41 results about "Citronellal" patented technology

The invention relates to the technical field of fabrics, in particular to a long-acting anti-mosquito fabric and a preparation process thereof. The fabric overcomes the defect that an existing fabric is difficult to have efficient antibacterial and anti-mosquito performance and excellent washability at the same time. The method comprises the following steps: performing plasma treatment on a fabric to be treated, padding a sol system containing zinc acetate, silver nitrate and the like, and performing heat treatment; preparing a composite microcapsule containing chitosan, citronellal and the like, mixing the composite microcapsule with a bio-based cross-linking agent solution containing cyclodextrin and tannic acid to obtain a finishing liquid, dipping and rolling the primarily treated fabric in the finishing liquid twice, and performing ultraviolet curing and post-treatment to obtain the long-acting anti-mosquito fabric. The surface activity of the fabric is enhanced through plasma treatment, so that the nano coating is firmly attached; the composite microcapsule and the bio-based cross-linking agent solution cooperate to realize slow release and firm combination of mosquito-repelling components; multiple processes are matched to ensure that functional components are stable, and the fabric prepared by the process has efficient antibacterial and anti-mosquito performance and excellent washability, and can still maintain a good protection effect after being washed for multiple times.

The application provides an olefin bond reductase and a mutant thereof and application, and belongs to the technical field of catalysis and modification of functional enzyme molecules. The amino acid sequence of the olefin bond reductase disclosed by the application is shown as SEQ ID NO:1, and the amino acid sequence of the mutant thereof is shown as SEQ ID NO:3. The olefin bond reductase and the mutant thereof provided by the application are used in combination with glucose dehydrogenase to catalyze citral, without adding coenzyme NADH in a reaction system, while glucose salt is produced as a by-product, the economic benefit of the reaction is improved, the cost of the reaction is greatly reduced, and the olefin bond reductase and the mutant thereof have more potential and value in industrial production in the preparation of (R)-citronellal.

The application provides an island reef coral filler compaction pile and a construction method thereof. The construction method of the island reef coral filler compaction pile comprises the following steps: (1) using a weight to hammer the ground soil body to form a cylindrical hole; (2) first filling mixed sand and stone into the hole, the mixed sand and stone is composed of coral reef gravel and calcareous sand, then pouring a microbial curing liquid and a composite additive, the microbial curing liquid is composed of a composite bacterial liquid and seawater, the composite bacterial liquid is prepared from bacillus pasteurii, bacillus cereus and bacillus mucilaginosus, and the composite additive is composed of hydroxyl citronellal and eucalyptol; then using the weight to ram the filler; (3) repeating step (2) to ram and fill the pile hole to the ground to form the compaction pile. The construction method can significantly improve the quality of the compaction pile, significantly improve the single pile bearing capacity, and effectively reduce the relative usage amount of the microbial curing liquid.

The invention belongs to the technical field of organic synthesis, and particularly discloses a modified ChiraPhos type diphosphine ligand and a preparation method and application thereof.The modified ChiraPhos type diphosphine ligand is modified on the basis of a ChiraPhos ligand, naphthyl is introduced into the structure, the chiral recognition effect of a catalyst formed by the naphthyl and rhodium is better, and the catalytic activity of the catalyst is improved. A higher ee value can be induced to be generated in synthesis of an L-menthol key intermediate (R)-citronellal. The invention further provides a specific preparation method of the modified ChiraPhos type diphosphine ligand, and the modified ChiraPhos type diphosphine ligand is obtained from cheap and easily available raw materials through simple and convenient operation. The diphosphine ligand is used for a reaction for preparing (R)-citronellal through asymmetric hydrogenation of citral under rhodium catalysis, the (R)-citronellal with the ee value higher than that of a traditional rhodium catalysis system can be obtained through citral (E / Z = 90: 10) with cis-trans isomers mixed, and a certain foundation is laid for further reducing the industrial production cost of the (R)-citronellal.

Proposed is a perfume composition comprising or consisting of (a) nerolaldehyde; (b) geranial; (c) capraldehyde; (d) dodecanal; (e) citronellal; and optionally (f) at least one solvent, in particular as an orange oil substitute.

The invention discloses a pungent litse fruit essence for beverage and a preparation method thereof, and belongs to the technical field of beverage additives, the pungent litse fruit essence is prepared from the following raw materials in parts by mass: 0.1 part of citronellal, 0.1 part of linalool, 0.05 part of geraniol, 0.1 part of citral, 3 parts of lemon terpenoid removal liquid, 10 parts of pungent litse fruit water-soluble extract, 5 parts of pungent litse fruit fermentation extract, 61.65 parts of ethanol, 10 parts of purified water and 10 parts of propylene glycol. The citronellal, the linalool, the geraniol and the citral are used for providing head fragrance, the lemon terpene-removing liquid is used for providing soft fragrance, the pungent litse fruit water-soluble extract is used for providing main fragrance, the pungent litse fruit fermentation extract is used for providing composite fragrance, so that the fragrance of the pungent litse fruit essence is compounded and rich, and meanwhile, the pungent litse fruit extract is obtained by an ethanol water extraction method, has good water solubility, and can be used for preparing the pungent litse fruit essence. The beverage can be applied to beverages and has unique flavor.

The present invention relates to the technical field of antibacterial agents, and more particularly to a plant-flavored composite microbial sustained-release preparation, a preparation method, and an application thereof. The raw materials of the plant-flavored composite microbial sustained-release preparation include, by mass, 2-4 parts of clove oil, 6-10 parts of citronellal, 1 part of emulsifier, 2-4 parts of chitosan, 2-10 parts of sodium alginate, 2-6 parts of weathered coal humic acid, 2-6 parts of composite bacterial agent, 10-20 parts of biochar, 2-6 parts of amino-terminated polyamidoamine, and 0.0002-0.0008 parts of genipin. The present invention achieves a triple synergistic mechanism through the inhibition of bacteriostasis by composite bacterial agent, sustained release of plant active ingredients, and regulation of rhizosphere microecology, thereby breaking through the bottleneck of low prevention efficiency and short lasting effect of single biotechnology, significantly reducing the cost of chemical control, being suitable for organic pineapple planting systems, and having significant economic and ecological benefits.

The invention discloses a method for separating and preparing (R)-citronellal and co-producing (S)-citronellal, which takes raw materials containing (R)-citronellal and (S)-citronellal as substrates and carbonyl reductase and formate dehydrogenase as catalysts. According to the invention, co-production of (R)-citronellal and (S)-citronellal can be realized, and the (R)-citronellal and (S)-citronellal can be applied to the field of spices,

The invention relates to a composite biological preparation for aphid control and a preparation method thereof, and belongs to the technical field of biological control, the composite biological preparation comprises the following raw materials by weight: 10%-12% of tea saponin, 10%-13% of rotenone, 11%-14% of citronellal, 10%-15% of tea polyphenol, 12%-15% of castor extract, 10%-12% of white mustard seed oil, 3%-5% of garlic oil, 2%-4% of lauric aldehyde, 7%-9% of peppermint oil, and the balance of 95% alcohol. According to the preparation disclosed by the invention, through a multi-target synergistic effect, aphid mouthparts are out of order, action ability is lost, breeding is stopped and the symbiotic relationship of ants is blocked, so that omnibearing aphid prevention and control are realized, and the prevention and control efficiency reaches 90% or above.

The invention relates to the technical field of cucurbit bubble films, and discloses a multilayer biodegradable cucurbit bubble film and a preparation process thereof. The preparation process comprises the following steps: preparing a long alkyl chain type coupling agent by taking citronellal as a raw material; the long alkyl chain type connecting agent is a non-o-nitrobenzyl ester functionalized long alkyl chain type connecting agent or an o-nitrobenzyl ester functionalized long alkyl chain type connecting agent; based on an esterification reaction mechanism, the molecular structure of amylopectin is modified through a long alkyl chain type connecting agent to obtain alkenylated amylopectin; on the basis of a free radical coupling reaction mechanism, alkenyl amylopectin is bridged on a polyethylene molecular chain to prepare the biodegradable polyethylene material. The multilayer biodegradable cucurbit bubble film is prepared from a biodegradable polyethylene material and other auxiliaries through extrusion blow molding, casting blister and film layer compounding processes, the film product also has photodegradation capacity on the basis of excellent biodegradation capacity, the comprehensive performance can meet the actual use requirement, and the film product has actual application value.

The application relates to the technical field of daily chemicals, and particularly discloses a bacteriostatic and deodorizing fragrance composition as well as a preparation method and application thereof. The bacteriostatic and deodorizing fragrance composition is made of raw materials and comprises the following components: a chemical reaction type deodorizing fragrance base, a sensory modification and receptor blocking fragrance base and a bacteriostatic synergistic fragrance base. The chemical reaction type deodorizing fragrance base is a combination of one or more of citral, citronellal, decanal, damascone, ionone and methyl dihydrojasmonate; the sensory modification and receptor blocking fragrance base is a combination of one or more of menthol and its derivatives, linalyl acetate, dihydromyrcenol and eucalyptol; and the bacteriostatic synergistic fragrance base is a combination of one or more of farnesol, eugenol, thymol, tea tree oil and rosemary extract. The bacteriostatic and deodorizing fragrance composition can keep a better balance and coordination of the sensory modification, chemical deodorization and bacteriostatic components in the fragrance, and thus can exert excellent deodorization and bacteriostatic effects.

This invention discloses a method for preparing optically active citronellol, comprising the following steps: preparing optically active R-citronellol by asymmetric hydrogenation of neraldehyde and / or geranialdehyde in the presence of a catalyst, wherein the catalyst comprises a transition metal rhodium and a bisphosphine ligand, wherein the mass of isopentenol in the raw material neraldehyde or geranialdehyde is 100-500 ppm of the mass of neraldehyde or geranialdehyde, and the mass of 3,7-dimethyl-2,6-octadienoic acid is 500-1000 ppm of the mass of neraldehyde or geranialdehyde; the preparation method of this invention can significantly improve the catalytic stability of optically active transition metal catalysts used for homogeneous catalysis and asymmetric hydrogenation, yielding R-citronellol with high optical purity, while simplifying the process flow, avoiding the introduction of new impurities, and exhibiting significant economic benefits.

The application provides a method and a process system for continuously producing citronellal from citral. The method comprises the following steps: introducing hydrogen into citral to produce citronellal under the catalysis of a catalyst; wherein the hydrogen introduced in the hydrogenation reaction contains 100-600 ppm of activating gas; and the activating gas is selected from NO or NO2. The method and device for continuously producing citronellal from citral provided by the application overcome the shortcoming that noble metal catalysts in aldehyde systems are easily poisoned by CO generated by aldehyde decomposition, realize online activation of the catalyst, and realize circulation and reuse of the catalyst in the reactor.

The application provides a method for efficiently preparing R-citronellal from citral. The method comprises two steps of pretreating raw material citral and catalytically preparing R-citronellal through asymmetric hydrogenation of citral. The method can greatly improve S / C (substrate / catalyst) of the reaction of preparing R-citronellal through asymmetric hydrogenation of citral, thereby significantly improving production efficiency and economic benefits.

The invention discloses olefinic bond reductase and application thereof. The amino acid sequence of the olefinic bond reductase mutant disclosed by the invention is as shown in SEQ ID NO: 4. The olefinic bond reductase mutant provided by the invention has preference to nerolaldehyde, and a double-plasmid co-transformation strain constructed by the olefinic bond reductase mutant and glucose dehydrogenase not only has more preference to a nerolaldehyde substrate, but also can transform the substrate (E / Z)-citral into (R)-citronellal with higher transformation efficiency; and the method has good potential economic benefits and industrial application values.

This invention relates to the field of polymer materials technology, and discloses a light-triggered sustained-release polyamide masterbatch for antibacterial and mosquito-repellent traditional Chinese medicine, its preparation method, and applications. The masterbatch comprises a polyamide matrix and traditional Chinese medicine composite microcapsules and hindered amine light stabilizers uniformly dispersed in the polyamide matrix. The traditional Chinese medicine composite microcapsules are core-shell structures, with the core containing Artemisia argyi oil, citronellal, and eugenol, and the capsule wall being a polyamide material. The hindered amine light stabilizers are uniformly distributed in the polyamide matrix and / or capsule wall. This invention utilizes the photosensitivity of the light stabilizer to achieve on-demand release of traditional Chinese medicine components under ultraviolet light irradiation. Simultaneously, specific HALS (Hindered Amines and Hindered Amines) have a synergistic antibacterial effect with the traditional Chinese medicine components, resulting in a long-lasting, efficient, and safe antibacterial and mosquito-repellent effect. It is suitable for various applications such as fibers, non-woven fabrics, films, and injection molded parts. Using natural traditional Chinese medicine extracts as the main active ingredients, it is more environmentally friendly and has higher safety for humans and the environment.

The present invention provides a radioactive isotope carbon-14 labeled methoprene and its preparation method, including the steps: S1: Prepare [cyano-<supgt;14< / supgt;C](R)-7-methoxy-3,7-dimethyloctanenitrile; S2: Prepare [aldehyde group-<supgt;14< / supgt;C]citronellal; S3: Prepare carbon-14 labeled methoprene. It fills the blank in the related field of radioactive isotope carbon-14 labeled methoprene, enabling it to provide accurate and reliable tracer information when studying the behavior of methoprene in organisms and the environment, and providing a powerful tool for in-depth exploration of the metabolic process, environmental behavior, pharmacokinetics, etc. of methoprene, which helps to promote the development of related field research, such as optimizing the use strategy of methoprene in agricultural pest control, etc.

The invention discloses an olefinic bond reductase mutant, nucleic acid for coding the olefinic bond reductase mutant, a vector containing the nucleic acid, a recombinant cell and application of the olefinic bond reductase mutant in preparation of (R)-citronellal. The olefinic bond reductase mutant contains mutations A146P and V282D relative to an amino acid fragment as shown in SEQ ID NO: 1 contained in wild type olefinic bond reductase. The olefinic bond reductase mutant and glucose dehydrogenase are utilized to construct a coenzyme circulation system, the high-optical-purity (R)-citronellal is formed through double-enzyme-stage combination, the ee value can reach 98% or above and is far higher than 63.5% of a wild type of the olefinic bond reductase mutant, the citral conversion rate can reach 98% or above, the concentration of the corresponding product (R)-citronellal can reach about 37 g / L or higher, and the yield of the (R)-citronellal is higher than that of the wild type of the olefinic bond reductase mutant. A potential engineering strain is provided for subsequently realizing large-scale preparation of high-optical-purity (R)-citronellal by a catalytic method.

The invention provides a qualitative detection method and application of honey ointment for treating rash. The detection method comprises the following steps: identifying gallic acid, ellagic acid, sennoside A and sennoside B in the honey paste by utilizing a high performance liquid chromatography, and / or identifying the artemisia argyi in the honey paste by utilizing a thin layer chromatography. The method can solve the problem that in the prior art, a qualitative detection method for the Etil filisummer hot honey paste is lacked, and is suitable for the field of qualitative detection of drugs.

Provided herein is a composition comprising antimicrobial peptide having sequence of SEQ ID 1 and a natural active such that the composition provides 5 log reduction of bacteria in 1 minute. In the said composition the natural active is selected from medium chain fatty acid (6 to 12 carbon atoms) and selective essential oil like eugenol and citronellal from clove oil and citronella oil respectively.

This invention relates to the field of functional textile technology, and discloses a method for preparing a light-triggered, sustained-release traditional Chinese medicine antibacterial and mosquito-repellent outdoor textile for outdoor environments, as well as the resulting product. The preparation method involves: providing a light-triggered, sustained-release traditional Chinese medicine antibacterial and mosquito-repellent polyamide masterbatch, which consists of a polyamide matrix, uniformly dispersed traditional Chinese medicine composite microcapsules, and hindered amine light stabilizers. The core of the microcapsules contains Artemisia argyi oil, citronellal, and eugenol. The masterbatch is blended with the polyamide matrix, spun, and woven to obtain a grey fabric. The grey fabric is then subjected to ultraviolet light activation treatment to form an initial antibacterial and mosquito-repellent active layer. Finally, the outdoor textile is obtained through finishing. This invention utilizes the photosensitivity of hindered amine light stabilizers to achieve on-demand release triggered by ultraviolet light. The resulting textile exhibits antibacterial and mosquito-repellent effects, retaining ≥80% of its function after 20 washes. It is suitable for outdoor products such as tents, outdoor clothing, and sleeping bags, and has outstanding advantages such as long-lasting effectiveness, environmental safety, and ease of use.

The invention belongs to the technical field of daily necessities, and provides a solid mosquito repellent product and a preparation method thereof. The solid mosquito repellent product comprises an essence base, a curing agent, an anti-cracking agent, a thickening agent, an emulsifying agent and a preservative, and the specific types and mass parts of all the components are limited. According to the invention, an essence base compounded by 2-undecanone and citronellal is adopted, and a sodium stearate-beeswax composite curing agent system and a carrageenan-xanthan gum double-thickening system are combined in a golden proportion, so that the volatilization rate is accurately regulated and controlled, and the mosquito repelling duration is as long as 15-60 days; through the synergistic effect of the emulsifier Tween 80 and the anti-cracking agent, nanoscale slow-release particles are formed, and uniform diffusion of mosquito-repelling components is ensured; an essence base compounded by citronellal, citronellol and peppermint oil can cover the slight grease flavor of 2-undecanone; the mosquito repelling effect is remarkable, the repelling rate of aedes albopictus reaches 98.2%, and the mosquito repellent is non-toxic, safe, pleasant in smell and free of skin irritation.

The invention provides a geraniol / nerol composition and a method for isomerizing linalool from the geraniol / nerol composition, geraniol and / or nerol are isomerized into linalool in a continuous or semi-continuous manner in a reactor containing a catalyst, and the content of key components of citronellol and citronellal in a raw material is reduced, so that the content of linalool and the content of key components of citronellal are reduced. The content of geraniol is increased, and linalool with the content greater than 99% can be obtained. The problem that the catalyst is easy to inactivate is solved by adding a small amount of auxiliaries into the system, the service life of the catalyst is prolonged, and efficient utilization of raw materials is realized.

The present invention provides a method for utilizing pure essential oils from citronella to formulate mosquito repellent spray. Citronella contains citronellal, citronellol, and geraniol, that provide its aroma and mosquito-repellent ability. The method involved washing the citronella grass to remove impurities. Air dying extracting the raw materials at room temperature to remove moisture. The leaves are then subjected to leaching processes in which they are soaked in 500 mL of hexane overnight to ensure efficient and pure essential oil extraction. Recover the hexane through distillation using a Soxhlet apparatus, leaving behind the pure essential oil to achieve a natural, eco-friendly, cost-effective and sustainable mosquito-repellent spray.

The invention provides a method for preparing citronellal with optical activity, which is characterized in that a nitrogen-doped carbon material is used as a catalyst, a bicyclo-oxazole compound is used as a cocatalyst, citral is used as a raw material, and asymmetric hydrogenation reaction is carried out to prepare the citronellal with optical activity. The method provided by the invention realizes asymmetric hydrogenation of alpha, beta-unsaturated aldehyde under the condition of higher substrate / catalyst, and the optical purity of the asymmetric hydrogenation product can reach about 85-99ee%; the chemical selectivity of the asymmetric hydrogenation product can reach 95-99%, and the conversion rate can reach 85-99.9%.

The invention relates to an oligonucleotide chimera with a structure shown in a formula II or a pharmaceutically acceptable salt thereof, and a leech repelling composition formed by the oligonucleotide chimera and any one or a combination of the oligonucleotide chimera and the pharmaceutically acceptable salt with icaridin, citronellal and decyl dimethyl ammonium chloride. The leech repelling composition has the advantages of good leech repelling effect, good stability, few side effects and the like.

The invention belongs to the technical field of biosynthesis, and particularly relates to a method for catalytically synthesizing R-citronellal based on a double-enzyme system. According to the method for catalytically synthesizing the R-citronellal through the double-enzyme system, one-step series conversion from geraniol to the R-citronellal can be realized through the synergistic effect of the double-enzyme system of the copper oxidase and the old yellow enzyme, especially by matching with a proper coenzyme system and a metal salt system, so that the reaction efficiency and the enantioselectivity of a product are greatly improved, and the yield of the R-citronellal is increased. The method is a high-efficiency and high-selectivity synthesis system for synthesizing R-citronellal under the catalysis of a double-enzyme system.

The invention is a composition for the treatment of HPV infections, which, with its components containing [3-caryophyllene, geranyl acetate, geraniol, and nerol, modulates the E7 and E2 protein pathways to provide a natural supportive therapeutic effect in managing HPV infections, exhibits antiviral, antibacterial, and immunomodulatory activity, significantly reduces viral replication, and suppresses protein expression, Contains Eugenia aromaticum (clove oil), which prevents viral replication by disrupting the structural integrity of cell membranes, exhibiting antimicrobial and antiviral activity with its high eugenol content, and Contains Cymbopogon martinii (palmarosa oil), which disrupts viral cell walls and inhibits the replication process, exhibiting antiviral and antibacterial properties with its high geraniol and citronellal content, and Contains Melaleuca viridiflora (niaouli oil), which strengthens cellular immune mechanisms to limit the intracellular spread of viruses and exhibits antiviral and immunomodulatory effects with its viridiflorol content.

The invention discloses a hygienic product packaging bag with an anti-mosquito function, and belongs to the field of hygienic product packaging bags, the hygienic product packaging bag comprises a bag body, an anti-mosquito functional layer is arranged on the bag body, anti-mosquito particles are arranged in the anti-mosquito functional layer, and the anti-mosquito particles are formed by embedding and loading anti-mosquito active ingredients in a sustained-release material. The slow-release material comprises beta-cyclodextrin, chitosan, glycerol and deionized water, the anti-mosquito active component comprises citronellal, lemon cineole, eugenol, menthol, a folium artemisiae argyi extract, toosendanin and a cosolvent, and the anti-mosquito component adopts multiple plant essential oils or plant extracts. The mosquito-repellent incense can protect mosquitoes from the smell, nervous system, feeling, ingestion, breeding interference and other aspects, the protection effect is guaranteed, the components are all plant essential oil or plant extracts, components uncomfortable to the human body do not exist, products such as private parts, babies and pregnant women can be conveniently packaged and used, and the mosquito-repellent incense is convenient to use. And the arrangement mode that particles are formed through embedding or loading and added to the packaging layer is adopted, so that lasting and comprehensive packaging protection can be ensured.

The invention discloses a carbonyl reductase mutant and application of the carbonyl reductase mutant in preparation of (R)-citronellal. The application comprises the following steps: in a reaction system in the presence of a cosolvent, formate and a cofactor NAD < + >, carrying out catalytic reaction by taking recombinant cells for expressing a carbonyl reductase mutant and formate dehydrogenase as catalysts and (S)-citronellal as a substrate to generate (S)-citronellal, and preparing a reaction solution containing (R)-citronellal and (S)-citronellal; the mutant of the carbonyl reductase comprises an amino acid fragment of which the amino acid sequence is shown as SEQ ID NO: 3. The co-production of the (R)-citronellal and the (S)-citronellal is realized, and the e.e. Value of the obtained (R)-citronellal is greater than 99%.