S/cm and an electrical conductivity from 10⁻⁷ S/cm to 100 S/cm.

The invention discloses a variable-focus cavity type lens based on a dielectric elastomer. The lens comprises a lens driver which consists of a first dielectric elastomer film, a second dielectric elastomer film and a flexible electrode, and the first dielectric elastomer film and the second dielectric elastomer film are fixedly pasted on an annular supporting frame. The first dielectric elastomerfilm and the second dielectric elastomer film are symmetrically arranged and attached to each other, arc-shaped grooves are formed in the first dielectric elastomer film and the second dielectric elastomer film, the two sets of arc-shaped grooves correspond to each other, a cavity is formed between the two sets of arc-shaped grooves, and the cavity is filled with transparent liquid media. Flexible electrodes are coated from the peripheries of the arc-shaped grooves of the first dielectric elastomer film and the second dielectric elastomer film to the annular part of the annular support frame.The lens is made of the dielectric elastomer film, the flexible electrode and the transparent liquid medium, wherein the zoom imaging effect can be achieved by changing the shape of the cavity of thezoom lens, and the zoom lens has the advantages of being light in structure, small in size and the like.

The invention relates the microbial preparation field, in particular to a simple and rapid propagation method of EM (effective microorganisms). Specifically, the method includes: optimized preparation of a liquid medium, selection and application of a culture vessel, strain selection, and cultivation method and process of EM. The method provided in the invention is characterized in that: cheap and easily available rice meal, brown sugar and corn meal are taken as main nutrient sources to prepare the liquid medium with reasonable and comprehensive nutrition; by reasonably selecting a white plastic bucket or a glass bucket (bottle) as the culture vessel and then adjusting the temperature and illumination intensity of the cultivation environment, the EM product with high quality and strong vitality can be obtained by only 3-4 days. The EM product produced by the method provided in the invention has a high bacterium content and good quality, and can be widely applied in crop farming, breeding industry, food processing, environmental protection and other fields.

A naked-eye 3D lens display device and a method for manufacturing the same are disclosed. The present disclosure relates to the technical field of 3D display, and particularly to a naked-eye 3D display technology. The technical problem that the lens of the display device in the prior art cannot be switched between 3D display mode and 2D display mode can be solved. The two electromagnetic shielding films are arranged facing each other. The frame and spacers are arranged between the two electromagnetic shielding films, and the frame and spacers and the two electromagnetic shielding films form a closed space. The electronically controlled magnetic poles are respectively arranged on two inner walls of the electromagnetic shielding films facing each other. The liquid medium is distributed in the closed space. The transparent magnetic particles are arranged in the liquid medium in the closed space. The display screen is fixed on an outer wall of either of the two electromagnetic shielding films. The beneficial effect lies in that, the naked-eye 3D lens can be switched between 3D display mode and 2D display mode. The 3D lens display device is light and thin, and has a good display effect and a low cost. The naked-eye 3D lens can be used in 3D display products.

The invention discloses a detecting head for trace liquid analysis and capable of eliminating stray light interference. In the precondition of preventing a to-be-detected trace liquid, located on a circular transparent area of a supporting disc, from falling off by arranging the supporting disc at a certain inclination angle, stray light reflected by the supporting disc is deflected from a light ray receiving area of a receiving fiber, wherein all the light ray received by the receiving fiber is light ray passing through the to-be-detected trace liquid and reflected by a reflective sheet, thereby preventing stray light reflected by the supporting disc from entering an optical analysis system through the receiving fiber. Interference due to stray light in optical analysis of the trace liquid medium is eliminated, and the accuracy of optical analysis of the trace liquid medium by a relevant optical analysis system is greatly improved.