A modular stand apparatus offers safe and effective setup of laboratory experiments. The apparatus allows a user to couple vertical rods to a first plate. A second plate, parallel to the first plate and vertically translating up and down the vertical rods, permits the user of any height to utilize the apparatus and the placement of an extraneous rigging such as jack, scale, etc. A plurality of horizontal rods including hypotenuse and adjacent rods detachably couples with the vertical rods and permits the placement of extraneous rigging. The horizontal rods replace monkey bars in conventional systems so that the user does not have to lean or stretch hands/arms inside a fume hood, thus eliminating potential unsafe operations and/or physical injuries. Due to the use of a larger and more stable surface of the second plate over the extraneous rigging, the apparatus eliminates possible toppling over and/or system collapsing.

A positioning apparatus for restraining an object includes a base plate, an attachment plate, and a securing element. The base plate may include guides into which protrusions of the attachment plate slide to alter the positioning apparatus from an open position to a closed position. The base plate also includes receivers to receive tubular members, which have their movement restrained by the receivers and the securing elements in the closed position. The positioning apparatus may also include a latch to help maintain the closed position during operation.

The invention discloses a detection system of polychlorophenol in dye, including a shell and a working chamber arranged in the shell, wherein the working chamber is provided with a rotatable connecting shaft, the upper end of the connecting shaft, is rotatably provided with a shaft mounting block, the upper side of the connecting shaft is provided with a rotary table, the lower end face of the rotary table is provided with a buffer chamber with a downward opening, and the shaft mounting block is located in the buffer chamber. The invention realizes the automation of the extraction step in the detection process of polychlorophenol, and can automatically add potassium carbonate solution to the dye. Compared with manual addition, the invention improves the accuracy, ensures the success of subsequent detection and improves the accuracy of detection. After the addition of potassium carbonate solution, the invention can Automatic oscillation improves efficiency.

A positioning apparatus for restraining an object includes a base plate, an attachment plate, and a securing element. The base plate may include guides into which protrusions of the attachment plate slide to alter the positioning apparatus from an open position to a closed position. The base plate also includes receivers to receive tubular members, which have their movement restrained by the receivers and the securing elements in the closed position. The positioning apparatus may also include a latch to help maintain the closed position during operation.

A laboratory stand comprises a holding rod for receiving instruments or measuring devices for treating or examining media or substances or mixtures which may be contained or filled into a vessel arranged next to the holding rod in the usage position, into which vessel appropriate instruments or measuring instruments can engage from above. In order to be able to perform the metering of the substances in the vessel prior to, or during, the processing in a simple manner and/or in order to be able to quickly and reliably identify weight changes, support projections are moveably mounted and provided with, or connected or provided with an operative connection to, a weighing apparatus such that the displacement of the set-up feet, which is increased in the case of increasing weight or reduced in the case of decreasing weight, can be determined as weight change.

A laboratory stand comprises a holding rod for receiving instruments or measuring devices for treating or examining media or substances or mixtures which may be contained or filled into a vessel arranged next to the holding rod in the usage position, into which vessel appropriate instruments or measuring instruments can engage from above. In order to be able to perform the metering of the substances in the vessel prior to, or during, the processing in a simple manner and/or in order to be able to quickly and reliably identify weight changes, support projections are moveably mounted and provided with, or connected or provided with an operative connection to, a weighing apparatus such that the displacement of the set-up feet, which is increased in the case of increasing weight or reduced in the case of decreasing weight, can be determined as weight change.

Cryogenic storage racks (cryoracks) and associated systems, devices, and methods are described herein. In one embodiment, a cryorack includes a first plate, a second plate, and a plurality of standoffs separating the first and second plates. The first plate can include openings configured to receive cryogenic vials. The cryorack can be carried by a cryorack holder that is positionable within a controlled-rate freezer. The cryorack holder can include a first shelf, a second shelf, and a plurality of standoffs separating the first and second shelves. The cryorack can be positioned over a first opening formed in the first or second shelf, and a portion of the cryorack can be inserted into the first opening or a second opening positioned along a perimeter of the first opening. In some embodiments, the cryorack is dimensioned to fit within a liquid nitrogen storage rack that is positionable within a liquid nitrogen storage container.

Cryogenic storage racks (cryoracks) and associated systems, devices, and methods are described herein. In one embodiment, a cryorack includes a first plate, a second plate, and a plurality of standoffs separating the first and second plates. The first plate can include openings configured to receive cryogenic vials. The cryorack can be carried by a cryorack holder that is positionable within a controlled-rate freezer. The cryorack holder can include a first shelf, a second shelf, and a plurality of standoffs separating the first and second shelves. The cryorack can be positioned over a first opening formed in the first or second shelf, and a portion of the cryorack can be inserted into the first opening or a second opening positioned along a perimeter of the first opening. In some embodiments, the cryorack is dimensioned to fit within a liquid nitrogen storage rack that is positionable within a liquid nitrogen storage container.

The invention relates to a rotary evaporator (1), including an equipment stand (2) with a protruding guide tower (3) which has a holder on which an evaporation vessel (5) is pivotably retained about a horizontal pivot axis (42). In one embodiment of the invention, the holder includes a holding part connected to the guide tower, wherein a carrying part (43) that can be connected to the evaporation vessel (5) is pivotably retained about a horizontal pivot axis on the holding part, and a spindle drive (44), which includes an adjustment spindle (45) with a self-locking spindle thread (46), is provided to adjust and secure the selected pivot position.

The invention relates to a rotary evaporator (1), including an equipment stand (2) with a protruding guide tower (3) which has a holder on which an evaporation vessel (5) is pivotably retained about a horizontal pivot axis (42). In one embodiment of the invention, the holder includes a holding part connected to the guide tower, wherein a carrying part (43) that can be connected to the evaporation vessel (5) is pivotably retained about a horizontal pivot axis on the holding part, and a spindle drive (44), which includes an adjustment spindle (45) with a self-locking spindle thread (46), is provided to adjust and secure the selected pivot position.