8 results about "Phenethylamine" patented technology

The invention discloses preparation and application of a reductive amination catalyst. The preparation method of the catalyst comprises the following steps: step 1, preparing an SrTiO3 carrier; step 2, loading a nickel source into the prepared SrTiO3 carrier to form a nickel-loaded SrTiO3 catalyst precursor; and step 3, roasting the SrTiO3 catalyst precursor to obtain the SrTiO3 loaded nickel catalyst. Large-scale production of the non-noble metal catalyst is realized by adopting a co-precipitation method and an impregnation method which are simple in process and environment-friendly under the condition of room temperature, the obtained material can be used for reductive amination reaction of acetophenone under the condition of taking water as a solvent and shows excellent catalytic performance, and after 50 times of application, the acetophenone conversion rate is gt; the selectivity of alpha-phenylethylamine is gt; the selectivity of the alpha-phenethyl alcohol is 1t; and 2%.

This invention relates to a recombinant bacterial cell for de novo synthesis of xanthocyanin WGX-50 using glucose as a carbon source, its construction method, and its applications. The recombinant bacterial cell uses *Escherichia coli* as the host strain and integrates the following three heterologous biosynthetic modules: a 3,4-dimethoxyphenylethylamine de novo synthesis module, which contains an enzyme system catalyzing the generation of dopamine from L-tyrosine and further stepwise methylation of dopamine to 3,4-dimethoxyphenylethylamine; a cinnamoyl-CoA synthesis module, which contains an enzyme system catalyzing the generation of cinnamoyl-CoA from phenylalanine or glucose metabolic intermediates; and an amidation module, which contains an acyltransferase capable of catalyzing the condensation of 3,4-dimethoxyphenylethylamine and cinnamoyl-CoA to generate xanthocyanin WGX-50. This invention achieves, for the first time, the de novo biosynthesis of xanthocyanin in microorganisms, completely eliminating dependence on the expensive exogenous precursor 3,4-dimethoxyphenylethylamine and significantly reducing raw material costs.

The utility model discloses a foam removal device for phenylethylamine production, and relates to the technical field of phenylethylamine production equipment, the foam removal device comprises a reaction kettle, a motor, a rotating shaft, stirring blades, a rotating plate and a fixed plate, the bottom of the reaction kettle is provided with supporting legs, the top of the reaction kettle is provided with a feed port, and the bottom of the reaction kettle is provided with a discharge port; the motor is fixedly arranged in the center of the top of the reaction kettle, the rotating shaft is vertically arranged in the reaction kettle, the upper end of the rotating shaft rotationally penetrates through the top of the reaction kettle and is connected with the output end of the motor, the lower end of the rotating shaft is rotationally connected with the center of the bottom of the reaction kettle, and the stirring blades are arranged on the rotating shaft and are lower than the liquid level; the rotating shaft is adopted to drive the rotating plate and the first crushing rod at the bottom of the rotating plate to rotate, and the second crushing rod on the fixed plate between the rotating shaft and the side wall of the reaction kettle is matched to impact and crush foams on the liquid surface, so that the foams are eliminated, the situation that the foams adhere to the wall is reduced, the safety problem caused by the foams is avoided, and the product yield is improved.

The application discloses a quasi-two-dimensional red light perovskite LED device and a preparation method thereof, and belongs to the technical field of light emitting diodes, wherein the preparation method comprises the following steps: depositing a PEDOT:PSS aqueous solution on a substrate surface by a spin coating method, and performing a first annealing treatment; mixing TFB and PVK in a chlorobenzene solution, and depositing the mixture on the substrate surface after the first annealing treatment by a spin coating method, and performing a second annealing treatment; depositing a calcium lignosulfonate solution on the substrate surface after the second annealing treatment by a spin coating method; dissolving lead iodide, cesium iodide, zinc iodide, 3,3-diphenylpropylamine iodine, 1-naphthalene methylamine iodine and phenylethylamine iodine in an N,N-dimethylformamide solution to obtain a perovskite precursor solution; dropping the perovskite precursor solution on the substrate surface after the above treatment to prepare a thin film, and performing a third annealing treatment on the thin film; and evaporating an electron transport layer and a cathode electrode on the thin film to obtain the quasi-two-dimensional red light perovskite LED device. The quasi-two-dimensional red light perovskite LED device has a small turn-on voltage, high brightness and high external quantum efficiency.

This invention discloses a two-dimensional and three-dimensional perovskite heterojunction optical thin film, belonging to the field of perovskite optical thin film technology. The thin film comprises a ternary cationic three-dimensional perovskite substrate, a composite two-dimensional perovskite passivation layer, and functional additives. The three-dimensional substrate has a chemical composition of FA. 0.7‑0.9 Cs 0.1‑0.2 Rb 0.05‑0.1 Pb(I 1‑x Br x The two-dimensional passivation layer (x = 0~0.5) is a mixture of phenylethylamine lead iodine and its monofluorinated derivatives, and the functional additive is a composite of CsPbBr₃ quantum dots and thiourea. The thin film is prepared by solution spin coating. This invention significantly improves the structural order, carrier mobility, and stability of heterojunctions through multi-element synergy, composite passivation, and additive assistance, and can be widely used in optoelectronic devices such as solar cells, lasers, photoelectric sensors, and light-emitting diodes.

This invention discloses a strain of *Lactobacillus sarcodactylis* with stable biogenic amine degradation ability and its applications, belonging to the field of microbial fermentation technology. This invention screened a strain of *Lactobacillus sarcodactylis* L18 from fermented soybean paste, capable of degrading biogenic amines. This strain can simultaneously degrade eight common biogenic amines: tryptamine, phenylethylamine, putrescine, cadaverine, histamine, tyramine, spermidine, and spermine. The *Lactobacillus sarcodactylis* L18 screened in this invention exhibits rapid growth, strong environmental adaptability, and stable amine-reducing performance. It can continuously exert its biogenic amine degradation effect under low to medium-high salt, acidic to weakly alkaline conditions, and common fermentation temperature conditions, making it particularly suitable for the effective control of biogenic amines such as tyramine in fermented foods.

The invention discloses low-temperature conductive silver paste and a preparation method thereof, and relates to the technical field of conductive silver paste. According to the preparation method, the two-dimensional silver nanosheets are taken as a main body, the one-dimensional carbon nanotubes are overlapped and interspersed on the surfaces and in gaps of the two-dimensional silver nanosheets through an evaporation self-assembly technology to form a silver nanosheet reinforcement body, and the carbon nanotubes have higher conductivity and can fill the gaps of the silver nanosheets, so that the effect of improving the conductivity of the silver paste is achieved; then, the silver nanosheet reinforcement and silver nanoparticles are compounded to form a composite conductive filler, 3, 4-dimethoxyphenylethylamine is used for surface modification of the composite conductive filler, amino groups on 3, 4-dimethoxyphenylethylamine molecules can be adsorbed on the surface of the composite conductive filler through coordination, and the surface of the composite conductive filler is modified; due to the existence of benzene rings and methoxyl, the steric hindrance among the fillers is increased, the dispersion stability is effectively improved, and meanwhile, the conductivity of the conductive silver paste is further enhanced due to the enhancement of the uniformity of a conductive network. The conductive silver paste prepared by the invention has the effects of high conductivity and stability.

The application discloses a low-temperature conductive silver paste and a preparation method thereof, and relates to the technical field of conductive silver paste.The application takes two-dimensional silver nanosheets as a main body, and makes one-dimensional carbon nanotubes overlap and interpenetrate in the surface and gaps of the two-dimensional silver nanosheets through an evaporation self-assembly technology to form a silver nanosheet reinforcer.The carbon nanotubes have higher conductivity, can fill the gaps of the silver nanosheets, and can improve the conductivity of the silver paste; subsequently, the silver nanosheet reinforcer is compounded with silver nanoparticles to form a composite conductive filler, and the composite conductive filler is surface-modified by using 3,4-dimethoxyphenethylamine.The amino group on the 3,4-dimethoxyphenethylamine molecule can be adsorbed on the surface of the composite conductive filler through coordination, and the existence of benzene rings and methoxy groups increases the steric hindrance between the fillers, effectively improves the dispersion stability, and simultaneously, the strengthening of the uniformity of the conductive network further enhances the conductive performance of the conductive silver paste.The conductive silver paste prepared by the application has the effects of high conductivity and stability.