306 results about "Erlenmeyer flask" patented technology

The invention relates to the field of automatic shaking devices, and discloses a novel conical flask automatic shaking device, including a burette, wherein the outer surface of the side end of the conical flask is provided with a fixed clip and a movable clip. The conical flask automatic shaking device is provided with a vertical guide rod on the outer shell, and a straightening ring is movably connected with the vertical guide rod through a transverse guide rod, which is conducive to straightening the bottleneck of the conical flask to ensure that the mouth of the burette is always aligned with the center of the bottle mouth, and then ensures that the titration liquid drips into the bottle smoothly. By providing a support base on the rotating base, the support base and the rotating base are movably connected through magnetic steel, and the eccentricity can be arbitrarily adjusted according to actual needs, and then the conical flask can form different shaking amplitudes to meet the requirements. By providing an adjusting bolt on one side of the movable clip, the movable clip is movably connected with the support base through a rubber connecting belt, which is conducive to installing the conical flask in the fixed clip and the movable clip, and can fix the conical flask.

The utility model discloses an oscillation structure for pesticide residue detection, which comprises a collection tube, a conical flask, a base and an oscillation plate arranged above the base, and further comprises an integral loading mechanism which comprises an oscillation box, placing grooves which are uniformly distributed are formed in the top of the oscillation box, and a chassis is arranged at the bottom of each placing groove; the inner wall of the circumference of the containing groove is rotationally connected with a connecting rod, one end of the connecting rod is fixedly connected with a clamping rod, the portion, close to the middle, of the outer wall of the circumference of the clamping rod is fixedly connected with a first spring, and one end of the first spring is fixedly connected to the inner wall of the containing groove. The oscillation structure for pesticide residue detection provided by the utility model has the technical effects that the oscillation structure is suitable for collecting tubes with different diameters, the collecting tubes are prevented from toppling over, the conical flask is arranged on the limiting mechanism, a container can be independently fixed, a plurality of limiting mechanisms are arranged, oscillation detection can be simultaneously carried out, the oscillation time is saved, and the working efficiency is improved.

The invention discloses an extraction method of rose flavonoids, which comprises the following steps: S1, crushing selected dry Hetian rose buds, and storing for later use; s2, accurately weighing 1g of rose powder and putting the rose powder into a conical flask; s3, then, according to the material-liquid ratio of 1: 40, 40% ethanol is used as a solvent, and the materials are poured into a conical flask to be mixed; and S4, finally, soaking in a constant-temperature water area, extracting for 2 hours, and finally, taking supernate for later use. According to the invention, the solid-liquid ratio of 1: 40 ensures that the rose powder is fully infiltrated by an enough solvent (40% ethanol). Under the proportion, the ethanol can be in full contact with target components (such as flavonoid compounds and the like) in the rose powder. Each 1g of rose powder is surrounded by 40ml of solvent, so that target components have more opportunities to be dissolved out of powder particles to enter the solvent, and the extraction completeness can be improved compared with the condition that a feed liquid is relatively small.

A culture medium unsealing and transferring device relates to the field of container unsealing and comprises a moving plate, a supporting plate, a rotating plate, a rotating shaft and a rotating shaft, the unsealing mechanism is arranged on the supporting plate and comprises a moving frame moving in the length direction of the unsealing mechanism, a vertically-moving pressing plate is arranged on the inner side of the moving frame, a plurality of clamping rings are arranged on the pressing plate, a vertically-moving supporting frame is arranged above the pressing plate, a plurality of pressing blocks are arranged on the supporting frame, mucilage glue is arranged at the bottoms of the pressing blocks, and a plurality of hooks are arranged on the peripheral sides of the pressing blocks; the clamping mechanism is arranged at one end of the supporting plate and comprises a bearing frame which moves vertically and rotates around one side of the bearing frame, and a plurality of clamping rods are arranged on the bearing frame; the transfer mechanism is arranged at the other end of the supporting plate and comprises a rotating frame which is movably arranged in the length direction and the vertical direction of the rotating frame, a plurality of clamping blocks are arranged on the rotating frame in the length direction of the rotating frame and used for clamping the conical flasks, and the rotating frame rotates along the connecting line of the centers of the clamping blocks. According to the device, the conical flasks can be unsealed in batches, culture media in the conical flasks can be transferred, efficiency is improved, and the requirement for large-batch operation is met.

The conical flask comprises a flask body, a quantitative liquid taking cylinder is arranged inside a flask opening of the flask body, a connecting assembly connected with the flask body is arranged on the quantitative liquid taking cylinder, a liquid inlet is formed in the bottom of the quantitative liquid taking cylinder, an upper fixing cover plate is fixedly connected to the top of the quantitative liquid taking cylinder, and a lower fixing cover plate is fixedly connected to the bottom of the upper fixing cover plate. The surface of the upper fixing cover plate is connected with an opening and closing assembly. According to the quantitative liquid taking device, the rotating block drives the rotating connecting shaft to rotate, so that the rotating connecting shaft drives the opening and closing plate to rotate, the opening and closing plate does not shield the liquid inlet any more, then the bottle body is inclined and vertically inverted, liquid enters the quantitative liquid taking barrel through the liquid inlet, and after the quantitative liquid taking barrel is filled with the liquid, the rotating block is rotated again, so that the quantitative liquid taking barrel is filled with the liquid. And the opening and closing plate shields the liquid inlet, then the sealing plug is taken down, liquid in the quantitative liquid taking cylinder is discharged through the liquid discharging pipe, and the effect of accurate and quantitative liquid taking is achieved.

The utility model discloses a split charging device for producing a magnetic particle reagent. The split charging device comprises a speed-adjustable shaking table and a peristaltic pump, the shaking table comprises a base, a supporting plate is installed on the upper side of the base, a plurality of triangular flasks capable of containing magnetic particle reagents are installed on the upper side of the supporting plate, the supporting plate is provided with supporting tables corresponding to the triangular flasks, the supporting tables are provided with clamping arms for clamping the triangular flasks, and arc-shaped clamping pieces are installed at the ends of the clamping arms and abut against the side walls of the triangular flasks for clamping. A prepared magnetic particle reagent to be subpackaged is placed on a supporting table and fixed through a clamping arm, a disposable clean hose is used for communicating a reagent bottle with a peristaltic pump, parameters such as the flow speed, the volume and the interval time of the peristaltic pump are adjusted, after debugging is completed, a horizontal shaking table is started for gentle and uniform mixing, and the peristaltic pump is started after complete uniform mixing. And constant subpackaging can be carried out downstream according to set subpackaging parameters, and human intervention on the device is not needed in the midway.

The invention relates to the technical field of experimental equipment, in particular to a constant-temperature quantitative split charging super clean table of a shaking table and an application method thereof, the constant-temperature quantitative split charging super clean table comprises a super clean table body, and a constant-temperature box and a conical flask are detachably mounted in the super clean table body; the driving assembly is connected with the constant-temperature box, and the driving assembly can drive the constant-temperature box to reciprocate; the quantitative split charging assembly is arranged in the super clean bench body, and the quantitative split charging assembly is used for quantitatively extracting a mixed solution of a culture medium and a strain in the conical flask; the concentric plate group is arranged in the constant-temperature box, and the concentric plate group can prevent the hot liquid in the constant-temperature box from splashing out; and the suction assembly is provided with a plurality of nozzles and is circumferentially installed in the constant-temperature box at equal intervals, the suction assembly is matched with a guide piece arranged on the driving assembly, and when the constant-temperature box moves to the end of the stroke, the hot liquid in the constant-temperature box can move from the outside of the conical flask to the top down, the heating effect is improved, and the hot liquid is prevented from splashing.

The invention discloses a preparation and use method of a polishing solution for precise polishing of a nickel-based superalloy GH4169, and belongs to the technical field of ultra-precision machining. The method comprises the following steps: firstly, grinding a GH4169 alloy sheet, and then sequentially carrying out mechanical polishing and chemical mechanical polishing. The mechanical polishing solution comprises the following components: an abrasive with the concentration of 10%, and the balance of water, the chemical mechanical polishing solution comprises the following components in percentage by weight: 10% of grinding material, 5% of oxidant, 0.2%-0.3% of pH regulator and the balance of water, the raw materials of the components are sequentially added into a clean conical flask and are continuously stirred by using a glass rod, and ultrasonic cleaning and other operations are carried out, so that the raw materials of the components are uniformly stirred to form a stable turbid liquid. The environment-friendly polishing solution has the characteristics of environment-friendly component raw materials, simple preparation process, low experimental cost and the like, the prepared polishing solution can be ensured to have good polishing performance, the surface roughness of a polished sample is remarkably reduced, and the environment-friendly polishing solution has good development potential.

The invention relates to a mercury content detection method, and relates to the technical field of mercury detection. According to the mercury content detection method, the to-be-detected sample is preliminarily quantified by using the X-ray spectrometer, the mercury content range of the to-be-detected sample can be quickly obtained, the to-be-detected sample is weighed according to the preliminarily measured mercury content, and the accuracy and reliability of subsequent detection can be guaranteed. By means of constant-temperature water bath heating, it can be guaranteed that a sample to be detected is completely decomposed, meanwhile, a solution in the cover type funnel is poured back into the conical flask, mercury compounds volatilized after heating can be collected, mercury content loss is avoided, and the stability and accuracy of subsequent detection results are further guaranteed. The mercury standard solution is prepared, the inductively coupled plasma emission spectrometer is used for detection, manual titration operation is not needed, the anti-interference capability is good, the mercury content can be accurately measured, and the stability and accuracy of a detection result are effectively guaranteed.

The utility model discloses a COD (Chemical Oxygen Demand) digestion device, relates to the technical field of water quality detection instruments, and solves the problems that when the existing COD digestion device is not used, a conical flask and a return pipe are usually directly placed on the COD digestion device, no protective device is arranged outside the conical flask and the return pipe, and external dust directly falls on the device when the conical flask and the return pipe are placed for a long time, so that the subsequent use is influenced. According to the technical scheme, the problems that a conical flask, a backflow pipe and other glassware are damaged due to the fact that the conical flask and the backflow pipe are easily touched by mistake, and using is inconvenient are solved, the device comprises a groove body, two L-shaped supports and a main machine body, the two symmetrical L-shaped supports are fixedly installed on the upper surface of the rear side of the groove body, and the bottom of the main machine body is fixedly connected with the top planes of the L-shaped supports. According to the utility model, through the matching design of the two L-shaped protective plates and the back plate, the conical flask and the return pipe in the COD digester are sealed and shielded, so that external dust is not easy to directly fall on the conical flask and the return pipe, and the follow-up use is facilitated.

The utility model provides a strain fermentation tank inoculation device which comprises a barrel and a flame ring, the barrel can be arranged on an inoculation opening in a sleeving mode, a sleeve is fixed to a fermentation tank, a net ring is fixed to the inner wall of the barrel, the flame ring is annularly fixed to the upper end of the net ring, and a conical cover integrally formed with the barrel is arranged at the upper end of the barrel. The top of the conical cover is provided with a through hole capable of pouring bacterial liquid for inoculation through the conical flask. According to the inoculation device for the strain fermentation tank, when a flame inoculation method is used for strain inoculation, flames generated by igniting the flame ring are limited in the barrel, the effects that the flames cover the inoculation opening to keep a sterile environment and prevent infectious microbes from entering the fermentation tank are achieved, diffusion of surrounding flames is limited through the barrel and the conical cover, and the inoculation effect is improved. And the risk that operators are scalded is reduced.

The invention discloses a method for carrying out nine-fold breeding by utilizing female gametes, and relates to the technical field of biological breeding. Comprising the following steps: step 1, pollinating hexaploid persimmon pollen to a'rattan royal house 'containing 2n eggs; 2, collecting young fruits which are born for 65-70 days after pollination, stripping seeds, putting the seeds into a sterilized triangular flask, treating the seeds for 30 seconds in an ultra-clean workbench by using 70% ethanol, pouring out the seeds, adding a 1% NaClO solution, soaking the seeds for 10 minutes, and shaking the seeds once every 3-4 minutes. According to the method for carrying out nine-fold breeding by utilizing female gametes, in persimmon breeding, compared with a 2n pollen path, the 2n egg path is higher in feasibility, 2n eggs and complete male germplasm with good pollen traits are hybridized, pollination populations are expanded, and polyploidy seedless materials can be obtained.

The invention discloses a rapid detection and on-site treatment method for ammonia and black oil in fly ash, which comprises the following steps: 1) weighing 200g of fly ash from the batch of fly ash, putting the fly ash into a conical flask, adding 80g-90g of water for stirring, and stirring; (2) after stirring is completed, covering a conical bottle opening with test paper soaked with a 1% phenolphthalein alcohol solution; 3) if the test paper turns red, determining that ammonia with relatively high content exists; 4) standing for 8-10 minutes, and observing whether black oil exists on the surface of the neat paste; 5) after the detection is completed, treating excessive ammonia and black oil in the fly ash; according to the present invention, the ammonia content is rapidly detected by using the test paper impregnated with the 1% phenolphthalein alcohol solution, the black oil is observed by standing, and the concrete stirring and vibrating process is combined so as to achieve the real-time determination and the emergency treatment of the fly ash pollutants, such that the concrete structure quality is improved, and the fly ash field detection method is supplemented.

An oval conical flask titration clamp comprises a first clamp body, a second clamp body and an elastic connecting piece, and the first clamp body and the second clamp body are connected to the two ends of the elastic connecting piece respectively. The first clamp body, the second clamp body and the elastic connecting piece are arc-shaped, and the inner arc surface of the first clamp body is opposite to the inner arc surface of the second clamp body. The first clamp body and the second clamp body are made of wood, bamboo or plastic, the inner cambered surface and the outer cambered surface are rough surfaces, and the elastic connecting piece is made of metal. According to the titration clamp disclosed by the utility model, the first clamp body, the elastic connecting piece and the second clamp body form an approximately elliptical shape which is matched with the shape formed by the thumb, the jaw and the index finger of a human hand, so that the human hand can firmly and stably grasp the titration clamp and clamp a conical flask. And the first clamp body and the second clamp body are made of wood, bamboo or plastic, so that a heat insulation effect can be achieved, an experimenter is prevented from being scalded, and the titration clamp is suitable for titration analysis operation after heating.

The utility model relates to the technical field of physical and chemical inspection, and discloses a titration assembly for physical and chemical inspection, which comprises a base, mounting plates are fixedly connected to the left side and the right side of the upper part of the base, a mounting groove is formed in the middle of the base, chutes are formed in the lower parts of the opposite sides of the mounting plates, and stirring assemblies are arranged in the chutes. And the upper parts of the opposite sides of the mounting plates are fixedly connected with electric telescopic rods, and the opposite sides of the electric telescopic rods are provided with mounting assemblies for mounting the titration assemblies. According to the titration assembly, through the cooperation of the valve, the burette, the conical flask, the magnetic stirring device, the magnetic stirring rotor, the air cylinder, the supporting plate and other structures, liquid medicine and titration liquid can be fully stirred when the titration assembly is used for detecting the phlegm reducing liquid medicine, and the accuracy of detecting the phlegm reducing liquid medicine is improved.

The invention discloses a method for detecting the purity of a battery-grade lithium salt. The method comprises the following steps: weighing the lithium salt, putting into a conical flask, and stirring for dissolving; adding a methyl red-bromocresol green indicator into the first to-be-detected solution, and titrating with a hydrochloric acid standard titration solution until the first to-be-detected solution is wine red; adding a phenolphthalein indicator into the second to-be-detected solution for titration; adding a methyl red-bromocresol green indicator, and titrating to wine red; and finally, calculating the purity percentage of the lithium salt. The detection method can be effectively used for analysis and detection of battery-grade lithium carbonate, lithium hydroxide monohydrate and lithium oxide, and compared with a traditional method, the method has the advantages that the sample dosage is small, the hydrochloric acid consumption is small, and the method is more environmentally friendly; meanwhile, the influence that hydrochloric acid consumption of carbonate ions is not considered in the traditional national standard can be effectively solved, so that the detection accuracy is improved; meanwhile, the method can also be effectively used for analysis and detection of battery-grade lithium oxide.

The utility model provides a novel funnel type body fluid sample bottle for collecting and storing body fluid samples, which comprises a bottle body, the top of the bottle body is in threaded connection with a wide-mouth bottle cap, the bottle body comprises a cylindrical bottle body and a conical bottle body, the cylindrical bottle body is connected with the conical bottle body, the cylindrical bottle body is positioned above the conical bottle body, and the conical bottle body is positioned above the conical bottle body. The bottom of the conical flask body is connected with a return pipeline, an annular protrusion is arranged on the inner side of the lower portion of the cylindrical flask body, a supporting frame is arranged below the cylindrical flask body, and the supporting frame is connected or connected to the outer side of the conical flask body in a sleeved mode. The novel funnel-type body fluid sample bottle for collecting and storing the body fluid sample is simple in structure, the wide-mouth bottle above the bottle body is used for collecting body fluid, the lower portion of the bottle body is funnel-shaped, deposition and centrifugation of visible components are facilitated, the bottom of the conical bottle body is connected with the sample outlet through a return pipeline and is controllable and normally closed, operation is simplified, and the bottle is convenient to use. The opportunity that an operator is in contact with the contents to pollute the contents can be avoided, and the concentration of liquid particle components at the lower part is improved.

The invention discloses a method for determining the content of amylose and amylopectin in corn through a full-automatic flow injection analyzer method, and particularly relates to the field of determination of the content of amylose and amylopectin in corn, the method comprises the following steps: taking a corn kernel sample, crushing into powder, and passing through a 80-mesh screen to obtain corn kernel sample powder; the corn kernel sample powder is subjected to reflux extraction degreasing through a degreasing agent, and a degreased corn kernel sample is obtained; the method comprises the following steps: weighing a degreased corn kernel sample, putting the degreased corn kernel sample into a conical flask, adding a 95% ethanol solution, transferring a sodium hydroxide solution into the conical flask, and heating the conical flask in a boiling water bath for 10 minutes to obtain a to-be-detected corn sample with starch dispersed; taking out the to-be-detected corn sample, cooling to room temperature, transferring into a volumetric flask, adding distilled water to a constant volume, shaking uniformly, analyzing by a flow injection analyzer, and calculating to obtain the content of amylose in the corn sample. The method has the advantages of high automation degree, high detection speed and simple sample treatment.

The utility model discloses a reaction device for preparing a molecular fluorescent probe, which comprises a support plate, an adjusting rod fixedly connected to the outer surface of the top of the support plate, a moving ring slidably connected to the outer surface of the adjusting rod, a funnel sleeved in a limiting ring, a connecting pipe fixedly connected to the bottom of the funnel, and a conical flask arranged below the connecting pipe. The conical flask is placed above the supporting plate; a positioning frame is fixedly connected to the upper surface of the fixing ring, a fixing block is slidably connected to the interior of the positioning frame, a positioning block is rotatably connected to the fixing block, a torsional spring is arranged between the positioning block and the fixing block, and a limiting plate is fixedly connected to the outer surface of the upper portion of the positioning block. According to the reaction device for preparing the molecular fluorescent probe, the positioning block is pressed on the outer surface of the filter paper, so that the position of the filter paper can be fixed, the filter paper cannot move under the driving of the glass rod when a user conducts drainage and filtration, and then liquid is prevented from moving into filtrate from the edge of the funnel; therefore, the purity of the interior of the filtrate is relatively high.

This invention discloses an extremely salt-tolerant halophilic bacterium, HD16, which can grow under extreme salinity conditions up to 4.0 M sodium chloride (approximately 230 g / L sodium chloride) and also exhibits high alkalinity tolerance, surviving at pH 7–11. Therefore, it is predicted to have broad application prospects in wastewater treatment and other fields. Furthermore, it can be used to produce polyhydroxyalkali (PHA). When cultured in a 500 ml Erlenmeyer flask, the cell dry weight yield reaches 9.45 g / L, with PHA accounting for 72.97% of the bacterial dry weight. The extreme salt tolerance and high alkalinity tolerance of this strain enable it to efficiently accumulate polyhydroxyalkali esters under open, non-sterile conditions.

The utility model relates to the field of malt physicochemical index detection, and discloses a distillation extraction device for detecting peat phenol value in peat malt, which comprises a support II, a support I and an electric jacket, the outer side of the support II is fixedly connected with a bottom support, the middle part of the bottom support is provided with a condenser pipe, the inside of the condenser pipe is fixedly connected with a coiled pipe, and the coiled pipe is fixedly connected with the support I; a distiller is installed on the outer side of the first support through a chain clamp, a distiller cover is installed on the top of the distiller, a water outlet and a water inlet are sequentially and fixedly connected to the outer side of the condensation pipe from top to bottom, and a conical flask is arranged under the coiled pipe. According to the utility model, the technical scheme of a distillation condensation mode is adopted, so that total phenols in malt can be continuously and uniformly collected. According to the scheme, the whole collection process does not exceed 20 minutes, and the distillation water can be continuously supplemented, so that the efficiency is greatly improved. Compared with the problems of low collection efficiency and complex operation in the prior art, the scheme greatly simplifies the experimental process and improves the overall working efficiency.

The utility model provides a titration device for medicine detection, which belongs to the technical field of titration detection and comprises a clamping mechanism arranged in an inner cavity of a base, a pull rope fixedly connected to one end of a pull rod, a winding disc arranged at the other end of the pull rope, a first bevel gear fixedly connected to the bottom of the winding disc, and a support shaft fixedly mounted at the bottom of the first bevel gear, the torsional spring and the first bevel gear are arranged on the outer surface of the supporting shaft in a sleeving mode, the supporting shaft rotates, the first bevel gear drives the second bevel gear, the rotating shaft and the spiral guide roller which are meshed with the first bevel gear to rotate, and the first bevel gear moves left and right on the surface of the spiral guide roller along with rotation of the spiral guide roller to drive the clamping rod to clamp the conical flask. According to the utility model, the conical flask can be effectively clamped and fixed through the matching of all parts between the clamping mechanisms, and the problems that the conical flask is easy to turn over or slide down due to the fact that the conical flask cannot be fixed during titration in the prior art, so that personnel need to prepare materials again, time and energy are wasted, and the working efficiency is delayed are solved.

The invention relates to a method for detecting the content of white oil in polystyrene, which is applied to the field of polystyrene resin detection and comprises the following steps: S1, weighing a polystyrene sample, putting the polystyrene sample into a conical flask with a plug, adding methylbenzene into the conical flask with the plug, and oscillating and dissolving; s2, putting the conical flask with the stopper into a warm water bath, and meanwhile, adding a precipitator into the conical flask with the stopper to precipitate a polymer; s3, adding a precipitant while shaking when the precipitant is dropwise added, and quickly cooling after the precipitant is completely precipitated; s4, filtering by using suction filtration equipment, collecting the filtered solution, concentrating to obtain a concentrated sample solution, and weighing the concentrated sample solution; and S5, sucking a proper amount of concentrated sample liquid by using a microsyringe, then injecting the concentrated sample liquid into a chromatographic instrument, and determining, by accurately controlling precipitation conditions and a separation process, the problems of white oil wrapping by precipitation, filter membrane blockage and insufficient detection limit in a traditional method are solved, and high-precision and high-repeatability white oil content detection is realized.

The invention relates to a method for producing pentamethylene diamine through liquid-solid two-phase fermentation. The method comprises the following steps: inoculating a seed culture medium with an activated recombinant escherichia coli strain, and culturing to obtain a seed solution; according to the recombinant escherichia coli, pET28a (+) is taken as a carrier, and a lysine decarboxylase gene CadA is subjected to heterologous expression; inoculating the obtained seed solution into a fermentation conical flask containing a solid culture medium for fermentation culture and induction, and centrifuging and resuspending the obtained bacterial solution to obtain a bacterial suspension; and mixing the obtained bacterial suspension with a buffer solution containing lysine hydrochloride and pyridoxal phosphate, carrying out a catalytic reaction, and centrifuging to obtain 1, 5-pentanediamine. Compared with common fermentation, the method has the advantages that the growth density of E.coli is obviously improved by 2.41 times, and the yield of pentamethylene diamine reaches 524.71 mM in the catalysis process. The two-phase fermentation system is beneficial to improving the growth density and the production efficiency of E.coli by providing a more suitable growth environment and improving oxygen transfer, so that the accurate control on the expression process is realized.

The utility model relates to the technical field of experimental appliances, and discloses a draining rack which comprises a base, a volumetric flask rack arranged in the base, a disc-shaped pipette rack detachably connected to the top of the base, a beaker rack fixed on the front side of the base, a draining plate arranged below the beaker rack and used for storing liquid flowing out of the pipette rack and the beaker rack, and a water outlet arranged below the draining plate. And a pipette rack is arranged below the draining plate. According to the draining rack, a pipette can be clamped on the pipette rack for hanging and draining, a volumetric flask and a conical flask are inversely buckled on the volumetric flask rack for draining, a beaker is inversely buckled on the beaker rack, a pipette and a glass rod penetrate through the pipette rack and are supported by the draining plate, and liquid flowing down along the beaker rack and the pipette rack is received by the draining plate. Liquid is prevented from dripping on the pipette below to cause cross contamination, and various instruments are placed on the draining rack, so that the space utilization rate of the draining rack can be increased, and various experimental instruments can be reasonably placed on the whole draining rack.

The utility model relates to an improved nitrogen distillate absorption device, which comprises a distillation flask, a splash-proof ball tube, a guide tube, a condensing tube and a conical flask with double connecting balls which are connected in sequence, and a dropping funnel is arranged between the distillation flask and the splash-proof ball tube, and is characterized in that the distillation flask is provided with a temperature control device, the guide tube is U-shaped, and the condensing tube is arranged in the conical flask. The conical flask with the double connecting balls is connected to the lower end of the condenser pipe, and the opening of the conical flask with the double connecting balls is S-shaped. The gas absorption and titration device is simple, clear and accurate, and solves the problems that in the prior art, the heating temperature is too high, the temperature control is unstable, and the heating is not uniform; the gas flow speed is too high, so that the absorption is incomplete; the solution absorbed by the conical flask is easy to splash out, and system errors are easy to generate, so that the test is accurate.

The invention discloses a preparation method of a microbial inoculum of mycorrhizal fungi wax mushroom bicolor. The preparation method of the microbial inoculum mainly comprises preparation of a culture medium and preparation of the microbial inoculum. The formula of the liquid culture medium is as follows: 10g of glucose, 2g of maltose, 1g of yeast extract (yeast extract), 0.5 g of monopotassium phosphate, 0.25 g of diammonium hydrogen phosphate, 0.15 g of magnesium sulfate, 5mL of calcium chloride dihydrate with the concentration of 1%, 2.5 mL of sodium chloride with the concentration of 1% and 1.2 mL of ferric chloride with the concentration of 1% are dissolved in each liter of distilled water. The formula for preparing the solid culture medium is consistent with that of the liquid culture medium, and 15 g of agar needs to be added per liter. The culture medium needs high-temperature and high-pressure sterilization. The method comprises the following steps: cutting a solid microbial inoculum into small blocks of about 1cm < 3 >, putting one small block in the center of a culture dish, pasting one side with hyphae on a culture medium, sealing with a sealing film, and culturing in a dark place to obtain the solid microbial inoculum. In the culture of the liquid fungicide, small solid fungicide blocks with hyphae need to be put into a sterilized liquid culture medium, 15-20 small blocks are put into each conical flask (250mL conical flask, and 200mL liquid culture medium is put into each conical flask), and the conical flasks in which the fungicide blocks are put are put into a shaking table to be cultured in a dark place at the temperature of 25 DEG C and the rotating speed of 160 revolutions. The method provided by the invention can be used for rapidly and massively preparing the bicolor wax mushroom microbial inoculum, and is convenient for experiment and production practice of the bicolor wax mushroom microbial inoculum. The culture medium is low in cost, and the microbial inoculum is stable in quality.

The utility model provides a conical flask drying placing frame which comprises a base, two stand columns are symmetrically arranged on the top of the base, a lower supporting plate and an upper supporting plate are fixedly arranged on the stand columns from bottom to top, and supporting holes matched with conical flasks are formed in the upper supporting plate and the lower supporting plate. A baffle is arranged above the upper supporting plate along the stand column in a sliding mode, and a locking mechanism used for locking or releasing the baffle and the stand column is arranged on the baffle. According to the conical flask cleaning device, the cleaned conical flasks are inversely arranged in the supporting holes in the upper supporting plate and the lower supporting plate, the openings of the conical flasks face downwards so that residual water in the conical flasks can be drained conveniently, meanwhile, the baffle blocks and limits the conical flasks above the conical flasks, the conical flasks are prevented from falling off from the upper supporting plate and the lower supporting plate after being collided and vibrated, and the conical flasks are prevented from falling off from the upper supporting plate and the lower supporting plate. And the placing stability of the conical flask is improved.

A cooking disinfection frame comprises a base plate, a plurality of supporting legs are arranged on the base plate, a plurality of air holes are formed in the base plate, the supporting legs serve as supporting parts, the lower ends of the supporting legs are placed at the lower end of a cooking pot, and the air holes can enable water vapor to penetrate through and disinfect appliances. A plurality of vertically arranged vertical rods are arranged on the base plate, connecting rods are arranged at the upper ends of the vertical rods, the connecting rod located at the lower end is connected to the lower end of the vertical rod located at the upper end, a plurality of outward extending rods are arranged on the vertical rods, a plurality of vertical rods are arranged on the outward extending rods, and when appliances such as beakers and conical flasks are placed, the vertical rods can be arranged in the appliances in a penetrating mode. The vertical rods are used for supporting the appliances, and the openings of the placed appliances face downwards, so that steam can conveniently enter the appliances, and the inner walls of the appliances can be conveniently disinfected. Meanwhile, after being placed, the appliances are arranged at intervals, so that the appliances are prevented from being damaged during transferring.

The invention provides a traditional Chinese medicine extract detection method, and relates to the field of extract detection. Comprising the following steps: S1, precisely weighing M1 g of a test sample, and adding the test sample into a conical flask; s2, adding 100 mL of an ethanol solution into the conical flask, and sealing the conical flask opening; s3, preliminarily shaking up the solution system in the conical flask, then fixing the conical flask on an oscillator, setting the oscillation time to be 6 hours and the frequency to be 120 Hz, and then standing for 18 hours; s4, filtering the solution system in the conical flask, and precisely measuring 20mL of filtrate; s5, drying the evaporation dish to constant weight, weighing the weight of the evaporation dish, and recording the weight as M4; adding the filtrate weighed in the step S3 into a dry evaporation dish, drying to constant weight, and recording as M5; and S6, calculating the content of the extract in the test sample. According to the detection method, the cost of inspection personnel is effectively reduced, the inspection efficiency is improved, personnel errors can be effectively reduced, and the time utilization rate of inspection is improved.