Abstract: An Exiguobacterium indicum YAN2 having high-concentration selenite tolerance, the preservation number thereof being GDMCC No. 61594, and a method for fermenting inorganic selenium into nano-selenium by using the strain are provided. The obtained nano-selenium can promote the growth of leaf vegetables, increase the content of chlorophyll, Vc, and total phenol, etc, reduce the content of nitrate, and improve the quality of leaf vegetables. In addition, the present application further provides a nano-selenium liquid fertilizer prepared by fermentation using the strain.

Abstract: A low-temperature smoking body and a preparation method thereof are disclosed. The low-temperature smoking body includes tobacco particles. The tobacco particle includes a particle body and a shell wrapped on the particle body. A carrier is distributed in the particle body and/or the shell. The carrier includes at least one of a raw tobacco material, a non-tobacco material, and a porous material. The carrier carries a smoking agent, and the smoking agent includes a tobacco extract and/or an atomizer. In addition, a preparation method of the low-temperature smoking body is further disclosed. The low-temperature smoking body has better smoking stability and uniformity, and the tobacco particles having core-shell structures can effectively solve the problem of liquid leakage.

Abstract: Abnormally-shaped tobacco granules are provided. The tobacco granules comprise a tobacco granule body and a coating attached to the surface of the tobacco granule body. The coating contains an adhesive. The surface of the abnormally-shaped tobacco granule has one or more grooves and/or ridges, and/or, the abnormally-shaped tobacco granule has through holes therein. The surface grooves of the abnormally-shaped tobacco granules can serve as smoke channels after the tobacco granules are bonded, cured and shaped, so that the air permeability inside a total-granule tobacco product is greatly improved. The smoking resistance of cigarettes is reduced. The flammability of cigarettes is improved and the consumption of tobacco raw materials is reduced. A preparation method of the abnormally-shaped tobacco granules, a tobacco product comprising the abnormally-shaped tobacco granules, and a preparation method thereof are also provided.

Abstract: A humidifying and fresh-keeping device for a refrigerator is provided, including a device container and a top cover. The container has a drawer for storing fruits and vegetables, and a containing chamber is disposed at one side of the container. A drawer-type water tank is disposed in the containing chamber, with a water storing box at one end and an ultrasonic humidifying device at the other end. A supply air box is disposed at a wind outlet of the ultrasonic humidifying device, and an atomizing air duct is distributed in the container. An inlet of the atomizing air duct corresponds to an outlet of the supply air box, and outlets of the atomizing air duct are provided in the containertop cover. As a result, the fruits and vegetables preserved in the container have an environment humidity of 90-95%, and can be kept fresh in seven days.

Abstract: A humidifying and fresh-keeping device for a refrigerator is provided, including a device container and a top cover. The container has a drawer for storing fruits and vegetables, and a containing chamber is disposed at one side of the container. A drawer-type water tank is disposed in the containing chamber, with a water storing box at one end and an ultrasonic humidifying device at the other end. A supply air box is disposed at a wind outlet of the ultrasonic humidifying device, and an atomizing air duct is distributed in the container. An inlet of the atomizing air duct corresponds to an outlet of the supply air box, and outlets of the atomizing air duct are provided in the containertop cover. As a result, the fruits and vegetables preserved in the container have an environment humidity of 90-95%, and can be kept fresh in seven days.

Abstract: Co-cultures of heterogeneous cell populations in a diffusion-constrained microenvironment and methods for co-culturing are disclosed.

Abstract: The invention relates to fuel cell non-humidification operation, specifically to—a method on dry operation condition selection, wherein under condition of inputting dry gas, applying predetermined temperature, pressure and the input flow of the dry gas and detecting the temporary current-voltage curve of the cell. The selection method of this invention can realize steady operation of the cell under non-humidification condition and avoid the dehydration problem of the membrane under the dry gas as well as the “flood” phenomena. The present invention can be applied to not only normal temperature work condition, but also the start and run of the fuel cell under zero degree temperature condition especially. It can simplify the system of the fuel cell and therefore improve the development of the fuel cell.

Abstract: A microfluidic device and method is provided for determining a cell concentration in a sample. The microfluidic device includes a body having a channel therethough that extends along an axis. The channel includes an input and an output, and is at least partially defined by a surface. Indicia overlaps the surface. The channel has a predetermined volume. A portion of the sample is provided in the channel and the cells in the predetermined portions of the channel defined by the indicia are counted.

Abstract: The invention relates to fuel cell non-humidification operation, specifically to—a method on dry operation condition selection, wherein under condition of inputting dry gas, applying predetermined temperature, pressure and the input flow of the dry gas and detecting the temporary current-voltage curve of the cell. The selection method of this invention can realize steady operation of the cell under non-humidification condition and avoid the dehydration problem of the membrane under the dry gas as well as the “flood” phenomena. The present invention can be applied to not only normal temperature work condition, but also the start and run of the fuel cell under zero degree temperature condition especially. It can simplify the system of the fuel cell and therefore improve the development of the fuel cell.

Abstract: Co-cultures of heterogeneous cell populations in a diffusion-constrained microenvironment and methods for co-culturing are disclosed.