South China University of Technology

Sericulture and Agri-food Research Institute, Guangdong Academy of Agricultural Sciences

Weifeng Liu

Xueqing Qiu

Dongjie Yang

Hongming Lou

Yong Qian

Conghua Yi

Xinping Ouyang

Jinhao Huang

Yuxia Pang

Wenjuan Jiao

Yehui Zhang

Zhiqiang Fang

Yousheng Zhang

Tiantian Zhao

Ying Li

Shuai Chen

Zhixian Li

Dafeng Zheng

Fang Zhou

Huan Wang

Shiping Zhu

Yajun Chen

The present disclosure belongs to the technical field of health food, and in particular, relates to the use of PAYCS in the regulation of intestinal flora, metabolites, and brain neurotransmitters. PAYCS remedies scopolamine-induced memory impairment in mice through target oxidation, inflammatory stress and regulation of the intestinal microorganism-metabolite-brain neurotransmitter axis through PAYCS. PAYCS improves the memory pathway through the intestinal microorganism-metabolite-neurotransmitter axis. PAYCS can significantly reduce serum MDA and LDH levels and significantly increase liver SOD content. PAYCS-H inhibits the increase of liver TNF-α and IL-1β, while PAYCS-L can only reduce the content of TNF-α in the liver. Thus, PAYCS-L changes the ratio of/Firmicutes and increases the relative abundance of plants such as Cactaceae and Prevotellaceae, improving the neurotransmitters associated with the metabolism of tryptophan in the brain.

Use of PAYCS in regulation of intestinal flora, metabolites, and brain neurotransmitters

The present invention discloses a circulating multidimensional liquid chromatography and application thereof. The liquid chromatography comprises an infusion device, a sampling device, a collecting-resampling device, a chromatographic column switching device and a detecting device which are connected sequentially, wherein the collecting-resampling device comprises a collecting valve and a sample ring, and the collecting valve is connected with the sample ring; the sampling device is successively connected with the collecting valve and the chromatographic column switching device; the detecting device is also connected with the collecting valve; and the collecting valve is a three-slot three-position multi-way valve. The present invention adopts the three-slot three-position multi-way valve as the collecting valve, and the creative rotor flow path design can simultaneously satisfy the requirements of collection and resampling of the circulating multidimensional liquid chromatography, and greatly simplifies the hardware configuration.

Circulating multidimensional liquid chromatography and application thereof

The present invention belongs to the technical field of biomass carbon materials, and relates to a lignin porous carbon nanosheet, a preparation method therefor, and an application thereof in supercapacitor electrode materials. The method of the present invention performs layer-by-layer self-assembly of sulfonated lignin and oxalate in a selective solvent to prepare a layer-by-layer self-assembled lignin/oxalate composite, which is then carbonized and pickled to obtain the lignin porous carbon nanosheets. The lignin porous carbon nanosheets prepared by the above method of the present invention have a specific surface area of 200-1500 m/g, a micropore specific surface area of 100-500 m/g, a mesoporous specific surface area of 100-1000 m/g, a pore diameter of 0.5-30 nm, and a pore volume of 0.5-1.5 cm/g; they can be applied to supercapacitor electrode materials, showing higher specific capacitance and excellent rate performance (with a specific capacitance retention rate of 76.6%), having good potential application value.

Lignin porous carbon nanosheet, preparation method therefor, and application thereof in supercapacitor electrode materials

A lignosulfonate dispersion self-healing polyurea coating and a preparation method therefor. The coating is obtained by reacting the following components in parts by mass: 1-10 parts of microcapsules of a lignosulfonate-embedded healing agent; 10-100 parts a polyurea prepolymer; 20-120 parts of a mixed solution of an amino-terminated polyether and a sterically hindered amine chain extender. The preparation method for the coating comprises the steps of at room temperature, adding a mixed solution of microcapsules of a lignosulfonate-embedded healing agent, an amino-terminated polyether and a sterically hindered amine chain extender into a polyurea prepolymer and reacting same at room temperature for 10 min-4 h. The self-healing polyurea coating may be applied to the field of material surface protection, i.e., corrosion resistance of steel structures, especially marine steel structures.

Lignosulfonate dispersion self-healing polyurea coating, preparation method therefor, coating layer thereof and application thereof

A method for promoting enzymolysis of lignocellulose by using a pH-responsive lignin amphoteric surfactant and recovery of a cellulase. The method includes: adding lignocellulose to a buffer solution, and then adding a pH-responsive lignin amphoteric surfactant and a cellulase; controlling the pH of the mixed solution to be 4.0-6.2, heating the solution to a temperature of 40&#xb0; C. to 60&#xb0; C. and reacting at said temperature for 24-96 h to obtain a saccharified hydrolyzate of lignocellulose; and obtaining an enzymolysed liquid by solid-liquid separation, and then adjusting the pH of the enzymolysed liquid to precipitate the pH-responsive lignin amphoteric surfactant and the cellulase for recycling. The method can effectively improve the enzymolysis efficiency of lignocellulose, recover a certain amount of cellulase, and expand the applications of industrial lignin. The method does not require additional equipment, and is simple to operate and environmentally friendly.

Method for promoting enzymolysis of lignocellulose by using pH-responsive lignin amphoteric surfactant and recovery of cellulase

A three-dimensional lignin porous carbon/zinc oxide composite material and its preparation and application in the field of photocatalysis are disclosed. The method includes preparing a lignin/zinc oxide precursor composite by a hydrothermal method from a zinc salt, a weak alkali salt and an industrial lignin, and preparing a three-dimensional lignin porous carbon/zinc oxide composite material by high temperature calcination of the lignin/zinc oxide precursor composite. The composite material has a regular three-dimensional pore structure, with zinc oxide nanoparticles uniformly embedded among the three-dimensional lignin porous carbon nanosheets. Application of the composite material to the field of photocatalysis, especially as a photocatalyst for photocatalytic degradation of organic dye pollutants, can significantly improve the degradation efficiency and rate, and has potential application value in the field of photocatalytic degradation of organic pollutants.

Three-dimensional lignin porous carbon/zinc oxide composite material and its preparation and application in the field of photocatalysis

The present invention, belonging to the technical field of chemical sun-screening agent preparation, discloses a high-ultraviolet absorption lignin/chemical sun-screening agent microcapsule using lignin as a wall material and a preparation method therefor. The method of the present invention comprises the following steps: (1) dissolving 1-20 parts by weight of lignin in 100-200 parts by weight of an aqueous solution with a pH of 12, adjusting the pH of the solution to 7-10, and then removing insoluble substances by filtration to obtain a lignin solution; and (2) mixing 10-50 parts by weight of the lignin solution in step (1) with 1-10 parts by weight of a chemical sun-screening agent, and performing ultrasonic radiation under a power of 200-1500 W for 10 s to 25 min to obtain a lignin/chemical sun-screening agent microcapsule emulsion. The lignin/chemical sun-screening agent microcapsule of the present invention has excellent ultraviolet absorption performance, can avoid photodegradation of the chemical sun-screening agent, and has good stability; and it effectively prevents the chemical sun-screening agent from directly contacting and hurting the skin, having great application prospects in the field of sun-screening skincare products.

High-ultraviolet absorption lignin/chemical sun-screening agent microcapsule and preparation method therefor

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Guangzhou, China

Weifeng Liu