Mercury vapor reference systems, devices, and method for testing mercury vapor analyzers. A variable volume dilution chamber such as a syringe selectively receives mercury vapor and a dilution gas to dilute the mercury vapor prior to dispensing into an airflow for testing by the mercury vapor analyzer.

Mercury vapor reference systems, devices, and method for testing mercury vapor analyzers. A variable volume dilution chamber such as a syringe selectively receives mercury vapor and a dilution gas to dilute the mercury vapor prior to dispensing into an airflow for testing by the mercury vapor analyzer.

A gas supply device for operation in an incubator allowing treatment of a culture within a shaker flask with gas independently of the composition and humidity of the gas atmosphere within the incubator individually supplies each shaker flask of the incubator with gas using a gas supply clamp detachably connected to the closure cap of each flask. The gas supply clamp has at least two elastic clamping jaws and a web connecting the clamping jaws to one another. The clamping jaws exert a clamping force on the side wall of the closure cap. The clamp is held in place by the elastic clamping jaws. Above a sterile filter in the closure cap, an individual gas atmosphere for treatment of the culture in the shaker flask is produced in a recess of the web above a gas passage in the closure cap.

The present application provides a gas inlet structure for a reagent kit, which includes a gas inlet connecting pipe and a plugging pipe arranged at one end of the gas inlet connecting pipe. The plugging pipe is provided with a gas nozzle plug, and the plugging pipe is in interference fit with the gas nozzle plug. The gas nozzle plug is provided with a gas inlet blind hole that is arranged along an axis direction of the gas nozzle plug, and an opening end of the gas inlet blind hole faces the gas inlet connecting pipe.

The present application provides a gas inlet structure for a reagent kit, which includes a gas inlet connecting pipe and a plugging pipe arranged at one end of the gas inlet connecting pipe. The plugging pipe is provided with a gas nozzle plug, and the plugging pipe is in interference fit with the gas nozzle plug. The gas nozzle plug is provided with a gas inlet blind hole that is arranged along an axis direction of the gas nozzle plug, and an opening end of the gas inlet blind hole faces the gas inlet connecting pipe.

Provided are devices for measuring the exposure of a tissue sample to a treatment medium, wherein the device provides for inspection without direct inspection of the tissue sample. The inspection may comprise visual inspection of the device. Treatment containers comprising these devices and methods of use of the devices and treatment containers are also provided.

Provided are devices for measuring the exposure of a tissue sample to a treatment medium, wherein the device provides for inspection without direct inspection of the tissue sample. The inspection may comprise visual inspection of the device. Treatment containers comprising these devices and methods of use of the devices and treatment containers are also provided.

Suggested is a method for the extraction of fragrances from natural starting material consisting of the following steps: (a) providing a sample of the natural starting material in a pressure proof sample container; (b) bringing in the sample in contact with liquefied petroleum gas of propane and/or butane gas, preferably; (c) extracting the fragrances from the natural starting material provided in step (b); (d) venting of the pressure proof sample container, while the liquefied petroleum gas is evaporated and the fragrances is maintained as residue in the container; and optionally (e) dissolving the fragrances in a suitable solvent.

Suggested is a method for the extraction of fragrances from natural starting material consisting of the following steps: (a) providing a sample of the natural starting material in a pressure proof sample container; (b) bringing in the sample in contact with liquefied petroleum gas of propane and/or butane gas, preferably; (c) extracting the fragrances from the natural starting material provided in step (b); (d) venting of the pressure proof sample container, while the liquefied petroleum gas is evaporated and the fragrances is maintained as residue in the container; and optionally (e) dissolving the fragrances in a suitable solvent.

A gas supply device for operation in an incubator allowing treatment of a culture within a shaker flask with gas independently of the composition and humidity of the gas atmosphere within the incubator individually supplies each shaker flask of the incubator with gas using a gas supply clamp detachably connected to the closure cap of each flask. The gas supply clamp has at least two elastic clamping jaws and a web connecting the clamping jaws to one another. The clamping jaws exert a clamping force on the side wall of the closure cap. The clamp is held in place by the elastic clamping jaws. Above a sterile filter in the closure cap, an individual gas atmosphere for treatment of the culture in the shaker flask is produced in a recess of the web above a gas passage in the closure cap.