95results about How to "Increase hair permeability" patented technology

The invention discloses an extraction method of cactus polysaccharide, which is characterized by comprising the following steps: high temperature enzyme inactivation; drying and crushing; extraction, centrifugal separation and filtration; filtrate concentration, adding into alcohol, precipitation, and crude cactus polysaccharide collection; dissolving of the crude cactus polysaccharide and purification; and obtaining of the cactus polysaccharide after collecting, washing and vacuum drying the precipitation. The cactus polysaccharide is applied to tobacco threads along with feed liquid after being dissolved with water, therefore, the smoke has no peculiar smell when a person smokes, the cactus polysaccharide can improve quality of aroma, mellow degree and sweet taste, improve oral comfort, reduce unpleasant smell and irritation, improve the dry sensation to a certain degree and obviously improve the moisturizing performance. The cactus polysaccharide does not change the original properties and the original processing technology of cigarettes, and does not change or influence the smoking quality of the cigarettes, thus having practical production significance and value.

The invention discloses a preparation method of a high-nicotine tobacco extract. The preparation method of the high-nicotine tobacco extract belongs to the field of tobacco additives, and mainly comprises three steps of raw material pretreatment, subcritical extraction and molecular distillation. A baking process is adopted for pretreating tobacco leaves, so that reducing sugar of tobacco and a nitrogen-containing compound are promoted to generate maillard reaction, substances such as pyrone and furanone are produced, the baking aroma is improved, the reducing sugar content is reduced, the suction offensive odor is reduced, meanwhile, combined-state nicotine in the tobacco leaves is converted into a free state, and the content of the free-state nicotine is improved. A weak polar solvent is adopted for subcritical extraction, so that the extraction rate of tobacco feature aroma substances and the free-state nicotine can be improved; and low-temperature molecular distillation is combined, so that low-boiling-point aroma substances and the nicotine can be effectively enriched, the damage on thermosensitive substances due to high temperature is avoided, and meanwhile, the content of macromolecular substances such as pectin and protein in an extract is reduced. The method is simple in preparation process, simple and convenient to operate, and suitable for industrial production and application.

The invention provides a method for preparing tobacco extract by utilizing waste and inferior tobacco leaves. The tobacco extract is prepared through the following steps: mixing tobacco powder, tobacco leaf fragments and tobacco stems in a cigarette manufacturing department and adding the mixture into an ethanol solution for extracting; decompressing and concentrating; then adding pure water and glucose in sequence; after uniformly stirring, adding cellulase and subtilisin in sequence to carry out enzymolysis; then adding the mixture subject to enzymolysis into the ethanol solution and standing; filtering with a ceramic film; and decompressing and concentrating and then carrying out molecular distillation and separation. According to the method, efficient, rapid, energy-saving and environment-friendly effects are achieved; prepared molecular distillate has a real aroma and the taste is remarkably improved; the product is used as essence and spice for cigarettes so that the aroma of the cigarettes can be obviously improved; and meanwhile, the product also has soft, fine and smooth smoke and has the effects of improving the sweet feeling of the oral cavity and improving the smoke volatility.

The invention provides an electronic cigarette tobacco extract without sweet greasy taste and an electronic liquid. The tobacco extract and the electronic liquid are characterized in that the electronic cigarette tobacco extract without sweet greasy taste is prepared through the following steps: amino acid or amino compounds are added to tobacco raw materials, the mixture is baked at a high temperature for a certain period of time, the content of saccharides in the tobacco is reduced, and aroma substances are produced; then a solvent extraction method is adopted for extraction, and a tobacco extract is prepared; the extract is redissolved by ethanol, frozen and dewaxed, and absolute oil which is the electronic cigarette tobacco extract without sweet greasy taste is obtained; the absolute oil is diluted by propylene glycol, glycerol or other mixed solvent, and the electronic liquid without sweet greasy taste is obtained and can be used independently or used after blending with other perfume. The tobacco extract has no sweet greasy taste and has sufficient and full tobacco aroma as well as pure and comfortable taste when used, so that the aroma and the taste of the electronic cigarette are more similar to those of a cigarette, and the requirements of consumers are met better.

The invention relates to a tea flower extract composition and its use in a cigarette. The tea flower extract composition comprises iron mercy goddess tea flower extract, robe tea flower extract, cassia tea flower extract and narcissus tea flower extract. The tea flower extract composition is added into the cigarette so that the cigarette has a harmonious fragrance. The tea flower extract composition can improve fullness of a cigarette fragrance and volatility of a cigarette fragrance without change of original cigarette performances and original cigarette processing processes. The tea flower extract composition has a sweet taste, promotes secretion of saliva of a smoker, improves miscellaneous gas and irritation and improves integral smoking quality.

The present invention discloses one kind of composite modified and shaped paper for cigarette filter tip. The composite modified and shaped paper is prepared through the following steps: preparing coating fluid, spraying or rolling the coating fluid in the amount of 1-10 wt% of paper onto the paper, stoving to eliminate excessive water, cutting to the required sizes and packing. The coating fluid consists of adhering material 3-30 weight portions, including agent 5-10 weight portions, demulsifier 5-10 weight portions, sweetening agent 5-10 weight portions, humidizer 5- 20 weight portions, fume pH regulator 2-8 weight portions, cigarette taste improver 10-30 weight portions, selective harm reducer 30-50 weight portions, and water in the amount to reach dry material content of 1-20 wt%.

Provided is an improved preparation method for electronic cigarette smoke solution. The method comprises charging and perfuming procedures. A charging procedure is aimed at high boiling point edible and tobacco flavor or edible and tobacco flavor containing waxiness, the edible and tobacco flavor is mixed with propylene glycol or propylene glycol / glycerin, and then molecular distillation is performed to obtain an electronic smoke solution base stock. The perfuming procedure is aimed at essential oil kind and low boiling point chemical synthesis perfumes and edible and tobacco flavors blended by the two kinds of perfumes. Through adding perfumes and natural nicotine in the base stock, an electronic cigarette smoke solution product is obtained. In the method, charging and perfuming are processed respectively, high boiling point and waxy components in the perfumes are removed, and defects that high boiling point perfumes easily generate charring smell, and electronic cigarette smoke solution is clear and bright and fragrance transmission property is better. Perfuming is performed in a final step, preventing loss of low boiling point essences, and kinds and contents of essences can be adjusted according to characteristics of the electronic cigarette base stock. The method gives rich note on the electronic cigarette smoke solution.

The invention belongs to the technical field of cigarette production, and particularly relates to a method for producing novel blended type cigarettes with flue-cured tobacco styles. The method comprises extracting Hubei Enshi burley tobacco and American burley tobacco with ethyl alcohol in a concentration of 30%; subjecting the extracted tobacco to high-temperature processing in a baking oven, and performing charging for spare; meanwhile, performing charging and perfuming on functional module cut tobaccos according to requirements of blended type cigarette styles; adding an appropriate number of the functional module cut tobaccos, tobacco flake cut tobaccos expanded cut stems and expanded cut tobaccos with cut flue-cured tobaccos serving as basic cut tobaccos, performing evaluation, analysis and screening repeatedly and determining a cigarette blending formula finally. The novel blended type cigarettes produced by the method have the advantages of being delicate in fume, rich and harmonious in fragrance, heavy and soft in fume, comfortable in flavor, and clear and sweet in aftertaste; the style of the novel blended type cigarettes is similar to the style of Chinese flue-cured tobacco type cigarettes, besides, the cigarettes have characteristics of international blended type cigarettes, and requirements of different consumers can be met.

The invention relates to a perfume composition comprising the constituents (by weight proportion) of the following raw materials, delta-dodecalactone 1, enhancing compounds 0.005-10, which is selected from one or combination of more than one of butanedione, n-Butyric acid, dodecanic acid, delta-docalactone, 4-methyl-5(bata- ethoxyl) thiazole. The raw materials can be added by carrier based on requirement, wherein the carrier is one or combination of more than one of glucose, starch, maltodextrin, 95% ethanol, distilled water and propylene glycol.

The invention discloses a method for preparing a high-fragrance tobacco extract and belongs to the technical field of a tobacco additive. The method comprises the steps of 1, adding propylene glycol into tobacco raw materials, and then standing and baking the raw materials; 2, crushing, adding solvent extraction liquid into crushed materials; 3, filtrating extraction liquid with an ultra-filtration membrane to prepare permeate liquid, and decompressing and distilling the permeate liquid to prepare a condensate; and 4, secondarily separating the condensate by a molecular distillation method, and collecting a light component as the high-fragrance tobacco extract. In the preparing method, tobacco raw materials are in advance treated by baking so that Maillard reaction presents between the tobacco reducing sugar and the nitrogen-containing compound, generate pyrone and furanone substances are prepared and baking fragrance is increased; propylene glycol is added into the tobacco so that bad flavor caused by charred tobacco at high baking temperature can be prevented; macro-molecular substances and high boiling-point non-volatile substances can be effectively removed by the membrane separation-molecular distillation double separation process, and specific aroma components enriched in the tobacco are separated.

The invention discloses an additive capable of effectively lowering CO delivering amount of a cigarette and an application thereof. The additive is prepared by evenly mixing 99 percent of lowering CO additive and 1 percent of odor absorption improvement auxiliary agent, wherein the lowering CO additive comprises one of potassium gluconate, sodium gluconate, potassium citrate, sodium citrate, potassium bicarbonate and sodium bicarbonate or is mixture of the potassium gluconate, the sodium gluconate, the potassium citrate, the sodium citrate, the potassium bicarbonate and the sodium bicarbonate. The odor absorption improvement auxiliary agent comprises one of oligomeric maltose and oligomeric fructose or mixture of the oligomeric maltose and the oligomeric fructose. The additive is prepared into eluate for cigarette paper, the eluate is used in the cigarette paper by the spraying process, and the obtained finished products of cigarette paper are used for cigarette production, thereby effectively lowering the CO delivering amount of the cigarette and simultaneously improving the quality of the low CO cigarette. The additive has the advantages of simple method, low cost and obvious industrial application value.

The invention discloses E-cigarette nicotine liquid and a preparation method thereof and belongs to the technical field of E-cigarette nicotine liquids. The E-cigarette nicotine liquid is made from high-nicotine tobacco extract, tobacco flavor and the like, wherein the tobacco extract has rich tobacco characteristic fragrant ingredients (such as megastigmatrienone, beta-damascone, pyrones, and furanones) and nicotine, can provide tobacco aroma and curing aroma and meet the physiological needs of consumers, and provides better satisfaction. The high-nicotine tobacco extract has very low contents of high-boiling-point ingredients and macromolecular substances (such as proteins, pectin, and polysaccharides), is free of burnt smell and low in sweetness, and can supplement aroma and cover peculiar odors, lower stimulus and improve taste strength. By being used with tobacco flavors, the E-cigarette nicotine liquid has enhanced curing aroma and tobacco aroma, and has strong aroma and good volatility. The preparation process of the E-cigarette nicotine liquid is simple, is simple and easy to perform, and is applicable to large-scale industrial production and application.

The invention discloses a method for preparing a spice for a red date fermentation type wine fragrant cigarette, which belongs to the technical field of tobacco and relates to the preparation method of a cigarette spice. The method comprises the following steps: 1. pretreatment is carried out; 2. pretreated and sterilized red date mashed fruit is subjected to microbe fermentation; 3. the red date mashed fruit after fermentation is subjected to oak ageing; and 4. the red date mashed fruit after oak ageing is subjected to concentration and refining to obtain a brown red pasty matter which is the spice for red date fermentation type wine fragrant cigarette. The method is unique, simple and easily operated; and when the spice obtained is used in the cigarette, the spice can improve the permeability of smoke, have obvious flavor enhancing effect and give special flagrance to the cigarette.

The invention discloses fructus evodiae, bergamot or symplocos sumuntia essential oil, as well as a preparation method and application thereof in cigarettes. The preparation method comprises the following steps: cleaning and drying a plant; smashing to obtain plant powder; distilling the plant powder in soduim chloride water for 8 hours to 12 hours at the temperature of 80 DEG C to 100 DEG C; collecting volatile matters to obtain faint yellow essential oil; and postprocessing to obtain the plant essential oil, wherein the mass ratio of the plant powder to the soduim chloride water is 1:10-20,and the plant is the fructus evodiae, the bergamot or the symplocos sumuntia. The method is simple to operate; is easy to control; has low cost, low energy consumption, no pollution to environment, and no need to change the existing process technology of the cigareetes; and is suitable for industrial production. The plant essential oil can be applied to the cigarettes, and the cigarettes added with the plant essential oil has increased fragrance amount when being smoked, herb note, outstanding sweet aroma, unique aroma, increased elegance and grace, better affinity, good inductivity and enhanced comfort level.

The invention relates to the technical field of tobacco preparation, and in particular relates to a pectinase produced through mixed bacterium fermentation, and an application thereof in tobacco sheet processing. The pectinase is obtained through the steps of strain activation, seed liquid preparation, fermentation culture, enzyme solution crude extraction, and the like. The crude enzyme solution is diluted by 0-20 times, and the diluted crude enzyme solution is used for treating tobacco sheets by enzymolysis for 2-6h at a temperature of 40-50 DEG C according to a ratio that tobacco sheet to pectinase is 1:(1-5). An overall technical route of the application comprises the following steps: specific strains are mixed and fermented, wherein an optimal fermentation condition is obtained by screening and optimization, such that the crude enzyme solution with highest pectinase enzyme activity is obtained; the crude enzyme solution is used for treating tobacco sheets, such that pectin content in the tobacco sheets can be reduced, and a best degradation effect can be obtained. The maximal enzyme activity of the crude enzyme solution provided by the invention can be higher than 3200U / mL. When the crude enzyme solution is used in tobacco sheet treatment, the pectin content in the tobacco sheets can be reduced by approximately 1 / 4, and tobacco smoking quality can be well improved.

The invention discloses a cigar tobacco leaf additive and a production method thereof. The production method of the cigar tobacco leaf additive comprises the following steps of: smashing natural plants into pulp; adding an enzyme preparation for enzymolysis and then inactivating enzyme; carrying out Maillard reaction within a temperature range of 110 to 150DEG C; distilling a reacted mixture at normal pressure to obtain a first component; heating and extracting residual slag generated by distilling with a compound solvent consisting of ethanol and water to obtain a second component; and mixing 2 to 4 parts of first component with 6 to 8 parts of second component to obtain the cigar tobacco leaf additive. According to the cigar tobacco leaf additive disclosed by the invention, the styles of cigar cigarettes are enriched and the sweet feeling of cigar flavor is added, so that the cigar cigarette is sweet and comfortable in flavor and pure and mild in smoke.

The invention provides flowery flavor essence for cigarette dropping pills and application. The flowery flavor essence is prepared from the following raw materials of valerian oil, neroli essential oil, sweet osmanthus absolute, lavender essential oil, rose essential oil, violet leaf extract, isoamyl isovalerate and olive oil and is obtained by mixing and uniformly stirring the raw materials for 1 to 3 hours, then standing for 24 to 48 hours and filtering out sediment through a sieve which is 60 to 80 meshes. The flowery flavor essence can be prepared into the cigarette dropping pills by using a dropping pill machine, and then the cigarette dropping pills can be located in and applied to a cigarette holder bar. When the flowery flavor essence provided by the invention is used for preparing the dropping pills, the production stability is better, the breakage rate of the cigarette dropping pills is low, and the rate of finished products is 80 to 85 percent. During a smoke panel test of prepared cigarette, a smoker can feel that the flowery flavor in the smoking taste is obviously enhanced, the fragrance is elegant and ethereal, and the remaining taste is comfortable.

The invention provides a preparation method for plum spice used for cigarette. The method comprises the steps that after being washed and airdried, plum fruits are dried; after smashing is conducted, plum coarse powder is obtained through ten-mesh sieve; after reflux extraction is conducted by using water, filter liquor is obtained by filtering, and a plum coarse extracting solution is obtained; after the plum coarse extracting solution is cooled down to indoor temperature, subtilisin is added, and plum enzymolysis liquid is obtained through enzymolysis; ethanol is added, and plum sedimentation liquid is obtained by stirring and sedimenting; after filtering is conducted, concentration is conducted, and n-butanol extract liquor is obtained through extraction after water and n-butanol are added; the plum spice used for the cigarette is obtained by adding propylene glycol after concentration is conducted. The plum spice is obtained by using the plum fruits, the utilization rate of a plum is improved, by means of the preparation method, environmental protection is achieved, the solvent can be reused, and the cost is lowered. At the same time, the perfume of the plum spice used for the cigarette prepared by using the method is intense and lifelike, the aroma quality of the cigarette can be improved obviously, the functions of softening of smoke, strengthening of oral sweet feeling and improving of sending performance of the smoke are achieved, and the practicality is strong.

The invention discloses a method for preparing camphor tree leaf tobacco flavor, comprising the steps of screening microbe on the surface of tobacco leaf, isolating the microbe capable of producing aroma, mixing with germfree camphor tree leaves, carrying out solid fermentation, extracting volatile oil in fermentation products, and diluting to obtain the camphor tree leaf tobacco flavor. In the invention, the tobacco flavor is obtained through a method of microbial fermentation to ensure that active constituents in the fermentation raw material can be effectively preserved, the process is simple and a new way is provided for flavor preparing industry. The obtained camphor tree leaf tobacco flavor is capable of reducing the harms of tobacco to human body to a certain degree; and the smoke is fine and smooth, and has moist feeling, slight sweet feeling and good penetration to ensure that the throat irritation is obviously relieved, the smoke has brewing aroma and fermented sour aroma and has no obvious residual on the tongue surface.

The invention belongs to the technical field of tobacco flavors and particularly relates to a method for preparing a tobacco dendrobium candidum flavor with sorghum liquor as an extraction solvent. On the basis of the two technical improvements that natural extraction raw materials are mixed and sorghum liquor serves as the extraction solvent, the method aims at solving the problem that when tobacco dendrobium candidum flavor products are used in cigarettes, permeability is weakened. Unique wine fragrance is given to the flavor, and the moist and sweet taste is added.

The invention discloses a lemon grass porous particle and application thereof to cigarettes. The lemon grass porous particle adopts lemon grass powder with the water content being 7 to 9 percent and the particle diameter being 100 to 160 meshes and micro-powder silica gel as raw materials, and adopts one kind or several kinds of materials from sodium carboxymethyl starch and sodium carboxymethyl starch as bonding agents, a fluidized bed top spraying process is adopted for preparation, and 20 to 60 meshes of lemon grass porous particles are obtained. The particle has the advantages that the surface is rough, the specific surface area is higher, the effective contact area of the particle materials and the smoke gas of the cigarettes can be obviously increased, and crotonaldehyde and ammonia in the smoke gas of the cigarettes can be selectively adsorbed. The particle can effectively reduce the irritation of the smoke gas of the cigarettes and improve the aftertaste, and meanwhile, the effect of enhancing the ventilation effect of the smoke gas is also realized. The lemon grass porous particle provided by the invention has the advantages that the production process is simple, the operability and the standardability are high, the raw materials can be easily obtained, the cost is low, the industrial production can be conveniently realized, and good application prospects are realized.

The invention discloses a Pelargonium graveolens porous particle and application thereof to cigarettes. Pelargonium graveolens porous particles with a particle size of 20 meshes to 60 meshes are prepared by using mixed Pelargonium graveolens stem, leaf and flower powder with water content of 7-9 percent and a particle size of 100 meshes to 160 meshes as raw materials, using one kind or several kinds of hydroxypropyl methyl cellulose and sodium carboxymethyl starch as a binding agent and adopting a fluidized bed top spraying technology. The particle has the advantages that the surface is rough, the specific surface area is larger, the effective contact area of particle materials and cigarette smoke can be obviously improved, and hydrogen cyanide and crotonaldehyde in the cigarette smoke can be selectively adsorbed; the particle not only has a function of reducing the harm, but also can enrich the smoke flavor, improving the sweetness and has an efficacy of improving smoke volatility; the production process is simple, the operability and the standardization capability are strong, the raw materials is easy to obtain, the cost is low, the realization of industrial production is facilitated and the application prospect is good.

The invention discloses a cigarette dry bead filter tip rod with a function of improving smoke permeability; the circumference of the bottom surface of the filter tip rod is 19.8mm, and the middle section of the strand is loaded with a dry bead with the diameter of 2.75 + / -0.15 mm; the dry bead is prepared by taking a zeolite molecular sieve as the main raw material through steps of pelletizing, agilawood attaching and forming processes; an agilawood composite extract capable of improving the smoke permeation function is adsorbed on the dry bead; due to the porous structure of the dry bead, inthe smoking process of the cigarettes, the essence is slowly and uniformly released along with the smoke gas without burning, so that the diversity of the smoking taste is increased; and meanwhile, the effect of improving the smoke permeability function can be achieved.

The invention discloses natural plant essential oil, a preparation method thereof and application of the natural plant essential oil to cigarettes. The preparation method comprises the following steps of: cleaning plants, drying, and crushing to obtain plant powder; and distilling the plant powder in an aqueous solution of sodium chloride at the temperature of between 80 and 100 DEG C for 8 to 12hours, collecting volatile matter to obtain light yellow essential oil, and after-treating to obtain the plant essential oil, wherein the mass ratio of the plant powder to the aqueous solution of sodium chloride is 1:(10-20); and the plants are myrica rubra leaves, Juniperus formosana Hayata, Illicium lanceolatum or Akebia trifoliate. The method is easy to operate and control, is low in cost and low in energy consumption, does not pollute the environment, and is suitable for industrialized production, and the conventional technology for processing the cigarettes is not required to be changed.The plant essential oil can be applied to the cigarettes; and the cigarettes added with the plant essential oil have increased aroma volume and herbal medicine note when smoked, the aroma is unique and has increased richness and elegant feeling as well as good harmony, consistency and permeability, and the comfort level is strengthened.

The invention discloses plant essential oil, a preparation method of the plant essential oil, and application of the plant essential oil to cigarettes. The preparation method includes: cleaning plants prior to drying, and crushing to obtain plant powder; and distilling the plant powder in sodium chloride solution at 80 DEGC to 100 DEG C for 8 hours to 12 hours, collecting volatiles to obtain light yellow essential oil, and processing the light yellow essential oil to obtain the plant essential oil, wherein a mass ratio of the plant powder to the sodium chloride is 1:10-20, and the plants belong to oriental blueberry, herba lycopi, anaphalis sinica hance or rosa laevigata michx. The preparation method is simple in operation, easy in control, low in cost, low in environment pollution and applicable to industrial production, while existing cigarette processing technics need no change. The plant essential oil is applicable to cigarettes, and the cigarettes with the plant essential oil aremore fragrant in smoking, have smell of herbs, are unique and rich in fragrance, and are more flowing, harmonious, penetrating and comfortable.

The invention discloses a Bacillus methylotrophicus strain VJ4-1 of which the preservation number is CCTCC No:M 2012004. The invention provides a tobacco angelica sinensis extract prepared by using microbe Bacillus methylotrophicus and conducting biotransformation and an application of the angelica sinensis extract in tobacco. According to the invention, by applying the fermented and purified tobacco angelica sinensis extract in cigarettes, the extract is in harmony with the smoke, increases the sweet aroma and the sweetness after taste, reduces the irritancy, reduces miscellaneous gases, strengthens the penetrability, makes the smoke soft and smooth, reduces the drying degree, make the aftertaste good, and improves the tasting; the method has the advantages of simple process, mild reaction conditions, low pollution, high concentration of the products, simple extraction steps, clean production, environmentally friendly product, safety and reliability, wide sources of main raw materials, extremely low cost, and nature, and has an industrial production prospect.

The invention discloses a tobacco flavor with uniform and stable and a preparation method thereof. The tobacco flavor is an extract with a relative density of 1.02 to 1.20 which is extracted by 60-95 mass percent ethanol from a mixture, wherein the mixture comprises red date, Chinese angelica and dwarf lilyturf tuber in a weight ratio of 0.2-30.0:0.5-20.0:0.5-30.0. The tobacco flavor can degrade cigarette tar. When combined with natural tobacco plant fragrance, the tobacco flavor makes cigarettes fresh, elegant, sweet, pure, mild, light, transparent and thus greatly enhances the quality of cigarettes. The invention also discloses a method for preparing the tobacco flavor. The method can make a uniform, stable and sweet liquid flavor additive without impurities, and the content of the fragrance source component of the tobacco flavor is over 80%.

The invention relates to the field of tobaccos, in particular to a composition, a preparation method thereof and an application of the composition serving as a tobacco flavor. The composition providedby the invention is prepared from a licorice root extract, acid compounds, ethanol compounds, ester compounds, a sweetening agent, flavors, fragrances and a solvent. The composition is characterizedin that the taste of cigarettes can be improved, inherent smell of the cigarettes can be enhanced, the pungent smell of the cigarettes can be lowered. As proved by the sense evaluation, the cigarettesprepared by the composition is soft in taste, has remarkable sweet taste, good foreign flavor removing effect, remarkable pungent smell lowering effect and durable sweet taste, and is improved in flavor dispersion property.

The invention discloses a control method, particularly discloses a control method for improving finished product tobacco leaf quality based on leaf position characteristics, and belongs to the technical field of tobacco cultivation technology. The control method for improving finished product tobacco leaf quality based on the leaf position characteristics controls the number of tobacco leaves to improve the finished product tobacco leaf quality in the growth process of tobacco. According to the control method, after the working procedure of topping and reserving 20 blades is executed, the finished product tobacco leaf quality is improved through the working procedure of removing part of blades at the leaf positions on the top and / or bottom again.

The invention belongs to the technical field of preparation of tobacco flavors and fragrances, and particularly relates to a tobacco extract, a preparation method and application thereof and a tobacco product. The preparation method of the tobacco extract comprises the following steps that (1), tobacco leaves are smashed and then subjected to subcritical extraction, an extracting agent is removed, tobacco extractum is obtained, and the extracting agent is butane or dimethyl ether; (2) alcohol precipitation and solid-liquid separation are carried out on the tobacco extractum obtained in the step (1), and the obtained clear liquid is concentrated to obtain a tobacco concentrate; and (3) the tobacco concentrate obtained in the step (2) is subjected to first-stage molecular distillation, heavy components obtained through the first-stage molecular distillation are subjected to second-stage molecular distillation, the obtained light components are the tobacco extract, the first-stage molecular distillation temperature is 40-80 DEG C, the distillation pressure is 0.001-0.01 mbar, the second-stage molecular distillation temperature is 100-120 DEG C, and the distillation pressure is 0.001-0.01 mbar. The method is simple in process and suitable for large-scale production.