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  2. Leaf blower - Wikipedia

    en.wikipedia.org/wiki/Leaf_blower

    A leaf blower, commonly known as a blower, is a device that propels air out of a nozzle to move debris such as leaves and grass cuttings. Leaf blowers are powered by electric or gasoline motors . Gasoline models have traditionally been two-stroke engines , but four-stroke engines were recently introduced to partially address air pollution concerns.

  3. Vacuum pump - Wikipedia

    en.wikipedia.org/wiki/Vacuum_pump

    The Roots blower is one example of a vacuum pump. A vacuum pump is a type of pump device that draws gas particles from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was preceded by the suction pump, which dates to antiquity. [1]

  4. Vacuum Oil Company - Wikipedia

    en.wikipedia.org/wiki/Vacuum_Oil_Company

    Vacuum Oil Company was an American oil company known [according to whom?] for their Gargoyle 600-W steam cylinder motor oil. [citation needed] After being taken over by the original Standard Oil Company and then becoming independent again, in 1931 Vacuum Oil merged with the Standard Oil Company of New York to form Socony-Vacuum, later renamed to Mobil and eventually merging with Standard Oil ...

  5. Vacuum aspiration - Wikipedia

    en.wikipedia.org/wiki/Vacuum_aspiration

    Single-use double-valve manual vacuum aspirator. Vacuum or suction aspiration is a procedure that uses a vacuum source to remove an embryo or fetus through the cervix.The procedure is performed to induce abortion, as a treatment for incomplete spontaneous abortion (otherwise commonly known as miscarriage) or retained fetal and placental tissue, or to obtain a sample of uterine lining ...

  6. Stoma - Wikipedia

    en.wikipedia.org/wiki/Stoma

    Stoma in a tomato leaf shown via colorized scanning electron microscope image A stoma in horizontal cross section The underside of a leaf. In this species (Tradescantia zebrina) the guard cells of the stomata are green because they contain chlorophyll while the epidermal cells are chlorophyll-free and contain red pigments.

  7. Bionic Leaf - Wikipedia

    en.wikipedia.org/wiki/Bionic_Leaf

    The Bionic Leaf is a biomimetic system that gathers solar energy via photovoltaic cells that can be stored or used in a number of different functions. Bionic leaves can be composed of both synthetic ( metals , ceramics , polymers , etc.) and organic materials ( bacteria ), or solely made of synthetic materials.

  8. Sims' vaginal speculum - Wikipedia

    en.wikipedia.org/wiki/Sims'_vaginal_speculum

    Sims' double bladed vaginal speculum. In gynaecology, Sims' vaginal speculum is a double-bladed surgical instrument used for examining the vagina and cervix.It was developed by J. Marion Sims out of pewter spoon, [1] but nowadays it is manufactured out of stainless steel or plastic.

  9. Plant stem - Wikipedia

    en.wikipedia.org/wiki/Plant_stem

    The stem anatomy of ferns is more complicated than that of dicots because fern stems often have one or more leaf gaps in cross section. A leaf gap is where the vascular tissue branches off to a frond. In cross section, the vascular tissue does not form a complete cylinder where a leaf gap occurs.