10 results about "P-methoxybenzaldehyde" patented technology

The invention discloses a phagostimulant capable of improving the prevention and control effect of cotton flower thrips and application of the phagostimulant. The phagostimulant is prepared from the following components in parts by weight: 10 to 30 parts of p-methoxycinnamyl aldehyde, 5 to 40 parts of anisaldehyde, 40 to 70 parts of ethyl nicotinate and 10 parts of a cosolvent. The phagostimulant is prepared from the following components in parts by weight: 10 to 30 parts of p-methoxycinnamyl aldehyde, 5 to 40 parts of anisaldehyde, 40 to 70 parts of ethyl nicotinate and 10 parts of cosolvent. By utilizing the tropism of the cotton flower thrips to specific volatile compounds and through the synergistic effect of the three plant source compounds, pests hidden in stamens, petal wrinkles, leaf backs and other hidden parts are attracted to a pesticide application area, the contact area of insect bodies and the pesticide is remarkably increased, and therefore the prevention and control effect is improved. Field tests show that when an optimal formula (the ratio of p-methoxycinnamaldehyde to anisaldehyde to ethyl nicotinate to the cosolvent is 20: 20: 50: 10) is matched with spinetoram for use, the control effect can reach 84.43%-92.22%, the control effect is remarkably improved compared with that of single use of an insecticide, and a good control effect is shown. The method is safe and environment-friendly, reduces the amount and increases the efficiency, and has remarkable economic and ecological benefits.

The invention relates to the technical field of bioengineering bacteria. The invention provides a saccharomyces cerevisiae engineering bacterium capable of synthesizing p-anisaldehyde from the beginning and a construction method of the engineering bacterium. A saccharomyces cerevisiae recombinant strain JS1-15 is used as an original strain; the saccharomyces cerevisiae engineering bacteria are obtained by heterologous expression of 4-hydroxymandelic acid synthetase HmaS, heme oxygenase HMO, benzoyl formate decarboxylase BFD and methyltransferase 4VPMT1. The saccharomyces cerevisiae engineering bacteria are used for preparing the saccharomyces cerevisiae engineering bacteria. The saccharomyces cerevisiae engineering bacterium disclosed by the invention can realize a complete de novo biosynthesis path from 4-hydroxyphenylpyruvic acid to p-anisaldehyde by taking glucose as a unique carbon source, and has good industrial application potential.

This invention provides an electrochemical synthesis method for anisaldehyde. The method uses a carbon paste modified with a polyethersulfone framework containing embedded acidic groups as the electrode material. Under the action of an electrolyte salt, anisaldehyde is prepared by electrochemical oxidation of 4-methylanisole in the anolyte chamber and by electrochemical reduction to generate hydrogen in the cathode chamber. This method enhances the thermal stability, chemical stability, and conductivity of the electrodes, enabling continuous and stable operation of the electrolysis device for over 3000 hours. Furthermore, it achieves the conversion of anisaldehyde in one step, reducing the need for acetal hydrolysis.

This invention discloses a thin-layer chromatography (TLC) identification method for five medicinal herbs in Lingqiao Jiedu Pills, belonging to the field of traditional Chinese medicine quality control technology. This invention uses only one sample. First, an ethyl acetate extract is obtained through volatile oil extraction. Petroleum ether (30-60℃)-ethyl acetate is used as the developing solvent, and anisaldehyde-sulfuric acid-ethanol solution is used for color development, simultaneously identifying Schizonepeta tenuifolia and Mentha haplocalyx. Then, the aqueous solution after volatile oil extraction is centrifuged, extracted with ethyl acetate, evaporated to dryness, and dissolved in methanol. Using chloroform-methanol-glacial acetic acid, ethyl acetate-formic acid-glacial acetic acid-water, and dichloromethane-diethyl ether-methanol-n-hexane systems as developing solvents, Forsythia suspensa, Glycyrrhiza uralensis, and Arctium lappa are identified sequentially. This method is simple, rapid, and efficient, producing clear spots without tailing or cross-interference. It exhibits good specificity and reproducibility, making it suitable for the quality control of Lingqiao Jiedu Pills.

The application provides an anisaldehyde hippuric acid molecular top and a preparation method and application thereof, and belongs to the technical field of detection of gibberellic acid liquid preparation. The anisaldehyde hippuric acid molecular top has a unique configuration of a rigid aromatic ring rotor and an amide bond flexible support shaft, can convert micro-viscosity changes into visual light signal output, and releases light signal intensity that regularly increases with the increase of micro-viscosity, so that the dilution degree of the gibberellic acid liquid preparation can be observed in real time and accurately controlled. The sensitive coefficient of the MBABG to viscosity is high (x=0.65), the conjugated system formed by the amide bond and the aromatic ring in the molecular structure of the MBABG gives the MBABG excellent chemical stability, the MBABG can resist the complex environment of multiple components such as thickening agents, surfactants and pH regulators in the gibberellic acid liquid preparation, and can exist stably for a long time.

This invention discloses a method for the selective oxidation of benzyl C-H bonds to anisaldehyde induced by oxygen vacancy in an aqueous electrocatalytic system. In the electrochemical reaction system, a transition metal oxide containing oxygen vacancies is used as the anode. Under an applied electric field, methyl aromatic compounds undergo an electrochemical oxidation reaction to generate anisaldehyde. By introducing a controllable oxygen vacancy structure into the cobalt-based metal oxide, the electrophilicity of oxygen species on the catalyst surface and the active oxygen supply capacity are significantly improved, enabling the selective oxidation of benzyl C-H bonds to be produced under aqueous electrolysis conditions. 3 The efficient and selective activation and oxidation of the H-H bond leads to the highly selective generation of anisaldehyde products in aqueous electrolytes and inhibits the deep oxidation of methyl aromatic compounds to carboxylic acids.

The application belongs to the technical field of fine chemical synthesis and natural product deep processing, and particularly discloses a method for efficiently separating high-purity sodium anisate from crude sodium anisate, which comprises the following steps: performing GC-MS substance identification on the crude sodium anisate solution, and confirming that the key impurity components are anisaldehyde, 1-(4-methoxyphenyl)-1,2-propanediol and isomers thereof; adding sodium hydroxide into the sodium anisate solution, and introducing micro-nano ozone to deeply oxidize the impurities, so as to obtain a low-viscosity sodium anisate solution; adding an acid into the solution to neutralize and precipitate anisic acid solid, centrifugally separating the anisic acid solid, and then performing a neutralization reaction with a sodium hydroxide solution to generate sodium anisate and water, so as to obtain a high-purity sodium anisate product through cooling crystallization, centrifugal separation and drying. The purity of the obtained sodium anisate product is greater than or equal to 99.5%, there is no solvent residue risk in the whole process, the product reaches the high-purity and solvent-residue-free requirements of high-end cosmetic raw materials, the product yield is high, and the economic benefits are remarkable.

The present application concerns a process for determining the total saponin content of a sample, which includes at least the following steps:(1) carrying out a reaction, by adding to said sample, which is dissolved in at least one solvent, p-anisaldehyde and sulfuric acid, where the sulfuric acid is present in an amount of from 40% to 55% of the reaction mixture,(2) heating the reaction mixture to a temperature of from 45°C to 75°C,(3) measuring the absorbance of the solution of the obtained chromophore at a wavelength of from 580 nm to 610 nm,(4) producing a series of standard saponin solutions, under the reaction conditions of steps (1) and (2), whose absorbances, following the reaction with a chromogen, are obtained at the wavelength defined in step (3),(5) quantifying the content of the sample in saponins,by comparing the absorbance of the chromophore solution measured in step (3) to the series of absorbances of the standard solutions created in step (4). It also relates to a process for determining the content of steroidal saponins, using an absorbance measurement at 425 nm. The present application is intended in particular for the sectors of the agri-food industry, pharmaceuticals and cosmetics, in particular for the human and animal nutrition industry.,

The invention discloses a malt thin layer identification method, and relates to the technical field of traditional Chinese medicine detection. The detection method comprises the following steps: taking a malt reference medicinal material, mixing the malt reference medicinal material with an extraction solvent, performing ultrasonic treatment, filtering, evaporating filtrate to dryness, and redissolving to obtain a malt reference medicinal material solution; preparing a malt negative sample, mixing the malt negative sample with an extraction solvent, performing ultrasonic treatment, filtering, evaporating filtrate to dryness, and redissolving to obtain a malt negative control solution; the method comprises the following steps: taking a test product digestion-promoting tablet, mixing with an extraction solvent, carrying out ultrasonic treatment, filtering, evaporating filtrate to dryness, and redissolving to obtain a digestion-promoting tablet test product solution; sucking 10-15 microliters of the negative control solution, 10-15 microliters of the malt control medicinal material solution and 10-15 microliters of the test sample digestion-promoting tablet solution, respectively dripping the solutions on the same thin-layer plate, developing by using ethyl acetate-methanol-water as a developing solvent, taking out, spraying an anisaldehyde-sulfuric acid solution, heating at 100-110 DEG C until the color of spots is clear, and inspecting under a fluorescent lamp. The detection method disclosed by the invention is good in specificity, good in durability and high in stability.

The invention relates to an environment-friendly cyanide-free electroplating solution and an electroplating process thereof. Comprising the following components in parts by mass: 55 g / L to 130 g / L of copper sulfate, 10 g / L to 20 g / L of copper chloride, 14 g / L to 34 g / L of copper pyrophosphate, 15 g / L to 25 g / L of sodium chloride, 20 g / L to 40 g / L of potassium ethylene diamine tetraacetate, 0.01 g / L to 0.02 g / L of sodium citrate, 12 g / L to 22 g / L of sodium hydroxyethylidene diphosphonate, 8 g / L to 12 g / L of diethylenetriamine, 6 g / L to 10 g / L of potassium sulfite, 4 g / L to 8 g / L of methyl pentynol, 10 g / L to 20 g / L of ammonium acetate, 9 g / L to 17 g / L of anisaldehyde, 7 g / L to 15 g / L of sodium nitrate, 8 g / L to 16 0.1 g / L to 0.3 g / L of a brightening agent, 2 g / L to 4 g / L of a dispersing agent, 0.05 g / L to 0.1 g / L of a hardness conditioning agent and 2 g / L to 5 g / L of a surface active agent. According to the environment-friendly cyanide-free electroplating solution, the influence on the environment is greatly reduced in the production process, and workers can be prevented from being poisoned by cyanide.