191 results about "Laboratory flask" patented technology

The invention relates to an interfacing device for establishing a connection between a fluid-injection instrument and a flask, said device comprising: fluid flow means configured such as to open into the flask to be perforated when the interfacing device is attached to the flask to be perforated; and a distal opening allowing the flow of gases and a proximal opening allowing the flow of liquids.

The invention discloses a kesterite structure Cu2ZnSnS4 powder material for a solar photovoltaic cell, and a liquid phase preparation method thereof; the liquid phase preparation method comprises the steps that: the material is weighed in the principle of CuCl2.2H2O:ZnCl2:SnCl4.5H2O:sulphur powder=2 (1 to 1. 5): (1 to 1. 5): (4 to 5) (molar ratio) and put into a round-bottom three-neck flask to be mixed, then organic solvent triethylene tetramine solution is added in, the mixture stays still for 3min to 5min, and uniform brick red solution is obtained; after nitrogen is fed in as protective gas, and the brick red solution is put into constant temperature oil bath to be heated to 120DEG C to 240DEG C, maintained for 0.5h to 12h, and then naturally cooled to room temperature; anhydrous ethanol and distilled water are used for sequentially washing a product, then the product is filtered and dried, and black powder is obtained. The liquid phase preparation method of the kesterite structure Cu2ZnSnS4 powder material is green, has no pollution, short reaction time and low required temperature, is convenient to operate, has low cost, and is applicable to the large-scale production of Cu2ZnSnS4 powder (for a photovoltaic cell absorption layer).

An apparatus and method for use in the biopharmaceutical and chemical industries to facilitate the temporary attachment of standard laboratory glassware to vibratory mixers and other types of aggressive shaking equipment. The container holder couples the entire flask or container to the mixing equipment in a secure fashion. The technology may be used with conventional glass flasks, or with plastic flasks that can be configured for either single-use or multiple-use. The invention allows for single handed, low force insertion of the flaskware as well as the incorporation of sensors into the container holder.

The invention discloses an self-adaptive flask brush head mechanism, a flask brush and a flask cleaning device, and mainly relates to the field of laboratory instrument cleaning. The device comprisesa mounting base. A rotating central shaft is mounted on the mounting base, a first lead screw is arranged on the upper part of the middle shaft, and a rail frame is fixed on the mounting base. The rail frame is provided with a lifting frame which is slidably connected to the lifting rail, and the first thread of the first screw is fixed on the lifting frame. The bottom end of the lifting frame isconnected with a control tube through the inference bearing, and the control tube and the central axis are circumferentially limited. The bottom end of the control tube is provided with an upper brushdisc, and the bottom end of the middle shaft is provided with a lower brush disc. An elastic rod is disposed between the upper brush plate and the lower brush plate, and the elastic rod surrounds thecentral axis annular array and is provided with bristles. The device has the beneficial effects of effectively solving the cleaning problem of the round bottom flask, greatly improving the efficiencyof the brushing with and significantly improved cleaning effect. The cleanliness of the experimental vessels is guaranteed.

The invention relates to a mass preparation method and a mass preparation device of graphene quantum dots. According to the invention, conductive carbon black is adopted as a raw material and concentrated nitric acid is adopted as an oxidant; conductive carbon black and concentrated nitric acid are placed in a flask, and a magnetic stirrer is also placed in the flask; the flask is provided with a reflux device, and one section of the pipe in the reflux device is a condenser pipe; the flask is placed in an oil bath pot, and the oil bath pot is heated to a temperature of 135+ / -2 DEG C; under the stirring of the magnetic stirrer, a reflux reaction is carried out for 24+ / -6h under a temperature of 135 DEG C; a low-temperature thermostat bath device is turned off, and the oil bath pot is heated to a temperature of 180+ / -2 DEG C; argon is delivered to the bottom of the flask, and concentrated nitric acid evaporation is carried out for 10+ / -2h under the temperature of 180+ / -2 DEG C; an obtained solid sample is dissolved in deionized water, and the mixture is centrifuged with a high-speed centrifuge; an upper-layer suspension liquid is fetched after centrifugation, and is respectively filtered with a 220nm filter membrane and a 25nm filter membrane; unoxidized carbon black or large particles are removed; a graphene quantum dot solution obtained after suction filtration is collected, and is subjected to rotary evaporation under a temperature of 40-80 DEG C with a rotary evaporator; and an obtained concentrated graphene quantum dot solution is subjected to freezing and drying with a vacuum freeze-drying machine.

A volumetric densiometer flask for determining the volumetric density of a solute includes: (a) a first bulbous portion in a lower end section of the flask; (b) a second bulbous portion in an upper end section of the flask, the second bulbous portion comprising an open mouth at its upper end; (c) a central neck comprising a central channel in open communication with the first bulbous portion at an upper end of the neck, and the second bulbous portion at an opposite, lower end of the neck; and (d) a removable stopper that is closely insertable into the mouth of the second bulbous portion, the mouth being correspondingly sized to a lower end of the stopper. Also included herein is a procedure for determining the volumetric density of a given sample using the volumetric densiometer flask.

The invention concerns a device comprising a combination: of at least two individual flasks or containers (1, 2) mutually linked by all or part of their undersides (3), and of a removable fixing system (4) essentially comprising a suction cup and / or a rod (6) provided with a hook, while one of said flasks comprises in said underside a cavity which, alone or in combination with a similar cavity located on the underside of another flask of said combination of flasks, defines a recessed space wherein the head of said suction cup and / or said rod provided with a hook can penetrate and remain force- or spring-locked, with the possibility of being eventually rotated and separated by a simple manual effort.

The invention discloses preparation and application of a BiOCl-(001) / GO nano-composite photocatalyst and belongs to the field of photocatalysts. The active component of the composite photocatalyst is BiOCl-(001) / GO. The BiOCl-(001) / GO composite photocatalyst is characterized in that the crystal surface engineering technology and an electronic extracting effect are combined, GO and a BiOCl monocrystal nano-piece of an exposure face (001) are recombined, and the BiOCl-(001) / GO nano-composite photocatalyst is prepared. The preparation method comprises the steps that NaCl and sodium oleate are put into a round-bottom flask, deionized water is added, sufficient stirring is conducted to enable sodium oleate and NaCl to be dissolved fully, graphene is added, constant-temperature stirring is conducted, Bi(NO3)3 is added slowly, cooling, washing and drying are conducted after a reaction is carried out for a certain time, and then the target product is obtained. The prepared nano-composite photocatalyst can be applied to a reaction of degrading methyl orange, and a good catalytic effect and stability are achieved.

A modular tray for removably holding a plurality of cell culture t-flasks (t-flasks) at a solution angle is described, discussed and disclosed. Such t-flasks may be held within the modular tray in a manner which forms a solution angle for each held t-flask, such that a bottom surface of the t-flask is minimally raised up off of the inside resting surface of the modular tray, while a bottom edge of the t-flask rests upon the inside resting surface, in order to prevent media within the t-flask from wetting contamination prone regions of the t-flask, such as a neck and a vent cap, which reduces the probability of the held t-flask containing cells and media from becoming contaminated. Additionally, each modular tray may be removably coupled to another modular tray to form an array or a matrix of modular trays.

The invention relates to a preparation method of a fluorescent material, amd in particular relates to a preparation method for a SiO2-based organic-inorganic hybridized fluorescent material. The preparation method comprises the following steps of: adding nanometer SiO2 microspheres into a certain amount of organic solvent and silane coupling agent mixing solution, performing magnetic stirring for 3-8 hours, then filtering, washing, and drying to obtain solid powder, namely surface-functionalized nanometer SiO2 microspheres; and adding the surface-functionalized nanometer SiO2 microspheres, organic fluorescent molecules and organic solvent into a three-neck flask according to certain proportion, stirring for 5-30 minutes, then increasing the temperature of a reaction system to 100-300 DEG C, performing condensation and reflux, filtering the solution, washing and drying to obtain solid powder, namely the SiO2-based organic-inorganic hybridized fluorescent material. Compared with the original preparation method, the method is simple in technology, short in preparation period, low in cost and easy to realize.

These inventions intend to provide an improved method and apparatus for molding molds having no flask. A match plate is put between an upper and a lower flask having intakes for foundry sand. An upper and a lower molding space are defined by inserting an upper and a lower squeeze means into openings of a pair of the upper and the lower flask having no match plate, and a pair of the upper and the lower flask and the match plate are rotated and moved so that they become perpendicular, and are moved so that the intakes of the flasks move upward. The upper and the lower molding space are filled with the foundry sand. The foundry sand in the molding space is squeezed by squeezing means. A pair of the flasks and the match plate are rotated so that they become horizontal. Then the match plate is removed. While the preceding processes are being carried out, if necessary the core is installed between the molds, the flasks are matched to each other, and the molds are removed from the pair of flasks.

A volumetric densiometer flask for determining the volumetric density of a solute includes:(a) a first bulbous portion in a lower end section of the flask;(b) a second bulbous portion in an upper end section of the flask, the second bulbous portion comprising an open mouth at its upper end;(c) a central neck comprising a central channel in open communication with the first bulbous portion at an upper end of the neck, and the second bulbous portion at an opposite, lower end of the neck; and(d) a removable stopper that is closely insertable into the mouth of the second bulbous portion, the mouth being correspondingly sized to a lower end of the stopper. Also included herein is a procedure for determining the volumetric density of a given sample using the volumetric densiometer flask.

The invention discloses a physical experimental apparatus box, wherein a box cover is provided with two through holes matched with mounting bolts of a lever support, one side of the reverse side of the box cover is provided with a bind hole, and the middle part of the reverse side of the box cover is provided with two raised-strip guide rails in parallel; the inner cavity of a box body is provided with a bracket which is provided with a measuring cylinder, a spring dynamometer and a flask respectively in clamping way, the lever support, a lever cross beam and a flask support are arranged beside the measuring cylinder, and the inner cavity of the measuring cylinder is provided with a thermometer pulley support and a laser pen; a counter balance is arranged beside the spring dynamometer, and a mechanical part case, an optical small-part case and an optical bid-part case are arranged at two sides of the tip of the counter balance; and the optical small-part case is internally provided with a fixed pulley, a movable pulley and hook weights, and the optical big-part case is internally provided with an optical socket, a small pore plate, a white screen, a convex lens, a plane mirror, plane glass and a circular dial scale. The physical experimental apparatus box disclosed by the invention has the advantages of small size, multiple purposes, portability and low cost, can be taken by every student who participates in a physical experiment, and can meet the requirements for making experiments independently by the students.

The invention relates to a preparation method of a CsPb1-xZnxBr3 perovskite quantum dot. The method comprises the following steps: 1, mixing a cesium source, a lead source and a zinc source in a three-neck flask; then injecting oleic acid (OA), oleylamine (OLA) and 1-octadecene (ODE), under the protection of nitrogen atmosphere, performing heating and magnetic stirring to fully react, after the reaction is finished, applying ice-water bath treatment, performing centrifugal washing to obtain CsPb1-xZnxBr3 perovskite quantum dots, and finally dispersing the quantum dots into n-hexane to be stored. The CsPb1-xZnxBr3 perovskite quantum dot prepared by adopting the method has the characteristics of high crystallization quality, high PL luminous intensity and high PL quantum yield up to 57%, andcan be applied to the fields of illumination, display, photovoltaics and the like.

This invention relates to measurement method for medium moisture content device and its method, which comprises three-way valve, vacuum generator, boiling flask, single valve, drying device and vacuum list, wherein, the drying device is laid with drying agent; the one end of three-way valve is connected with drying device and the other end with vacuum generator and with third end as testing medium entrance; the other end of drying device is connected to the flask through single valve; the flask side tube is connected to the vacuum list.

The invention discloses a doped-nano-Cu2O-based visible light catalysis plate ultrafiltration membrane and a preparation method thereof and belongs to the technical field of membrane separation. The preparation method comprises the following steps: adding 8.0-20.0% (w / w) of polysulfone or polyether sulfone, 5.0-15.0% (w / w) of a pore-foaming agent, 0.05-2.0% (w / w) of a surfactant, 0.05-5.0% (w / w) of doped nano Cu2O and 58.0-86.9% (w / w) of a solvent into a three-mouth round-bottom flask according to a certain sequence; performing stirring at the temperature of 30-80 DEG C for 5-16 h for complete dissolution, and leaving to stand for defoaming for 8-24 h to prepare a casting membrane solution; and adopting a phase inversion method to perform membrane scraping on a clean glass plate to prepare the visible light catalysis plate ultrafiltration membrane. The prepared doped-nano-Cu2O-based visible light catalysis plate ultrafiltration membrane has the pure water flux of larger than or equal to 430 L / m<2> / hr / 0.1 MPa, the bovine serum albumin rejection ratio of larger than or equal to 90.00% and the fulvic acid degeneration removal rate of about 60% (running for 1 h under simulated visible light), has favorable anti-fouling property and visible light catalysis performance, and is particularly suitable for water treatment of micro-polluted water sources, seawater desalination pretreatment, treatment and recycling of wastewater in the fields of biology, chemical engineering and medicines.

The invention relates to a split type splashing-proof flask device. The split type splashing-proof flask device comprises an upper main body, a lower main body, a splashing-proof flow guiding plate and a rubber sealing ring, wherein the upper main body and the lower main body are connected by threads, the splashing-proof flow guiding plate is fixed at a flask mouth of the upper main body, and a sealing device is arranged at the junction of the upper main body and the lower main body. The device has the advantages that the problem that flasks cannot contain bulk solid reactants is excellently solved, the problem of liquid splashing due to the fact that a flow guiding rod is required to be used during liquid adding is solved, and the problem that the flasks are difficultly cleaned after carrying out chemical experiments is also solved, so that the practicability is very strong.

The invention discloses a preparation method of a t-Se rod supported BiOCl ultrathin nanosheet composite photocatalyst, and belongs to the technical field of environmental material preparation. The method comprises the following specific steps of: adding cadmium chloride and methacrylic acid into deionized water serving as a solvent, adjusting the pH value of the solution after stirring, injectingsupernatant liquid obtained after dissolving selenium powder and sodium borohydride in deionized water, introducing nitrogen, pouring the solution into a three-neck flask for heating, naturally cooling the solution, and carrying out centrifuging, washing and drying to obtain CdSe quantum dots; and mixing a BiOCl precursor solution and the CdSe quantum dots in a mannitol solution with stirring, pouring the mixture into a reaction kettle, naturally cooling the mixture to room temperature after hydrothermal reaction for a certain period of time, opening the kettle, carrying out centrifugal washing and drying, and carrying out drying to obtain a composite photocatalyst. The composite photocatalyst provided by the invention can effectively utilize visible light to degrade tetracycline hydrochloride in antibiotic wastewater, is simple and convenient to operate, and is a green and environment-friendly high-efficiency treatment technology.

The innovative glass flasks have a standard taper outer joint to fit the most commonly used glassware in chemical laboratories. Unlike the round bottom flasks, the innovative flasks with an external flat bottom can be kept upright on the bench without the flask holder support. The flasks can be held by a corresponding shaped cooling block or heating block to perform multi-flask reactions simultaneously on a magnetic hot plate stirrer without the use of clamps at various temperatures. It also ensures that the magnetic stir bars spin consistently and efficiently on a flat or a shallow hemispherical bottom when the flasks are offset from the center of the magnetic stirrer. The flasks can also resist fracturing under vacuum for solvent distillations.

The invention relates to the technical field of biochemical experiments, and discloses a rapid flask cleaning device for biochemical experiments. The rapid flask cleaning device comprises a frame body, a cleaning mechanism, an extension mechanism and a brushing mechanism, wherein the frame body is an L-shaped body with a hollow interior and a hollow bottom surface, the cleaning mechanism and the extension mechanism are fixedly installed inside the frame body, and the brushing mechanism is fixedly installed on the right side of the frame body. Through the arrangement of the extension mechanism,the distance between two cleaning rings can be automatically expanded in the friction cleaning process, so that when the cleaning rings go deep and separate from a pipe opening of a flask to reach the interior, the two cleaning rings can be continuously expanded to the maximum expansion state, and thus friction cleaning can be conducted on the deepest maximum-size inner wall of the flask; the cleaning rings can be supported after a rubber pipe is inflated; and through the arrangement of the brushing mechanism, the flask can be filled with cleaning liquid through simple operation, and the operation can be combined with the friction cleaning step so that the efficiency can be improved, and the cleaning effect can be improved in cooperation with the friction cleaning work.

The invention relates to a system for dispensing a fluid contained in a flask, said system includes a body intended to be associated with said flask and a plunger tube mounted in an association portion formed on said body, wherein said tube is intended to be submerged in the fluid so as to enable said system to be supplied with fluid to be dispensed, with the association portion including a bore in which a portion of the plunger tube fits, and said bore has an annular projection with a diameter restricted with respect to the diameter of the portion of the tube that is fit, with said projection being formed at the junction between a lower converging portion and an upper diverging portion.

The invention relates to a novel splashing-proof flask device. The novel splashing-proof flask device comprises an upper main body, a lower main body, a splashing-proof flow guiding plate and a rubber sealing ring, wherein the upper main body and the lower main body are connected by threads, the splashing-proof flow guiding plate is fixed at a flask mouth of the upper main body, and a sealing device is arranged at the junction of the upper main body and the lower main body. The splashing-proof flask device further comprises a water suction device, wherein the water suction device is arranged on the sealing device. The device has the advantages that the problem that flasks cannot contain bulk solid reactants is excellently solved, the problem of liquid splashing due to the fact that a flow guiding rod is required to be used during liquid adding is solved, and the problem that the flasks are difficultly cleaned after carrying out chemical experiments is also solved, so that the practicability is very strong.

These inventions intend to provide an improved method and apparatus for molding molds having no flask. A match plate is put between an upper and a lower flask having intakes for foundry sand. An upper and a lower molding space are defined by inserting an upper and a lower squeeze means into openings of a pair of the upper and the lower flask having no match plate, and a pair of the upper and the lower flask and the match plate are rotated and moved so that they become perpendicular, and are moved so that the intakes of the flasks move upward. The upper and the lower molding space are filled with the foundry sand. The foundry sand in the molding space is squeezed by a squeezing means. A pair of the flasks and the match plate are rotated so that they become horizontal. Then the match plate is removed. If necessary, the core is installed between the molds, the flasks are matched to each other, and the molds are removed from the pair of flasks.

The invention relates to the technical field of preparation of rare metal materials, in particular to a preparation method of a nitric acid induced gold nanobelt by a seeding method. The preparation method of the nitric acid induced gold nanobelt comprises the steps of adding a trisodium citrate solution to a 3-neck flask and heating; injecting a chloroauric acid solution while stirring; finally turning the solution into wine red, removing a heat source, stopping stirring, cooling and keeping in dark place at 4 DEG C; dissolving CTAB (Cetyl Trimethyl Ammonium Bromide) and heating in water bath; injecting 830 uL of HAuCl4 solution, a nitric acid solution and an ascorbic acid solution; injecting a gold sol until the solution turns into dark red and red brown, cooling to room temperature, centrifugal separating, discarding a supernatant liquid and clarifying the solution to obtain the nitric acid induced gold nanobelt. A single-crystal gold nanobelt prepared by using the seeding method has a width between 50 nm and 200 nm and a length between 0.7 pm and 3 pm; the nanobelt is smooth and complete in surface, good in crystallinity and grows along the 111 crystal orientation; the method provided by the invention is simple and easy to operate, high in operability and liable to popularization and utilization in large area.

The invention discloses a three-mouth flask which comprises a first bottleneck (1), a second bottleneck (2), a third bottleneck (3) and a bottle body (4), wherein, a connecting rod (5) is respectively arranged between the first bottleneck (1) and the second bottleneck (2) and between the second bottleneck (2) and the third bottleneck (3). The three-mouth flask provided in the invention is convenient to fix and heat.