90results about How to "Strong practicability" patented technology

Auto shoe cover dispenser, includes machine body (1), traction and extension mechanism (2), separation and hooking mechanism (3), turning mechanism (4), traction driving mechanism (5), shoe cover box (6). The body of shoe cover box (6) is equipped with shoe cover separating exit, separation and hooking mechanism extends into the shoe cover separating exit to pull out the shoe cover, and the traction and extension mechanism expands it, just put the foot into the stretched shoe cover, and tread out downwards. The advantages of this utility model are, first, its simple and rational structure, strong practicability, safety and reliability, which uses disposable normal shoe cover without special process and technical requirements, thus greatly reducing the costs of perishable items, and affordable to a large quantity of consumers; second, shoe cover dispenser has large capacity and it's also very convenient to install shoe covers, the shoe covers installation quantity can be freely adjusted according to the user's wish, which can reach as high as dozens or even thousands of pairs, while shoe cover dispenser doesn't need to make any adjustment, to be widely used for household needs as well as various locations such as hospitals and scientific research institutes etc.

Disclosed herein is an information feedback method and system based on instant messaging relating to telecommunication techniques. An instant messaging system obtains a location of a mobile terminal from a mobile positioning system according to request information of the mobile terminal. An automatic information processing system generates location-based information according to the content of the request information and obtained location. The instant messaging system feeds back the location-based information to the mobile terminal. The request information that the mobile terminal sends to the instant messaging system includes an instant messaging identifier of the mobile terminal. The instant messaging system obtains a corresponding and relevant mobile identifier according to the instant messaging identifier. The mobile identifier indicates the information identifier of the mobile terminal in the mobile network system and is used for the mobile positioning system to obtain the location of the mobile terminal. In this way, the disclosed method and system provide a value-added technique relating to location with high serviceability and practicability.

An automatic shoe cover dispenser that includes a machine body, a traction and extension mechanism, a separation and hooking mechanism, a turning mechanism, a traction driving mechanism, and a shoe cover box. The body of the shoe cover box is equipped with a shoe cover separating exit. The separation and hooking mechanism extends into the shoe cover separating exit to pull out the shoe cover, and the traction and extension mechanism expands the shoe cover so that one merely has to insert a shoed foot into the stretched shoe cover with the tread of the shoe facing downwards. The advantages of the invention include its simple and rational structure, strong practicability, safety and reliability, and the use of a normal disposable shoe cover without special process and technical requirements, thus greatly reducing the costs of perishable items, and being affordable to a large quantity of consumers. In addition, the shoe cover dispenser has large capacity and allows for very convenient installation of shoe covers. The shoe cover installation quantity can be freely adjusted as desired and can reach a rate as high as dozens or even thousands of pairs of shoe covers before the shoe cover dispenser might need to be adjusted. The shoe cover dispenser can be widely used for household needs as well as various locations such as hospitals and scientific research institutes etc.

The invention relates to a milk bottle for breastfeeding a baby, in particular to a milk bottle capable of controlling temperature. The milk bottle comprises a dust prevention cover, a nipple, a sealing ring and a milk bottle body and is characterized by further comprising a base capable of being subjected to temperature control in a heated way, wherein the base capable of being subjected to temperature control in a heated way is spirally connected with the bottom of the milk bottle body, the nipple is fixed to a bottle opening of the milk bottle body through the sealing ring, and the dust prevention cover is placed on the nipple. A cavity is formed between an inner-layer milk bottle and an outer-layer milk bottle, can take a good heat insulation effect when milk is directly mixed with hot water without being heated and can prevent scalding injury; and the milk bottle is simple in structure, attractive in appearance and strong in practicality.

The present disclosure provides a method for measuring an internal resistance of a battery, after discharging / charging the battery under a preset constant-current, acquiring voltages of the battery within a period from ending the discharging / charging to a time when the voltage reaches stable, and then calculating different corresponding internal resistances caused by ohmic polarization, electrochemical polarization and concentration polarization separately. Since it is different for the orders of the magnitude of the characteristic time which these different polarizations need to get back into new equilibrium state after ending the discharging / charging, the method of the present disclosure classifies the internal resistances caused by these polarizations and calculated different internal resistances corresponding to the polarizations. Both the comparison with a result measured by other method and multiple embodiments in the application justify that the method in the present disclosure has high reliability and strong practicability.

The invention discloses an initiative mild grinding and polishing device and a method based on a viscous-elastic material, and mainly solves such problems as nonuniform removing quantity, imprecious positioning of a polishing head, mismatching between the shape of a polishing tool and the surface of a workpiece and generation of errors by vibration of the workpiece in the polishing process. The device consists of such several parts as an ultrasonic generation part, a laser displacement sensor detecting part, a viscous-elastic material polishing part and a worktable. The device machines an optical free curved surface, needs no frequent adjustment of the cutter position for the surface of a part with a more complex curved surface, adjusts the force application frequency to change the shape of the viscous-elastic polishing head so as to always keep a gapless bonding state between the viscous-elastic grinding and polishing head and the surface of the workpiece in the machining process, and realizes initiative mild grinding and polishing of the workpiece.

The invention relates to a method for refining biodiesel by-product crude glycerine. The method comprises the following steps: saponifying, namely weighing a certain amount of biodiesel by-product crude glycerine, and carrying out saponification according to the molar ratio of potassium hydroxide methanol solution to esters being 1-2; 2, acidizing, namely adding 30g of saponified crude glycerine to a 500mL of three-necked flask, adding a polar reagent methanol as an extracting agent according to the volume ratio of 4:1 to 1:4, adding a dilute acid solution to adjust the pH of the solution to be 1-5, agitating, standing and layering and collecting subnatant; 3, adsorbing, namely respectively adding 50-80mg / L of activated carbon to the subnatant, heating at 70 DEG C to remove methanol, finally pouring the solution into a separating funnel, cooling and layering: 4, determining the content of glycerine. The method has the beneficial effects that the biodiesel by-product crude glycerine is refined, so that not only is the value of crude glycerine improved, but also raw materials are supplied to the fields such as pharmacy, food and the like. The method disclosed by the invention is simple, mild in reaction condition, low in requirement on equipment, and strong in practicability.

The invention discloses a microscopic imaging technique compounding surface plasma resonance (SPR) and surface enhanced Raman scattering (SERS) and relates to the field of surface plasma elements and surface enhanced Raman scattering. The technical key point disclosed by the invention is as follows: an SPR-SERS comprehensive microscopic imaging system is assembled, and SPR and SERS are excited and detected by a nano slit array raster bi-model structure; an SPR system judges change of an exciting angle by measuring movement of an SPR peak position to determine change of the surface effective refractive index induced by a biomolecular reaction on the surface of a chip; the SERS system directly differentiates the biomolecules by measuring the Raman spectrum; efficient and high-sensitive detection of SPR and Raman is dependent on the nano slit array raster bi-model structure: the excitation wavelength efficiently excites SPR through the raster structure; SPR generates dipole vibration in nanogaps in a metal surface spreading process, and the surface electric field generated by SPR and the nano silt dipole jointly act to enhance the surface local electric field to acquire an enhanced Raman signal.

The invention relates to a high-attitude intelligent life saving device. One end of the external surface of a double-layer permanent seat is provided with a rope pulley, the rope pulley is close to a floating rope-pressing pulley group, the upper end and the lower end of the floating rope-pressing pulley are respectively provided with a rope-guiding pulley group, and the middle cavity position of the double-layer permanent seat is provided with an accelerating gear transmission group. The invention has the technical effects that the intelligent and passive life saving device is realized by using mechanical-electrical integrated design, and the descending speed is controlled by using a singlechip microcomputer, so that the life saving device has better safety and stability, high speed and high comfort level; the safe reliability of the system is greatly improved, so that the intelligent slow-descending life saving device has strong overloading capacity; the use altitude range is large (in theory, as long as the rope can withstand the load, the life saving device can be used, and 1 km in altitude range can be reached under the conditions that the rope diameter is 3mm, the weight of people is 60kg and the allowable stress is 200mp.); the life saving device has small size and light weight and is convenient to install, store and carry; and no lubricating oil or grease leaks, and the life saving device does not contain toxic and corrosive materials and has low cost.

The invention provides a combined dust collector and relates to the technical field of living dust removal tools. The combined dust collector comprises a handheld dust collection device and a base plate that is detachably and fixedly connected with the handheld dust collection device, wherein the lower end of the base plate is provided with a first dust collection opening and an air duct communicated with the first dust collection opening; the handheld dust collection device is internally provided with a fan and a fan motor for driving the fan to rotate; the bottom end of the handheld dust collection device is provided with a second dust collection opening, and the side end of the handheld dust collection device is provided with an air outlet; the first dust collection opening, the air duct, the second dust collection opening and the air outlet are communicated with each other in sequence. The combined dust collector provided by the invention is used for removing dust.

The invention relates to a fresh-cut fruit and vegetable coating preservative containing chitosan and calcium ascorbate and belongs to the technical field of fresh-cut fruit and vegetable preservation. The main technical scheme is as follows: the preservative is prepared from, in percentage by mass, 1.0%-3.0% of chitosan, 2.0%-5.0% of calcium ascorbate and the balance of water. The mass fraction ratio of the chitosan to the calcium ascorbate is (1-3): (2-5). The preparation method of the fresh-cut fruit and vegetable coating preservative comprises the steps as follows: the chitosan, the calcium ascorbate and the water are weighed; and the calcium ascorbate is stirred to be dissolved with 20wt%-30wt% of water; the chitosan is added; ultrasonic dissolution is performed, the rest water is added for uniform dissolution; and the fresh-cut fruit and vegetable coating preservative is obtained. The provided fresh-cut fruit and vegetable coating preservative is low in production cost, non-toxicand safe to the human body and environmentally friendly and meets the green and environmental protection requirement of food preservation.

The invention provides a water control and fertilizer control method for eucalyptus seedlings. By selecting proper root control devices used as potting contains and manufacturing special potting bottoms, root systems are prevented from penetrating into soil via the bottoms and soil steam is prevented from infiltrating into soil in the root control device containers to influence manual control conditions; effective water resistance, water control and nutrient control are realized through the technical means of white and black films and on-pipe type pressure compensation drippers; the volumetric water content of soil moisture can be rapidly measured by using a TDR 300 soil moisture analyzer, and the volumetric water content can better reflect the actual soil moisture content. The water control and fertilizer control method for eucalyptus seedlings can provide a complicated growth environment for the cultivation of eucalyptus seedlings; by combining the effective control of moisture and nutrients, the method realizes effective adjustment of the physiology of nursery stocks; the water and fertilizer coupling physiological effect of the nursery stocks can be further known, and primal parents of eucalyptus capable of adapting to complicated environment can be bred.

The present invention has the advantages of simple structure, low detection cost, high measurement precision, high detection speed, strong practicability, etc. The present invention relates to a novel array photoelectric sensor grating displacement detection system and method. The system includes a parallel light source, an incremental glass grating ruler, photoelectric sensor arrays, a high-speed voltage comparator, a signal processing unit and a displacement display unit, wherein the incremental glass grating ruler is perpendicular to an irradiation direction, of the parallel light source.

The invention discloses a brake protection device of a wind driven generator, and belongs to the technical field of brake protection devices of wind driven generators. The brake protection device comprises two brake clamping rings, wherein a motor shaft is arranged between the two brake clamping rings, brake pads are arranged on the upper side and the lower side of the motor shaft, and fixing grooves are formed in the positions, corresponding to the brake pads, in the brake clamping rings. According to the brake protection device, a limiting mechanism, an arc-shaped sliding plate, a semi-ellipsoidal groove, a connecting strip, a pulling rod and a containing groove are arranged, wherein the limiting mechanism comprises a supporting block, a rotating shaft, a rotating knob, a fixing plate, afixing bolt, a rotating column, a limiting plate, a reinforcing limiting clamping block and a reinforcing limiting clamping groove; and under the mutual cooperation of the structures, the function that the brake pads are convenient to mount and dismount is achieved, so that the brake pads are convenient to replace after being aged after being used for a period of time, the subsequent working efficiency of the brake pads is effectively guaranteed, the structure is simple, the operation is convenient and fast, and the operability is high.

A safety buffer for guide rails is a buffer device mounted on the guide rails, which comprises a rack and a unilateral damping device. Wherein the unilateral damping device comprises a bottom shell, a middle shell, a top shell, a damping case with convex shaft, a damping case cover, a damping sheet with middle shaft, a seal ring and a gear. A slot with long axis and short axis is positioned respectively on the bottom shell and the top shell, the damping sheet is mounted in the damping case, the middle shaft of the damping sheet goes through the damping case and the extruded portion is fixedly connected with the gear, the end of the middle shaft of the damping sheet goes into the slot of the upper face of the top shell; the damping case has a tooth on its outer circumference, the convex shaft of the damping case goes into the slot of the lower face of the external housing; a brake tooth locates on one side of the inner wall of external housing along the long axis of the slot; the gear engages with the rack. The safety buffer for guide rails according to the present invention shall not hurt people's hands when using it under any conditions. It has a strong safety and practicability without noise, and adapts to any drawers needed to close tightly and the open and close orbit of the congeneric machine.

A method for pre-accessing a conference telephone is disclosed in the present invention. The method includes that: a network side detects a received call whose target is a main control party after the main control party initiates an encryption conference telephone; the call is not accessed if the call is a non-encryption conversation; the call is allowed to be accessed if the call is an encryption conversation. A system for pre-accessing a conference telephone is also disclosed in the present invention, wherein, the system includes a pre-accessing processing unit and a call type detection unit of the network side. A network side device is also disclosed in the present invention. The present invention realizes the pre-accessing of the encryption conference telephone, thereby improving security of the encryption conversation as well as avoiding the problem that a user is frequently affected when performing the encryption conference telephone.

The invention discloses coating equipment for thermal spraying. The coating equipment comprises a box body, wherein a base is arranged at the bottom of the box body, a first groove is formed in the base, a first rubber gasket is arranged on the inner side wall of the first groove, a rotating motor is arranged over the first rubber gasket, a rotating shaft is arranged over the rotating motor, a second rotating plate is arranged above the rotating shaft, and a plurality of limiting columns are arranged over the second rotating plate. According to the coating equipment for thermal spraying, a second electric hydraulic rod is arranged over a first rotating plate, so that the function of up-and-down telescoping of a fixing plate can be realized, the two sides of the fixing plate are correspondingly provided with first electric hydraulic rods, the sides, close to each other, of the first electric hydraulic rods are provided with fixing rods, and clamping plates are arranged on the sides, faraway from the first electric hydraulic rods, of the fixing rods. The structures are matched with one another, so that the function of automatically clamping a workpiece to be sprayed can be realized,and time and labor are saved.

The invention relates to a conical wheel type stepless speed change mechanism. The conical wheel type stepless speed change mechanism comprises a case, a power input shaft and a power output shaft. The power input shaft and the power output shaft are arranged in the case in parallel, an input conical wheel and an output conical wheel with the opposite directions are fixed to the power input shaftand the power output shaft correspondingly, an umbrella-shaped expansion mechanism is arranged between the input conical wheel and the output conical wheel, and comprises an umbrella-shaped mechanism,an expansion driving mechanism and a positioning driving mechanism, the umbrella-shaped mechanism comprises an umbrella shaft and multiple expansion parts, an umbrella shaft is movably arranged on one side wall of the case in a penetrating manner, the expansion parts are rotatably connected to the periphery of one end of the umbrella shaft, and an umbrella shape is formed; the expansion parts aredriven by the expansion driving mechanism and are expanded outwards to be used for pressing the conical faces of the input conical wheel and the output conical wheel to communicate with power transmission, the other end of the umbrella shaft is rotatably connected with the positioning driving mechanism arranged outside the case, the positioning driving mechanism drives the umbrella shaft to drivethe multiple expansion parts to move in the axial direction of the umbrella shaft to be used for adjusting the pressing position to achieve the stepless speed change.

The invention discloses a tennis ball collecting device for tennis training, which comprises a bottom plate, a vertical plate, a handle, a collecting shell, a vibrating shell, a fixing block, a collecting hole, a hose, a collecting pipe, an air draft assembly, a protective net plate, a guide plate, a first discharging pipe, a vibrating table, a lifting rod, a dust collecting box, a collecting disc, a filter net, a discharging plate, a discharging opening, a second discharging pipe and a control panel. An air draft assembly is arranged above the collecting shell, a vibrating table is arranged on the lower portion in the vibrating shell, lifting rods are arranged on the two sides above the vibrating table, a dust collecting box is arranged at the upper ends of the lifting rods, a collecting disc is arranged above the dust collecting box, and a filter screen is arranged between the collecting disc and the dust collecting box. According to the tennis ball collecting device, the collecting pipe, the collecting shell, the air draft assembly and the vibration shell are arranged in the tennis ball collecting device and cooperate with one another, after the collecting pipe collects tennis balls into the collecting shell through the air draft assembly, the tennis balls are conveyed into the vibration shell to be vibrated, dust and impurities are vibrated, and collecting and cleaning of the tennis balls are achieved.

The invention provides an automatic hard disk rotating speed control system and method. The automatic hard disk rotating speed control system and method are applied to computers. A computer comprises a hard disk. The hard disk comprises a register, a signal generator, a rotating speed motor and a data storage region. The method includes the steps that when the hard disk works normally, the current rotating speed of the hard disk is detected, and the rotating speed value of the hard disk is written into the register; the working state of the hard disk is monitored in real time, and a rotating speed control value for controlling the hard disk to read and write data according to the working state of the hard disk; the rotating speed value of the hard disk is read from the register, and whether the rotating speed value of the hard disk is equal to the rotating speed control value or not is judged; when the rotating speed of the hard disk is equal to the rotating speed control value, the signal generator is adopted to generate a control signal to control the rotating speed of the hard disk according to the rotating sped control value; the rotating speed of the rotating speed motor is controlled through the generated control signal to adjust the current rotating speed of the hard disk automatically. By means of the automatic hard disk rotating speed control system and method, the rotating speed of the hard disk can be adjusted according to the real-time working state of the hard disk.

The invention relates to a nutrient application method at the seedling stage of castanopsis hystrix and belongs to the technical field of applying fertilizer at the seedling stage of the castanopsis hystrix. The method includes the steps of 1), determining the nutrient NPK (nitrogen, phosphorus and potassium) content of seedlings during transplanting of the castanopsis hystrix; 2), determining theNPK content of castanopsis hystrix seedlings out of nursery; 3), according to the difference of the nutrient NPK content of seedlings and NPK content of the castanopsis hystrix seedlings out of nursery, cultivating the amount of NPK needed for seedling growth; 4), distributing nutrients to each month according to an index fertilizer method in the nursery period; 5), according to the monthly dosage of NPK, preparing NPK fertilizer with ammonium nitrate HN4NO3, potassium dihydrogen phosphate KH2PO4 and potassium nitrate KNO3, that is, according to the calculated NPK content, preparing a solution; 7), according to the monthly nutrient content needed, preparing the solution for quantitative application. The nutrient application method is simple, efficient and highly practical.

The invention discloses an MAX@M composite electrical contact reinforced phase material, a composite electrical contact material and a preparation method. The MAX@M composite electrical contact reinforced phase material is MAX@M coated with metal nanoparticles on the surface, the inner core of the MAX@M composite electrical contact reinforced phase material is a three-dimensional material MAX phase, and the outer shell is metal nanoparticles coated with the surface. An MXene material is generated through sensitization on the surface of an MAX phase, and after activation, metal nanoparticles are coated on the surface of the MXene material by using a chemical plating method to prepare an MAX@M composite electrical contact reinforced phase material coated with metal nanoparticles on the surface. After the reinforced phase material is compounded with the Ag base of the low-voltage electric contact, the problems of interface reaction and diffusion between Ag and MAX are effectively solved,and the chemical plating method is convenient in process, low in technical cost and high in practicability. When the MAX@M coated with the metal nanoparticles on the surface is used as the reinforcement phase of the low-voltage contact electric contact material, the maximum proportion of the reinforcement phase in the composite material can reach 50wt%, the silver-saving effect is obvious, and thebasic performance of the composite material can be greatly improved.

The invention specifically relates to an air inlet protection device of a local fan. The air inlet protection device comprises a protective net. The periphery of the protective net is provided with a reinforcing frame which is fixedly connected with the protective net. The protective net is coated with fluorescent powder. The reinforcing frame is provided with at least three U-shaped connecting parts which are evenly distributed on the reinforcing frame. The reinforcing frame is provided with at least two handles. The air inlet protection device is simple in structure, facilitates disassembly of the fan during maintenance, is overall not prone to deformation and can draw attention of workers easily in a dark environment.

The invention discloses a method for synthetic preservation of waxberry by using a plant extract. The method comprises the following steps of: selecting waxberry fruits which are harvested on sunny days, are of mature of 80% and have no mechanical damages or plant diseases and insect pests, and performing pre-cooling treatment on the waxberry; uniformly spraying an ethanol solution of a mixture of salicylic acid and citral on the surfaces of the waxberry fruits, wherein the concentration of the ethanol solution of each of the salicylic acid and the citral is 500 and 1000 mu mol / L respectively, and 10mL of the ethanol solution of the salicylic acid and the citral is used per kg of the waxberry fruits; then placing the waxberry fruits in plastic boxes with holes with 9-10 waxberry fruits in each box; storing in an environment of 1 plus or minus 1 DEG C for 30 days; and then transferring into the environment of 20 plus or minus 1 DEG C, and placing for 2 days as shelf life. By adopting the method disclosed by the invention for storage and preservation of the waxberry fruits, the fruits can still keep good appearance and higher quality after being stored at low temperature for 30 days, the healthy fruit rate is above 90%, and the healthy fruit rate can be kept above 75% after 2-day normal temperature (20 plus or minus 1 DEG C) shelf life.

Disclosed in the present invention is a method for preparing an oil-dispersible carotenoid preparation, comprising (by weight parts): mixing 100 parts of carotenoid microcapsule, 100-400 parts of vegetable oil and 0.1-1 part of oil-soluble antioxidant; and grinding the mixture in a colloid mill in a nitro—gen atmosphere and at 10-30° C. to obtain a uniform oil-dispersible carotenoid preparation, wherein the preparation contains 2%-14% carotenoid with an average particle size of up to 0.1-1 μm, and 100 parts of carotenoid microcapsule contains 10.5-35.8 parts carotenoid, 0.1-1 part of water-soluble antioxidant, and the remainder is a water-soluble colloid. The advantages of the present invention lie in that the oil-dispersible form has a high stability as the surface of the carotenoid particles is still protected with a dense water-soluble colloid, and that an oil-dispersible carotenoid preparation containing carotenoid with a content of up to 2%-14% and an average particle size of only 0.1-1 μm can be prepared.

The invention discloses a dirt-adsorbing device attached to the inner wall of a raw water tank and a method of the dirt-adsorbing device, relating o the technical field of raw water tanks. The dirt-adsorbing device comprises an annular base and a slide column, wherein a plurality of spiral hinge seats are arranged on one surface of the annular base and are connected with spiral head pins of turning rocking bars; a plurality of first columns are arranged on the inner surface of the annular base; a central column is arranged on the peripheral side surfaces of the first columns; a limiting column is arranged on one surface of the central column and is matched with a transverse H-shaped groove of the slide column; a step hole is formed in one surface of the limiting column and is matched with a clamp pin device; a plurality of first hinge seats are arranged on the peripheral side surface of the slide column and are matched with a first column of a connecting rod; the other end of the third column is matched with second hinge seats of the turning rocking bars. By virtue of the actions of the annular base, the slide column and the turning rocking bars, the problems of a manual cleaning manner that the labor strength is high, and the thorough cleaning is difficultly realized are solved.

The invention provides a side frame, which comprises a frame body formed by connecting vertical columns and a horizontal bar; and a plurality of supporting arms provided on the frame body; the vertical columns are provided with a plurality of mounting holes, two ends of each of the supporting arms are respectively connected with mounting holes of two of the vertical columns of the frame body; one end of the horizontal bar of the frame body is provided with a fixing device for installing the frame body to a wall body. The present invention also provides a storage rack with side frames. The storage rack comprises at least two side frames and a plurality of boards, each of which is positioned between two side frames, and can be detachably connected to the supporting arms on the side frames. The side frames of the present invention have simple structure and strong practicability. The supporting arms of the side frames can form a stable connection with the frame body of the side frames, thereby improving the structural strength of the side frames. The invention of the storage rack with the side racks has better supporting capacity and load bearing effect, thereby improving the practicability and stability of the storage rack.

The invention discloses an application of aspergillus awamori in preparation of quercetin by fermenting lichee peel. Experiments show that quercetin can be extracted from fermented culture after the lichee peel is fermented by aspergillus awamori GIM3.4; but in a control group, no quercetin is detected in the fermented culture obtained after fermentation of lichee peel in which a sterilized aspergillus awamori GIM3.4 spore suspension serving as an inoculator is inoculated, thus the aspergillus awamori GIM3.4 can be used for fermenting the lichee peel to produce quercetin.