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  2. Reflux - Wikipedia

    en.wikipedia.org/wiki/Reflux

    The reflux system in a typical industrial distillation column. Reflux is a technique involving the condensation of vapors and the return of this condensate to the system from which it originated. It is used in industrial [1] and laboratory [2] distillations. It is also used in chemistry to supply energy to reactions over a long period of time.

  3. Stretta procedure - Wikipedia

    en.wikipedia.org/wiki/Stretta_procedure

    Stretta is a minimally invasive endoscopic procedure for the treatment of gastroesophageal reflux disease (GERD) that delivers radiofrequency energy in the form of electromagnetic waves through electrodes at the end of a catheter to the lower esophageal sphincter (LES) and the gastric cardia – the region of the stomach just below the LES.

  4. Soxhlet extractor - Wikipedia

    en.wikipedia.org/wiki/Soxhlet_extractor

    A Soxhlet extractor is a piece of laboratory apparatus [1] invented in 1879 by Franz von Soxhlet. [2] It was originally designed for the extraction of a lipid from a solid material. Typically, Soxhlet extraction is used when the desired compound has a limited solubility in a solvent, and the impurity is insoluble in that solvent. It allows for ...

  5. Fractional distillation - Wikipedia

    en.wikipedia.org/wiki/Fractional_distillation

    The reflux flowing downwards provides the cooling required for condensing the vapors flowing upwards. The reflux ratio, which is the ratio of the (internal) reflux to the overhead product, is conversely related to the theoretical number of stages required for efficient separation of the distillation products.

  6. Florence flask - Wikipedia

    en.wikipedia.org/wiki/Florence_flask

    A Florence flask has a round body, a long neck, and often a flat bottom. It is designed for uniform heating, boiling, distillation and ease of swirling; it is produced in a number of different glass thicknesses to stand different types of use. They are often made of borosilicate glass for heat and chemical resistance

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  8. Dean–Stark apparatus - Wikipedia

    en.wikipedia.org/wiki/Dean–Stark_apparatus

    The Marcusson apparatus, Dean-Stark apparatus, Dean–Stark receiver, distilling trap, or Dean–Stark Head is a piece of laboratory glassware used in synthetic chemistry to collect water [1] [2] (or occasionally other liquid) from a reactor. It is used in combination with a reflux condenser and a distillation flask for the separation of water ...

  9. Flameless ration heater - Wikipedia

    en.wikipedia.org/wiki/Flameless_ration_heater

    A focus group of 26 soldiers was surveyed to compare heating an MRE with a Zesto-Therm pad compared to the canteen cup method heated with a trioxane fuel bar. 100% preferred the flameless ration heater: it was compact, disposable, and didn't require equipment to carry and clean. [1]: 4 However, it was about twice as expensive as a trioxane fuel ...