190 results about "Laboratory flask" patented technology

A flask is formed of two panels heat sealed together along with a base or bottom insert. Two spouts are provided proximate the top one of which is for the extraction of fluids and the other of which is for the introduction of fluids. The flask may have a bite valve or a fluid conduit attached to one spout cap. Both spouts may be sealed into and along the edge of the flask. Alternately, one spout may be formed into a panel and the other into and along the edge of the flask. Alternately a pump may be provided to pump air into the flask to pressurize the fluid so that it will be urged out of the flask and through the bite valve when it is open.

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 clamp for an Erlenmeyer flask or other laboratory containers or racks uses nickel-coated, rare earth magnets to secure the clamp to a platform for a laboratory shaker. The base of the clamp has downwardly extending positioning bosses that seat in holes or indentations on the shaker platform to prevent horizontal sliding of the clamp when the shaker is in use. A removable and replaceable, elastomeric cover for the base of the flask clamp provides cushioning and prevents spinning of the flask when the shaker is in use.

A method and apparatus for molding molds having no flask wherein a match plate having a pattern is put between a pair of 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 device into openings of the pair of the upper and the lower flask having no match plate, and the pair of the upper and the lower flask and the match plate are rotated and moved so that they become perpendicular and then the intakes of the flasks move upward. The upper and the lower molding space are then filled with the foundry sand. The foundry sand in the molding space is squeezed by the squeezing device. The pair of the flasks and the match plate are rotated so that they become horizontal. Then the match plate is removed, 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 cake (7), fitted with the rough pressing (71) of the stem parison (61) is situated on the ring (8) where by the action of its own gravity, it streams off till the rough pressing (71) fits into the cavity (41) of the bottom mould (4). There the rough pressing (71) is fastened by the underpressure and the air is blasted into the flask (6) and, in the same time, the bottom mould (4) is forced downwards. When the orifice (42) of the cavity (41) comes on the level of the surface (51) of the bottom opening of the glass-blowing mould (5), the glass-blowing mould (5) is closed and the air is blasted into the flask (6) until it obtains the shape of the inner wall (52) of the glass-blowing mould (5).

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.

A method and apparatus for molding molds having no flask wherein 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 device 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 spaces is squeezed by the squeeze devices. 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 a core can be 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 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.