Abstract: A method for characterizing the interaction force between lignin and cellulase is provided. The method includes the following steps: (1) preparing a lignin solution, then dropwise adding the solution onto a silicon wafer, repeatedly spin-coating with a spin coater, and vacuum-drying the prepared lignin film; (2) modifying an AFM probe coated with a gold film on the surface with HS-PEG-COOH and then activating the carboxyl group, immersing the AFM probe after the carboxyl group activation in a PBS solution of cellulase for incubation, and after the modification is completed, placing the washed AFM probe in a PBS buffer solution for storage for later use; (3) testing the lignin-cellulase interaction force by using an AFM instrument in a liquid phase environment.

Abstract: A root nodule growth-promoting Microbacterium sp. X-18 and application thereof are provided, relating to the technical field of microorganisms. The root nodule growth-promoting bacterium is classified as Microbacterium sp. X-18, preserved in China Center for Type Culture Collection with a preservation date of Apr. 8, 2019 and a preservation number of CCTCC No: M 2019236; and the preservation address is Wuhan University, Wuhan, China. The Microbacterium sp. X-18 of the disclosure is applied to the leguminous plant Robinia pseudoacacia, which can promote the effective nitrogen fixation of Robinia pseudoacacia, provide the nitrogen required for the growth of Robinia pseudoacacia, and give full play to the symbiotic nitrogen fixation ability of the root nodule growth-promoting growth promoting bacteria and plants, so as to promote the growth and development of Robinia pseudoacacia plants, and has a promising development prospect.

Abstract: A method for characterizing the interaction force between lignin and cellulase is provided. The method includes the following steps: (1) preparation of lignin film: preparing a lignin solution, then dropwise adding the solution onto a silicon wafer, repeatedly spin-coating with a spin coater, and vacuum-drying the prepared lignin film; (2) AFM probe modification: modifying an AFM probe coated with a gold film on the surface with HS-PEG-COOH and then activating the carboxyl group, immersing the AFM probe after the carboxyl group activation in a PBS solution of cellulase for incubation, and after the modification is completed, placing the washed AFM probe in a PBS buffer solution for storage for later use; (3) testing the lignin-cellulase interaction force by using an AFM instrument in a liquid phase environment. AFM is used to quantitatively characterize the interaction between the cellulase and lignin in a liquid environment.

Abstract: A mixed bacteria for promoting nodulation and nitrogen fixation of Robinia pseudoacacia and their application are provided. The mixed bacteria includes Kocuria sp. X-22, Microbacterium sp. X-26, and Bacillus sp. X-28, all of which have been preserved in China Center for Type Culture Collection, and the preservation numbers respectively are: CCTCC No: M 2019237; CCTCC No: M 2019238; CCTCC No: M 2019239. The mixed bacteria are watered directly around the seedlings of Robinia pseudoacacia. Compared with the single bacteria control group and the sterile control group, the disclosure can produce synergistic superimposing effects, significantly improve the nodulation rate and symbiotic nitrogen fixation of the Robinia pseudoacacia, and promote the photosynthesis of the Robinia pseudoacacia.

Abstract: An antibacterial and antiviral degradable mask and a manufacturing method thereof are provided. From outside to inside, the mask sequentially comprises a surface layer (1), a core layer (2), and an inner layer (3) that contacts the face; the surface layer (1) is made of an antibacterial and antiviral cellulose spunlace non-woven fabric; the core layer (2) is made of a polypropylene melt-blown non-woven fabric; the inner layer (3) is made of a polypropylene spunbond non-woven fabric or a degradable natural cotton fabric. The mask can have both antibacterial and antiviral functions; moreover, the material is degradable, and thus, environmental pollution pressure caused by non-degradable petroleum-based fiber materials such as polypropylene can be effectively relieved.

Abstract: A preparation method for a nanocomposite fiber membrane material based on a bio-based liquefied formaldehyde resin is provided. A bio-based raw material is processed through a phenol/polyethylene glycol complex liquefaction process, followed by divalent alkali metal hydroxide high ortho-position induction synthesis resinification and modification with the polymer polyvinyl alcohol to create a spinnable precursor as PVA-BLF. Subsequently, a coaxial electrospinning device is utilized, where PVA-BLF serves as a core layer and a titanium dioxide dispersion is used as a shell layer, to fabricate a PVA-BLF/TiO2 nanocomposite fiber membrane material. The average diameter of the nanocomposite fiber membrane is 150-450 nm, and the specific surface area is 500-700 m2/g. The porosity exceeds 60%, and the fracture elongation ranges from 5.5% to 6.5%, demonstrating excellent filtration performance and excellent regeneration performance, which can be developed as adsorption materials for water and air purification.

Abstract: The present disclosure relates to the technical field of wood preparation, and in particular, to a method and device for preparing a magnetic bamboo wood. A technical problem to be solved in the present disclosure is that: Lignin in a wood will affect the soaking efficiency of the wood during soaking of the wood. In the present disclosure, sodium hydroxide and sodium sulfite in a ratio of 2:1 are put into the soaking bucket in sequence through the high-precision powder weighing equipment and are fully dissolved in distilled water to obtain a solution, so that the solution reacts with the lignin in the bamboo wood to elute the lignin, which increases the porosity of the bamboo wood, improves the soaking efficiency, and improves the magnetism of the bamboo wood.

Abstract: An antibacterial and antiviral degradable mask and a manufacturing method thereof are provided. From outside to inside, the mask sequentially comprises a surface layer (1), a core layer (2), and an inner layer (3) that contacts the face; the surface layer (1) is made of an antibacterial and antiviral cellulose spunlace non-woven fabric; the core layer (2) is made of a polypropylene melt-blown non-woven fabric; the inner layer (3) is made of a polypropylene spunbond non-woven fabric or a degradable natural cotton fabric. The mask can have both antibacterial and antiviral functions; moreover, the material is degradable, and thus, environmental pollution pressure caused by non-degradable petroleum-based fiber materials such as polypropylene can be effectively relieved.

Abstract: A mixed bacteria for promoting nodulation and nitrogen fixation of Robinia pseudoacacia and their application are provided. The mixed bacteria includes Kocuria sp. X-22, Microbacterium sp. X-26, and Bacillus sp. X-28, all of which have been preserved in China Center for Type Culture Collection, and the preservation numbers respectively are: CCTCC No: M 2019237; CCTCC No: M 2019238; CCTCC No: M 2019239. The mixed bacteria are watered directly around the seedlings of Robinia pseudoacacia. Compared with the single bacteria control group and the sterile control group, the disclosure can produce synergistic superimposing effects, significantly improve the nodulation rate and symbiotic nitrogen fixation of the Robinia pseudoacacia, and promote the photosynthesis of the Robinia pseudoacacia.

Abstract: A method for spraying Robinia pseudoacacia on exposed shale wall to efficiently and rapidly restore green and improve soil pH value is provided. External-soil spray seeding is used to spray mixed microorganisms, organic fertilizer, and soil on exposed shale walls with a green plant of Robinia pseudoacacia to efficiently and rapidly restore green and improve soil pH value. The mixed microorganisms include Kocuria sp. X-22, Microbacterium sp. X-26, Bacillus sp. X-28 and Microbacterium sp. X-18, and the mixed microorganisms are added to organic fertilizer and soil by fermentation broth. The weight ratio of mixed microorganisms, organic fertilizer and soil is 1:1:8. The method can promote the rapid growth of Robinia pseudoacacia on the exposed shale wall and significantly increase organic matter content, effective phosphorus content, and pH value of the Robinia pseudoacacia soil.

Abstract: A method and special complex enzyme for hydrolyzing a galactomannan (GM) to prepare a small-molecule GM and a galactomannan oligosaccharide (GMOS) is provided. The method includes: conducting fermentation with microcrystalline cellulose (MCC) and melibiose as carbon sources and Trichoderma reesei (T. reesei) as an enzyme-producing strain to obtain a supernatant, which is a complex enzyme solution with enzymatic activities of ?-mannanase and ?-galactosidase; and directly using the complex enzyme solution for enzymatic hydrolysis of a GM as a substrate to prepare the small-molecule GM and the GMOS.

Abstract: Provided is a node diaphragm scraping and sorting device for a bamboo split, which is configured to scrape node diaphragms of the bamboo splits and to sequentially sort the bamboo inner layers and bamboo outer layers of the bamboo splits towards the same direction. The device includes a scraping device, a sorting device and a clamping and conveying device which are arranged from front to back along an axis. The scraping device includes a conical cylinder, two pressing semi-rings, and a scraping ring. The sorting device includes an e-shaped sleeve composed of an inner cylinder and an outer cylinder, and two shifting forks located at both ends of the sleeve. The clamping and conveying device includes an inner ring moving on the axis, two clamping semi-rings and a conveying power device. The structure, function and technical parameters of each branch device are also introduced in detail.

Abstract: A method and special complex enzyme for hydrolyzing a galactomannan (GM) to prepare a small-molecule GM and a galactomannan oligosaccharide (GMOS) is provided. The method includes: conducting fermentation with microcrystalline cellulose (MCC) and melibiose as carbon sources and Trichoderma reesei (T. reesei) as an enzyme-producing strain to obtain a supernatant, which is a complex enzyme solution with enzymatic activities of ?-mannanase and ?-galactosidase; and directly using the complex enzyme solution for enzymatic hydrolysis of a GM as a substrate to prepare the small-molecule GM and the GMOS.

Abstract: An unit narrow board glue application device and method suitable for high-frequency hot pressing of solid wood edge glued panel is disclosed, including a transverse chain feeding device, a longitudinal roller feeding device and a gluing device. The transverse chain feeding device includes a fixed chain transport mechanism and a movable chain transport mechanism. The longitudinal roller feeding device includes the lifting power roller assembly, the longitudinal feed roller assembly and the pneumatic compression roller assemblies. The gluing device includes a glue pump, a glue application head, and a pneumatic slide table. The front end face of the hollow structure glue application head has a number of small round holes for glue liquid discharge and horizontal glue guiding grooves. The disclosure has a high degree of automation, can give full play to the efficiency of the high-frequency hot press, and is conducive to the intelligent manufacturing of solid wood furniture.

Abstract: An unit narrow board glue application device and method suitable for high-frequency hot pressing of solid wood edge glued panel is disclosed, including a transverse chain feeding device, a longitudinal roller feeding device and a gluing device. The transverse chain feeding device includes a fixed chain transport mechanism and a movable chain transport mechanism. The longitudinal roller feeding device includes the lifting power roller assembly, the longitudinal feed roller assembly and the pneumatic compression roller assemblies. The gluing device includes a glue pump, a glue application head, and a pneumatic slide table. The front end face of the hollow structure glue application head has a number of small round holes for glue liquid discharge and horizontal glue guiding grooves. The disclosure has a high degree of automation, can give full play to the efficiency of the high-frequency hot press, and is conducive to the intelligent manufacturing of solid wood furniture.

Abstract: Disclosed is a bamboo strip shaping method, which includes the following steps: S01: cutting a bamboo tube, and removing inner joints, outer joints and bamboo outer skin; S02: trisecting or quartering the bamboo tube in a longitudinal direction to obtain curved bamboo strips; S03: placing the curved bamboo strips in a bamboo strip shaping device for processing; S04: subjecting the curved bamboo strips to steam treatment and heating softening treatment; S05: pressing and shaping the curved bamboo strips to obtain flattened bamboo strips, and drying for a first time under a maintained pressure; S06: wetting bamboo outer skin surfaces and bamboo inner skin surfaces of the flattened bamboo strips, and drying for a second time; and S07: wetting the bamboo outer skin surfaces and the bamboo inner skin surfaces of the flattened bamboo strips, and drying for a third time.

Abstract: The invention discloses a strontium ferrite-based sacrificial mortar and its preparation method, the strontium ferrite-based sacrificial mortar mainly comprises 720-1000 parts of sulphoaluminate cement, 100-300 parts of strontium ferrite, 600-650 parts of quartz sand, 400-450 parts of water and 0.01-35 parts of superplasticizer. The preparation process is simple, and the strontium ferrite-based sacrificial mortar can be prepared by using a conventional forced single horizontal shaft concrete mixer. The obtained mortar has excellent working performance, compressive strength and corrosion resistance. It can be used in the current third and future fourth generation nuclear power plant core catchers, and has obvious engineering application value.

Abstract: A sacrificial concrete for a core catcher and a preparation method thereof are provided. The sacrificial concrete includes raw materials in parts by weight as follows: cement, 575˜625 parts; a quartz sand, 1200˜1300 parts; a hematite ore, 700˜800 parts; water, 200˜220 parts; a water reducing agent, 7˜10 parts; and strontium oxide, 0˜10 parts. The process of the preparation method is simple, and the sacrificial concrete with excellent performances of fluidity, strength and high-temperature resistance can be prepared by the known mixing technology. The sacrificial concrete can reduce releasing of radioactive substances 89Sr and 90Sr, so as to improve safety of nuclear power plants in case of a severe accident. Moreover, the sacrificial concrete can be used not only in a core catcher of current third generation nuclear power plant, but also in a core catcher of future fourth generation nuclear power plant, and has widespread engineering application value.

Abstract: Disclosed is a bamboo strip shaping method, which includes the following steps: S01: cutting a bamboo tube, and removing inner joints, outer joints and bamboo outer skin; S02: trisecting or quartering the bamboo tube in a longitudinal direction to obtain curved bamboo strips; S03: placing the curved bamboo strips in a bamboo strip shaping device for processing; S04: subjecting the curved bamboo strips to steam treatment and heating softening treatment; S05: pressing and shaping the curved bamboo strips to obtain flattened bamboo strips, and drying for a first time under a maintained pressure; S06: wetting bamboo outer skin surfaces and bamboo inner skin surfaces of the flattened bamboo strips, and drying for a second time; and S07: wetting the bamboo outer skin surfaces and the bamboo inner skin surfaces of the flattened bamboo strips, and drying for a third time.

Abstract: The present invention discloses an aramid-based epoxy resin and a method of making same, including the steps of reacting aramid fiber powder as a raw material with a metallization reagent; grafting a plurality of ethylene oxide, propylene oxide or a mixture thereof to an activated amide group of the aramid to introduce a reactive functional group hydroxyl; and then conducting a ring-opening and closing reaction by using epichlorohydrin to obtain a liquid aramid-based epoxy resin.