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The most dangerous isomers are considered to be those containing ortho isomers, such as tri-ortho-cresyl phosphate, TOCP.The World Health Organization stated in 1990 that "Because of considerable variation among individuals in sensitivity to TOCP, it is not possible to establish a safe level of exposure" and "TOCP are therefore considered major hazards to human health."
In parts of Britain and Ireland, it was often called the parish pump. Though such community pumps are no longer common, people still used the expression parish pump to describe a place or forum where matters of local interest are discussed. [3] Because water from pitcher pumps is drawn directly from the soil, it is more prone to contamination.
The power needed from the drive is proportional to the pressure and capacity of the pump. [1] Seals are an integral part of piston pumps and plunger pumps to separate the power fluid from the medium that is being pumped. A stuffing box or packing is used to seal the joint between the vessel where the medium is transferred and the plunger or ...
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In 1963, Ortho introduced the second oral contraceptive available in the United States (Ortho-Novum 10 and Ortho-Novum 2, produced by Syntex). In 1964, Ortho bought rights to and marketed the Gynekoil (Margulies Coil) and Lippes Loop inert plastic IUDs in the United States until the mid-1970s and 1985, respectively.
By the end of 1948, Aerojet had designed, built, and tested a liquid hydrogen pump (15 cm diameter). Initially, it used ball bearings that were run clean and dry, because the low temperature made conventional lubrication impractical. The pump was first operated at low speeds to allow its parts to cool down to operating temperature. When ...
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Spacelab art, with lab interior cutaway, 1981 Wubbo Ockels in the lab, 1985 Mercuric iodide crystals grown on Spacelab 3. Spacelab was a reusable laboratory developed by European Space Agency (ESA) and used on certain spaceflights flown by the Space Shuttle.